WO2012111064A1 - Video signal monitoring device and video display device - Google Patents
Video signal monitoring device and video display device Download PDFInfo
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- WO2012111064A1 WO2012111064A1 PCT/JP2011/052996 JP2011052996W WO2012111064A1 WO 2012111064 A1 WO2012111064 A1 WO 2012111064A1 JP 2011052996 W JP2011052996 W JP 2011052996W WO 2012111064 A1 WO2012111064 A1 WO 2012111064A1
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- terminal
- video signal
- signal
- video
- circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0442—Handling or displaying different aspect ratios, or changing the aspect ratio
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/06—Colour space transformation
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline
Definitions
- the present invention relates to a video signal monitoring device and a video display device that detect type information for specifying types of a plurality of video signals.
- a video signal input terminal in addition to a computer terminal (for example, D terminal) that accepts an analog video signal, for example, an S (Separate) terminal that accepts a video signal that conforms to an analog television broadcast system, or an HDMI (High-Definition Multimedia Interface) ) Terminal and USB (Universal Serial Bus) terminal are known.
- a computer terminal for example, D terminal
- S Separate
- HDMI High-Definition Multimedia Interface
- USB Universal Serial Bus
- the video signal input to each input terminal is classified into the type of video signal, specifically, the type specified by the combination of the video signal color representation format (RGB signal or YUV signal) and the resolution of the video signal.
- the synchronization signal set accordingly is included.
- type information various types of information necessary for determining the type of a video signal is detected from a synchronization signal included in the input video signal, and video according to the type information is detected.
- a video display device that displays video by performing appropriate image processing on a signal is described.
- the video display device described in Patent Document 1 includes, as type information, horizontal synchronization frequency, vertical synchronization frequency, total number of lines, synchronization polarity (Nega or Posi), synchronization type (Sep (horizontal and vertical frequency), CS (composite sync). : Composite sync) or Sync ⁇ ⁇ ⁇ on G (green signal sync), Tri Sync (tri-level sync)), scan type (Interlaced: Interlaced or Non-Interlaced: noninterlaced), vertical sync width, and number of active video lines To detect.
- FIG. 1 is a block diagram of a related art video display device using a computer terminal (D terminal) 101, an HDMI terminal 102, an S terminal 103, and a USB terminal 104 as input terminals for video signals.
- D terminal computer terminal
- HDMI terminal 102 HDMI terminal
- S terminal 103 S terminal
- USB terminal 104 USB terminal
- the reception unit 401 receives a selection instruction indicating a selection input terminal that is receiving a video signal to be displayed.
- the signal discrimination monitoring circuit 301 When the selection instruction is accepted, the signal discrimination monitoring circuit 301 is connected to the selection input terminal via any one of the terminals IN1 to IN4. When the input terminal connected to itself (selection input terminal) is switched, the signal discrimination monitoring circuit 301 detects type information from the video signal from the input terminal after switching. The signal discrimination monitoring circuit 301 cannot accept a plurality of video signals at the same time.
- the signal discrimination monitoring circuit 301 sets the display signal from the scaler circuit 501 to a fixed value and displays the display video on the display panel 701.
- a predetermined image for example, a blue-black image
- the signal discrimination monitoring circuit 301 may instruct the scaler circuit 501 to freeze the display video as the input terminal is switched.
- the detection holding circuit 301b in the signal discrimination monitoring circuit 301 receives type information (horizontal synchronization frequency, vertical synchronization frequency, total number of lines, synchronization polarity, synchronization type, scan type, vertical synchronization) from the video signal from the input terminal after switching. Width and number of effective video lines).
- the detection holding circuit 301b outputs the detection result to the CPU 601.
- the CPU 601 determines the type of the video signal based on the detection result.
- the technique for determining the type of the video signal based on the detection result of the detection holding circuit 301b is described in Patent Document 1 and is well known, and thus detailed description thereof is omitted.
- the parameter value corresponding to the determination result specifically, the resolution conversion data for the scaler circuit 501, the aspect ratio, and the color system (whether the color representation format of the video signal is RGB format) Information indicating whether the format is YUV format) is supplied to the scaler circuit 501, and image processing performed by the scaler circuit 501 is set.
- a technique for setting image processing performed by the scaler circuit 501 by the CPU 601 is described in Patent Document 1 and is well known, and thus detailed description thereof is omitted.
- the scaler circuit 501 When the image processing is set by the CPU 601, the scaler circuit 501 performs the set image processing on the video signal from the signal discrimination monitoring circuit 301 to generate a display signal.
- the scaler circuit 501 When the scaler circuit 501 generates a display signal, the scaler circuit 501 cancels the display of a predetermined video (for example, a blue-black video) or the static state of the video, and displays the video corresponding to the display signal on the display panel 701.
- a predetermined video for example, a blue-black video
- the signal discrimination monitoring circuit 301 switches the video from the input terminal after switching from the input terminal connected to itself in order to switch the video signal to be displayed.
- the type information is detected from the signal.
- the related art video display device shown in FIG. 1 determines the type of the video signal based on the detection result of the signal discrimination monitoring circuit 301, sets the image processing according to the determination result, and sets the video signal to the video signal. Display the corresponding video.
- the signal discrimination monitoring circuit 301 must detect the type information every time the input terminal connected to itself is switched in accordance with the switching of the video signal to be displayed. This factor is due to the fact that the signal discrimination monitoring circuit 301 cannot receive a plurality of video signals at the same time and cannot simultaneously detect the type information from each of the plurality of video signals. Therefore, there has been a problem that a signal discrimination monitoring device capable of receiving a plurality of video signals at the same time and simultaneously detecting the type information from each of the plurality of video signals is desired.
- An object of the present invention is to provide a video signal monitoring apparatus and a video display apparatus that can solve the above-described problems.
- the video signal monitoring apparatus of the present invention specifies a type of video signal from a plurality of input terminals that receive a plurality of video signals and the video signals that are associated with the plurality of input terminals and that are received by the input terminal corresponding to the video signal monitoring apparatus.
- the video display device of the present invention provides the video signal monitoring device and a selection instruction for specifying a selection terminal that receives a selection video signal that is one of the plurality of video signals among the plurality of input terminals.
- a receiving unit that receives the selection instruction corresponding to the selection terminal among the plurality of detection units when the selection instruction is received, and performs image processing according to a detection result in the selection detection unit.
- the present invention it is possible to receive a plurality of video signals at the same time and simultaneously detect the type information from each of the plurality of video signals.
- FIG. 3 is a diagram illustrating a signal discrimination monitoring circuit 301.
- FIG. 3 is a diagram showing a signal discrimination monitoring circuit 302.
- FIG. 6 is a diagram showing a fixed signal line monitoring / holding circuit 303.
- FIG. 2 is a block diagram showing a video display device 1 according to an embodiment of the present invention.
- the same components as those shown in FIG. 2 are identical to FIG. 2, the same components as those shown in FIG.
- the video display device 1 has, as input terminals, a computer terminal (D terminal) 101, an HDMI terminal 102, an S terminal 103, a USB terminal 104, a display port terminal 105, a composite terminal (RCA terminal) 106, and RJ-45. Terminal 107.
- the video display device 1 also includes an A / D converter 201, an HDMI receiver 202, a video decoder 203, a display port receiver 205, terminals IN1 to IN5, a monitoring unit 300, a receiving unit 401, and a processing unit 500. And a display panel 701.
- the monitoring unit 300 includes a signal discrimination monitoring circuit 301, a signal discrimination monitoring circuit 302, and a fixed signal line monitoring holding circuit 303.
- the processing unit 500 includes a scaler circuit 501 and a CPU 601.
- the computer terminal (D terminal) 101, the HDMI terminal 102, the S terminal 103, the USB terminal 104, the display port terminal 105, the composite terminal 106, the RJ-45 terminal 107, and the monitoring unit 300 are included in the video signal monitoring apparatus. .
- the computer terminal (D terminal) 101 is an example of a first terminal and receives an analog video signal including a synchronization signal.
- the sync signal is type information (horizontal sync frequency, vertical sync frequency, total number of lines, etc.) set according to the type of video signal including the sync signal (the type specified by the combination of the color expression format and resolution). Sync polarity, sync type, scan type, vertical sync signal width and number of video lines).
- the HDMI terminal 102 is an example of a second terminal, and accepts a digital video signal (hereinafter referred to as “HDMI video signal”) compliant with the HDMI standard.
- the HDMI video signal includes a synchronization signal, a video Date Enable (data enable) signal (hereinafter referred to as a “DE signal”), an Auxiliary Video Information Info Frame (hereinafter referred to as an “AVI info frame”), a 5V signal, Plug signal.
- the AVI info frame is characteristic information indicating the characteristics of the HDMI video signal (for example, “RGB / YCbCr (444/422)”, “VideoLEVEL (RGB Quantization)”, “VideoLEVEL (YCbCr Quantization)”, “Scan (overscan, Underscan) ”,“ aspect ratio ”,“ IT Content ( ⁇ ) ”,“ Bar Info ”,“ ActiveF Info ”,“ Scaling ”,“ Colorimetry ”,“ Extended color ”, and“ xvColor ”).
- the information included in the AVI info frame is based on the HDMI standard.
- the display port terminal 105 is an example of a second terminal, and accepts a digital video signal (hereinafter referred to as “DP video signal”) compliant with the display port standard.
- the DP video signal includes a synchronization signal, a DE signal, display port configuration data (DisplayPort Configuration Data, hereinafter referred to as “DPCD”), a 5V signal, and a hot plug signal.
- DPCD DisplayPort Configuration Data
- the DPCD includes characteristic information (for example, “Link BW”, “Lane Count”, “Bit Depth”, “Comp Format”, “Dynamic Range”, and “Sampling Rate”) indicating the characteristics of the DP video signal.
- characteristic information for example, “Link BW”, “Lane Count”, “Bit Depth”, “Comp Format”, “Dynamic Range”, and “Sampling Rate” indicating the characteristics of the DP video signal.
- the information contained in the DPCD is based on the display port standard.
- the S terminal 103 and the composite terminal 106 are an example of a third terminal, and are NTSC (National Television Standards Committee), PAL (Phase Alternation by Line), or SECAM SEquential Couleur A Memoire (Analog Television Broadcasting) standards.
- NTSC National Television Standards Committee
- PAL Phase Alternation by Line
- SECAM SEquential Couleur A Memoire Analog Television Broadcasting
- the video signal received by each of the S terminal 103 and the composite terminal 106 includes a synchronization signal set according to the type of the video signal.
- the video signal conforming to the NTSC system has 240 video lines, a YUV format for color expression, and a 4: 3 aspect ratio.
- a video signal compliant with the PAL system has 288 video lines, a color expression format of YUV format, and an aspect ratio of 4: 3.
- a video signal compliant with the SECAM system has 288 video lines, a YUV format for color expression, and an aspect ratio of 4: 3.
- the RJ-45 terminal 107 and the USB terminal 104 are an example of a third terminal, and accept a video signal including a synchronization signal.
- the RJ-45 terminal 107 and the USB terminal 104 are connected to the video signal (the RJ-45 terminal 107 and the USB terminal 104 having the same resolution as that of the display panel 701 as an example of the display unit).
- Multimedia substrate output video signal decoded by the multimedia substrate being output.
- the video signals from the RJ-45 terminal 107 and the USB terminal 104 have the RGB color format.
- the number of video lines with the resolution of the display panel 701 is either 768, 800, or 1200.
- the number of video lines with the resolution of the display panel 701 is not limited to 768, 800, or 1200.
- the video signal output from the RJ-45 terminal 107 and the USB terminal 104 has a resolution of 1024x768, a color expression format is an RGB format, and is uniquely determined by the resolution.
- the specified aspect ratio is 4: 3.
- the video signal received by the RJ-45 terminal 107 and the USB terminal 104 has a resolution of 1366x768, a color expression format is an RGB format, and is uniquely specified by the resolution.
- the aspect ratio is 16: 9.
- the video signal received by the RJ-45 terminal 107 and the USB terminal 104 has a resolution of 1280x800, a color expression format is RGB, and is uniquely identified by the resolution.
- the aspect ratio is 16: 9.
- the video signal received by the RJ-45 terminal 107 and the USB terminal 104 has a resolution of 1920x1200
- a color expression format is an RGB format, and is uniquely specified by the resolution.
- the aspect ratio is 16: 9.
- the A / D converter 201 converts the analog video signal received by the computer terminal 101 into a digital signal.
- the HDMI receiver 202 receives an HDMI video signal from the HDMI terminal 102.
- the video decoder 203 receives video signals from the S terminal 103 and the composite terminal 106 and decodes the video signals.
- the display port receiver 205 receives a DP video signal from the display port terminal 105.
- Terminal N1 accepts the output of A / D converter 201.
- the terminal N2 receives the output of the HDMI receiver 202.
- the terminal N5 receives the output of the display port 205.
- the terminal N3 receives the output of the video decoder 203.
- the terminal N4 receives the multimedia board output video signal.
- the monitoring unit 300 includes a signal discrimination monitoring circuit 301 dedicated to an analog video signal from the computer terminal 101, a signal discrimination monitoring circuit 302 dedicated to a digital video signal from the HDMI terminal 102 or the display port terminal 105, and a video signal / S-video. And a fixed signal line monitoring and holding circuit 303 dedicated to the signal and the multimedia substrate output video signal.
- Each output of the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring holding circuit 303 can be arbitrarily output to the input terminal INa or INb of the scaler circuit 501 at the subsequent stage.
- FIG. 3 is a diagram showing the signal discrimination monitoring circuit 301 in the monitoring unit 300.
- the same components as those shown in FIG. 3 are identical to those shown in FIG. 3.
- the signal discrimination monitoring circuit 301 can generally be referred to as first detection means.
- the signal discrimination monitoring circuit 301 is associated with the computer terminal 101.
- the signal discrimination monitoring circuit 301 includes an all black detection circuit 301a, a detection holding circuit 301b, and a no signal determination circuit 301c.
- the no-signal determination circuit 301c determines whether or not a video signal is input to the signal determination monitoring circuit 301 from the terminal IN1. When the determination result of the no-signal determination circuit 301c is switched from the absence of the video signal to the presence of the video signal, the signal determination monitoring circuit 301 starts the signal determination process.
- the detection holding circuit 301b determines from the horizontal synchronization signal and the vertical synchronization signal included in the video signal, the horizontal synchronization frequency, the vertical synchronization frequency, the total number of lines, the synchronization polarity, the synchronization type, the scan type, the vertical synchronization width, The number of effective video lines is detected as type information, and the detection result is held.
- the detection result of the detection holding circuit 301b is a result corresponding to the type of the video signal.
- the signal discrimination monitoring circuit 301 when the all black detection circuit 301a detects an all black frame, and then the detection holding circuit 301b detects a change in the frequency of the horizontal synchronizing signal included in the video signal, the signal discrimination monitoring circuit. 301 determines that the type of the video signal from the terminal IN1 has been changed, and the detection holding circuit 301b detects the type information from the horizontal synchronization signal and the vertical synchronization signal included in the changed video signal, and the detection result is obtained. Hold.
- FIG. 4 is a diagram showing the signal discrimination monitoring circuit 302 in the monitoring unit 300. 4, the same components as those shown in FIG. 3 are denoted by the same reference numerals.
- the signal discrimination monitoring circuit 302 includes a DE detection holding circuit 302a, an AVI info frame detection holding circuit 302b, a DPCD detection holding circuit 302c, and a 5V hot plug. And a detection circuit 302d.
- the signal discrimination monitoring circuit 302 can be generally referred to as second detection means.
- the signal discrimination monitoring circuit 302 is associated with the HDMI terminal 102 and the display port terminal 105.
- the signal discrimination monitoring circuit 302 is alternatively connected to the terminals IN2 and IN5.
- the detection holding circuit 301b in the signal discrimination monitoring circuit 302 receives a horizontal synchronization frequency, a vertical synchronization frequency, the total number of lines, a synchronization polarity, a synchronization type, a scan type, and a vertical synchronization from a synchronization signal included in the HDMI video signal from the terminal IN2.
- the width and the number of effective video lines are detected as type information regarding the terminal IN2.
- the detection holding circuit 301b in the signal discrimination monitoring circuit 302 holds type information regarding the terminal IN2.
- the detection holding circuit 301b in the signal discrimination monitoring circuit 302 receives a horizontal synchronization frequency, a vertical synchronization frequency, the total number of lines, a synchronization polarity, a synchronization type, a scan type, from a synchronization signal included in the DP video signal from the terminal IN5.
- the vertical synchronization width and the number of effective video lines are detected as type information regarding the terminal IN5.
- the detection holding circuit 301b in the signal discrimination monitoring circuit 302 holds type information regarding the terminal IN5.
- the DE detection holding circuit 302a detects the DE signal from the HDMI video signal from the terminal IN2, and holds the detection result as type information regarding the terminal IN2.
- the DE detection holding circuit 302a detects the DE signal from the DP video signal from the terminal IN5, and holds the detection result as type information regarding the terminal IN5.
- the AVI info frame detection holding circuit 302b detects the AVI info frame from the HDMI video signal as type information regarding the terminal IN2, and holds the detection result.
- the DPCD detection holding circuit 302c detects DPCD as type information related to the terminal IN5 from the DP video signal, and holds the detection result.
- the 5V hot plug detection circuit 302d detects whether a 5V signal and a hot plug signal are input.
- FIG. 5 is a diagram showing the fixed signal line monitoring and holding circuit 303 in the monitoring unit 300.
- the fixed signal line monitoring and holding circuit 303 can be generally called third detection means.
- the fixed signal line monitoring and holding circuit 303 is associated with the S terminal 103, the USB terminal 104, the composite terminal 106, and the RJ-45 terminal 107.
- the fixed signal line monitoring and holding circuit 303 is alternatively connected to the terminals IN3 and IN4.
- the fixed signal line monitoring and holding circuit 303 When the fixed signal line monitoring and holding circuit 303 receives a video signal (a video signal conforming to the NTSC system, a video signal conforming to the PAL system, or a video signal conforming to the SECAM system) from the terminal IN3, it is included in the video signal.
- the number of video lines is detected from the synchronization signal as type information regarding the terminal IN3.
- the fixed signal line monitoring and holding circuit 303 holds type information related to the terminal IN3.
- the video signal input to the S terminal 103 and the composite terminal 106 is one of a video signal conforming to the NTSC system, a video signal conforming to the PAL system, and a video signal conforming to the SECAM system.
- the video signal input to the S terminal 103 and the composite terminal 106 has a video line number of 240 (video signal conforming to the NTSC system) or 288 (video signal conforming to the PAL system and video signal conforming to the SECAM system). ),
- the aspect ratio is always 4: 3
- the color representation is always YUV.
- the aspect ratio and the color system are 4: 3 and YUV signals, respectively. It is decided beforehand. Therefore, if the number of video lines is known, the CPU 601 can specify the information (resolution conversion data, aspect ratio and color system) set in the scaler circuit 501 and the type of video signal.
- the fixed signal line monitoring and holding circuit 303 when the fixed signal line monitoring and holding circuit 303 receives the multimedia board output video signal from the terminal IN4, the fixed signal line monitoring and holding circuit 303 detects the number of video lines as the type information regarding the terminal IN4 from the synchronization signal included in the multimedia board output video signal. The fixed signal line monitoring and holding circuit 303 holds type information related to the terminal IN4.
- the multimedia substrate output video signal input to the terminal IN4 has the same resolution as that of the display panel 701. Also, the color representation format of the multimedia board output video signal is always the RGB format.
- the color system is determined in advance as the RGB signal among the resolution conversion data, the aspect ratio, and the color system, which are information set in the scaler circuit 501, and the aspect ratio is also set.
- the aspect ratio of the display panel 701 is determined, and resolution conversion data is also determined. For this reason, if it is determined that a video signal having the same number of video lines as the number of video lines defined at the same resolution as that of the display panel 701 is input, the CPU 601 is information set in the scaler circuit 501. (Resolution conversion data, aspect ratio and color system) and video signal type can be specified.
- the accepting unit 401 can be generally called accepting means.
- the reception unit 401 identifies an input terminal (selection terminal) that is one of the computer terminal 101, the HDMI terminal 102, the S terminal 103, the USB terminal 104, the display port terminal 105, the composite terminal 106, and the RJ-45 terminal 107. A selection instruction for accepting is accepted.
- the accepting unit 401 accepts a selection instruction (for example, a selection instruction indicating the computer terminal 101 as a selection terminal) transmitted from the remote control by the user operating the remote control, for example. Upon receiving the selection instruction, the reception unit 401 outputs the selection instruction to the CPU 601.
- a selection instruction for example, a selection instruction indicating the computer terminal 101 as a selection terminal
- the reception unit 401 Upon receiving the selection instruction, the reception unit 401 outputs the selection instruction to the CPU 601.
- the video signal indicated by the selection instruction is referred to as a “selected video signal”.
- Processing unit 500 can generally be referred to as processing means.
- the processing unit 500 outputs the selected video signal received by the selection terminal from the monitoring unit 300 and associates the selected video signal with the selection terminal among the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring holding circuit 303.
- the type information of the selected video signal is read from the selected circuit, and the display signal is generated by performing image processing according to the type information on the selected video signal.
- the processing unit 500 displays an image corresponding to the display signal on the display panel 701.
- the CPU 601 selects a selected video signal from a circuit (one of the signal determination monitoring circuit 302 and the fixed signal line monitoring holding circuit 303) associated with the input terminal indicated by the selection instruction. Read type information.
- the CPU 601 determines the type of the selected video signal based on the type information, and sets the resolution conversion data, the aspect ratio, and the color system in the scaler circuit 501 according to the determination result.
- the CPU 601 reads the type information regarding the terminal IN2 from the signal discrimination monitoring circuit 302, determines the type of the selected video signal based on the type information, and based on the determination result.
- the resolution conversion data, the aspect ratio, and the color system are set in the scaler circuit 501. Note that the type determination method performed by the CPU 601 using the DE signal and AVI info frame information conforms to the HDMI standard.
- the CPU 601 When the selected terminal is the display port 105, the CPU 601 reads the type information related to the terminal IN5 from the signal discrimination monitoring circuit 302, determines the type of the selected video signal based on the type information, and based on the determination result. Thus, the resolution conversion data, the aspect ratio, and the color system are set in the scaler circuit 501. Note that the type determination method performed by the CPU 601 using the DE signal and DPCD information conforms to the display port standard.
- the CPU 601 reads the type information regarding the terminal IN3 from the signal discrimination monitoring circuit 303, determines the type of the selected video signal based on the type information, and based on the determination result,
- the resolution conversion data, aspect ratio, and color system are set in the scaler circuit 501.
- the resolution conversion data is set according to the number of video lines, and the aspect ratio and the color system are set to 4: 3 and YUV signals, respectively.
- the CPU 601 reads the type information regarding the terminal IN3 from the signal discrimination monitoring circuit 303, determines the type of the selected video signal based on the type information, and based on the determination result,
- the resolution conversion data, aspect ratio, and color system are set in the scaler circuit 501.
- the resolution conversion data is set according to the number of video lines, and the aspect ratio and the color system are set to 4: 3 and YUV signals, respectively.
- the CPU 601 reads the type information regarding the terminal IN4 from the signal discrimination monitoring circuit 303, determines the type of the selected video signal based on the type information, and based on the determination result.
- the resolution conversion data, the aspect ratio, and the color system are set in the scaler circuit 501.
- the resolution conversion data is set as a default
- the aspect ratio is set according to the resolution of the display panel 701
- the color system is set as an RGB signal.
- the CPU 601 reads the type information related to the terminal IN4 from the signal discrimination monitoring circuit 303, determines the type of the selected video signal based on the type information, and based on the determination result,
- the resolution conversion data, aspect ratio, and color system are set in the scaler circuit 501.
- the resolution conversion data is set as a default
- the aspect ratio is set according to the resolution of the display panel 701
- the color system is set as an RGB signal.
- the detection holding circuit 301b determines the horizontal synchronization frequency, the vertical synchronization frequency, and the total number of lines from the horizontal synchronization signal and the vertical synchronization signal included in the video signal. , Sync polarity, sync type, scan type, vertical sync width, and number of effective video lines are detected as type information, and the detection result is held.
- the detection holding circuit 301b detects the horizontal signal included in the video signal input after the all black detection circuit 301a detects the all black signal. From the sync signal and vertical sync signal, the horizontal sync frequency, vertical sync frequency, total number of lines, sync polarity, sync type, scan type, vertical sync width, and number of valid video lines are detected as type information, and the detection results Is held instead of the already held detection result.
- the signal discrimination monitoring circuit 301 Each time the signal discrimination monitoring circuit 301 holds the detection result, the signal discrimination monitoring circuit 301 outputs a first detection signal indicating that the signal discrimination monitoring circuit 301 holds the detection result to the CPU 601.
- the CPU 601 When the CPU 601 receives the first detection signal, the CPU 601 reads the detection result (type information) from the signal discrimination monitoring circuit 301, sets the frequency division ratio and phase of the A / D converter 201 based on the detection result, and executes the computer.
- the A / D converter 201 is caused to execute an operation suitable for the analog video signal received by the terminal 101.
- the signal discrimination monitoring circuit 302 is a terminal connected to the signal discrimination monitoring circuit 302 at a monitoring timing (this monitoring timing can be arbitrarily set) designated by the CPU 601 when the selection terminal is neither the HDMI terminal 102 nor the display port terminal 105. Are switched between terminal IN2 and terminal IN5.
- the detection holding circuit 301b determines the horizontal synchronization frequency, the vertical synchronization frequency, and the total number of lines from the horizontal synchronization signal and the vertical synchronization signal included in the video signal.
- the sync polarity, the sync type, the scan type, the vertical sync width, and the number of effective video lines are detected as type information related to the terminal IN2, and the detection result (type information related to the terminal IN2) is held.
- the DE detection holding circuit 302a detects the DE signal included in the video signal from the terminal IN2 as type information regarding the terminal IN2, and holds the detection result.
- the AVI info frame detection / holding circuit 302b detects the AVI info frame included in the video signal from the terminal IN2 as type information regarding the terminal IN2, and holds the detection result.
- the detection holding circuit 301b is input from the terminal IN2 after detecting the all black signal.
- the detection result (type information related to terminal IN2) is held instead of the type information related to terminal IN2 that has already been held.
- the DE detection holding circuit 302a detects the DE signal included in the video signal subsequently input from the terminal IN2 as type information regarding the terminal IN2, and the detection result Is stored instead of the detection result (type information related to the terminal IN2) that has already been held.
- the AVI info frame detection holding circuit 302b detects the AVI info frame included in the video signal input from the terminal IN2 thereafter, and the detection result is already Hold instead of the held detection result (type information related to terminal IN2).
- the signal discrimination monitoring circuit 302 outputs a second detection signal indicating that the AVI info frame detection holding circuit 302b holds the detection result to the CPU 601.
- the CPU 601 When the CPU 601 receives the second detection signal, the CPU 601 reads the detection result (type information regarding the terminal IN2) from the DE detection circuit 302 and the AVI info frame detection holding circuit 302b, and based on the detection result, the operation of the HDMI receiver 202 (for example, , The operation for determining the frame) is set, and the HDMI receiver 202 is caused to execute an operation suitable for the HDMI signal received by the HDMI terminal 121.
- the detection result type information regarding the terminal IN2
- the AVI info frame detection holding circuit 302b the operation of the HDMI receiver 202 (for example, , The operation for determining the frame) is set, and the HDMI receiver 202 is caused to execute an operation suitable for the HDMI signal received by the HDMI terminal 121.
- the detection holding circuit 301b when a video signal is input from the terminal IN5, the detection holding circuit 301b generates a horizontal synchronization frequency, a vertical synchronization frequency, a total synchronization frequency from a horizontal synchronization signal and a vertical synchronization signal included in the video signal.
- the number of lines, the synchronization polarity, the synchronization type, the scan type, the vertical synchronization width, and the number of effective video lines are detected as type information related to the terminal IN5, and the detection result (type information related to the terminal IN5) is held.
- the DE detection holding circuit 302a detects the DE signal included in the video signal from the terminal IN5 as type information regarding the terminal IN5, and holds the detection result.
- the DPCD detection holding circuit 302c detects DPCD included in the video signal from the terminal IN5 as type information regarding the terminal IN5, and holds the detection result.
- the detection holding circuit 301b is input from the terminal IN5 after detecting the all black signal.
- the detection result (type information related to the terminal IN5) is held instead of the type information related to the terminal IN5 that has already been held.
- the DE detection holding circuit 302a detects the DE signal included in the video signal from the subsequent terminal IN5 as the type information regarding the terminal IN5, and the detection result is Hold instead of the detection result (type information related to terminal IN5) that has already been held.
- the DPCD detection holding circuit 302c detects DPCD included in the video signal from the subsequent terminal IN5 as type information regarding the terminal IN5, and the detection result (DPCD) Is held instead of the already held detection result (type information regarding the terminal IN5).
- the signal discrimination monitoring circuit 302 outputs a third detection signal indicating that the DPCD detection holding circuit 302c holds the detection result to the CPU 601.
- the CPU 601 When the CPU 601 receives the third detection signal, the CPU 601 reads the detection result (type information regarding the terminal IN5) from the DPCD detection holding circuit 302c, and based on the detection result, the operation of the display port receiver 205 (for example, the operation of determining the frame) ) To cause the display port receiver 205 to execute an operation suitable for the display port signal received by the display port terminal 105.
- the detection result type information regarding the terminal IN5
- the operation of the display port receiver 205 for example, the operation of determining the frame
- the fixed signal line monitoring and holding circuit 303 is a monitoring timing instructed by the CPU 601 when the selection terminal is not the S terminal 103, the composite terminal 106, the RJ-45 terminal 107, or the USB terminal 104 (this monitoring timing is arbitrarily set)
- the terminal connected to the fixed signal line monitoring and holding circuit 303 is switched between the terminal IN3 and the terminal IN4.
- the fixed signal line monitoring and holding circuit 303 While connected to the terminal IN3, the fixed signal line monitoring and holding circuit 303 periodically detects the number of video lines as type information related to the terminal IN3 from the horizontal synchronizing signal and the vertical synchronizing signal included in the video signal from the terminal IN3. Then, the detection result (type information regarding the terminal IN3) is held. Note that the fixed signal line monitoring holding circuit 303 holds only the type information related to the latest terminal IN3.
- the fixed signal line monitoring and holding circuit 303 Each time the fixed signal line monitoring and holding circuit 303 holds the latest type information regarding the terminal IN3, the fixed signal line monitoring and holding circuit 303 outputs a fourth detection signal indicating that the fixed signal line monitoring and holding circuit 303 holds the type information regarding the terminal IN3 to the CPU 601. .
- the CPU 601 When the CPU 601 receives the fourth detection signal, the CPU 601 reads the type information related to the terminal IN3 from the fixed signal line monitoring and holding circuit 303, and sets the operation of the video decoder 203 (for example, the operation of determining the frame) based on the detection result. Then, the video decoder 203 is caused to execute an operation suitable for the video signal received by the S terminal 103 or the composite terminal 106.
- the fixed signal line monitoring and holding circuit 303 periodically determines the number of video lines from the horizontal synchronization signal and the vertical synchronization signal included in the video signal from the terminal IN4 while being connected to the terminal IN4, and the type information regarding the terminal IN4. And the detection result (type information regarding the terminal IN4) is held. Note that the fixed signal line monitoring and holding circuit 303 holds only the type information related to the latest terminal IN4.
- the CPU 601 sets the display signal to a fixed value in the scaler circuit 501, and changes the display video to a predetermined video (for example, a blue-black video). Or an instruction to freeze (freeze) the display video to the scaler circuit 501.
- a predetermined video for example, a blue-black video
- the scaler circuit 501 displays a predetermined image (for example, a blue black image) on the display panel 701 or stops the display image on the display panel 701 in accordance with an instruction from the CPU 601.
- a predetermined image for example, a blue black image
- the CPU 601 displays the type information of the selected video signal received at the input terminal (selection terminal) indicated by the selection instruction as the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring holding circuit 303. Read from either.
- the CPU 601 sets resolution conversion data, an aspect ratio, and a color system in the scaler circuit 501 based on the type information.
- the CPU 601 connects the scaler circuit 501 with the circuit from which the type information of the selected video signal is read out of the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring holding circuit 303, and selects the selected video signal. Is output to the scaler circuit 501.
- the CPU 601 indicates a connection instruction to connect the scaler circuit 501 with the circuit from which the type information of the selected video signal is read out of the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring holding circuit 303.
- a connection instruction to connect the scaler circuit 501 with the circuit from which the type information of the selected video signal is read out of the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring holding circuit 303.
- the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring and holding circuit 303 set the connection relationship with the scaler circuit 501 in accordance with the connection instruction.
- the CPU 601 connects the terminal IN2 to the signal discrimination monitoring circuit 302 and fixes the connection until the selection terminal is switched.
- the CPU 601 sets the timing of connecting the terminal IN2 to the signal discrimination monitoring circuit 302 as the timing synchronized with the vertical synchronization timing of the HDMI video signal.
- the CPU 601 connects the terminal IN5 to the signal discrimination monitoring circuit 302 and fixes the connection until the selection terminal is switched.
- the CPU 601 sets the timing of connecting the terminal IN5 to the signal discrimination monitoring circuit 302 as the timing synchronized with the vertical synchronization timing of the DP video signal.
- the CPU 601 connects the terminal IN3 to the fixed signal line monitoring and holding circuit 303, and fixes the connection until the selection terminal is switched.
- the CPU 601 sets the timing of connecting the terminal IN3 to the fixed signal line monitoring and holding circuit 303 as the timing synchronized with the vertical synchronization timing of the selected video signal.
- the CPU 601 connects the terminal IN4 to the fixed signal line monitoring and holding circuit 303, and fixes the connection until the selection terminal is switched.
- the CPU 601 sets the timing of connecting the terminal IN4 to the fixed signal line monitoring and holding circuit 303 as the timing synchronized with the vertical synchronization timing of the selected video signal.
- the scaler circuit 501 generates a display signal by performing image processing according to the setting by the CPU 601 on the selected video signal.
- the scaler circuit 501 When the scaler circuit 501 generates a display signal, the scaler circuit 501 cancels the display of a predetermined video (for example, a blue-black video) or the static state of the video, and displays the video corresponding to the display signal on the display panel 701.
- a predetermined video for example, a blue-black video
- each of the signal discrimination monitoring circuit 301, the signal discrimination monitoring circuit 302, and the fixed signal line monitoring holding circuit 303 included in the video signal monitoring device is based on the video signal received by the input terminal corresponding to itself.
- the type information is detected and the detection result is held. Therefore, a plurality of video signals can be received at the same time, and the type information can be detected simultaneously from each of the plurality of video signals.
- the signal discrimination monitoring circuit 301 detects the horizontal synchronization frequency, the vertical synchronization frequency, the total number of lines, the synchronization polarity, the synchronization type, the scan type, the vertical synchronization signal width, and the number of video lines as type information. Holds detection results.
- the signal discrimination monitoring circuit 302 includes feature information (AVI info frame and / or DPCD), DE signal, horizontal sync frequency, vertical sync frequency, total number of lines, sync polarity, sync type, scan type, vertical sync signal width, and video line. The number is detected as type information, and the detection result is held.
- the fixed signal line monitoring and holding circuit 303 detects the number of video lines as type information and holds the detection result. Therefore, a monitoring circuit suitable for the input terminal is provided, and appropriate type information can be detected according to the type of the video signal.
- the processing unit 500 when the selection instruction is received, specifies a monitoring circuit (selection detection unit) corresponding to the selection terminal specified by the selection instruction, and uses the detection result in the monitoring circuit.
- a display signal is generated by performing corresponding image processing on the selected video signal.
- the display unit panel 701 displays an image corresponding to the display signal generated by the processing unit 500.
- the type information is detected before the selection instruction for switching the display image is received, it is possible to prevent the type information from being detected after the selection instruction is received, and the display is performed after the selection instruction is received. It is possible to shorten the time until the video is switched.
- the setting of the A / D converter 201, the setting of the HDMI receiver 202, the setting of the video decoder 203, and the setting of the display port receiver 205 can be performed before switching the input terminal by the selection instruction. Therefore, among the A / D converter 201, the HDMI receiver 202, the video decoder 203, and the display port receiver 205, a device corresponding to the input terminal after switching is newly set according to the switching of the input terminal. It becomes possible to prevent that.
- the display video is changed to the blue-black video.
- the processing unit 500 when the selection instruction is received, the processing unit 500 is an image corresponding to the detection result in the monitoring circuit corresponding to the selection terminal at a timing synchronized with the vertical synchronization timing of the selected video signal. An operation of generating a display signal by performing processing on the selected video signal is started. For this reason, it is possible to switch the display video seamlessly without disturbing the video.
- the S terminal 103 and the composite terminal 106 are connected to the video decoder 203, and the USB terminal 104 and the RJ-45 terminal 107 are connected to the terminal IN4, but the S terminal 103 is connected to the video decoder 203.
- the composite terminal 106 may be connected, and either the USB terminal 104 or the RJ-45 terminal 107 may be connected to the terminal IN4.
- the illustrated configuration is merely an example, and the present invention is not limited to the configuration.
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Abstract
Description
102 HDMI端子
103 S端子
104 USB端子
105 ディスプレイポート端子
106 コンポジット端子(RCA端子)
107 RJ-45端子
201 A/Dコンバータ
202 HDMIレシーバ
203 ビデオデコーダ
205 ディスプレイポートレシーバ
IN1~IN5 端子
300 監視部
301 信号判別監視回路
302 信号判別監視回路
303 固定信号ライン監視回路
400 受付部
500 処理部
501 スケーラー回路
601 CPU
701 表示パネル 101 Computer terminal (D terminal)
102 HDMI terminal 103 S terminal 104
107 RJ-45 terminal 201 A /
701 Display panel
Claims (6)
- 複数の映像信号を受け付ける複数の入力端子と、
前記複数の入力端子と対応づけられ、自己に対応する入力端子が受け付けた映像信号から該映像信号の種別を特定するための種別情報を検出し、その検出結果を保持する複数の検出手段と、を含む映像信号監視装置。 A plurality of input terminals for receiving a plurality of video signals;
A plurality of detection means associated with the plurality of input terminals, detecting type information for specifying the type of the video signal from the video signal received by the input terminal corresponding to the self, and holding the detection result; Including a video signal monitoring device. - 請求項1に記載の映像信号監視装置において、
前記複数の入力端子は、
アナログ映像信号を受け付ける第1端子と、
自映像信号の特徴を示す特徴情報とデータイネーブル信号とを含むデジタル映像信号を受け付ける第2端子と、
映像ライン数にて種別を特定可能な所定映像信号を受け付ける第3端子と、を含み、
前記複数の検出手段は、
前記第1端子と対応づけられ、該第1端子が受け付けたアナログ映像信号から、水平同期周波数と垂直同期周波数と総ライン数と同期極性と同期タイプとスキャンタイプと垂直同期信号幅と映像ライン数とを前記種別情報として検出し、該検出結果を保持する第1検出手段と、
前記第2端子と対応づけられ、該第2端子が受け付けたデジタル映像信号から、前記特徴情報と前記データイネーブル信号と水平同期周波数と垂直同期周波数と総ライン数と同期極性と同期タイプとスキャンタイプと垂直同期信号幅と映像ライン数とを前記種別情報として検出し、該検出結果を保持する第2検出手段と、
前記第3端子と対応づけられ、該第3端子が受け付けた所定映像信号から、映像ライン数を前記種別情報として検出し、該検出結果を保持する第3検出手段と、を含む、映像信号監視装置。 The video signal monitoring apparatus according to claim 1,
The plurality of input terminals are:
A first terminal for receiving an analog video signal;
A second terminal for receiving a digital video signal including feature information indicating characteristics of the own video signal and a data enable signal;
A third terminal for receiving a predetermined video signal whose type can be specified by the number of video lines,
The plurality of detection means include
From the analog video signal associated with the first terminal and received by the first terminal, the horizontal synchronization frequency, the vertical synchronization frequency, the total number of lines, the synchronization polarity, the synchronization type, the scan type, the vertical synchronization signal width, and the number of video lines And first detection means for holding the detection result,
The feature information, the data enable signal, the horizontal synchronization frequency, the vertical synchronization frequency, the total number of lines, the synchronization polarity, the synchronization type, and the scan type, from the digital video signal associated with the second terminal and received by the second terminal Second detection means for detecting the vertical synchronization signal width and the number of video lines as the type information and holding the detection result;
Video signal monitoring, comprising: third detection means associated with the third terminal and detecting the number of video lines as the type information from the predetermined video signal received by the third terminal and holding the detection result apparatus. - 請求項2に記載の映像信号監視装置において、
前記種別は、映像信号の色表現形式と解像度の組み合わせにて特定され、
前記第3端子は、NTSC方式に準拠した映像信号、PAL方式に準拠した映像信号およびSECAM方式に準拠した映像信号のいずれかを受け付ける端子、または、前記映像信号監視装置に接続され前記複数の映像信号から選択された映像信号に応じた映像を表示する表示パネルが有する解像度を有しかつ所定の色表現形式が用いられた映像信号を受け付ける端子である、映像信号監視装置。 The video signal monitoring apparatus according to claim 2,
The type is specified by a combination of color representation format and resolution of the video signal,
The third terminal is a terminal that accepts one of a video signal conforming to the NTSC system, a video signal conforming to the PAL system, and a video signal conforming to the SECAM system, or connected to the video signal monitoring apparatus and the plurality of video signals. A video signal monitoring apparatus, which is a terminal that receives a video signal having a resolution and having a predetermined color expression format that is included in a display panel that displays a video corresponding to a video signal selected from the signal. - 請求項2または3に記載の映像信号監視装置において、
前記第2端子は、前記特徴情報としてAVIインフォフレームを有するHDMI規格に準拠したデジタル映像信号を受け付けるHDMI端子、または、前記特徴情報としてディスプレイポートコンフィグレーションデータを有するディスプレイポート規格に準拠したデジタル映像信号を受け付けるディスプレイポート端子である、映像信号監視装置。 In the video signal monitoring apparatus according to claim 2 or 3,
The second terminal receives an HDMI standard-compliant digital video signal having an AVI info frame as the feature information, or a digital video signal compliant with a display port standard having display port configuration data as the feature information A video signal monitoring device, which is a display port terminal that accepts images. - 請求項1から4のいずれか1項に記載の映像信号監視装置と、
前記複数の入力端子のうち、前記複数の映像信号のいずれかである選択映像信号を受け付けている選択端子を特定するための選択指示を受け付ける受付手段と、
前記選択指示が受け付けられた場合に、前記複数の検出手段のうち前記選択端子に対応する選択検出手段を特定し、該選択検出手段内の検出結果に応じた画像処理を前記選択映像信号に行って表示信号を生成する処理手段と、
前記表示信号に応じた映像を表示する表示手段と、を含む映像表示装置。 The video signal monitoring device according to any one of claims 1 to 4,
A receiving unit that receives a selection instruction for specifying a selection terminal that receives a selection video signal that is one of the plurality of video signals among the plurality of input terminals;
When the selection instruction is accepted, a selection detection unit corresponding to the selection terminal is specified from the plurality of detection units, and image processing corresponding to a detection result in the selection detection unit is performed on the selected video signal. Processing means for generating a display signal,
Display means for displaying an image corresponding to the display signal. - 請求項5に記載の映像表示装置において、
前記処理手段は、前記選択指示が受け付けられた場合に、前記選択映像信号の垂直同期のタイミングに同期したタイミングで、前記選択検出手段内の検出結果に応じた画像処理を前記選択映像信号に行って前記表示信号を生成する動作を開始する、映像表示装置。 The video display device according to claim 5,
When the selection instruction is accepted, the processing means performs image processing on the selected video signal according to a detection result in the selection detection means at a timing synchronized with a timing of vertical synchronization of the selected video signal. A video display device that starts an operation of generating the display signal.
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