CN107295407B - Apparatus for determining the source of a failure of a VBO signal - Google Patents
Apparatus for determining the source of a failure of a VBO signal Download PDFInfo
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- CN107295407B CN107295407B CN201710657757.1A CN201710657757A CN107295407B CN 107295407 B CN107295407 B CN 107295407B CN 201710657757 A CN201710657757 A CN 201710657757A CN 107295407 B CN107295407 B CN 107295407B
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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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4424—Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used
-
- 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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4425—Monitoring of client processing errors or hardware failure
Abstract
The invention provides a device for determining a fault source of a VBO signal, which comprises a detection chip, a signal input interface and a display screen interface, wherein the signal input interface and the display screen interface are connected with the detection chip, the signal input interface is used for receiving the VBO signal sent by a front-end video decoding chip, the display screen interface is used for sending the VBO signal to a display screen, the detection chip is used for analyzing the received VBO signal and determining that the fault source of the VBO signal is the front-end video decoding chip when an analysis result is matched with a preset parameter, otherwise, the fault source is determined to be the display screen, the detection device is deployed between the VBO signal input and the VBO signal output of a television to rapidly determine the fault source of the VBO signal, no special is needed, fault detection is respectively carried out by a front-end signal processing factory and a display screen factory, and the detection efficiency is greatly improved.
Description
Technical Field
The embodiment of the invention relates to the television technology, in particular to devices for determining the fault source of a VBO signal.
Background
With the development of television technology, 4K (resolution 4096 × 2160) high-definition televisions are becoming more popular, and with the popularization of 4K televisions, high-definition digital display interface signals, such as V-BY-one (VBO) signals, are becoming more wide, and it is becoming more important to detect input and output of VBO signals.
Problems of screen splash, screen blacking, incomplete image display, picture jitter and the like can occur due to the VBO signal fault, but the VBO signal fault is caused by a plurality of factors, and can be a fault of a front-end video decoding main Chip (SoC for short) or a fault of a display screen. In the prior art, the SoC and the display screen are required to perform fault determination respectively, and particularly, different suppliers may be required to perform fault determination.
However, the VBO signal failure determination by the conventional method takes a long time and the progress of failure processing is slow.
Disclosure of Invention
The embodiment of the invention provides devices for determining the source of the VBO signal fault, which are used for detecting the input and output faults of the VBO signal.
The th aspect of the embodiment of the invention provides devices for determining the source of a VBO signal fault, which comprise a detection chip, a signal input interface and a display screen interface;
the signal input interface and the display screen interface are both connected with the detection chip;
the signal input interface is used for receiving a VBO signal sent by the front-end video decoding chip;
the display screen interface is used for sending the VBO signal to a display screen;
the detection chip is used for analyzing the received VBO signal, and when the analysis result is matched with the preset parameter, determining that the fault source of the VBO signal is the front-end video decoding chip, otherwise, determining that the fault source is the display screen.
Optionally, the detection chip includes:
status register for analyzing the VBO signal and updating the value of the status register according to the analysis result;
and the processing module is used for judging whether the value of the th status register is the same as a preset parameter or not, determining that the fault source of the VBO signal is the front-end video decoding chip when the value of the th status register is the same as the preset parameter, and otherwise, determining that the fault source is the display screen.
Optionally, the th status register is any of:
the video receiving locking signal register is used for analyzing whether the video receiving channel is locked or not according to the VBO signal;
the menu receiving locking signal register is used for analyzing whether a menu receiving channel is locked or not according to the VBO signal;
the video receiving controller stability analysis register is used for analyzing whether the th signal to be tested received by the video receiving channel is stable or not according to the VBO signal, wherein the th signal to be tested comprises at least items of pixel signals, field synchronizing signals, line synchronizing signals and effective display data strobe signals in the video signals;
and the menu receiving controller stabilization analysis register is used for analyzing whether a second signal to be tested received by the menu receiving channel is stable or not according to the VBO signal, wherein the second signal to be tested comprises at least items of pixel signals, field synchronization signals, line synchronization signals and effective display data strobe signals in the menu signal.
Optionally, the detection chip further includes a second status register, configured to receive a lock signal fed back by the display screen, and determine whether the video output channel is locked according to the lock signal.
Optionally, the detection chip is further configured to output at least of the following signals to an external oscilloscope, the clock signal, the field synchronization signal, the line synchronization signal, and the valid display data strobe signal.
Optionally, the analysis result is a polarity of the VBO signal or a partition of the VBO signal.
Optionally, the device further includes an external interface, configured to receive a fault source sent by the detection chip, and send the fault source to an external display device.
Optionally, the front-end video decoding chip is an SoC chip.
In the device for determining the fault source of the VBO signal, the detection chip analyzes the VBO signal sent by the front-end video decoding chip, and determines that the fault source of the VBO signal is the front-end video decoding chip when the analysis result is matched with the preset parameter, otherwise, determines that the fault source is the display screen.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, is briefly introduced in the drawings required in the description of the embodiments or the prior art, it is obvious that the drawings in the following description are embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of an apparatus for determining a source of a VBO signal fault according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an apparatus for determining a source of a VBO signal according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of an output information display interface of an apparatus for determining a source of a VBO signal according to another embodiment of the invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete description of the technical solutions of the embodiments of the present invention will be given below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are partial embodiments of of the present invention, rather than all embodiments.
Embodiments of the present invention provide apparatuses for determining a source of a VBO signal failure, which are connected between a VBO signal input and a display screen of a tv set, to quickly determine a cause of the VBO signal failure, is generally applicable to a development stage of the tv set, but not limited thereto, and may also detect the VBO signal failure in a later maintenance.
Fig. 1 is a schematic structural diagram of an apparatus for determining a source of a VBO signal fault according to an embodiment of the present invention, and as shown in fig. 1, the apparatus includes a detection chip 01, a signal input interface 02, and a display screen interface 03.
The signal input interface 02 and the display screen interface 03 are both connected with the detection chip 01.
And the signal input interface 02 is used for receiving a VBO signal sent by the front-end video decoding chip.
And the display screen interface 03 is used for sending the VBO signal to the display screen. That is, the device can be connected between a front-end video decoding chip and a display screen in a television.
And the detection chip 01 is used for analyzing the received VBO signal, and determining that the fault source of the VBO signal is a front-end video decoding chip when the analysis result is matched with the preset parameter, or determining that the fault source is a display screen.
It should be noted that parameter values corresponding to various fault sources may be preset, and if the analysis result is the same as the preset parameter value or falls within the range of the preset parameter, the detection chip 01 may determine that the fault source of the VBO signal is a front-end video decoding chip.
Alternatively, for the input side of the VBO signal, the above-mentioned detection chip 01 is compatible with the VBO signal output of the standards such as 4Kx2K @60 hertz (hz), 4Kx2K @60/120hz, and the like. For the output side of the VBO signal, the detection chip 01 is compatible with a 4K display screen. That is, the detection Chip 01 can be compatible with all 4K System on Chip (SoC) schemes and 4K display screens supporting VBO standard protocol interfaces, but not limited thereto. Correspondingly, the front-end video decoding chip may be an SoC chip, and the display screen may be a 4K display screen.
Alternatively, the detection chip 01 may be a Frame Rate Conversion (FRC) chip.
The VBO signal output interface of the television can be arranged on the SoC, the SoC is audio and video decoding chips, and the VBO signals are decoded and then output to the display screen.
In the embodiment, the detection chip analyzes the VBO signal sent by the front-end video decoding chip, and when the analysis result is matched with the preset parameter, the fault source of the VBO signal is determined to be the front-end video decoding chip, otherwise, the fault source is determined to be the display screen.
The signal input interface 02 may include an 8-channel (lane) video receiving channel, which is supported upwards to 4Kx2K @60hz, and may further include a 4lane menu (OSD) receiving channel, that is, the signal input interface 02 may support a scheme in which the front-end SoC outputs the video and the menu separately, and of course, may also be compatible with a scheme in which the video and the menu are output, which is not limited in the embodiment of the present invention.
The display screen interface 03 can comprise a 16lane signal output channel, and the 8lane 4Kx2K @60hz output and the 16lane 4Kx2K @120hz output are supported upwards.
, the detecting chip 01 includes a status register and a processing module, specifically, a status register is used to analyze the VBO signal and update the value of the status register according to the analysis result.
And the processing module is used for judging whether the value of the th status register is the same as the preset parameter or not, determining that the fault source of the VBO signal is a front-end video decoding chip when the value of the th status register is the same as the preset parameter, and otherwise, determining that the fault source is the display screen.
It should be noted that, different types of faults detected by different status register analyses may be different, and status registers with different functions may be preconfigured.
In a specific implementation process, the th status register may include any one of 1:
1) and a Video receiving locking signal register (Video _ RX _ lock (r)) for analyzing whether the Video receiving channel is locked according to the VBO signal.
Specifically, the video receiving lock signal register may obtain the video signal in the VBO signal through the video receiving channel of the signal input interface 02, and update the value of the video receiving lock signal register through analysis to indicate whether the video receiving channel is locked.
2) And the menu receiving locking signal register (OSD RX Lock (R)) is used for analyzing whether the menu receiving channel is locked or not according to the VBO signal.
The menu reception lock signal register may obtain a menu signal in the VBO signal through a menu reception channel of the signal input interface 02, and update a value of the menu reception lock signal register by analysis to indicate whether the video reception channel is locked.
3) And the Video receiving controller stability analysis register (Video RX Ctrl Stable (R)) is used for analyzing whether the signal to be tested received by the Video receiving channel is Stable or not according to the VBO signal.
The signal set to be measured comprises at least items of pixel (pixel) signals, field synchronization (VS) signals, line synchronization (HS) signals, effective display data strobe (DE) signals and the like in video signals.
The values of the video receiving controller stability analysis registers are used to indicate whether these signals are stable.
4) And the menu receiving controller stability analysis register (OSD RX Ctrl Stable (R)) is used for analyzing whether the second signal to be tested received by the menu receiving channel is Stable or not according to the VBO signal.
Wherein the second signal under test may comprise at least items of a pixel signal, a VS signal, an HS signal, a DE signal, etc. in the menu signal.
The value of the menu reception controller stability analysis register is used to indicate whether these signals are stable.
5) And a Video receiving controller state analysis register (Video RX Ctrl Status (R)) for analyzing the clock information of the Video receiving channel according to the VBO signal.
Specifically, the value of the video receive controller state analysis register may represent clock (timing) information of the video signal received by the video receive channel.
6) And the menu receiving controller state analysis register (OSD RX Ctrl Status (R)) is used for analyzing the clock information of the menu receiving channel according to the VBO signal.
Specifically, the value of the menu reception controller state analysis register may represent timing information of the menu signal received by the menu reception channel.
Optionally, the method may further include: the fault removal register can be specifically divided into a video fault removal register and a menu fault removal register according to a receiving channel of the VBO signal. Examples include: a video signal receiving boundary register, a signal path error register, etc. can determine whether the signal has errors according to the received VBO signal, for example, the partition of the VBO signal does not meet the requirement of the partition of the display screen, or the polarity of the VBO signal does not meet the requirement of the partition of the display screen.
For example, the screen display is incomplete, and some areas from left to right are displayed incorrectly, and may be video channel signal errors, the channel of the troubleshooting register is configured to judge whether the video channel is 8lane output or 16lane output, and the like.
In a specific implementation process, a tester can also obtain fault information by reading the value of the status register so as to analyze the fault reason of the VBO signal and quickly determine the fault. Specifically, it can be determined from these values whether the VBO signal meets the requirements of the display screen, such as the requirements of partition, polarity, etc.
Further , based on the above embodiment, the detecting chip may further include a second status register, which may be a video output Lock signal register (VBO TX Lock), for receiving a Lock signal fed back from the display screen and determining whether the video output channel is locked according to the Lock signal, and further may further analyze whether the output status of the VBO signal is stable.
The detection device is connected between a front-end video decoding chip and a display screen of the television, and transmits the decoded VBO signal to the display screen so that the display screen can display the decoded VBO signal, and the video output locking signal register can analyze whether the VBO signal transmitted on the output channel is stable or not.
FIG. 2 is a schematic diagram of an apparatus for determining a source of a VBO signal according to another embodiment of the present invention.
, the detecting chip is also used to output at least of clock signal, field synchronizing signal, line synchronizing signal and effective display data strobe signal to external oscilloscope.
Specifically, as shown in fig. 2, the detection chip may further include: and a fault elimination pin (Debug pin)04 for connecting an external oscilloscope.
In specific implementation, the Debug pin pulls out the required signal to the oscilloscope. The tester can determine whether the VBO signal is in fault and the fault reason according to the content displayed by the oscilloscope.
It should be noted that a plurality of fault-elimination pins, i.e. a plurality of test points, can be reserved on the detection chip according to the signals pulled out as required, so as to test different faults, for example, the following or more fault-elimination pins can be included:
1) and the video receiving signal fault clearing pin is used for pulling out the signal received by the video receiving channel in the VBO signal. For example, the video receiving channel receives: VS signal, HS signal, DE signal, etc.
2) And the menu receiving signal troubleshooting pin is used for pulling out a signal received by a menu receiving channel in the VBO signal. For example, the menu receiving channel receives: VS signal, HS signal, DE signal, etc.
3) And the clock signal fault removal pin is used for pulling out the recovered clock signal, namely the clock information of the VBO signal.
Of course, the pins are not limited to the above.
Optionally, the analysis result may be the polarity of the VBO signal or the partition of the VBO signal.
, the detecting chip 01 can also include a polarity status register 05 for analyzing the polarity of the VBO signal as shown in FIG. 2.
, the processing module may preset a polarity parameter of the display screen, determine whether the polarity indicated by the analysis result matches the preset polarity of the display screen, if not, determine that the source of the VBO signal is the front-end video decoding chip, and if so, determine that the source of the VBO signal is the display screen.
Optionally, the signal to be measured may also be pulled out to the oscilloscope by the Debug pin, and the polarity of the VBO signal is determined according to the waveform of the oscilloscope.
In the specific implementation process, the detection chip may have different working modes, for example: a Sync first-in first-out (Sync fifo) mode, an Auto-recovery (Auto de regen) mode, etc.
The sense chip may determine the polarity of the VBO signal in Sync fifo mode to further determine whether the VBO signal meets the polarity requirements of the display screen.
The detection chip can solve the DE signal in the VBO signal in the Auto DE regen mode, enables the rising edge of the DE signal to be opposite to the rising edge of the DE signal, and reads parameter information of the signal. These parameter information may include: line direction pixel position (hsize), line direction total number of pixels (htotal), line direction effective pixel (reactive), line direction start position (hstart), field direction pixel position (vsize), field direction total number of pixels (vtotal), field direction effective pixel (active), field direction start position (vstart), and the like.
The DE signal may be a DE signal obtained by a video receiving channel, or may be a DE signal obtained by a menu receiving channel, which is not limited herein.
The detection chip can reconstruct VS, HS and DE signals according to the parameter information of the signals, the reconstructed VS, HS and DE signals are less influenced by front-end signals, and the mutual position relation is convenient to debug.
The aforementioned status register can be analyzed by using reconstructed VS, HS, and DE signals, which is not specifically limited herein.
, the analysis result is the partition of the VBO signal, which can specifically refer to whether the analysis result is that the VBO signal input/output setting is wrong, for example, the set partition is not consistent with the actual partition of the display screen.
Optionally, the detection chip may further analyze the partition where the VBO signal is obtained, perform matching according to a preset display screen partition, determine that the source of the fault is a display screen if the partition of the VBO signal and the preset display screen partition are met, determine that the source of the fault of the VBO signal is the front-end video decoding chip if the partition of the VBO signal and the preset display screen partition are not , and further determine whether the partition setting is a problem by a tester according to an analysis result.
In another ways, the partition of VBO signal can be set to be equal to the partition of the display screen by detecting the chip setting, the set VBO signal is sent to the display screen to see whether the display screen displays correctly, if the VBO signal displays correctly, the fault source of the VBO signal is determined to be the front-end video decoding chip, and if the VBO signal displays incorrectly, the fault source is determined to be the display screen.
, it can also use the test signal of the graphics card (Pattern) generated by the test chip to judge whether the VBO signal decoded by the front-end video decoding chip is wrong or the display screen is faulty.
Specifically, the display screen interface 03 is further configured to receive a test card (Pattern) signal sent by the detection chip, and send the test card signal to a display screen of the television.
Specifically, different levels are Input to the detection chip through a General Purpose Input/Output interface (GPIO for short) or an analog to digital converter (ADC for short) to excite, and which test card signals correspond to the different levels received by the detection chip are set inside the detection chip, so as to further determine the cause of the failure in step .
, as shown in FIG. 2, the device may further include an external interface 06, such as a uart interface, for receiving the fault source sent by the detection chip and sending the fault source to an external display device, where the external display device may be a computer, a tablet computer, or the like, capable of viewing information, the external interface 06 receives the fault source sent by the detection chip and sends the fault source to the external display device, which displays the fault source on the external display device, so that the tester can visually view the detection result.
Alternatively, the detection chip may also read out the values of the above various registers by software driving according to the above, and transmit the values to an external display device through the external interface 06, so as to be displayed by the external display device.
FIG. 3 is a schematic diagram of an apparatus output information display interface for determining a source of a VBO signal according to another embodiment of the present invention, as shown in FIG. 3, which is a schematic diagram of an interface displayed by an external display apparatus.
Alternatively, the values of the status registers may be displayed by an external display device.
In the specific display, each register identifier is followed by a specific value, for example: the specific value of the register is displayed after the menu receives the lock signal register.
For video output, in addition to the "video output lock signal register," the "screen parameters" may also display or more settable screen parameters, such as setting information for resolution, front shoulder, back shoulder, synchronization signal (sync) width, etc. it is convenient for the tester to determine the requirements of the display screen for the received signals, such as partition, polarity, etc., based on these parameters.
Further , as shown in FIG. 3, it can also display "troubleshooting pin settings", specifically which troubleshooting pins are connected to the oscilloscope, etc.
The 'test chart' of the display interface can be used for displaying a test chart signal, so that a tester can conveniently determine the fault reason of the VBO signal according to the test chart signal.
The "operation mode" can be used to display the current operation mode of the detection chip, such as the aforementioned "Sync fifo mode", "Auto de regen mode", and the like.
The external interface connection can be used for displaying whether the external interface is correctly connected with an external display device or not. For example: and whether interfaces such as UART, IIC, GPIO and the like are connected correctly or not.
In this embodiment, through with the visual demonstration of various information to outside display device, can make things convenient for the tester to look over various detection data at any time in the testing process for the testing process is convenient high-efficient more.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
- A device for determining the source of VBO signal fault is characterized by comprising a detection chip, a signal input interface and a display screen interface;the signal input interface and the display screen interface are both connected with the detection chip;the signal input interface is used for receiving a VBO signal sent by the front-end video decoding chip;the display screen interface is used for sending the VBO signal to a display screen;the detection chip is used for analyzing the received VBO signal, and when the analysis result is matched with a preset parameter, determining that the fault source of the VBO signal is the front-end video decoding chip, otherwise, determining that the fault source is the display screen;wherein, the detection chip includes:status register for analyzing the VBO signal and updating the value of the status register according to the analysis result;and the processing module is used for judging whether the value of the th status register is the same as a preset parameter or not, determining that the fault source of the VBO signal is the front-end video decoding chip when the value of the th status register is the same as the preset parameter, and otherwise, determining that the fault source is the display screen.
- 2. The apparatus of claim 1, wherein the th status register is any of:the video receiving locking signal register is used for analyzing whether the video receiving channel is locked or not according to the VBO signal;the menu receiving locking signal register is used for analyzing whether a menu receiving channel is locked or not according to the VBO signal;the video receiving controller stability analysis register is used for analyzing whether the th signal to be tested received by the video receiving channel is stable or not according to the VBO signal, wherein the th signal to be tested comprises at least items of pixel signals, field synchronizing signals, line synchronizing signals and effective display data strobe signals in the video signals;and the menu receiving controller stabilization analysis register is used for analyzing whether a second signal to be tested received by the menu receiving channel is stable or not according to the VBO signal, wherein the second signal to be tested comprises at least items of pixel signals, field synchronization signals, line synchronization signals and effective display data strobe signals in the menu signal.
- 3. The apparatus of claim 1, wherein the detection chip further comprises a second status register for receiving a lock signal fed back from the display screen and determining whether the video output channel is locked according to the lock signal.
- 4. The device of claim 1, wherein the detection chip is further configured to output at least of a clock signal, a field sync signal, a line sync signal, and a valid display data strobe signal to an external oscilloscope.
- 5. The apparatus of claim 1, wherein the analysis result is a polarity of the VBO signal or a partition of the VBO signal.
- 6. The device according to any one of claims 1-5 and , further comprising an external interface for receiving a fault source sent by the detection chip and sending the fault source to an external display device.
- 7. The apparatus of claim 1, wherein the front-end video decoding chip is an SoC chip.
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| CN116959348B (en) * | 2023-09-19 | 2023-12-12 | 山东泰克信息科技有限公司 | Network data processing analysis method, device and storage medium |
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| CN201781562U (en) * | 2010-08-20 | 2011-03-30 | 康佳集团股份有限公司 | Television set for displaying line synchronization state |
| CN103051918A (en) * | 2011-10-12 | 2013-04-17 | 上海中铁通信信号测试有限公司 | Portable front-end video detector and detection method thereof |
| CN105611286A (en) * | 2016-02-18 | 2016-05-25 | 青岛海信电器股份有限公司 | Device and method for verifying function of video processing chip |
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| JP2008294887A (en) * | 2007-05-28 | 2008-12-04 | Funai Electric Co Ltd | Video recording device |
| CN201781562U (en) * | 2010-08-20 | 2011-03-30 | 康佳集团股份有限公司 | Television set for displaying line synchronization state |
| CN103051918A (en) * | 2011-10-12 | 2013-04-17 | 上海中铁通信信号测试有限公司 | Portable front-end video detector and detection method thereof |
| CN105611286A (en) * | 2016-02-18 | 2016-05-25 | 青岛海信电器股份有限公司 | Device and method for verifying function of video processing chip |
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