WO2022057221A1 - Dispositif récepteur et support de stockage non volatil - Google Patents

Dispositif récepteur et support de stockage non volatil Download PDF

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Publication number
WO2022057221A1
WO2022057221A1 PCT/CN2021/080504 CN2021080504W WO2022057221A1 WO 2022057221 A1 WO2022057221 A1 WO 2022057221A1 CN 2021080504 W CN2021080504 W CN 2021080504W WO 2022057221 A1 WO2022057221 A1 WO 2022057221A1
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WIPO (PCT)
Prior art keywords
signal
progressive
unit
progressive signal
interlaced
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PCT/CN2021/080504
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English (en)
Chinese (zh)
Inventor
阿部裕俊
本田雄一
田中昌美
Original Assignee
海信视像科技股份有限公司
东芝视频解决方案株式会社
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Application filed by 海信视像科技股份有限公司, 东芝视频解决方案株式会社 filed Critical 海信视像科技股份有限公司
Priority to CN202180001979.2A priority Critical patent/CN114514740A/zh
Publication of WO2022057221A1 publication Critical patent/WO2022057221A1/fr

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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
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level

Definitions

  • the present application relates to a receiving apparatus and a non-volatile storage medium.
  • the video signal input from a media package such as digital broadcasting and DVD is an interlaced scan (skip scan).
  • the display of the liquid crystal panel is a progressive scan (sequential scan) method. Therefore, an image format conversion technique for converting an interlaced signal (skip scan signal) of a video signal into a progressive signal (sequential scan signal) in an image processing circuit is known.
  • digital broadcasting is broadcasting using interlaced signals, and in network distribution via an IP network, it is often converted into progressive signals for distribution.
  • a method of generating a progressive signal from an interlaced signal some signal generation methods are known.
  • Patent Document 1 Japanese Patent Laid-Open No. 1999-126786
  • Patent Document 2 Japanese Patent Laid-Open No. 2009-267753
  • the problem to be solved by the present invention is to provide a receiving device and a non-volatile storage medium capable of performing image playback with high image quality for a progressive signal distributed over a network.
  • the receiving apparatus includes: a receiving unit that receives a progressive signal obtained by converting an interlaced signal; a line extraction processing unit that extracts lines constituting the received progressive signal; and an oblique direction interpolation unit , which interpolates pixels on the basis of observing (seeing) the correlation of pixels in the oblique direction with respect to the line-by-line signal obtained by extracting lines in the line extraction processing unit.
  • FIG. 1 is an example diagram showing a schematic configuration of a video transmission system according to the first embodiment
  • FIG. 2 is an exemplary block diagram showing the hardware configuration of the television apparatus
  • FIG. 3 is a diagram showing an example of a first progressive signal generation method
  • FIG. 4 is a diagram showing an example of a second progressive signal generation method
  • FIG. 5 is a diagram showing an example of the configuration of a signal processing unit of a television apparatus
  • FIG. 6 is a flowchart showing a flow of a series of processes for realizing image quality improvement by a signal processing unit of the television apparatus;
  • FIG. 7 is a diagram showing an example of the configuration of a signal processing unit of the television apparatus according to the second embodiment
  • FIG. 8 is a diagram showing an example of a configuration of a signal processing unit of a television apparatus according to a third embodiment
  • FIG. 9 is a diagram showing an example of the configuration of a signal processing unit of a television apparatus according to a fourth embodiment.
  • FIG. 1 is a diagram illustrating a schematic configuration of a video transmission system according to the first embodiment.
  • a video transmission system 1000 includes a transmitter 100 and a television apparatus 200 .
  • the television apparatus 200 is an example of a "receiver apparatus".
  • the transmitter 100 is connected to an IP (Internet Protocol) network 300 , and is configured to transmit an IP signal to the television apparatus 200 via the IP network 300 .
  • IP Internet Protocol
  • the transmitter 100 is installed in, for example, a broadcast station BS, and is configured to be able to transmit a broadcast signal to the television apparatus 200 .
  • the installation place of the transmitter 100 is not limited to the broadcasting station BS, and may be a CSP (Contents Service Provider) or the like.
  • the television apparatus 200 includes a display panel 210 capable of displaying a video image formed based on the broadcast signal and the IP signal received from the transmitter 100 .
  • FIG. 2 is an exemplary block diagram showing the hardware configuration of the television apparatus 200 .
  • the television device 200 includes an antenna 201 , an input terminal 202 a , a tuner 203 , a demodulator 204 , and a decoder 205 .
  • the antenna 201 is configured to receive a broadcast signal of digital broadcast and to supply the received broadcast signal to the tuner 203 via the input terminal 202a.
  • the tuner 203 is configured to select a broadcast signal of a desired channel based on the broadcast signal supplied from the antenna 201 , and to supply the selected broadcast signal to the demodulator 204 .
  • the demodulator 204 is configured to demodulate the broadcast signal supplied from the tuner 203 and supply the demodulated broadcast signal to the decoder 205 .
  • the decoder 205 is configured to separate the broadcast signal supplied from the demodulator 204 to decode the video signal and the audio signal, and to supply the decoded video signal and audio signal to the selector 207 described later.
  • the television device 200 also includes an analog signal input terminal 202b, a digital signal input terminal 202c, an A/D (analog/digital) converter 206, a selector 207, a signal processing unit 208, a speaker 209, and a display panel 210.
  • the analog signal input terminal 202b is configured to be connectable to the outside, and receives analog signals (video signals and audio signals) input from the outside.
  • the A/D converter 206 is configured to supply the selector 207 with a digital signal generated by performing A/D conversion on the analog signal supplied from the analog signal input terminal 202b.
  • the digital signal input terminal 202c is configured to be connectable to the outside, and receives digital signals (video signals and audio signals) input from the outside.
  • the selector 207 is configured to select one signal from a plurality of signals supplied from the decoder 205 , the A/D converter 206 and the input terminal 202 c and to supply the selected one signal to the signal processing unit 208 .
  • the signal processing unit 208 is configured to perform predetermined signal processing on the video signal supplied from the selector 207, and to supply the processed video signal to the display panel 210.
  • the signal processing unit 208 is configured to perform predetermined signal processing on the audio signal supplied from the selector 207 and supply the processed audio signal to the speaker 209 .
  • the speaker 209 is configured to output sound based on the sound signal supplied from the signal processing unit 208 .
  • the display panel 210 is configured to display video images such as still images and moving images based on video signals supplied from the signal processing unit 208 .
  • the television apparatus 200 includes an operation unit 211 , a light receiving unit 212 , an IP communication unit 213 , a control unit 214 , a memory 215 , and a storage 216 .
  • the operation unit 211 is configured to accept an operation input by a user.
  • the light receiving unit 212 is configured to receive infrared rays from the remote controller 250 for remotely operating the television apparatus 200 .
  • the IP communication unit 213 functions as a receiving unit, and is a communication interface for performing IP communication via the IP network 300 .
  • the control unit 214 is a microprocessor with a built-in CPU and the like, and controls each part of the television apparatus 200 .
  • the memory 215 includes a ROM that stores various computer programs executed by the CPU of the control unit 214 , a RAM that provides a work area to the CPU, and the like.
  • the memory 216 is configured to include an HDD (Hard Disk Drive), an SSD (Solid State Disk), or the like, and can record, for example, a signal selected by the selector 207 as recording data.
  • the video signal distributed from the transmitter 100 via the IP network 300 to the network may be a progressive signal (sequential scan signal) in addition to an interlaced signal (skip scan signal).
  • a progressive signal sequential scan signal
  • skip scan signal interlaced signal
  • terrestrial broadcasting is broadcasting using an interlaced signal, but in network distribution via the IP network 300, it is often converted into a progressive signal and distributed.
  • 1080i/60Hz which is an interlaced signal
  • 1080p/30Hz which is a progressive signal. Therefore, when terrestrial broadcast programs are distributed on the Internet, they are often distributed in 1080p/30Hz. .
  • FIG. 3 is a diagram showing an example of a first progressive signal generation method.
  • a 1080p/60Hz signal is generated by performing interlace-progressive conversion in accordance with motion on a 1080i/60Hz signal, which is an interlace signal.
  • a frame rate conversion process only one field information (frame) is enabled to generate a 1080p/30Hz progressive signal.
  • FIG. 4 is a diagram showing an example of a second progressive signal generation method.
  • a 1080p/60Hz signal is generated by performing interlace-progressive conversion on information of 540 lines in one field of a 1080i/60Hz signal, which is an interlace signal, by the scaling method.
  • a frame rate conversion process only one field information (frame) is enabled to generate a 1080p/30Hz progressive signal.
  • the progressive signal generated by the second signal generation method has a more pronounced jag-like display of oblique lines and a significant deterioration in image quality than that of the progressive signal generated by the first signal generation method.
  • the television apparatus 200 is configured to improve the image quality and improve the image quality for either of the progressive signal generated by the first signal generation method and the progressive signal generated by the second signal generation method.
  • the resulting video is displayed on the display panel 210 .
  • FIG. 5 is a diagram showing an example of the configuration of the signal processing unit 208 of the television apparatus 200 .
  • the signal processing unit 208 of the television apparatus 200 includes an interlace-progressive conversion unit (IP conversion unit) 2081, a line extraction processing unit 2082, an oblique direction interpolation unit 2083, a scaling processing unit 2084, and an image quality improvement unit 2082.
  • IP conversion unit interlace-progressive conversion unit
  • the interlace-progressive conversion unit 2081 performs interlace-progressive conversion to generate a 1080p/60Hz signal when, for example, a 1080i/60Hz signal as an interlace signal is distributed.
  • the line decimation processing unit 2082 executes a decimation process of extracting 1080 lines in one field by one line to obtain a 540p/30Hz signal when a 1080p/30Hz signal as a progressive signal is issued.
  • the oblique direction interpolation unit 2083 executes an oblique direction interpolation process within a frame in which appropriate pixels are interpolated while observing the correlation of the pixels in the oblique direction in order to eliminate the jagged display at the oblique edge to generate 1080 lines of 1080p/30Hz signal of the signal.
  • the scaling processing unit 2084 performs expansion processing on the 1080p/60 Hz signal converted by the interlace-progressive converting unit 2081 or the 1080p/30 Hz signal after the oblique direction interpolation unit 2083 has performed intra-frame oblique direction interpolation processing (1920). /1080 ⁇ 3840/2160).
  • the image quality improvement & frame rate conversion unit 2085 performs image quality improvement processing and conversion processing to the panel frequency (120 Hz) on the image that has been scaled by the scaling processing unit 2084 .
  • the signal processing unit 208 of the television apparatus 200 may be a microprocessor with a built-in CPU or the like.
  • the signal processing unit 208 can also function as a program by the CPU to realize the interlace-progressive conversion unit (IP conversion unit) 2081, the line extraction processing unit 2082, the oblique direction interpolation unit 2083, the scaling processing unit 2084, and the image quality improvement & frame frequency conversion unit 2085.
  • IP conversion unit interlace-progressive conversion unit
  • FIG. 6 is a flowchart showing a flow of a series of processes for realizing image quality improvement by the signal processing unit 208 of the television apparatus 200 .
  • the interlace-progressive conversion unit 2081 performs interlace-progressive conversion to generate a 1080p/60Hz signal This is output to the scaling processing unit 2084 (step S2).
  • step S3 when, for example, a 1080p/30 Hz signal as a progressive signal is issued (NO in step S1 ), whether by the first progressive signal generation method or the second progressive signal generation method
  • the line decimation processing unit 2082 performs decimation processing to obtain a 540p/30Hz signal by extracting 1080 lines in one field every other line in any of the generated progressive signals, and outputs it to the oblique direction interpolation unit 2083 (step S3).
  • the oblique direction interpolation unit 2083 executes an oblique direction interpolation process within a frame in which appropriate pixels are interpolated in view of the correlation of the pixels in the oblique direction to generate a 1080p/30 Hz signal as a signal of 1080 lines, and It is output to the scaling processing unit 2084 (step S4).
  • the scaling processing unit 2084 performs scaling on the 1080p/60 Hz signal converted by the interlace-progressive converting unit 2081 or the 1080p/30 Hz signal after the oblique direction interpolation unit 2083 has performed intra-frame oblique direction interpolation processing.
  • Process (1920/1080 ⁇ 3840/2160) step S5
  • output to the image quality improvement & frame rate conversion unit 2085 step S5
  • the image quality improvement & frame rate conversion unit 2085 performs image quality improvement processing and conversion processing to panel frequency conversion on the image subjected to the scaling processing by the scaling processing unit 2084 (step S6).
  • the progressive signal obtained by converting the interlaced signal is used regardless of the first progressive signal generation method and the second progressive signal generation method.
  • the progressive signal generated in this way all the lines that constitute the received progressive signal are extracted, and the progressive signal obtained by extracting the line is interpolated on the basis of the correlation of the pixels in the oblique direction. to improve picture quality.
  • the signal generation method it is possible to perform image playback with high image quality for progressive signals distributed over the network.
  • the second embodiment is different from the first embodiment in that the oblique direction interpolation unit 2083 is replaced with an oblique direction interpolation circuit in the case of a moving image included in the interlace-progressive conversion unit 2081 .
  • the description of the same parts as those of the first embodiment will be omitted, and the parts different from those of the first embodiment will be described.
  • FIG. 7 is a diagram showing an example of the configuration of the signal processing unit 208 of the television device 200 according to the second embodiment.
  • the interlace-progressive conversion unit 2081 of the signal processing unit 208 of the television apparatus 200 includes a motion detection unit 301 , a conversion unit 302 , and an oblique direction interpolation unit 303 .
  • the motion detection section 301 generates conversion data based on motion between a plurality of frames of a 1080i/60Hz signal distributed as an interlaced signal.
  • the conversion data is data indicating the presence or absence of motion between a plurality of frames of a 1080i/60Hz signal that is distributed as an interlaced signal.
  • the motion detection unit 301 determines that the distributed interlaced signal is a moving image, and outputs the signal to the oblique direction interpolation unit 303 .
  • the motion detection unit 301 determines that the distributed interlaced signal is a still image, and outputs the signal to the conversion unit 302 .
  • the oblique direction interpolation unit 303 executes an oblique direction interpolation within a frame in which appropriate pixels are interpolated after observing the correlation of pixels in the oblique direction in order to eliminate jagged display at the oblique edge for an interlaced signal in a moving image. Complementary processing is performed to generate a 1080p/60Hz signal as a 1080-line signal.
  • the conversion unit 302 converts the odd field and the even field into odd lines and even lines for an interlaced signal in a still image, and uses the pixels of the previous field as interpolation pixels.
  • the interlace-progressive conversion unit 2081 performs interlace-progressive conversion to generate a 1080p/60Hz signal when, for example, a 1080i/60Hz signal as an interlace signal is distributed.
  • the decimation processing unit 2082 performs a process of decimation into a 540p/30 Hz signal, and outputs it to the oblique direction interpolation unit 303 of the interlace-progressive conversion unit 2081 .
  • the oblique direction interpolation unit 303 of the interlace-progressive conversion unit 2081 performs interpolation based on the correlation of pixels in the oblique direction in order to eliminate the jagged display at the oblique edge for the interlaced signal in the moving image.
  • a signal of 1080p/30Hz is generated as a signal of 1080 lines by interpolation processing in the oblique direction within a frame of an appropriate pixel.
  • the progressive signal obtained by converting the interlaced signal is used regardless of the first progressive signal generation method and the second progressive signal generation method.
  • the lines that constitute the received progressive signal are extracted, and the progressive signal obtained by extracting the lines is interpolated with pixels on the basis of observing the correlation of the pixels in the oblique direction, so as to improve the image quality.
  • the signal generation method it is possible to perform image playback with high image quality for progressive signals distributed over the network.
  • the third embodiment differs from the first embodiment or the second embodiment in that, for a received progressive signal, whether the progressive signal is output to the line extraction processing unit or is switched according to the signal generation method when the progressive signal was generated from the interlaced signal. output directly to the rear stage.
  • the description of the same parts as those of the first embodiment or the second embodiment will be omitted, and the parts different from the first embodiment or the second embodiment will be described.
  • FIG. 8 is a diagram showing an example of the configuration of the signal processing unit 208 of the television apparatus 200 according to the third embodiment. As shown in Fig. 8 , in addition to the configuration of the first embodiment, a mode switching unit 2086 that functions as a first switching unit is provided.
  • the method switching unit 2086 switches the control for the two kinds of progressive signals of 1080p/30 Hz generated by the first progressive signal generation method and the second progressive signal generation method according to the signal generation method when the progressive signal is generated from the interlaced signal. method.
  • the method switching unit 2086 stores, for example, the signal generation method of the progressive signal according to the type of content (CSP (Contents Service Provider), the content of the content, etc.) in advance, determines the type of the progressive signal based on the CSP and the content, and switches the control method.
  • CSP Contents Service Provider
  • the method switching unit 2086 determines that it is a 1080p/30 Hz progressive signal generated by the first progressive signal generation method, it outputs the signal to the scaling processing unit 2084, performs direct scaling processing and then converts the signal to the normal 1080p signal. is the panel frequency.
  • the method switching unit 2086 outputs the signal to the line extraction processing unit 2082 when it is determined that the signal is a 1080p/30 Hz progressive signal generated by the second progressive signal generation method.
  • the line decimation processing unit 2082 executes decimation processing of extracting 1080 lines in one field by one line to obtain a 540p/30Hz signal.
  • the oblique direction interpolation unit 2083 executes an oblique direction interpolation process within a frame in which appropriate pixels are interpolated in view of the correlation of the pixels in the oblique direction to generate a 1080p/30 Hz signal as a signal of 1080 lines, and This is output to the scaling processing unit 2084 .
  • the lines are extracted and the pixels are interpolated after observing the correlation of the pixels in the oblique direction, whereby the pixels are interpolated. to improve picture quality.
  • the pixels are interpolated.
  • the mode switching unit 2086 of the present embodiment stores, for example, the signal generation mode of the progressive signal according to the type of content (CSP, content of the content, etc.) in advance, and determines the progressive signal based on the CSP of the distributed content and the content of the content. types of signals, but not limited to this.
  • the progressive signal may be output to the line extraction processing unit 2082 when it is determined that the progressive signal is a signal generation method that is generated from the interlaced signal by the scaling method.
  • the method switching unit 2086 determines that the progressive signal is a signal generation method generated from the interlaced signal by the scaling method when the odd-numbered line signal and the even-numbered line signal constituting the progressive signal are the same.
  • the fourth embodiment differs from the first to third embodiments in that, for the received progressive signal, whether the progressive signal is directly output or the progressive signal is switched according to the signal generation method in which the progressive signal is generated from the interlaced signal. It is output through the line extraction processing unit and the oblique direction interpolation unit.
  • the description of the same parts as those of the first to third embodiments will be omitted, and the parts different from the first to third embodiments will be described.
  • FIG. 9 is a diagram showing an example of the configuration of the signal processing unit 208 of the television apparatus 200 according to the fourth embodiment. As shown in FIG. 9 , in addition to the configuration of the first embodiment, a mode switching unit 2087 and a scaling detection unit 2088 that function as a second switching unit are provided.
  • the method switching unit 2087 switches the output signal according to the signal generation method generated from the interlaced signal according to the two progressive signals of 1080p/30 Hz generated by the first progressive signal generation method and the second progressive signal generation method. .
  • the scaling detection unit 2088 detects that the progressive signal is a signal generation method that is generated from the interlaced signal by the scaling method.
  • the scaling detection unit 2088 determines that the progressive signal is a signal generation method generated from an interlaced signal by the scaling method when the odd-numbered line signal and the even-numbered line signal constituting the progressive signal are the same.
  • the method switching unit 2087 directly sends the progressive signal to the scaling processing unit of the subsequent stage.
  • the 2084 output is converted to the panel frequency after direct scaling as with the normal 1080p signal.
  • the method switching unit 2087 converts the progressive signal that has been passed through the line extraction processing unit 2082 and the The signal of the oblique direction interpolation unit 2083 is output to the scaling processing unit 2084 in the subsequent stage.
  • the lines are extracted and the pixels are interpolated after observing the correlation of the pixels in the oblique direction, whereby the pixels are interpolated. to improve picture quality.
  • the pixels are interpolated.
  • the mode switching unit 2087 of the present embodiment switches the output signal according to whether the progressive signal is a signal generation mode generated from the interlaced signal by the scaling method, but is not limited to this.
  • the signal generation method of the progressive signal according to the content type may be stored in advance, and the output signal may be switched by determining the progressive signal type based on the CSP of the distributed content and the content of the content.
  • the television apparatus 200 is applied as an example of a "receiver apparatus", it is not limited to this, Of course, it can apply to various electronic apparatuses, such as a tuner, a video recorder, and a personal computer.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un dispositif récepteur susceptible de réaliser une lecture d'images à haute qualité d'image pour des signaux progressifs publiés par un réseau, ainsi qu'un support de stockage non volatil. Le dispositif récepteur comprend : une unité réceptrice, qui reçoit des signaux progressifs obtenus par conversion de signaux entrelacés ; une unité de traitement d'extraction de lignes, qui extrait des lignes constituant les signaux progressifs reçus ; et une unité d'interpolation de directions d'inclinaison, qui interpole des pixels sur les signaux progressifs obtenus par extraction de lignes au moyen de l'unité de traitement d'extraction de lignes tout en observant l'association de pixels selon une direction d'inclinaison.
PCT/CN2021/080504 2020-09-17 2021-03-12 Dispositif récepteur et support de stockage non volatil WO2022057221A1 (fr)

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JPH10276411A (ja) * 1997-03-28 1998-10-13 Fujitsu General Ltd インタレース／プログレッシブ走査変換回路
JPH11298861A (ja) * 1998-04-14 1999-10-29 Hitachi Ltd 画像信号のフレーム数変換方法および装置
CN1315806A (zh) * 2000-03-31 2001-10-03 松下电器产业株式会社 遮掩隔行扫描至逐行扫描转换器中插值缺陷的设备和方法
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