CN117896571A - Self-adaptive screen pointing method and system - Google Patents

Self-adaptive screen pointing method and system Download PDF

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Publication number
CN117896571A
CN117896571A CN202311691386.0A CN202311691386A CN117896571A CN 117896571 A CN117896571 A CN 117896571A CN 202311691386 A CN202311691386 A CN 202311691386A CN 117896571 A CN117896571 A CN 117896571A
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China
Prior art keywords
video signal
dsc
instruction
module
analysis
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CN202311691386.0A
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Chinese (zh)
Inventor
鲁文怡
钟文馗
郭斌
付玉红
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Konka Group Co Ltd
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Konka Group Co Ltd
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Priority to CN202311691386.0A priority Critical patent/CN117896571A/en
Publication of CN117896571A publication Critical patent/CN117896571A/en
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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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440263—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping

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

Abstract

The application discloses a self-adaptive screen pointing method and a system, wherein the method comprises the following steps: receiving and analyzing a video signal sent by front-end equipment to obtain an analyzed video signal; when the analysis video signal is a video signal with DSC compression, performing DSC decoding on the analysis video signal to obtain a decoded video signal; selecting one of the decoded video signal and the parsed video signal to be buffered according to whether the parsed video signal has DSC compression; acquiring a preset instruction and reading a video signal cached before according to a video format corresponding to the preset instruction; the preset instruction corresponds to the display parameter of the display module; and converting the video signal into an output protocol form and outputting the video signal to the display module. The method and the device can realize high-resolution high-refresh rate dot screen while guaranteeing lossless image quality.

Description

Self-adaptive screen pointing method and system
Technical Field
The application relates to the technical field of ultra-high definition refresh rate, in particular to a self-adaptive screen pointing method and system.
Background
In high-end display applications, the user experience caused by high resolution and high refresh rate (commonly including 8K120Hz video signal, 8K60Hz video signal, 4K240Hz video signal, etc.) is extremely excellent, and the display device becomes one of the hot spots of consumer attention. To transmit high resolution high refresh rate video content from a live broadcast live or television channel to a display terminal and ultimately to be presented to a user without loss, each node of the transmission chain needs to have high resolution high refresh rate processing capabilities (e.g., recording of a program source, network transmission, set top box reception, high speed transmission of a set top box to a display terminal, display) otherwise the final presentation of the high resolution high refresh rate video original image content is not guaranteed. With the popularization of front-end high-resolution high-refresh rate program sources and the maturity of transmission chains such as network transmission, set top box receiving and the like, full-link high-resolution high-refresh rate transmission and display from a set top box to a display end become more and more urgent demands.
The existing high-resolution high-refresh rate dot screen device obtains high-resolution high-refresh rate signals by arithmetic operations such as scaling, MEMC frame inserting and the like on low-resolution low-refresh rate signals and then drives the TCON dot screen, but an image with high resolution and high refresh rate obtained by arithmetic operations such as scaling, MEMC frame inserting and the like on a low-resolution low-refresh rate signal source is lossy, partial details can be lost, and picture distortion phenomena such as smear and the like can easily occur on a moving scene, particularly a high-speed moving scene.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present application is to provide a self-adaptive dot screen method and system, so as to solve the problem of image impairment of high resolution and high refresh rate obtained in the dot screen scheme of high resolution and high refresh rate in the prior art.
The technical scheme of the application is as follows:
an adaptive dot screen method, comprising:
receiving and analyzing a video signal sent by front-end equipment to obtain an analyzed video signal;
when the analysis video signal is a video signal with DSC compression, performing DSC decoding on the analysis video signal to obtain a decoded video signal;
selecting one of the decoded video signal and the parsed video signal to be buffered according to whether the parsed video signal has DSC compression;
acquiring a preset instruction and reading a video signal cached before according to a video format corresponding to the preset instruction; wherein, the preset instruction corresponds to the display parameter of the display module;
and converting the video signal into an output protocol form and outputting the video signal to the display module.
The application further sets that, when the parsed video signal is a video signal with DSC compression, the step of performing DSC decoding on the parsed video signal to obtain a decoded video signal includes:
and identifying the analysis video signal, when the analysis video signal is a video signal with DSC compression, buffering a decoded video signal obtained by performing DSC decoding on the analysis video signal, and when the analysis video signal is not with DSC compression, buffering the analysis video signal.
The application further sets up, preset instruction includes: the first instruction, the second instruction and the nth instruction;
when the preset instruction is a first instruction, reading a cached video signal according to a video format corresponding to the first instruction;
when the preset instruction is a second instruction, reading the cached video signal according to a video format corresponding to the second instruction;
and when the preset instruction is an nth instruction, reading the cached video signal according to a video format corresponding to the nth instruction.
The application further sets that, in the step of obtaining the preset instruction and reading the video signal buffered before according to the video format corresponding to the preset instruction, a line-reading manner is adopted to read the video signal, and the data amount read by each line and the reading line number of each frame are selected according to the video format.
An adaptive dot screen system based on the adaptive dot screen method, which comprises: the device comprises an input module, a DSC decoding control module, a DDR cache module and an output module; wherein,
the input module is connected with the DSC decoding control module and is used for receiving the video signal sent by the front-end equipment and analyzing the video signal to obtain an analyzed video signal;
the DSC decoding control module is respectively connected with the input module and the DDR buffer module and is used for performing DSC decoding on the analysis video signal to obtain a decoded video signal when the analysis video signal is a video signal with DSC compression;
the DDR buffer module is connected with the DSC decoding control module and is used for buffering the decoded video signal or the analysis video signal, acquiring a preset instruction and reading the video signal buffered before according to a video format corresponding to the preset instruction;
the output module is connected with the DDR buffer module and is used for converting the video signal into an output protocol form and outputting the video signal to the display module.
The application further sets up, DSC decoding control module includes: a judging unit and a DSC decoding unit; wherein,
the judging unit is respectively connected with the input module, the DSC decoding unit and the DDR cache module and is used for inputting the analysis video signal to the DSC decoding unit when judging that the analysis video signal has DSC compression and inputting the analysis video signal to the DDR cache module when judging that the analysis video signal does not have DSC compression;
the DSC decoding unit is used for decoding the analysis video signal with DSC compression.
The application further sets, the DDR buffer module includes; instruction unit, DDR memory unit and DDR buffer; wherein,
the instruction unit is connected with the DDR buffer and is used for selecting a corresponding video format according to a preset instruction;
the DDR buffer is respectively connected with the judging unit and the DSC decoding unit and is used for buffering the decoded video signal or the analysis video signal;
the DDR storage unit is connected with the DDR buffer and is used for storing the decoded video signal or the analysis video signal.
The application further sets out that the output module includes a VByOne TX unit.
The application further provides that the input module comprises a HDMI2.1RX unit or the input module comprises a DP unit.
The application provides a self-adaptive screen pointing method and a system, wherein the method comprises the following steps: receiving and analyzing a video signal sent by front-end equipment to obtain an analyzed video signal; when the analysis video signal is a video signal with DSC compression, performing DSC decoding on the analysis video signal to obtain a decoded video signal; selecting one of the decoded video signal and the parsed video signal to be buffered according to whether the parsed video signal has DSC compression; acquiring a preset instruction and reading a video signal cached before according to a video format corresponding to the preset instruction; wherein, the preset instruction corresponds to the display parameter of the display module; and converting the video signal into an output protocol form and outputting the video signal to the display module. According to the method, the received high-resolution high-refresh rate video signal is analyzed, DSC decoding and buffering are carried out on the analyzed video signal with DSC compression, then the decoded video signal is read according to a preset instruction, and the decoded video signal is converted into an output protocol form and is output to the display module. Compared with the prior art, algorithm operations such as scaling, MEMC frame insertion and the like are not needed, and high-resolution high-refresh rate dot screen can be realized while image quality is guaranteed to be lossless.
Drawings
For a clearer description of embodiments of the present application or of the solutions of the prior art, the drawings that are required to be used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the present application, and that other drawings may be obtained from the structures shown in these drawings without the need for inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an adaptive dot screen system in the present application.
Fig. 2 is a flow chart of the adaptive spot-screen method in the present application.
Fig. 3 is a timing chart of the input signal read DDR buffer mode of 8K120HZ, 8K60HZ, 4K240HZ in the present application.
The marks in the drawings are as follows: 100. an input module; 200. a DSC decoding control module; 210. a judging unit; 220. a DSC decoding unit; 300. an output module; 310. an instruction unit; 320. DDR memory cell; 330. DDR buffer.
Detailed Description
The application provides a self-adaptive screen pointing method and a system, and in order to make the purposes, technical schemes and effects of the application clearer and more definite, the application is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In the description and claims, unless the context specifically defines the terms "a," "an," "the," and "the" include plural referents. If there is a description of "first," "second," etc. in an embodiment of the present application, the description of "first," "second," etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
Referring to fig. 1, a preferred embodiment of an adaptive dot screen system is provided.
In some embodiments, the present application provides an adaptive dot screen system, as shown in fig. 1, comprising: an input module 100, a DSC decoding control module 200, a DDR buffer module 300, and an output module 400. The input module 100 is connected to the DSC decoding control module 200, and is configured to receive a video signal sent by a front-end device and parse the video signal to obtain a parsed video signal; the DSC decoding control module 200 is respectively connected with the input module 100 and the DDR buffer module 300, and is configured to, when the parsed video signal is a video signal having DSC compression, perform DSC decoding on the parsed video signal to obtain a decoded video signal; the DDR buffer module 300 is connected to the DSC decoding control module 200, and is configured to buffer the decoded video signal or the parsed video signal, and to obtain a preset instruction, and read the decoded video signal or the parsed video signal that is buffered before according to a video format corresponding to the preset instruction; the output module 400 is connected to the DDR buffer module 300, and is configured to convert a video signal into an output protocol format and output the video signal to the display module.
In particular, the front-end device may be a computer or television set-top box. The display module can be, but is not limited to, an LCD display screen and an LED display screen. The preset command is an external input command, which can be understood as an input code through a dial key, wherein each different code corresponds to a different display end, that is, if the supportable resolution or refresh rate of the display end is different, the preset command is also different. Therefore, by reading the video signal according to the preset command, the video signal and the display module can be displayed in one-to-one correspondence, wherein the display parameters of the display module correspond to the preset command, the display parameters include the displayed video format, for example, a 4K240HZ display module, an 8K60HZ display module or an 8K120HZ display module, and different display modules correspond to different preset commands. When the display module is a 4K240HZ display module or an 8K60HZ display module or an 8K120HZ display module, the received video signal may be a 4K240HZ input signal or an 8K60HZ input signal or an 8K120HZ input signal, and when the display module type is known, the display module may select a corresponding video format by inputting a preset command from the outside to read out the data of the video signal, so that the display module displays the video signal in the corresponding data format. The display code stream compression (Display Stream Compression, DSC) is a compression algorithm for lossless or lossless compression of image and video data, which can reduce the bandwidth required for transmission, and when receiving video signals, the display code stream compression (Display Stream Compression, DSC) can selectively compress the video signals, reduce the data transmission amount, and realize efficient and lossless image quality transmission through DSC decoding.
In specific implementation, the input module 100 parses a video signal (high-speed serial signal) input by a single cable of a computer or a television set-top box through an FPGA to obtain a parsed video signal (low-speed parallel signal), where the received video signal includes a video signal with high resolution and high refresh rate, for example, an 8K120Hz video signal, an 8K60Hz video signal, and a 4K240Hz video signal. The video signal with high resolution and high refresh rate received by the input module 100 is a video signal with DSC compression, and needs to be decoded by the DSC decoding control module 200 and buffered by the DDR buffer module 300 during transmission, and then the decoded video signal with corresponding video format is read under the control of a preset instruction, converted into an output protocol form by the output module 400, and output to the Tcon chip of the display module, so as to finish the screen pointing. When the analysis video signal is a video signal without DSC compression, DSC decoding is not needed, and buffering is directly performed.
In the technical scheme, the video signal is accessed by a single cable, so that compared with the traditional method of driving the Tcon point screen by adopting a multi-cable or multi-chip access mode, the method reduces the difficulty of system design and improves the reliability. In addition, the method and the device for decoding and caching the video signals with DSC compression and high resolution and high refresh rate perform DSC decoding and caching on the received video signals with DSC compression, then read the decoded video signals according to the preset instruction, convert the decoded video signals into an output protocol form and output the output protocol form to the display module, so that the full-link high resolution and high refresh rate point screen is realized, the obtained images with DSC compression and high refresh rate are ensured not to be damaged, and the phenomenon of picture distortion such as smear and the like of high-speed moving scenes can be avoided. In addition, the invention can be self-adaptive according to the different resolutions and refresh rates of the display module, has high flexibility, can meet the requirements of various different scenes, and is convenient for quick popularization.
In some embodiments, the input module 100 includes HDMI2.1RX units (with high compatibility, which can be applied to televisions, home theater systems, and consumer electronics devices) or DP units (DP interfaces have a powerful configuration in video bandwidth and multiple displays, supporting higher resolution and refresh rate, and can be used to connect to a high resolution display or multiple display set up), for example, when the input module 100 is HDMI2.1RX units and HDMI2.1RX units are single cables, the FPGA can be used to parse the HDMI RX protocol from the 4K240HZ or 8K60HZ or 8K120HZ signals input by the single cable of the computer or television set-top box and obtain the low-speed parallel signals. Note that, in consideration of bandwidth limitation of the single cable protocol, the video signals with high resolution and high frame rate such as 4K240HZ, 8K60HZ RGB and 8K120HZ cannot pass through HDMI2.1RX units, so that the video signals with high resolution and high frame rate such as 4K240HZ, 8K60HZ RGB and 8K120HZ are subjected to DSC compression, so that the video signals with high resolution and high frame rate such as 4K240HZ, 8K60HZ RGB and 8K120HZ can be input into HDMI2.1RX units for analysis.
In some embodiments, the DSC decoding control module 200 comprises: a judging unit 210 and a DSC decoding unit 220. The determining unit 210 is connected to the input module 100, the DSC decoding unit 220, and the DDR buffer module 300, and is configured to input the resolved video signal to the DSC decoding unit 220 when determining that there is DSC compression of the resolved video signal, and input the resolved video signal to the DDR buffer module 300 when determining that there is no DSC compression of the resolved video signal, where the DSC decoding unit 220 is configured to decode the resolved video signal having DSC compression.
Further, the DDR cache module 300 includes: instruction unit 310, DDR memory unit 330, and DDR register 320. The instruction unit 310 is connected to the DDR buffer 320, and is configured to select a corresponding video format according to a preset instruction; the DDR buffer 320 is connected to the judging unit 210 and the DSC decoding unit 220, respectively, and is configured to buffer the decoded video signal or the parsed video signal; the DDR memory unit 330 is connected to the DDR buffer 320, and is configured to store a decoded video signal or the parsed video signal.
In particular, in addition to being able to transmit high resolution high refresh rate video signals, other video signals may be compatible as well. If the video signal with the non-high resolution and the high refresh rate is not transmitted due to the bandwidth limitation of the port, the video signal with the non-high resolution and the high refresh rate is not provided with DSC compression, and whether the video signal is provided with DSC compression or not is judged first, and then whether DSC decoding is needed or not is judged. After the input module 100 parses the received video signal, the determining unit may perform recognition and determination on the parsed video signal, if the parsed video signal has DSC compression, input the parsed video signal to the DSC decoding unit for DSC decoding, if the parsed video signal does not have DSC compression, input the parsed video signal to the DDR buffer 330, and further store the parsed video signal in the DDR storage unit, so as to further reduce the operation process, avoid decoding the video signal with non-high resolution and high refresh rate, and increase the program redundancy. The decoded video signal or the parsed video signal in the DDR memory unit 320 may be read and outputted to the output module 400 under the control of the instruction unit 310.
In some embodiments, the preset instructions include: the first instruction, the second instruction and the nth instruction. When the preset instruction is a first instruction, reading a cached video signal according to a video format corresponding to the first instruction; when the preset instruction is a second instruction, reading the cached video signal according to a video format corresponding to the second instruction; and when the preset instruction is an nth instruction, reading the cached video signal according to a video format corresponding to the nth instruction.
For example, when the display end is a display module with 8K120Hz, the first instruction (such as instruction 1 in fig. 1) represents reading according to the video format with 8K120Hz, and the decoded video signal with 8K120Hz may be selected to be read according to the first instruction received by the instruction unit. When the display end is an 8K60Hz display module, the second instruction is shown as an instruction 2) in fig. 1, and is read according to the 8K60Hz video format, and the 8K60Hz decoded video signal can be selected and read according to the second instruction received by the instruction unit. When the display end is 4K240Hz, the 3 rd instruction is as instruction 3) in fig. 1, and the 4K240Hz decoded video signal can be selected to be read according to the 3 rd instruction received by the instruction unit.
In some embodiments, the output module 400 includes a VByOne TX unit, and the VByOne protocol is a digital interface standard developed specifically for image transmission, and adopts a differential signal transmission mode, so that signal noise and crosstalk can be effectively reduced and a transmission distance and a transmission rate can be improved through differential transmission. The VByOne TX unit is respectively connected with the DDR buffer and the display module, can convert read data into a VByOne protocol form, and outputs the VByOne protocol form to the display module.
In some embodiments, the present application further provides an adaptive dot screen method, as shown in fig. 2, including the steps of:
s100, receiving a video signal sent by front-end equipment and analyzing the video signal to obtain an analyzed video signal; when the analysis video signal is a video signal with DSC compression, performing DSC decoding on the analysis video signal to obtain a decoded video signal;
s200, selecting one of the decoded video signal or the resolved video signal to be buffered according to whether DSC compression exists in the resolved video signal or not;
s300, acquiring a preset instruction and reading a video signal cached before according to a video format corresponding to the preset instruction; wherein, the preset instruction corresponds to the display parameter of the display module;
s400, converting the video signal into an output protocol form and outputting the video signal to a display module.
In specific implementation, the input module parses a video signal input by a single cable of a computer or a television set-top box through an FPGA to obtain a parsed video signal, where the received video signal includes a video signal with high resolution and high refresh rate, for example, an 8K120Hz video signal, an 8K60Hz video signal, and a 4K240Hz video signal. The video signals with high resolution and high refresh rate received by the input module are video signals with DSC compression, decoding operation is needed to be carried out through the DSC decoding control module and the decoding operation is cached through the DDR caching module during transmission, then the decoded video signals with corresponding video formats are read under the control of preset instructions, and are converted into output protocol forms through the output module and then are output to a Tcon chip of the display module, so that screen pointing is completed. The invention uses a single cable to access the video signal, compared with the prior art that a multi-cable or multi-chip access mode is adopted to drive the Tcon point screen, the difficulty of system design is reduced, and the reliability is improved. In addition, the method and the device for decoding and caching the video signals with DSC compression and high resolution and high refresh rate perform DSC decoding and caching on the received video signals with DSC compression, then read the decoded video signals according to the preset instruction, convert the decoded video signals into an output protocol form and output the output protocol form to the display module, so that the full-link high resolution and high refresh rate point screen is realized, the obtained images with DSC compression and high refresh rate are ensured not to be damaged, and the phenomenon of picture distortion such as smear and the like of high-speed moving scenes can be avoided.
In some embodiments, when the parsed video signal is a video signal with DSC compression, the step of DSC decoding the parsed video signal to obtain a decoded video signal includes:
and S210, identifying the analysis video signal, caching a decoded video signal obtained by performing DSC decoding on the analysis video signal when the analysis video signal is a video signal with DSC compression, and caching the analysis video signal when the analysis video signal is not with DSC compression.
Specifically, after the input module analyzes the received video signal, the input module performs identification and judgment on the analyzed video signal, if the analyzed video signal has DSC compression, the analyzed video signal is input to the DSC decoding unit for DSC decoding, and if the analyzed video signal does not have DSC compression, the analyzed video signal is input to the DDR buffer and further stored in the DDR storage unit. Under the control of the instruction unit, the decoded video signal or the parsed video signal in the DDR memory unit can be read and output to the output module.
In some embodiments, the preset instructions include: the first instruction, the second instruction and the nth instruction. When the preset instruction is a first instruction, reading a cached video signal according to a video format corresponding to the first instruction; when the preset instruction is a second instruction, reading the cached video signal according to a video format corresponding to the second instruction; and when the preset instruction is an nth instruction, reading the cached video signal according to a video format corresponding to the nth instruction.
Specifically, when the preset instruction is a first instruction, the DDR buffer reads the decoded video signal according to a video format corresponding to the first instruction; when the preset instruction is a second instruction, the DDR buffer reads the decoded video signal according to the video format corresponding to the preset instruction; and when the preset instruction is an nth instruction, reading a decoded video signal corresponding to the nth instruction.
For example, when the display end is a display module with 8K120Hz, the first instruction represents reading according to the video format with 8K120Hz, and the DDR buffer may select to read the decoded video signal with 8K120Hz according to the first instruction. When the display end is an 8K60Hz display module, the second instruction represents reading according to the 8K60Hz video format, and the DDR buffer can select and read the 8K60Hz decoding video signal according to the second instruction. When the display end is 4K240Hz, the nth instruction represents reading according to the video format of 4K240Hz, and the DDR buffer can select to read the decoding video signal of 4K240Hz according to the nth instruction.
In some embodiments, in the step of obtaining the preset instruction and reading the video signal buffered before according to the video format corresponding to the preset instruction, the video signal is read in a line-by-line reading manner, and the data amount read in each line and the number of lines read in each frame are selected according to the video.
Specifically, in one line period, the complete line data is read at a time, the line periods allocated to one line of data in different formats are different, the time for reading one line of data is determined by the data amount of one line and the reading speed of DDR, and the difference between the line period and the reading data period is an idle time period. As shown in fig. 3, when the DDR buffer data is read in the 8K120HZ format, the line cycle signal is 1.853us, the DDR read valid signal is 1.8us, when the DDR buffer data is read in the 8K60HZ format, the line cycle signal is 3.7us, the DDR read valid signal is 3.703us, and when the DDR buffer data is read in the 4K240HZ format, the line cycle signal is 1.893us, the DDR read valid signal is 1.8us.
In summary, the self-adaptive screen pointing method and system provided by the application have the following beneficial effects:
a single cable is used for accessing video signals, and compared with the existing method for driving a Tcon point screen by adopting a multi-cable or multi-chip access mode, the method reduces the difficulty of system design and improves the reliability. In addition, after the received video signals with DSC compression and DSC decoding cache is carried out on the video signals with DSC compression and DSC high refresh rate, the decoded video signals are read according to the preset instructions, and the decoded video signals are converted into an output protocol form and output to the display module, so that the full-link high-resolution high-refresh rate dot screen is realized, the obtained images with DSC compression and DSC high refresh rate are ensured not to be damaged, and the phenomenon of picture distortion such as smear and the like of high-speed moving scenes can be avoided. In addition, the invention can be self-adaptive according to the different resolutions and refresh rates of the display module, has high flexibility, can meet the requirements of various different scenes, and is convenient for quick popularization.
It is to be understood that the application of the present application is not limited to the examples described above, but that modifications and variations can be made by a person skilled in the art from the above description, all of which modifications and variations are intended to fall within the scope of the claims appended hereto.

Claims (9)

1. An adaptive spot-screen method, comprising:
receiving and analyzing a video signal sent by front-end equipment to obtain an analyzed video signal;
when the analysis video signal is a video signal with DSC compression, performing DSC decoding on the analysis video signal to obtain a decoded video signal;
selecting one of the decoded video signal and the parsed video signal to be buffered according to whether the parsed video signal has DSC compression;
acquiring a preset instruction and reading a video signal cached before according to a video format corresponding to the preset instruction; wherein, the preset instruction corresponds to the display parameter of the display module;
and converting the video signal into an output protocol form and outputting the video signal to the display module.
2. The adaptive spot-screen method according to claim 1, wherein when the parsed video signal is a video signal with DSC compression, the step of DSC decoding the parsed video signal to obtain a decoded video signal comprises:
and identifying the analysis video signal, when the analysis video signal is a video signal with DSC compression, buffering a decoded video signal obtained by performing DSC decoding on the analysis video signal, and when the analysis video signal is not with DSC compression, buffering the analysis video signal.
3. The adaptive spot-screen method according to claim 1, wherein the preset instruction includes: the first instruction, the second instruction and the nth instruction;
when the preset instruction is a first instruction, reading a cached video signal according to a video format corresponding to the first instruction;
when the preset instruction is a second instruction, reading the cached video signal according to a video format corresponding to the second instruction;
and when the preset instruction is an nth instruction, reading the cached video signal according to a video format corresponding to the nth instruction.
4. The adaptive spot-shielding method according to claim 1, wherein in the step of acquiring the preset command and reading the video signal buffered before according to the video format corresponding to the preset command, the video signal is read in a line-by-line manner, and the data amount read per line and the number of lines read per frame are selected according to the video format.
5. An adaptive dot screen system based on the adaptive dot screen method of any one of claims 1 to 4, comprising: the device comprises an input module, a DSC decoding control module, a DDR cache module and an output module; wherein,
the input module is connected with the DSC decoding control module and is used for receiving the video signal sent by the front-end equipment and analyzing the video signal to obtain an analyzed video signal;
the DSC decoding control module is respectively connected with the input module and the DDR buffer module and is used for performing DSC decoding on the analysis video signal to obtain a decoded video signal when the analysis video signal is a video signal with DSC compression;
the DDR buffer module is connected with the DSC decoding control module and is used for buffering the decoded video signal or the analysis video signal, acquiring a preset instruction and reading the video signal buffered before according to a video format corresponding to the preset instruction;
the output module is connected with the DDR buffer module and is used for converting the video signal into an output protocol form and outputting the video signal to the display module.
6. The adaptive dot-screen system of claim 5, wherein the DSC decoding control module comprises: a judging unit and a DSC decoding unit; wherein,
the judging unit is respectively connected with the input module, the DSC decoding unit and the DDR cache module and is used for inputting the analysis video signal to the DSC decoding unit when judging that the analysis video signal has DSC compression and inputting the analysis video signal to the DDR cache module when judging that the analysis video signal does not have DSC compression;
the DSC decoding unit is used for decoding the analysis video signal with DSC compression.
7. The adaptive dot-screen system of claim 6, wherein the DDR cache module comprises; instruction unit, DDR memory unit and DDR buffer; wherein,
the instruction unit is connected with the DDR buffer and is used for selecting a corresponding video format according to a preset instruction;
the DDR buffer is respectively connected with the judging unit and the DSC decoding unit and is used for buffering the decoded video signal or the analysis video signal;
the DDR storage unit is connected with the DDR buffer and is used for storing the decoded video signal or the analysis video signal.
8. The adaptive dot-screen system of claim 5, wherein the output module comprises a VByOne TX unit.
9. The adaptive dot screen system of claim 5, wherein the input module comprises a HDMI2.1RX unit or the input module comprises a DP unit.
CN202311691386.0A 2023-12-08 2023-12-08 Self-adaptive screen pointing method and system Pending CN117896571A (en)

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