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Method for improving HDMI display data stream compression intercommunication and interconnection

A technology of data stream compression and data compression, which is applied in the direction of image communication, color TV parts, TV system parts, etc., can solve the problem of VESADSC capability mismatch at the HDMI transceiver end, so as to facilitate upgrade and maintenance, and improve the system Resource utilization and the effect of reducing design complexity

Active Publication Date: 2021-08-13
GUANGDONG BOHUA UHD INNOVATION CENT CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0043] The purpose of the present invention is to provide a method for improving HDMI display data stream compression and intercommunication, improving the display data compression algorithm used in HDMI transmission in terms of intercommunication and interconnection, and this method can solve the problem of VESA DSC capability mismatch at the HDMI transceiver

Method used

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  • Method for improving HDMI display data stream compression intercommunication and interconnection
  • Method for improving HDMI display data stream compression intercommunication and interconnection
  • Method for improving HDMI display data stream compression intercommunication and interconnection

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Embodiment Construction

[0080] Image 6 It is a detailed flow chart of the method of the present invention, which improves the use of the HDMI display data compression algorithm in interoperability, including 9 steps, and how to help HDMI devices can better communicate and match.

[0081] Step 1: The source device and the display device are physically linked by the HDMI cable;

[0082] Step 2: The source device sent from the display device + 5V signal;

[0083] Step 3: Display the device After receiving the + 5V signal, start start, first prepare the EDID content, and return to the source device after the EDID is ready to return HPD high;

[0084] Step 4: After receiving the HPD high level signal, the receiving end is started to read the EDID content of the display device via the DDC;

[0085] Step 5: The source device parses the EDID content to understand the overall ability of the display device. In particular, by parsing the SCDS data structure, the ability to display the display device on the DSC, in...

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Abstract

The invention provides an improved data compression method for HDMI transmission in the aspect of intercommunication and interconnection, which specifically comprises the following steps that: source equipment analyzes EDID content to know the overall capability of display equipment; particularly, by analyzing the SCDS data structure, the capability of the display device on the DSC, including the FRL maximum rate and the number of DSC chip processing units (such as eight), is known; the fourth bit of the 8th byte of the SCDS is DSC_422_Option, and if the fourth bit of the 8th byte of the SCDS is 1, the display equipment can support 4: 2: 2 DSC under specific conditions (such as 8K120), so that the required DSC resource is less than that of 4: 4: 4 DSC; if the value is 0, the display device does not support 4: 2: 2 DSC under the specific condition. HDMI2.1 equipment is allowed to conditionally support at most 8 DSC chip units, so that normal work of 8K120422 video streaming is guaranteed, meanwhile, other scenes are not affected, backward compatibility is guaranteed, and the problem that VESA DSC capacities of HDMI receiving and transmitting ends are not matched is solved.

Description

Technical field [0001] The present invention relates to the field of display data stream compression (DSC, DISPLAY STREAM Compression) specified by HDMI (High Definition Media Interface) 2.1, in particular, an improved HDMI display data stream compression interoperability, this method improves DSC in HDMI The interconnection of the system level is to solve problems that existing technologies causing mismatches in the transceiver. Background technique [0002] figure 1 It is a basic HDMI functional block diagram, including 3 TMDS (Transmission MinimizedDiffERENTIAL SIGNAL) data channels and a TMDS clock channel, as well as transceiver communication DDC (Display DataAnnel) and connection indication HPD (Hot Plug Detection). [0003] figure 2 It is the function chart of the HDMI FRL (Fixed Rate Link), which contains four FRL data channels, where the fourth FRL data channel multiplexes the TMDS mode clock channel, the DDC, and HPD are the same as TMDS mode. [0004] HDMI Standard I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/765H04N21/4363H04N21/2389H04N21/4385H04N21/426H04N21/478H04N21/4402
CPCH04N5/765H04N21/43635H04N21/23895H04N21/43853H04N21/426H04N21/4781H04N21/440263H04N21/440281H04N21/2389H04N21/478H04N21/4402H04N21/4363H04N21/4385H04N7/015H04N7/01
Inventor 黄炯龙仕强
Owner GUANGDONG BOHUA UHD INNOVATION CENT CO LTD
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