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H.264 protocol based optimized decoding method for intra-frame coding compression technology

A compression technology, an intra-frame coding technology, is applied in the optimized decoding field of the intra-frame coding compression technology based on the H.264 protocol, which can solve the problems of increased complexity and algorithm, increased decoding and encoding time, etc., to achieve accelerated decoding process, easy update, and the effect of saving clock cycles

Inactive Publication Date: 2011-09-14
HARBIN INST OF TECH
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Problems solved by technology

But at the same time, the complexity and the amount of algorithms will be greatly increased, which will increase the decoding and encoding time.

Method used

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  • H.264 protocol based optimized decoding method for intra-frame coding compression technology
  • H.264 protocol based optimized decoding method for intra-frame coding compression technology
  • H.264 protocol based optimized decoding method for intra-frame coding compression technology

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[0041] The schematic diagram of the 16×16 prediction mode is as follows figure 1 As shown, there are four prediction reference modes of horizontal, vertical, DC, and plane in the coding standard; the schematic diagram of the 4×4 prediction mode is shown in figure 2 As shown, there are nine prediction reference modes of horizontal, vertical, lower left diagonal, lower right diagonal, left vertical, right vertical, upper horizontal, lower horizontal, and DC.

[0042] After decomposing 16×16, the horizontal, vertical and DC modes can be combined with the original 4×4 prediction mode, and the plane mode can be decoded separately. There are then 10 predictive modes that may be encountered.

[0043] Analyze the 10 prediction modes, simplify the abstraction on the algorithm given by the protocol, find out the common operation unit, and finally summarize 5 operation modules to complete all the decoding operations.

[0044] The five abstract operation forms are:

[0045] Pred4×4[x,...

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Abstract

The invention discloses an H.264 protocol based optimized decoding method for an intra-frame coding compression technology. According to the intra-frame predictive coding principle, the optimized decoding method is provided at a decoding end. The design structure aims to save a clock period and simplify a computing unit, and decodes the input code stream to reduce the pixels of the original image. After the predictive coding characteristics of two macro blocks and the algorithm are researched and analyzed, the process is simplified, analyzed and reasonably arranged, and parallel decoding is adopted according to the positions of the macro blocks and the calling characteristics of reference pixels during decoding, so that the purpose of realizing accurate and efficient image decoding is fulfilled. The method has the advantages that: 1, the clock period is saved; 2, the requirement of real-time decoding response can be adapted; 3, the computing unit and the circuit structure are simplified to facilitate update; and 4, the decoding process is accelerated by adopting a parallel decoding mechanism.

Description

technical field [0001] The invention is based on the research on the decoding part of the intra-frame coding compression technology in the H.264 protocol. After analyzing the characteristics of macroblocks and specific coding modes, optimize macroblocks and algorithms, and propose new schemes and architectures. Background technique [0002] With the advancement of digital high-definition TV transformation and the continuous emergence of new media, video transmission has put forward higher requirements for network bandwidth, and the audio and video codec technology that is still in the mainstream application currently needs to be updated due to its outdated technology and high fees The reason is about to withdraw from the stage of history. As a high-performance video coding technology, H.264 has been rapidly developed and applied in the field of digital video communication due to its superior video compression ratio. Compared with MPE6-2 and MPE6-4 technologies, H.264 techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/159H04N19/176H04N19/503
Inventor 王进祥车文斌陈达燕李彩云刘英哲徐伟哲许旌阳
Owner HARBIN INST OF TECH
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