H.264 standard-based deblocking filter boundary strength computing device and method

A technology of boundary strength and deblocking filtering, applied in the field of video processing, can solve the problem of reducing the execution efficiency of the processor, and achieve the effect of reducing the number of condition judgments, reducing the calculation process, and improving the calculation efficiency

Active Publication Date: 2012-01-11
SOI MICRO CO LTD
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Problems solved by technology

At the same time, the calculation of the boundary strength of each boundary point needs to be compared with the judgment table (attached figure 1 ) are compared in order from top to bottom, which requires a lot of conditional judgments, which greatly reduces the execution efficiency of the processor

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  • H.264 standard-based deblocking filter boundary strength computing device and method
  • H.264 standard-based deblocking filter boundary strength computing device and method
  • H.264 standard-based deblocking filter boundary strength computing device and method

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Embodiment Construction

[0044] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to specific embodiments and drawings.

[0045] In the H.264 standard, the two main factors caused by the blocking effect are the quantization process after the integer transformation and the incomplete accuracy of the motion compensation. Therefore, the boundary strength of the boundary points in the deblocking filter is mainly determined by the boundary strength on both sides of the boundary. The macroblock type of the image block, whether to encode the residual, the motion vector and the reference frame are determined by several determinants. The quantization process of integer transform is the main reason for blocking effect, and the influence caused by quantization in intra-frame coding is the largest, and the influence caused by motion compensation is relatively small. Therefore, different ...

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Abstract

The invention discloses a H.264 standard-based deblocking filter boundary strength computing device and method, which are used for computing boundary strength of boundary points during H.264 deblocking filtering. According to the invention, the boundary point with same modes are pre-judged according to a coding mode of current macroblocks and a coding mode of adjacent macroblocks and according tothe condition that boundaries of the macroblocks exist, and can be directly assigned. For the boundaries which can not be directly assigned, logic operation and arithmetic operation are adopted for replacing skip judgment when the boundary strength is computed. The invention has the advantages of being capable of remarkably reducing a large quantity of repetitive computation and complex conditionjudgment of a deblocking filtering link of the H.264 standard and increasing program execution efficiency, and is especially suitable for embedded processors such as a DSP (Digital Signal Processor).

Description

Technical field [0001] The present invention relates to the technical field of video processing, and in particular to a device and method for calculating deblocking filter boundary strength based on the H.264 standard. Background technique [0002] In the past few decades, the two major international organizations in the video field, ISO-MPEG and ITU, have successively introduced a series of video compression standards such as MPEG-1, MPEG-2 and MPEG-4 as well as H.261, H.263, H.263+, etc., and the H.264 / AVC standard was launched by the Joint Video Experts Group (JVT) of the two major organizations in 2003. Due to the use of intra-frame prediction, integer transformation, and motion estimation / compensation of multiple block sizes , Multi-frame reference, 1 / 4 pixel precision prediction, loop deblocking filtering and other new technologies, making it superior to previous coding standards such as MPEG2 and H.263 in terms of coding efficiency and anti-interference ability. [0003] Mo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/635
Inventor 魏旭姜东梁利平
Owner SOI MICRO CO LTD
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