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All-zero-block detection method based on energy conservation law

A detection method and energy conservation technology, applied in digital video signal modification, electrical components, image communication, etc.

Inactive Publication Date: 2015-01-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when SAD>T(2), there are still many all-zero blocks, so there is still room for improvement in the detection rate of all-zero blocks

Method used

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  • All-zero-block detection method based on energy conservation law
  • All-zero-block detection method based on energy conservation law
  • All-zero-block detection method based on energy conservation law

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Select three video sequences of Football, Foreman, and Mother with motion complexity from high to low, and use the proposed all-zero block detection algorithm to detect all-zero blocks. The detection process is as follows: figure 1 Shown:

[0074] 1) Look up the table to get T(2) and Th;

[0075] 2) Judging SAD

[0076] 3) Judging whether the calculated direct current coefficient DC is zero, if it is zero, skip to step 4); otherwise, judge that the block is a non-all-zero block, and skip to step 6);

[0077] 4) Judging SAD

[0078] 5) Skip the transformation and quantization operation and enter the next block of encoding;

[0079] 6) Carry out transformation ...

Embodiment 2

[0119] Three video sequences Mother, Foreman, and Bridge-far with texture complexity from high to low are selected for all-zero block detection, and the detection process is consistent with that in Embodiment 1.

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Abstract

The invention relates to an all-zero-block detection method based on an energy conservation law, which is characterized in that an all-zero block can be detected in advance by predicting the block (all-zero block) with coefficient being zero both before the quantization and after the quantization, so that the quantization process of a residual block can be omitted. Due to the adoption of the method, while the detection efficiency at a maximal quasi peak (QP) is ensured, the effect for detecting the all-zero block in the video coding process at the minimal QP is remarkable, and the introduced calculation quantity in the detection process is small. Therefore, the calculation quantity in the quantization process can be effectively reduced, and the coding efficiency can be improved.

Description

technical field [0001] The invention belongs to the video coding field of information processing, and mainly aims at the transformation and quantization process in the H.264 international video coding standard, and proposes an all-zero block detection method based on energy conservation. Background technique [0002] With the rapid development of modern electronic technology and computer technology represented by VLSI and Internet technology, various new means of information dissemination are constantly emerging, among which multimedia technology and its application fields are the hot spots. For a wide range of multimedia applications, video compression plays an important role. [0003] H.264 is a new generation of digital video coding standard proposed by the Joint Video Team (JVT) composed of experts from the International Telecommunication Union (ITU) and the International Organization for Standardization (ISO / IEC), so it is called MPEG-4 No. 10 for ISO Partially or for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/61H04N19/124H04N19/149H04N19/156H04N19/176H04N19/70
Inventor 黄华王萍邓妍
Owner XI AN JIAOTONG UNIV
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