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Method for filtering interpolation

An interpolation method and interpolation technology, applied in television, electrical components, digital video signal modification, etc.

Inactive Publication Date: 2009-01-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, it is inappropriate to use the same interpolation coefficients for reference images corresponding to different block prediction modes

Method used

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  • Method for filtering interpolation
  • Method for filtering interpolation
  • Method for filtering interpolation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0149] Example analysis:

[0150] According to this interpolation method, the analysis of the maximum memory access shows that the maximum memory access is 784 pixels for a whole pixel of a macroblock. Compared with the maximum memory access of 1296 integer pixels in the existing technical solution, it is reduced by 40%

[0151] Table 3. Different block modes correspond to the whole pixel memory access amount of a macro block

[0152] block mode

16*16

16*8 or 8*16

8*8

8*4 or 4*8

4*4

Integer pixel memory access

(decoding a macroblock)

441

546

676

616

784

[0153] According to this interpolation method, the maximum number of operations required to decode a sub-pixel point is 27.625, while the maximum number of operations required by VCEG technical solution 3 is 33.25, and the complexity is reduced by 17%.

[0154] Table 4. Interpolation coefficients required for interpolating each...

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Abstract

The invention relates to an interpolation filtering method which belongs to the technical field of video compression; the method is that two groups of sub-pixels interpolation coefficients are resolved at a decoder terminal from code stream and used for the interpolation filters of data blocks of different patterns. The invention can decrease the decoder access times and simplify the decoder to enhance coding performance.

Description

technical field [0001] The invention belongs to the technical field of video compression, in particular to a novel interpolation filtering method. Background technique [0002] The H.264 video standard is a block-based hybrid predictive coding framework. In order to improve the efficiency of inter-frame predictive coding, it adopts two key technologies: [0003] 1. A motion compensation technique based on different block sizes is adopted. It includes 7 different block prediction modes such as 16*16, 16*8, 8*16, 8*8, 8*4, 4*8, 4*4. Among them, prediction modes: 16*16, 16*8, 8*16, 8*8 are suitable for areas with slow texture or motion changes; smaller block prediction modes such as: 8*4, 4*8, 4*4 are suitable for Areas with dramatic changes in texture or motion. [0004] 2. In order to improve the accuracy of motion compensation, H.264 adopts a 1 / 4 precision sub-pixel motion compensation technology with a fixed coefficient. For example: in H.264 / AVC, the specific interpola...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/46H04N7/50H04N19/44H04N19/587H04N19/59H04N19/61H04N19/80
Inventor 吴仲谋何芸
Owner TSINGHUA UNIV
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