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Image and video encoding 8x8 transformation method and device compatible with 4x4 transformation

A video coding and image technology, applied in image communication, digital video signal modification, television and other directions, can solve problems such as large amount of calculation, small amount of calculation, poor effect, etc.

Inactive Publication Date: 2006-01-11
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 4×4 transform method has a small amount of calculation, but the ability to remove signal correlation is also small, while the 8×8 transform method is more computationally intensive than the 4×4 transform method, and the ability to remove signal correlation is large, but for four 4× The 8×8 block data spliced ​​by 4 blocks is transformed into 8×8, and the effect is not good

Method used

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  • Image and video encoding 8x8 transformation method and device compatible with 4x4 transformation
  • Image and video encoding 8x8 transformation method and device compatible with 4x4 transformation
  • Image and video encoding 8x8 transformation method and device compatible with 4x4 transformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] An 8×8 vertical forward transformation matrix can be:

[0122] T 8 v = 1 1 1 1 1 1 1 1 10 9 6 2 - 2 - 9 - 6 - 2 2 1 ...

Embodiment 2

[0178] An 8×8 vertical inverse transformation matrix can be:

[0179] T 8 v = 1 10 1 9 1 6 1 / 2 2 1 9 1 / 2 - 2 - 1 - 10 - 1 - ...

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Abstract

The present invention discloses one kind of 8x8 transformation method and device compatible with 4x4 transformation in image and video encoding. The 8x8 transformation method includes the reversible transformation treatment of 8x8 image data or video data and the compatible the reversible transformation treatment of 4x4 image data or video data, and can treat image data or video data in transformation domain. The 8x8 transformation device compatible with 4x4 transformation realizes the said transformation method completely. The complete compatibility of 8x8 and 4x4 transformation method and device of image data or video data introduces no further software and hardware complexity. The present invention may be extended into other signal processing application fields other than image encoding and video encoding fields.

Description

technical field [0001] The invention relates to the technical field of electric digital data processing, in particular to an 8×8 transformation method compatible with 4×4 transformation in image and video coding. Background technique [0002] Traditional video coding standards such as H.261, H.263, H.26L, and H.264 standards formulated by ITU and MEPG-1, MPEG-2, and MPEG-4 formulated by ISO's MPEG organization are all based on hybrid coding. That is, on top of the Hybrid Coding framework. The so-called hybrid coding framework is a coding framework that comprehensively considers prediction, transformation and entropy coding methods, and has the following main features: [0003] 1) Use prediction to remove redundancy in the time domain; [0004] 2) Use transformation to remove redundancy in the spatial domain; [0005] 3) and remove statistical redundancy with entropy coding; [0006] The above-mentioned video coding standards all have intra-coded frames, namely I frames, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24H04N7/30H04N19/122H04N19/60
Inventor 楼剑虞露
Owner XFUSION DIGITAL TECH CO LTD