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Intra-frame image predictive encoding and decoding method and video codec

An intra-frame image, predictive coding technology, applied in image communication, digital video signal modification, television and other directions, can solve the problems of low efficiency of intra-frame image predictive coding and decoding, not fully utilizing the V correlation of chrominance components, etc. Effect of Intra-frame Image Prediction on Encoding and Decoding Efficiency

Inactive Publication Date: 2013-08-21
LG ELECTRONICS (CHINA) R&D CENT CO LTD
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Problems solved by technology

[0009] However, when the existing intra-frame image prediction codec method uses LM for intra-frame image prediction codec, it does not make full use of the correlation between the chrominance component V and the chrominance component U, which makes the intra-frame image prediction codec efficiency relatively low. Low

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  • Intra-frame image predictive encoding and decoding method and video codec
  • Intra-frame image predictive encoding and decoding method and video codec
  • Intra-frame image predictive encoding and decoding method and video codec

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[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0043] In order to make full use of the correlation between the chrominance component V and the chrominance component U, and improve the efficiency of encoding and decoding intra-frame image prediction, the embodiment of the present invention modifies the existing LM. The existing LM assumes that there is a linear relationship between the chroma component U and the chroma component V and the luminance component Y. Based on this assumption, when encoding the chroma, the LM uses the reconstructed value of the luminance component Y to convert the chroma component U and th...

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Abstract

The invention discloses an intra-frame image predictive encoding and decoding method and a video codec. The intra-frame image predictive encoding and decoding method comprises the following steps that intra-frame image predictive encoding is conducted by the adoption of an chromaticity intra-frame prediction mode; a reconstruction value of a luminance component Y of a transformation unit (TU) is acquired; a chromaticity component U of the current TU is predicted by the means of the reconstruction value of the luminance component Y of the current TU; a reconstruction value of the chromaticity component U of the current TU is acquired; a chromaticity component V of the current TU is predicted by the means of the reconstruction value of the chromaticity component U of the current TU. According to the intra-frame image predictive encoding and decoding method and the video codec, relevance between the chromaticity component V and the chromaticity component U can be fully used, and therefore predictive encoding and decoding efficiency of intra-frame images is improved.

Description

technical field [0001] The present invention relates to the technical fields of image video codec and intra-frame image prediction, in particular to an intra-frame image predictive codec method and a video codec. Background technique [0002] YUV is a color coding method adopted by the European television system and a color space adopted by the color television system. Among them, Y is the luminance component, representing the brightness (Luma), that is, the gray scale value; and U and V are the chroma components, representing the chroma (Chroma), which is used to describe the color and saturation of the image. Specifies the color of the pixel. The importance of using the YUV color space is that its luminance component Y is separated from the chrominance component U and the subscale component V. If there is only the luminance component Y without the chrominance component U and the chrominance component V, then the image represented in this way is a black and white grayscal...

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N11/02H04N19/593
Inventor 贾杰刘鸿彬
Owner LG ELECTRONICS (CHINA) R&D CENT CO LTD
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