Adaptive dequantization method and device in video decoding

A video coding and adaptive technology, applied in the field of data processing, can solve problems such as limiting coding efficiency

Active Publication Date: 2016-02-17
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The present invention provides an adaptive inverse quantization method and device in video coding. The method and device provided by the present invention solve the problem in the prior art that the side information corresponding to the quantization parameter limits the improvement of coding efficiency to a certain extent.

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  • Adaptive dequantization method and device in video decoding
  • Adaptive dequantization method and device in video decoding
  • Adaptive dequantization method and device in video decoding

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Embodiment

[0122] Such as figure 1 As shown, an embodiment of the present invention provides an adaptive inverse quantization method in video coding, the method comprising:

[0123] Step 101, determine the image area corresponding to the first transform coefficient set in the current decoded image; the first transform coefficient set includes N transform coefficients, and the transform coefficients are the transform coefficients of any color space component in the current decoded image, wherein, N is a positive integer;

[0124] In the embodiment of the present invention, the first transform coefficient set may include N transform coefficients A(i), i=1, 2,..., N, where N is a positive integer, for example, N=1, 2, 4, 16 . Transform coefficient, transform coefficient of any component of RGB (such as R component).

[0125] The image area corresponding to the first transform coefficient set is the area corresponding to the first transform coefficient set in the current decoded image. Fo...

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Abstract

The invention discloses an adaptive dequantization method and device in video decoding. The method provided by the invention is characterized in that the statistic characteristic of a background area in which a current transform block is positioned is estimated through spatial neighborhood information, time neighborhood information, or the spatial neighborhood information and the time neighborhood information of the transform block, and a quantization regulation factor of dequantization is exported adaptively, so that dequantization processing is regulated flexibly. Compared with an existing scheme of transmitting quantization regulation information in code streams, the method and the device provided by the invention have the advantage that extra bit overhead does not need to be provided to transmit the quantization regulation information, so that the coding efficiency is further increased.

Description

technical field [0001] The invention relates to the field of data processing, in particular to an adaptive inverse quantization method and device in video coding. Background technique [0002] Current video coding technologies include a variety of video coding standards, such as H.264 / AVC, H.265 / HEVC, Audio Video Coding Standard (AVS) and other video coding standards. The above-mentioned video coding standards usually adopt a hybrid coding framework. It mainly includes the following links: [0003] Prediction (prediction), transformation (transform), quantization (quantization), entropy coding (entropycoding) and other links. [0004] In the prediction step, the reconstructed pixels (reconstructed pixels) of the coded area are used to generate predicted pixels (predicted pixels) of the original pixels (original pixels) corresponding to the current coded block. Prediction methods mainly include intraprediction and interprediction. Intra prediction uses the reconstructed pi...

Claims

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Application Information

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IPC IPC(8): H04N19/124H04N19/48H04N19/182H04N19/186H04N19/593
CPCH04N19/126H04N19/136H04N19/176H04N19/18H04N19/60H04N19/119H04N19/124H04N19/182H04N19/186H04N19/184H04N19/30
Inventor 赵寅杨海涛吕卓逸
Owner HUAWEI TECH CO LTD
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