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HEVC-based intra-frame predictive decoding method and device

A technology for intra-frame prediction and intra-frame prediction mode, which is applied in the field of video coding and decoding, and can solve the problems of multiple processing branches and low efficiency.

Inactive Publication Date: 2016-12-21
ALIBABA (CHINA) CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an HEVC-based intra-frame predictive decoding method and device, which is used to solve the problem of many processing flow branches and low efficiency of the intra-frame predictive decoding method in the prior art

Method used

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  • HEVC-based intra-frame predictive decoding method and device
  • HEVC-based intra-frame predictive decoding method and device
  • HEVC-based intra-frame predictive decoding method and device

Examples

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no. 1 example

[0029] This embodiment provides an HEVC-based intra prediction decoding method, which is applied to an angle intra prediction mode, figure 1 is the flowchart of the method, such as figure 1 As shown, the method includes the following processing:

[0030] Step 102: call a pre-set intra prediction function corresponding to the color component index, intra prediction mode, and prediction block size according to the color component index, intra prediction mode, and prediction block size;

[0031] Step 103: Use the called intra-frame prediction function to perform intra-frame prediction processing on multiple pixels;

[0032] Preferably, in this embodiment, the name of the intra prediction function carries the identification information of the color component index, the identification information of the intra prediction mode, and the identification information of the size of the prediction block, and the parameters of the intra prediction function include a fixed Numerical color ...

no. 2 example

[0054] For each intra prediction function, the chrominance index c_idx, the intra prediction mode mode and the size of the prediction block are fixed, so the values ​​of angle and inv_angle are also fixed.

[0055] The processing procedure of the HEVC-based intra prediction decoding method provided in this embodiment is as follows:

[0056] 1) According to the standard, calculate the value of the reference pixel ref:

[0057] Since the intra prediction mode is fixed for each individual intra prediction function, the angle value is also fixed, and there is no need to look up the table;

[0058] Since the angle value is fixed in each individual processing function, there is only one process in the process of calculating the reference pixel, and there are no multiple branches in the original algorithm;

[0059] According to the prediction mode corresponding to different processing functions, use the parallel storage instruction to save the reference pixel ref vector to the speci...

no. 3 example

[0083] This embodiment provides an HEVC-based intra prediction decoding device, which is applied to an angle intra prediction mode, image 3 is the block diagram of the device, such as image 3 As shown, the device 30 includes the following components:

[0084] The calling module 31 is used to call a preset intra prediction function corresponding to the color component index, the intra prediction mode and the size of the prediction block according to the color component index, the intra prediction mode and the size of the prediction block;

[0085] A processing module 32, configured to perform intra-frame prediction processing on multiple pixels by using the called intra-frame prediction function;

[0086] Wherein, the processing module 32 is specifically configured to perform the following operations:

[0087] Calculating the reference pixel value of the predicted block;

[0088] For the corresponding intra prediction function when the prediction mode is greater than or eq...

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Abstract

The aim of the invention is to provide an HEVC-based intra-frame predictive decoding method and a device, which are used for solving the problems of the intra-frame predictive decoding method in present technology, such as too many processing flow branches and low efficiency. Applied to the angular intra-frame predictive mode, the method comprises the following steps: invoking preset intra-frame predictive parameters that are corresponding to the colour component index, the intra-frame predictive mode and the size of the predictive block according to the colour component index, the intra-frame predictive mode and the size of the predictive block; and carrying out an intra-frame predictive process upon multiple pixels by the invoked intra-frame predictive parameters. Through the method, the invention can increase the parallelization degree of data, reduce code branches and improve the use ratio of the assembly line of a processor.

Description

technical field [0001] The present invention relates to the field of video coding and decoding, in particular to an HEVC (High Efficiency Video Coding, high-efficiency video coding)-based intra-frame predictive decoding method and device. Background technique [0002] Factors such as the ever-expanding demand for video services, the ever-increasing popularity of high-definition video, the emergence of ultra-clear video (such as 4K and 8K), the explosive growth of mobile video applications, and limited bandwidth resources all pose challenges to video coding efficiency. higher requirements. In the field of video codec, complexity control has an important impact on video codec. Complexity control refers to reducing the codec complexity to a specified target complexity, and the video distortion caused by this complexity reduction is minimal. [0003] In the evolution process of video coding, along with the continuous improvement of coding efficiency, the complexity of video co...

Claims

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Application Information

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IPC IPC(8): H04N19/593H04N19/186H04N19/436H04N19/44
CPCH04N19/186H04N19/436H04N19/44H04N19/593
Inventor 吴建平李庆燕顾思斌潘柏宇王冀
Owner ALIBABA (CHINA) CO LTD
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