An optimization method and system for an avs2 quantization module and an inverse quantization module
An optimization method and inverse quantization technology, applied in the field of audio and video encoding and decoding, can solve the problems of reducing the speed of AVS2 encoding and decoding, consuming a lot of time, etc., to save arithmetic operations, improve encoding efficiency, and save a lot of complex arithmetic operations.
Active Publication Date: 2019-04-23
SUN YAT SEN UNIV
View PDF14 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Since each prediction mode will perform transformation and quantization and inverse quantization and inverse transformation operations on the prediction residual coefficients, performing complex arithmetic operations on each coefficient during quantization and inverse quantization will consume a lot of time, thereby greatly reducing AVS2 codec speed
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0052] Such as figure 1 Shown, the optimization method of a kind of AVS2 quantization module, this method comprises:
[0053] calculating the threshold of the transform coefficient when the quantized value is 0, and using the calculated threshold as the first threshold;
[0054] calculating the threshold of the transform coefficient when the quantized value is 1, and using the calculated threshold as a second threshold;
[0055] The calculated first threshold and the second threshold are used to perform numerical judgment on each transform coefficient, and corresponding quantization processing is performed on the transform coefficient according to the judgment result. The threshold of the transform coefficient when the quantized value is 0 specifically refers to the threshold (threshold0) when the transform coefficient just becomes 1 after quantization; the threshold of the transform coefficient when the quantized value is 1, which Specifically, it refers to the threshold (t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method and a system for optimizing an AVS2 quantization module and an inverse quantization module. The optimization method for the AVS2 quantization module comprises steps that value determination for each transformation coefficient is carried out through utilizing a first threshold and a second threshold acquired through calculation, and corresponding quantization processing on the transformation coefficients is carried out according to a determination result. The optimization method for the inverse quantization module comprises steps that value determination for quantization coefficients is carried out, no operation is for the quantization coefficients with values of 0 according to the determination result, inverse quantization calculation for the quantization coefficients with absolute values smaller than 2 is carried out through utilizing checked-out reference values, an inverse quantization formula is utilized to carry out inverse quantization calculation for the quantization coefficients with absolute values not smaller than 2. Through the method and the system, large-scale complex arithmetic operation can be omitted, and thereby coding efficiency is effectively improved. The method and the system for optimizing the AVS2 quantization module and the inverse quantization module can be widely applied to the AVS2 coding / decoding field.
Description
technical field [0001] The invention relates to audio and video codec technology, in particular to an optimization method and system for an AVS2 quantization module and an inverse quantization module. Background technique [0002] AVS2 is a new generation of audio and video coding standards independently developed by my country after AVS, and it is the abbreviation of the "Efficient Multimedia Coding for Information Technology" standard. Its goal is: under the condition that the mainstream technology can achieve, when the subjective quality of the reconstructed video is consistent, the coding efficiency of AVS2 for high-definition or higher resolution video is at least 1 times higher than the best performance of AVS1. Under the mainstream encoding configuration, the efficiency is higher than the latest international standard HEVC / H.265. AVS2 is equivalent to the latest international coding standard HEVC / H.265 for conventional video coding efficiency, nearly double the codin...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/124H04N19/122
CPCH04N19/122H04N19/124
Inventor 梁凡曾昊峰
Owner SUN YAT SEN UNIV