A coding method and device based on adaptive quantization parameters

Abstract

Embodiments of the invention provide an adaptive quantization parameter based coding method and device. The method includes obtaining the quantization parameters of a to-be-coded coding unit; performing coding on the to-be-coded coding unit to obtain a coding result including multiple quality values according to preset quality threshold values, preset coding unit sizes and the quantization parameters; comparing the quality values with the threshold values, reducing the quantization parameters when a quality value does not meet a preset first quality judgment condition, and recoding the to-be-coded coding unit until the coding result meets the preset first quality judgment condition; and increasing the quantization parameters when all the quality values meet the preset first quality judgment condition and one quality value does not meet a preset second quality judgment condition, and recoding the to-be-coded coding unit until the coding result meets the first quality judgment conditionand the second quality judgment condition.

Description

technical field [0001] The present invention relates to the field of video coding, in particular to a coding method and device based on adaptive quantization parameters. Background technique [0002] With the development of Internet and digital multimedia technology, video applications have penetrated into every corner of people's work and life, such as video conferencing, shooting, watching, downloading and transmitting video images and so on. Video application has become the biggest hotspot in the field of Internet and digital multimedia. [0003] The main problem in video applications lies in video encoding and decoding, especially in the process of video encoding. The original image needs to be encoded and compressed into encoded images that occupy less space for network storage or network transmission. Therefore, how to obtain higher video encoding Compression efficiency becomes the primary issue in the field of video coding. In the process of video encoding, the dete...

AI Technical Summary

Problems solved by technology

When this method obtains an encoding result with high overall compression efficiency, the encoding process uses a fixed value for the QP of each coding unit, but this value setting method may cause excessive distortion of some coding units, affecting the overall encoding of the video image Therefore, it cannot meet the requirements of specific application scenarios for encoding quality, such as high-definition video application scenarios, etc.

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