Encoding method, device and storage medium for string encoding technology

Abstract

The present application discloses an encoding method, device and storage medium based on the string encoding technology. Wherein, the encoding method based on the string encoding technology includes: in response to the type of the current string being a CU-level string; obtaining the abscissa and the ordinate of the current string, and judging whether the ordinate of the current string is less than one and whether the abscissa of the current string is equal to zero; If not, judge whether the ordinate of the string vector of the current string is non-zero; if the ordinate of the string vector is zero, then encode the difference between the absolute value of the abscissa of the string vector and the second preset value; in response to the current string The length of the current string is less than the width of the current CU block, and the second preset value is the length of the current string. In response to the length of the current string being greater than or equal to the width of the current CU block, the second preset value is the first preset value plus one, and the first The preset value is less than or equal to the absolute value of the abscissa of the string vector and the width of the current CU block. The method optimizes the string vector encoding for the CU-level string, and can reduce the number of encoded bits under the condition that the distortion remains unchanged, thereby improving the compression rate of SP prediction.

Description

technical field [0001] The present application belongs to the technical field of video coding, and specifically relates to a coding method, device and storage medium of the string coding technology. Background technique [0002] The amount of video image data is relatively large, and it is usually necessary to compress the video pixel data (RGB, YUV, etc.), and the compressed data is called a video stream. The video stream is transmitted to the user through a wired or wireless network, and then decoded watch. The entire video coding process includes prediction, transformation, quantization, coding and other processes. [0003] SP technology (string matching prediction technology) is an independent prediction technology, which is aimed at the situation where different areas in an image have the same image content. Consecutive n (n>=1) pixels in the current block are called a string, there can be several different strings in the current block, each string has its own SV (...

AI Technical Summary

Problems solved by technology

However, the current SP technology has the problem of low compression rate.

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