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Image coding, decoding method and device

An image encoding and encoding method technology, applied in the field of digital video compression encoding and decoding systems, can solve the problems of poor screen image compression efficiency and other problems, and achieve the effect of improving the compression effect

Active Publication Date: 2020-01-07
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The present invention provides an image encoding and decoding method and device to at least solve the problem in the related art that the screen image compression efficiency is not good due to the mixing of image areas

Method used

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  • Image coding, decoding method and device
  • Image coding, decoding method and device
  • Image coding, decoding method and device

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0240] In the code stream data of an encoded block or decoded block or PU or CU or CTU or LCU, there are three types of copy parameters: the copy parameters of the reference string, the copy parameters of the reference rectangle, and the copy parameters of the reference point; mixed Encoding or decoding of three types of copy methods: string copy, rectangle copy, point copy.

Embodiment approach 2

[0242] In the code stream data of an encoded block or decoded block or PU or CU or CTU or LCU, there are two types of copy parameters mixed: the copy parameters of the reference string and the copy parameters of the reference point; the two types of copy methods are mixed Encoding or decoding: string copy, point copy.

[0243] A preferred implementation of the placement order of the syntax elements of the copy parameters in the code stream

[0244] The order in which the syntax elements describing the copy parameters (the syntax elements are shown in bold) in the code stream is:

[0245] Copy parameter 1, copy parameter 2, copy parameter 3, ..., copy parameter i, copy parameter i+1, ...

[0246] A preferred implementation of the constituent fields of the copy parameter

[0247] A replicated parameter consists of several replicated sub-parameter domains, including but not limited to:

[0248] Copy sub-parameter field 1: copy type, indicating whether the copy method is string...

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Abstract

A method and a device for image encoding and decoding, the method comprising: encoding an encoding block, and encoding the pixels therein using various types of encoding methods to generate various types of encoding results and code stream data; mixing the various types of code stream data to form part or all of the code stream data of the encoding block; alternatively, parsing the code stream to obtain a decoding parameter for a decoding block; according to the decoding parameter, decoding the code stream of the different parts of the decoding block using various decoding methods, thus solving the problem of low screen image compression efficiency of a mixed image area, and improving the compression effectiveness.

Description

technical field [0001] The present invention relates to a digital video compression encoding and decoding system, in particular to an image encoding and decoding method and device. Background technique [0002] With the development and popularization of a new generation of cloud computing and information processing models and platforms with remote desktops as typical manifestations, the communication between multiple computers, between computer hosts and other digital devices such as smart TVs, smart phones, and tablets, and between various The interconnection between various digital devices has become a reality and is becoming a mainstream trend. This makes the real-time screen transmission from the server end (cloud) to the client end an urgent need at present. Due to the large amount of screen video data that needs to be transmitted, taking the 24-bit true-color screen image of a tablet computer with a resolution of 2048x1536 pixels and a refresh rate of 60 frames per se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/129H04N19/174H04N19/176H04N19/186H04N19/70H04N19/96
CPCH04N19/00
Inventor 林涛李明尚国强吴钊
Owner TONGJI UNIV