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Mode information coding and decoding method and device

A technology of mode information and coding method, applied in the field of multimedia communication, can solve the problem of changing the number, and achieve the effect of good support effect, improved coding efficiency, good scalability and easy modification.

Active Publication Date: 2014-10-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, when M changes, the number of bins after mode binarization may change

Method used

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  • Mode information coding and decoding method and device
  • Mode information coding and decoding method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] An embodiment of the present invention provides a preferred encoding method for video sequence mode information.

[0053] The encoding method of video sequence mode information provided by this embodiment at least includes the following steps:

[0054] Step 1. Use the syntax element A to represent the maximum number M of the types of pattern information, where M is a positive integer;

[0055] Step 2, use the syntax element B to represent the value of the pattern information, determine the binarization process of the syntax element B according to the maximum number M of the pattern information types and binarize the syntax element B into a bin string;

[0056] Step 3. Write the binarization results of the syntax element A and the syntax element B into the code stream. In this embodiment, the mode information can be, for example, the direction information in the chain code. Specifically in this embodiment, the encoding method at least includes the following steps:

[...

Embodiment 2

[0081] An embodiment of the present invention provides a method for decoding video sequence mode information.

[0082] The decoding method process of the video sequence mode information provided by this embodiment at least includes the following steps:

[0083] Step 1. Parse the value of the syntax element A from the code stream, and obtain the maximum number M of the types of mode information from the value of the syntax element A, where M is a positive integer;

[0084] Step 2. Obtain the bin string corresponding to syntax element B from the code stream, determine the debinarization process according to M, and debinarize the bin string using the debinarization process to obtain the syntax element B , to get the schema information. Preferably, in the step 1, the syntax element A can be obtained from the following positions:

[0085] (1) Video parameter set;

[0086] (2) Sequence parameter set;

[0087] (3) Image parameter set;

[0088] (4) strip head;

[0089] (5) Strip...

Embodiment 3

[0105] The embodiment of the present invention provides a preferred video sequence code stream including mode information.

[0106] The video sequence code stream includes: a syntax element A and a syntax element B, wherein the syntax element A represents the maximum number M of types of the mode information, the syntax element B represents the value of the mode information, and the binarization of the syntax element B The process is determined by M, where M is a positive integer.

[0107] Preferably, the syntax element A can be included in the following structure in the code stream:

[0108] (1) Video parameter set;

[0109] (2) Sequence parameter set;

[0110] (3) Image parameter set;

[0111] (4) strip head;

[0112] (5) Strip content.

[0113] Preferably, the relationship between the syntax element A and the maximum number of types of pattern information includes the following:

[0114] (1) The value of the syntax element A is equal to M;

[0115] (2) The value of t...

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Abstract

The invention discloses a mode information coding and decoding method and device. The decoding method comprises obtaining a grammar element A from a code stream and obtaining the maximum quantity of the types of the mode information through the grammar element A; determining the anti-binaryzation process of a grammar element B through the maximum quantity; and obtaining the mode information through the anti-binaryzation. The coding method comprises utilizing the grammar element A to express the maximum quantity M of the types of the mode information; utilizing the grammar element B to express the value of the mode information; determining the binaryzation process of the grammar element B according to the maximum quantity M of the types of the mode information and binarizing the grammar element B into a bin string; and writing the grammar element A and the binaryzation result of grammar element B into the code stream. The method helps to solve the technical problems of low coding and decoding efficiency and poor expansibility and modification since the maximum quantity of the types of the mode information need to be predetermined at the coding and decoding end in the prior art.

Description

technical field [0001] The present invention relates to the field of multimedia communication, in particular to a method for encoding and decoding video sequence mode information and a corresponding device. Background technique [0002] ●Video coding layered structure [0003] When using coding standards such as H.264 / AVC and the latest HEVC, a frame of image can be divided into multiple slices, and each slice is encoded and decoded separately. Encoding a slice generates a slice code stream, and the slice code stream also includes some encoding parameters of the slice, such as the serial number of the parameter set referenced by the slice. In the hierarchical structure in H.264 / AVC, two-level parameter sets, image parameter set and sequence parameter set, are used to describe some parameters of the video sequence. A sequence parameter set can be referenced by an image parameter set, and an image parameter set can be referenced by a slice. Through this mechanism, a slice ca...

Claims

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Application Information

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IPC IPC(8): H04N19/13H04N19/70
Inventor 虞露吕鹏
Owner ZHEJIANG UNIV