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Prediction mode decoding and coding method and device

A technology of prediction mode and decoding method, which is applied in the field of video image coding and decoding, can solve the problems of low efficiency of coding and decoding prediction mode, achieve the effect of saving coding bits and improving the performance of coding and decoding

Pending Publication Date: 2022-06-07
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]In this method, the decoding end needs to decode the control switch flag bit to determine whether the prediction mode is enabled for the current block, resulting in low efficiency of encoding and decoding prediction modes

Method used

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  • Prediction mode decoding and coding method and device
  • Prediction mode decoding and coding method and device

Examples

Experimental program
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Effect test

example 1

[0185] Example 1. When the prediction mode is the UMVE mode, the restriction condition that it allows to be enabled includes that the sequence-level switch of the UMVE mode is in an open state.

[0186] Exemplarily, for the UMVE mode, it may be determined according to the switch restriction condition whether it satisfies the restriction condition for enabling activation.

[0187] If the sequence level switch of the UMVE mode is in the ON state, it is determined that the UMVE mode is allowed to be enabled, that is, the UMVE mode is available; otherwise, it is determined that the UMVE mode is not allowed to be enabled, that is, the UMVE mode is unavailable.

example 2

[0188] Example 2. When the prediction mode is the AWP mode, the restrictions that are allowed to be enabled include one or more of the following:

[0189] The sequence-level switch of the AWP mode is on, the product of the width and height of the current block is greater than or equal to the first size threshold, the width of the current block is less than or equal to the first width threshold, the height of the current block is less than or equal to the first height threshold, and The frame type of the frame to which the current block belongs is a B frame.

[0190] Exemplarily, for the AWP mode, it may be determined whether it satisfies the restriction conditions for enabling activation according to the switch restriction condition, the size restriction condition and the frame type restriction condition.

[0191] If the sequence level switch of the AWP mode is on, and the product of the width and height of the current block is greater than or equal to the first size threshold...

example 3

[0193] Example 3. When the prediction mode is the ETMVP mode, the restrictions that are allowed to be enabled include one or more of the following:

[0194] The sequence level switch of the ETMVP mode is on, the width of the current block is greater than or equal to the second width threshold, and the height of the current block is greater than or equal to the second height threshold.

[0195] Exemplarily, for the ETMVP mode, it may be determined whether it satisfies the restriction conditions for enabling activation according to the switch restriction conditions and the size restriction conditions.

[0196] If the sequence level switch of the ETMVP mode is on, and the width of the current block is greater than or equal to the second width threshold, and the height of the current block is greater than or equal to the second height threshold, it is determined that the restriction conditions for enabling the ETMVP mode to be met are satisfied, that is, ETMVP The mode is availabl...

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Abstract

The invention provides a prediction mode decoding and coding method and device, and the prediction mode decoding method comprises the steps: judging whether a current block meets a decoding-free condition of a to-be-decoded mode flag bit or not according to the specific information of the current block before the binary coding information of the to-be-decoded mode flag bit is decoded for the current block; if the current block meets the decoding-free condition of the to-be-decoded mode flag bit, determining a binarization value of the to-be-decoded mode flag bit as a first value or a second value according to the specific information; and if the current block does not meet the decoding-free condition of the to-be-decoded mode flag bit, reading binarization coding information of the to-be-decoded mode flag bit, decoding the coding information, and determining a binarization value of the to-be-decoded mode flag bit as a first value or a second value. The method can improve coding and decoding performance.

Description

technical field [0001] The present application relates to video image encoding and decoding technologies, and in particular, to a prediction mode decoding and encoding method and device. Background technique [0002] Prediction mode refers to the mode in which image blocks in a video frame are decoded or encoded. Since the prediction mode includes multiple modes, a control switch flag bit is configured for each prediction mode to control whether the corresponding prediction mode is enabled by the switch flag bit. The coding end uses the coding control switch flag bit to indicate which prediction mode is enabled for the image block. The decoding end may decode the coding of the flag bit of the control switch to determine the prediction mode adopted by the image block. [0003] In the related art, when encoding the current block, for any prediction mode, the encoder determines whether the prediction mode is enabled, if enabled, the control switch flag bit of the encoding pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/159H04N19/147
CPCH04N19/159H04N19/147
Inventor 陈方栋曹小强孙煜程
Owner HANGZHOU HIKVISION DIGITAL TECH