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Coding and decoding method and device and storage medium

A decoding method and encoding technology, applied in the fields of devices, storage media, and encoding and decoding methods, can solve the problems of multiple context models and large memory overhead

Active Publication Date: 2020-02-11
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides an encoding and decoding method and storage medium, which can be used to solve the problems of many context models and large memory overhead in the encoding and decoding process existing in related technologies

Method used

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  • Coding and decoding method and device and storage medium
  • Coding and decoding method and device and storage medium
  • Coding and decoding method and device and storage medium

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Embodiment 1

[0653] In another embodiment, an encoding method is also provided, the encoding method is applied to the encoding end, and the encoding method includes the following steps:

[0654] Step 1: If the current block starts conventional intra prediction, when the target prediction mode of conventional intra prediction comes from the MPM list, the current block is a luma block, then when predicting the current block according to conventional intra prediction, if the current The target prediction mode activated by the block comes from the MPM list, and the index information of the target prediction mode activated by the current block in the MPM list is determined.

[0655] Step 2: Encode the prediction mode index information according to the index information of the target prediction mode started by the current block in the MPM list, where the first bit of the prediction mode index information is based on a context model for context-based adaptation It is obtained by binary arithmetic...

Embodiment 2

[0662] In another embodiment, an encoding method is also provided, the encoding method is applied to the encoding end, and the encoding method includes the following steps:

[0663] Step 1: If the current block starts conventional intra prediction, when the target prediction mode of conventional intra prediction comes from the MPM list, the current block is a luma block, then when predicting the current block according to conventional intra prediction, if The target prediction mode activated by the current block is in the MPM list, then determine the index information of the target prediction mode activated by the current block in the MPM list.

[0664] Step 2: Index information in the MPM list according to the target prediction mode activated by the current block, and encode the prediction mode index information, wherein all bits of the prediction mode index information are obtained based on bypass binary arithmetic coding.

[0665] As an example, if the current block starts ...

Embodiment 3

[0671] In another embodiment, an encoding method is also provided, the encoding method is applied to the encoding end, and the encoding method includes the following steps:

[0672] Step 1: If the current block starts conventional intra prediction, when the target prediction mode of conventional intra prediction comes from the MPM list, and the current block is a luma block, then when predicting the current block according to conventional intra prediction, according to the current block Whether the target prediction mode of the started regular intra prediction is the planar prediction mode, and encode the planar indication information, wherein the planar indication information is used to indicate whether the target prediction mode started by the current block is the planar prediction mode, and the planar indication information is based on a The context model is obtained by context-based adaptive binary arithmetic coding.

[0673] In another embodiment, a decoding method is als...

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Abstract

The invention discloses an encoding and decoding method and device and a storage medium, and belongs to the technical field of image processing. The method comprises the following steps: when it is determined to encode or decode the first ISP indication information, the first ISP indication information is encoded. Based on a context model, context-based adaptive binary arithmetic coding or context-based adaptive binary arithmetic decoding is carried out on first ISP indication information, and the first ISP indication information is used for indicating whether an intra-frame sub-block prediction mode is started or not; and when determining to encode or decode the second ISP indication information, bypass-based binary arithmetic encoding or decoding is performed on the second ISP indicationinformation, and the second ISP indication information is used for indicating a sub-block division mode of an intra-frame sub-block prediction mode, so that the number of context models required in encoding and decoding processes can be reduced, the complexity of the encoding and decoding processes is reduced, and the memory overhead is reduced.

Description

[0001] This application is a divisional application of an invention patent application with an application date of June 21, 2019, an application number of 201910545251.0, and an invention title of "A Codec Method, Device, and Storage Medium". technical field [0002] The present application relates to the technical field of image processing, and in particular to a codec method, device and storage medium. Background technique [0003] At present, in the field of image coding and decoding technology, when encoding an image block, the encoding end usually needs to use the context model to encode some syntax elements, so that these syntax elements can be carried in the encoding stream of the image block and sent to the decoding end. After decoding and receiving the coded stream of the image block, these syntax elements need to be parsed according to the same context model as that of the encoder, so as to reconstruct the image based on these syntax elements. These syntax elements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/13H04N19/159H04N19/122H04N19/186H04N19/52
CPCH04N19/186H04N19/593H04N19/70H04N19/176H04N19/91H04N19/13H04N19/159H04N19/11H04N19/119H04N19/103H04N19/147H04N19/18
Inventor 徐丽英
Owner HANGZHOU HIKVISION DIGITAL TECH