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Coding and decoding method, device and equipment

A sub-region and motion information technology, applied in the field of coding and decoding, to improve coding performance, solve the problem of transmitting a large amount of motion information, and save a lot of bits

Active Publication Date: 2021-11-26
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the current coding unit is divided into multiple sub-blocks, additional bit overhead will be generated

Method used

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  • Coding and decoding method, device and equipment
  • Coding and decoding method, device and equipment
  • Coding and decoding method, device and equipment

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0058] Embodiment 1: see Figure 4 As shown, it is a schematic flow chart of the encoding and decoding method proposed in the embodiment of the present application. The method can be applied to the decoding end or the encoding end, and the method can include the following steps:

[0059] Step 401, if the target motion information prediction mode of the current block is the motion information angle prediction mode, divide the current block into at least one sub-region; for each sub-region of the current block, according to the pre-configured angle direction of the motion information angle prediction mode The motion information of multiple surrounding matching blocks is determined to determine the motion information of the sub-region.

[0060] Step 402: Determine the motion compensation value of the sub-area according to the motion information of the sub-area.

[0061] Step 403, if the sub-region satisfies the condition of using bidirectional optical flow, obtain the bidirectio...

Embodiment 2

[0105] Embodiment 2: Based on the same application concept as the above-mentioned method, see Image 6 As shown, it is a schematic flow chart of the encoding and decoding method proposed in the embodiment of the present application. This method can be applied to the encoding end, and the method can include:

[0106] In step 601, the encoder builds a motion information prediction mode candidate list for the current block, and the motion information prediction mode candidate list may include at least one motion information angle prediction mode. Of course, the motion information prediction mode candidate list may also include other types of motion information prediction modes (that is, not the motion information angle prediction mode), which is not limited.

[0107]Exemplarily, a motion information prediction mode candidate list can be constructed for the current block, that is, all sub-regions in the current block can correspond to the same motion information prediction mode ca...

Embodiment 3

[0118] Embodiment 3: based on the same application concept as the above-mentioned method, see Figure 7 As shown, it is a schematic flow chart of the encoding and decoding method proposed in the embodiment of the present application. The method can be applied to the decoding end, and the method can include:

[0119] In step 701, the decoder constructs a motion information prediction mode candidate list of the current block, and the motion information prediction mode candidate list may include at least one motion information angle prediction mode. Of course, the motion information prediction mode candidate list may also include other types of motion information prediction modes (that is, not the motion information angle prediction mode), which is not limited.

[0120] In step 702, the decoder selects a target motion information prediction mode of the current block from the motion information prediction mode candidate list, and the target motion information prediction mode may b...

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Abstract

The invention provides a coding and decoding method, device and equipment, and the method comprises the steps: dividing a current block into at least one sub-region if a target motion information prediction mode of the current block is a motion information angle prediction mode; for each sub-region of the current block, determining motion information of the sub-region according to motion information of a plurality of peripheral matching blocks pointed by a pre-configured angle of a motion information angle prediction mode; determining a motion compensation value of the sub-region according to the motion information of the sub-region; if the sub-region meets the condition of using the bidirectional optical flow, acquiring a bidirectional optical flow deviation value of the sub-region; determining a target prediction value of the sub-region according to a forward motion compensation value in the motion compensation values of the sub-region, a backward motion compensation value in the motion compensation values and a bidirectional optical flow deviation value of the sub-region; and determining a predicted value of the current block according to the target predicted value of each sub-region. Through the scheme of the invention, the coding performance can be improved.

Description

technical field [0001] The present application relates to the technical field of encoding and decoding, and in particular, relates to an encoding and decoding method, device and equipment thereof. Background technique [0002] In order to achieve the purpose of saving space, video images are transmitted after being coded, and a complete video coding method may include processes such as prediction, transformation, quantization, entropy coding, and filtering. Predictive coding includes intra-frame coding and inter-frame coding. Inter-frame coding uses the correlation in the time domain of the video to predict the pixels of the current image using the pixels of the adjacent coded image, so as to effectively remove the redundancy of the video time domain. In inter-frame coding, a motion vector is used to represent the relative displacement between the current image block of the current frame video image and the reference image block of the reference frame video image. For examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/176H04N19/513H04N19/44
CPCH04N19/176H04N19/513H04N19/44
Inventor 方树清陈方栋王莉
Owner HANGZHOU HIKVISION DIGITAL TECH
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