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Video decoding method and device, and video encoding method and device

A technology for video decoding and coding blocks, which is applied in the fields of video decoding methods, video coding methods and devices, and can solve the problem that the video frame coding effect needs to be improved.

Active Publication Date: 2020-06-16
BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0010] The present disclosure provides a video decoding method, a video encoding method and a device to at least solve the problem in the related art that the encoding effect of the ISP mode on the video frame needs to be improved

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  • Video decoding method and device, and video encoding method and device
  • Video decoding method and device, and video encoding method and device
  • Video decoding method and device, and video encoding method and device

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Embodiment approach

[0202] In a possible implementation manner, the transform selection method (see Table 2) of the conventional coding block is extended to the ISP coding block. Specifically, the transform selection method of the conventional coding block remains the same as the existing design in Table 2, while the transform selection method of the ISP coding block is modified as follows: When an ISP coding block is divided into rectangular sub-blocks, DST-VII For the shorter dimension of each sub-block, DCT-II is suitable for the longer dimension of the sub-block; when an ISP coding block is divided into square sub-blocks, DST-VII is suitable for horizontal and vertical directions. Additionally, to avoid introducing a new transform size, DST-VII is only used when the corresponding size of the sub-block is equal to or smaller than 16 (same constraint design in Table 2).

[0203] In another possible implementation manner, the transform selection method (see Table 3) of the ISP coded block is ext...

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Abstract

The disclosure relates to a video decoding method and device, and a video encoding method and device, and belongs to the technical field of video encoding and compression. The video decoding method comprises the following steps: receiving decoding information of an encoding block, wherein the decoding information at least comprises block size information, target division direction information, target prediction mode information, compressed error data and an ISP identifier for indicating that an ISP mode is configured to reconstruct the encoding block; performing sub-block division on the encoding block according to the block size information, the target division direction information and the sub-block division quantity of the configured block size information, predicting sub-blocks obtained by dividing the encoding block according to the target prediction mode information, acquiring a transformation skipping identifier of the encoding block according to the decoding information, determining prediction errors of the sub-blocks according to the transformation skipping identifier and the compressed error data, and decoding the encoding block according to the prediction results and theprediction errors of the sub-blocks. Thus, the ISP mode and the transformation skipping mode can be used in a combined mode, and the encoding effect of the ISP mode is favorably improved.

Description

[0001] This application claims priority to U.S. Patent Application No. 62 / 817,974, entitled "Improvements on Intra Sub-Partition Coding Mode," filed with the U.S. Patent Office on March 13, 2019, the entire contents of which are incorporated by reference at In this application. technical field [0002] The present disclosure relates to the technical field of video encoding and compression, and in particular, to a video decoding method, a video encoding method and a device. Background technique [0003] In the technical field of video coding and compression, multiple video coding technologies can be used to compress video data, and video coding can be performed according to one or more video coding standards, wherein the video coding standard includes a multifunctional video codec ( Versatile Video Coding, VVC), Joint Exploration Model (JEM), High-Efficiency Video Coding (HEVC) (H.265 / HEVC), Advanced Video Coding (AVC) (H.264 / AVC), Moving Picture Expert Group (Moving Picture...

Claims

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Application Information

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IPC IPC(8): H04N19/176H04N19/119H04N19/91H04N19/13H04N19/132H04N19/96H04N19/593H04N19/105H04N19/625
CPCH04N19/176H04N19/119H04N19/91H04N19/13H04N19/132H04N19/96H04N19/593H04N19/105H04N19/625
Inventor 修晓宇陈漪纹王祥林马宗全
Owner BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
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