Maximum available coding unit size determining method and device

Abstract

The embodiment of the invention discloses a maximum available coding unit size determining method and device. The method includes the following steps: obtaining an image to be encoded; determining a similar image corresponding to the image to be encoded; extracting target use information of a coding unit corresponding to a predetermined coding unit attribute value in the similar image according topre-statistical information; and determining a maximum available coding unit size of the image to be encoded according to the target use information and the predetermined coding unit attribute value,wherein the pre-statistical information includes use information of the coding unit corresponding to the predetermined coding unit attribute value in the encoded image; the predetermined coding unitattribute value at least includes a coding unit attribute value corresponding to the coding unit with a maximum size, and all coding unit attribute values included by the predetermined coding unit attribute value are continuous in size; and a predetermined coding unit attribute refers to the coding unit size or depth. According to the scheme, the complexity of CU partitioning decisions of HEVC canbe reduced, and the video coding speed can be improved.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a method and device for determining the size of a maximum available coding unit. Background technique [0002] With the continuous development of video services in multimedia applications and the continuous improvement of video cloud computing requirements, the data volume of the original video source is too large for the existing transmission network bandwidth and storage resources. One of the hotspots of research and application. [0003] Standardization organizations at home and abroad have formulated a variety of video coding standards. Most of these standards use techniques such as prediction, transformation, scanning, quantization, and entropy coding to remove redundant information in video image data to reduce transmission bandwidth and storage space. The basic unit to which the above technology is applied is called CU (Coding Unit, coding unit), which repres...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the size of the largest available CU is often determined according to the image resolution. Specifically, in an image with a small resolution, a 64x64 area generally does not contain one object but contains multiple objects. Therefore, when encoding In the process, when the image resolution is less than the preset threshold (such as 832×480), the 64×64 CU is turned off, and multiple smaller-sized CUs are used for encoding, that is, the maximum available CU size corresponding to the image is determined is 32×32, but applying this method has almost no effect on the CU decision of video images whose resolution is greater than the preset threshold, resulting in a small increase in video encoding speed

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