Coding and decoding methods and coding and decoding devices

Abstract

The embodiment of the invention discloses coding and decoding methods and coding and decoding devices, relating to image processing technology and aiming to improve the quality of the images displayed when multi-scene display in the meeting places is realized. The coding method comprises the following steps: respectively obtaining a basic layer image and at least a reinforcement layer image in the meeting place scene; and taking the basic layer image as the scaled video coding (SVC) basic layer and the reinforcement layer image as the SVC reinforcement layer to be coded to form coding stream. The embodiment of the invention is mainly applied to video conferences.

Description

technical field [0001] The present invention relates to image processing technology, in particular to a codec method and a codec device. Background technique [0002] In the prior art, the following methods are generally adopted to emphasize some local scenes in the venue. [0003] Method 1: Use resampling technology to display multiple scenes of the venue. [0004] In this way, first cut out the local area that needs to be processed in the venue, and then use the resampling filter to enlarge the cut out local area, so as to realize the emphasis on the local scene of the venue to display multiple scenes of the venue . [0005] The second way is to collect images of different scenes in the venue respectively, and then use different codecs or the same codec to process the images of these different scenes respectively. [0006] Mode 3: Use a single H.264 encoder to divide different areas of the same venue into slices according to quality levels, and encode these slices. [...

AI Technical Summary

Problems solved by technology

[0007] The inventors found that none of these existing technologies can efficiently provide high-quality images displayed in multiple scenes at the same time

For example, for method 1, due to the impact of resampling filter performance, the quality of the partial scene image of the venue after resampling will be lower than the image quality before sampling, and additional resampling is required in this method filter resource

For the second method, since the multiple video streams of the same site use independent codecs, this method takes up more codec resources, and the synchronization between the multiple video streams of the same site is difficult; A codec encodes and decodes multiple video streams sequentially, which will make the multiple video streams have a sequential order and cannot arrive at the same time, and the frame rate of each video stream will drop

For the third method, the effect of zooming in and emphasizing important areas cannot be achieved, and the overall subjective effect of the image is reduced

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