A mixed resolution encoding and decoding method and device

Abstract

The embodiment of the present invention discloses that the embodiment of the present invention provides a mixed-resolution encoding and decoding method, the method includes: performing standard full-resolution encoding on the I frame in the video frame sequence that only adopts intra-frame encoding and performing frame Reconstruct and obtain the reconstructed frame of the I frame; down-sample the reconstructed frame of the I frame to obtain a sampled image of the reconstructed frame of the I frame; down-sample the non-I frame in the video frame sequence to obtain the The sampled image of the non-I frame; the sampled image of the reconstructed frame of the I frame corresponding to the non-I frame is used as a reference frame to perform standard encoding on the sampled image of the non-I frame; a video code stream is sent, and the video code stream includes The encoded I frame and non-I frame. The embodiment of the invention also discloses a mixed resolution coding method and a corresponding codec device. By adopting the present invention, the computational complexity of encoding and decoding can be reduced, and the speed and efficiency at both ends of encoding and decoding can be greatly improved.

Description

technical field [0001] The present invention relates to the field of video coding and decoding, in particular to a mixed resolution coding and decoding method and device. Background technique [0002] With the improvement of processor capabilities and the reduction of memory costs, the network support for encoding video is changing and the rapid development of compression encoding technology, the new generation of video encoding standard H.264 / AVC aims to fully improve the encoding efficiency and enhance the stability of the network environment (Advanced Video Coding, advanced video coding) by the International Telecommunication Union Standardization Organization ITU-T (International Telecommunications Union-Telecommunications Standardization Sector, the telecommunication standardization organization under the management of the International Telecommunication Union) video coding expert group and ISO (International Standard Organized, International Organization for Standardiza...

AI Technical Summary

Problems solved by technology

However, when encoding low-resolution video using the H.264 / AVC standard in the prior art, since all frames are encoded at low resolution, the amount of existing information that can be used for super-resolution restoration after decoding is limited, so the image poor quality

Moreover, all P frames are used as the reference frame before the forward frame, and the forward / backward frame of the B frame is used as the reference frame. In this way, the P frame used as the reference frame needs to be sub-pixel interpolated by the encoder, and it must be de-interpolated after encoding. Block effect filtering to reduce the error propagation of encoding, this part also has high complexity

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