Mixture resolution encoding and decoding method and device

Abstract

An embodiment of the invention provides a mixture resolution encoding and decoding method. The mixture resolution encoding and decoding method comprises performing full resolution standard encoding and frame reconstruction on video frame sequence I frames which only adopt intraframe coding and obtaining reconstructed frames of the I frames; performing down sampling on the reconstructed frames of the I frames and obtaining sampling images of the reconstructed frames of the I frames; performing down sampling on non-I frames in a video frame sequence and obtaining sampling images of the non-I frames; performing standard encoding on the sampling images of the non-I frames with the sampling images of the reconstructed frames of the I frames which are corresponding to the non-I frames serving as reference frames; sending video code frames which comprise the I frames and non-I frames which are obtained through encoding. The invention also discloses a corresponding mixture resolution encoding and decoding device. According to the mixture resolution encoding and decoding method and device, encoding and decoding calculation complexity can be reduced and encoding and decoding speed and efficiency are 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, It was proposed by the Joint Video Coding...

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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