High performance video encoding improvement method based on frame rate conversion

Abstract

The invention provides a high performance video encoding method in combination with frame rate conversion for the HEVC encoding standard. The method mainly comprises the following steps: performing self-adaptive frame-extracting on an original video at an encoding end to lower the transmission data amount; performing HEVC encoding on a low frame rate video, performing motion vector estimation on a lost frame in combination with the reference frame motion vector extracted from the code stream and the intra-frame blocking information, and then reconstructing the lost frame through the improved two-way motion compensation inserting frame based on block coverage in combination with the above mentioned motion vector at a decoding end. The transmission data amount is lowered due to self-adaptive frame-extraction, and the transmission bandwidth is saved; plenty of time is saved since the process of performing repeated motion estimation on the decoded video is omitted; and the quality of the reconstructed video is guaranteed due to the improved two-way motion compensation inserting frame based on block coverage. An experimental result shows that the algorithm provided by the invention saves about 15% of code rate in the premise of guaranteeing that the reconstructed video PSNR approaches to consistency at a middle and low code rate end, and the encoding time is saved nearly 40% at the same time.

Description

technical field [0001] The present invention relates to the problem of reducing the video coding rate in the field of image communication, and mainly relates to a method for reducing the coding rate by combining the high-performance video coding standard HEVC with video frame rate conversion. Background technique [0002] With the popularization and development of high-definition digital television (HDTV) and high-end multimedia systems, people have higher and higher requirements for the subjective enjoyment of videos, which put forward higher requirements for the quality of video program sources. The higher the video data volume, the greater the bandwidth required for transmission. At the same time, video coding standards are constantly being updated. After the development and improvement of video coding standards such as MPEG and H.264 / AVC, a new generation of video coding standards HEVC has also been released. And compared with H.264 / AVC, the HEVC coding standard saves n...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of holes and block effects in the reconstructed frame in the traditional frame rate increase process, improve the performance of video compression coding and improve the quality of the reconstructed video, the present invention proposes an improved method for high-performance video compression coding combined with frame rate conversion. Under the premise of video quality, the video encoding bit rate is reduced, and it has a good application prospect in the real-time transmission system with limited bandwidth

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