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Multi-frame quality enhancement method and device for lossy compressed video

A quality enhancement, lossless compression technology, applied in the field of image processing, which can solve problems such as performance limitations of adjacent frames

Active Publication Date: 2018-12-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, all quality enhancement methods in the prior art do not utilize any information of adjacent frames when enhancing the quality of the current frame, so the performance of adjacent frames is largely limited

Method used

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  • Multi-frame quality enhancement method and device for lossy compressed video
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  • Multi-frame quality enhancement method and device for lossy compressed video

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Embodiment Construction

[0037] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0038] The present invention provides a multi-frame quality enhancement method of lossy compressed video, comprising: for the i-th frame of the decompressed video stream, using the m frames associated with the i-th frame to perform quality improvement on the i-th frame Enhanced to play the i-th frame after quality enhancement.

[0039] Specifically, m frames belong to frames in the video stream, and each frame in the m frames is related to the i-th frame F np Respectively have the same or corresponding number of pixels greater than a preset threshold; m is a natural number greater than 1.

[0040] Preferably, in practical applications, for the i-th frame of the lossy compressed video stream, the step of using the m frames associated with the i-th frame to enha...

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Abstract

The present invention provides a multi-frame quality enhancement method and device for lossy compressed video. The method includes: for the i-th frame of the decompressed video stream, using the m frames associated with the i-th frame to perform the i-th frame Quality enhancement, to play the i-th frame after quality enhancement; the m frames belong to frames in the video stream, and each of the m frames has the same or corresponding pixels as the i-th frame The number is greater than the preset threshold; m is a natural number greater than 1. In a specific application, a peak quality frame can be used to enhance a non-non-peak quality frame between two peak quality frames. The above method alleviates the quality fluctuation among multiple frames in the video stream playing process, and at the same time enhances the quality of each frame in the video after lossy compression.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a multi-frame quality enhancement method and device for lossy compressed video. Background technique [0002] Over the past few decades, video has become hugely popular on the Internet. According to Cisco Data Traffic Forecast, in 2016, video traffic accounted for 60% of total Internet traffic, and this figure is expected to reach 78% by 2020. Due to limited Internet bandwidth, video compression must be applied to save encoding bitrate. However, compression artifacts, such as block effects, ringing effects, and blurring, will inevitably occur in the video compression process. These artifacts can cause quality of experience [0003] (QoE) drops severely. Therefore, it is very necessary to study quality enhancement methods for compressed video. [0004] In recent years, methods to improve the visual quality of compressed images or videos have been continuously propose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/154H04N19/159H04N19/172H04N19/48H04N19/51G06K9/62G06N3/04G06V10/764
CPCH04N19/154H04N19/159H04N19/172H04N19/48H04N19/51G06N3/045G06F18/2411G06N3/08G06N20/10H04N19/577H04N9/87G06V20/40G06V10/82G06V10/764H04N19/86G06V20/46G06F18/214
Inventor 徐迈杨韧刘铁李天一方兆吉
Owner BEIHANG UNIV