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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, can solve problems such as performance limitations of adjacent frames

Active Publication Date: 2018-07-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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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 invention provides a multi-frame quality enhancement method and device for a lossy compressed video, and the method comprises the steps: employing m frames correlated with an i-th frame for the quality enhancement of the i-the frame of a decomposed video stream, so as to play the i-the frame after quality enhancement, wherein the m frames belong to the video stream, and each of the m frames and the i-th frame respectively have the same pixels, or the corresponding numbers of pixels are greater than a preset threshold value, and m is a natural number greater than one. In a specific application, the method can employ a peak quality frame for enhancing a non-peak quality frame between two peak quality frames. The above method alleviates the quality fluctuation between a plurality of frames in a play process of the video stream, and enables the quality of all frames in the video after the lossy compression to be improved.

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 Applications(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
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