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Method and device for estimating video quality on bitstream level

一种视频质量、估计比特的技术，应用在估计比特流级别的视频质量及设备领域

Inactive Publication Date: 2014-01-29
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is well known that MSE is not a good metric for subjective video quality, especially for measuring quality degradation caused by transmission impairments

Method used

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  • Method and device for estimating video quality on bitstream level
  • Method and device for estimating video quality on bitstream level
  • Method and device for estimating video quality on bitstream level

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Embodiment Construction

[0034] Video communication (eg, IPTV services) over wired and wireless IP networks has become very popular. Video transmission over IP networks is less reliable than traditional video transmission over cable networks. The situation is even worse in a wireless network environment. Accordingly, video quality modeling (VQM) is desired to evaluate quality degradation caused by IP transport impairments (eg, packet loss, delay, jitter) in addition to those caused by video compression. Such as figure 1 As shown, there are two categories of visible artifacts caused by transmission and video encoding respectively: transmission impairment / network impairment 50 and encoding artifact 60 .

[0035]One challenge specific to perceptual artifacts of VQM measurements caused by network impairments, compared only to VQM measurement coding artifacts, is evaluating the artifacts after applying error concealment at the decoder. When some parts of the encoded video bitstream are lost during netwo...

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Abstract

A method for estimating video quality on bit-stream level, wherein the video quality refers to a video after error concealment and the method is performed on bit-stream level before said error concealment, comprises extracting and / or calculating a plurality of global condition features from a video bit-stream, extracting and / or calculating a plurality of local effectiveness features at least for a lost MB, calculating a numeric error concealment effectiveness level for each (or at least for each lost) MB by emulating an error concealment method that is used in said error concealment, and providing the calculated error concealment effectiveness level as an estimated visible artifacts level of video quality.

Description

technical field [0001] The present invention relates to a method and a device for estimating perceived video quality, especially at the bitstream level before video decoding. Background technique [0002] This section is intended to introduce the reader to various aspects of technology, which may be related to aspects of the present invention that are described and / or claimed below. It is believed that this discussion is helpful in providing the reader with background information to better understand the various aspects of the invention. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art. [0003] Video delivery over IP networks is unreliable. The need for VQM (Video Quality Modeling) is to evaluate quality degradation due to IP transport impairments (eg packet loss, delay, jitter) in addition to those caused by video compression. Artifacts are evaluated after applying error concealment (EC) at the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/68H04N19/895
CPCH04N19/00684H04N19/00939H04N19/0003H04N19/002H04N19/107H04N19/154H04N19/895H04N19/513
Inventor 廖宁顾晓东陈志波谢凯
Owner THOMSON LICENSING SA