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Integrated non-reference video quality appraisement method

A technology of video quality and evaluation method, applied in the direction of television, electrical components, image communication, etc., can solve the problems of no human psychological irrational factors, no consideration of human feeling characteristics, no subjective evaluation research, etc.

Inactive Publication Date: 2009-04-08
HEBEI NORMAL UNIV
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  • Application Information

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Problems solved by technology

[0006] The deficiencies of the above-mentioned patents are as follows: (1) the signal used for its quality evaluation is the signal that has been decoded ( Figure 9 center upper left input signal), no further use of intermediate calculation results during reception and decoding for faster detection
(2) There is no research on the subjective evaluation of the viewer as the evaluation standard, no irrational factors in human psychology are found in it, and no consideration is given to the characteristics of human feelings in the objective evaluation

Method used

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  • Integrated non-reference video quality appraisement method

Examples

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Embodiment 1

[0078] Embodiment 1 (the present invention is used for mobile handheld terminal, see figure 2 ):

[0079] In wireless video services, the handheld device of the receiving terminal can detect the quality of the received content while decoding, and obtain certain thresholds according to pre-statistics and research models. For example, if the packet loss rate is greater than a certain critical value, the handheld device can It shows that the service quality rating is red, so viewers will have more patience and tolerance towards the service. The packet loss rate is only preliminary information obtained from channel service statistics, which can be obtained in a very timely manner from the first independent evaluation module M1, so the evaluation results are basically real-time. From the second independent evaluation module M2, use the maximum delay difference threshold of audio and video signals and the worst PSNR (peak signal-to-noise ratio) evaluation to perform basic quality ...

Embodiment 2

[0080] Embodiment 2 (the present invention is used in IPTV service, see image 3 ):

[0081] In the field of IPTV, terminals have strong computing power and can perform more complex and detailed evaluations. Statistics can be made based on service content and audience groups to obtain quality-deficiency factors with a high degree of importance, which can be used as evaluation modules with relatively high weights in comprehensive evaluations. For example, in the evaluation of news content, the clarity and real-time requirements of text signals and audio signals are high; in sports videos, the clarity of important objects is high, and these requirements can be considered in the model as an independent evaluation module. In this embodiment, in M1, packet loss rate and delay jitter are detected, and IPTV generally requires packet loss rate to be between 10-4 and 10-7, or even smaller, for high-quality video transmission services; The tolerable packet delay is on the order of hund...

Embodiment 3

[0082] Embodiment 3 (the present invention is used in data camera, see Figure 4 ):

[0083] In the codec (CODEC) of a digital camera, the compressed image signal usually also needs to be played back for viewing. The third independent evaluation module M3 is used to detect the peak signal-to-noise ratio, and the poor quality information reflected in the decoding is timely reflected to the shooting By.

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Abstract

The invention relates to a comprehensive non-reference video quality evaluation method. The method uses a quality evaluation module embedded in a decoder for completion. The method has the concrete steps as follows: (1) an input signal of an independent evaluation module is selected from following more than one signal: a. an intermediate result output in each stage of an encoder; b. the input signal of the encoder; c. the output signal of the encoder; (2). each independent evaluation module respectively finishes a respective evaluation result and inputs the respective evaluation result to an overall system adjustment module; (3) the video quality evaluation is finished in the overall system adjustment module. The method has the beneficial effects that the final evaluation can be suitable for different application scenes and service types; the basically accurate evaluation is rapidly obtained and is closer to the subjective feeling of people.

Description

technical field [0001] The invention relates to a comprehensive no-reference video quality evaluation method. Background technique [0002] In the field of video service / video signal transmission, many algorithms and methods have been proposed in the research of objective quality evaluation, including full reference quality evaluation that provides complete original video as a reference comparison; partial reference quality evaluation that provides partial reference content; none at all. No-reference quality assessment of original content information. As the most widely used and most valuable no-reference video quality evaluation, it is the most difficult. The current relatively mature research is limited to the discovery and detection of certain single defects. There are not many comprehensive defect detection literature reports and researches. Foreign patent technologies related to this are: Searched in World Intellectual Property Organization International Bureau The In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
Inventor 吴丽红王志巍王艳君王运格李朝晖张培欣
Owner HEBEI NORMAL UNIV
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