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Method for evaluating quality of streaming video based on video characteristics

A technology for video feature and quality assessment, applied in the field of video user experience quality, can solve the problems of video quality assessment, costing a lot of manpower and material resources, poor real-time performance, etc., and achieve the effect of high feasibility and high accuracy

Inactive Publication Date: 2009-06-03
EAST CHINA NORMAL UNIVERSITY
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Problems solved by technology

The former relies on the subjective experience of the perceiver to evaluate the quality of the object, but the real-time performance is not good, and it takes a lot of manpower and material resources, and usually cannot be directly used for video quality evaluation in streaming media services; the latter measures the quality of video based on the quantitative indicators given by the model. Image quality, but the evaluated video quality is quite different from people's subjective perception of the video

Method used

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  • Method for evaluating quality of streaming video based on video characteristics
  • Method for evaluating quality of streaming video based on video characteristics

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Embodiment

[0028] The present invention needs to artificially drop the original MPEG-TS file in a simulated environment to simulate network damage, then save and analyze the packet loss data and the MPEG-TS file after the packet loss, and obtain the damage caused by the lost data. The mapping relationship between the picture features of the damaged frame and the visual effect damage, the specific operation steps:

[0029] Step 1: Enter the packet loss rate (%),

[0030] Step 2: According to the packet loss rate in step 1, use the packet sending software to randomly drop packets.

[0031] Step 3: Save the lost packet data.

[0032] Step 4: Save the video after packet loss as a separate video.

[0033] Step 5: Scan the image header of the frame where the packet loss is located, and obtain the damaged frame sequence through the frame header information and the additional information of the slice layer and the macroblock layer.

[0034] Step 6: Extract features such as DCT coefficients an...

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Abstract

The invention discloses a method for evaluating quality of streaming video based on video characteristics. The method is realized in a simulation environment of simulating network loss on MPEG-TS stream; network damage is simulated through man-made loss, simultaneously loss data is recorded, image characteristics of a damaged frame are analyzed, and impact of video damage to visual effect is observed by eye, thereby establishing a one-to-one correspondence. In practical application, a QoE evaluation value which is in accord with subjective feeling of a user can be acquired through sampling and analyzing a transmission media and analyzing the network damage. In the method an objective evaluation method and a subjective evaluation method are combined to ensure the evaluation value is closer to the real feeling of the user; evaluation is carried out through analyzing compressed domain data of video streaming in a streaming media service in real time, and feasibility of real-time analysis is higher.

Description

technical field [0001] The invention relates to the technical field of quality of experience (QoE) of video users, in particular to a method for evaluating the quality of streaming video based on video features. Background technique [0002] The rapid development of packet network technology represented by the Internet Protocol (IP) makes the packet network have the advantages of high bandwidth, convenient access, and low cost. The applications it provides are not simply limited to web browsing, email, and search engines. and other information tool applications, but extended to streaming media services such as IPTV. At the same time, streaming video services have high bandwidth, high real-time requirements, and are very sensitive to network impairments such as packet loss, disorder, transmission delay, and delay jitter. However, the traditional IP protocol as the core protocol of the packet network has only one service type, that is, the best effort service model, which doe...

Claims

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Application Information

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IPC IPC(8): H04N17/00
Inventor 贺樑顾君忠邱萌薛静马天龙杨燕林欣许文涛常潘陆涛
Owner EAST CHINA NORMAL UNIVERSITY
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