A method for testing video frame rate of video coding-decoding system

A technology for video encoding and decoding and video frame rate, which is used in the field of testing the video frame rate of video encoding and decoding systems, and can solve problems such as inapplicability

Inactive Publication Date: 2005-06-01
WUHAN UNIV
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  • Claims
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Problems solved by technology

[0004] Although the objective test method based on internal identification can calculate the video frame rate more accurately, it requires the tester to have the authority to operate the internal program of the video codec system under test, that is to say, the system under test must be a white box system
However, this condition is difficult to meet in many cases. For example, when testing the video codec system of digital video equipment, the system under test is actually a black box system, and its internal program is kept secret.
At this time, the objective test method based on internal identification cannot be applied

Method used

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  • A method for testing video frame rate of video coding-decoding system
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  • A method for testing video frame rate of video coding-decoding system

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Embodiment Construction

[0019] Such as figure 1 As shown in the embodiment of the test method of the present invention, the device to be tested is a test digital video recording device with a video codec system, and the test item is to test the video frame rate output by the device to be tested. The method steps are:

[0020] (1) By a computer, the known file size is 8M, the video sequence file of video frame rate 30 frames per second, through the video input interface of the digital video recording device to be tested, input the video codec of the digital video recording device to be tested system; the format of the known video sequence file is the YUV format (the international standard for video compression encoding formulated by the International Standardization Institute ISO and the International Telecommunications Association ITU all stipulates to use the YUV format as a unified format for processing data, wherein Y represents the brightness signal, U, V represents the color difference signal); ...

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Abstract

The method of measuring video frame rate of video coding/decoding system includes the following steps: inputting the video sequence file with known size and video frame rate to the digital video coding/decoding system to be measured; outputting the video sequence file through processing in the digital video coding/decoding system and saving in one memory; calculating the video frame rate of the digital video coding/decoding system in formula F2=F1X(A2XA1), where, F2 is the video frame rate of the digital video coding/decoding system to be measured, F1 is the video frame rate of the known video sequence file, A1 is the size of the known video sequence file, and A2 is the size of video sequence file in the memory. The method of the present invention can measure video frame rate of video coding/decoding system without needing the tester's authority of operating the inner program inside video coding/decoding system, and is suitable for both white box system and black box system.

Description

technical field [0001] The invention relates to the technical field of multimedia information processing, in particular to a method for testing the video frame rate of a video codec system. Background technique [0002] In a video codec system, the number of frames processed per second is the frame rate, and the video frame rate depends on the image processing speed of the codec system. In the PC-based video codec system, the image processing speed depends on the processing speed of the CPU, the transmission speed of the bus, the access speed of the hard disk and the memory capacity. When the image processing speed is too low, the encoding and decoding system will adopt a frame skipping strategy, that is, skip some frames (reduce the frame rate) and not perform encoding and decoding, so that the number of image processing frames per second is equal to the image processing speed of the system. match. But when the frame rate is too low, it will affect the real-time performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
Inventor 胡瑞敏韩镇刘琼
Owner WUHAN UNIV
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