Television – Monitoring – testing – or measuring – Test signal generator
Reexamination Certificate
2008-06-24
2008-06-24
Natnael, Paulos M. (Department: 2622)
Television
Monitoring, testing, or measuring
Test signal generator
Reexamination Certificate
active
07391434
ABSTRACT:
The present invention is a method for MPEG compliance testing that designs test bit streams such that every frame of the expected decoded video is known. The test bit stream is generated, decoded and stored as an expected output decoded video. The test bit stream is fed to the device under test where it is decoded. Actual output video is compared with the expected decoded video on a frame-by-frame basis. The test results are indicated by discrepancies, which can be visually examined by human or by computer, through a comparison of the two videos. During generation of the test bit stream, for a given GOP structure, the subsequent P and B frames are determined by varying the selected testing MPEG parameter with the whole range of its possible values, while keeping other parameters constant.
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Natnael Paulos M.
The DIRECTV Group Inc.
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