Methods and apparatus for the measurement of video quality
First Claim
1. A method for the measurement of video quality, comprising the steps of:
- receiving a video signal at a decoder, said video signal containing a test signal;
decoding said video signal;
temporarily storing at least the test signal portion of the video signal in memory;
analyzing the test signal at a processor associated with the decoder; and
calculating a quality parameter for the received video signal based on the test signal at the processor.
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Accused Products
Abstract
The present invention relates to methods and apparatus for measuring the quality of video (e.g., television) signals. In particular, the methods and apparatus of the present invention allow for the measurement of various quality parameters of analog or digital video signals at a set-top terminal 10 or similar device, without the need for external test equipment. A video signal 14, which contains a test signal, is received at a decoder 20. The video signal 14 is decoded and temporarily stored in memory 40. A processor 30 associated with the decoder 20 and the memory 40 analyzes the test signal and calculates a quality parameter for the received video signal 14 based on the test signal. The quality measurements can also be accessed remotely and downloaded, for example, by a cable television provider at a cable television headend. The video quality measurement may include various indicators of end-to-end system performance, including the performance of the set-top terminal 10 or similar device.
25 Citations
20 Claims
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1. A method for the measurement of video quality, comprising the steps of:
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receiving a video signal at a decoder, said video signal containing a test signal;
decoding said video signal;
temporarily storing at least the test signal portion of the video signal in memory;
analyzing the test signal at a processor associated with the decoder; and
calculating a quality parameter for the received video signal based on the test signal at the processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for providing a measurement of video quality, comprising:
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a decoder for decoding a received video signal containing a test signal;
memory for temporarily storing at least the test signal portion of the decoded video signal; and
a processor associated with the memory for;
analyzing the test signal, and calculating a quality parameter for the received video signal based on the test signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification