Thread: RV9-EHQ
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Old 11th June 2003, 20:50   #45  |  Link
karl_lillevold
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Join Date: Oct 2002
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PSNR calculations can sometimes be very inaccurate. For instance, we have a built-in filter that removes potential capture noise along the edge of the video. Even though the resulting compressed video looks better than the original for those areas, it will significantly degrade a PSNR number, which just looks at pixel for pixel differences. I have no idea how a program like EO video will affect PSNR when it saves RM files as AVI files. By using the proper audience settings it is possible to disable this noisyEdgeFilter though, and there are also some other settings which can be used, but I will leave it as an exercise for the reader to check the producer documentation for these options. Even then there could be problems with rate control and dropped frames. So it is possible to get accurate numbers, but a little complex.
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