Re: [mpeg2-dev] How to reduce Intra block DC bits prior to IDCT

2011-08-03 Thread Keith Winstein
Hi pebble, I'm not sure exactly where you're getting the [0, 32768] (the DC component can be negative), but I think you may probably barking up the wrong tree. IEEE 1180 only defines the IDCT statistically, so different MPEG-2 decoders can produce slightly different output. libmpeg2 may even produ

[mpeg2-dev] How to reduce Intra block DC bits prior to IDCT

2011-08-03 Thread pebble
Hi there, I need to hook into libmpeg2 so that I may do some processing on mpeg2 bitstream level. I have a working algorithm developed with the reference decoder (mssg's mpeg2v12.zip), but I would like to try on libmpeg2 because of its very fast decoding speed. To decode the same mpeg2 video