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Discussion Groups | Image Signal Processing | Error recovery and concealment
Technical Discussions related to Image Processing (image coding, compression, digital effects, mpeg, etc)
Error recovery and concealment - Arvind Raman - Sep 28 15:52:00 2001
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Hi there, Well I guess the dsp group has been idle for quite some time, so I thought I would post a nice little question to u guys so as to keep this group alive. Well offlate I have been working on error recovery and concealment on an MPEG - 4 coded video bitstream. I started off with a 10 ^ (-5) bit error rate (BER) and slowly graduated to 10 ^ (-4) BER. The error concealment results I obtained were pretty good and satisfactory. But when I tried moving towards decoding a stream affected by 10 ^ (-3) BER my results were really poor. I would like to know, if its possible to effectively conceal the errors in a bitstream affected by a 10 ^ (-3) BER. I have gone through nearly a hundred paper on the net, but most of them seem to talk about 5% ATM cell loss. Could someone alse explain what this 5% ATM cell loss means and whether there is a formula to convert this figure in terms of BER. The way I calculate my BER is as follows. After every 10 ^ (-3) bits I randomly select a byte and change it. I would appreciate any help / guidance in this regard Thanks a lot Arvind Raman __________________________________________________ |
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