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Old 19th October 2010, 15:30   #1  |  Link
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jpeg 2000 error concealment

Hi everybody,

I'm working on a project on which I will investigate different error concealment methods in jpeg2000. I started this thread so I could ask different questions regarding my project.

I'm using jj2000 as the coder, and my system is like this. jpeg2000 frames are put into rtp/udp/ip/ethernet-packets. I randomly drop packets according to a packet error rate, and I wil compare ways of concealing the errors.

naturally I have tons of questions, that I would use this thread to get and answer to, OK?


I have an image with 8 quality layers. This image will go over 2774 ethernet packets, and with a packet error rate of 0.001, I loose for example 3 frames. The result is that some of the codeblocks are distorted. HOWEVER, when I remove the 8th quality layer. The distortion goes away... everytime! The packet loss is totally random. I also experienced once that I hade to remove the 7th layer as well before the distortion goes away.

I can't understand why it allways goes away with removal og tha last layer, when the packet loss is random.

Here's an image, you should use irfanview. KDU_SHOW(kakadu) will not open as some headers seems to be lost as well.
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Old 24th October 2010, 22:24   #2  |  Link
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Perhaps JPEG2000 is not a well-used format in here. Anyway,

I'm going to use some yuv10 files from VQEG to encode using jj2000 or kakadu. However, I have no idea what to do with these files. There is no program that will open them, and there is nothing I find googling that can help me. I need some lossless fileformat for the encoder, YUV10 won't do.

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