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Topic: MPEG-2 multichannel decoder (Read 5016 times) previous topic - next topic
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MPEG-2 multichannel decoder

Hi,

I am trying to implement the MPEG-2 layer-1/2/3 multichannel decoder, backward compatible with MPEG-1 layer-1/2/3.
I am new to this work and I don’t have any source code to implement this decoder, but I got spec 13818-3.
Actually I am trying to build this multichannel decoder around the MPEG-1 layer-3 and its low sampling frequency (lsf) stereo decoders like MPEG2, MPEG2.5.
Main aim of this decoder is to support normal MP3 stereo decoding as well as multichannel extension.

If there's any other software for multichannel MPEG 2 layer 1/2/3, which is in working status, plz let me know.

I would appreciate any help or suggestions.

Thanks,

Ravichandra

MPEG-2 multichannel decoder

Reply #1 –
Go for the dist11 reference implementation by ISO/IEC, basically being merely a recent cleanup of the well-known dist10 which all initial open-source mp3 encoder efforts were based upon.

Among other stuff, it includes sources for an layer II multichannel encoder/decoder, located in the directory "mc". Have a look at the conformance testing bitstreams as well.

G. W.

MPEG-2 multichannel decoder

Reply #2 –
Quote
Go for the dist11 reference implementation by ISO/IEC, basically being merely a recent cleanup of the well-known dist10 which all initial open-source mp3 encoder efforts were based upon.

Among other stuff, it includes sources for an layer II multichannel encoder/decoder, located in the directory "mc". Have a look at the conformance testing bitstreams as well.

G. W.
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Thanks for your information, it will help me alot.

I have few doubts related to MPEG-2 layer-3 multichannel decoder.
Can I get inforamtion/reference s/w for MPEG-2 layer-3 multichannel decoder?
Even i didn't find any test vectors in the ISO standards website.
Because I found the MPEG multichannel related stuff for layer-2 in dist10 & dist11 folders from the ISO website.

It seems, MPEG-2 layer-3 multichannel decoder is not available for public or it is not implemented?

Any suggestions regarding MPEG-2 layer-3 multichannel decoder.........reference s/w as well as test vectors.......

Thanks
Ravichandra Reddy

MPEG-2 multichannel decoder

Reply #3 –
Quote
Can I get inforamtion/reference s/w for MPEG-2 layer-3 multichannel decoder?

No .

Quote
Even i didn't find any test vectors in the ISO standards website.

One conformance bitstream is actually availabe, but is has been hand-made! Just have a look a the audectst.doc file, the relevant bitstream is located in archive test23.tar.gz.

Quote
It seems, MPEG-2 layer-3 multichannel decoder is not available for public or it is not implemented?

The latter, no layer III implementation has ever been made (and furthermore become totally unrealistic to be in the future).

G. W.