Gabriel, let me add few points,
pls-
MPEG2 Layer 1 do differ from
MPEG1 only in its multichannel feature; audio encoding for a channels are same
for MPEG1 and MPEG2.
ISO recommends to use psycho
model 1 for both layer 1 & 2.
So if you have algorithm for L2
multichannel encoder, you need to only add L1 quantization to make L1
multichannel. Of course, bitstream packing and scale factor encoding are
different, but it is very simple and stright forward when comapred to L2.
Regarding Layer 3, this
uses entirely different audio representation. You may have to read little more
on this :).
- Mohammed
-----Original Message-----
From: Chetan Krishnamurthy [mailto:[EMAIL PROTECTED]
Sent: Wednesday, February 26, 2003 9:56 AM
To: [EMAIL PROTECTED]
Subject: [MP3 ENCODER] Need help for layer-1
From: Chetan Krishnamurthy [mailto:[EMAIL PROTECTED]
Sent: Wednesday, February 26, 2003 9:56 AM
To: [EMAIL PROTECTED]
Subject: [MP3 ENCODER] Need help for layer-1
Hi gabriel,
For Layer-2, I have the TooLame reference code.
But I need help for Layer-1 part.
Specifically Mpeg2-layer1 part, since the ISO code doesn't seems tobe working for MPEG2-Layer1.
Also I need some help for the FilterBank portion of Layer3.In Layer3, There is an Overlap Between
Windowing, FilterBank and MDCT. How can I make use of this part for Layer2, since only windowing and filterBank is required for Layer2.
Bye With Rgds
Chetan K.
