atrac3p:start
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Table of Contents
ATRAC3+ format documentation
intro
ATRAC3+ is a hybrid subband codec like MP3. The signal is split into 16 bands, that are mostly encoded in the frequency domain. Some of the low frequency bands are split themself into smaller parts, customarily called bandlets, to a total of 32 bandlets. The purpose of the bandlets is that each bandlet has its own quantizer. ATRAC3+ can have more than 2 channels - in that case more than one substream is present. This case is not described here.
Parsing
- First bit must be zero
- Array of blocks follows, each block:
- two bits type followed by data
- type 0 = single channel substream data
- type 1 = dual channel (stereo) substream data
- type 2 = non-audio data (ignored)
- type 3 = end of data marker
Synthesis
atrac3p/start.1258242815.txt.gz · Last modified: 2009/11/14 23:53 by megadiscman