US05142656Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio
AssigneeDolby Laboratories Licensing Corporation
Assign./FiledAug. 25, 1992/ Nov. 4, 1991
InventorsFielder; Louis D., Davidson; Grant A.
SummaryFancy adaptive bit allocation method using fixed offsets (seems a lot like the one ATRAC uses). Appears to be large overlap with US05109417.
AbstractA transform encoder, a transform decoder, and a transform encoder/decoder system employ adaptive bit allocation wherein each code word representing spectral information is allocated a fixed number of bits and an adaptive number of bits, except that at least some but not all code words are allocated a fixed number of bits.