Patent ID: 7076107

Claim:
A subband forming apparatus, comprising: a plurality of memory locations with each memory location being configured to store at least a regional signal corresponding to a divided portion of an input signal; and a plurality of analytic filter banks configured to perform a parallel subband analysis relative to the regional signals stored in the plurality of memory locations, with each analytic filter bank being coupled in a one-to-one relationship with each memory location and a particular regional signal stored therein and configured to receive the particular regional signal and then to divide each received particular regional signal into a plurality of subbands, wherein each of said plurality of memory locations also stores at least one signal in addition to the stored regional signal, said at least one signal including a copy of at least one of a leading portion and trailing portion of another regional signal stored in another memory location corresponding to a divided portion of the input signal originally bordering the divided portion of the input signal corresponding to the particular regional signal.