Patent ID: 6807526
Filing Date: 2004-10-19
Classification: G10L,H04M

Abstract:
A method of processing at least one coded binary stream organized in the form of frames created from digital audio signals which were coded by at least an audio terminal in order to output processed frames to a subsequent using step, said coding of said digital audio signals including calculating transform coefficients by transforming the digital audio signals from the time domain to the frequency domain, then quantizing and coding said transform coefficients according to a set of quantizers determined by selection parameters extracted from said digital audio signals, said frames including said selection parameters and the thus-coded transform coefficients, the method comprising, for said at least one audio stream received from at least said terminal:(1) obtaining said selection parameters from said frames of said audio stream and determining from said selection parameters the set of quantizers that was used during the quantizing step performed by said audio terminal; (2) recovering the transform coefficients that were calculated by said audio terminal by partially decoding and dequantizing said frames, the recovering being performed by using the set of quantizers determined in step (1); (3) producing processed frames by performing said specific process in the frequency domain on the dequantized transform coefficients obtained in step (2); and (4) supplying said processed frames to a subsequent using step.