Method and apparatus for decoding of digital audio data coded in layer 1 or 2 of MPEG format

摘要

The invention relates to a method and an apparatus for decoding of digital audio data coded in layer 1 or 2 of MPEG format. Processing of the inverse quantization of the quantizised samples and processing of the rescaling of the inverse quantizised samples is taking place contemporaneous to the windowing of the data transformed into the range of time and not contemporaneous thereto the transformation of the data from the range of frequency into the range of time using a matrix operation is taking place. The apparatus having two fixed wired control units 2 and 3, said first control unit (2) used for frame synchronization of a data stream, header decoding, reading of page informations, inverse quantization of quantizised subband samples and rescaling of said inverse quantizised samples and said second control unit (3) used for transformation of said rescaled sample data from the range of frequency into the range of time using a matrix operation and for windowing of the data transformed into the range of time. <IMAGE>