METHOD AND APPARATUS FOR DECODING SUBBAND CONFIGURATION DATA FOR SUBBAND GROUPS OF A CODED AUDIO SIGNAL

摘要

For an efficient encoding of subband configuration data the first, penultimate and last subband groups are treated differently than the other subband groups. Further, subband group bandwidth difference values are used in the encoding. The number of subband groups N SB is coded using a fixed number of bits representing N SB - 1. The bandwidth value B SB [1] of the first subband group is coded using a unary code representing B SB [1] - 1. No bandwidth value B SB [ g ] is coded for the last subband g = N SB . For subband groups g = 2, ..., N SB - 2 bandwidth difference values ” B SB [ g ] = B SB [ g ] - B SB [ g - 1] are coded using a unary code, and the bandwidth difference value ” B SB [ N SB - 1] for subband group g = N SB - 1 is coded using a fixed number of bits.