Method for enabling spectral band replication in e.g. digital audio broadcast, involves determining spectral band replication period and source frequency segment, and performing spectral band replication on null bit code sub bands at period

摘要

The method involves determining a spectral band replication period (102) and a source frequency segment, where the period is a bandwidth from a zero-frequency point to a frequency point of a sound position, and the segment is a frequency segment of a frequency point of the zero-frequency point, which backwardly shifts a copyband-offset-frequency point, up to a frequency point of the position, which backwardly shifts a copyband-offset-frequency point, and displacement of offset is larger or equal to zero. Spectral band replication is performed (103) on null bit code sub bands at the period. Independent claims are also included for the following: (1) a device for enabling spectral band replication (2) a method for enabling audio coding (3) an audio decoding system.