Method and device for pitch enhancement of decoded speech

摘要

Methods and apparatus for post-processing a decoded sound signal in order to enhance the perceived quality of the signal are disclosed. The decoded signal is divided into a number of frequency sub-band signals and post-processing is applied to at least one, but not all, of the sub-band signals. The sub-bands may then be added to produce an output signal that has had post-processing localised to a desired sub-band or sub-bands, with the remaining sub-bands remaining unaltered.