Apparatus for calculating gain adjustment values ​​for adjusting the gain of a plurality of subband signals in filter banks actual value and corresponding method.

摘要

Apparatus for calculating values ​​of gain adjustment for adjusting the gain of a plurality of signals generated subband filtering a signal using a filter bank analysis, taking the filter bank, subband filter having filters adjacent subband filter bank transition bands overlapping in an overlapping range, comprising: means (82) for examining a subband signal originating from a subband filter and an adjacent subband signal originating from a subband filter adjacent to determine whether the subband signal and the adjacent subband signal components have aliasing generating signal in the overlapping range to obtain grouped subband signals in response to a positive test resu means (84) for calculating a first value of gain setting and a second value of gain adjustment for adjacent subband signals grouped so that adjacent subband signals grouped not have independent gain values, wherein the means calculating is operative to determine an indication of a reference energy for the subband signals grouped and an energy estimate for an energy in the adjacent subband signals grouped, and to calculate the values ​​of gain adjustment for the subband signals grouped based on the indication of the reference energy and the energy estimate, wherein the means (84) for calculating is connected to means for outputting, for transmittal to a decoder, the first value of gain adjustment and the second gain adjustment value or is connected to means for adjusting the gain of the adjacent subband signals using the pr imer gain adjustment value and the second gain adjustment value.