Pitch Filter for Audio Signals and Method for Filtering an Audio Signal with a Pitch Filter

In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an 5 operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio decoder having a coding mode selected from one of at least two distinct coding modes, and the pitch 10 filter is capable of being selectively operated in either the active mode or the inactive mode based on control information while the audio decoder is operating in the coding mode. A method for filtering a preliminary audio signal with a pitch filter substantially as described above is also disclosed.