Patent ID: 7630887
Filing Date: 2009-12-08
Classification: G10L,H03G

Abstract:
1. A method comprising: computing at a local device a short term signal level for a frame of an audio signal, wherein the audio signal is transmitted from a remote device and received by the local device; computing at the local device a long term signal level based on the short term signal level for the frame and multiple previous short term signal levels computed for multiple previous frames of the audio signal; computing at the local device an automatic gain control (AGC) gain for the frame based on the long term signal level; computing at the local device a dynamic range compression (DRC) gain; computing at the local device a noise factor indicative of a level of ambient noise at the local device; and adjusting at the local device an amplitude of the audio signal based on the AGC gain, the DRC gain, and the noise factor.