×

Enhancing the intelligibility of received speech in a noisy environment

  • US 7,630,887 B2
  • Filed: 08/02/2006
  • Issued: 12/08/2009
  • Est. Priority Date: 05/30/2000
  • Status: Expired due to Fees
First Claim
Patent Images

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.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×