Memory optimization packet loss concealment in a voice over...

Details Memory optimization packet loss concealment in a voice over... Memory optimization packet loss concealment in a voice over...

2011-04-12

2011-04-12

Sheikh, Ayaz R (Department: 2476)

Multiplex communications

Fault recovery

C714S701000, C714S746000, C714S785000

Reexamination Certificate

active

07924704

ABSTRACT:
A method to reduce memory requirements for a packet loss concealment algorithm in the event of packet loss in a receiver of pulse code modulated voice signals. A voice playout unit in the receiver shares its nominal delay buffer with a history buffer of a packet loss concealment algorithm up to a maximum limit described in a standard. This reduces or eliminates need to allocate memory for the history buffer. A history buffer can also be extended to retain an original portion of voice signal packets received prior to a packet loss as well as generated voice signals as they are generated. A scratch buffer is used as a working buffer and replaces the function of a pitch buffer.

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