Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2005-03-08
2005-03-08
Cangialosi, Salvatore (Department: 3621)
Multiplex communications
Duplex
Transmit/receive interaction control
C370S486000
Reexamination Certificate
active
06865162
ABSTRACT:
A method and apparatus for elimination of clipping associated with VAD-directed silence suppression includes receiving a voice signal in a buffer during the delay between the start of voice activity and the detection of the voice activity. Then, the voice signal is played from the buffer in condensed form, e.g., by dropping packets or slightly accelerating playback of the signal from the buffer. After voice activity is detected, the voice signal may continue to be buffered and condensed until the buffer is completely depleted. The voice signal may then be transmitted directly, without being buffered or condensed.
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“Packet Telephony: Long Distance Service for ISP's” pp1-16, (1999) Cisco Systems , Inc.
Blakely , Sokoloff, Taylor & Zafman LLP
Cangialosi Salvatore
Cisco Technology Inc.
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