Method and apparatus for a host-based personal computer speakerphone
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 28, 2000
Grant Date -
N/A
app pub date -
Aug 21, 1997
filing date -
Aug 21, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for implementing a speakerphone within a personal computer having a voice-capable modem and an audio board is provided. The personal computer executes host software providing the user interface for speakerphone operation and the indirect interconnection for audio data routing between the voice-capable modem and the audio board without requiring physical jumpering between the modem and audio board. For half duplex speakerphone operation, the host software performs switching between transmit and receive modes by monitoring received audio signal energy levels and switching accordingly. For full duplex operation of the voice-capable modem, the modem's DSP provides echo cancellation of locally generated echoes. Also, for full duplex operation of the audio board, the host software provides echo cancellation for acoustic echoes generated by the speaker audio feeding into the user's microphone.
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