5.1.3 Voice-Activated or Constant Recording

The ECCH_VADINITIATED parameter in ec_setparm( ) controls whether speech utterance data is transmitted only after the VAD detects speech energy or at all times.

To implement constant recording or streaming, turn this parameter OFF. To implement voice-activated recording or streaming, turn this parameter ON. Speech is transmitted using the ec_reciottdata( ) or ec_stream( ) functions.

The default value is speech utterance data is transmitted only after the VAD detects energy. This setting is particularly useful for reducing CPU loading by only streaming data when audio energy is present.

For more information on using ECCH_VADINITIATED, see Section5.1.4, Sample VAD Scenarios.

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