Property ALSpeexCompressor.TALSpeexCompressor.VoiceActivityDetection

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Class: TALSpeexCompressor

Syntax

Delphi:

property VoiceActivityDetection : Boolean read FVoiceActivityDetection write FVoiceActivityDetection;

C++ Builder:

__property bool VoiceActivityDetection = { read=FVoiceActivityDetection, write=FVoiceActivityDetection };

Summary

Enables/Disables the voice activity detection.

Description

Use this property to enables or disables the voice activity detection.

When enabled, voice activity detection detects whether the audio being encoded is speech or silence/background noise. VAD is always implicitly activated when encoding in VBR, so the option is only useful in non-VBR operation. In this case, Speex detects non-speech periods and encode them with just enough bits to reproduce the background noise. This is called “comfort noise generation” (CNG).

Delphi example:

ALSpeexCompressor1.VoiceActivityDetection := True;

C++ Builder example:

ALSpeexCompressor1->VoiceActivityDetection = true;

Visual C++(MFC/Win32) example:

ALSpeexCompressor1.VoiceActivityDetection = true;

C# Example:

speexCompressor1.VoiceActivityDetection = true;