1988 · 13 citations · 0 references
Social SciencesCommunicationDigital CommunicationMobile ComputingPsychoacousticsDigital Signal ProcessingMobile CommunicationSpeech AcousticsSpeech Perception In NoiseSpeech RecognitionBackground NoiseBackground Noise EffectsMobile Communication TechnologiesSpeech Activity DetectionSpeech Signal ProcessingTelephone SystemsTelephony SystemsVoice Communication Systems
The use of discontinuous transmission (DTX) in digital cellular radio is discussed, and the role of the voice activity detector (VAD) in a DTX system is considered. A block diagram of the VAD is given, and its function of distinguishing between speech superimposed on background noise and noise without speech present is described.