DATA MUTING METHOD AND APPARATUS FOR COMMUNICATION SYSTEMS

摘要

Briefly, according to the invention, a receiver (700) having an audio output device (720) is disclosed. The receiver receives a carrier signal modulated with an information signal. A demodulator (722) included in the receiver (700) demodulates the received carrier signal and routes the demodulated information signal (302) to a delay circuit (310). The output of the demodulator (722) is also coupled to a decoder (318) where a data portion (404) of the demodulated information signal (302) is decoded to determine the exact start time of a voice portion (406) of the demodulated information signal (302). A coupler means couples the signal (302) to the audio output device (720) substantially simultaneously with the start of the voice portion (406) with no delay. As a result the received voice portion (406) is available on the audio output device (720) without the delay required to determine the nature of the signal (302). In other aspects of this invention a detector means (318) detects the presence of a voice portion of the information signal with no preceding data. In response to this detection the coupler (312) couples the output of the delay circuit (310) to the audio output device (720).