| 摘要 |
<p>In a digital carrier-concentration system, utilizing time slot assignment, comprises a delta modulator operable to convert analog signals into a digital binary bit stream, the modulator being responsive to the bit stream to decode a coincident pulse whenever a predetermined number of "ones" or "zeros" occur in the bit stream, a voice detect circuit responsive to the coincident pulse to provide a voice detect output, and control means to assign the stream a time slot in a high bit rate data channel in response to detection of said voice detect output, after a predetermined interval.</p> |
