A simulcast broadcast uses digital signal processing techniques to scale pulse coded modulation samples of a signal for broadcast. Samples are adjusted to fully utilize all quantization levels representable by an 8-bit word. Time delay is adjustable using digital techniques by writing and reading data into and out of a RAM. Signal amplitude is adjustable by multiplying samples by a numeric factor. A computer can be used to adjust processing, delay and amplification of the digital signal processor.
申请公布号
US5060240(A)
申请公布日期
1991.10.22
申请号
US19890310797
申请日期
1989.02.14
申请人
MOTOROLA, INC.
发明人
ERICKSON, PAUL M.;MATZ, JOHN E.;GROCH, TIM J.;STEDMAN, ROBERT B.;SHAUGHNESSY, MARK L.;KANDAH, TAISIR Y.