H - Electricity – 04 – B
Patent
H - Electricity
04
B
354/69
H04B 14/06 (2006.01) H03G 5/16 (2006.01) H03G 9/02 (2006.01) H03M 3/02 (2006.01) H04B 1/62 (2006.01)
Patent
CA 1257930
ABSTRACT An encoder converts an analog input signal to a digital signal. The encoder comprises means for generating a control signal with a predetermined bandwidth from the input analog signal. The control signal indicates the desired optimum step-size to be applied in the encoder. The encoder further comprises a converter for converting the analog input signal to a digital signal. The converter is responsive to the control signal representing step-size so that the digital signal will be generated in accordance with the step-size information. Since the generation of a limited bandwidth control signal requires time, the encoder also includes means for introducing time delay to the analog input signal, so that the delayed input signal reaches the converter when the control signal is available for digital encoding. A decoder generates an analog output signal from a digital signal received from an encoder through a transmission medium. The digital signal received includes a digital representation of an analog input signal to the encoder and step-size information which was used to digitally encode the analog signal in the encoder. The decoder comprises a converter responsive to a second control signal of limited bandwidth derived from the step-size information for generating from the digital representation an analog output signal. The analog output signal so generated is similar to the input analog signal.
464818
Gundry Kenneth J.
Todd Craig C.
Dolby Laboratories Licensing Corporation
Fetherstonhaugh & Co.
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