Patent ID: 6437895
Filing Date: 2002-08-20
Classification: H04N

Abstract:
A communications system including forward and reverse paths for providing signals, the communications system comprising:an optical transmitter for receiving an analog information signal and transmitting in accordance therewith a compressed digital optical signal, the optical transmitter comprising: an analog-to-digital (A/D) converter for converting the analog information signal to a digital information signal; a compression circuit coupled to the A/D converter for generating a compressed digital information signal, wherein the compression circuit comprises: first and second mixers for alternatively mixing the digital information signal to generate first and second signals at, respectively, first and second frequencies; a low pass filter for filtering the first and second signals; an interpolator coupled to the lowpass filter to generate an increased number of signal samples of the first and second signals; and a decimator coupled between the interpolator and the serializer for generating a decreased number of signal samples of the first and second signals; a serializer for converting the compressed digital information signal to a serial signal; and a laser diode driven by the serializer to generate the compressed digital optical signal, wherein the compressed digital optical signal results in transmission of the signal at a lower data rate.