Patent ID: 7206417

Claim:
A digital transmission system for playing music through audio speakers which uses AC power lines as an audio network, comprising: a digital compression device for compressing digital music data into a compressed digital music data; a digital transmission device including a series conversion circuit for converting the compressed digital music data into series compressed digital signal packets; a digital modulator which controls a transmitter for transmitting the series compressed digital signal packets onto the AC power lines using one carrier frequency; and a digital receiver device connected to the AC power lines for receiving the transmitted packets over the AC power lines, wherein the digital receiving device includes: a digital demodulator for demodulating the series compressed digital signal packets modulated on one carrier frequency; a serial/parallel digital converter for converting the demodulated series compressed digital signals into demodulated parallel compressed digital signals; a digital decompressor for decompressing the demodulated parallel compressed signals into demodulated parallel decompressed digital signals; a digital/analog converter for converting the demodulated parallel decompressed digital signals into analog signals; and a loudspeaker for receiving the analog signals and generating music corresponding thereto; wherein the series conversion circuit is operable to encode a destination address into the series compressed digital signal packets, and further wherein the digital receiving device is operable to compare the destination address to an address of the receiving device in order to determine if the signal is addressed to the receiving device.