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1. (WO2001035588) ANALOGUE TO DIGITAL AND DIGITAL TO ANALOGUE CONVERSION FOR BROADBAND TRANSMISSION

Pub. No.:    WO/2001/035588    International Application No.:    PCT/US2000/029399
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Thu Oct 26 01:59:59 CEST 2000
IPC: H04L 12/28
Applicants: SCIENTIFIC-ATLANTA, INC.
Inventors: FARHAN, Forrest M.
QUESENBERRY, Paul E.
Title: ANALOGUE TO DIGITAL AND DIGITAL TO ANALOGUE CONVERSION FOR BROADBAND TRANSMISSION
Abstract:
A broadband communication system (60), such as a cable television system, includes a forward path for transmitting information from headend equipment to subscribers and a reverse path for transmitting information from the subscribers to the headend equipment. The reverse path includes a transmitting station (65) that receives a first analog signal, converts the first analog signal to a first digital signal having a first number of bits, encodes the first digital signal to generate a second digital signal having a second number of bits less than the first number of bits, then optically transmits the second digital signal. A receiving station (70), also located in the reverse path, receives the second digital signal, decodes the second digital signal to generate a third digital signal having a third number of bits greater than the second number of bits, then converts the third digital signal to a second analog signal that approximates the first analog signal.