WO2001082618A3 - Two way cable system with noise-free return path - Google Patents

Two way cable system with noise-free return path Download PDF

Info

Publication number
WO2001082618A3
WO2001082618A3 PCT/CA2001/000556 CA0100556W WO0182618A3 WO 2001082618 A3 WO2001082618 A3 WO 2001082618A3 CA 0100556 W CA0100556 W CA 0100556W WO 0182618 A3 WO0182618 A3 WO 0182618A3
Authority
WO
WIPO (PCT)
Prior art keywords
return path
feeder line
cable system
signal
top boxes
Prior art date
Application number
PCT/CA2001/000556
Other languages
French (fr)
Other versions
WO2001082618A9 (en
WO2001082618A2 (en
Inventor
Abdul-Karim Lakhani
Original Assignee
Advanced Interactive Inc
Lakhani Abdul Karim
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Advanced Interactive Inc, Lakhani Abdul Karim filed Critical Advanced Interactive Inc
Priority to NZ522452A priority Critical patent/NZ522452A/en
Priority to CA002407321A priority patent/CA2407321A1/en
Priority to AU2001252082A priority patent/AU2001252082A1/en
Priority to EP01925260A priority patent/EP1287693A2/en
Publication of WO2001082618A2 publication Critical patent/WO2001082618A2/en
Publication of WO2001082618A9 publication Critical patent/WO2001082618A9/en
Publication of WO2001082618A3 publication Critical patent/WO2001082618A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The return path for a signal in a cable system uses a portion of the 50-750 MHz frequency band to send signals from each set-top box therein to a receiver at the feeder line end. A band stop filter is placed in each auxiliary feeder line to prevent the return signal from set-top boxes being received by more than one feeder line end. The feeder line end has a receiver for the signal from set-top boxes and a means to transmit the signal back to the headend via various mediums. The size of the return path is operator selectable. Further more this system eliminates virtually all ingress noise picked up by the collection of set-top boxes, home wiring and drop wiring entering the cable system.
PCT/CA2001/000556 2000-04-25 2001-04-25 Two way cable system with noise-free return path WO2001082618A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NZ522452A NZ522452A (en) 2000-04-25 2001-04-25 Two way cable system with noise-free return path
CA002407321A CA2407321A1 (en) 2000-04-25 2001-04-25 Two way cable system with noise-free return path
AU2001252082A AU2001252082A1 (en) 2000-04-25 2001-04-25 Two way cable system with noise-free return path
EP01925260A EP1287693A2 (en) 2000-04-25 2001-04-25 Two way cable system with noise-free return path

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US55762900A 2000-04-25 2000-04-25
US09/557,629 2000-04-25

Publications (3)

Publication Number Publication Date
WO2001082618A2 WO2001082618A2 (en) 2001-11-01
WO2001082618A9 WO2001082618A9 (en) 2001-12-06
WO2001082618A3 true WO2001082618A3 (en) 2002-04-11

Family

ID=24226238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/000556 WO2001082618A2 (en) 2000-04-25 2001-04-25 Two way cable system with noise-free return path

Country Status (6)

Country Link
EP (1) EP1287693A2 (en)
CN (1) CN1439226A (en)
AU (1) AU2001252082A1 (en)
CA (1) CA2407321A1 (en)
NZ (1) NZ522452A (en)
WO (1) WO2001082618A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024207A1 (en) * 1995-01-30 1996-08-08 Motorola Inc. Method and system for clearing a frequency band
EP0760584A2 (en) * 1995-08-24 1997-03-05 Alcatel N.V. Electrical transmission system with a wide-band distribution system for TV and audio signals and with a possibility for interactive services
EP0762766A2 (en) * 1995-09-12 1997-03-12 AT&T Corp. Network apparatus and method for providing two-way broadband communications
US5881362A (en) * 1994-11-30 1999-03-09 General Instrument Corporation Of Delaware Method of ingress noise reduction in calbe return paths

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5881362A (en) * 1994-11-30 1999-03-09 General Instrument Corporation Of Delaware Method of ingress noise reduction in calbe return paths
WO1996024207A1 (en) * 1995-01-30 1996-08-08 Motorola Inc. Method and system for clearing a frequency band
EP0760584A2 (en) * 1995-08-24 1997-03-05 Alcatel N.V. Electrical transmission system with a wide-band distribution system for TV and audio signals and with a possibility for interactive services
EP0762766A2 (en) * 1995-09-12 1997-03-12 AT&T Corp. Network apparatus and method for providing two-way broadband communications

Also Published As

Publication number Publication date
AU2001252082A1 (en) 2001-11-07
CN1439226A (en) 2003-08-27
WO2001082618A9 (en) 2001-12-06
NZ522452A (en) 2004-07-30
CA2407321A1 (en) 2001-11-01
EP1287693A2 (en) 2003-03-05
WO2001082618A2 (en) 2001-11-01

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