Audio/video signal redistribution system

• US 6,038,425 A
• Filed: 08/03/1998
• Issued: 03/14/2000
• Est. Priority Date: 08/03/1998
• Status: Expired due to Term

• Current Assignee: Northvu Incorporated
• Original Assignee: Ross A. Jeffrey
• Inventors: Jeffrey, Ross A.
• Primary Examiner(s): Kostak, Victor R.
• Application Number:
  US09/127,963
• Time in Patent Office: 589 Days
• Field of Search: 455/3.1, 455/4.1, 455/4.2, 455/6.1, 455/6.2, 455/6.3, 348/6, 348/8
• US Class Current: 725/80
• CPC Class Codes: H04L 1/22 using redundant apparatus to increase reliability
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 11/08 specially adapted for optional reception of entertainment or informative matter
• CPC Class Codes: H04N 7/106 for domestic distribution
• CPC Class Codes: H04N 7/108 the cable being constituted by a pair of wires

Abstract

A system for redistributing a multiple input audio/video signals having a redistributing device equipped to receive signals in a multiple formats and redistribute a selected signal to a user'"'"'s premises over existing twisted-pair telephone wire. The redistributing device is in interactive communication with a communications interface located in the user'"'"'s premises which receives user-input control signals and contains switching circuitry which routes the selected signal to the user'"'"'s premises where it is received by the receiving unit such as a television receiver. A single redistributing device services an entire multi-user network from a common distribution point, and services multiple users independently. The system of the invention does not interfere with normal use of the telephone network, so users can interactively access services provided by the system and use the telephone at the same time.

Claims

1. A system for redistributing a plurality of audio/video signals to a plurality of communications interfaces over twisted-pair wiring, comprising

a server,

a redistributor for receiving a plurality of input signals, comprising

for each input signal, a demodulator for demodulating the signal, the server controlling an output channel selection of the input signal responsive to one or more control signals input into the communications interface,

for each communications interface, a switching device for routing the channel selection to an output of the redistributor, the switching device being controlled by the server responsive to one or more control signals input into the communications interface, and

for each demodulated input signal, a processor for processing the signal for switching,

wherein the communications interface receives the output of the redistributor for transmission to a receiving unit connected to the communications interface.

2. The system of claim 1 in which the input signals are in different signal formats.

3. The system of claim 1 in which the processors match the impedance of the demodulated input signal to the output impedance of the redistributor, raise the baseband of the demodulated input signal, equalize the high frequency components and increase the level of chroma of the demodulated input signal, and increase the peak-to-peak voltage of the demodulated input signal.

4. The system of claim 1 in which the output of the redistributor is transmitted to the communications interface over an unused twisted pair of a telephone wire.

5. The system of claim 4 in which the one or more control signals are transmitted to the redistributor over a twisted pair of a telephone wire.

6. The system of claim 5 in which the twisted pair over which the one or more control signals are transmitted to the redistributor carries a telephone signal.

7. The system of claim 1 in which the communications interface includes an optical interface for receiving the one or more control signals from an infrared remote control device.

8. The system of claim 1 in which the communications interface includes a data interface for receiving data from a keyboard, joystick, card reader, bar code reader or other data providing device.

9. The system of claim 1 in which the communications interface includes a network interface for transmitting data from a computer to the redistributor over a second unused twisted pair in a telephone wire.

10. The system of claim 1 in which the communications interface modulates the output of the redistributor to a selected channel of the receiving device.

11. A method of redistributing a plurality of audio/video signals to a plurality of communications interfaces over twisted-pair wiring, comprising the steps of

(a) receiving a plurality of input signals at a signal redistributor,

(b) demodulating each input signal,

(c) processing each input signal to a format suitable for switching,

(d) switching an output of the redistributor according to one or more control signals input into a communications interface, and

(e) routing the output of the redistributor to the communications interface,

wherein the output of the redistributor is received by a communications interface for transmission to a receiving device.

12. The method of claim 11 in which the input signals are in different signal formats.

13. The method of claim 11 in which the step of processing each input signal to a format suitable for switching comprises matching the impedance of the demodulated input signal to the output impedance of the redistributor, raising the baseband of the demodulated input signal, equalizing the high frequency components and increasing the level of chroma of the demodulated input signal, and increasing the peak-to-peak voltage of the demodulated input signal.

14. The method of claim 11 including the step of transmitting the output of the redistributor is to the communications interface over an unused twisted pair of a telephone wire.

15. The method of claim 14 including the step of transmitting one or more control signals to the redistributor over a twisted pair of a telephone wire.

16. The method of claim 15 in which the twisted pair over which the one or more control signals are transmitted to the redistributor carries a telephone signal.

17. The method of claim 11 in which the communications interface includes an optical interface for receiving the one or more control signals from an infrared remote control device.

18. The method of claim 11 in which the communications interface includes a data interface for receiving data from a keyboard, joystick, card reader, bar code reader or other data providing device.

19. The method of claim 11 in which the communications interface includes a network interface for communicating data from a computer to the redistributor over a second unused twisted pair in a telephone wire.

20. The method of claim 11 including the step of modulating the output of the redistributor to a selected channel of the receiving device.