Remote link adapter for use in TV broadcast data transmission system

• US 5,347,304 A
• Filed: 07/28/1993
• Issued: 09/13/1994
• Est. Priority Date: 09/10/1991
• Status: Expired

• Current Assignee: Hybrid Patents Incorporated
• Original Assignee: Hybrid Networks, Inc. (Iowave, Inc.)
• Inventors: Long, James C., Moura, Eduardo J.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): FAILE, ANDREW I
• Application Number:
  US08/098,764
• Time in Patent Office: 412 Days
• Field of Search: 455/4.2, 455/5.1, 455/6.1, 455/6.2, 455/6.3, 358/84-86, 370/73, 370/76, 348/1, 348/12, 348/13, 348/15, 348/17, 375/36
• US Class Current: 725/131
• CPC Class Codes: H04H 20/30 by a single channel
• CPC Class Codes: H04H 60/15 on receiving information
• CPC Class Codes: H04H 60/80 characterised by transmission among terminal devices
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04M 11/08 specially adapted for optional reception of entertainment or informative matter
• CPC Class Codes: H04N 1/00098 via a television channel, e.g. for a series of still pictures with or without sound
• CPC Class Codes: H04N 7/088 the inserted signal being digital
• CPC Class Codes: H04N 7/173 with two-way working, e.g. subscriber sending a programme selection signal

Abstract

A hybrid transmission system is provided to transmit and receive high-speed digital information in the form of variable length packets using standard television practices and components. The basic building block of this hybrid digital transmission system is the device at the remote location that receives the analog broadcast TV-like signal processed by a standard vestigial sideband video modulator. This device decodes the digital information from the signal and then passes it along as digital information to any form of a data terminal equipment or computer.

Claims

1. In a high speed digital information transmission system in which multi megabit per second digital data is addressably broadcast using contiguous bandwidth in a television channel to a remote site, a remote link adapter comprising

a hybrid interface for receiving and demodulating a multi megabit per second digitally encoded signal to verify an address and obtain the transmitted digital data, said hybrid interface providing a full duplex asymmetric network connection which is constructed from independent forward and return transmission channels in two directions,

a user interface for providing said digital data to data terminal equipment,

microprocessor control means for controlling said hybrid interface in accordance with protocols for controlling the flow of said digital data and the addressing in the forward and return transmission channels, and

a bus interconnecting said user interface, said hybrid interface, and said microprocessor control means.

2. The remote link adapter as defined by claim 1 wherein said return channel includes a telephone line modem.

3. The remote link adapter as defined by claim 1 wherein said return channel includes a radio interface.

4. The remote link adapter as defined by claim 1 wherein said return channel includes a CATV interface.

5. The remote link adapter as defined by claim 1 wherein

said user interface includes an Ethernet interface,

said digital data are broadcast at multi megabit per second data rates using the frequency spectrum of a 6 MHz television channel, and

said return channel is provided by an independent transmission path with data transmission rates of at least 9600 bits per second whereby said remote link adapter operates in a high speed asymmetric data transmission system.

6. The remote link adapter as defined by claim 1 wherein said user interface includes a personal computer bus interface.

7. The remote link adapter as defined by claim 1 wherein said user interface interfaces with a video game system.

8. The remote link adapter as defined by claim 1 wherein said hybrid interface includes an RF modem.

9. The remote link adapter as defined by claim 1 wherein said microprocessor control means controls the addressing of said hybrid interface and the flow of data in said bus to any number of multiple users connected to the user interface.