Title:
【発明の名称】高速両方向デジタルケーブル送信システム
Document Type and Number:
Japanese Patent JPH10501930
Kind Code:
A
Abstract:
A high speed bidirectional cable transmission system for CATV and other television systems includes unidirectional transmission of video signals from a head end unit to a plurality of transceivers or subscribers connected to a transmission line. The head end unit encodes voice data using QPSK encoding and time division multiplexing of the encoded data in a plurality of frequency bands to the subscribers. Each subscriber attached to the cable for receiving continuous transmission of voice and video data is assigned an identification number and at least one voice channel for selectively accessing data. Each subscriber includes a transmitter for transmitting voice data on the cable to the head end unit using time division multiple access transmission of bursts of data in a plurality of frequency bands.
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Inventors:
Puff thomas michael
Graham Hatch
Graham Hatch
Application Number:
JP52571095A
Publication Date:
February 17, 1998
Filing Date:
March 14, 1995
Export Citation:
Assignee:
Stanford Telecommunications Inc.
International Classes:
H04J3/00; H04J4/00; H04L7/04; H04L12/28; H04L27/00; H04N7/10; H04N7/173; H04N21/2383; H04N21/438; (IPC1-7): H04J4/00; H04J3/00; H04N7/16
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)