Title:
【発明の名称】双方向多重アクセス通信システム、並びに、このシステムに用いるための中央ステーション及びユーザーステーション
Document Type and Number:
Japanese Patent JPH10502502
Kind Code:
A
Abstract:
A CATV system (1) operating as a two-way multiple access communication system in which a plurality of user stations (US1 to US5) communicate with a central station (CS) which can provide video programs. The system (1) can be an interactive TV system in which the user stations (US1 to US5) can order a specific program, or can respond to multiple choice questions in a program, or the like. For exchanging session accompanying information between the central station (CS) and the user stations (US1 to US5) a common control channel is provided. For true interactivity in high capacity and high user density systems, session accompanying control information is exchanged between the central station (CS) and the user stations (US1 to US5) via dedicated control channels (DSCS, USCS). Such a system (1) satisfies the needs of all kinds of multi-media systems, interactivity being an important feature in such systems.
Inventors:
Devot Paulus George Maria
Application Number:
JP50061396A
Publication Date:
March 03, 1998
Filing Date:
June 06, 1995
Export Citation:
Assignee:
Philips Electronics Nemrose Fennaught Shap
International Classes:
H04N7/08; H04H20/38; H04H60/96; H04L12/28; H04N7/081; H04N7/16; H04N7/173; H04N21/21; H04N21/23; H04Q7/24; H04Q7/38; H04H20/79; H04H60/91; H04H60/97; (IPC1-7): H04N7/16; H04N7/08; H04N7/081
Attorney, Agent or Firm:
Akihide Sugimura (6 others)