KR950010614A

KR950010614A - Digital C.T.V system consisting of small distribution centers

Info

Publication number: KR950010614A
Application number: KR1019930019539A
Authority: KR
Inventors: 이만섭; 강성수; 유강희; 전영윤; 정주홍; 박승현
Original assignee: 양승택; 재단법인 한국전자통신연구소
Priority date: 1993-09-23
Filing date: 1993-09-23
Publication date: 1995-04-28
Also published as: KR960010489B1

Abstract

본 발명은 고속 디지틀 대용량의 광전송 기술과 함께 방송 프로그램의 아날로그 데이타를 디지틀 데이타로 변환하는 기술, 다중화된 디지틀 프로그램 채널들을 가입자로부터 요구된 채널 선택 정보에 의한 논블럭킹(nonblocking) 분배 스위치에서의 방송형 스위칭 기술, 그리고 공중통신망과 연계한 통신 채널 서비스(전화 혹은 ISDN 단말)를 가입자에게 제공할 수 있는 소형의 분배센터들로 구성되는 디지틀 CATV 시스템을 제공하는데 그 목적이 있으며 헤드 앤드 서브 시스템(41)과 상기 헤드 앤드 서브 시스템(41)과 외부의 고통 통신망 교환기에 연결된 중심국 서브 시스템(42)과 상기 중심국 서브 시스템(42)에 연결된 다수의 소형 분배 센터 서브시스템(43a 내지 43m)과 상기 소형 분배 센터 서브시스템(43a 내지 43m)에 동축 케이블 및 광케이블로 연결되는 다수의 가입자 장치(44,45)를 구비한다.The present invention is a technique for converting analog data of a broadcast program into digital data together with a high-speed digital large-capacity optical transmission technology, and broadcast type in a nonblocking distribution switch based on channel selection information requested by subscribers. Its purpose is to provide a digital CATV system consisting of small distribution centers capable of providing subscribers with switching technology and communication channel services (telephone or ISDN terminals) in connection with public telecommunication networks. A central station subsystem 42 connected to the head and subsystem 41 and an external toll network switch, a plurality of small distribution center subsystems 43a to 43m connected to the central station subsystem 42 and the small distribution center sub A number of coaxial and optical cables to the systems 43a to 43m Subscriber devices 44 and 45 are provided.

Description

Digital C.T.V system consisting of small distribution centers

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제5도는 본 발명인 소형의 분배 센터들로 구성되는 디지틀 CATV 시스템5 is a digital CATV system consisting of the small distribution centers of the present invention.

Claims

A central station subsystem 420 connected to the head and subsystem 41 and the head and subsystem 42 and an external common network switch and a plurality of small distribution center subsystems 43a to 43m connected to the central station subsystem 42. And a plurality of subscriber units (44,45) connected by coaxial and optical cables to the small distribution center subsystem (43a to 43m).

2. The head and subsystem (41) according to claim 1, wherein the head and subsystem (41) comprises a plurality of TV program encoders (1a to 1n) and a stereo audio program encoder (2) and the plurality of TV and stereo audio data of analog signals to digital data. A DS3 matcher (3) for matching TV and stereo audio data digitalized by the TV program encoders (1a to 1n) and the stereo audio program encoder (2) to DS3 (44.736 Mbps digital data group) class data, and the DS3. A central station subsystem for converting the digital data output from the matcher 3 into a high speed digital data group, and converting a high speed electrical signal output from the high speed multiplexer 4 into an optical signal. And a optical transmitter (5) for transmitting through the optical cable.

2. The central station subsystem (42) according to claim 1, wherein the central station subsystem (42) communicates with the optical receiver (11) and the public communication network for converting high-speed optical signals for TV and stereo audio transmitted from the head and subsystem (41) into electrical signals. It is connected to the telephone matching unit 13 and the ISDN matching unit 14 and the telephone matching unit 13 and the ISDN matching unit 14 for matching with the channels and maintains these communication channels and the billing information and maintenance system. One end of the maintenance receiver 12 and the optical receiver 11 connected to the high speed multiplexer and demultiplexer 15 and the high speed multiplexer and demultiplexer 15 for multiplexing and demultiplexing a maintenance management channel. Electrical signals to connect the data from the relay and distributor 16 and the relay and distributor 16 to a plurality of small distribution subsystems for bi-directional communication between and the high speed multiplexer and demultiplexer 15. A plurality of optical transceivers (17a to 17n) digital CATV system comprising the that converts or convert an optical signal into an electrical signal to.

The unit compact distribution center service system constituting the plurality of small distribution center subsystems 43a to 43m is provided with an optical transceiver 21 for communicating with the central station subsystem 42 by an optical signal. A program that is connected to one end of the optical transmitter and receiver 21 for fast demultiplexing digital data for TV and stereo audio programs in one direction and data passed through the high speed demultiplexer 23 from the subscriber. The first and second high speed multiplexers and demultiplexers 24 are used for multiplexing and demultiplexing digital data for a communication channel via the distribution switch 25 and the optical transceiver 21 for broadcasting type distribution switching according to selection information. A telephone matching unit 26 and an ISDN matching unit 27 connected to the medium and high speed multiplexer and demultiplexer 24, and a medium and high speed multiplexer and demultiplexer 24. The maintenance management unit 28 which is responsible for the breakdown management of the distribution TV subsystem and the breakdown management of the distribution TV subsystem which the subscriber subscribed to, and the digital data and the telephone matching unit for the switched program via the distribution switch 25. The data of the second medium / speed multiplexer and the demultiplexer 29 and the second medium / speed multiplexer and the demultiplexer 29 which transmits data passing through the 26 and the ISDN matching unit 27 to the subscriber. A digital CATV system comprising an optical transceiver (220) and a transceiver (30) for transmitting to a subscriber device via an optical cable as an optical signal transmission medium and a coaxial cable as an electrical signal transmission medium.

The unit subscriber unit constituting the plurality of subscriber units (45) is connected to an optical transceiver and a transceiver (31) connected to the small distribution center subsystem (43a to 43m) or a directly connected optical cable and a coaxial cable. Digital data and communication channels and transceivers 31 for TV and stereo programs connected through and switched, and a high speed demultiplexer and multiplexer 32 and the medium speed demultiplexer for demultiplexing and separating the digital data for the optical transceiver. The TV program decoder 33 for converting the digital data for TV programs separated by the neutralizer and the multiplexer 32 into analog data and outputting the stereo audio program digital data separated by the high-speed demultiplexer and the multiplexer 32 A stereo audio program decoder 34 for converting the analog data into analog data, and the medium-speed demultiplexer A digital CATV system, comprising: a telephone matcher (35) and an ISDN matcher (36) for transmitting to a telephone or an ISDN telephone and a terminal as digital data for a communication channel separated by the multiplexer (32).

※ Note: The disclosure is based on the initial application.