KR970025111A - Optical CTV System for Video-on-Demand Services - Google Patents

Optical CTV System for Video-on-Demand Services Download PDF

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KR970025111A
KR970025111A KR1019950034319A KR19950034319A KR970025111A KR 970025111 A KR970025111 A KR 970025111A KR 1019950034319 A KR1019950034319 A KR 1019950034319A KR 19950034319 A KR19950034319 A KR 19950034319A KR 970025111 A KR970025111 A KR 970025111A
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South Korea
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video
subscriber
optical transmission
optical
network
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KR1019950034319A
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Korean (ko)
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KR0168935B1 (en
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박승현
강성수
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양승택
한국전자통신연구소
이준
한국전기통신공사
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Priority to KR1019950034319A priority Critical patent/KR0168935B1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H20/00Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65Arrangements characterised by transmission systems for broadcast
    • H04H20/76Wired systems
    • H04H20/77Wired systems using carrier waves
    • H04H20/78CATV [Community Antenna Television] systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2365Multiplexing of several video streams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/254Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2543Billing, e.g. for subscription services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302Content synchronisation processes, e.g. decoder synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4334Recording operations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4347Demultiplexing of several video streams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/22Adaptations for optical transmission

Abstract

본 발명은 CATV 시스템에서 주문형 비디오 프로그램을 제공할 수 있도록 한 광 CATV 시스템을 제공하는데 그 목적이 있다. 상기 목적을 달성하기 위하여 본 발명은 다량의 비디오 프로그램을 저장하고 있으며, 방송형 TV프로그램을 수신하여 저장하고 있는 비디오 프로그램가 다중화하여 전송망을 통해 전송하는 헤드앤드(2)와, 상기 헤드엔드(2)를 통한 다중화된 영상 신호와 전화망(1)을 통한 통신 신호, 타지역 비디오망(3)을 통한 비디오 신호를 전송망을 통해 입력받아 이들 신호와 자신이 저장하고 있는 일정량의 비디오 신호를 가입자 요구에 따라 선정하여 각 지역별로 스위칭하여 광전송망(6)을 통해 출력하는 중심국 장치(5), 및 상기 광전송망(6)에 연결되어 상기 중심국 장치(5)로 부터 전송되어 온 영상 신호 및 통신 채널 신호와 자신이 저장하고 있는 일정량의 비디오 프로그램을 가입자의 요구에 따라 선정하여 가입자망(8)을 통해 각 가입자 댁내장치(9)로 공급하는 다수의 분배센터(7)를 포함한다.SUMMARY OF THE INVENTION An object of the present invention is to provide an optical CATV system capable of providing an on-demand video program in a CATV system. In order to achieve the above object, the present invention stores a large number of video programs, a head end (2) for receiving and storing a broadcast type TV program is multiplexed and transmitted through a transmission network, and the head end (2) It receives the multiplexed video signal through the network, the communication signal through the telephone network (1), and the video signal through the other local video network (3) through the transmission network, and receives these signals and a certain amount of video signals stored by the subscriber according to the subscriber's request. A central station apparatus 5 for selecting and switching for each region and outputting it through the optical transmission network 6, and an image signal and a communication channel signal connected to the optical transmission network 6 and transmitted from the central station apparatus 5; It selects a certain amount of video program stored by the subscriber according to the subscriber's request and supplies it to each subscriber's premises through the subscriber network (8). Of and a distribution center (7).

Description

주문형 비디오 서비스용 광 씨에이티비(CATV) 시스템Optical CTV System for Video-on-Demand Services

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 주문형 비디오 서비스를 제공할 수 있는 본 발명에 따른 광 CATV 시스템의 구조도,1 is a structural diagram of an optical CATV system according to the present invention capable of providing on-demand video service;

제2도는 광 CATV 시스템의 운용에 따른 주문형 비디오 서비스의 처리 흐름도,2 is a flowchart of processing of an on-demand video service according to operation of an optical CATV system;

제3도는 광 CATV 시스템의 중심국 장치에 대한 상세 구성도.3 is a detailed configuration diagram of the central station apparatus of the optical CATV system.

Claims (11)

다량의 비디오 프로그램을 저장하고 있으며, 방송형 TV프로그램을 수신하여 저장하고 있는 비디오 프로그램과 다중화하여 전송망을 통해 전송하는 헤드엔드(2)와, 상기 헤드엔드(2)를 통한 다중화된 영상 신호와 전화망(1)을 통한 통신 신호, 타지역 비디오망(3)을 통한 비디오 신호를 전송망을 통해 입력받아 이들 신호와 자신이 저장하고 있는 일정량의 비디오 신호를 가입자 요구에 따라 선정하여 각 지역별로 스위칭하여 광전송망(6)을 통해 출력하는 중심국 장치(5), 및 상기 광전송망(6)에 연결되어 상기 중심국 장치(5)로부터 전송되어 온 영상 신호 및 통신 채널 신호와 자신이 저장하고 있는 일정량의 비디오 프로그램을 가입자의 요구에 따라 선정하여 가입자망(8)을 통해 각 가입자 댁내장치(9)로 공급하는 다수의 분배센터(7)를 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.A headend (2) for storing a large number of video programs, multiplexing with a video program that receives and stores broadcast-type TV programs, and transmits them through a transmission network, and multiplexed video signals and telephone networks through the headend (2). (1) Receives communication signals through other networks and video signals through other networks through the transmission network, and selects these signals and a certain amount of video signals stored by them according to the subscriber's requirements and switches them to each region. The central station apparatus 5 outputting through the transmission network 6, and the video signal and communication channel signal transmitted from the central station apparatus 5 connected to the optical transmission network 6, and a predetermined amount of video programs stored therein. It is characterized in that it comprises a plurality of distribution centers (7) for supplying to each subscriber premises device (9) through the subscriber network (8) by selecting according to the needs of subscribers Video-on-demand services for optical CATV systems that. 제1항에 있어서, 상기 중심국 장치(5)는 광 CATV 시스템 내의 헤드엔드(2)에서 수신되는 주문형 비디오 프로그램과 타지역 비디오 프로그램을 수신하는 제l 광전송 장치(11), 사전에 선정된 비디오 프로그램을 저장하고 있으며, 상기 제1광전송 장치(ll)를 통해 전달되는 비디오 신호 중 일부를 입력받아 저장하는 비디오 뱅크(15), 상기 제1광전송 장치(1l)에 의해 전달되는 나머지 주문형 비디오 프로그램들을 입력받으며, 상기 비디오 뱅크(15)의 출력단으로 부터의 비디오 신호를 입력받아 스위칭하여 출력하는 스위칭 수단(19), 상기 스위칭수단(19)의 출력을 입력받아 다중화하여 출력하는 다수의 다중기(2l), 상기 다수의 다중기(21)의 출력을 가입자측으로 출력하며, 프로그램 요구 명령을 비롯한 가입자측의 신호를 장치내로 입력하는 다수의 제2 광전송 장치(22), 상기 다수의 제2광전송장치(22)를 통한 가입자측의 프로그램요구 명령을 입력받아 스위칭 제어신호를 출력하고 가입자측의 과금정보 및 상태 정보에 따른 관리를 제어하는 주제어부(2O), 및 상기 주제어부(2O)의 스위칭 제어신호를 입력받아 상기 스위칭 수단(19)의 스위칭을 제어하는 스위치 제어부(23)를 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.The first optical transmission device (11) according to claim 1, wherein said central station device (5) is a first optical transmission device (11) for receiving an on-demand video program received from a headend (2) in an optical CATV system and another region video program. A video bank 15 for receiving and storing some of the video signals transmitted through the first optical transmission device ll, and inputting the remaining on-demand video programs transmitted by the first optical transmission device 1l. A switching means 19 for receiving and switching a video signal from an output terminal of the video bank 15 and a plurality of multiplexers 2l for receiving and multiplexing the output of the switching means 19. And a plurality of second optical transmission devices 2 outputting the outputs of the plurality of multiplexers 21 to the subscriber side and inputting signals of the subscriber side including the program request command into the device. 2) a main control unit 20 which receives a program request command from a subscriber through the plurality of second optical transmission devices 22, outputs a switching control signal, and controls management according to charging information and status information of the subscriber; And a switch controller (23) for receiving the switching control signal of the main controller (20) to control the switching of the switching means (19). 제2항에 있어서, 상기 스위칭 수단(19)은 M개의 입력 프로그램을 프로그램 공급처인 N개의 분배센터(9)로 각기 V개씩의 프로그램까지 교환해 줄 수 있는 스위칭 용량을 갖도록 구성되는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.3. The switching means (19) according to claim 2, characterized in that the switching means (19) is configured to have a switching capacity capable of exchanging up to V programs for each of the M input programs to the N distribution centers 9 as the program supply destinations. Optical CATV system for video on demand services. 제3항에 있어서, 상기 비디오 뱅크(15)에 저장되는 비디오 프로그램을 백업해 두기 위한 하드 디스크 드라이브(HDD) 어레이(18)를 더 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.4. The optical CATV system of claim 3, further comprising a hard disk drive (HDD) array (18) for backing up video programs stored in the video bank (15). 제4항에 있어서, 아날로그 전화망 혹은 디지탈 전화망으로 부터 전송된 통신 신호를 인터페이스하는 B채널 정합부(l3) 및 2B+D 채널 정합부(12), 상기 B채널 정합부(13) 및 2B+D 채널정합부(12)의 출력을 다중화하여 상기 다수의 제2 광전송 장치(22)로 전달하는 다중기(16), 및 상기 다수의 제2 광전송 장치(22)를 통해 전달된 가입자 측의 다중화된 통신 신호를 역다중화하여 상기 B채널 정합부(13) 및 2B+D 채널 정합부(12)로 각각 전달하는 역다중기 (l7)를 더 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.5. The B channel matching section l3 and 2B + D channel matching section 12, the B channel matching section 13, and 2B + D according to claim 4, wherein the B channel matching section l3 and the 2B + D channel matching section 12 interface the communication signals transmitted from the analog telephone network or the digital telephone network. Multiplexer 16 for multiplexing the output of the channel matching unit 12 to the plurality of second optical transmission devices 22, and multiplexing at the subscriber side delivered through the plurality of second optical transmission devices 22 And a demultiplexer (l7) which demultiplexes a communication signal and delivers the communication signals to the B channel matching unit (13) and the 2B + D channel matching unit (12), respectively. 제5항에 있어서, 상기 B채널 정합부(l3)를 거쳐 상위 계위의 클럭을 수신하여 장치내의 필요한 동기클럭을 제공하는 망동기부(14)를 더 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.6. The optical CATV for video-on-demand service according to claim 5, further comprising a network synchronizer (14) for receiving a clock of a higher level via the B-channel matching unit (l3) to provide a necessary synchronization clock in the device. system. 제1항에 있어서, 상기 분배센터(7)는, 광 CATV 시스템측에서 방송형 TV프로그램 신호와 주문형 비디오신호와 통신 채널 신호 및 제어신호를 수신하는 제1광 전송 수단(6l), 상기 제l광전송수단 (61)을 통해 수신된 방송형 TV프로그램 신호를 DS3급에서 PECL로 변환하는 변환부(62), 상기 변환부 (62)의 출력 신호를 스위칭 하여 분배하는 제1스위칭 수단(63), 상기 제1광전송 수단(61)을 통해 수신된 주문형 비디오 신호를 역다중화하는 제1역다중기(67)의 출력 중 가입자 댁내장치(9)에서 프로그램을 요구하는 메뉴 선택을 위한 내용과 필요한 일부의 프로그램 내용을 저장하는 메모리 뱅크(68), 상기 제1역다중기(67)의 출력과 상기 메모리 뱅크(68)의 출력을 스위칭하여 분배하는 제2스위칭 수단(69), 상기 제l및 제2스위칭 수단(63,69)의 출력을 입력받아 방송형 TV프로그램, 주문형 비디오 프로그램, 아날로그 및 디지탈 전화의 채널들을 다중화시켜 광신호로 변환하여 다수의 가입자 댁내장치 별로 분류하여 전송하고, 가입자측의 광신호를 전기적 신호로 변환시켜 장치내로 입력하는 제2광전송 장치(64), 상기 제1및 제 스위칭 수단(63,69)의 스위칭 제어를 수행하는 제1 및 제2스위치 제어부 (65,7O), 상기 제2광전송 수단(64)을 제어하는 광전송 제어 수단(66), 및 상기 메모리 뱅크(68)에 저장 기능을 제어하고, 상기 제1 및 제2스위치 제어부(65,7O)와 광전송 제어 수단(66)을 제어하며, 가입자측의 상태 정보를 포함한 시스템 제어 정보를 관리하는 주제어부(78)를 구비하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.4. The distribution center (7) according to claim 1, characterized in that the distribution center (7) comprises: first optical transmission means (6l) and said first for receiving a broadcast TV program signal, an on-demand video signal, a communication channel signal, and a control signal at the optical CATV system A conversion unit 62 for converting the broadcast type TV program signal received through the optical transmission means 61 into a PECL in the DS3 class, a first switching means 63 for switching and distributing the output signal of the conversion unit 62; Contents for menu selection requesting a program in the subscriber premises 9 among the outputs of the first demultiplexer 67 which demultiplexes the on-demand video signal received through the first optical transmission means 61, and some necessary programs. A memory bank 68 for storing contents, second switching means 69 for switching and distributing the output of the first demultiplexer 67 and the output of the memory bank 68, and the first and second switching means. Broadcast type TV program, main input A second optical transmission device 64 for multiplexing the channels of a sentence video program, an analog and a digital telephone, converting them into optical signals, classifying and transmitting them into a plurality of subscriber premises devices, and converting the optical signals of subscribers into electrical signals and inputting them into the device. ), First and second switch controllers 65 and 70 for performing switching control of the first and second switching means 63 and 69, and light transmission control means 66 for controlling the second light transmission means 64. And control a storage function in the memory bank 68, control the first and second switch controllers 65 and 70O and the optical transmission control means 66, and provide system control information including status information on the subscriber side. An optical CATV system for video-on-demand service, comprising: a main controller 78 for managing. 제7항에 있어서, 상기 메모리 뱅크(68)와 연결되고 상기 주제어부(78)의 제어를 받아 운용 관련 소프트웨어 프로그램들을 백업해 두는 HDD(하드디스크 드라이브)(75)를 더 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.The method of claim 7, further comprising an HDD (hard disk drive) 75 connected to the memory bank 68 and backing up operation related software programs under the control of the main controller 78. Optical CATV system for video on demand services. 제8항에 있어서 제1광전송 수단(61)을 통해 시스템측으로 부터 가입자 통신 채널 정보를 입력받아 역다중화하여 아날로그 정보와 디지탈 정보로 분리하는 제2 역다중기(71), 가입자측의 아날로그 및 디지탈 통신 정보를 입력받아 다중화하여 상기 제1광전송 수단(61)으로 제공하는 다중기(74), 상기 제2 역다중기(71)로 부터의 디지탈 통신 정보를 가입자측으로 정합하고, 가입자 측의 디지탈 정보를 상기 다중기(74)로 정합하는 2B+D채널 정합부(72), 상기 제 2역다중기(71)로 부터의 아날로그 통신 정보를 가입자측으로 정합하고, 가입자측의 아날로그 정보를 상기 다중기(74)로 정합하는 B 채널 정합부(73), 및 상기 주제어부(78)의 제어하에 2B+D 채널 정합부(72)와 B채널 정합부(73)의 출력중 하나를 선택하여 상기 제2광전송 수단(64)으로 출력하고, 제2 광전송 수단(64)으로 부터의 신호를 선별하여 2B+D 채널 정합부(72)나 B 채널 정합부(73)로 전달하는 선택기(76)를 더 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.9. The second demultiplexer (71) according to claim 8, which receives the subscriber communication channel information from the system side through the first optical transmission means (61) and demultiplexes it into analog information and digital information, and analog and digital communication on the subscriber side. The digital communication information from the multiplexer 74 and the second demultiplexer 71 for receiving and multiplexing information to be provided to the first optical transmission means 61 are matched to the subscriber side, and the digital information of the subscriber side is matched with the subscriber side. 2B + D channel matching unit 72 matching to the multiplexer 74, analog communication information from the second demultiplexer 71, to the subscriber side, and analog information of the subscriber side to the multiplexer 74. Selects one of the B-channel matching unit 73 and the outputs of the 2B + D channel matching unit 72 and the B-channel matching unit 73 under the control of the main control unit 78 and the second optical transmission means. Output to 64, and to the second optical transmission means 64 And a selector (76) for selecting a signal from the 2B + D channel matching unit (72) or the B channel matching unit (73). 제9항에 있어서, 상기 제2역다중기(71)와 주제어부(78) 및 다중기(74)와 주제어부(78)간의 신호를 정합하는 데이타 정합부(77)를 더 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.10. The apparatus of claim 9, further comprising a second matching multiplexer (71) and a main control unit (78) and a data matching unit (77) for matching signals between the multiplexer (74) and the main control unit (78). Optical CATV system for video on demand services. 제1O항에 있어서, 상기 제2광전송 수단(64)은, 고가의 고급형 및 주거 분산형 가입자망을 구축할 수 있는 가입자댁내의 망종단부(155NT)와 연결되는 제1 광전송 장치 및 저가의 보급형 및 주거 밀집형 가입자망을 구축할 수 있는 가입자댁내장치의 다수의 망종단부(NT-1,...,NT-k)와 연결되는 제2광전송 장치를 포함하는 것을 특징으로 하는 주문형 비디오 서비스용 광 CATV 시스템.The first optical transmission device and low-cost distribution type of claim 10, wherein the second optical transmission means 64 is connected to a network terminator 155NT in a subscriber's home where an expensive high-end and residential distributed subscriber network can be established. Optical on demand video service, characterized in that it comprises a second optical transmission device connected to a plurality of network end (NT-1, ..., NT-k) of the subscriber premises device that can build a dense residential network CATV system.
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KR100278861B1 (en) * 1998-02-21 2001-01-15 김영환 Telephone service system in cable system
KR100492528B1 (en) * 1997-12-09 2005-09-02 엘지전자 주식회사 Apparatus and method for data transmission using channel change
KR100606102B1 (en) * 2002-08-03 2006-07-28 삼성전자주식회사 Broadcast/communication unified passive optical network system
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KR100311507B1 (en) * 1998-11-27 2001-11-15 서평원 Wide Band Wireless Multi-Media Communication System And Cell Planing Method
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KR100492528B1 (en) * 1997-12-09 2005-09-02 엘지전자 주식회사 Apparatus and method for data transmission using channel change
KR100278861B1 (en) * 1998-02-21 2001-01-15 김영환 Telephone service system in cable system
KR100722705B1 (en) * 1999-03-10 2007-06-04 소니 가부시끼 가이샤 Program distribution apparatus, program distribution method, transmitter and receiver
KR100606102B1 (en) * 2002-08-03 2006-07-28 삼성전자주식회사 Broadcast/communication unified passive optical network system

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