KR0143937B1 - Bidirectional catv system - Google Patents

Abstract

The present invention relates to a two-way CATV system for serving a public broadcast or self-casting within a certain area, comprising: an editing apparatus for producing, editing, and recording various programs, and for editing and transmitting a program using various special effects; A transmission device for distributing and transmitting public and satellite broadcasts received through a reception facility and a program produced by the editing device; A plurality of terminal apparatuses for selecting and viewing any broadcast among multichannel broadcasts transmitted from the transmitting device; And a control device for controlling the entire system by performing data communication with the devices, public broadcasting and satellite broadcasting retransmission, self TV broadcasting, reverse broadcasting (mobile broadcasting), text broadcasting, and You can check the status of the device.

Description

Two-Way Cable T.V System

1 is a schematic diagram of an interactive CATV system

2 is a schematic diagram of an interactive CATV system.

3 is a detailed block diagram of an interactive CATV system.

4a and 4b show the appearance and configuration of the CATV terminal

5a, 5b is an external view and configuration diagram of the multi-function terminal

6A to 6D are diagrams for explaining the operation of the bidirectional CATV system.

7 is a flowchart for performing forced broadcasting for each terminal in an interactive CATV system.

8 is a flowchart for watching self-casting in each terminal of an interactive CATV system.

The present invention relates to a two-way CATV system for servicing public broadcasting or self-broadcasting within a certain area including an Intelligent Building System (IBS) building.

As the society develops, the necessity of the image information is increasing, a large amount of information is required accordingly, and the efficient use of the image information is required, and an interactive CATV system that can effectively deliver public broadcasting or self-casting to users in a certain area. Is required.

An object of the present invention is to provide an interactive CATV system for servicing public broadcasting or self-casting within a certain area.

An interactive CATV system according to the present invention for achieving the above object comprises an editing apparatus for producing, editing and recording various programs, for editing and transmitting the programs using various special effects; A transmission device for distributing and transmitting public and satellite broadcasts received through a reception facility and a program produced by the editing device; A plurality of terminal apparatuses for selecting and viewing any broadcast among multichannel broadcasts transmitted from the transmitting device; And a control device for controlling the entire system by performing two-way data communication with the devices.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a schematic diagram of a two-way CATV system. In the two-way CATV system, a CATV terminal 18 or a multifunctional terminal 19 is installed in each office and meeting room using a broadband transmission path including a bidirectional amplifier 15 and a distributor 17 around the broadcast transmission system 13. By providing the video information where the video information is needed, and can check the terminal status in the data collection room 14, and provides a variety of services such as mobile broadcasting (16).

In addition, the editing room 11 itself produces and edits various videos to supply a fast and individualized broadcast program, and is also linked to the video conferencing and image retrieval system 12. In addition, by producing a program of its own, it is possible to produce and edit a program utilizing the characteristics of the facility. The introduction of an interactive system enables direct broadcasting to a terminal or live broadcasting at any place.

2 shows the overall configuration of a two-way CATV system. The bidirectional CATV system 21 is largely divided into a center unit 22, a transmission unit 23, a terminal unit 24, and the center unit 22 is an editing unit 25 and an H / E unit 26, and The terminal unit 24 is divided into a dedicated terminal 27 and a multifunctional terminal 28.

Two-way CATV system is composed of two-way system to access various video information from any place in the installation facility, and is configured to enable mobile live broadcasting in any place with a simple connection from the terminal. In addition to the retransmission of public and satellite broadcasts, the coaxial cable's broadband capability provides each terminal with its own broadcast program. The multi-function terminal is a terminal using a PC, which can service all channels of CATV, but is excluded from the forced broadcast transmission target in the CATV center.

3 shows a detailed block diagram of an interactive CATV system. The two-way CATV system includes a reception equipment 31, an editing room 32, a VRS room 33, an operation room 34, an H / E room 35, a transmission line 36, a station relay broadcasting unit 37, and a terminal. It is divided into parts 38, and each function is as follows.

The editing room 32 is provided with a transmission facility, a photographing facility, a recording facility, an editing facility, etc. to produce, edit, and record various programs, and to edit and transmit programs using various special effects. And CATV terminal control. That is, it is responsible for controlling the terminal TV power supply automatically after the completion of the forced or group broadcast for each terminal or broadcasting, and monitors various A / V sources.

The H / E room 35 includes a satellite broadcasting retransmission unit and a TV retransmission unit that receive public and satellite broadcasts through the reception facility 31, a self-broadcasting unit for self broadcasting produced in the editing room 32, and a VRS room 33 VRS broadcasting unit for the video service provided by the mobile station, a reverse relay broadcasting unit for mobile broadcasting, and an RF signal processing unit for distributing and processing these various signals, receiving public and satellite broadcasting, and transmitting the TV signal to the transmission line ( 36) to transmit to each terminal, and to be linked with other video system (eg, video conferencing system, CCTV system, etc.).

The operation room 34 performs data communication with the editing room 32, the VRS room 33, and the H / E room 35 to control the entire system so that an appropriate service is achieved.

The transmission path 36 maintains and transmits various signal transmission and reception signals between the H / E room 35 and each terminal at a predetermined signal level, and may be connected to the reverse relay broadcasting facility 37.

The terminal 38 may select and watch a multi-channel broadcast, and all functions of the terminal, for example, functions such as TV power on / off, volume up / down, channel number selection, etc., may be remotely controlled by a remote controller.

The bidirectional CATV system having the configuration as described above may perform the following functions.

1. Various program provision function: Provide public broadcasting, satellite broadcasting, self broadcasting, conference room screen, other self-producing program screen.

2. Centralized control: All devices are controlled centrally by the host computer of the center, and the center can identify the status of all terminal statuses.

3. Special video and subtitle processing function: SEG, DVE, and subtitle generator can mix and output video signals such as video synthesis graphic and subtitle to produce and send special video.

4. Terminal remote control function: Turns on / off the power of the terminal TV monitor according to the signal transmitted from the two-way CATV center, sets the group according to the position of the terminal device, and turns on / off the power of the monitor according to the group. You can send a different program. When the forced broadcast is sent, the screen being watched is automatically switched to the forced broadcast channel, and when the forced broadcast ends, the screen is returned to the screen that was being watched before the broadcast. The remote control is used to control all functions such as power on / off, channel and volume up / down.

5. Live broadcasting and recording function: It is possible to transmit from any terminal port during live broadcasting, and it is possible to use the VTR installed in the control room of the two-way CATV center and the editing room or the VTR installed in the VRS room to display a specific screen input to the broadcast screen and control room if necessary. You can record and play back.

6. Automatic sending function: The program can be automatically sent by designating batch and group.

The following describes in detail the devices and their functions required for each component of the interactive CATV system.

The editing room 32 includes a photographing apparatus, a lighting apparatus, an editing apparatus, a recording apparatus, a monitor apparatus, an audio apparatus, a control apparatus, and other connection apparatuses.

The photographing apparatus is a camera and its accessories capable of photographing indoors and outdoors and providing high quality images by employing 3CCD.

The lighting device includes a fixed LIGHT for providing appropriate illumination when shooting indoors or in a dark place, and an ENG-type LIGHT for use in a place requiring mobility or where a fixed LIGHT cannot be used.

The editing device is equipped with an ECU (Ecliting Control Unit) that can automatically edit and batch edit under the control of VTR and SEG, and a SEG (Accelerator, WIPE, etc.) that accepts source video sources and produces and sends special video programs according to special effects (DISSOLVE, WIPE, etc.). Special Effect Generator), Synchronous Signal Generator (SYNC Generator) for generating synchronization signal and synchronizing synchronization of each video device, Special Effects Device for processing digital signal, DVE (Digital) to provide various images by special effects. Video Effectoe), and CG (Computer Graphic) for graphically providing a still image for broadcasting or generating subtitles of a screen.

The recording device is used for recording and playing back broadcast programs, and is used for recording and playing back broadcast programs and VTR (beta cam) for providing high quality video and editing still images. Used VTR (S-VHS) and the like.

The monitor device includes a PRVIEW and program monitor for motoring images before and after video transmission, and a monitor that monitors various source screens, transmission screens, recording and editing screens, and employs dedicated A / V terminals.

The audio device synthesizes and transmits various voice signals, records audio signals, and adopts audio signal level according to the situation. Cassette Deck provides a voice source by playing and recording cassette tapes. It is used for talk or interview, and wirelessly transmits various voice signals, and includes a wireless microphone including a wireless tuner and an antenna and a speaker for monitoring various audio signals in an editing room.

The control device consists of a PC for CATV control, CATV forced broadcasting (batch and group broadcasting), CATV terminal forced power ON / OFF VTR control (PLAY, REW, FF, STOP), data communication with host computer, and continuous designation of VTR. Has the function.

In addition, the other connection device amplifies and distributes the audio signal, ADA capable of six outputs from one input, amplifies and distributes the video signal, VDA capable of six outputs from one input, measurement and manual switching of the audio signal. Audio patch, audio patch for video signal measurement and passive congestion, and a rack and console for mounting and mounting various devices.

The H / E room 35 includes a broadcast receiving device, an RF converter, a monitor and a control device, and other connection devices.

The broadcast receiver is a public antenna for receiving public broadcasts (KBS1, KBS2, EBS, MBC, SBS, AFKN), a satellite antenna for receiving satellite broadcasts (NHK1, NHK2), and BS, a receiver for receiving satellite broadcasts. A tuner, a BS converter, and the like.

The RF converter is a modulator for converting a baseband video signal into an RF signal or modulating the video signal of a corresponding channel, and a demodulator for converting an RF signal into a baseband video signal or demodulating the video signal of a corresponding channel. ), RF Splitter for distributing up to 12 RF signals, RF Mixer for mixing up to 12 modulated RF signals, and converting RS-232C data signals to RF signals or converting RF signals to RS-232C And a dual communication filter for channel separation such as an RF modem for converting into a data signal and a forward channel (5-108 MHz) and a reverse channel (174-450 MHz).

The monitor and the control device are a monitor for monitoring the transmitted video signal, a 2-way terminal for selecting a channel by tuning the RF signal and controlling the terminal by data communication with the center, and a host computer. And a CATV terminal PC for data communication with the CATV terminal and the multi-function terminal and displaying the data communication state on the screen.

In addition, the other connection device amplifies and distributes the audio signal, ADA capable of six outputs from one input, amplifies and distributes the video signal, VAD capable of six outputs from one input, and manual measurement of audio signals. Audio patch, video patch for video signal measurement and manual stagnation, power supply for supplying input power of equipment, AVR for supplying stable power to various equipment, and various equipment And racks and consoles for mounting the stationary.

The transmission path 36 includes a bridge amplifier, an extender amplifier, a power supply, a power inserter, a directional coupler, a splitter, and a directional tap. Directional Tap), and OUT LET.

The Bridge Amplifier is an amplifier that distributes the distribution line signal evenly (2/3/4 distribution). It has a built-in auto gain control (AGC) function and the output signal is 100 kHz or less. The extender amplifier amplifies the distribution line signal and supplies it to the terminal, and the input signal is 75 kHz or more.

The power inserter supplies power to the amplifier on the transmission path and is installed according to the capacity and distance of the amplifier. The power inserter supplies power from the power supply to the transmission path and is installed according to the capacity and distance of the amplifier.

Directional coupler (Directional Copler) is a passive device that maintains a constant output of the terminal by dividing one signal into two or more signals (4, 6, 8 distribution). A splitter is a passive element that distributes one signal equally into two or more signals.

Directional taps are passive devices that distribute signals evenly to multiple terminals using distribution lines. The OUT LET is a passive element for connecting a terminal.

The terminal unit 38 is divided into a CATV dedicated terminal and a multifunctional terminal.

The CATV dedicated terminal includes a 2-way terminal, a remote controller, a monitor and a speaker, and a rack.

2-way terminal (Diplex Filter Unit) to separate the forward and reverse signal and transmits, to receive the control signal of the controller to automatically select the channel Tuning unit (Tunung unit), to tune the RF signal to convert the data signal to the control unit and demodulate the control signal to the RF signal RF modem unit (RF MODEM Unit) for transmitting the control signal to the center, the signal of the remote control A sensor unit for identification, and a monitor power adapter unit for controlling the power supplied to the monitor. The remote controller can select its own, public or satellite channel, VRS request, monitor power control and CCTV screen. The monitor and speaker receive the tuned signal from the bidirectional transducer, display it on the screen, and deliver the voice. The rack mounts a two-way terminal, a monitor, and a speaker, and is configured to be beautiful in appearance and harmonious with surrounding facilities.

The multi-function terminal consists of a 2-way terminal, an image capture board, a speaker and a PC and a monitor.

2-way terminal (Diplex Filter Unit) to separate the forward and reverse signal (Diverse Filter Unit), to receive the control signal of the controller to automatically select the channel Tuning unit (Tunung Unit), and converts the RF signal to the data signal to the control unit and demodulates the control signal to the RF signal and includes a RF modem unit (RF MODEM Unit) for transmitting the control signal to the center. An image capture board is a board that can be embedded in a PC. The image capture board can receive a video signal and an audio signal to configure various video screens on the PC monitor or to adjust the color and contrast of the video screens. The speaker delivers the signal tuned to the bidirectional transducer in voice. PCs and monitors can watch CATV public and satellite broadcasts, display VRS and CCTV screens, or support various business software operations in conjunction with LAN.

4a and 4b show the appearance and configuration of the CATV terminal, and 5a and 5b show the appearance and construction of the multifunction terminal.

Meanwhile, the bidirectional CATV system according to the present invention can operate in conjunction with other systems such as a TV conference system, a VRS system, and a conference support system.

Interworking with TV conferencing system can record and edit the meeting scene by interlocking with TV conferencing system in CATV editing room, and can be used as interactive CATV broadcasting program by exchanging video source with remote site using CODEC of broadcasting center. The CATV communication channel can be used for simultaneous viewing.

The interworking with the VRS system can be used for program production by receiving video information such as moving picture, still picture, guide screen, etc. in conjunction with the VRS system in the CATV editing room, and the VRS video information can be received from the CATV terminal. Access to VRS from a CATV terminal can be performed by operating the LOCK or UNLOCK in the broadcasting center.

Interworking with CCTV system can be recorded according to surveillance situation by CCTV by linking with CCTV system in CATV editing room, and it can be used for program production. And by using the two-way CATV transmission path can be provided with the service of CCTV system, CATV terminal can select the corresponding CCTV channel to monitor the desired screen.

In addition, in connection with the meeting support system, programs such as lectures, lectures, and seminars can be recorded in the CATV editing room in conjunction with the meeting support system (TV meeting room, conference room, auditorium). The program can be provided, and simultaneous viewing is possible on the terminal if necessary. In this case, however, it can only be used when permission is given by the broadcasting center.

Figures 6a-6d are diagrams for explaining the operation of the bidirectional CATV system, Figure 6a is the operation of the entire system, Figure 6b is the operation of the CATV center, Figure 6c is the operation of the transmission path, and Figure 6d is a terminal It is a figure for explaining the operation of a part.

FIG. 6A is a diagram illustrating an operation of the entire system, and controls all terminals 615 through a bidirectional communication network between all terminals 615 and the transmitter 613 centering on the CATV center 611. In 615, the user can select and view various materials transmitted from the CATV center 611 using a remote controller.

CATV center 611 performs functions such as broadcasting production, terminal control, broadcasting reception and transmission, VTR data production, and transmits CATV broadcasting services such as forced broadcasting, public and satellite broadcasting, and self-producing broadcasting. Provide to each terminal through.

FIG. 6B is a diagram illustrating the operation of the CATV center 611 shown in FIG. 6A. The CATV center is divided into an editing unit 621 and an H / E unit 623, and the editing unit 621 operates on an image. Signal editing and copying, sound effects and recording, automatic transmission, live broadcasting, VRS data editing filing, broadcast monitoring functions, etc., H / E unit 623 receives the broadcast with the editing unit 621, transmission unit It is in charge of the operation of (625).

In other words, the editing unit 621 produces a program according to various special effects using SEG, DVE, CG, etc., controls, controls, records, and edits the VTR using the ECU, and transmits the recorded VTR tape to the transmission VTR. It is mounted and automatically sent to each terminal. In the H / E unit 623, the operator controls everything for various services, and collects data for overall operation with a host computer.

FIG. 6C is a diagram illustrating the operation of the transmitter 613 shown in FIG. 6A. The output of the camera and microphone or the VTR is connected to a reverse relay modulator, and the output of the reverse relay modulator is connected to the CATV terminal OUTLET 635. (Broadcast) (637), and the power of each of the amplifiers 631 (including the bidirectional amplifier and the automatic gain controller (AGC)) on the line is a medium voltage feed method. Supply from the power supply. The distributor and brancher 633 distributes and branches the signals from the H / E unit and the mobile broadcast signal.

FIG. 6D is a diagram illustrating an operation of the terminal unit 615 shown in FIG. 6A. The terminal includes a two-way terminal 643, a monitor, and a speaker 645. It is controlled by the added remote controller 641, and when there is no remote control can be manually operated terminal, and through the transmission path 647 to watch the internal broadcasting, satellite broadcasting, public broadcasting, etc. VRS data can also be requested have. The multi-function terminal can be configured using a computer to be used for OA during normal use, and to watch CATV broadcasting when necessary.

The remote controller 641 increases or decreases channel tuning or volume of the terminal 643, and the 2-way XJALSKF 643 receives signals and data transmitted from the transmission path 647 to tune or data-CATV broadcast and monitor And the speaker 645 displays the channel or the image data tuned by the broadcast signal transmitted from the two-way terminal (643) on the monitor.

7 is a flowchart for performing forced broadcasting for each terminal in a two-way CATV system.

When a signal for forced broadcasting is transmitted from the bidirectional CATV center (71), each terminal checks whether the user is watching TV (72). If not watching TV, the terminal automatically turns on. Automatically select a channel for all terminals to be forced broadcast (74), and forced broadcast by the forced broadcast signal transmitted from the center (75).

When a signal for terminating forced broadcasting is generated (76), the presence or absence of TV watching before each forced broadcasting is checked (77) to return to the previously watched channel (78) or the power is turned off (79).

8 is a flowchart for watching self-casting in each terminal of an interactive CATV system.

First press the power key (81), the monitor powers on, the CATV screen appears, and the channel number appears on the 2-way terminal display. When the desired channel number is selected by using the number keys of the remote controller (82), the selected channel number appears on the 2-way terminal. Channel UP / DOWN key increases channel number by pressing UP key, channel number decreases by pressing DOWN key, and channel number changes continuously when kept pressed.

Adjust the volume using the volume up / down keys (83). Volume UP / DOWN key increases the volume when UP key is pressed and volume decreases when DOWN key is pressed.

If the user wants to select and watch another channel (84), the desired channel is selected again by using the channel UP / DOWN key (82) and adjusted to an appropriate volume by using the volume UP / DOWN key (83).

Pressing the power key again (85) turns the monitor off and the channel number shown on the 2-way terminal display disappears.

As described above, according to the present invention, the following services can be provided.

1. Retransmission of Public and Satellite Broadcasting: By retransmitting public broadcasting broadcasted in Korea such as KBS1, KBS2, EBS, MBC, AFKN, SBS, and receiving and retransmitting satellite broadcasting broadcasted in Japan and Hong Kong, You can watch by selecting the channel.

2. In-house TV broadcasting: Records, edits and transmits news and promotional broadcasting, and sends out inquiry broadcasting or emergency broadcasting. The broadcasting may be a batch transmission method for collectively selecting and forcing a terminal, or a TV-type power control for CATV terminals and a group-specific transmission method for individually selecting and transmitting a video information source.

3. Reverse Broadcasting (Mobile Broadcasting): It transmits video information from each port of CATV transmission channel and broadcasts it to necessary group and terminal or record it in editing room.

4. Text Broadcasting: In-house sympathy guidance, event information can be broadcasted.

5. Status Check: Checking the status of the equipment by automatically collecting data by checking the terminal status through each two-way data communication.

Claims (3)

An editing apparatus for producing, editing, and recording various programs, and for editing and transmitting programs using various special effects; A transmission device for distributing and transmitting public and satellite broadcasts received through a reception facility and a program produced by the editing device; A plurality of terminal apparatuses for selecting and viewing any broadcast among multichannel broadcasts transmitted from the transmitting device; And a control device for controlling the entire system by performing data communication with the devices. The apparatus of claim 1, wherein the editing apparatus comprises: a photographing apparatus for indoor and outdoor photographing; An illumination device for providing an appropriate illuminance when indoors or when photographing in a dark place; Apparatus for automatic editing and batch editing, Apparatus for accommodating source video source and producing special image program according to special effects, Apparatus for providing various images by special effects by processing digital signal, and Still image for broadcasting A screen editing device comprising a computer graphics device for graphically providing or generating subtitles of a screen; Used for recording and playing back broadcast programs, VTR with built-in DT function for providing high-quality video and editing still images, and VTR for recording and playing back broadcast programs. Recording device having a; A monitor device for motorizing an image before and after image transmission; It is used for audio mixer which can synthesize and transmit various voice signals, and adopt voice signal level according to the situation, cassette deck which provides reproduction and recording source of the tape and talk, interview or interview. And a voice device having a wireless microphone for transmitting wirelessly and a wireless microphone including a radio tuner and an antenna, and a speaker for monitoring various audio signals in the editing room. The apparatus of claim 1, wherein the transmitting apparatus comprises: a broadcast receiving apparatus for receiving public broadcasting and satellite broadcasting, and modulating the received high frequency signal into a baseband video signal; Modulator for converting baseband video signal into RF signal or modulating the video signal of the corresponding channel, Demodulator for converting RF signal to baseband video signal or demodulating the video signal of the corresponding channel, Distributing RF signal into multiple signals An RF converter having a divider for mixing, an RF mixer for mixing a plurality of modulated RF signals, and an RF modem for converting an RS-232C data signal into an RF signal or an RF signal into an RS-232C data signal; And a control device for monitoring the transmitted video signal and selecting a channel by controlling the RF signal and controlling the terminal.