KR20020009737A - Satellite Internet Multi-point Digital Video Distribution System - Google Patents

Abstract

PURPOSE: A multipoint digital image distribution system using satellite Internet is provided to distribute high-quality large-capacity image data in the form of digital file without employing a separate storage device, and to minimize production cost and distribution cost. CONSTITUTION: A satellite Internet image data transmitting station(100) transmits digital image data to a satellite relay center(200) in multicast stream mode. The satellite relay center relays the digital image data to a local video televising business proprietor(303) including a satellite receiver(310). The local video televising business proprietor stores the received image data and image data management information in a VOD file server(320) and a VOD stream server(330), respectively. A customer of the video televising business proprietor selects and requests a specific video from the stream server. The requested video is read from the file server to be transmitted to display devices(410,420,440) in unicast mode.

Description

Satellite Internet Multi-point Digital Video Distribution System using Satellite Internet

The present invention relates to a multi-point digital video distribution system using the satellite Internet. More particularly, the present invention relates to a multicast method using satellite internet without storing a high-capacity digital video data using a specific video tape or CD-ROM. And a multi-point digital video distribution system using a unicast method using a base relay station such as a cable broadcasting station.

Background Art A conventional video distribution system uses a method of storing image data in a storage medium such as a video tape or a CD-ROM, and supplying the video data to a video rental store, a video retail store, a video room, a PC room, and the like. This method requires the use of a separate film, blank tape, CD-ROM, DVD, etc. for each image data, so if repeated use, the storage medium is damaged and the stored data is also damaged. Is holding.

In recent years, wired / wireless Internet broadcasting for exchanging text, voice, and image (graphic) data through a plurality of networks has been widely used as an alternative means of using the storage medium and data corruption. Wired Internet via PSTN (Public Switched Telephone Network) network has a problem that the transmission speed is very slow because, for example, communication between countries must pass through many communication networks. In particular, in the case of Internet broadcasting that transmits high-quality large-capacity data and video / audio data in real time, even if the streaming technology is used, it is very difficult to use the existing PSTN network.

As a method for solving the problem of lowering the transmission speed of large data in remote data communication, a method using a satellite communication system has been considered. In general, the satellite communication system has the advantage that the radio wave loss is reduced, so that a wider area service is possible with the same transmission power, and the point-to-point fixed communication has less fading due to the multipath.

The satellite communication system transmits the data sent from the satellite transmission system of the ground station through a satellite located at an altitude of about tens to hundreds of kilos on the surface of the earth, and each subscriber can receive it directly to the receiving antenna. Data sent from the satellite transmission system is composed of a packet stream, and the packet stream is carried on a satellite broadcasting carrier for transmission. The receiver receives via a satellite reception antenna, detects a packet stream carried on a carrier by a device such as a set-top box, and receives only predetermined channel data in the packet stream.

However, the image distribution system using the general satellite communication system described above has a problem that it is difficult to be used publicly because the burden is very economically because all the subscribers have to separately provide an expensive device such as a satellite reception antenna. In addition, since the service is provided mainly for one-way communication due to the characteristics of satellite broadcasting, each subscriber must have a satellite transmission system for two-way communication. This method, even if economically neglected, is hardly a choice in terms of the efficiency of data transmission and reception. As a result, there is a problem that the user can not use the unicast method to order the desired video data.

Accordingly, the present invention is to solve these problems, to provide a satellite Internet image data distribution system that allows the user to use the image data at an economical price without using a separate storage medium to distribute the image data The purpose is.

1 is a block diagram of a multi-point digital video distribution system using a satellite Internet illustrating a first embodiment of the present invention;

2 is a block diagram of a multi-point digital video distribution system using a satellite Internet according to a second embodiment of the present invention;

3 is a block diagram of a multi-point digital video distribution system using a satellite Internet according to a third embodiment of the present invention, and

4 is a block diagram of a multi-point digital video distribution system using a satellite Internet according to a fourth embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: satellite internet image data transmission station 110: multicast transmission server

120: video file server 130: video management DB

140: comprehensive customer management DB 200: satellite relay station

300: satellite internet image data repeater 301: regional cable stations

302: Internet Service Provider (ISP) 303: Video Broadcaster

304: apartment complex 310: satellite receiver

320: video file server on demand 330: video stream server on demand

340: customer management DB 400: video user

401: set-top box 410: digital projector

420: personal computer (PC) 430: MPEG decoder

440: analog (TV receiver, projector)

In order to achieve these objects, the multi-point digital image distribution system using the satellite Internet of the present invention, the satellite Internet image data transmitting station transmits the digital image data to the satellite relay station in a multicast stream method, the satellite relay station is a satellite receiving device Relays the digital image data to the satellite internet image data repeater, and the satellite satellite image data relay provider receives the received video data and the management information of the image data, respectively. Storing on the server; And a customer of a satellite internet image data relay company selects and requests a specific video from an on-demand video stream server, confirms whether or not to use the video for the requested customer, and sends the requested video to an on-demand video file server (VOD). And reading the data from the display device and sending the image data to the display device in a unicast manner.

In a multi-point digital video distribution system using satellite internet according to another embodiment of the present invention, a satellite internet video data transmitting station transmits digital video data to a satellite relay station in a multicast stream method, and the satellite relay station includes a satellite receiver. Relaying the digital video data to a regional video broadcasting company, and storing the received video data and management information of the video data in a video-on-demand file server and a video stream server, respectively; And requesting, by a customer of a video broadcasting service provider, selecting and requesting a specific video from a video streaming server on demand, and reading the requested video from a video file server on demand (VOD) and transmitting the video to the display device in a unicast manner. It is characterized by.

In a multi-point digital video distribution system using a satellite Internet according to another embodiment of the present invention, a satellite internet video data transmitting station transmits digital video data to a satellite relay station in a multicast stream method, and the satellite relay station uses a satellite receiver. It relays the digital video data to the Internet service provider (ISP), and stores the video data received by the Internet service provider (ISP) in the video file server (VOD) on demand and stores the member information of the video use in the customer management DB. Doing; And a member using a video object accesses the server of the Internet service provider (ISP), selects and requests a specific video object among the image data information of the server, compares the requested member information in the customer management DB, and checks whether the user is authenticated. And if the video use authentication is confirmed, the requested specific video data is read from the video-on-demand file server (VOD), and transmitted to the computer of the video request member through a transmission line in a unicast manner. do.

In a multi-point digital video distribution system using a satellite Internet according to another embodiment of the present invention, a satellite internet video data transmitting station transmits digital video stream data and video management data through a satellite relay station using a multicast stream method. Transmitting directly to a satellite Internet subscriber having a set top box including a; Storing image data and image management data received in a home-demand video file server (VOD) and an on-demand video stream server included in the set-top box, respectively; And the satellite internet subscriber selects desired video data from the on-demand video stream server of the set-top box, checks whether the channel is authenticated for the selected video data by the set-top box, and displays the selected video data if the channel is authenticated. Characterized in that it comprises a step shown in.

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

1 is a first embodiment of the present invention, comprising a satellite Internet image data transmitting station 100, a satellite relay station 200, a base satellite Internet image data relay 300, and a satellite Internet image data user 400 It is. The satellite internet image data transmitting station 100 includes an image file server 120 storing encoded image data digital data, an image management DB 130 storing image related information, and a comprehensive customer storing information of satellite internet customers. Satellite Internet multi to receive the image data and the image index information of the management DB 140, the image file server 120 and the image management DB 130 and transmits to the satellite relay station 200, such as satellite in the form of multicast stream data It is composed of a cast transmission server (110). Here, the comprehensive customer management DB (140) is used on-demand video service usage information that is made at each base relay 300 or the individual user 400 is periodically transmitted using the ground Internet network, the operation of the service for each base in the country It is to grasp the fact. The base satellite Internet image data relay 300 is a satellite Internet data receiver 310, an on-demand video file server 320 that stores the received video stream data, and an on-demand video stream server 330 that stores video management information ), And customer management DB. The satellite Internet image data user 300 includes at least one display device of a TV receiver 440 equipped with a digital projector 410, a personal computer 420, an MPEG1,2 decoder 430, or an analog projector 440. Doing.

The digital image distribution process of the system shown in FIG. 1 is performed as follows. First, the satellite internet image data transmitting station 100 manages image data such as title data, service target information, service period information, stream control information, and the like, for example, newly produced video data such as movies, performances, and music records. Digitally compresses data in MPEG1, 2, and transmits the data to the satellite relay station 200 in a multicast stream method, and the satellite relay station 200 is equipped with a satellite receiver 310. Relay the digital image data, and the base satellite Internet image data relay 300 is a satellite video data and video management data on demand video file server (VOD) 320 and video stream server on demand (330) Storing in; And the customer of the satellite Internet video data relay 300 selects and requests the desired specific video from the on-demand video stream server 330, and confirms the approval of the use of the video to the requested customer, if requested specific The video is read from the video-on-demand file server (VOD) 320 and transmitted to the display apparatuses 410, 420, and 440 in a real-time unicast stream method. In the above, instead of transmitting the image management data from the satellite internet image data transmitting station 100, the base satellite Internet image data relay 300 is produced on the basis of the received image data and stored in the on-demand video stream server 330 It is also possible to use.

In the above-described process of checking whether the on-demand video stream server 330 of the satellite internet image data relay company 300 approves the use of the request image of the customer 400 (during the same patent application), the customer 400 previously When a voice to use a video of a specific channel is expressed through a telephone or a terrestrial Internet to a satellite internet image data relay 300 or a satellite internet image data transmitting station 100, a channel approval code for each customer in the satellite internet image data transmitting station 100 They are transmitted to the on-demand video stream server 330 in a multicast manner, and stores and manages only the approval code of the corresponding customer among the channel approval codes for each customer. When a specific customer 400 requests a specific video to the on-demand video stream server 330 through a network or the Internet, the unicast stream method determines the presence or absence of approval code information of the corresponding customer to the on-demand video stream server 330. Will be used.

FIG. 2 illustrates a digital video distribution system in the case where the satellite internet video data relay 300 is a video room or PC room operator, and the satellite internet video data transmitting station 100 is a multicast stream system. The digital image data is transmitted to the satellite relay station 200, and the satellite relay station 200 relays the digital image data to the regional image broadcasting company 303 including the satellite receiver 310, and the regional image broadcasting company ( Step 303, storing the received image data and management information of the image data in the on-demand video file server (VOD) 320 and the on-demand video stream server 330, respectively; And the customer of the video broadcasting service provider 303 selects and requests a specific video from the video streaming server 330 on demand, and reads the requested video from the video file server (VOD) 320 on a unicast basis. Sending out to the devices 410, 420, 440.

The regional video broadcaster 303 is a video room or PC room service provider, and the video room or PC room is a central server, that is, a video receiver, a projector, a PC on demand video file server (VOD) 320 and a video stream server 330 on demand. The back is connected to the network, so the customer visits the video room or PC room and requests the desired video. At this time, the customer is made through the image management information stored in the video stream server on-demand 330, the customer does not check whether the approval of the use of the channel when the video request. Instead, the channel approval codes for each video broadcaster 303 are transmitted from the satellite internet image data transmitting station 100 in a multicast stream method, and the channel approval code corresponding to the video broadcaster 303 among the channel approval codes is approved. Only the code is stored, and only the image management information of the approved channel is stored in the on-demand video stream server 330 to be managed.

FIG. 3 illustrates a digital video distribution system in the case where the satellite internet image data broker 300, which is a third embodiment of the present invention, is an Internet service provider, that is, an ADSL telephone station, a cable Internet broadcasting station, and a multi-unit residential network. The video data transmitting station 100 transmits the digital video data to the satellite relay station 200 in a multicast stream method, and the satellite relay station 200 includes the satellite receiver 310 (ISP) 302. Relay the digital image data, and the Internet service provider (ISP) 302 stores the received image data in the on-demand image file server (VOD) 320, and stores the member information of the video use in the customer management DB (340). Storing; And an image use member 400 accesses the server 320 of the Internet service provider (ISP) 302, selects and requests a desired specific image from the image data information of the server, and requests the requested member information. Compared with the management DB (340) to check whether the user authentication, and if the use of video content authentication is confirmed by reading the requested specific video data from the video on demand video server (VOD) 320, the computer of the video request member through the transmission line Transmitting in a unicast manner.

The above-mentioned video distribution system is characterized in that Internet service providers for each region have a video-on-demand file server (VOD) 320 and video-on-demand stream server 330 for each region, and transmit video content through a multicast stream via satellite. It's a way to serve your customers over the Internet. This method is different from the general method of receiving video data through the Internet, so it can receive video data through the shortest route (network) that provides its own Internet service in the customer's region. There are advantages to it. In particular, a multi-family housing network, such as an apartment complex, has a satellite receiver 310, an on-demand video file server (VOD) 320, and an on-demand video stream server 330. In this case, it is very economical to receive high quality video data through satellite internet.

4 is a video distribution system for a satellite Internet subscriber 400 having a set-top box 401, which is a fourth embodiment of the present invention. Image management data such as title information, service target information, service period information, stream control information, and the like, through the satellite relay station 200, the satellite relay station 200 includes a set-top box including a data receiver 310. Transmitting directly to a satellite internet subscriber 400 having a 401; Title information, service target information, service period information, stream control for video data and video data received by the home on demand video file server (VOD) 320 and the on-demand video stream server 330 included in the set-top box 401. Storing image management data such as information, respectively; And the satellite internet subscriber 400 selects specific video data desired from the on-demand video stream server 330 of the set-top box 401, and checks whether channel authentication is performed on the specific video data selected by the set-top box 401. In the case of an authenticated channel, the selected image data is displayed on the display apparatuses 410, 420, and 440.

In addition, the satellite relay station 200 relays the digital image data to the set-top box 401 of the satellite Internet subscriber 400 via the one-way cable of the cable broadcasting station via the cable broadcasting station having the data satellite receiver 310. In addition, the satellite internet subscriber 400 may request authentication of a desired channel by return linking to the satellite internet image data transmitting station 100 by using a communication device such as a telephone, a terrestrial internet, a portable terminal, or the like.

In the channel authentication method of the customer 400, the satellite Internet image data transmitting station 100 transmits the channel authentication codes for each subscriber to the set-top box 401 of each subscriber, as in the first to third embodiments. By storing only the subscriber channel authentication code corresponding to the set-top box unique number among the channel authentication codes for each subscriber, if the customer selects a specific video, it is determined by checking the presence of the channel authentication code of the subscriber for the video.

While the present invention has been described with reference to specific embodiments, the above disclosure of the invention is not limited to the specific embodiments as merely preferred embodiments of the present invention. In addition, it will be readily understood by those skilled in the art that various modifications and changes can be made without departing from the spirit or scope of the invention as set forth in the claims below.

As described above, according to the present invention, since the video material is distributed in the form of a digital file, there is no additional manufacturing cost, and the distribution cost and time cost can be minimized because the same digital video is simultaneously distributed to branches throughout the country. In addition, there is no risk of illegal copying or modification of the copyrighted work generated by the end-users because the video is provided in the form of video service on demand to the end consumer. It can provide improved video and sound compared to CD-ROM titles.

Claims (8)

In the multi-point digital image distribution system using satellite internet, Satellite Internet image data transmitting station 100 transmits digital image data to the satellite relay station 200 in a multicast stream method, and the satellite relay station 200 is equipped with a satellite receiver 310 Relays the digital image data to the contractor 300, and the base satellite Internet image data broker 300 transmits the received image data and the management information of the image data to the on-demand video file server (VOD) 320 and the on-demand video stream server, respectively. Storing at 330; And The customer of the satellite Internet image data relay 300 to select the desired specific video from the on-demand video stream server 330 to request, confirm the approval of the use of the video to the requested customer, and request the specific video on demand Multi-point digital image distribution system using the satellite Internet comprising the step of reading from the file server (VOD) 320 and sending it to the display device (410, 420, 440) in a unicast manner. According to claim 1, wherein the satellite Internet image data relay 300 is further provided with a customer management DB (340) for storing customer information, the customer management DB and satellite Internet image data transmitting station 100 is connected to the Internet Multi-point digital video distribution system using satellite Internet, characterized in that the transmission and reception of data with each other. In the multi-point digital image distribution system using satellite internet, Satellite Internet image data transmitting station 100 transmits the digital image data to the satellite relay station 200 in a multicast stream method, the satellite relay station 200 is a regional image broadcasting company 303 including a satellite receiver (310) Relaying the digital video data to the video streaming service provider 303, and storing the received video data and management information of the video data in the on-demand video file server (VOD) 320 and the on-demand video stream server 330, respectively. ; And The customer of the video broadcasting service provider 303 selects and requests a specific video from the on-demand video stream server 330, and reads the requested video from the video file server (VOD) 320 on a unicast basis. Multi-point digital image distribution system using the satellite Internet comprising the step of transmitting to (410, 420, 440). 4. The broadcasting service provider 303 is a video room or a PC room service provider, and transmits the channel authorization codes for each video broadcasting service provider 303 from the satellite Internet video data transmission station 100 in a multicast stream method. , Multi-point digital image distribution system using the satellite Internet, characterized in that only the channel approval code corresponding to the video broadcast company (303) of the channel approval codes are stored. In the multi-point digital image distribution system using satellite internet, The satellite Internet image data transmitting station 100 transmits the digital image data to the satellite relay station 200 in a multicast stream method, and the satellite relay station 200 is provided with the satellite receiving apparatus 310 (ISP). The digital image data is relayed to 302, and the Internet service provider (ISP) 302 stores the received image data in an on-demand image file server (VOD) 320, and stores the member information using the customer management DB (340). Storing at); And The member 400 using the video object connects to the server 320 of the ISP 302, selects and requests a desired video image from the image data information of the server, and manages the requested member information. DB 340 checks whether or not to use the authentication, and if the video use authentication is confirmed, the requested specific video data is read from the on-demand video file server (VOD) 320, the video request member computer through the transmission line Multi-point digital video distribution system using the satellite Internet including transmitting in a unicast manner. 6. The multi-point digital video distribution system of claim 5, wherein the Internet service provider (ISP) is any one of a regional ADSL telephone station, a regional cable internet broadcasting station, and a multi-unit residential network. In the multi-point digital image distribution system using satellite internet, The satellite internet image data transmitting station 100 has a set-top box 401 including a satellite data receiving apparatus 310 through the satellite relay station 200 to transmit digital image stream data and image management data in a multicast stream method. Transmitting directly to an internet subscriber 400; Storing image data and image management data received in a home-demand video file server (VOD) 320 and a video stream server 330 included in the set-top box 401, respectively; And The satellite internet subscriber 400 selects the desired video data from the on-demand video stream server 330 of the set-top box 401, checks whether the channel authentication is performed on the specific video data selected by the set-top box 401, Multi-point digital image distribution system using the satellite Internet comprising the step of displaying the selected image data on the display device (410, 420, 440) in the case of an authorized channel. The method of claim 7, wherein The satellite relay station 200 relays the digital image data to the set-top box 401 of the satellite Internet subscriber 400 through the one-way cable of the cable broadcasting station via the cable broadcasting station having the data satellite receiving device 310, Satellite Internet subscriber 400 is a multi-point digital video distribution system using the satellite Internet, characterized in that the return link to the satellite Internet image data transmitting station 100 through a communication device.