CN1264976A - Data broadcast system of digital vedio broadcast - Google Patents
Data broadcast system of digital vedio broadcast Download PDFInfo
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- CN1264976A CN1264976A CN99100833A CN99100833A CN1264976A CN 1264976 A CN1264976 A CN 1264976A CN 99100833 A CN99100833 A CN 99100833A CN 99100833 A CN99100833 A CN 99100833A CN 1264976 A CN1264976 A CN 1264976A
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Abstract
A multimedia information communication technique for transmitting data over the digital vedio broadcast channel by means of the channel transmission technique for digital vedio broadcast is composed of Internet gateway, data broadcast server, multiplexer, orthogonal amplitude modulator, remote access servera nd user terminals. It can provide multifunctional services over cable TV network.
Description
The invention belongs to the multi-media information communication technical field.Relate in particular to the broadcast system of digital video broadcasting.
At present some occur and be used for the Radio Data System of cable TV network.For example, the Radio Data System of Tsing-Hua University's exploitation (seeing the propaganda materials " based on the outer interactive multimedia digital data broadcast system of CATV net " of Yongxin of Tsing-Hua University Information Technology Co. Ltd), several cable TVs were at home done transmission experiment on the net.Its downlink transfer has adopted the QPSK modulation technique, and the message transmission rate on the bandwidth (8M) of a pal mode is 10Mbps.The analog bandwidth of current cable 8MHz is divided into the subband of 4 2MHz, with data-modulated in the passband of 2MHz.Receiving terminal adopts computer card.But these systems adopt special data format and transmission means, and transmission speed is slow, and function singleness is unfavorable for carrying out multifunctional service and other network interconnection difficulties.
The objective of the invention is to propose a kind of Radio Data System of the digital video broadcasting of forming by internet (Internet) gateway, digital video broadcasting (DVB) broadcast data server, multiplexer, quadrature amplitude modulation (QAM) modulator and RAS, it is connected with the internet easily, the integrated digital video broadcast system, do not increase the burden of existing network, thereby solved the problem that prior art exists.
Basic thought of the present invention is, the information service front end is broadcast mass data in the circulation of DVB channel high speed, and the user selects to accept oneself needed data from these data.It is felt to be similar to and is using the browser access World Wide Web (WWW) on the internet.If the user needs the other guide beyond the loop-around data, can front end be delivered in request by telephone wire, come from the internet with required data retrieval by front end, from broadcast channel, broadcast away again.
Therefore, the technical solution adopted in the present invention is that it includes internet gateway, DVB broadcast data server, multiplexer, quadrature amplitude modulation (QAM) modulator and RAS and user terminal.Wherein:
The data broadcasting service front end is provided with internet gateway, DVB broadcast data server, multiplexer, quadrature amplitude modulation (QAM) modulator and RAS at its front end.Internet gateway links to each other by local area network (LAN) with DVB broadcast data server, RAS three, internet gateway links to each other with the internet simultaneously, it receives the user data requests of sending here by RAS, from the internet, fetch the needed data of user according to user's requirement, and give DVB broadcast data server by local area network (LAN) the data of fetching.After the DVB broadcast data server is received the data that internet gateway sends here, code stream call format according to digital video broadcasting (DVB), data are squeezed in the code stream of DVB, interface standard according to the transport stream (TS) of DVB regulation is given multiplexer (MUX) with data, multiplexer forms data code flow and the multiplexing back of other video/audio code stream the code stream of higher rate, speed can reach 20 to 40Mbps (megabit per seconds), this high-speeld code-flow is still given the modulator of quadrature amplitude modulator (QAM) or alternate manner according to the interface standard of the transport stream (TS) of DVB regulation, this modulator is modulated to analog radio frequency (RF) signal with data code flow and sends in the cable TV network and transmit.Have data broadcasting and accept in the subscriber computer top box access cable TV network of function the data code flow of broadcasting to be accepted to give household PC by network interface, household PC can be consulted data information by explorer; Perhaps set-top box is given built-in TV browser with data, consults data on television set.If the user needs other data of not broadcasting, can use the interior telephone modem (Modem) of set-top box request of data to be given the RAS of front end by public phone network.So just constituted a Radio Data System based on DVB.
The invention has the advantages that it meets the DVB standard, adopt TCP/IP (transmission control and the internetworking) agreement of Internet Standard, be connected with the internet easily, the compatible with DVB digital video broadcasting does not increase the burden of existing network, small investment, instant effect.
Fig. 1 is data flow architecture figure;
Fig. 2 is a system construction drawing;
Fig. 3 is index structure figure;
Fig. 4 is the set-top box structure chart;
Further specify preferred embodiment of the present invention in conjunction with above-mentioned each accompanying drawing now.
As shown in Figure 2, the present invention mainly includes internet (Internet) gateway 2, DVB broadcast data server 3, multiplexer 4, quadrature amplitude modulation (QAM) modulator 5 and RAS 6 and user terminal.At the data broadcasting service front end, internet (Internet) gateway 2, DVB broadcast data server 3, multiplexer 4, quadrature amplitude modulation (QAM) modulator 5 and RAS 6 are set.Internet gateway 2 links to each other by local area network (LAN) (10/100Mbps Ethernet) with DVB broadcast data server 3, RAS 6 threes, internet gateway 2 links to each other with internet 1 simultaneously, it receives the user data requests of sending here by RAS 6, from the internet, fetch the needed data of user according to user's requirement, and give DVB broadcast data server 3 by local area network (LAN) the data of fetching.After DVB broadcast data server 3 is received the data that internet gateway 2 sends here, code stream call format according to digital video broadcasting (DVB), data are squeezed in the code stream of DVB, interface standard according to the transport stream (TS) of DVB regulation is given multiplexer 4 (MUX) with data, multiplexer 4 forms data code flow and the multiplexing back of other video/audio code stream the code stream of higher rate, speed can reach 20 to 40Mbps (megabit per seconds), this high-speeld code-flow is still given the modulator of quadrature amplitude modulator 5 (QAM) or alternate manner according to the interface standard of the transport stream (TS) of DVB regulation, this modulator 5 is modulated to analog radio frequency (RF) signal with data code flow and sends into transmission in the cable TV network 7.Have data broadcasting and accept in the subscriber computer top box 9 access cable TV networks 7 of function the data code flow of broadcasting to be accepted to give household PC 11 by network interface, household PC 11 can be consulted data information by explorer; Perhaps set-top box 9 is given built-in TV browser 10 with data, consults data on television set.If the user needs other data of not broadcasting, can use set-top box 9 interior telephone modems (Modem) request of data to be given the RAS 6 of front end by public phone network 8.So just constituted a Radio Data System based on DVB.
In Fig. 2, utilize the DVB channel at cable TV online 7, the high-speed datacasting business is provided on unidirectional broadcast network, playing application can be one-way broadcast systems such as cable TV network.The information service front end is broadcast mass data in the circulation of DVB channel high speed, and the user selects to accept own needed data from these data.It is felt to be similar to and is using the browser access World Wide Web (WWW) on the internet.If the user needs the other guide beyond the loop-around data, can front end be delivered in request by telephone wire, come from the internet with required data retrieval by front end, from broadcast channel, broadcast away again.
As shown in Figure 1, with one piece of data tandem array loop play, as luggage on the conveyer belt of airport.The user can download each cycle of selecting that mostly is circulation blanking time most from wherein selecting own required part to receive.The time in cycle can be selected arbitrarily.For example: when transmission rate was 40Mbps, it was 5Gbyte (gigabyte) data that 1000 second time interval can be transmitted 40Gbit (lucky position).The user selects the data that oneself needs in the data of 5Gbyte, each stand-by period mostly is 17 minutes most.
In the middle of the initial sum of the data flow of broadcasting, insert the content retrieval catalogue several times, as shown in Figure 3.Can receive the content retrieval catalogue as early as possible after user's start, the user chooses required content by the content retrieval catalogue, and its stand-by period mostly is the cycle of circulation most.
The user uses the device of unifying with Digital Television DVB set-top box to receive data broadcasting.Only need suitably to increase the function of CPU (CPU) and the capacity of internal memory, other parts can be shared, and the cost increase seldom.As shown in Figure 4.Subscriber computer top box 9 comprises: modules such as network interface 13, channel-decoding 14, deciphering 15, demultiplexing 16, read-only memory 17, CPU 18, random access storage device 19, Ethernet unit 20, remote control unit 21, graphic element 22, A/V coding 23 are formed.Network interface 13 is link blocks of subscriber computer top box 9 and cable television network 7, finishes the function of tuning demodulation.Channel-decoding 14, deciphering 15 and demultiplexing 16 are used to handle the code stream information of DVB.Ethernet unit 20 is used for and being connected of household PC.
Claims (5)
1. the Radio Data System of a digital video broadcasting, it is characterized in that it includes: internet (Internet) gateway, DVB broadcast data server, multiplexer, quadrature amplitude modulation (QAM) modulator and RAS and user terminal, wherein;
Internet gateway, it links to each other with broadcast data server, RAS by local area network (LAN), and it also links to each other with the internet simultaneously;
Broadcast data server, the data that it is received from the internet, according to the code stream call format of data video broadcasting, the standard interface of the transport stream of DVB regulation sends data to multiplexer;
Multiplexer, it sends the code stream of data code flow and the multiplexing back formation of other video code flows two-forty to the modulator of quadrature amplitude modulator or alternate manner by the DVB specified standard;
Quadrature amplitude modulator, it is modulated to analog radio-frequency signal with data code flow and sends into cable TV network;
User terminal, it is connected with cable TV network.
2. by the described Radio Data System of claim 1, it is characterized in that said user terminal, it includes: modules such as network interface, channel-decoding, deciphering, demultiplexing, read-only memory, CPU, random access storage device, Ethernet unit, remote control unit, graphic element, A/V coding are formed.
3. by the described Radio Data System of claim 1, it is characterized in that said DVB broadcast data server, the data code flow periodic cycle that it produced, cycle period can be selected arbitrarily, and period of reservation of number is the longest to be cycle period.
4. by the described Radio Data System of claim 1, it is characterized in that said DVB broadcast data server, include catalog search information in the data code flow that it produced, the subscriber computer top box can be selected required information according to catalog search information from tell code stream.
5. by the described Radio Data System of claim 1, it is characterized in that described user terminal, the user uses the device of unifying with Digital Television DVB set-top box to receive data broadcasting, only needs suitably to increase the function of CPU and the capacity of internal memory, and other parts can be shared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99100833A CN1117453C (en) | 1999-02-24 | 1999-02-24 | Data broadcast system of digital vedio broadcast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99100833A CN1117453C (en) | 1999-02-24 | 1999-02-24 | Data broadcast system of digital vedio broadcast |
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| Publication Number | Publication Date |
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| CN1264976A true CN1264976A (en) | 2000-08-30 |
| CN1117453C CN1117453C (en) | 2003-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99100833A Expired - Fee Related CN1117453C (en) | 1999-02-24 | 1999-02-24 | Data broadcast system of digital vedio broadcast |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310507C (en) * | 2001-07-25 | 2007-04-11 | 汤姆森特许公司 | Digital video device for integration in network |
| CN100345438C (en) * | 2004-12-15 | 2007-10-24 | 中国科学院计算技术研究所 | Video server QAM modulation card facing HFC access |
| CN100388789C (en) * | 2004-02-12 | 2008-05-14 | 韩国电子通信研究院 | System and method for providing integrated communications and broadcasting service |
| WO2008083552A1 (en) * | 2007-01-11 | 2008-07-17 | Zte Corporation | Multiplex transmission interface method of electronic service guide |
| CN100426864C (en) * | 2004-05-09 | 2008-10-15 | 上海蓝信软件技术有限公司 | Method for increasing broadcast effect of data flow |
| CN100438514C (en) * | 2004-12-17 | 2008-11-26 | 深圳力合数字电视有限公司 | An information gateway and working method thereof |
| CN100448290C (en) * | 2001-10-02 | 2008-12-31 | 诺基亚公司 | Internet protocol address to packet identifier mapping |
| CN100466858C (en) * | 2006-05-10 | 2009-03-04 | 华为技术有限公司 | Wireless communication network expanding system and method |
| CN1906947B (en) * | 2004-01-06 | 2010-05-26 | 汤姆森许可贸易公司 | Method of transmitting digital services over a network and device implementing the method |
| CN101917325A (en) * | 2010-09-02 | 2010-12-15 | 杭州东方网和科技有限公司 | Heterogeneous network converged data exchange method |
| CN101406053B (en) * | 2006-01-19 | 2011-04-20 | Lg电子株式会社 | Method for transmitting and receiving tranffic information and apparatus thereof |
| CN101076993B (en) * | 2004-12-09 | 2011-07-13 | 汤姆森特许公司 | Method for finding and collecting service in lan and device for achieving this method |
| CN101527810B (en) * | 2008-12-31 | 2012-04-25 | 北京博威康技术有限公司 | Mqam multifunctional transmission system |
| CN101540897B (en) * | 2008-03-21 | 2013-04-24 | 中国科学院声学研究所 | Interactive television program stream time stamp issuing method for cable TV network |
| US11319566B2 (en) | 2017-04-14 | 2022-05-03 | Capsugel Belgium Nv | Process for making pullulan |
| US11576870B2 (en) | 2017-04-14 | 2023-02-14 | Capsugel Belgium Nv | Pullulan capsules |
-
1999
- 1999-02-24 CN CN99100833A patent/CN1117453C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310507C (en) * | 2001-07-25 | 2007-04-11 | 汤姆森特许公司 | Digital video device for integration in network |
| CN100448290C (en) * | 2001-10-02 | 2008-12-31 | 诺基亚公司 | Internet protocol address to packet identifier mapping |
| CN1906947B (en) * | 2004-01-06 | 2010-05-26 | 汤姆森许可贸易公司 | Method of transmitting digital services over a network and device implementing the method |
| CN100388789C (en) * | 2004-02-12 | 2008-05-14 | 韩国电子通信研究院 | System and method for providing integrated communications and broadcasting service |
| CN100426864C (en) * | 2004-05-09 | 2008-10-15 | 上海蓝信软件技术有限公司 | Method for increasing broadcast effect of data flow |
| CN101076993B (en) * | 2004-12-09 | 2011-07-13 | 汤姆森特许公司 | Method for finding and collecting service in lan and device for achieving this method |
| CN100345438C (en) * | 2004-12-15 | 2007-10-24 | 中国科学院计算技术研究所 | Video server QAM modulation card facing HFC access |
| CN100438514C (en) * | 2004-12-17 | 2008-11-26 | 深圳力合数字电视有限公司 | An information gateway and working method thereof |
| CN101406053B (en) * | 2006-01-19 | 2011-04-20 | Lg电子株式会社 | Method for transmitting and receiving tranffic information and apparatus thereof |
| CN100466858C (en) * | 2006-05-10 | 2009-03-04 | 华为技术有限公司 | Wireless communication network expanding system and method |
| WO2008083552A1 (en) * | 2007-01-11 | 2008-07-17 | Zte Corporation | Multiplex transmission interface method of electronic service guide |
| US8266650B2 (en) | 2007-01-11 | 2012-09-11 | Zte Corporation | Multiplex transmission interface method of electronic service guide |
| CN101540897B (en) * | 2008-03-21 | 2013-04-24 | 中国科学院声学研究所 | Interactive television program stream time stamp issuing method for cable TV network |
| CN101527810B (en) * | 2008-12-31 | 2012-04-25 | 北京博威康技术有限公司 | Mqam multifunctional transmission system |
| CN101917325A (en) * | 2010-09-02 | 2010-12-15 | 杭州东方网和科技有限公司 | Heterogeneous network converged data exchange method |
| CN101917325B (en) * | 2010-09-02 | 2012-11-14 | 杭州东方网和科技有限公司 | Heterogeneous network converged data exchange method |
| US11319566B2 (en) | 2017-04-14 | 2022-05-03 | Capsugel Belgium Nv | Process for making pullulan |
| US11576870B2 (en) | 2017-04-14 | 2023-02-14 | Capsugel Belgium Nv | Pullulan capsules |
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|---|---|
| CN1117453C (en) | 2003-08-06 |
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