CN101505406A - Video on demand method for cable TV network - Google Patents
Video on demand method for cable TV network Download PDFInfo
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- CN101505406A CN101505406A CNA2009100800434A CN200910080043A CN101505406A CN 101505406 A CN101505406 A CN 101505406A CN A2009100800434 A CNA2009100800434 A CN A2009100800434A CN 200910080043 A CN200910080043 A CN 200910080043A CN 101505406 A CN101505406 A CN 101505406A
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Abstract
The invention provides a method for video on demand (VOD) in a cable television network, which comprises the following steps that: a VOD management system receives a program-demanding request from a user and sends a VOD management instruction and a VOD authorization instruction to an appointed edge device according to the program-demanding request; the edge device sends the demanded contents and the VOD authorization instruction to a digital television terminal through the cable television network according to the received VOD management instruction and the VOD authorization instruction; and the digital television terminal plays the demanded contents according to the VOD authorization instruction. The method solves the problem that the prior cable television network cannot achieve VOD, thus the VOD based on the cable television network can be achieved.
Description
Technical field
The present invention relates to digital TV field, in particular to a kind of VOD method that is used for cable TV network.
Background technology
Along with next generation computer multimedia technology and rapid network development, and the listing of the implementation of high performance encoding video pictures standard of new generation and high-performance code/decoding integrated circuit chip, it is practical and ripe that Digital Television is progressively moved towards.The most attractive part of Digital Television, not only be its picture and the quality height of sound, and mainly also be it will expand to towards the television transmission mode of broadcast type can with on-demand video transmission (Video on Demand, the VOD) mode of customer interaction.VOD is the abbreviation of video on demand techniques, be also referred to as the interactive television VOD system, promptly play corresponding video frequency program, fundamentally changed the deficiency that user's past passive formula is seen TV according to user's needs, thus the user can be at any time directly program request wish the content of watching.
In existing VOD system based on cable TV network, be by VOD server and IPQAM digital modulator as edge device, receive order request, and be the data content of user's play-on-demand according to order request from the user.
In realizing process of the present invention, the inventor finds that existing VOD system need make up duplex channel and realize the VOD program request between edge device and digital TV terminal, and present domestic major part is finished the television network broadcast of Digital Television transformation and is all belonged to unilateral network, therefore, existing cable TV network can't be realized the VOD program request.
Summary of the invention
The present invention aims to provide a kind of VOD method that is used for cable TV network, can solve the problem that existing cable TV network can't be realized the VOD program request.
In an embodiment of the present invention, provide a kind of VOD method that is used for cable TV network, having comprised: the VOD management system receives the order request from the user, and sends VOD supervisory instruction and VOD authorized order according to order request to designated edge equipment; Edge device is according to the VOD supervisory instruction and the VOD authorized order that receive, and the passage by cable TV network sends to digital TV terminal with the content and the VOD authorized order of program request; Digital TV terminal is according to the content of VOD authorized order play-on-demand.
Preferably, in above-mentioned VOD method, the passage between edge device and the digital TV terminal is a half-duplex channel.
Preferably, in above-mentioned VOD method, the VOD management system receives the order request from the user, and comprises to designated edge equipment transmission VOD supervisory instruction and VOD authorized order according to order request: the VOD management system is by the order request of common exchanging telephone network PSTN reception from the user; Perhaps the VOD management system is by the order request of Internet reception in internet from the user; Perhaps the VOD management system is by the order request of mobile communications network reception from the user.
Preferably, in above-mentioned VOD method, the VOD management system have following one of at least: common exchanging telephone network PSTN interface, TCP/IP interface and mobile communications network interface.
Preferably, in above-mentioned VOD method, edge device is according to the VOD supervisory instruction and the VOD authorized order that receive, passage by cable TV network sends to digital TV terminal with the content of program request and VOD authorized order and specifically comprises: edge device is according to the VOD supervisory instruction and the VOD authorized order that receive, content and VOD authorized order to program request are modulated, and the signal after will modulating sends to frequency mixer; Signal after the modulation that frequency mixer will receive and cable TV network signal carry out mixing, and the passage of the signal after the mixing by cable TV network sent to digital TV terminal.
Preferably, in above-mentioned VOD method, digital TV terminal specifically comprises according to the content of VOD authorized order play-on-demand: the digital TV terminal demodulate reception to mixing after signal in modulation after signal, obtain the content of VOD authorized order and program request; Content according to VOD authorized order play-on-demand.
Preferably, in above-mentioned VOD method, edge device is the MIPQAM digital modulator with storage medium, and modulation is the QAM modulation, the content of MIPQAM digital modulator storage program request.
Preferably, in above-mentioned VOD method, the content of the program request of VOD management system management MIPQAM digital modulator storage, management comprises the content of the program request of upgrading the storage of MIPQAM digital modulator.
Preferably, in above-mentioned VOD method, the VOD supervisory instruction comprises the PID of the content of ID number of the MIPQAM digital modulator of reception, the frequency of the content of reproduction time, play-on-demand and program request; The VOD authorized order comprises the PID, the number of times of watching duration, watching of content of frequency, program request of content of key, reproduction time, the play-on-demand of decrypting ciphertext content.
Preferably, in above-mentioned VOD method, the MIPQAM digital modulator is by the IP data of an IP mouth input VOD supervisory instruction and the formation of VOD authorized order, by the content of a plurality of QAM mouths output program requests and the modulation signal of VOD authorized order formation.
Preferably, in above-mentioned VOD method, the MIPQAM digital modulator is taken from the content of its storage, the content of importing when perhaps taking from from the IP cause for gossip from the content of QAM mouth output program request.
Preferably, in above-mentioned VOD method, the content of program request is to send to designated edge equipment by the VOD management system.
Preferably, in above-mentioned VOD method, also comprise: the VOD management system is to edge device transmit status query statement; Edge device response status query statement.
Preferably, in above-mentioned VOD method, the content of program request comprises following at least a: plaintext program, ciphertext program, clear data, encrypt data.
Because by receive order request by the VOD management system from the user, by VOD management system scheduling edge device the program of the program request passage by existing cable TV network being sent to digital TV terminal again plays, solved existing cable TV network and can't realize the problem of VOD program request, thereby can realize video request program based on cable TV network.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart according to the VOD method that is used for cable TV network of the embodiment of the invention;
Fig. 2 shows the VOD system schematic of the VOD method that is used for cable TV network according to the preferred embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the flow chart according to the VOD method that is used for cable TV network of the embodiment of the invention, comprising:
Step S10, the VOD management system receives the order request from the user, and sends VOD supervisory instruction and VOD authorized order according to order request to designated edge equipment;
Step S20, edge device be according to the VOD supervisory instruction and the VOD authorized order that receive, and the passage by cable TV network sends to digital TV terminal with the content and the VOD authorized order of program request;
Step S30, digital TV terminal is according to the content of VOD authorized order play-on-demand.
The preferred embodiment is by being received the order request from the user by the VOD management system, by VOD management system scheduling edge device the program of the program request passage by existing cable TV network is sent to digital TV terminal again and play, solved the problem that existing cable TV network can't be realized the VOD program request.VOD method among use the present invention can be realized the video request program based on cable TV network.
Preferably, in above-mentioned method, the passage between edge device and the digital TV terminal is a half-duplex channel.All belong to unilateral network because present domestic major part is finished the television network broadcast of Digital Television transformation, the method among the present invention can utilize the port line of existing wired TV network to send the content of program request to digital TV terminal.
Preferably, in above-mentioned method, step S10 comprises: the VOD management system is by the order request of common exchanging telephone network PSTN reception from the user; Perhaps the VOD management system is by the order request of Internet reception in internet from the user; Perhaps the VOD management system is by the order request of mobile communications network reception from the user.
The preferred embodiment provides the specific embodiments of VOD management system reception from user's order request.Method among the present invention utilizes the VOD management system to receive user's order request by PSTN, Internet or mobile communications network, the user can use the mode program request of landline telephone by making a phone call, use mobile phone by the mode program request of making a phone call or sending short messages or use PC by online login related web site the mode program request or pass through to the mode program request of the business hall of relevant operator.Obviously, the user can also order program by bi-directional set-top box.
The user carries out VOD point sowing time, needs to import/select the title or the numbering of the VOD program of the program request of wanting.In addition, the user can as with phone number or base number and digital TV terminal binding, then by making a phone call or send short messages a sowing time, directly just can be known the information of the digital TV terminal of program receiving by binding according to telephone number; If by Internet program request on the PC (situation of unbundling), then also need input the information of the unique identification digital TV terminals such as IC-card number of user name or digital TV terminal set-top box.
Preferably, in above-mentioned method, the VOD management system have following one of at least: common exchanging telephone network PSTN interface, TCP/IP interface and mobile communications network interface.Like this, can realize receiving user's order request by PSTN, Internet, mobile communications network by these interfaces.
Preferably, step S20 specifically comprises: edge device the content and the VOD authorized order of program request are modulated, and the signal after will modulating sends to frequency mixer according to the VOD supervisory instruction and the VOD authorized order that receive; Signal after the modulation that frequency mixer will receive and cable TV network signal carry out mixing, and the passage of the signal after the mixing by cable TV network sent to digital TV terminal.
The preferred embodiment provides edge device to play the specific embodiments of VOD program to digital TV terminal.Because the programme content of storage is digital,, send to digital TV terminal by existing catv line so become analog signal by modulation conversion.
The MIPQAM digital modulator receives instruction back and broadcasts and comprise immediately the broadcast of playing, delay time the opportunity of corresponding VOD program, and the mode that the signal of MIPQAM digital modulator after with mixing is transferred to digital TV terminal comprises broadcasting, multicast, clean culture.
Preferably, step S30 specifically comprises: the digital TV terminal demodulate reception to mixing after signal in modulation after signal, obtain the content of VOD authorized order and program request; Content according to VOD authorized order play-on-demand.
The preferred embodiment provides the specific embodiments of the program of digital TV terminal play-on-demand.The set-top box of digital TV terminal is carried out demodulation to it after receiving modulation signal, plays after analog signal is changed into digital signal.
Preferably, in above-mentioned method, edge device is the MIPQAM digital modulator with storage medium, and modulation is the QAM modulation, and the MIPQAM digital modulator is stored the content of above-mentioned program request.
The MIPQAM digital modulator is the equipment of an IP mouth input, several QAM mouth outputs, wherein M (Memory) expression storage, and IP represents the input of IP mouth, QAM represents modulation system.The VOD programme content of storing in the MIPQAM digital modulator can be that the VOD management system is pushed, VOD management system come according to user's order request real time propelling movement, also can be that the staff stores, change its hard disk and obtain.
In this preferred embodiment, the MIPQAM digital modulator is the programme content of local storage according to the VOD supervisory instruction of VOD management system transmission and the on-demand content of VOD authorized order modulation.Like this, can save the network bandwidth, avoid network congestion.
Preferably, in above-mentioned method, the content of the program request of VOD management system management MIPQAM digital modulator storage, management comprises the content of the program request of upgrading the storage of MIPQAM digital modulator.
The VOD management system is in charge of the program source of MIPQAM digital modulator, comprises pushing VOD program that the VOD program stores in MIPQAM digital modulator, the deletion MIPQAM digital modulator etc.The MIPQAM digital modulator is not initiatively wanted program to the VOD management system, but the program that passive reception VOD management system is given.
The edge device of appointment is meant the MIPQAM digital modulator in the digital TV terminal region of the content that receives program request.The VOD management system only MIPQAM digital modulator (can be a plurality of) in the digital TV terminal region of program receiving is sent supervisory instruction and the authorized order of playing the VOD program.
The user who in VOD management system and MIPQAM digital modulator, stores can program request the VOD program comprise clear content, ciphertext content.Needs according to operator determine whether the program encryption to VOD.The content of program request can be video frequency program or information data, as the information data of being made up of literal, symbol etc. of notice and so on.
Preferably, in above-mentioned method, the VOD supervisory instruction comprises the PID of the content of ID number of the MIPQAM digital modulator of reception, the frequency of the content of reproduction time, play-on-demand and program request; The VOD authorized order comprises the PID, the number of times of watching duration, watching of content of frequency, program request of content of key, reproduction time, the play-on-demand of decrypting ciphertext content.
Wherein, the key of decrypting ciphertext content (being designated as K1) also is through having encrypted, and its encryption key is designated as K2 (receiving the key that the digital TV terminal of the content of this program request is equipped with, each digital TV terminal unique corresponding key).When the content of user's program request is the ciphertext content, the authorized order of the K1 that the VOD management system will comprise encrypted sends to the MIPQAM digital modulator of appointment, digital modulator sends to digital TV terminal with the content of authorized order and program request again, digital TV terminal receive the back utilize in the IC-card have set-top box or exist in the set-top box or have key K 2 deciphering K1 in the digital TV terminal, use K1 decrypting ciphertext content again, thereby play this content.
Preferably, in above-mentioned VOD method, the MIPQAM digital modulator is by the IP data of an IP mouth input VOD supervisory instruction and the formation of VOD authorized order, by the content of a plurality of QAM mouths output program requests and the modulation signal of VOD authorized order formation.The MIPQAM digital modulator just can be supported a plurality of user terminals simultaneously like this.
Preferably, in above-mentioned VOD method, the MIPQAM digital modulator is taken from the content of its storage, the content of importing when perhaps taking from from the IP cause for gossip from the content of QAM mouth output program request.So both can carry out professional program request, thereby reduce network traffics with the program of preserving.And if when not preserving this request program, also support to transmit in real time.
Preferably, in above-mentioned method, the content of program request is that the VOD management system sends to designated edge equipment.
The preferred embodiment provides realization to be used for the another embodiment of the video request program of cable TV network.Under the enough big situation of the network bandwidth, the VOD management system is after receiving user's order request, except the edge device to appointment sends VOD supervisory instruction and the VOD authorized order, also send the content of the program of user's program request in real time, by edge device the content of this program request and VOD supervisory instruction are sent to digital TV terminal again and play.
The VOD management system comprises memory, the VOD program that all users of memory stores can program request etc., and the VOD management system is managed these VOD programs, and management comprises increases, deletion, modification and inquires about.The VOD management system pushes the VOD program to edge device and can send in real time according to user's order request, also can not timing push any VOD program.
Preferably, in above-mentioned method, also comprise: the VOD management system is to edge device transmit status query statement; Edge device response status query statement.
Thereby the VOD management system is by knowing the state of every MIPQAM digital modulator to MIPQAM digital modulator transmit status query statement, programme information of free time, in progress program, storage etc. as whether.After receiving user's order request, in the zone at the digital TV terminal place that scheduling receives suitable (as idle, play the VOD program of user's program request) the MIPQAM digital modulator comes broadcast program to give digital TV terminal.
ID number of the MIPQAM digital TV terminal (be above-mentioned suitable MIPQAM digital modulator) of VOD management system by comprising reception in the VOD supervisory instruction is identified at the MIPQAM digital modulator of responsible this content of broadcast in a plurality of MIPQAM digital modulators in the zone at digital TV terminal place of the content that receives program request.
Preferably, in above-mentioned VOD method, the content of program request comprises following at least a: plaintext program, ciphertext program, clear data, encrypt data.By support, thereby realize satisfying to various user's requests to various data.
Fig. 2 shows the VOD system schematic of the VOD method that is used for cable TV network according to the preferred embodiment of the invention.In the preferred embodiment, adopt the mode of general headend and sub-headend two-stage to realize the VOD program request.Place a cover VOD management system at the general headend place, mainly be in charge of the program source of each sub-headend, dispatch each sub-headend MIPQAM output VOD programme signal; Place some MIPQAM at sub-headend, the VOD programme signal of being responsible for storage compartment VOD program and modulating to user's output, a sub-headend is responsible for a panel region.
The user passes through phone, after the mode request programs such as Internet network, the VOD management system of general headend is sent the VOD supervisory instruction and the VOD authorized order of the VOD program of playing user's program request to the MIPQAM in the sub-headend of user region by broadband VPN network, after the appointment MIPQAM of sub-headend receives instruction, VOD program and VOD authorized order to this program request are modulated broadcast, and the VOD signal after will modulating send to frequency mixer with the signal mixing of cable TV network to, circuit by existing cable TV is transferred to the user, to satisfy user's order request.Wherein, frequency mixer is transferred to different users with its output signal by the distributor distribution.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
By receive order request by the VOD management system from the user, by VOD management system scheduling edge device the program of the program request passage by existing cable TV network is sent to digital TV terminal again and play, solved the problem that existing cable TV network can't be realized the VOD program request.VOD method among use the present invention can be realized the video request program based on cable TV network.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a VOD method that is used for cable TV network is characterized in that, comprising:
The VOD management system receives the order request from the user, and sends VOD supervisory instruction and VOD authorized order according to described order request to designated edge equipment;
Described edge device is according to the VOD supervisory instruction and the VOD authorized order that receive, and the passage by cable TV network sends to digital TV terminal with the content and the described VOD authorized order of program request;
Described digital TV terminal is play the content of described program request according to described VOD authorized order.
2. VOD method according to claim 1 is characterized in that, the passage between described edge device and the described digital TV terminal is a half-duplex channel.
3. VOD method according to claim 1 is characterized in that, the VOD management system receives the order request from the user, and comprises to designated edge equipment transmission VOD supervisory instruction and VOD authorized order according to described order request:
The VOD management system is by the order request of common exchanging telephone network PSTN reception from the user; Perhaps
The VOD management system is by the order request of Internet reception in internet from the user; Perhaps
The VOD management system is by the order request of mobile communications network reception from the user.
4. VOD method according to claim 3 is characterized in that, described VOD management system have following one of at least: common exchanging telephone network PSTN interface, TCP/IP interface and mobile communications network interface.
5. VOD method according to claim 1, it is characterized in that, described edge device is according to the VOD supervisory instruction and the VOD authorized order that receive, and the passage by cable TV network sends to digital TV terminal with the content of program request and described VOD authorized order and specifically comprises:
Described edge device the content and the described VOD authorized order of program request are modulated, and the signal after will modulating sends to frequency mixer according to the VOD supervisory instruction and the VOD authorized order that receive;
Signal and cable TV network signal after the described modulation that described frequency mixer will receive carry out mixing, and the passage of the signal after the mixing by cable TV network sent to digital TV terminal.
6. VOD method according to claim 1 is characterized in that, the content that described digital TV terminal is play described program request according to described VOD authorized order specifically comprises:
Described digital TV terminal demodulate reception to described mixing after signal in described modulation after signal, obtain the content of described VOD authorized order and described program request;
Play the content of described program request according to described VOD authorized order.
7. VOD method according to claim 1 is characterized in that, described edge device is the MIPQAM digital modulator with storage medium, and described modulation is the QAM modulation, and described MIPQAM digital modulator is stored the content of described program request.
8. VOD method according to claim 7 is characterized in that, described VOD management system is managed the content of the program request of described MIPQAM digital modulator storage, and described management comprises the content of the program request of upgrading the storage of MIPQAM digital modulator.
9. VOD method according to claim 8 is characterized in that, described VOD supervisory instruction comprises the PID of the content of ID number of the MIPQAM digital modulator of reception, the frequency of the content of reproduction time, play-on-demand and program request; Described VOD authorized order comprises the PID, the number of times of watching duration, watching of content of frequency, the program request of the content of the key of deciphering described ciphertext content, reproduction time, play-on-demand.
10. VOD method according to claim 7, it is characterized in that described MIPQAM digital modulator is imported IP data that described VOD supervisory instruction and VOD authorized order form, exported the content of described program request and the modulation signal that described VOD authorized order forms by a plurality of QAM mouths by an IP mouth.
11. VOD method according to claim 10 is characterized in that, the content that described MIPQAM digital modulator is exported described program request from described QAM mouth is taken from the content of its storage, the content of importing when perhaps taking from from described IP cause for gossip.
12. VOD method according to claim 1 is characterized in that, the content of described program request is to send to described designated edge equipment by described VOD management system.
13. VOD method according to claim 1 is characterized in that, also comprises:
Described VOD management system is to described edge device transmit status query statement;
Described edge device is replied described status poll instruction.
14. VOD method according to claim 1 is characterized in that, the content of described program request comprises following at least a: plaintext program, ciphertext program, clear data, encrypt data.
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| CNA2009100800434A CN101505406A (en) | 2009-03-17 | 2009-03-17 | Video on demand method for cable TV network |
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| CNA2009100800434A CN101505406A (en) | 2009-03-17 | 2009-03-17 | Video on demand method for cable TV network |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158744A (en) * | 2011-01-20 | 2011-08-17 | 深圳市同洲电子股份有限公司 | Order programme method, device and system |
| CN102387406A (en) * | 2011-12-27 | 2012-03-21 | 山东泰信电子有限公司 | Program on-demand system and method based on one-way set top box |
| CN102480645A (en) * | 2010-11-30 | 2012-05-30 | 深圳市同洲软件有限公司 | Cabled digital television system and method adopting wireless terminal to realize data interaction |
| CN102480635A (en) * | 2010-11-30 | 2012-05-30 | 深圳市同洲软件有限公司 | Cabled digital television system and method adopting wireless terminal to perform data interaction |
| CN104168504A (en) * | 2014-08-01 | 2014-11-26 | 北京数码视讯科技股份有限公司 | Digital television program switchover method and device |
-
2009
- 2009-03-17 CN CNA2009100800434A patent/CN101505406A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480645A (en) * | 2010-11-30 | 2012-05-30 | 深圳市同洲软件有限公司 | Cabled digital television system and method adopting wireless terminal to realize data interaction |
| CN102480635A (en) * | 2010-11-30 | 2012-05-30 | 深圳市同洲软件有限公司 | Cabled digital television system and method adopting wireless terminal to perform data interaction |
| WO2012071839A1 (en) * | 2010-11-30 | 2012-06-07 | 深圳市同洲软件有限公司 | Cable digital television system and method for performing data exchange via wireless terminal |
| CN102158744A (en) * | 2011-01-20 | 2011-08-17 | 深圳市同洲电子股份有限公司 | Order programme method, device and system |
| CN102387406A (en) * | 2011-12-27 | 2012-03-21 | 山东泰信电子有限公司 | Program on-demand system and method based on one-way set top box |
| CN102387406B (en) * | 2011-12-27 | 2014-06-25 | 山东泰信电子股份有限公司 | Program on-demand system and method based on one-way set top box |
| CN104168504A (en) * | 2014-08-01 | 2014-11-26 | 北京数码视讯科技股份有限公司 | Digital television program switchover method and device |
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Application publication date: 20090812 |