CN1162000C - Wide band recording-reproducing system - Google Patents
Wide band recording-reproducing system Download PDFInfo
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- CN1162000C CN1162000C CNB011188758A CN01118875A CN1162000C CN 1162000 C CN1162000 C CN 1162000C CN B011188758 A CNB011188758 A CN B011188758A CN 01118875 A CN01118875 A CN 01118875A CN 1162000 C CN1162000 C CN 1162000C
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Abstract
The present invention provides a wide band recording and playing system. The present invention comprises a service side connected with a wide band network and a cable television network and a plurality of client sides connected with the wide band network, wherein the service side concretely comprises a task preprocessing module, a task monitoring module, a video compression module, a medium data base and a media flow control module, each of the client sides concretely comprises a video recording control module, a play control module and a video decompression and conversion module. The recording and the maintenance and the recording and the ordering of programs are respectively carried out at the service side and the client sides. In this way, resource utilization efficiency is high, system functions can be added easily, client end cost is lowered, and meanwhile, the present invention can provide convenient service for clients.
Description
Invention field
The present invention relates to a kind of recording and playback system of TV programme on the broadband networks basis that be based upon.
Background technology
Along with popularizing of the network communications technology and computer technology, intelligent dwelling sub-district with broadband network and cable TV network is more and more universal, how cable television network and broadband networks are organically combined, for the user provides comprehensive various effective service, network and cable resource are fully used, and are important topics of the information industry development.Existing VOD system (video on-demand system) can use broadband networks that the system of service is provided as the user, this system is made of the server end and the client that are connected on the broadband networks, the transmit control module that described client comprises, be used to receive control signal, and control signal passed to the media flow control system of service end by broadband networks; Video compression and modular converter are used for the media database receiving media data from service end, and packed data is reduced to analog signal is sent to television for play.The Media Stream control module that described service end comprises is used for sending media data or stopping to send media data to client to client according to control signal; Media database is used for storage, increases, deletes media data, and program contents upgrades in time.When using this VOD system on-demand program, the transmit control module of client transmits control signal to the Media Stream control module of service end, service end reads media data according to instruction from media database, send to the video compression and the modular converter of client by broadband networks, this module contracts the data decompression that receives and is converted to analog signal, is sent to television set.Adopt above-mentioned pattern, concerning the user, the VOD system is equivalent to a video walkman, and the program in the storehouse is increased or deletion by the keeper.The user can only the existing program of order program service end, and the user haves no right the management of media database, so the VOD system can not satisfy the demand of user's program recording.
Improved VOD system can directly use cable television network to provide service as the user.This system is made of service end and client, and their service end has just increased video recording control module, TV signal tuner module, video encoding module and local media database in client without any difference.Like this, client just can directly link to each other with cable television network with broadband networks, carries out recording of TV programme.The video recording control module receives and the processing controls instruction, when video state, TV signal is converted to digital video by " TV signal tuner ", digital video is by video encoding module boil down to media data, be stored on the local media database, client directly reads packed data according to the local program catalogue from local media database, it is reduced to analog signal is sent to television set.
From the above mentioned, though improved VOD system has expanded systemic-function, it has a lot of unreasonable parts at design aspect: the one, added video encoding module and media storage device in client, and increased the cost of client device.The 2nd, because playing programs belongs to the client transaction of front-end processing, performance recording belongs to the service end affairs of background job, this system client will be handled this a pair of concurrent event simultaneously, must rely on the powerful hardware device of performance, therefore can improve the client cost greatly.The 3rd, the function of system concentrates on the client of high degree of dispersion, safeguard very difficult, the upgrading of system and to revise almost be impossible.The 4th, do not make full use of the broadband networks resource, function is restricted, for example can't share recorded program, can't record many programs etc. simultaneously.The 5th, media storage device mostly is accurate device, and concussion, bump, power failure suddenly all can produce adverse consequences to it, therefore can make client not reach the due durability of household electrical appliance.The 6th, be subjected to the restriction in cost and space,
The capacity of media storage device can be very not big, and directly memory device is managed the complexity that can increase client operation by the user.
At the problems referred to above, the object of the present invention is to provide a kind of wide band recording-reproducing system, this system can make full use of broadband networks and cable television network resource, reduces the client cost, can provide service more easily for the user simultaneously.
Summary of the invention
For achieving the above object, wide band recording-reproducing system provided by the invention comprises: connect the service end of broadband networks and cable television network and be connected a plurality of clients of broadband networks.
Described service end, be used to manage the performance recording task that described client is sent, recording TV program and recorded program compressed storage as requested, provide listing to described client, the mission requirements that sends according to described client to program play, send, download, montage, deletion and recorded program derived, and provide the program data of compression and the Play Control of customer in response end during to the client playback to client at program;
Described service end comprises:
Media database is used to finish access, additions and deletions, the index operation of media data, and revises program contents automatically according to the media library content;
The Media Stream control module is used for receiving control command from client the media data flow between control client and the service end;
The task pretreatment module is used to set up network monitoring, monitors the record task that transmits from client, and described record task is carried out following processing: receiving of task is divided into groups by television channel number, and the task that all television channel number are identical is returned at one group; And each is organized the interior overlapped task of video time section organize interior merging;
The Mission Monitor module, be used for whenever checking record task and current task at interval through a regular time, for matured task, the notice video compressing module begins video recording, for having finished of task, the notice video compressing module stops video recording, and the program that records is added in the media database;
Video compressing module is used for receiving control command from the task monitoring modular, and the cable TV signal compression of specified channel is stored in the media database;
Described client, receive user's control command, and this instruction is sent to service end, according to the programme information that obtains from described service end, the interface of guides user operation is provided to the user, and when accepting the program of described service end playback, the packed data that described service end is transmitted decompresses;
Described client comprises:
Transmit control module is used to receive the Play Control signal that the user sends, and this signal is sent to the Media Stream control module of service end;
Video compression and modular converter, the program data that is used for that service end is sent carry out decompress(ion) and contract the data after decompressing are converted to the signal that playback equipment can be handled, and play then;
The video recording control module is used to receive the record task that the user sends, and described task is sent to the task pretreatment module of service end.
Described video recording control module further comprises:
Record submodule, be used for obtaining list of television programmes, and import the task of performance recording as the user after, user's task is sent to described service end from described service end;
The management submodule is used for obtaining recorded program table from described service end, the task that leading subscriber is assigned, and guide the user to recorded program play, send, download, montage and operation that recorded program is derived;
The playback controls module, be used in progress program stop, broadcast, time-out, F.F., fast reverse operation.
Owing to the present invention includes service end that connects broadband networks and cable television network and a plurality of clients that are connected broadband networks, described service end specifically comprises: task pretreatment module, Mission Monitor module, video compressing module, media database, Media Stream control module, described client specifically comprises: video recording control module, transmit control module, video compression and modular converter, like this, recording, safeguard all of program carried out in service end, and client only is used to control the recording of program, program request.Because the broadcast of program and be recorded in client and service end is carried out respectively, not only the level of resources utilization is higher, and the upgrading of client is convenient, control is flexible, be easy to reach the durability of household electrical appliances, systemic-function is increased, for example can share recorded program and record many programs simultaneously, so the present invention can make full use of broadband networks and cable television network resource, reduce the client cost, can provide service more easily for the user simultaneously.
Description of drawings
Fig. 1 is applied environment figure of the present invention;
Fig. 2 is a service end module example structure block diagram of the present invention;
Fig. 3 is a client modules example structure block diagram of the present invention;
Fig. 4 is the video compression apparatus fundamental diagram that is made of video compressing module.
Specific embodiment
At first with reference to figure 1, sub-district wired network 4 among the figure provides TV programme by tv programme sources 5 such as TV station 6 and satellites, client 2 of the present invention is connected with sub-district broadband networks 3, service end 1 of the present invention is connected with sub-district broadband networks 3, sub-district wired network 4, and client 2 is play at connected image playing device from the TV signal that service end 1 obtains after treatment by sub-district broadband networks 3.
Described service end 1, be used to manage the performance recording task that described client is sent, recording TV program and recorded program compressed storage as requested, provide listing to described client, the mission requirements that sends according to described client to program play, send, download, montage, deletion and with operations such as recorded program derivation, and provide the program data of compression and the Play Control of customer in response end during to the client playback to client at program;
Described client 2, receive user's control command, and this instruction is sent to service end, according to the programme information that obtains from described service end, the interface of guides user operation is provided to the user, and when accepting the program of described service end playback, the packed data that described service end is transmitted decompresses.
Fig. 2 is a service end module example structure block diagram of the present invention, and service end 1 shown in Figure 2 comprises:
Described task comprises: the Close Date of the Start Date of television channel number, recording task and time, recording task and time.The task pretreatment system carries out following processing to record task: in each group, task can the single-track link table mode be stored, and the value of the pointer of chained list tail item is empty (NULL).Each task groups is a list structure, and the first term address of all chained lists is left in the array of pointers, Mission Monitor system visit that can serviced end.When transmitting new video task from client, at first should judge the channel of this video task, determine task groups under this task according to described channel, if the channel list in the group be empty, directly with this task insertion task list, if be not empty, reexamine which task and new task and repeat,, directly insert new task in the formation by the time started order if do not repeat, if repetition is arranged, replace iterative task with the union of new task and iterative task.
Mission Monitor module 12, be used for whenever checking record task and current task at interval through a regular time, for matured task, the notice video compressing module begins video recording, for having finished of task, the notice video compressing module stops video recording, and the program that records is added in the media database.For this reason, this module will be created a current task tabulation, preserves the current task of being in recording state in the tabulation.In the reality, the Mission Monitor module is also set up a timing and is triggered message, in time interval of every mistake, as 1 second, just checks record task tabulation and current task tabulation according to present clock.If matured task is arranged, task monitoring system notice video compression apparatus begins video recording.If having finished of task is arranged, task monitoring system notice video compression apparatus stops video recording, and the program that records is added in the media database go.Concrete implementation procedure is as follows: the first step, set up a clocked flip-flop (Timer), and time interval of every mistake is triggered a timer message; Second step, set up the tabulation of current task, the list structure of current task tabulation is identical with the structure of record task tabulation, comprises television channel number, recording starting time with record concluding time 3 fields, data structure also can be a single-track link table.The current task tabulation can be arranged by video recording concluding time ascending order.The 3rd step, after the task monitoring modular is received timer message, read current system time, then, search video recording and be less than or equal to the task of current system time the time started in record task, the task monitoring modular is passed to video compressing module with the television channel number of this task, and the control of video compression module begins to record, simultaneously, this task will be moved to the current task tabulation from the record task tabulation.In the 4th step, after the task monitoring modular is received timer message, also to check the current task tabulation.In current task, search video recording and be less than or equal to the task of current system time the concluding time.The task monitoring system is passed to video compression apparatus to the television channel number of this task, and the control of video compression device stops to record.Simultaneously, the task monitoring system sends message to media database, and the notice media database adds the new program of this section.Then, the task monitoring system is with the deletion from the current task tabulation of this task.
TV signal tuner in the reality with driver a lot of program application interfaces (API) are provided.Therefore adjust the receive frequency of TV signal tuner by program, and specify a memory address, the TV signal tuner just can be separated the TV signal of appointment, is converted to stored digital signal in the internal memory of appointment.The driver of video encoder provides the application programming interfaces of relevant video compression.By providing the position of video data in internal memory, and the memory location of specified compression data, driver just can the control of video encoder with the mpeg format of digital video signal boil down to appointment, and be stored in the media database.
Because a video compressing module can only be supported recording of a cover TV programme.And general cable TV can provide the channel more than tens, therefore a sub-district needs a plurality of video compressing modules, if each video compressing module realized by a video compression card, the integrated circuit board array that just needs the polylith video compression card to form is finished the recording of TV programme of whole sub-district.Every integrated circuit board is responsible for recording the channel of an appointment, the corresponding one group of record task of each channel, an index value in the corresponding media database of each channel.With reference to figure 4.The integrated circuit board array that compression device among the figure is made up of the polylith video compression card is formed, each video compression card can be recorded the program of a channel, the corresponding video task list of each channel, according to the task in the task list, behind the television program record with response, store in the media database through overcompression.
Media Stream control module 15 is used for receiving control command from client the media data flow between control client and the service end.Concrete control operation may be:
(1) transmit control module of client sends control command to the Media Stream control module of service end, instruction comprises command code and program ID (sign), described command code may be the ID that operational order such as plays, suspend, stop, and described program code is the ID of media database content.
(2) Media Stream control module run duration is set up a broadcast program list, the information of preserving in progress program.The data structure of broadcast program list is a single-track link table, and following field is arranged: the IP of client (Internet protocol) address, in progress program ID, the current location of playing programs, current broadcast state.
(3) when playing programs, the IP address of Media Stream control module inquiring client terminal, and client ip, program ID, current broadcast state be kept in the broadcast program list.The Media Stream control module reads media data according to program ID, and data are sent to the video compression and the converting system of client, and upgrades current broadcast state and play position at any time.
(3) when playing programs is suspended, Media Stream control module broadcast state is set to suspend, and stops the reading and sending of media data also no longer substituted play position, and client can not receive media signal, plays also to stop thereupon.
(4) when recovering playing programs, Media Stream control module broadcast state is set to play, and begins to read and send media data according to current play position, and client continues broadcast program.
(5) when stopping playing programs, the Media Stream control module stops to read and sending media data, and current broadcast information is deleted from broadcast program list.
(6) when playing programs finishes, the Media Stream control module sends end signal to the transmit control module of client, and current broadcast information is deleted from broadcast program list.
Fig. 3 is a client modules structured flowchart of the present invention, and the client 2 shown in the figure comprises:
Video recording control module 21 is used to receive the record task that the user sends, and described task is sent to the task pretreatment module of service end.When the record task that the user sends can be subscription and video recording, also can be real-time video recording.When subscription and video recording, the video recording control system reads TV program schedule from service end.TV program schedule uses HTML (hypertext author language) to make a webpage usually.The video recording control system is presented at the TV program schedule that reads on the screen, waits for record task.Article one, record task comprises 3 fields: the Close Date of the Start Date of television channel number, recording task and time, recording task and time.When video recording in real time, the user need not import the time started, and this module is with the time started of current time as video recording.If client is equipped with TV signal tuner, the user need not import the channel of record task, and this module will be inquired about TV signal tuner state, and with the channel the watched channel as record task, the user only need import the concluding time of video recording.
Described video recording control module further comprises:
Record submodule, be used for obtaining list of television programmes, and import the task of performance recording as the user after, user's task is sent to described service end from described service end;
The management submodule is used for obtaining recorded program table from described service end, the task that leading subscriber is assigned, and guide the user to recorded program play, send, download, montage and operation that recorded program is derived;
The playback controls module, be used in progress program stop, control such as broadcast, time-out, F.F., rewind down.
Transmit control module 22 is used to receive the Play Control signal that the user sends, and this signal is sent to the Media Stream control module of service end.This module reads the media library program contents of being safeguarded automatically by media database from service end earlier.The media library program contents is also made a webpage with HTML usually.The media library program contents that reads is presented on the screen, waits for playing task.The program ID and the instruction code that must must comprise in the media library let alone in every drilling, as play, stop, instruction code such as time-out.
Video compression and modular converter 23, the program data that is used for that service end is sent carry out decompress(ion) and contract the data after decompressing are converted to the signal that playback equipment can be handled, and play then.In the reality, this module can be made of video compression chip and number-mould conversion chip two parts.When request program, this module constantly is stored in packed data in the internal memory, and the video compression chip discharges packed data, and vision signal is separated with audio signal.Vision signal and audio signal are sent to display system and audio system number-mould conversion respectively.
Adopt the present invention, can record cable television program in service end.The video recording control module of client receives record task, and record task is passed to service end.These tasks can be the instantaneous recording tasks, also can be the subscription and video recording tasks.The task pretreatment module of service end merges user's iterative task, generates the record task tabulation.The time started of each record task in the tabulation of Mission Monitor module monitors record task.In a single day record task expires, and the Mission Monitor system will notify video compression apparatus that the program on the user-selected channel is compressed, and with the compression deposit data in media database.Media database upgrades the index and the content program table of media library automatically.After record task was finished, the user just can pass through client program request recorded program.During user's program request recorded program, the Media Stream control module that program request instruction transmit control module and the broadband networks by client is transferred to service end, by Media Stream control module control media database corresponding compression program data are transferred to the video compression and the converting system of client by broadband networks, are converted to the receptible form output of image playing device.
Claims (3)
1, a kind of wide band recording-reproducing system comprises: connects the service end of broadband networks and cable television network and is connected a plurality of clients of broadband networks,
Described service end, be used to manage the performance recording task that described client is sent, recording TV program and recorded program compressed storage as requested, provide listing to described client, the mission requirements that sends according to described client to program play, send, download, montage, deletion and recorded program derived, and provide the program data of compression and the Play Control of customer in response end during to the client playback to client at program;
Described service end comprises:
Media database is used to finish access, additions and deletions, the index operation of media data, and revises program contents automatically according to the media library content;
The Media Stream control module is used for receiving control command from client the media data flow between control client and the service end;
The task pretreatment module is used to set up network monitoring, monitors the record task that transmits from client, and described record task is carried out following processing: receiving of task is divided into groups by television channel number, and the task that all television channel number are identical is returned at one group; And each is organized the interior overlapped task of video time section organize interior merging;
The Mission Monitor module, be used for whenever checking record task and current task at interval through a regular time, for matured task, the notice video compressing module begins video recording, for having finished of task, the notice video compressing module stops video recording, and the program that records is added in the media database;
Video compressing module is used for receiving control command from the task monitoring modular, and the cable TV signal compression of specified channel is stored in the media database;
Described client, receive user's control command, and this instruction is sent to service end, according to the programme information that obtains from described service end, the interface of guides user operation is provided to the user, and when accepting the program of described service end playback, the packed data that described service end is transmitted decompresses;
Described client comprises:
Transmit control module is used to receive the Play Control signal that the user sends, and this signal is sent to the Media Stream control module of service end;
Video compression and modular converter, the program data that is used for that service end is sent carry out decompress(ion) and contract the data after decompressing are converted to the signal that playback equipment can be handled, and play then;
The video recording control module is used to receive the record task that the user sends, and described task is sent to the task pretreatment module of service end.
2, wide band recording-reproducing system according to claim 1 is characterized in that: described video recording control module comprises:
Record submodule, be used for obtaining list of television programmes, and import the task of performance recording as the user after, user's task is sent to described service end from described service end;
The management submodule is used for obtaining recorded program table from described service end, the task that leading subscriber is assigned, and guide the user to recorded program play, send, download, montage and operation that recorded program is derived;
The playback controls module, be used in progress program stop, the control of broadcast, time-out, F.F., rewind down.
3, wide band recording-reproducing system according to claim 1 is characterized in that: described video compressing module comprises: TV signal tuner and video encoder,
Described TV signal tuner, the TV signal that is used to separate specified channel is converted to the video format that digital signal offers the appointment of described video encoder boil down to described TV signal, stores into then in the described media database.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011188758A CN1162000C (en) | 2001-06-28 | 2001-06-28 | Wide band recording-reproducing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011188758A CN1162000C (en) | 2001-06-28 | 2001-06-28 | Wide band recording-reproducing system |
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| CN1339920A CN1339920A (en) | 2002-03-13 |
| CN1162000C true CN1162000C (en) | 2004-08-11 |
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| CNB011188758A Expired - Fee Related CN1162000C (en) | 2001-06-28 | 2001-06-28 | Wide band recording-reproducing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008106856A1 (en) * | 2007-03-02 | 2008-09-12 | Huawei Technologies Co., Ltd. | Content management method and providing method for vod service and relevant device and system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4222295B2 (en) | 2004-11-19 | 2009-02-12 | パナソニック株式会社 | Video server and video distribution system using the same |
| CN101179702B (en) * | 2007-12-03 | 2010-12-29 | 中兴通讯股份有限公司 | Real time recording method of IPTV living broadcast television |
| EP2211522A4 (en) * | 2007-12-06 | 2012-04-18 | Huawei Tech Co Ltd | Media stream control method, system and logic entity |
| CN101635830B (en) * | 2009-08-18 | 2011-09-28 | 深圳市同洲电子股份有限公司 | Method of video on demand, server side and client side |
| CN102196225B (en) * | 2010-03-19 | 2014-02-12 | 新奥特（北京）视频技术有限公司 | Video collection playback system and method |
| CN101980529A (en) * | 2010-09-21 | 2011-02-23 | 天栢宽带网络科技（上海）有限公司 | Video service system supporting integration of three networks |
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2001
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008106856A1 (en) * | 2007-03-02 | 2008-09-12 | Huawei Technologies Co., Ltd. | Content management method and providing method for vod service and relevant device and system |
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| CN1339920A (en) | 2002-03-13 |
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