CN102378066A - Method and system for realizing low-bit rate and high-definition video on demand - Google Patents
Method and system for realizing low-bit rate and high-definition video on demand Download PDFInfo
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Abstract
The invention discloses a method and a system for realizing low-bit rate and high-definition video on demand and relates to the field of user on demand in an IPTV (internet protocol television) system. The method comprises the following steps: in the IPTV system, a network side releases videos after low-bit rate and high-definition identifiers are added into low-bit rate and high-definition media files; when the low-bit rate and high-definition media files are on demand, a terminal side sends an on-demand request with the maximum bandwidth capability in nodes to the network side; and the network side receives the on-demand request, generates flow control information according to the maximum bandwidth capability in the nodes after detecting that the low-bit rate and high-definition identifiers in the low-bit rate and high-definition media files which are requested to be on demand are effective, and sends the low-bit rate and high-definition media files which are requested to be on demand to the terminal side according to the flow control information. According to the method and the system, user experience can be improved, and the practicability and the usability of the IPTV system are improved in the user on demand process in the IPTV system.
Description
Technical field
The present invention relates to user's program request field in the IPTV IPTV system; Comprise video request program VOD, real-time video program request TVOD, time-moving television program request TSTV, relate in particular to a kind of flow that utilizes and send out complete method and system that control realizes low code check high definition program request soon.
Background technology
The IPTV technology has become a hot technology at present, and along with the IPTV business is constantly expanded, the solution of IPTV also emerges in an endless stream.With regard to basic service, mainly contain two types, one type is the channel service that all user's synchronizations are seen identical content, another kind of is the demand (telecommunication) service of each user's free fast forwarding and fast rewinding of difference and positioning playing.Wherein, said channel service mainly comprises common direct broadcast band, takes turns and broadcast channel, time shift channel, watches the user of programme televised live to depend on these channels.Said demand (telecommunication) service mainly comprises VOD program request, TVOD program request and the user TSTV program request on the time shift channel.
Diversity of operations has determined the diversity of solution.For demand (telecommunication) service, need carry out the control of the reading of content file, playing progress rate and send the flow control and the film source content release of medium stream packet.In present IPTV VOD system; When the used VOD file of program request is the high definition film source; Two kinds of processing methods are arranged: the one, issue high-definition content with high code check, and put sowing time in high definition at STB STB, adopt the conventional medium mode of giving out a contract for a project to realize the service of high definition on-demand media; The 2nd, when intranodal does not have the high definition film source; Can this broadcasting user be redirected to the dependence node; With conventional media-on-demand handling process media services are provided, but the dependence to node with high definition film source is big like this, the high definition on-demand media service ability that provides is limited.All there is bigger influence in these two kinds of processing methods for user experience, have also reduced the practicality and the ease for use of IPTV system simultaneously.
Therefore, prior art is badly in need of improving and development.
Summary of the invention
The object of the present invention is to provide a kind of method and system of realizing low code check high definition program request, be used for the demand of high definition service being provided for the user at insufficient bandwidth and the not enough node of high code check film source.
According to an aspect of the present invention, a kind of method of low code check high definition program request that realizes provided by the invention comprises:
In the IPTV system, network side is issued after in low code check high definition media file, adding low code check high definition sign;
When code check high definition media file was hanged down in program request, the order request that end side will carry the intranodal maximum bandwidth capability was sent to network side;
Network side receives said order request; And the sign of the low code check high definition in the low code check high definition media file that detects the request program request effectively after; According to the intranodal maximum bandwidth capability; Generate flow control information, and, the low code check high definition media file of asking program request is sent to end side according to said flow control information.
Said network side adds the step of issuing after the low code check high definition sign and comprises in low code check high definition media file:
The streaming media service unit of network side adds low code check high definition sign in the Session Description Protocol SDP information of low code check high definition media file;
The said low code check high definition media file that adds low code check high definition sign is carried out transcoding to be handled and issues.
Said intranodal maximum bandwidth capability comprises the maximum bandwidth and the buffer memory spatial value of STB.
If end side is not sent to network side with the maximum bandwidth of STB, the acquiescence maximum bandwidth is set to the maximum bandwidth of STB.
The step of said generation flow control information comprises:
After the Service Processing Unit of network side receives said order request, detect the low code check high definition sign in the low code check high definition media file of asking program request;
When said low code check high definition identifies when effective; Maximum bandwidth and buffer memory spatial value according to said STB; Calculating comprises the fast flow control information of sending out duration, and the file open request that will carry flow control information and intranodal maximum bandwidth capability is sent to the media services unit of network side.
The step that the said low code check high definition media file that will ask program request is sent to end side comprises:
Said low code check high definition media file is opened according to said file open request in the media services unit of network side; And judging that wherein low code check high definition identifies when effective, the low code check high definition media file that in said fast duration, will ask program request is sent to end side with the maximum bandwidth of said STB.
According to another aspect of the present invention, a kind of system of low code check high definition program request that realizes provided by the invention comprises the STB that is positioned at end side, the Service Processing Unit that is positioned at network side and media services unit, wherein:
Said STB when code check high definition media file is hanged down in program request, is sent to network side with the order request that carries the intranodal maximum bandwidth capability;
Said Service Processing Unit is used to receive said order request, and the sign of the low code check high definition in the low code check high definition media file that detects the request program request effectively after, according to the intranodal maximum bandwidth capability, generate flow control information;
Said media services unit is used for the system at IPTV, in low code check high definition media file, adds and issues after low code check high definition identifies, and according to said flow control information, the low code check high definition media file of asking program request is sent to end side.
Further, said Service Processing Unit comprises:
Business module is used for the order request that carries the intranodal maximum bandwidth capability that the STB of receiving terminal side sends, and said intranodal maximum bandwidth capability comprises the maximum bandwidth and the buffer memory spatial value of STB;
Real time streaming transport protocol RTSP module; Be used for detecting the low code check high definition sign of the low code check high definition media file of asking program request; And identify when effective when said low code check high definition; According to said STB maximum bandwidth and buffer memory spatial value, calculate and to comprise the fast flow control information of sending out duration, and the file open request that will carry flow control information and intranodal maximum bandwidth capability is sent to the media services unit.
Further, said media services unit comprises:
The service agent module is used to receive the file open request that the RTSP module is sent;
The Streaming Media module; Be used for according to said file open request; Open the said low code check high definition media file of request program request; And judging that wherein said low code check high definition identifies when effective, will ask the low code check high definition media file of program request to be sent to end side with said STB maximum bandwidth in said fast duration.
Further, said Streaming Media module also is used for adding low code check high definition in the Session Description Protocol SDP information of low code check high definition media file and identifies, and the said low code check high definition media file that adds low code check high definition sign is carried out transcoding handle and issue.
Compared with prior art, beneficial effect of the present invention is: the present invention can provide the high definition service for the user on the node of insufficient bandwidth and high code check film source deficiency, and the service pressure that has improved the high definition node is simultaneously realized the high definition service of load balancing.
Description of drawings
Fig. 1 is a kind of method schematic diagram of realizing low code check high definition program request that the embodiment of the invention provides;
Fig. 2 is that the IPTV program request that the embodiment of the invention provides is the media services flow chart that flow control realizes low code check high definition.
Embodiment
To a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment only is used for explanation and explains the present invention, is not limited to the present invention below in conjunction with accompanying drawing.
Fig. 1 has shown a kind of method schematic diagram of realizing low code check high definition program request that the embodiment of the invention provides, and as shown in Figure 1, step comprises:
Step S101, in the IPTV system, network side is issued after in low code check high definition media file, adding low code check high definition sign.Specifically; The streaming media service unit of network side adds low code check high definition sign in the Session Description Protocol SDP information of low code check high definition media file; Then, the said low code check high definition media file that adds low code check high definition sign being carried out transcoding handles and issues.
That is to say; The node of network side is in order to satisfy the order program service demand that low code check high definition is provided, for the content of low code check high definition, such as the MPG format content; When issue; Need to issue through transcoding, the present invention supports low code check high definition identification field through the Streaming Media module of streaming media service unit in the inside increase of assembling SDP information in the preliminary treatment link of transcoding again.
Step S102, when the low code check high definition media file of program request, the order request that end side will carry the intranodal maximum bandwidth capability is sent to network side.Wherein, said intranodal maximum bandwidth capability comprises the maximum bandwidth and the buffer memory spatial value of STB, if end side is not sent to network side with the maximum bandwidth of STB, then gives tacit consent to the maximum bandwidth that maximum bandwidth is set to STB.
In other words; When code check high definition media file is hanged down in program request; The STB of end side is sent to network side with the order request that the form of RTSP message will carry the maximum bandwidth capability of intranodal, and wherein, said intranodal maximum bandwidth capability comprises STB maximum bandwidth tolerance Bandwidth; Be maximum bandwidth, and spatial cache value BurstSize.The maximum bandwidth of said STB is meant the bandwidth constraints service ability of STB, is low code check high definition media file is sent to end side from network side maximum bandwidth.If STB does not report said maximum bandwidth, then media server directly issues an acquiescence maximum bandwidth and gives Streaming Media, for example 3Mbps.
Step S103, network side receive said order request; And the sign of the low code check high definition in the low code check high definition media file that detects the request program request effectively after; According to the intranodal maximum bandwidth capability; Generate flow control information, and, the low code check high definition media file of asking program request is sent to end side according to said flow control information.Specifically; After the Service Processing Unit of network side receives said order request; Detect the low code check high definition sign in the low code check high definition media file of request program request, when said low code check high definition identifies when effective, according to the maximum bandwidth and the buffer memory spatial value of said STB; Calculating comprises the fast flow control information of sending out duration, and the file open request that will carry flow control information and intranodal maximum bandwidth capability is sent to the media services unit of network side.Said low code check high definition media file is opened according to said file open request in the media services unit of network side; And judging that wherein low code check high definition identifies when effective, the low code check high definition media file that in said fast duration, will ask program request is sent to end side with the maximum bandwidth of said STB.
Put it briefly; When the announced low code check high-definition content of program request; The Streaming Media module of media services unit is carried out flow and is sent out control soon according to low code check high definition sign and intranodal maximum bandwidth capability, promptly utilizes low code check to send out soon high-definition effect is presented to the user.Further; Please seek quickness when sending out when STB, for low code check high-definition content, network side calculates a duration soon according to the maximum bandwidth Bandwidth of spatial cache value BurstSize and STB; The Streaming Media module is according to said fast duration; Fast speed according to default is the STB maximum bandwidth, carries out the flow control of medium bag, realizes the media services effect of high definition.
Fig. 2 has shown that the IPTV program request that the embodiment of the invention provides is the media services flow chart that flow control realizes low code check high definition, and is as shown in Figure 2, comprising:
Step S201, medium positioning service system MLSS module are carried out the management and the distribution of order program service, and the order request about media services that makes STB send is preferentially chosen home node and served.
Step S202, STB send to the Service Processing Unit of home node with order request, carry the intranodal maximum bandwidth capability in the said order request.
After the business module of step S203, Service Processing Unit received said order request, the RTSP module increased the some broadcasting user.
Whether the low code check high definition sign of the RTSP module detection of step S204, Service Processing Unit is effective, and after judging that hanging down the code check high definition identifies effectively, calculates flow control informations such as a fast duration according to the intranodal maximum bandwidth capability.
The RTSP module of step S205, Service Processing Unit is sent file open request to the media services unit.
The service agent module of step S206, media services unit receives said file open request, the said Streaming Media module media file that the request of opening is play according to said file open request.
Whether the low code check high definition sign in the SDP information of step S207, parsing media file is effective.
Step S208, Streaming Media module are detecting said low code check high definition sign when effective; The fast information such as media code flow rate and duration of sending out of control when playing; Promptly at the fast STB that media file is sent to end side according to the maximum bandwidth of STB of sending out in the duration; Realize the high definition program request of low code check film source, strengthen the user's viewing effect.
In addition, can see that a kind of system of low code check high definition program request that realizes comprises the STB that is positioned at end side, the Service Processing Unit that is positioned at network side and media services unit by present embodiment, wherein:
Said STB is used for when code check high definition media file is hanged down in program request, the order request that carries the intranodal maximum bandwidth capability being sent to network side.
Said Service Processing Unit; Be used to receive said order request; And the sign of the low code check high definition in the low code check high definition media file that detects the request program request effectively after; According to the intranodal maximum bandwidth capability, generate flow control information, promptly calculate the flow control information that comprises a fast duration according to STB maximum bandwidth and buffer memory spatial value.Further, said Service Processing Unit comprises:
Business module is used for the order request that carries the intranodal maximum bandwidth capability that receiving terminal side STB sends, and said intranodal maximum bandwidth capability comprises the maximum bandwidth and the buffer memory spatial value of STB;
The RTSP module; Be used for detecting the low code check high definition sign of the low code check high definition media file of asking program request; And identify when effective when said low code check high definition; According to the maximum bandwidth and the buffer memory spatial value of said STB, calculate and to comprise the fast flow control information of sending out duration, and the file open request that will carry flow control information and intranodal maximum bandwidth capability is sent to the media services unit.
Said media services unit; Be used for system at IPTV; Issue after in low code check high definition media file, adding low code check high definition sign, and, the low code check high definition media file of asking program request is sent to end side according to said flow control information; Promptly after confirming that said low code check high definition sign effectively, in said fast duration, will ask the low code check high definition media file of program request to be sent to end side with said STB maximum bandwidth.Further, said media services unit comprises:
The service agent module is used to receive the file open request that the RTSP module is sent;
The Streaming Media module; Be used for according to said file open request; Open the said low code check high definition media file of request program request; And judging that wherein low code check high definition identifies when effective, will ask the low code check high definition media file of program request to be sent to end side with said STB maximum bandwidth in said fast duration.Said Streaming Media module also is used for adding low code check high definition in the Session Description Protocol SDP information of low code check high definition media file and identifies, and the said low code check high definition media file that adds low code check high definition sign is carried out transcoding handle and issue.
Further, said system also comprises the MLSS module that is positioned at end side that is used to manage and distribute order program service.
In sum, the present invention has following technique effect:
1, the present invention avoids during film source with high code check issue high-definition content in issue, has reduced when issuing the taking of node bandwidth, and effectively promotes other service ability of node;
2, the present invention increases low code check high definition sign in the SDP information of low code check high definition media file, and practicality is stronger, and is little to original node networking mode and implementation reconstruct influence;
3, the present invention sends low code check high definition media file through carrying out the control of fast sending flow amount when the high definition order request is arranged, and makes the transmission of on-demand content be no longer dependent on the source code rate, can make full use of existing content the high-quality media services are provided, and has improved user experience.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with general media services device, in general, can be distributed on the network that a plurality of media server forms.They can be realized with executable program code on the media server; Thereby; Can they carried out on the media server arbitrarily, and in some cases, can carry out step shown or that describe with the order that is different from here; Perhaps they are made into each media services step respectively, perhaps are combined into new media services flow process.Like this, the present invention is not restricted to any specific hardware and software combination.
Although preceding text specify the present invention, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of making according to the principle of the invention all are to be understood that to falling into protection scope of the present invention.
Claims (10)
1. a method that realizes low code check high definition program request is characterized in that, comprising:
In IPTV IPTV system, network side is issued after in low code check high definition media file, adding low code check high definition sign;
When code check high definition media file was hanged down in program request, the order request that end side will carry the intranodal maximum bandwidth capability was sent to network side;
Network side receives said order request; And the sign of the low code check high definition in the low code check high definition media file that detects the request program request effectively after; According to the intranodal maximum bandwidth capability; Generate flow control information, and, the low code check high definition media file of asking program request is sent to end side according to said flow control information.
2. method according to claim 1 is characterized in that, said network side adds the step of issuing after the low code check high definition sign and comprises in low code check high definition media file:
The streaming media service unit of network side adds low code check high definition sign in the Session Description Protocol SDP information of low code check high definition media file;
The said low code check high definition media file that adds low code check high definition sign is carried out transcoding to be handled and issues.
3. method according to claim 2 is characterized in that, said intranodal maximum bandwidth capability comprises the maximum bandwidth and the buffer memory spatial value of STB.
4. method according to claim 2 is characterized in that, if end side is not sent to network side with the maximum bandwidth of STB, the acquiescence maximum bandwidth is set to the maximum bandwidth of STB.
5. according to claim 3 or 4 described methods, it is characterized in that the step of said generation flow control information comprises:
After the Service Processing Unit of network side receives said order request, detect the low code check high definition sign in the low code check high definition media file of asking program request;
When said low code check high definition identifies when effective; Maximum bandwidth and buffer memory spatial value according to said STB; Calculating comprises the fast flow control information of sending out duration, and the file open request that will carry flow control information and intranodal maximum bandwidth capability is sent to the media services unit of network side.
6. method according to claim 5 is characterized in that, the step that the said low code check high definition media file that will ask program request is sent to end side comprises:
Said low code check high definition media file is opened according to said file open request in the media services unit of network side; And judging that wherein low code check high definition identifies when effective, the low code check high definition media file that in said fast duration, will ask program request is sent to end side with the maximum bandwidth of said STB.
7. a system that realizes low code check high definition program request is characterized in that, comprises the STB that is positioned at end side, the Service Processing Unit that is positioned at network side and media services unit, wherein:
Said STB is used for when code check high definition media file is hanged down in program request, the order request that carries the intranodal maximum bandwidth capability being sent to network side;
Said Service Processing Unit is used to receive said order request, and the sign of the low code check high definition in the low code check high definition media file that detects the request program request effectively after, according to the intranodal maximum bandwidth capability, generate flow control information;
Said media services unit is used for the system at IPTV, in low code check high definition media file, adds and issues after low code check high definition identifies, and according to said flow control information, the low code check high definition media file of asking program request is sent to end side.
8. system according to claim 7 is characterized in that, said Service Processing Unit comprises:
Business module is used for the order request that carries the intranodal maximum bandwidth capability that the STB of receiving terminal side sends, and said intranodal maximum bandwidth capability comprises the maximum bandwidth and the buffer memory spatial value of STB;
Real time streaming transport protocol RTSP module; Be used for detecting the low code check high definition sign of the low code check high definition media file of asking program request; And identify when effective when said low code check high definition; According to the maximum bandwidth and the buffer memory spatial value of said STB, calculate and to comprise the fast flow control information of sending out duration, and the file open request that will carry flow control information and intranodal maximum bandwidth capability is sent to the media services unit.
9. system according to claim 7 is characterized in that, said media services unit comprises:
The service agent module is used to receive the file open request that the RTSP module is sent;
The Streaming Media module; Be used for according to said file open request; Open the said low code check high definition media file of request program request; And judging that wherein low code check high definition identifies when effective, the low code check high definition media file that in said fast duration, will ask program request is sent to end side with the maximum bandwidth of said STB.
10. system according to claim 7; It is characterized in that; Said Streaming Media module also is used for adding low code check high definition in the Session Description Protocol SDP information of low code check high definition media file and identifies, and the said low code check high definition media file that adds low code check high definition sign is carried out transcoding handle and issue.
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| CN102378066B (en) | 2017-09-29 |
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