CN103457907A - Method, equipment and system for multimedia content distribution - Google Patents
Method, equipment and system for multimedia content distribution Download PDFInfo
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- CN103457907A CN103457907A CN2012101699211A CN201210169921A CN103457907A CN 103457907 A CN103457907 A CN 103457907A CN 2012101699211 A CN2012101699211 A CN 2012101699211A CN 201210169921 A CN201210169921 A CN 201210169921A CN 103457907 A CN103457907 A CN 103457907A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H—ELECTRICITY
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
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Abstract
The embodiment of the invention provides a method, equipment and a system for multimedia content distribution. The method includes allowing service nodes to receive a request sent by a terminal and acquire a visit requirement of a first media content; allowing the service nodes to identify the type of the terminal, match a second media content matching with the terminal in types and return to the terminal from each media content stored locally according to the identified type. Each media content stored locally by the service nodes is information, configured by the service nodes according to media content and acquired through multi-format conversion of each original content sent by a CDN content center or acquired from the service nodes transmitted by the CDN content center after multi-format conversion of each original content is performed by the CDN content center according to the media content configured information. By the aid of the method, the equipment and the system, the problems that the existing service is high in computing pressure and storing pressure and low in operating efficiency are solved, and the problems that the media content sent by the service nodes cannot be played and watched normally since the media content cannot match with the terminal in types are avoided.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of multimedia content delivery method, equipment and system.
Background technology
Multimedia service has become the main flow composition of the Internet now, for example, the flow accounting of video frequency requested program broadcasting-like website, video UGC website surpasses more than 80%, but because the video content data amount is huge, nearly all internet video website all by self-built mode or rent mode by content delivering system CDN as its basic transmission network, video content is distributed to network edge, thus the program request or the live content that make terminal can the fast access website provide.
At present to the distribution of above-mentioned content of multimedia is general, adopt following method: each original media content website, source or content supplier (CP) provided by operation system (for example, video content) processing of repeatedly encoding, generation is applicable to the broadcasting of different terminals type, the content of multimedia of different resolution and code check, operation system is play these different terminals types again, the content of multimedia of different resolution and code check sends to content distributing network CDN content center, be issued to each service node of network edge by the CDN content center, the user need initiatively download the content of multimedia of different resolution or code check according to self terminal type and demand from each service node, after download, play.
By existing multimedia content delivery method, can be found out, after operation system first converts each original media content the media content of a plurality of different editions to, send to again CDN, so just to operation system, bring very large computing pressure and storage pressure, also increase the media data treating capacity while injecting the CDN content center, greatly reduced operational efficiency.Moreover, because the part terminal is comprehensive not for the support of media content format, can't play the part of media content in the Internet, for example, for the Flash(*.flv of extensive use in the Internet) form, comprise excellent cruel, potato, cruel 6, the video website such as Youtube all adopt this form, but the terminal equipment of apple (Apple), comprise iPad, iPod, iPhone etc., just do not support the Flash form, this just makes in the situation that client and browser plug-in additionally are not installed, all can not normal play from service node obtains some formatted file and watch, for the mobile terminal of dedicated decoders not being installed for major part, can not normally access and play, this does not mate with regard to the content of multimedia that service node occurred and send and terminal type, and cause can't normal play and the problem of watching.
Summary of the invention
The embodiment of the present invention provides a kind of multimedia content delivery method, equipment and system, in order to solve the problem that existing operation system computing pressure is large, storage pressure is large and operational efficiency is low, and the content of multimedia that sends of service node and terminal type do not mate, and cause can't normal play and the problem of watching.
Based on the problems referred to above, a kind of multimedia content delivery method that the embodiment of the present invention provides comprises: the access request in order to acquisition request the first media content that the service node receiving terminal sends; Described service node is identified the type of described terminal, and according to the type identified, from each media content that preserve this locality, match and media formats and described terminal consistent with described the first media content type matching the second media content and return to described terminal; Local described each media content preserved of described service node is that described service node is according to the media content configuration information, each original media content that content distributing network CDN content center is sent carries out that multi-format is converted to, be perhaps the CDN content center according to the media content configuration information, each original media content is carried out after the multi-format conversion being transmitted to described service node obtains.
A kind of service node device that the embodiment of the present invention provides comprises: receiver module, for receiving the first media content access request sent by terminal; Identification module, for identifying the type of described terminal; Modular converter, for according to the media content configuration information, carry out the multi-format conversion by each original media content of content distributing network CDN content center transmission, generates described each media content; Memory module, for storing described each media content after described modular converter is changed, and described CDN content center is carried out described each original media content according to the media content configuration information described each media content forwarded after the multi-format conversion; Matching module, type for the described terminal that identifies according to described identification module, in described each media content from described memory module, match the second media content of the type matching of media content and media formats and described terminal consistent with described the first media content; Sending module, for sending to described terminal by described the second media content.
A kind of CDN content center equipment that the embodiment of the present invention provides comprises: modular converter, for according to the media content configuration information, each original media content is carried out to the multi-format conversion, and generate each media content; Sending module, for sending to service node by described each media content.
A kind of multimedia content distribution system that the embodiment of the present invention provides, comprise: described at least one content distributing network CDN content center, with a plurality of service nodes that are connected with each described CDN content center, described CDN content center, be used for according to the media content configuration information, each original media content is carried out to the multi-format conversion, generate each media content, and be transmitted to described service node; Described service node, be stored in this locality for described each media content that described CDN content center is forwarded, perhaps for according to described media content configuration information, described each original media content that described CDN content center is forwarded is carried out the multi-format conversion, generates described each media content and is stored in this locality; And for receiving the access request of acquisition request the first media content sent by terminal, identify the type of described terminal, and according to the type of the described terminal identified, from described each media content that preserve this locality, match media content and media formats and described terminal consistent with described the first media content type matching the second media content and return to described terminal.
The beneficial effect of the embodiment of the present invention comprises: the multimedia content delivery method that the embodiment of the present invention provides, service node, CDN content center equipment and system, when service node receives the access request of acquisition request the first media content that terminal sends, service node first identifies the type of terminal, again according to the type identified, each media content of preserving from this locality, match the second media content of the type matching of media content and media formats and terminal consistent with the first media content, then return to terminal; Above-mentioned local each media content of preserving is that service node is according to the media content configuration information, each original media content that the CDN content center is sent carries out that multi-format is converted to, or the CDN content center is according to the media content configuration information, each original media content is carried out after the multi-format conversion being transmitted to described service node obtains.Visible, in embodiments of the present invention, each original media content to be carried out to the conversion of multiple format by CDN content center or service node, operation system need not be processed each original media content again, only each original media content being handed down to the CDN content center gets final product, this has just greatly alleviated the computing pressure of operation system and has stored pressure, has improved the operational efficiency of operation system.In addition, in embodiments of the present invention, service node can identify the type of terminal, will return to terminal with the second media content of the first media content coupling, and this does not mate with regard to the content of multimedia having been avoided service node and send and terminal type, and cause can't normal play and the problem of watching.
The accompanying drawing explanation
The flow chart of the multimedia content delivery method that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 sends to the flow chart of service node for the CDN content center that the embodiment of the present invention provides by active mode;
Fig. 3 sends to the flow chart of service node for the CDN content center that the embodiment of the present invention provides by passive mode;
Fig. 4 processes one of flow chart of each original media content and distribution for the CDN content center that the embodiment of the present invention provides;
The CDN content center that Fig. 5 provides for the embodiment of the present invention process each original media content and distribution flow chart two;
Fig. 6 distributes the flow chart of each media content for the CDN content center that the embodiment of the present invention provides with active mode and passive mode;
Fig. 7 processes one of flow chart of each original media content for the service node that the embodiment of the present invention provides;
The service node that Fig. 8 provides for the embodiment of the present invention process each original media content flow chart two;
One of flow chart of the type of the service node identification terminal that Fig. 9 provides for the embodiment of the present invention;
Two of the flow chart of the type of the service node identification terminal that Figure 10 provides for the embodiment of the present invention;
The terminal that Figure 11 provides for the embodiment of the present invention adopts one of business process map of http protocol access services node;
The terminal that Figure 12 provides for the embodiment of the present invention adopt http protocol access services node business process map two;
The terminal that Figure 13 provides for the embodiment of the present invention is utilized one of business process map of RTSP protocol access service node;
The terminal that Figure 14 provides for the embodiment of the present invention utilize RTSP protocol access service node business process map two;
The structure chart of the service node device that Figure 15 provides for the embodiment of the present invention;
The structure chart of the CDN content center equipment that Figure 16 provides for the embodiment of the present invention;
The structure chart of the multimedia content distribution system that Figure 17 provides for the embodiment of the present invention;
The building-block of logic of the multimedia content distribution system that Figure 18 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with Figure of description, a kind of multimedia content delivery method that the embodiment of the present invention is provided, the embodiment of equipment and system describe.
A kind of multimedia content delivery method that the embodiment of the present invention provides as shown in Figure 1, specifically comprises the following steps:
S101: the access request in order to acquisition request the first media content that the service node receiving terminal sends;
S102: the type of service node identification terminal;
S103, service node, according to the type identified, each media content of preserving from this locality, match the second media content of the type matching of and media formats and terminal consistent with the first media content; Local each media content preserved of service node is that service node is according to the media content configuration information, each original media content that content distributing network CDN content center is sent carries out that multi-format is converted to, be perhaps the CDN content center according to the media content configuration information, each original media content is carried out after the multi-format conversion being transmitted to service node obtains;
S104: second media content that will match returns to terminal.
In embodiments of the present invention, terminal can be user terminal, and the embodiment of the present invention does not limit the particular type of terminal.In addition, complete each original media content is carried out to the multi-format conversion by CDN content center or service node, each original media content issued for operation system, the different editions media content generated for same media content, support to generate many versions metadata (many versions media content) of the overall situation, can pass through filename between different editions, sign or suffix are distinguished, when terminal request is obtained media content, support is sent to terminal according to many versions media content metadata by most suitable (being complementary with the media content of terminal request) media content, concrete many versions media content information is as shown in table 1:
Table 1
Further, in step S102, service node or CDN content center, according to the media content configuration information, are carried out the multi-format conversion by each original media content, specifically comprise:
Service node or CDN content center are according to media parameter information corresponding to media form in the media content configuration information issued by network management and control center, each original media content is carried out to the multi-format conversion, generate respectively the media content of corresponding form, in embodiments of the present invention, media parameter information can comprise one of following parameter or combination in any: media code rate by utilizing, resolution, file format, for example aforementioned media code rate by utilizing can be the video/audio code check, in cataloged procedure, adopt different sampling frequency and algorithms to carry out recompile to video/audio, above-mentioned service node or CDN content center are media parameter information according to the video/audio code check, when each original media content is carried out to the multi-format conversion, can be 500Kbps by each original media content transcoding of different code checks, 200Kbps, the media content of the code check commonly used such as 120Kbps, thereby can guarantee and various types of terminal couplings.
Aforementioned resolution can be also video resolution, photo resolution etc., and service node or CDN content center can be converted to respectively video or the picture of different resolution by original video or picture, thereby can guarantee and various types of terminal requirements couplings; File format can be video/audio format, the form of the original content of multimedia that the CDN content center sends sometimes is specific format, such as mp4, flv, ts etc., for on certain some terminal, playing the video content of specific format, service node or CDN content center can be converted to the video content of its specific format the media content of the media formats that terminal can support.
Preferably, in above-mentioned steps, the media content configuration data that network management and control center sends operation system obtains the media content configuration information after being processed, be handed down to service node or CDN content center, particularly, in this process, network management and control center is after the media content configuration data that receives the operation system transmission, can first to operation system, return to acknowledge message, then the media content configuration information after processing first is handed down to service node or CDN content center, the media content configuration information obtained after also it can being processed first is handed down to service node or CDN content center, return to acknowledge message by service node or CDN content center to network management and control center, then acknowledge message is returned to operation system again in network management and control center.
In addition, particularly, service node is according to the media content configuration information, and each original media content that the CDN content center is issued is carried out the multi-format conversion, and wherein each original media content of CDN content center is again that operation system is handed down to the CDN content center; The CDN content center, according to the media content configuration information, is equally also that each original media content that operation system is issued is carried out the multi-format conversion.
Further, each media content after the conversion of CDN content center forwarding multi-format, to service node, specifically can be realized by following active or passive mode:
Active mode: after the CDN content center is carried out the multi-format conversion to each original media content, each media content that directly will be converted to sends to service node;
Passive mode: after the CDN content center is carried out the multi-format conversion to each original media content, be temporarily stored in this locality, when receiving the access request of the acquisition request media content of initiating through the terminal of service node forwarding, each temporary media content is sent to service node.
The access request of the acquisition request media content that terminal is initiated, it can be any terminal, that is to say, receive for the first time the access request of the acquisition request media content of any terminal initiation once the CDN content center, each media content that just will keep in sends to service node.
As shown in Figure 2, the CDN content center sends to the flow process of service node specifically can realize by following flow process by active mode:
Each media content that the S201:CDN content center will be converted to sends to service node successively;
The S202:CDN content center sends confirmation of receipt message to service node;
The S203:CDN content center judges whether to receive the reception success message that service node sends, if, execution step S204, if not, repeated execution of steps S201-S203;
The S204:CDN content center finishes the transmission task.
As shown in Figure 3, the CDN content center sends to the flow process of service node specifically can realize by following flow process by passive mode:
Each media content that the S301:CDN content center will be converted to is temporarily stored in this locality;
S302:CDN judges whether to receive the access request that forwards the acquisition request media content of the terminal initiation come through service node, if, execution step S303, if not, execution step S301;
The S303:CDN content center sends to service node successively by each media content;
The S304:CDN content center sends confirmation of receipt message to service node;
The S305:CDN content center judges whether to receive the reception success message that service node sends, if, execution step S306, if not, repeated execution of steps S303-S305;
The S306:CDN content center finishes the transmission task.
Above-mentioned Fig. 2 and Fig. 3 be take the CDN content center each media content after to conversion are carried out initiatively and passive distribution as executive agent, below in conjunction with Fig. 4 to Fig. 8, the CDN content center is processed to each original media content and initiatively and the flow process of passive distribution, and the flow process that service node is processed each original media content is elaborated.
As shown in Figure 4, the CDN content center is processed each original media content and distribution flow specifically comprises the steps:
Operation system (can be (the Content Provider of content supplier, CP) provide media content, can be also service provider (Service Provider, SP) provide media content, this flow process be take CP as example) transmit the media processing configuration data (here to network management and control center, network management and control center also can be referred to as the management and control center), this step also can be understood as CP content distributed adaptive requirement to the management and control center;
Backward CDN content center transfer medium processing configuration data are processed to the media configuration data in network management and control center;
The CDN content center receives data and return to response message to network management and control center after coming into force in this locality;
Response message is returned to CP again in network management and control center;
CP is injected into the CD content center by each original media content;
The CDN content center is processed it after receiving each original media content, generates a plurality of versions of original media content, corresponding to different file formats, code check and resolution;
Media content is initiatively distributed: the support of CDN content center initiatively is distributed to different service nodes by the media content after processing by active mode;
The passive distribution of media content: the CDN content center is stored in this locality by media content data after completing processing, when service node is initiatively initiated media content request to the CDN content center, the CDN content center is sent to media content data the service node of the request of sending again.
In Fig. 4, when operation system sends the media processing configuration data to the CDN content center, after the CDN content center receives these data, just to network management and control center, return to response message, it is the processing mode under synchronous mode that this handling process can be understood as, in addition, can also be by asynchronous mode, as shown in Figure 5, be after network management and control center receives the media processing configuration data that operation system issues, return to response message to operation system at once, issue corresponding media processing configuration data to the CDN content center more afterwards, other flow processs are identical with Fig. 4, do not repeat them here.
As shown in Figure 6, the CDN content center is distributed the flow process of the media content of a plurality of versions with active mode, specifically comprise the steps:
The CDN content center, after completing the local media content and anticipating, is at first initiated the original media content synchronization request to service node, by the distribute media content after processing to the CDN service node;
A plurality of version media contents that the CDN content center is processed according to this locality, initiate the media content synchronization request to service node successively, by the distribute media content of all versions to the CDN service node;
After the media content data of all versions is distributed to service node by the CDN content center, by the CDN content center, to service node, send the Distribution Results acknowledge message;
Service node is replied to the CDN content center, confirms that the media content data of all versions is successfully received;
Continuation is referring to Fig. 6, and the CDN content center is distributed the media content of a plurality of versions with passive mode, specifically comprise the steps:
When terminal is initiated the media content access request, and do not hit at service node, now by service node, to the CDN content center, initiate media content request;
The CDN content center is sent to service node by media content;
Service node sends the original media content data of obtaining from the CDN content center to terminal;
The CDN content center is to many versions media content metadata of service node transfers media content;
Service node returns to response message to the CDN content center, confirms correctly to receive;
Service node, according to the media content metadata received, is initiated the media content request of a plurality of versions to the CDN content center;
The CDN content center is returned to corresponding media content data to service node.
As shown in Figure 7, to process the specific implementation flow process of each original media content as follows for service node:
The media processing configuration data is transmitted at operation system (CP) network management and control center;
The backward service node transfer medium of network management and control center processing processing configuration data;
Service node receives data and return to response message to network management and control center after coming into force in this locality;
In the network management and control, mind-set CP returns to response message;
CP is injected into the CDN content center by original media content;
Terminal is sent the access request to media content;
Service node is to CDN content center request media content;
The CDN content center returns to service node the media content that terminal is asked;
Service node is processed in real time to media content after receiving original media content, generates the wave file that is adapted to this terminal plays of original document, and stores this copy in this locality;
Service node returns to corresponding media content according to the terminal type request to terminal;
The service node media processing result current according to this locality generates corresponding metadata, and this metadata is sent to network management and control center, for carrying out the whole network Content Management in network management and control center.
In Fig. 7, when operation system sends the media processing configuration data to the CDN content center, after the CDN content center receives these data, just to network management and control center, return to response message, it is the processing mode under synchronous mode that this handling process can be understood as, in addition, can also be by asynchronous mode, as shown in Figure 8, be after network management and control center receives the media processing configuration data that operation system issues, return to response message to operation system at once, issue corresponding media processing configuration data to the CDN content center more afterwards, other flow processs are identical with Fig. 7, do not repeat them here.
Further, in above-mentioned steps S102, service node passes through the type of following manner identification terminal:
The type of the access request of acquisition request the first media content that service node judgement terminal sends;
When the type of judging access request is the HTTP data message, according to user agent's (User-Agent) field or bearer types (BearType) field of HTTP datagram header in access request, identify terminal type;
When the type of judging access request is real time streaming transport protocol (Real Time Streaming Protocol, RTSP), during data message, according to (SET-PARAMETER) field of the parameters in access request or Directory Type (Content-Type) field, identify terminal type.
Preferably, as shown in Figure 9, service node is that the bearer types field (BearerType field) according to the HTTP data message header is further judged terminal current network access style, according to the size of network insertion bandwidth, is that terminal matches the second media content that is applicable to this terminal.
As shown in figure 10, service node can be according to the option of PacketPair in Directory Type (Content-Type) field of RTSP protocol data message header, calculate the amount of bandwidth that current terminal is used, service node is determined the terminal network ability according to this amount of bandwidth, thereby match the second media content that is applicable to this terminal, certainly, service node also can be according to the Content-Type field, adopt other existing matching ways, match the second media content that this terminal is applicable to, enumerate no longer one by one at this.
Below in conjunction with 4 embodiment, the multimedia content delivery method that the embodiment of the present invention is provided is elaborated.
Embodiment 1
As shown in figure 11, when terminal is utilized http protocol access services node (in the situation that service node does not hit), the specific implementation flow process is as follows:
Terminal (can be user terminal) is initiated the DNS request to local (Local) domain name system (Domain Name Syterm, DNS) server;
Local DNS authorizes DNS to initiate the domain name mapping request to SP;
SP authorizes DNS to respond the another name of this domain name of LocalDNS in the mode of another name (CNAME);
LocalDNS initiates the domain name mapping request of this another name;
The overall scheduling module is returned to best service node address as analysis result;
Local DNS responds user terminal requests;
User terminal is initiated HTTP GET request to service node;
Service node is according to certain most suitable server of policy selection;
HTTP GET request is initiated in the address that user terminal returns to service node;
Server obtains http header information and is analyzed, by inquiry superior node address superior node (CDN content center/service node) request content;
Optimal media content is transmitted to user terminal after treatment, and this media content can be born by the CDN content center, also can be born by service node.
Embodiment 2
As shown in figure 12, when terminal is utilized http protocol access services node (in the situation that service node hits), the specific implementation flow process is as follows:
Terminal (can be user terminal) is initiated the DNS request to the LocalDNS server;
LocalDNS authorizes DNS to initiate the domain name mapping request to SP;
SP authorizes DNS to respond the another name of this domain name of LocalDNS in the mode of CNAME;
LocalDNS initiates the domain name mapping request of this another name;
The overall scheduling module is returned to best service node address as analysis result;
LocalDNS responds user terminal requests;
User terminal is initiated HTTP GET request to service node;
Service node is according to certain most suitable server of policy selection;
HTTP GET request is initiated in the address that user terminal returns to service node;
Server obtains http header information and is analyzed;
By after treatment the content of applicable user terminal access send to user terminal.
Embodiment 3
As shown in figure 13, when terminal is utilized RTSP protocol access service node (in the situation that service node does not hit), the specific implementation flow process is as follows:
Terminal (can be user terminal) is initiated the DNS request to the Local dns server;
Local DNS authorizes DNS to initiate the domain name mapping request to SP;
SP authorizes DNS to respond the another name of this domain name of LocalDNS in the mode of CNAME;
Local DNS initiates the domain name mapping request of this another name;
The overall scheduling module is returned to best service node address as analysis result;
Local DNS responds user terminal requests;
User terminal is initiated RTSP DESCRIBE request to service node;
Service node is according to the optimal server of certain policy selection;
The new server address that user terminal returns to service node resends RTSP DESCRIBE request;
Obtain the RTSP header information and inquire about the superior node address to its request content;
Obtain media content and return to RTSP DESCRIBE response to user terminal;
User terminal sends RTSP SETUP, PLAY request to server address;
Server returns to RTSP SETUP, PLAY response to user terminal;
User terminal sends RTSP SET_PARAMETER request to server address;
Server obtains the RTSP header information and is analyzed;
Server returns to RTSP SET_PARAMER response to user terminal.
Embodiment 4
As shown in figure 14, when terminal is utilized RTSP protocol access service node (in the situation that service node hits), the specific implementation flow process is as follows:
Terminal (may be user terminal) is initiated the DNS request to the LocalDNS server;
LocalDNS authorizes DNS to initiate the domain name mapping request to SP;
SP authorizes DNS to respond the another name of this domain name of LocalDNS in the mode of CNAME;
LocalDNS initiates the domain name mapping request of this another name;
The overall scheduling module is returned to best service node address as analysis result;
LocalDNS responds user terminal requests;
User terminal is initiated RTSP DESCRIBE request to service node;
Service node is according to the optimal server of certain policy selection, and with RTSP 302, redirected mode sends to user terminal by its address;
The new server address that user terminal returns to service node resends RTSP DESCRIBE request;
Obtain the RTSP header information and analyzed;
Return to RTSP DESCRIBE response to user terminal;
User terminal sends RTSP SETUP, PLAY request to server address;
Server returns to RTSP SETUP, PLAY response to user terminal;
User terminal sends RTSP SET_PARAMETER request to server address;
Server obtains the RTSP header information and is analyzed;
Server returns to RTSP SET_PARAMER response to user terminal;
The supervisory user SOT state of termination, change the parameters such as code check of transferring content at any time.
Based on same inventive concept, the embodiment of the present invention also provides a kind of service node device, as shown in figure 15, the structure chart of the service node device provided for the embodiment of the present invention, service node device comprises receiver module 1501, identification module 1502, modular converter 1503, memory module 1504, matching module 1505 and sending module 1506.
Sending module 1506, for sending to terminal by the second media content.
Preferably, modular converter 1503 is specifically for media parameter information corresponding to media form in the media content configuration information according to being issued by network management and control center, each original media content is carried out to the multi-format conversion, generate respectively the media content of corresponding form, in embodiments of the present invention, media parameter information can comprise one of following parameter or combination in any: media code rate by utilizing, resolution, file format.
Above-mentioned media code rate by utilizing can be the video/audio code check, in cataloged procedure, adopt different sampling frequency and algorithms to carry out recompile to video/audio, above-mentioned modular converter 1503 is parameter according to the video/audio code check, when each original media content is carried out to the multi-format conversion, the media content that can be the code checks commonly used such as 500Kbps, 200Kbps, 120Kbps by each original media content transcoding of different code checks, thus can guarantee and various types of terminal couplings; Resolution can be video resolution, photo resolution etc., and modular converter 1503 can be converted to video or the picture of different resolution by original video or picture, thereby can guarantee and various types of terminal requirements couplings; File format can be video/audio format, the form of the original content of multimedia that the CDN content center sends sometimes is specific format, such as mp4, flv, ts etc., for on certain some terminal, playing the video content of specific format, modular converter 1503 can be converted to the video content of its specific format the media content of the media formats that terminal can support.
Preferably, identification module 1502, the type of the access request of acquisition request the first media content sent specifically for the judgement terminal; When the type of judging is the HTTP data message, according to user agent's field or the bearer types field of HTTP datagram header in access request, identify terminal type; When the type of judging is RTSP protocol data message, according to the parameters field in access request or Directory Type field, identify terminal type.
Based on same inventive concept, the embodiment of the present invention also provides a kind of CDN content center equipment, and as shown in figure 16, CDN content center equipment specifically comprises modular converter 1601 and sending module 1602.
Modular converter 1601, for according to the media content configuration information, carry out the multi-format conversion by each original media content, generates each media content;
Sending module 1602, for sending to service node by each media content.
Preferably, modular converter 1601 is specifically for media parameter information corresponding to media form in the media content configuration information according to being issued by network management and control center, each original media content is carried out to the multi-format conversion, generate respectively the media content of corresponding form, in embodiments of the present invention, media parameter information comprises one of following parameter or combination in any: media code rate by utilizing, resolution, file format.
Based on same inventive concept, the embodiment of the present invention also provides a kind of multimedia content distribution system, as shown in figure 17, multimedia content distribution system specifically comprises at least one content distributing network CDN content center 1701, a plurality of service nodes 1702 that are connected with each CDN content center 1701 and network management and control center 1703, wherein:
In embodiments of the present invention, service node 1702 is to obtain each media content from higher level's service node (CDN content center or service node), provides the services such as web browsing, media content download for subordinate's service node or terminal nearby; Service node 1702 also comprises the terminal capability analysis module, obtain the relevant information of terminal for the access request sent from terminal, and by concrete analysis and calculating, (for example determine the needed media content of terminal, video or audio frequency) the size of form, code check or resolution, service node 802 is when sending the second media content to terminal, to terminal, do not send the first media content of its request, but according to the capability analysis result to terminal, send the second media content after corresponding conversion, thereby can realize better result of broadcast.
Network management and control center 1703, for issuing the media content configuration information to CDN content center 1701 or service node 1702.In embodiments of the present invention, the main functions such as completing user scheduling, resource, Content Management, monitoring of tools and operation management of being responsible in network management and control center 1703.
Further, network management and control center 1703, CDN content center 1701 and service node 1702 include the media processing configuration module, the media content configuration information (also can be described as the media processing configuration parameter) that the media processing configuration module at the media processing configuration module reception network management and control center 1703. of CDN content center 1701 or service node 1702 issues, after the media processing configuration module of service node 1702 can also carry out the multiple format conversion process by each original media content, generate the media content index information of corresponding multiple format, and send to network management and control center 1703, for realizing the global media Content Management in network management and control center 1703.
Further, CDN content center 1701 or service node 1702 also can comprise medium process module, are mainly used in, according to from the media processing configuration module, obtaining the media processing configuration parameter, each original media content being converted to each media content of multiple format.
As shown in figure 18, the logical architecture of content delivering system carried out to brief description once:
The overall scheduling module at network management and control center consists of user's scheduler module, resource management module and content managing module, mainly completes the whole network and controls and traffic control.CDN content center and service node all comprise the submodule of above-mentioned three modules in addition, below the function of user's scheduler module, resource management module and content managing module are introduced respectively.
Content managing module, comprise content view management and the management of many release contents.Content view, as unified content directory database, is born storage and index about the metadata of content, is the core that Content Management is controlled, the distribution situation of maintenance content in caching system.For small documents such as webpage, pictures, the overall scheduling system management is to the domain name level; For the large file such as video, software download, the overall scheduling system management is to file-level.
Resource management module: be responsible for regularly collecting and recording the state information of each service node of the whole network, for example the resource of equipment and health degree situation, the surplus capacity of equipment and the ability that can serve.Support active probe and passive collection two quasi-modes, after the software and hardware resources in service node reaches capacity, can be by user's scheduler module according to preset strategy dispatched users adaptively.
User's scheduler module: obtain distribution, the service condition of equipment from resource management module, according to scheduling strategy, user's request scheduling is arrived to most suitable fringe node, in miss situation, providing service for the user according to miss strategy.Normally used strategy is close judgement, realizes the access to content nearby of user terminal according to the IP address information of the Local DNS of user terminal or user terminal.The request of initiating for user terminal, not directly match user terminal original media content request, but plan as a whole scheduling according to media content view and the distribution services node location of the many versions of original media content.
Network management and control center, CDN content center and service node can comprise the operation management module, by module compositions such as operation support, service management, business monitoring, accounting managements, provide following function:
The operation support module possesses again following function:
CP/SP management: management CP/SP client's essential information provides that the client registers, cancellation and the functions such as client identity audit, rights management and contract management.
Customer service management: the functions such as customer complaint, complaint handling, client's consulting, satisfaction investigation that content delivering system is provided.
Safety and rights management: system security management and classification decentralized management are provided, complete the distribution of keeper, CP/SP account number and the management of corresponding authority etc.
Service management module: the configurations such as channel manage, tactical management are provided for the CP/SP keeper and change and the operation such as look into for the additions and deletions of content, the self-service management that support is initiated by CP/SP, the keeper of operator, also support automatically refreshing according to type of service and content temperature.
Business monitoring module: support to obtain in real time state information and the graphic exhibitions such as complete service distribution, current shared flow, to help the CP/SP keeper, understand the running status of current business.
Accounting management module: management and the statistics of carrying out the charging aspect while to CP/SP, using content delivering system to carry out contents distribution.
Network management and control center, CDN content center and service node can also comprise network management module, and the main function realized is configuration management, performance management, fault management and safety management etc., particularly:
Configuration management: reconfiguring and the recovery configuring function while referring to installation to managed element, assignment, connection and system exception.Configuration management provides collection, discriminating, control from the data of network element and data offered to one group of function of network element, comprises guarantee, situation and control, installation function.
Performance management: performance management refers to the index of real time monitoring managed element, collecting performance data, and can be regularly or make as required the various statistical forms of the utilization of resources and performance change according to historical data.Should be able to be shown performance data with form intuitively, and can be analyzed each performance data of collecting, thereby systematic function is optimized.
Fault management: process or the communication link alarm of fault management charge of overseeing streaming media service platform, the fault warning of the network equipment etc., carry out failure diagnosis and positioning analysis.Can be in time eye-catching notify the custodian, recover rapidly fault.
Safety management: safety management function provides and prevents from having no right the user and use the security means of network to the network user (authorities).Safety management mainly comprises authentication, mandate, confidentiality, integrality and mandate five functions.
Network management and control center can also comprise the service access module, is mainly used in carrying out docking of business with CP/SP, is mainly used in access authentication and the authentication function of CP/SP business from the angle at network management and control center; From the angle of CDN content center, be mainly used in determining the mode of injecting with the CP/SP content.
The multimedia content delivery method that the embodiment of the present invention provides, service node, CDN content center equipment and system, when service node receives the access request of acquisition request the first media content that terminal sends, service node first identifies the type of terminal, again according to the type identified, each media content of preserving from this locality, match the second media content of the type matching of media content and media formats and terminal consistent with the first media content, then return to terminal; Above-mentioned local each media content of preserving is that service node is according to the media content configuration information, each original media content that the CDN content center is sent carries out that multi-format is converted to, or the CDN content center is according to the media content configuration information, each original media content is carried out after the multi-format conversion being transmitted to service node obtains.Visible, in embodiments of the present invention, each original media content to be carried out to the conversion of multiple format by CDN content center or service node, operation system need not be processed each original media content again, only each original media content being handed down to the CDN content center gets final product, this has just greatly alleviated the computing pressure of operation system and has stored pressure, has improved the operational efficiency of operation system.In addition, in embodiments of the present invention, service node can identify the type of terminal, will return to terminal with the second media content of the first media content coupling, and this does not mate with regard to the content of multimedia having been avoided service node and send and terminal type, and cause can't normal play and the problem of watching.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. a multimedia content delivery method, is characterized in that, comprising:
The access request in order to acquisition request the first media content that the service node receiving terminal sends;
Described service node is identified the type of described terminal, and according to the type identified, from each media content that preserve this locality, match and media formats and described terminal consistent with described the first media content type matching the second media content and return to described terminal; Local described each media content preserved of described service node is that described service node is according to the media content configuration information, each original media content that content distributing network CDN content center is sent carries out that multi-format is converted to, be perhaps the CDN content center according to the media content configuration information, each original media content is carried out after the multi-format conversion being transmitted to described service node obtains.
2. the method for claim 1, is characterized in that, service node or CDN content center, according to the media content configuration information, are carried out the multi-format conversion by each original media content, comprising:
Service node or CDN content center are according to media parameter information corresponding to media form in the media content configuration information issued by network management and control center, described each original media content is carried out to the multi-format conversion, generate respectively the media content of corresponding form, described media parameter information comprises one of following parameter or combination in any:
Media code rate by utilizing, resolution, file format.
3. method as claimed in claim 1 or 2, is characterized in that, each media content after the conversion of CDN content center forwarding multi-format, to described service node, comprising:
Described CDN content center directly sends to described service node by described each media content be converted to after described each original media content is carried out to the multi-format conversion; Perhaps
After described CDN content center is carried out the multi-format conversion to described each original media content, be temporarily stored in this locality, when receiving the access request of the acquisition request media content of initiating through the terminal of service node forwarding, temporary described each media content is sent to described service node.
4. method as claimed in claim 1 or 2, is characterized in that, described service node is identified the type of described terminal, comprising:
Described service node judges the type of the access request in order to acquisition request the first media content that described terminal sends;
When the type of judging access request is the HTTP data message, according to user agent's field or the bearer types field of HTTP datagram header in described access request, identify described terminal type;
When the type of judging access request is real time streaming transport protocol RTSP data message, according to the parameters field in described access request or Directory Type field, identify described terminal type.
5. a service node device, is characterized in that, comprising:
Receiver module, for receiving the first media content access request sent by terminal;
Identification module, for identifying the type of described terminal;
Modular converter, for according to the media content configuration information, carry out the multi-format conversion by each original media content of content distributing network CDN content center transmission, generates each media content;
Memory module, for storing described each media content after described modular converter is changed, and described CDN content center is carried out described each original media content according to the media content configuration information described each media content forwarded after the multi-format conversion;
Matching module, type for the described terminal that identifies according to described identification module, in described each media content from described memory module, match the second media content of the type matching of media content and media formats and described terminal consistent with described the first media content;
Sending module, for sending to described terminal by described the second media content.
6. service node device as claimed in claim 5, it is characterized in that, described modular converter, specifically for media parameter information corresponding to media form in the media content configuration information according to being issued by network management and control center, described each original media content is carried out to the multi-format conversion, generate respectively the media content of corresponding form, described media parameter information comprises one of following parameter or combination in any:
Media code rate by utilizing, resolution, file format.
7. service node device as described as claim 5 or 6, is characterized in that, described identification module, specifically for the type of the access request that judges acquisition request the first media content that described terminal sends;
When the type of judging is the HTTP data message, according to user agent's field or the bearer types field of HTTP datagram header in described access request, identify described terminal type;
When the type of judging is real time streaming transport protocol RTSP data message, according to the parameters field in described access request or Directory Type field, identify described terminal type.
8. a CDN content center equipment, is characterized in that, comprising:
Modular converter, for according to the media content configuration information, carry out the multi-format conversion by each original media content, generates each media content;
Sending module, for sending to service node by described each media content.
9. CDN content center equipment as claimed in claim 8, it is characterized in that, described modular converter, specifically for media parameter information corresponding to media form in the media content configuration information according to being issued by network management and control center, described each original media content is carried out to the multi-format conversion, generate respectively the media content of corresponding form, described media parameter information comprises one of following parameter or combination in any:
Media code rate by utilizing, resolution, file format.
10. a multimedia content distribution system, is characterized in that, comprising: described at least one content distributing network CDN content center, and with a plurality of service nodes that are connected with each described CDN content center,
Described CDN content center, for according to the media content configuration information, carry out the multi-format conversion by each original media content, generates each media content, and be transmitted to described service node;
Described service node, be stored in this locality for described each media content that described CDN content center is forwarded, perhaps for according to described media content configuration information, described each original media content that described CDN content center is forwarded is carried out the multi-format conversion, generates described each media content and is stored in this locality; And for receiving the access request of acquisition request the first media content sent by terminal, identify the type of described terminal, and according to the type of the described terminal identified, from described each media content that preserve this locality, match media content and media formats and described terminal consistent with described the first media content type matching the second media content and return to described terminal.
11. system as claimed in claim 10, is characterized in that, also comprises:
Network management and control center, for issuing described media content configuration information to described CDN content center or described service node.
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