CN107770130A - A kind of content of multimedia acquisition methods and device - Google Patents
A kind of content of multimedia acquisition methods and device Download PDFInfo
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- CN107770130A CN107770130A CN201610681077.9A CN201610681077A CN107770130A CN 107770130 A CN107770130 A CN 107770130A CN 201610681077 A CN201610681077 A CN 201610681077A CN 107770130 A CN107770130 A CN 107770130A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
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- Computer Security & Cryptography (AREA)
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Abstract
The embodiments of the invention provide a kind of content of multimedia acquisition methods and device, applied to terminal device, methods described includes：After the acquisition authority of any rate content of multimedia has been obtained, to server send the rate content of multimedia corresponding to media representation describe MPD and obtain request, and run default exchange algorithm, with the server consult to obtain this be connected corresponding to key；The MPD file that the server is sent is received, and obtains the time code included in the MPD file；Predetermined encryption algorithm is run, obtains each multimedia slicing title successively；The fragment request for including each multimedia slicing title is sent to the server successively, and receives index burst and multimedia slicing that the server is sent；Wherein, the index burst is encrypted using the key.The embodiment of the present invention can protect the safety of rate content of multimedia.
Description
Technical field
The present invention relates to multi-media processing technical field, more particularly to a kind of content of multimedia acquisition methods and device.
Background technology
DASH (Dynamic Adaptive Streaming over HTTP, the dynamic self-adapting Streaming Media based on HTTP
Agreement) it is a kind of streaming media self-adapting transmission technology.When terminal device applies the technical limit spacing content of multimedia, especially in nothing
When content of multimedia is obtained under thread environment, the parameters such as downloading rate can be adaptively adjusted according to current bandwidth, improve user
Experience.Therefore, it has more preferable transporting, compatibility and scalability, possesses more wide market and application prospect.
The operation workflow of conventional DASH stream media technologys is such：Server obtains content of multimedia and marked according to the world
Standard is packaged into the data of DASH agreement specified formats, while MPD (Media Presentation corresponding to generation
Description, media representation description) file, describe in MPD file the coded system of content of multimedia, multimedia duration,
The information such as multiple media types, code check, URL (Uniform Resource Locator, URL).
Terminal device obtains request from server acquisition MPD file by sending MPD, parses and simultaneously combines code check decision-making technique
Select suitable code check.And then fragment request is sent to server, multimedia slicing is asked, finally by the multimedia slicing of acquisition
Played in locally decoding.
But for the content of multimedia of rate class, when terminal device obtains the acquisition power of any rate content of multimedia
After limit, when terminal device is to server transmission fragment request, the request may be intercepted and captured by other-end equipment；Or server
When corresponding multimedia slicing is sent into terminal device, the multimedia slicing be able to may also be intercepted and captured by other-end equipment.Cause
How this, protect the safety of rate content of multimedia, is a urgent problem to be solved.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of content of multimedia acquisition methods and device, to protect the more matchmakers of rate
The safety held in vivo.Concrete technical scheme is as follows：
In a first aspect, the embodiments of the invention provide a kind of content of multimedia acquisition methods, it is described applied to terminal device
Method includes：
After the acquisition authority of any rate content of multimedia has been obtained, the rate content of multimedia pair is sent to server
The media representation answered describes MPD and obtains request, and runs default exchange algorithm, consults to obtain this being connected institute with the server
Corresponding key；
The MPD file that the server is sent is received, and obtains the time code included in the MPD file；
Predetermined encryption algorithm is run, obtains each multimedia slicing title successively；Wherein, the multimedia slicing obtained for the first time
Title is according to obtained by the key and the time code, and other multimedia slicing titles are according to the key and last
Obtained by the multimedia slicing title arrived；
The fragment request for including each multimedia slicing title is sent to the server successively, and receives the server hair
The index burst and multimedia slicing sent；Wherein, the index burst is encrypted using the key；Preserved in the server
There is the corresponding relation of each multimedia slicing title and each multimedia slicing, each multimedia slicing title is the server according to institute
State what key, the time code and the predetermined encryption algorithm obtained.
Alternatively, it is described after the acquisition authority of any rate content of multimedia has been obtained, send the rate to server
Before media representation corresponding to content of multimedia describes MPD acquisition requests, methods described also includes：
The multimedia slicing for the predetermined number that the server is sent is received, and shows the multimedia slicing.
Alternatively, the default exchange algorithm is the graceful DH Diffie-Hellman of diffie-hellman；The predetermined encryption algorithm is
DES Cipher AES.
Second aspect, the embodiments of the invention provide a kind of content of multimedia acquisition methods, applied to server, the side
Method includes：
The media representation that receiving terminal apparatus is sent describes MPD and obtains request, when being asked as the terminal device
When obtaining the rate content of multimedia for obtaining authority, default exchange algorithm is run, consults to obtain this company with the terminal device
Connect corresponding key；
The MPD file for including time code is sent to the terminal device；
Predetermined encryption algorithm is run, obtains each multimedia slicing title successively；Wherein, the multimedia slicing obtained for the first time
Title is according to obtained by the key and the time code, and other multimedia slicing titles are according to the key and last
Obtained by the multimedia slicing title arrived；
The corresponding relation of each multimedia slicing title and each multimedia slicing is built, receives the bag that the terminal device is sent
The fragment request of the title containing multimedia slicing, and send corresponding index burst and multimedia slicing to the terminal device；Its
In, the index burst is encrypted using the key.
Alternatively, before the media representation that the receiving terminal apparatus is sent describes MPD acquisition requests, methods described is also wrapped
Include：
The multimedia slicing of predetermined number is sent to the terminal device.
Alternatively, the fragment request for including multimedia slicing title for receiving the terminal device and sending, and successively
Sending corresponding index burst and multimedia slicing to the terminal device includes：
The fragment request for including multimedia slicing title that the terminal device is sent is received, and it is each according to what is locally preserved
Terminal Equipment Identifier and the corresponding relation for having sent multimedia slicing title, it is determined that described in being transmitted across to the terminal device
The part multimedia slicing of rate content of multimedia, and it is more to send the rate not being sent to the terminal device successively
The multimedia slicing of media content.
Alternatively, the default exchange algorithm is the graceful DH Diffie-Hellman of diffie-hellman；The predetermined encryption algorithm is
DES Cipher AES.
The third aspect, it is described applied to terminal device the embodiments of the invention provide a kind of content of multimedia acquisition device
Device includes：
Execution module, for after the acquisition authority of any rate content of multimedia has been obtained, the money to be sent to server
Media representation corresponding to expense content of multimedia describes MPD and obtains request, and runs default exchange algorithm, consults with the server
Obtain the corresponding key of this connection；
Receiving module, the MPD file sent for receiving the server, and obtain included in the MPD file when
Imitate code；
Module is run, for running predetermined encryption algorithm, obtains each multimedia slicing title successively；Wherein, for the first time
To multimedia slicing title be according to obtained by the key and the time code, other multimedia slicing titles are according to
Obtained by key and last obtained multimedia slicing title；
Processing module, for sending the fragment request for including each multimedia slicing title to the server successively, and connect
Receive index burst and multimedia slicing that the server is sent；Wherein, the index burst is encrypted using the key；Institute
The corresponding relation that each multimedia slicing title and each multimedia slicing are preserved in server is stated, each multimedia slicing title is institute
State what server obtained according to the key, the time code and the predetermined encryption algorithm.
Alternatively, described device also includes：
Display module, the multimedia slicing of the predetermined number sent for receiving the server, and show the multimedia
Burst.
Alternatively, the default exchange algorithm is the graceful DH Diffie-Hellman of diffie-hellman；The predetermined encryption algorithm is
DES Cipher AES.
Fourth aspect, the embodiments of the invention provide a kind of content of multimedia acquisition device, applied to server, the dress
Put including：
Receiving module, the media representation sent for receiving terminal apparatus describes MPD and obtains request, when being asked as institute
When stating terminal device and having obtained the rate content of multimedia for obtaining authority, default exchange algorithm is run, is assisted with the terminal device
Business obtains the corresponding key of this connection；
First sending module, for sending the MPD file for including time code to the terminal device；
Module is run, for running predetermined encryption algorithm, obtains each multimedia slicing title successively；Wherein, for the first time
To multimedia slicing title be according to obtained by the key and the time code, other multimedia slicing titles are according to
Obtained by key and last obtained multimedia slicing title；
Processing module, for building the corresponding relation of each multimedia slicing title and each multimedia slicing, receive the end
End equipment send the fragment request for include multimedia slicing title, and to the terminal device send corresponding to index burst with
Multimedia slicing；Wherein, the index burst is encrypted using the key.
Alternatively, described device also includes：
Second sending module, for sending the multimedia slicing of predetermined number to the terminal device.
Alternatively, the processing module, each multimedia slicing name is included specifically for what the reception terminal device was sent
The fragment request of title, and according to each Terminal Equipment Identifier for locally preserving and the corresponding relation for having sent multimedia slicing title,
It is determined that the part multimedia slicing for the rate content of multimedia being transmitted across to the terminal device, and successively to the end
End equipment sends the multimedia slicing for the rate content of multimedia not being sent to.
Alternatively, the default exchange algorithm is the graceful DH Diffie-Hellman of diffie-hellman；The predetermined encryption algorithm is
DES Cipher AES.
The embodiments of the invention provide a kind of content of multimedia acquisition methods and device, when terminal device and server are established
During connection, terminal device can consult to obtain this with server and be connected corresponding key, also, when server can determine
Effect code is simultaneously sent to terminal device by MPD file, and then terminal device can run default add according to the key and time code
Close algorithm obtains each multimedia slicing title.Also, server can also run the predetermined encryption according to the key and time code
Algorithm obtains each multimedia slicing title, and builds the corresponding relation of each multimedia slicing title and each multimedia slicing.Therefore,
Terminal device can send the fragment request for including each multimedia slicing title to server, and obtain the correspondence of server transmission
Index burst and multimedia slicing.
Because key and time code only have the server and the terminal device can be known, each multimedia slicing title is also only
There are the server and the terminal device to be calculated, and the key is only effective during locality connection, therefore, only should
Terminal device can obtain corresponding multimedia slicing by each multimedia slicing title.Even if other-end has been intercepted and captured each more
Media slicing title, when it sends fragment request to server, server can renegotiate key with the terminal device, without
Directly multimedia slicing can be sent to the terminal device.When the index burst and multimedia slicing that server is sent to terminal device
When being intercepted and captured by other-end equipment, due to index burst be encrypted, the terminal device can not normal presentation content of multimedia,
Therefore, it is possible to protect the safety of rate content of multimedia.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow chart of content of multimedia acquisition methods provided in an embodiment of the present invention；
Fig. 2 is another flow chart of content of multimedia acquisition methods provided in an embodiment of the present invention；
Fig. 3 is the structural representation of content of multimedia acquisition device provided in an embodiment of the present invention；
Fig. 4 is another structural representation of content of multimedia acquisition device provided in an embodiment of the present invention.
Embodiment
In order to protect the safety of rate content of multimedia, the embodiments of the invention provide a kind of content of multimedia acquisition methods
And device.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order to protect the safety of rate content of multimedia, the embodiments of the invention provide a kind of content of multimedia acquisition methods
Process, as shown in figure 1, the process may comprise steps of：
S101, after the acquisition authority of any rate content of multimedia has been obtained, the rate multimedia is sent to server
Media representation corresponding to content describes MPD and obtains request, and runs default exchange algorithm, consults to obtain this with the server
The corresponding key of connection.
Method provided in an embodiment of the present invention can apply to terminal device.Specifically, the terminal device can be desk-top
Computer, portable computer, intelligent mobile terminal etc..
In embodiments of the present invention, terminal device can obtain the acquisition authority of any rate content of multimedia.For example, eventually
End equipment can pay the expense of the rate content of multimedia by Third-party payment platform, and then obtain the content of multimedia
Acquisition authority.
After the acquisition authority of any rate content of multimedia is obtained, terminal device can ask the money with and then to server
Take content of multimedia.Specifically, terminal device the rate content of multimedia can be sent to server corresponding to media representation retouch
State MPD and obtain request, to obtain MPD file.
In embodiments of the present invention, in order to protect the safety of rate content of multimedia, terminal device sends MPD to server
After obtaining request, default exchange algorithm can be run, with server consult to obtain this be connected corresponding to key.The key can
Think 16 or 32.
Wherein, above-mentioned preset algorithm can be DH (Diffie-Hellman, diffie-hellman are graceful) Diffie-Hellman.DH
It is a kind of security protocol, it can allow both sides to be built under conditions of any information in advance of completely no other side by insecure channels
Erect a key.
It should be noted that terminal device and server obtain key corresponding to this connection by presetting exchange algorithm
Process, any method in the prior art can also be used, the embodiment of the present invention is to this process without limiting.
S102, the MPD file that the server is sent is received, and obtain the time code included in the MPD file.
Request is obtained when terminal device sends MPD to server, and is consulted after obtaining key, terminal device can receive
The MPD file that server is sent, and obtain the time code included in the MPD file.
In embodiments of the present invention, when server is to terminal device transmission MPD file, when can be added in MPD file
Imitate code.For example, server can be according to default rule, and the random code of one predetermined figure of generation, such as 16,32, and
As time code addition in MPD file.Wherein, the time code can be added in the aging-code fields of MPD file.
In one implementation, server can use same time code always.Or in another implementation
In, in order to improve the security of content of multimedia, prevent from being intercepted and captured by other-end equipment in MPD file transmission process, server
Same time code can be used within a period of time, such as 2 hours, 3 hours, 5 hours, after this period, then is changed another
One time code.
Therefore, after terminal device receives the MPD file of server transmission, the time code wherein included can be obtained, with
For follow-up cryptographic calculation.
S103, predetermined encryption algorithm is run, obtains each multimedia slicing title successively；Wherein, the more matchmakers obtained for the first time
Body burst title is according to obtained by the key and the time code, and other multimedia slicing titles are according to the key and upper
Obtained by the multimedia slicing title once obtained.
Terminal device obtains the key consulted with server, and after the time code included in MPD file, can run pre-
If AES, each multimedia slicing title is obtained successively.Wherein, the multimedia slicing title obtained for the first time is according to
Obtained by key and the time code, other multimedia slicing titles are according to the key and last obtained multimedia slicing
Obtained by title.
Wherein, above-mentioned predetermined encryption algorithm can be DES (Data Encryption Standard, data encryption standards)
AES.
For example, when the key that terminal device and server are consulted to obtain is K, the time code got from MPD file is A
When, it can run des encryption algorithm according to key K and time code A, obtain result B, and using B as first multimedia point
Piece title.And then can run des encryption algorithm according to key K and first multimedia slicing title B, obtain result C, will
C is as second multimedia slicing title.The rest may be inferred, obtains multimedia slicing title below successively.
It should be noted that terminal device runs predetermined encryption algorithm, the process of each multimedia slicing title is obtained, may be used also
To use existing any method, the embodiment of the present invention is to this process without limiting.
S104, the fragment request for including each multimedia slicing title is sent to the server successively, and receive the clothes
The index burst and multimedia slicing that business device is sent；Wherein, the index burst is encrypted using the key；The server
In preserve the corresponding relation of each multimedia slicing title and each multimedia slicing, each multimedia slicing title is the server
Obtained according to the key, the time code and the predetermined encryption algorithm.
In embodiments of the present invention, when it is determined that after key and time code, server can also run identical with terminal device
Predetermined encryption algorithm, obtain each multimedia slicing title.Also, each multimedia slicing title and each multimedia can also be preserved
The corresponding relation of burst.Wherein, the multimedia slicing title obtained for the first time be according to obtained by the key and the time code,
Other multimedia slicing titles are according to obtained by the key and last obtained multimedia slicing title.
It should be noted that each multimedia slicing title and the corresponding relation of each multimedia slicing that server preserves, only
During locality connection effectively.After terminal device and server reconnection, terminal device needs renegotiate close with server
Each multimedia slicing title is calculated according to time code and predetermined encryption algorithm in key, new root of laying equal stress on.And then it can preserve again
Each multimedia slicing title and the corresponding relation of each multimedia slicing.
After terminal device obtains each multimedia slicing title, it can be sent to server comprising each multimedia slicing title
Fragment request., can be according to each multimedia slicing locally preserved after server receives the fragment request of terminal device transmission
Request and multimedia slicing corresponding relation, terminal device is sent to by corresponding multimedia slicing.
Such as, server can be according to the multimedia slicing title included in fragment request, the identical more matchmakers that will locally preserve
The multimedia slicing of body burst title is sent to terminal device.Alternatively, when server does not find what is included in fragment request
During multimedia slicing title, it can abandon the fragment request, and it is not dealt with, and disconnect the connection with terminal device.
Also,, can when server is to terminal device transmission multimedia slicing in order to protect the safety of rate content of multimedia
To add index burst before each multimedia slicing, and index burst is carried out using with the key that terminal device is consulted to obtain
Encryption.Burst is indexed by adding, and index burst is encrypted, must when terminal device wants to obtain multimedia slicing
First index burst must be decrypted, and then can just get multimedia slicing, therefore, it is possible to protect the peace of multimedia slicing
Entirely.
The index burst and multimedia slicing that terminal device can be sent with the reception server, with according to each multimedia slicing exhibition
Show rate content of multimedia.
The embodiments of the invention provide a kind of content of multimedia acquisition methods, when terminal device and server are established and connected
When, terminal device can consult to obtain this with server and be connected corresponding key, also, server can determine time code
And terminal device is sent to by MPD file, and then terminal device can run predetermined encryption and calculate according to the key and time code
Method obtains each multimedia slicing title.Also, server can also run the predetermined encryption algorithm according to the key and time code
Each multimedia slicing title is obtained, and builds the corresponding relation of each multimedia slicing title and each multimedia slicing.Therefore, terminal
Equipment can send the fragment request for including each multimedia slicing title to server, and obtain the corresponding rope of server transmission
Draw burst and multimedia slicing.
Because key and time code only have the server and the terminal device can be known, each multimedia slicing title is also only
There are the server and the terminal device to be calculated, and the key is only effective during locality connection, therefore, only should
Terminal device can obtain corresponding multimedia slicing by each multimedia slicing title.Even if other-end has been intercepted and captured each more
Media slicing title, when it sends fragment request to server, server can renegotiate key with the terminal device, without
Directly multimedia slicing can be sent to the terminal device.When the index burst and multimedia slicing that server is sent to terminal device
When being intercepted and captured by other-end equipment, due to index burst be encrypted, the terminal device can not normal presentation content of multimedia,
Therefore, it is possible to protect the safety of rate content of multimedia.
As a kind of embodiment of the embodiment of the present invention, the acquisition authority of rate content of multimedia is obtained in terminal device
Before, the multimedia slicing of the predetermined number of the rate content of multimedia can be sent to terminal device by server.Such as, can be with
First multimedia slicing, the first two multimedia slicing etc. are sent, so that the multimedia point that terminal device displaying server is sent
Piece, for user's preview, user further may determine whether to pay, and to obtain the acquisition authority of the content of multimedia, carry
High Consumer's Experience.
As shown in Fig. 2 a kind of content of multimedia acquisition methods process provided in an embodiment of the present invention, applied to server,
The process may comprise steps of：
S201, the media representation that receiving terminal apparatus is sent describes MPD and obtains request, when being asked to set for the terminal
During for having obtained the rate content of multimedia for obtaining authority, default exchange algorithm is run, consulting to obtain this with the terminal device
Key corresponding to secondary connection.
In embodiments of the present invention, terminal device can obtain the acquisition authority of any rate content of multimedia.For example, eventually
End equipment can pay the expense of the rate content of multimedia by Third-party payment platform, and then obtain the content of multimedia
Acquisition authority.
After the acquisition authority of any rate content of multimedia is obtained, terminal device can ask the money with and then to server
Take content of multimedia.Specifically, terminal device the rate content of multimedia can be sent to server corresponding to media representation retouch
State MPD and obtain request, to obtain MPD file.
Therefore, the MPD that server can be sent with receiving terminal apparatus obtains request.And it is possible to judge asked money
Whether expense content of multimedia is that the terminal device has obtained the rate content of multimedia for obtaining authority.For example, server can lead to
Encapsulated layer is crossed to judge whether the terminal device has obtained the acquisition authority of the rate content of multimedia.
After it is determined that the terminal device obtains the acquisition authority of the rate content of multimedia, in order to protect in rate multimedia
The safety of appearance, server can run default exchange algorithm, and consulting to obtain this with the terminal device is connected corresponding key.
The key can be 16 or 32.
Wherein, above-mentioned preset algorithm can be DH (Diffie-Hellman, diffie-hellman are graceful) Diffie-Hellman.DH
It is a kind of security protocol, it can allow both sides to be built under conditions of any information in advance of completely no other side by insecure channels
Erect a key.
It should be noted that terminal device and server obtain key corresponding to this connection by presetting exchange algorithm
Process, any method in the prior art can also be used, the embodiment of the present invention is to this process without limiting.
S202, the MPD file for including time code is sent to the terminal device.
In embodiments of the present invention, server can send MPD file to terminal device.Also, can also be in MPD file
Middle addition time code.For example, server can according to default rule, generate a predetermined figure random code, such as 16,32
Position etc., and as time code addition in MPD file.Wherein, the time code can add the aging-code words in MPD file
Duan Zhong.
In one implementation, server can use same time code always.Or in another implementation
In, in order to improve the security of content of multimedia, prevent from being intercepted and captured by other-end equipment in MPD file transmission process, server
Same time code can be used within a period of time, such as 2 hours, 3 hours, 5 hours, after this period, then is changed another
One time code.
S203, predetermined encryption algorithm is run, obtains each multimedia slicing title successively；Wherein, the more matchmakers obtained for the first time
Body burst title is according to obtained by the key and the time code, and other multimedia slicing titles are according to the key and upper
Obtained by the multimedia slicing title once obtained.
In embodiments of the present invention, server can run predetermined encryption algorithm, obtain each multimedia slicing title successively.
Wherein, the multimedia slicing title obtained for the first time is other multimedia slicings according to obtained by the key and the time code
Title is according to obtained by the key and last obtained multimedia slicing title.
Wherein, above-mentioned predetermined encryption algorithm can be DES (Data Encryption Standard, data encryption standards)
AES.
For example, when the key that server and terminal device are consulted to obtain is K, it is determined that time code when being A, it can basis
Key K and time code A, des encryption algorithm is run, obtains result B, and using B as first multimedia slicing title.And then
It can run des encryption algorithm according to key K and first multimedia slicing title B, result C obtained, using C as second
Multimedia slicing title.The rest may be inferred, obtains multimedia slicing title below successively.
It should be noted that server runs predetermined encryption algorithm, the process of each multimedia slicing title is obtained, can be with
Using existing any method, the embodiment of the present invention is to this process without limiting.
It should be noted that each multimedia slicing title and the corresponding relation of each multimedia slicing that server preserves, only
During locality connection effectively.After terminal device and server reconnection, terminal device needs renegotiate close with server
Each multimedia slicing title is calculated according to time code and predetermined encryption algorithm in key, new root of laying equal stress on.And then it can preserve again
Each multimedia slicing title and the corresponding relation of each multimedia slicing.
S204, the corresponding relation of each multimedia slicing title and each multimedia slicing is built, receive the terminal device hair
That send includes the fragment request of multimedia slicing title, and sends corresponding index burst and multimedia point to the terminal device
Piece；Wherein, the index burst is encrypted using the key.
After obtaining each multimedia slicing title, server can build each multimedia slicing title and each multimedia slicing
Corresponding relation.For example, server can be corresponding with first multimedia slicing by first multimedia slicing title B, by second
Individual multimedia slicing title C is corresponding with second multimedia slicing.
The fragment request that server can be sent with receiving terminal apparatus, the fragment request include any multimedia slicing name
Claim., will be corresponding and then server can be according to each multimedia slicing request locally preserved and multimedia slicing corresponding relation
Multimedia slicing is sent to terminal device.
Such as, server can be according to the multimedia slicing title included in fragment request, the identical more matchmakers that will locally preserve
The multimedia slicing of body burst title is sent to terminal device.Alternatively, when server does not find what is included in fragment request
During multimedia slicing title, it can abandon the fragment request, and it is not dealt with, and disconnect the connection with terminal device.
Also,, can when server is to terminal device transmission multimedia slicing in order to protect the safety of rate content of multimedia
To add index burst before each multimedia slicing, and index burst is carried out using with the key that terminal device is consulted to obtain
Encryption.
Burst is indexed by adding, and index burst is encrypted, when terminal device wants to obtain multimedia slicing,
First index burst must be decrypted, and then can just get multimedia slicing, therefore, it is possible to protect multimedia slicing
Safety.
The embodiments of the invention provide a kind of content of multimedia acquisition methods, when terminal device and server are established and connected
When, terminal device can consult to obtain this with server and be connected corresponding key, also, server can determine time code
And terminal device is sent to by MPD file, and then terminal device can run predetermined encryption and calculate according to the key and time code
Method obtains each multimedia slicing title.Also, server can also run the predetermined encryption algorithm according to the key and time code
Each multimedia slicing title is obtained, and builds the corresponding relation of each multimedia slicing title and each multimedia slicing.Therefore, terminal
Equipment can send the fragment request for including each multimedia slicing title to server, and obtain the corresponding rope of server transmission
Draw burst and multimedia slicing.
Because key and time code only have the server and the terminal device can be known, each multimedia slicing title is also only
There are the server and the terminal device to be calculated, and the key is only effective during locality connection, therefore, only should
Terminal device can obtain corresponding multimedia slicing by each multimedia slicing title.Even if other-end has been intercepted and captured each more
Media slicing title, when it sends fragment request to server, server can renegotiate key with the terminal device, without
Directly multimedia slicing can be sent to the terminal device.When the index burst and multimedia slicing that server is sent to terminal device
When being intercepted and captured by other-end equipment, due to index burst be encrypted, the terminal device can not normal presentation content of multimedia,
Therefore, it is possible to protect the safety of rate content of multimedia.
As a kind of embodiment of the embodiment of the present invention, before the MPD requests of terminal device transmission are received, service
The multimedia slicing of the predetermined number of the rate content of multimedia can be sent to terminal device by device.Such as, first can be sent
Individual multimedia slicing, the first two multimedia slicing etc., so that the multimedia slicing that terminal device displaying server is sent, for user
Preview, user further may determine whether to pay, and to obtain the acquisition authority of the content of multimedia, improve user's body
Test.
As a kind of embodiment of the embodiment of the present invention, in some cases, rate content of multimedia is generally relatively more, when
Longer, user, which watches complete rate content of multimedia, to be needed to spend longer time.In this case, user may divide
Repeatedly watch complete rate content of multimedia.Also, when user have viewed part rate content of multimedia, next time beats again
When opening, its place that may wish to see from last time continues to watch.
Therefore, server can be in the corresponding pass for locally recording each Terminal Equipment Identifier with having sent multimedia slicing title
System.Above-mentioned Terminal Equipment Identifier can be device number, or cell-phone number used in user's registration etc..
, can be according to this when server receives the fragment request comprising multimedia slicing title of terminal device transmission
Each Terminal Equipment Identifier that ground preserves and the corresponding relation for having sent multimedia slicing title, it is determined that being sent to the terminal device
The part multimedia slicing crossed, and the multimedia slicing not being sent to is sent to the terminal device successively.It is thus possible to continue
Its content of multimedia do not watched is shown to user, avoids repeating playing, improves Consumer's Experience.
Corresponding to above method embodiment, the embodiment of the present invention additionally provides corresponding device embodiment.
Fig. 3 is a kind of content of multimedia acquisition device provided in an embodiment of the present invention, applied to terminal device, described device
Including：
Execution module 310, for after the acquisition authority of any rate content of multimedia has been obtained, being sent to server should
Media representation corresponding to rate content of multimedia describes MPD and obtains request, and runs default exchange algorithm, is assisted with the server
Business obtains the corresponding key of this connection；
Receiving module 320, the MPD file sent for receiving the server, and obtain what is included in the MPD file
Time code；
Module 330 is run, for running predetermined encryption algorithm, obtains each multimedia slicing title successively；Wherein, for the first time
Obtained multimedia slicing title is that other multimedia slicing titles are according to institute according to obtained by the key and the time code
State obtained by key and last obtained multimedia slicing title；
Processing module 340, for sending the fragment request for including each multimedia slicing title to the server successively, and
Receive index burst and multimedia slicing that the server is sent；Wherein, the index burst is encrypted using the key；
The corresponding relation of each multimedia slicing title and each multimedia slicing is preserved in the server, each multimedia slicing title is
The server obtains according to the key, the time code and the predetermined encryption algorithm.
The embodiments of the invention provide a kind of content of multimedia acquisition device, when terminal device and server are established and connected
When, terminal device can consult to obtain this with server and be connected corresponding key, also, server can determine time code
And terminal device is sent to by MPD file, and then terminal device can run predetermined encryption and calculate according to the key and time code
Method obtains each multimedia slicing title.Also, server can also run the predetermined encryption algorithm according to the key and time code
Each multimedia slicing title is obtained, and builds the corresponding relation of each multimedia slicing title and each multimedia slicing.Therefore, terminal
Equipment can send the fragment request for including each multimedia slicing title to server, and obtain the corresponding rope of server transmission
Draw burst and multimedia slicing.
Because key and time code only have the server and the terminal device can be known, each multimedia slicing title is also only
There are the server and the terminal device to be calculated, and the key is only effective during locality connection, therefore, only should
Terminal device can obtain corresponding multimedia slicing by each multimedia slicing title.Even if other-end has been intercepted and captured each more
Media slicing title, when it sends fragment request to server, server can renegotiate key with the terminal device, without
Directly multimedia slicing can be sent to the terminal device.When the index burst and multimedia slicing that server is sent to terminal device
When being intercepted and captured by other-end equipment, due to index burst be encrypted, the terminal device can not normal presentation content of multimedia,
Therefore, it is possible to protect the safety of rate content of multimedia.
As a kind of embodiment of the embodiment of the present invention, described device also includes：
Display module (not shown), the multimedia slicing of the predetermined number sent for receiving the server, and
Show the multimedia slicing.
As a kind of embodiment of the embodiment of the present invention, the default exchange algorithm is that the graceful DH keys of diffie-hellman are handed over
Scaling method；The predetermined encryption algorithm is DES Cipher AES.
As shown in figure 4, it illustrates a kind of content of multimedia acquisition device provided in an embodiment of the present invention, applied to service
Device, described device include：
Receiving module 410, the media representation sent for receiving terminal apparatus describes MPD and obtains request, when what is asked
When having obtained the rate content of multimedia for obtaining authority for the terminal device, default exchange algorithm is run, is set with the terminal
It is standby to consult to obtain the corresponding key of this connection；
First sending module 420, for sending the MPD file for including time code to the terminal device；
Module 430 is run, for running predetermined encryption algorithm, obtains each multimedia slicing title successively；Wherein, for the first time
Obtained multimedia slicing title is that other multimedia slicing titles are according to institute according to obtained by the key and the time code
State obtained by key and last obtained multimedia slicing title；
Processing module 440, for building the corresponding relation of each multimedia slicing title and each multimedia slicing, described in reception
The fragment request for including multimedia slicing title that terminal device is sent, and send corresponding index burst to the terminal device
And multimedia slicing；Wherein, the index burst is encrypted using the key.
The embodiments of the invention provide a kind of content of multimedia acquisition device, when terminal device and server are established and connected
When, terminal device can consult to obtain this with server and be connected corresponding key, also, server can determine time code
And terminal device is sent to by MPD file, and then terminal device can run predetermined encryption and calculate according to the key and time code
Method obtains each multimedia slicing title.Also, server can also run the predetermined encryption algorithm according to the key and time code
Each multimedia slicing title is obtained, and builds the corresponding relation of each multimedia slicing title and each multimedia slicing.Therefore, terminal
Equipment can send the fragment request for including each multimedia slicing title to server, and obtain the corresponding rope of server transmission
Draw burst and multimedia slicing.
Because key and time code only have the server and the terminal device can be known, each multimedia slicing title is also only
There are the server and the terminal device to be calculated, and the key is only effective during locality connection, therefore, only should
Terminal device can obtain corresponding multimedia slicing by each multimedia slicing title.Even if other-end has been intercepted and captured each more
Media slicing title, when it sends fragment request to server, server can renegotiate key with the terminal device, without
Directly multimedia slicing can be sent to the terminal device.When the index burst and multimedia slicing that server is sent to terminal device
When being intercepted and captured by other-end equipment, due to index burst be encrypted, the terminal device can not normal presentation content of multimedia,
Therefore, it is possible to protect the safety of rate content of multimedia.
As a kind of embodiment of the embodiment of the present invention, described device also includes：
Second sending module (not shown), for sending the multimedia slicing of predetermined number to the terminal device.
As a kind of embodiment of the embodiment of the present invention, the processing module 440, set specifically for receiving the terminal
The fragment request for including each multimedia slicing title that preparation is sent, and according to each Terminal Equipment Identifier locally preserved with having sent
The corresponding relation of multimedia slicing title, it is determined that the part for the rate content of multimedia being transmitted across to the terminal device
Multimedia slicing, and the multimedia point for the rate content of multimedia not being sent to is sent to the terminal device successively
Piece.
As a kind of embodiment of the embodiment of the present invention, the default exchange algorithm is that the graceful DH keys of diffie-hellman are handed over
Scaling method；The predetermined encryption algorithm is DES Cipher AES.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, it is related
Part illustrates referring to the part of embodiment of the method.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
Each embodiment in this specification is described by the way of related, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.It is real especially for system
For applying example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to embodiment of the method
Part explanation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (14)
1. a kind of content of multimedia acquisition methods, it is characterised in that applied to terminal device, methods described includes：
After the acquisition authority of any rate content of multimedia has been obtained, sent to server corresponding to the rate content of multimedia
Media representation describes MPD and obtains request, and runs default exchange algorithm, consults to obtain corresponding to this is connected with the server
Key；
The MPD file that the server is sent is received, and obtains the time code included in the MPD file；
Predetermined encryption algorithm is run, obtains each multimedia slicing title successively；Wherein, the multimedia slicing title obtained for the first time
It is according to obtained by the key and the time code, other multimedia slicing titles obtain according to the key and last time
Obtained by multimedia slicing title；
The fragment request for including each multimedia slicing title is sent to the server successively, and receives what the server was sent
Index burst and multimedia slicing；Wherein, the index burst is encrypted using the key；Preserved in the server each
Multimedia slicing title and the corresponding relation of each multimedia slicing, each multimedia slicing title is the server according to described close
What key, the time code and the predetermined encryption algorithm obtained.
2. according to the method for claim 1, it is characterised in that the acquisition that any rate content of multimedia ought have been obtained
After authority, to server send the rate content of multimedia corresponding to media representation describe MPD obtain request before, methods described
Also include：
The multimedia slicing for the predetermined number that the server is sent is received, and shows the multimedia slicing.
3. method according to claim 1 or 2, it is characterised in that the default exchange algorithm is that the graceful DH of diffie-hellman is close
Key exchange algorithm；The predetermined encryption algorithm is DES Cipher AES.
4. a kind of content of multimedia acquisition methods, it is characterised in that applied to server, methods described includes：
The media representation that receiving terminal apparatus is sent describes MPD and obtains request, when being asked to have obtained for the terminal device
When obtaining the rate content of multimedia of authority, default exchange algorithm is run, consults to obtain this being connected institute with the terminal device
Corresponding key；
The MPD file for including time code is sent to the terminal device；
Predetermined encryption algorithm is run, obtains each multimedia slicing title successively；Wherein, the multimedia slicing title obtained for the first time
It is according to obtained by the key and the time code, other multimedia slicing titles obtain according to the key and last time
Obtained by multimedia slicing title；
The corresponding relation of each multimedia slicing title and each multimedia slicing is built, it is more to receive including for the terminal device transmission
The fragment request of media slicing title, and send corresponding index burst and multimedia slicing to the terminal device；Wherein, institute
Index burst is stated to encrypt using the key.
5. according to the method for claim 4, it is characterised in that the media representation description that the receiving terminal apparatus is sent
Before MPD obtains request, methods described also includes：
The multimedia slicing of predetermined number is sent to the terminal device.
6. according to the method for claim 4, it is characterised in that what the reception terminal device was sent includes multimedia
The fragment request of burst title, and include successively to index burst and multimedia slicing corresponding to terminal device transmission：
The fragment request for including multimedia slicing title that the terminal device is sent is received, and according to each terminal locally preserved
Device identification and the corresponding relation for having sent multimedia slicing title, it is determined that the rate being transmitted across to the terminal device
The part multimedia slicing of content of multimedia, and the rate multimedia not being sent to is sent to the terminal device successively
The multimedia slicing of content.
7. according to the method described in claim any one of 4-6, it is characterised in that the default exchange algorithm is diffie-hellman
Graceful DH Diffie-Hellman；The predetermined encryption algorithm is DES Cipher AES.
8. a kind of content of multimedia acquisition device, it is characterised in that applied to terminal device, described device includes：
Execution module, for after the acquisition authority of any rate content of multimedia has been obtained, it is more to send the rate to server
Media representation corresponding to media content describes MPD and obtains request, and runs default exchange algorithm, consults to obtain with the server
The corresponding key of this connection；
Receiving module, the MPD file sent for receiving the server, and obtain the time code included in the MPD file；
Module is run, for running predetermined encryption algorithm, obtains each multimedia slicing title successively；Wherein, obtain for the first time
Multimedia slicing title is that other multimedia slicing titles are according to the key according to obtained by the key and the time code
Obtained by the multimedia slicing title obtained with the last time；
Processing module, for sending the fragment request for including each multimedia slicing title to the server successively, and receive institute
State the index burst and multimedia slicing of server transmission；Wherein, the index burst is encrypted using the key；The clothes
The corresponding relation of each multimedia slicing title and each multimedia slicing is preserved in business device, each multimedia slicing title is the clothes
Business device obtains according to the key, the time code and the predetermined encryption algorithm.
9. device according to claim 8, it is characterised in that described device also includes：
Display module, the multimedia slicing of the predetermined number sent for receiving the server, and show the multimedia slicing.
10. device according to claim 8 or claim 9, it is characterised in that the default exchange algorithm is the graceful DH of diffie-hellman
Diffie-Hellman；The predetermined encryption algorithm is DES Cipher AES.
11. a kind of content of multimedia acquisition device, it is characterised in that applied to server, described device includes：
Receiving module, the media representation sent for receiving terminal apparatus describes MPD and obtains request, when being asked as the end
When end equipment has obtained the rate content of multimedia for obtaining authority, default exchange algorithm is run, is consulted with the terminal device
The key corresponding to this connection；
First sending module, for sending the MPD file for including time code to the terminal device；
Module is run, for running predetermined encryption algorithm, obtains each multimedia slicing title successively；Wherein, obtain for the first time
Multimedia slicing title is that other multimedia slicing titles are according to the key according to obtained by the key and the time code
Obtained by the multimedia slicing title obtained with the last time；
Processing module, for building the corresponding relation of each multimedia slicing title and each multimedia slicing, receive the terminal and set
The fragment request for including multimedia slicing title that preparation is sent, and send corresponding index burst and more matchmakers to the terminal device
Body burst；Wherein, the index burst is encrypted using the key.
12. device according to claim 11, it is characterised in that described device also includes：
Second sending module, for sending the multimedia slicing of predetermined number to the terminal device.
13. device according to claim 11, it is characterised in that the processing module, specifically for receiving the terminal
The fragment request for including each multimedia slicing title that equipment is sent, and according to each Terminal Equipment Identifier locally preserved with having sent out
The corresponding relation of multimedia slicing title is sent, it is determined that the portion for the rate content of multimedia being transmitted across to the terminal device
Divide multimedia slicing, and send the multimedia point for the rate content of multimedia not being sent to the terminal device successively
Piece.
14. according to the device described in claim any one of 11-13, it is characterised in that the default exchange algorithm is diffie-conspicuous
Germania DH Diffie-Hellman；The predetermined encryption algorithm is DES Cipher AES.
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