CN104661109A - Method and system for hiding media URI (Uniform Resource Identifier) in CDN (Content Delivery Network) and terminal - Google Patents

Method and system for hiding media URI (Uniform Resource Identifier) in CDN (Content Delivery Network) and terminal Download PDF

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Publication number
CN104661109A
CN104661109A CN201310585928.6A CN201310585928A CN104661109A CN 104661109 A CN104661109 A CN 104661109A CN 201310585928 A CN201310585928 A CN 201310585928A CN 104661109 A CN104661109 A CN 104661109A
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China
Prior art keywords
media
uri
cdn
encryption
broadcast address
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Granted
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CN201310585928.6A
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Chinese (zh)
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CN104661109B (en
Inventor
黄小桑
沈昕
祝谷乔
罗传飞
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Priority to CN201310585928.6A priority Critical patent/CN104661109B/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/6437—Real-time Transport Protocol [RTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • H04N21/2351—Processing of additional data, e.g. scrambling of additional data or processing content descriptors involving encryption of additional data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H04N21/4353—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving decryption of additional data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/858—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot
    • H04N21/8586—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot by using a URL

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

The disclosure relates to a method and a system for hiding a media URI (Uniform Resource Identifier) in a CDN (Content Delivery Network) and a terminal. The method comprises the following steps: requesting the playing address of media to be played from a playing address generating module; receiving an encrypted playing address, and forwarding the encrypted playing address to the CDN through a playing list request; receiving a playing list file returned by the CDN, wherein the playing list file comprises the URI of each fragment of encrypted requested media; requesting a media file from the CDN, wherein a request of the media file comprises the URI of each fragment of the encrypted requested media; and receiving the media file returned by the CDN. Through adoption of the method and the system, the media URI can be hidden when an HAS (HTTP Adaptive Streaming) mechanism is adopted.

Description

To method, system and terminal that the media URI in CDN hides
Technical field
The disclosure relates to field of three-network convergence, especially, relate to a kind of based on HAS(HTTPAdaptive Streaming, HTTP adaptive stream media) machine-processed to CDN(ContentDelivery Network, content distributing network) in media URI(Uniform ResourceIdentifier, uniform resource identifier) carry out method, system and the user terminal hidden.
Background technology
In recent years, internet video fast development, the flow of video content had accounted for the half of whole internet traffic.Speak of internet video just to have to mention stream media technology, the development of stream media technology facilitates the fast development of current internet video just.
Traditional media content distribution technologies mainly contains two large classes, one class is with RTSP(Real TimeStreaming Protocol, real-time stream media protocol)/RTP(Real Time TransferProtocol, RTP) be the connection-oriented stream media technology of representative, another kind of, be the connectionless HTTP progressive download that current major video website adopts.
So-called progressive download, namely terminal player can start the broadcasting of media before whole media file has been downloaded, if client and service end all support HTTP1.1, then choose arbitrarily a time point in the part that terminal also can never have been downloaded and start to play.
But, all there is certain defect in traditional media content distribution technologies and HTTP progressive download technology, at this moment HAS technology is arisen at the historic moment, it has merged traditional RTSP/RTP stream media technology and the advantage based on HTTP progressive download technology, has efficient, easily extensible and compatible strong feature.
The feature that the traditional stream media technology of HAS combine with technique and HTTP progressive download are play, in the mode of HTTP to user's transfer medium content, the employing of this technology can promote the media playing experience of user greatly, and this technology reduces the technical sophistication degree of head end server simultaneously.Load mode based on HTTP improves media content penetration capacity in the network device, and this technology has become the trend of streaming media video industry development at present.
HAS technology is a kind of distribution of media mode of mixing, to the mode that the experience of user is stream, but in fact the same with the HTTP progressive download mode download distribution adopting http protocol to complete content, but these media contents have all been cut into a series of media piecemeal to be transmitted, this is a key technology of HAS.The time span of each piecemeal is identical, is generally 2 ~ 10 seconds.
Media piecemeal is stored in HTTP Web server, client is in a linear fashion to Web server request media piecemeal, and the download of media piecemeal is carried out in traditional HTTP mode, when media piecemeal is downloaded to client, client plays this series of media piecemeal in order.Because these media piecemeals are encoded according to the rule of agreement, sleazy overlap or discontinuous between each media piecemeal, for user, then sees a seamless level and smooth result of broadcast.
It is pointed out that network video service uses CDN to carry out the transmission of media file to a large amount of user terminals, in service process, CDN needs the real URI hiding media file to user terminal, steals chain behavior to prevent.
In HAS mechanism, client is the media file address access respective media files by comprising in play list file, but, only the address of play list file is encrypted in the door chain mechanism of existing telecom operators, cannot the media file address comprised in play list file be encrypted.Therefore, under this mechanism, the existing door chain mechanism of telecom operators cannot be hidden the URI of the media file in CDN.
Summary of the invention
The disclosure proposes new technical scheme in view of at least one in above problem.
The disclosure provides a kind of method hidden the media URI in CDN based on HAS mechanism in one, and it can hide media URI when adopting HAS mechanism.
The disclosure provides a kind of user terminal on the other hand at it, and it can hide media URI when adopting HAS mechanism.
The disclosure provides a kind of system hidden the media URI in CDN based on HAS mechanism in it is another, and it can hide media URI when adopting HAS mechanism.
According to the disclosure, a kind of method hidden the media URI in CDN based on HAS mechanism is provided, comprises:
To the broadcast address of broadcast address generation module request media to be played;
Receive the broadcast address of encryption, and by playlist request, the broadcast address of encryption is forwarded to CDN;
Receive the play list file that returns of CDN, wherein, comprise in play list file encryption ask the URI of each burst of media;
Ask media file to CDN, to comprise in the request of media file encryption ask the URI of each burst of media;
Receive the media file that CDN returns.
In embodiments more of the present disclosure, the method also comprises:
CDN is after receiving the broadcast address of encryption, and the URI after encryption is accordingly sent to user terminal by the broadcast address according to encryption.
In embodiments more of the present disclosure, the URI after encryption accordingly sends to the step of user terminal to comprise by the broadcast address according to encryption:
The broadcast address of encryption is decrypted;
The URI of each burst of media that the play list file corresponding with the broadcast address after deciphering comprises is encrypted;
Generation comprises the play list file of the encryption URI of asked each burst of media and sends to user terminal.
In embodiments more of the present disclosure, the method also comprises:
CDN, after receiving the request to media file, is decrypted the URI of each burst wherein comprised;
And the media slicing corresponding with the URI after deciphering is sent to user terminal.
According to the disclosure, additionally provide a kind of user terminal, comprising:
Broadcast address request unit, for the broadcast address to broadcast address generation module request media to be played;
Broadcast address retransmission unit, for receiving the broadcast address of encryption, and is forwarded to CDN by playlist request by the broadcast address of encryption;
Listing file receiving element, for receiving the play list file that CDN returns, wherein, comprise in play list file encryption ask the URI of each burst of media;
Media file request unit, for asking media file to CDN, to comprise in the request of media file encryption ask the URI of each burst of media;
Media file receiving element, for receiving the media file that CDN returns.
According to the disclosure, additionally provide a kind of system media URI in CDN hidden based on HAS mechanism, comprise the user terminal of CDN, broadcast address generation module and previous embodiment.
In embodiments more of the present disclosure, this CDN comprises:
URI ciphering unit, sends to user terminal for the broadcast address according to encryption by the URI after encryption accordingly.
In embodiments more of the present disclosure, URI ciphering unit comprises:
Address deciphering subelement, for being decrypted the broadcast address of encryption;
Encryption sub-unit operable, the URI for each burst of media comprised the play list file corresponding with the broadcast address after deciphering is encrypted;
Listing file generates subelement, for generating the play list file of the encryption URI comprising asked each burst of media and sending to user terminal.
In embodiments more of the present disclosure, this CDN also comprises:
URI decryption unit, for being decrypted the URI of each burst wherein comprised;
Media slicing transmitting element, for being sent to user terminal by the media slicing corresponding with the URI after deciphering.
In technical scheme of the present disclosure, the URI corresponding to each burst of media file due to CDN encrypts respectively, and the URI after encryption is sent by the mode of play list file give user terminal, make user terminal can only see the URI of encryption, so prevent media file to link stolen.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the disclosure, forms a application's part.In the accompanying drawings:
Fig. 1 be a disclosure embodiment based on the schematic flow sheet of HAS mechanism to the method that the media URI in CDN hides.
Fig. 2 be another embodiment of the disclosure based on the schematic flow sheet of HAS mechanism to the method that the media URI in CDN hides.
Fig. 3 is the structural representation of the user terminal of a disclosure embodiment.
Fig. 4 be a disclosure embodiment based on the structural representation of HAS mechanism to the system that the media URI in CDN hides.
Fig. 5 be another embodiment of the disclosure based on the structural representation of HAS mechanism to the system that the media URI in CDN hides.
Fig. 6 be the another embodiment of the disclosure based on the structural representation of HAS mechanism to the system that the media URI in CDN hides.
Embodiment
Below with reference to accompanying drawings the disclosure is described.It should be noted that following being described in is only explanatory and exemplary in essence, never as any restriction to the disclosure and application or use.Unless stated otherwise, otherwise positioned opposite and numerical expression and the numerical value of the parts of setting forth in an embodiment and step do not limit the scope of the present disclosure.In addition, technology well known by persons skilled in the art, method and apparatus may not be discussed in detail, but are intended to the part becoming specification in appropriate circumstances.
The disclosure following example provides a kind of in the process of the network video service based on HAS mechanism to the technical scheme that the media URI in CDN hides.In this technical scheme, when CDN transmits play list file to user terminal, the media URI wherein comprised is encrypted, when user terminal requests media content, by CDN, media URI is decrypted again, and then user oriented terminal hides the true URI of media file in CDN by the way.
Fig. 1 be a disclosure embodiment based on the schematic flow sheet of HAS mechanism to the method that the media URI in CDN hides.
As shown in Figure 1, this embodiment can comprise the following steps:
S102, to the broadcast address of broadcast address generation module request media to be played;
Particularly, when user terminal thinks that certain media file is play in request, first it need the broadcast address of the broadcast address generation module request media file to be played to network side.
S104, receives the broadcast address of encryption, and by playlist request, the broadcast address of encryption is forwarded to CDN;
Particularly, the broadcast address that broadcast address generation module is corresponding with this media file according to the inquiry of asked media file, and send to user terminal after this broadcast address being encrypted.The broadcast address of this encryption, after receiving the broadcast address of this encryption, is directly carried in playlist request and sends to CDN by user terminal.
S106, receives the play list file that returns of CDN, wherein, comprise in play list file encryption ask the URI of each burst of media;
Particularly, CDN, after receiving playlist request, generates play list file according to the broadcast address of encryption and returns to user terminal.
S108, asks media file to CDN, to comprise in the request of media file encryption ask the URI of each burst of media;
Particularly, user terminal, after receiving play list file, sends media file request to CDN, comprises the media URI that CDN issues the encryption of user terminal in this request.
S110, receives the media file that CDN returns;
Particularly, after media file request is sent to CDN by user terminal, CDN extracts the media URI of encryption wherein, is decrypted it, obtains corresponding media file and send to user terminal according to the URI after deciphering.
In this embodiment, the URI corresponding to each burst of media file due to CDN encrypts respectively, and the URI after encryption sent by the mode of play list file give user terminal, make user terminal can only see the URI of encryption, so prevent media file to link stolen.
Further, after step s 104, the broadcast address of encryption is transmitted to CDN by user terminal, and CDN is after receiving the broadcast address of encryption, and the URI after encryption is accordingly sent to user terminal by the broadcast address according to encryption.
Particularly, the step of user terminal is sent to comprise the URI after encryption accordingly according to the broadcast address of encryption:
The broadcast address of encryption is decrypted, it is to be noted, CDN and broadcast address generation module have arranged to be encrypted and the key deciphered broadcast address in advance, and then make CDN correctly can decrypt broadcast address wherein after receiving the broadcast address of encryption;
The URI of each burst of media that the play list file corresponding with the broadcast address after deciphering comprises is encrypted;
Generation comprises the play list file of the encryption URI of asked each burst of media and sends to user terminal.
Further, after step S108, CDN, after receiving the request to media file, is decrypted the URI of each burst wherein comprised;
And the media slicing corresponding with the URI after deciphering is sent to user terminal.
Fig. 2 be another embodiment of the disclosure based on the schematic flow sheet of HAS mechanism to the method that the media URI in CDN hides.
As shown in Figure 2, what it described is based on the CDN door chain flow process in network video service of the present disclosure, by CDN, the media URI in play list file is encrypted in this flow process, by CDN, the media file request of user is decrypted again, concerning the encrypt and decrypt process CDN being a closed loop, this process conceals the true URI of media file in CDN to user terminal.
As shown in Figure 2, this embodiment can comprise the following steps:
S202, user terminal is to broadcast address formation component request broadcast address;
S204, broadcast address generation module generates the broadcast address of encryption;
S206, the broadcast address of encryption is returned to user terminal by broadcast address generation module;
S208, user terminal asks play content according to the broadcast address of encryption to CDN, that is, the broadcast address of encryption is carried on the request repeating of play list file to CDN by user terminal;
S210, according to the encryption and decryption key that CDN and broadcast address generation module arrange in advance, CDN is decrypted broadcast address;
S212, CDN generates the play list file comprising encrypted media URI, particularly, CDN is decrypted the real broadcast address of rear acquisition to the broadcast address received, the media file URI that play list file corresponding in real broadcast address comprises is encrypted by CDN, generates the play list file comprising encrypted media file URI;
The play list file of generation is returned as user terminal by S214, CDN;
S216, user terminal asks media content according to play list file to CDN;
S218, CDN are decrypted the media URI comprised in media content request;
The media content corresponding with the media URI of deciphering is returned to user terminal by S220, CDN.
One of ordinary skill in the art will appreciate that, realize the whole of said method embodiment to have been come by the hardware that program command is relevant with part steps, aforesaid program can be stored in a computing equipment read/write memory medium, this program is when performing, perform and comprise the step of said method embodiment, and aforesaid storage medium can comprise ROM, RAM, magnetic disc and CD etc. various can be program code stored medium.
Fig. 3 is the structural representation of the user terminal of a disclosure embodiment.
As shown in Figure 3, the terminal 30 in this embodiment can comprise broadcast address request unit 302, broadcast address retransmission unit 304, listing file receiving element 306, media file request unit 308 and media file receiving element 310.Wherein,
Broadcast address request unit 302, for the broadcast address to broadcast address generation module request media to be played;
Broadcast address retransmission unit 304, for receiving the broadcast address of encryption, and is forwarded to CDN by playlist request by the broadcast address of encryption;
Listing file receiving element 306, for receiving the play list file that CDN returns, wherein, comprise in play list file encryption ask the URI of each burst of media;
Media file request unit 308, for asking media file to CDN, to comprise in the request of media file encryption ask the URI of each burst of media;
Media file receiving element 310, for receiving the media file that CDN returns.
In this embodiment, the URI corresponding to each burst of media file due to CDN encrypts respectively, and the URI after encryption sent by the mode of play list file give user terminal, make user terminal can only see the URI of encryption, so prevent media file to link stolen.
Fig. 4 be a disclosure embodiment based on the structural representation of HAS mechanism to the system that the media URI in CDN hides.
As shown in Figure 4, the system 40 in this embodiment can comprise CDN402, broadcast address generation module 404 and user terminal 406.Wherein, user terminal 406 can be realized by previous embodiment.
Fig. 5 be another embodiment of the disclosure based on the structural representation of HAS mechanism to the system that the media URI in CDN hides.
As shown in Figure 5, compared with the embodiment in Fig. 4, the CDN502 in the system 50 in this embodiment can comprise:
URI ciphering unit 502a, sends to user terminal for the broadcast address according to encryption by the URI after encryption accordingly.
Further, URI ciphering unit can comprise address deciphering subelement, encryption sub-unit operable and listing file generation subelement.Wherein,
Address deciphering subelement, for being decrypted the broadcast address of encryption;
Encryption sub-unit operable, the URI for each burst of media comprised the play list file corresponding with the broadcast address after deciphering is encrypted;
Listing file generate subelement, for generate comprise encryption ask the play list file of the URI of each burst of media and send to user terminal.
Fig. 6 be the another embodiment of the disclosure based on the structural representation of HAS mechanism to the system that the media URI in CDN hides.
As shown in Figure 6, compared with the embodiment in Fig. 5, the CDN602 in the system 60 in this embodiment can also comprise URI decryption unit 602a and media slicing transmitting element 602b.Wherein,
URI decryption unit 602a, for deciphering the URI of each burst wherein comprised;
Media slicing transmitting element 602b, for being sent to user terminal by the media slicing corresponding with the URI after deciphering.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and part identical with similar between each embodiment can cross-reference.For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part can see the explanation of embodiment of the method part.
It is pointed out that disclosure above-described embodiment is applicable to the network video service based on HAS mechanism, can video signal effectively hiding, to improve the fail safe of CDN the media URL in CDN.
Although describe the disclosure with reference to exemplary embodiment, should be understood that the disclosure is not limited to above-mentioned exemplary embodiment.It will be obvious to those skilled in the art that and can revise above-mentioned exemplary embodiment under the condition not deviating from the scope of the present disclosure and spirit.The scope of appended claim should be endowed the widest explanation, to comprise all such amendments and equivalent 26S Proteasome Structure and Function.

Claims (9)

1., based on the method that HAS mechanism is hidden the media URI in CDN, it is characterized in that, comprising:
To the broadcast address of broadcast address generation module request media to be played;
Receive the broadcast address of encryption, and by playlist request, the broadcast address of encryption is forwarded to CDN;
Receive the play list file that described CDN returns, wherein, comprise in described play list file encryption ask the URI of each burst of media;
Ask media file to described CDN, to comprise in the request of media file encryption ask the URI of each burst of media;
Receive the media file that described CDN returns.
2. the method media URI in CDN hidden based on HAS mechanism according to claim 1, it is characterized in that, described method also comprises:
Described CDN is after receiving the broadcast address of encryption, and the URI after encryption is accordingly sent to user terminal by the broadcast address according to encryption.
3. the method hidden the media URI in CDN based on HAS mechanism according to claim 2, is characterized in that, the URI after encryption accordingly sends to the step of user terminal to comprise by the broadcast address according to encryption:
The broadcast address of encryption is decrypted;
The URI of each burst of media that the play list file corresponding with the broadcast address after deciphering comprises is encrypted;
Generation comprises the play list file of the encryption URI of asked each burst of media and sends to user terminal.
4. the method media URI in CDN hidden based on HAS mechanism according to claim 2, it is characterized in that, described method also comprises:
Described CDN, after receiving the request to media file, is decrypted the URI of each burst wherein comprised;
And the media slicing corresponding with the URI after deciphering is sent to user terminal.
5. a user terminal, is characterized in that, comprising:
Broadcast address request unit, for the broadcast address to broadcast address generation module request media to be played;
Broadcast address retransmission unit, for receiving the broadcast address of encryption, and is forwarded to CDN by playlist request by the broadcast address of encryption;
Listing file receiving element, for receiving the play list file that described CDN returns, wherein, comprise in described play list file encryption ask the URI of each burst of media;
Media file request unit, for asking media file to described CDN, to comprise in the request of media file encryption ask the URI of each burst of media;
Media file receiving element, for receiving the media file that described CDN returns.
6., based on the system that HAS mechanism is hidden the media URI in CDN, it is characterized in that, comprise CDN, broadcast address generation module and user terminal according to claim 5.
7. the system media URI in CDN hidden based on HAS mechanism according to claim 6, it is characterized in that, described CDN comprises:
URI ciphering unit, sends to user terminal for the broadcast address according to encryption by the URI after encryption accordingly.
8. the system media URI in CDN hidden based on HAS mechanism according to claim 7, it is characterized in that, described URI ciphering unit comprises:
Address deciphering subelement, for being decrypted the broadcast address of encryption;
Encryption sub-unit operable, the URI for each burst of media comprised the play list file corresponding with the broadcast address after deciphering is encrypted;
Listing file generates subelement, for generating the play list file of the encryption URI comprising asked each burst of media and sending to user terminal.
9. the system media URI in CDN hidden based on HAS mechanism according to claim 7, it is characterized in that, described CDN also comprises:
URI decryption unit, for being decrypted the URI of each burst comprised in the request of media file;
Media slicing transmitting element, for being sent to user terminal by the media slicing corresponding with the URI after deciphering.
CN201310585928.6A 2013-11-20 2013-11-20 Method, system and the terminal being hidden to the media URI in CDN Active CN104661109B (en)

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