CN100595835C - Video/audio playing device and player - Google Patents
Video/audio playing device and player Download PDFInfo
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- CN100595835C CN100595835C CN200810086489A CN200810086489A CN100595835C CN 100595835 C CN100595835 C CN 100595835C CN 200810086489 A CN200810086489 A CN 200810086489A CN 200810086489 A CN200810086489 A CN 200810086489A CN 100595835 C CN100595835 C CN 100595835C
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Abstract
The invention provides a video and audio playing device and a player which are suitable for the multimedia field. The device comprises a key unit, a control unit, an encrypting-decrypting unit and a playing unit. In the invention, the video and audio playing unit is provided with the encryption function, changes the prior condition that media data can only be encrypted in a media server and distributes the key which is originally preserved just in the media server of a seller to the video and audio playing device. The media server has no information safety problem, thus the seller can enlargesale network, which can promote the sale of media products.
Description
Technical field
The invention belongs to the multimedia field, relate in particular to a kind of video-audio playing device and player.
Background technology
Now, the sale of media product all is to adopt medium provider to produce media product, after encrypting by the media server of dealer, sails again the pattern of selling to the consumer, and media terminations such as consumer's video-audio playing device are decrypted the back to media data and play.Fig. 1 is the structured flowchart of existing video-audio playing device 100 ', control module 102 ' in the playing device will store in the storage unit 105 ' through interface unit 101 ' from the media data that computer 300 ' is downloaded, these media datas come from the media server 200 ' on the internet, and passed through the encryption of media server 200 ', so these media datas must be used for playing through just being sent to broadcast unit 106 ' after the 103 ' deciphering of the decryption unit in the video-audio playing device 100 '.But because this video-audio playing device 100 ' does not have the function of encryption, so media product that medium provider produces, just can sell the consumer after must encrypting through the media server 200 ' of dealer, and this energy encrypted media server 200 ' all have key, consideration for information security, the media server 200 ' that has key can not arbitrarily be provided with, so dealer can not arbitrarily arrange commercial networks, can have influence on the sales situation of media product so greatly.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of video-audio playing device, is intended to solve present video-audio playing device and does not have encryption function and be unfavorable for the problem that media product is sold.
The embodiment of the invention is achieved in that a kind of video-audio playing device, is connected with media server, media storage device, and described video-audio playing device comprises:
Key unit is used to provide the key of encryption and decryption;
Control module, the encryption format numbering that is used for sending according to described media server is set encryption format, and the cipher key number that sends according to described media server obtains key from described key unit;
The enciphering/deciphering unit is used for the media data that described media server sends is encrypted, and the media data in the described media storage device is decrypted; And
Broadcast unit is used for simulating signal is decoded, is processed into to the media data after the described deciphering, and sends to the external played device and play.
Another purpose of the embodiment of the invention is to provide a kind of player that contains above-mentioned video-audio playing device.
In embodiments of the present invention, video-audio playing device has encryption function, changed the situation that original media data must be encrypted at media server, and the key in the media server of dealer is distributed in the video-audio playing device originally, there is not the problem of information security in this media server, therefore dealer can enlarge commercial networks, helps the sale of media product.
Description of drawings
Fig. 1 is the structured flowchart of existing video-audio playing device;
Fig. 2 is the structured flowchart of the video-audio playing device that provides of the embodiment of the invention;
Fig. 3 shows the format structure figure of the media data after the encryption that the embodiment of the invention provides.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 2 shows the structure of the video-audio playing device that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
Video-audio playing device 100 comprises interface unit 101 and control module 102.Control module 102 comprises controller 1021 and media storage device serial number register 1022, media storage device serial number register 1022 is being deposited the sequence number of the media storage device 300 that is connected with video-audio playing device 100, the media data that controller 1021 sends over by interface unit 101 receiving media servers 200, cipher key number and encryption format numbering.Controller 1021 is set encryption format according to the encryption format numbering, and obtain key from the key unit of 100 li of video-audio playing devices according to cipher key number, key unit comprises storage unit 105 and produces key circuit 104, controller 1021 extracts the internal memory key respectively and produces key from storage unit 105 and generation key circuit 104 according to cipher key number, be specially: storage unit 105 can be ROM, EPROM, EEROM, FLASH, FRAM, it is used to store the sequence number and the internal memory set of cipher key of video-audio playing device 100, internal memory key in the internal memory set of cipher key is static the generation, be divided into public keys and private cipher key two partly, each key in the internal memory set of cipher key all has unique cipher key number, controller 1021 receiving media servers 200 send over cipher key number, if the cipher key number of internal memory key then obtains public keys or private cipher key according to this cipher key number from storage unit 105; Perhaps controller 1021 receiving media servers 200 send over cipher key number, if produce the cipher key number of key, control module 102 controls generate the generation key with sequence number and media data that the corresponding generation key of this cipher key number circuit 104 is deposited according to this cipher key number, media storage device serial number register 1022.
Key and encryption format that enciphering/deciphering unit 103 sends over according to control module 102, the media data that adopts symmetric private key algorithm that control module 102 is sent here is encrypted, as one embodiment of the present of invention, symmetry private key algorithm can be DES or symmetry private key algorithms such as 3DES or AES IDEA algorithm, and concrete mode is as follows:
(1) if there is not key, then enciphering/deciphering unit 103 is not encrypted media data;
(2) if be the internal memory key, then enciphering/deciphering unit 103 adopts internal memory key and encryption format that media data is encrypted;
(3) if for producing key, then enciphering/deciphering unit 103 adopts generation key and encryption format that media data is encrypted.
Fig. 3 shows the form of the media data after the encryption that the embodiment of the invention provides, media data comprises file header district and media article district, the files-designated Head Section that wherein adopts public keys to encrypt is being deposited the data relevant with media content, comprise: media information, media name, information and cipher key number and the encryption format numberings relevant such as singer with presents header zone encryption, also depositing the broadcast sequence number prescribed information of video-audio playing device 100 in addition, be used to limit the broadcast authority of the video-audio playing device 100 of different sequence numbers, be set as video-audio playing device 100 open the play authorities of 0 expression all sequence numbers if play the sequence number prescribed information; The media article district is splitted into a plurality of encrypted data pieces, and each encrypted data piece comprises the media article after the cipher key number relevant with the block encryption of this encrypted data, encryption format numbering and the encryption.
Again as shown in Figure 2, control module 102 will store 300 li of media storage devices into by interface unit 101 through the media data after the encryption, as one embodiment of the present of invention, interface unit 101 can be a USB interface, the SPI interface, UART interface, IIC interface or parallel port interface, media storage device 300 can be a laser disc, SD card etc.
When playing, video-audio playing device 100 is connected with the media storage device 300 that stores media data again, the controller 1021 of video-audio playing device 100 extracts media data, cipher key number and encryption format numbering from 300 li of media storage devices, controller 1021 is set encryption format according to the encryption format numbering, and obtain key from the key unit of 100 li of video-audio playing devices according to cipher key number, enciphering/deciphering unit 103 adopts symmetric private key algorithm that media data is decrypted according to described key and encryption format, and concrete mode is as follows:
(1) if there is not key, then enciphering/deciphering unit 103 is not decrypted media data, control module 102 is directly delivered to media data broadcast unit 106, simulating signal is decoded, is processed into to media data after 106 pairs of described deciphering of broadcast unit, and send to the external played device and play;
(2) if be the internal memory key, the internal memory key is divided into public keys and private cipher key, if therefore this internal memory key is if public keys, because the video-audio playing device of all sequence numbers 100 is all deposited the same public keys, when even the video-audio playing device 100 of different sequence number is adopted in encryption and decryption, but the key that media data is carried out encryption and decryption is the same, so the video-audio playing device 100 of different sequence numbers still can be decrypted broadcast to this media data, but this key is if private cipher key, because the video-audio playing device of different sequence numbers 100 is deposited different private cipher keys, when the video-audio playing device 100 of different sequence number is adopted in encryption and decryption, the key that media data is carried out encryption and decryption is also different, so the video-audio playing device 100 of the video-audio playing device 100 different sequence numbers that adopt when encrypting can not be decrypted broadcast to this media data.The mode that the key of this employing internal memory set of cipher key is encrypted media data, the video-audio playing device 100 that can be used for locking by certain sequence number is play;
(3) if for producing key, then enciphering/deciphering unit 103 is decrypted media data according to described key and encryption format, because this generation key is by cipher key number, the sequence number that media data and media storage device serial number register 1022 are deposited produces, so this key is relevant with the sequence number of the media storage device 300 that adopts at present, when the media storage device 300 of different sequence number is adopted in encryption and decryption, the key that media data is carried out encryption and decryption is also different, so video-audio playing device 100 can not be decrypted broadcast to the media data of the media storage device 300 that is stored in the media storage device 300 different sequence numbers that adopt when encrypting, the mode that the key of this employing generation set of cipher key is encrypted media data, can be used for locking the media storage device 300 of certain sequence number, the media storage device of using when promptly being used to the media storage device deciphered 300 and encrypting 300 must be same, so just can avoid the generation of copy right piracy.Generalized case, media server 200 sends to the numbering of the cipher key number of video-audio playing device 100 so long as not the internal memory key, then video-audio playing device 100 uses the generation key that media data is encrypted without exception, media data after encrypting like this just can be play by video-audio playing device 100 deciphering of different sequence numbers, but has locked the media storage device 300 of certain sequence number of medium data.
The media sales merchant can send different cipher key number to video-audio playing device 100 by control and implement different sales modes, can be used for product introduction as adopting not encrypt; As the cipher key number that sends public keys can make media data be used for the video-audio playing device 100 of all sequence numbers; As send the cipher key number of public keys, and set at the files-designated Head Section of media data and to play the sequence number prescribed information, video-audio playing device 100 can check that whether its sequence number determines whether playing, and so just can be used to lock the video-audio playing device 100 of a certain group sequence number in this scope; As send the cipher key number of private cipher key, can be used to lock the video-audio playing device 100 of certain sequence number; As send the cipher key number that produces key, can be used to lock the media storage device 300 of certain sequence number.
Video-audio playing device 100 can adopt a chip or multicore sheet to be packaged into an integrated circuit, perhaps make an electronics module in fixed (bonding) mode of thick film (Hybrid) mode or nation with chip and packaged integrated circuits, can prevent that so general user from taking inner structure apart, media data after the interception deciphering is used for commercial pirate.
Video-audio playing device 100 combines with other module as a module can constitute a player.
In embodiments of the present invention, video-audio playing device has encryption function, changed the situation that original media data must be encrypted at media server, and the key in the media server of dealer is distributed in the video-audio playing device originally, there is not the problem of information security in this media server, therefore dealer can enlarge commercial networks, helps the sale of media product.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1, a kind of video-audio playing device is connected with media server, media storage device, it is characterized in that described video-audio playing device comprises:
Key unit is used to provide the key of encryption and decryption;
Control module, the encryption format numbering that is used for sending according to described media server is set encryption format, and the cipher key number that sends according to described media server obtains key from described key unit;
The enciphering/deciphering unit is used for the media data that described media server sends is encrypted, and the media data in the described media storage device is decrypted; And
Broadcast unit is used for simulating signal is decoded, is processed into to the media data after the described deciphering, and sends to the external played device and play.
2, video-audio playing device as claimed in claim 1 is characterized in that, described key unit comprises:
Storage unit is used for the stored memory key; And
Produce the key circuit, be used for generating the generation key.
3, video-audio playing device as claimed in claim 1 is characterized in that, described control module comprises:
Controller, the encryption format numbering that is used for sending according to described media server is set encryption format, and obtains key according to cipher key number from described key unit; And
The media storage device serial number register is used to deposit the sequence number of the media storage device that is connected with video-audio playing device.
4, video-audio playing device as claimed in claim 1 is characterized in that, described video-audio playing device is to be connected with media server, media storage device by interface unit, described interface unit is a USB interface, SPI interface, UART interface, IIC interface or parallel port interface.
5, video-audio playing device as claimed in claim 1, it is characterized in that, described enciphering/deciphering unit adopts symmetric private key algorithm that the media data that described media server sends is encrypted, media data in the described media storage device is decrypted, and symmetry private key algorithm is DES or 3DES or AES or IDEA algorithm.
6, video-audio playing device as claimed in claim 1, it is characterized in that, described video-audio playing device adopts a chip or multicore sheet to be packaged into an integrated circuit, perhaps decides mode with chip and packaged integrated circuits with thick film mode or nation and makes an electronics module.
7, a kind of player that comprises the video-audio playing device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810086489A CN100595835C (en) | 2008-03-13 | 2008-03-13 | Video/audio playing device and player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810086489A CN100595835C (en) | 2008-03-13 | 2008-03-13 | Video/audio playing device and player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101286339A CN101286339A (en) | 2008-10-15 |
| CN100595835C true CN100595835C (en) | 2010-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810086489A Expired - Fee Related CN100595835C (en) | 2008-03-13 | 2008-03-13 | Video/audio playing device and player |
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| Country | Link |
|---|---|
| CN (1) | CN100595835C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109381193B (en) * | 2017-08-07 | 2021-07-20 | 圣布拉斯特有限公司 | Hearing test device and method of operating the same |
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2008
- 2008-03-13 CN CN200810086489A patent/CN100595835C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101286339A (en) | 2008-10-15 |
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