CN108881115A - Multimedia data transmission method and device - Google Patents
Multimedia data transmission method and device Download PDFInfo
- Publication number
- CN108881115A CN108881115A CN201710329973.3A CN201710329973A CN108881115A CN 108881115 A CN108881115 A CN 108881115A CN 201710329973 A CN201710329973 A CN 201710329973A CN 108881115 A CN108881115 A CN 108881115A
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- CN
- China
- Prior art keywords
- performing environment
- medium data
- encryption
- stored
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H04L65/75—Media network packet handling
- H04L65/762—Media network packet handling at the source
-
- 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
- H04L65/75—Media network packet handling
- H04L65/764—Media network packet handling at the destination
-
- 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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
-
- 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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption
-
- 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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4408—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
Abstract
The present invention provides a kind of multimedia data transmission method and device.In transmitting terminal, the method includes：The original multimedia data being stored in secure storage areas is encrypted in credible performing environment；Encrypted multi-medium data is stored in the conventional memory block of rich performing environment；Encrypted multi-medium data is sent to receiving end in rich performing environment.In receiving end, the method includes：The multi-medium data by encryption that transmitting terminal is sent is received in rich performing environment；The multi-medium data by encryption is stored in the conventional memory block of rich performing environment；The multi-medium data by encryption is decrypted in credible performing environment；Multi-medium data after decryption is stored in the secure storage areas of credible performing environment.The safeguard protection that the present invention can carry out data transmission between devices.
Description
Technical field
The present invention relates to technical field of data transmission more particularly to a kind of multimedia data transmission methods and device.
Background technique
Currently, HDTV (High Definition Television, the high definition television) epoch are coming, in order to adapt to height
, there is HDMI (High Definition Multimedia Interface, high-definition multimedia in the high bandwidth of clear TV
Interface).HDMI is a kind of high-definition digital interface standard, it can provide very high bandwidth, nondestructively transmission digital video and sound
Frequency signal.In order to guarantee that the high-resolution signal of HDMI transmission will not be recorded illegally, there have been HDCP (High-bandwidth
Digital Content Protection, high-bandwidth digital content protection) technology.
HDCP technical specification is by the leading completion of Intel, and when user carries out bootlegging, which will do it interference, drop
The low quality for copying the image come guarantees that the high-definition digital signal in transmission will not be illegal to protect to content
It obtains and records.
With the reinforcement to copyright protection, mandatory requirement supports the multimedia equipment of HDCP more and more now, still, existing
Some numerical protection modes are all based on closed equipment, can only protect inside equipment to data content.
Summary of the invention
Multimedia data transmission method and device provided by the invention, can carry out data transmission between devices
Safeguard protection.
In a first aspect, the present invention provides a kind of multimedia data transmission method, the method is applied to transmitting terminal, the hair
Sending end includes credible performing environment and rich performing environment, and the safety that original multimedia data is stored in the credible performing environment is deposited
In storage area, the method includes：
Original multimedia data is encrypted in credible performing environment；
Encrypted multi-medium data is stored in the conventional memory block of rich performing environment；
The encrypted multi-medium data is sent to receiving end in rich performing environment.
Optionally, it is described in credible performing environment to original multimedia data carry out encryption include：Recognize by HDCP
End of certificate encrypts original multimedia data in credible performing environment at later.
Second aspect, the present invention provide another multimedia data transmission method, and the method is applied to receiving end, described
Receiving end includes credible performing environment and rich performing environment, the method includes：
The multi-medium data by encryption that transmitting terminal is sent is received in rich performing environment；
The multi-medium data by encryption is stored in the conventional memory block of rich performing environment；
The multi-medium data by encryption is decrypted in credible performing environment；
Multi-medium data after decryption is stored in the secure storage areas of credible performing environment.
Optionally, in the secure storage areas that the multi-medium data by after decryption is stored in credible performing environment it
Afterwards, the method also includes：
The multi-medium data saved in the secure storage areas of the credible performing environment is shown.
Optionally, described that packet is decrypted to the original multimedia data by encryption in credible performing environment
It includes：After being completed by HDCP certification, the original multimedia data by encryption is carried out in credible performing environment
Decryption.
The third aspect, the present invention provide a kind of multi-medium data transmitting device, and described device is located at transmitting terminal, the transmission
End includes credible performing environment and rich performing environment, and original multimedia data is stored in the secure storage of the credible performing environment
In area, described device includes：
First storage unit, for saving original multimedia data；
Encryption unit, for being encrypted in credible performing environment to the original multimedia data；
Second storage unit, for encrypted multi-medium data to be stored in the conventional memory block of rich performing environment；
Transmission unit, for the encrypted multi-medium data to be sent to receiving end in rich performing environment.
Optionally, the encryption unit is used for after completing by HDCP certification, to described in credible performing environment
Multi-medium data is encrypted.
Fourth aspect, the present invention provide another multi-medium data transmitting device, and described device is located at receiving end, described to connect
Receiving end includes credible performing environment and rich performing environment, and described device includes：
Receiving unit, the multi-medium data by encryption sent for receiving transmitting terminal in rich performing environment；
Third storage unit is stored for the multi-medium data by encryption to be stored in the conventional of rich performing environment
In area；
Decryption unit, for the multi-medium data by encryption to be decrypted in credible performing environment；
4th storage unit, for the multi-medium data after decryption to be stored in the secure storage areas of credible performing environment
It is interior.
Optionally, described device further includes：
Display unit, for the multi-medium data after decryption to be stored in credible performing environment in the 4th storage unit
Secure storage areas in after, by the 4th storage unit save multi-medium data show.
Optionally, the decryption unit is used for after completing by HDCP certification, to described in credible performing environment
It is decrypted by the original multimedia data of encryption.
Multimedia data transmission method and device provided in an embodiment of the present invention, in transmitting terminal, in credible performing environment
It is stored in after being encrypted to the original multimedia data being stored in secure storage areas in the conventional memory block of rich performing environment,
Encrypted multi-medium data is sent to receiving end in rich performing environment；In receiving end, hair is received in rich performing environment
The multi-medium data Jing Guo Jia Mi that sending end is sent simultaneously is stored in the conventional memory block of rich performing environment, in credible execution ring
It is stored in after the multi-medium data by encryption is decrypted in border in the secure storage areas of credible performing environment.With existing skill
Art is compared, the safeguard protection that the present invention can be carried out data transmission between devices based on credible performing environment, so that plus
The safeguard measures such as close are easier to implement, and increase encryption data cracks difficulty, improve the safety of multi-medium data transmission.
Detailed description of the invention
Fig. 1 is the flow chart of one embodiment of the invention multimedia data transmission method；
Fig. 2 is the flow chart of another embodiment of the present invention multimedia data transmission method；
Fig. 3 is the stream compression schematic diagram of yet another embodiment of the invention multimedia data transmission method；
Fig. 4 is the stream compression schematic diagram of further embodiment of this invention multimedia data transmission method；
Fig. 5 is the structural schematic diagram of one embodiment of the invention multi-medium data transmitting device；
Fig. 6 is the structural schematic diagram of another embodiment of the present invention multi-medium data transmitting device.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of multimedia data transmission method, and the method is applied to transmitting terminal, the transmission
End includes credible performing environment (TEE, Trusted Execution Environment) and rich performing environment (REE, Rich
Execution Environment), multi-medium data is stored in the secure storage areas of the credible performing environment, such as Fig. 1 institute
Show, the method includes：
S11, original multimedia data is encrypted in credible performing environment.
Specifically, after being completed by HDCP certification, original multimedia data is added in credible performing environment
It is close.
S12, encrypted multi-medium data is stored in the conventional memory block of rich performing environment.
S13, the encrypted multi-medium data is sent to receiving end in rich performing environment.
The embodiment of the present invention provides another multimedia data transmission method, and the method is applied to receiving end, described to connect
Receiving end includes credible performing environment and rich performing environment, as shown in Fig. 2, the method includes：
S21, the multi-medium data by encryption that transmitting terminal is sent is received in rich performing environment.
S22, the multi-medium data by encryption is stored in the conventional memory block of rich performing environment.
S23, the multi-medium data by encryption is decrypted in credible performing environment.
Specifically, after being completed by HDCP certification, to described by the original more of encryption in credible performing environment
Media data is decrypted.
S24, the multi-medium data after decryption is stored in the secure storage areas of credible performing environment.
Further, after step S24, the method can also include：
The multi-medium data saved in the secure storage areas of the credible performing environment is shown.
Multimedia data transmission method provided in an embodiment of the present invention, in transmitting terminal, to preservation in credible performing environment
Original multimedia data in secure storage areas is stored in the conventional memory block of rich performing environment after being encrypted, and is held in richness
Encrypted multi-medium data is sent to receiving end in row environment；In receiving end, transmitting terminal hair is received in rich performing environment
The multi-medium data Jing Guo Jia Mi sent simultaneously is stored in the conventional memory block of rich performing environment, right in credible performing environment
It is stored in the secure storage areas of credible performing environment after the multi-medium data of encryption is decrypted.With prior art phase
Than the safeguard protection that the present invention can be carried out data transmission between devices based on credible performing environment, so that encryption etc.
Safeguard measure is easier to implement, and increase encryption data cracks difficulty, improves the safety of multi-medium data transmission.
The detailed process that multimedia transmission is carried out between transmitting terminal and receiving end is described in detail below.
As shown in figure 3, unprotected source high-definition data stream (A/V Data) is stored in the safe DDR of TEE in transmitting terminal
In (Dual Data Rate, Double Data Rate synchronous DRAM), it effectively prevent leakage of data.HDCP encrypting module exists
After completing by HDCP certification, start to encrypt initial data, data (encryption A/V Data) output after encrypting
In the non-security DDR of the side REE outside to TEE.Transmission module (such as wifi-display) is obtained from the non-security DDR of the side REE
Encrypted data (encryption A/V Data) is taken, and is sent.
As shown in figure 4, REE flanks the encryption data (encryption A/V Data) that transmitting-receiving sending end sends in receiving end, deposit
It stores up medium to be processed in non-security DDR.The encryption data received is decrypted in the HDCP deciphering module for having passed through certification,
Initial data (A/V Data) is stored in the safe DDR of the side TEE after completion.Playback equipment, projection device are directly from TEE
Data are obtained in the safe DDR of side for showing.
The embodiment of the present invention also provides a kind of multi-medium data transmitting device, and described device is located at transmitting terminal, the transmission
End includes credible performing environment and rich performing environment, and original multimedia data is stored in the secure storage of the credible performing environment
In area, as shown in figure 5, described device includes：
First storage unit 11, for saving original multimedia data；
Encryption unit 12, for being encrypted in credible performing environment to the original multimedia data；
Second storage unit 13, for encrypted multi-medium data to be stored in the conventional memory block of rich performing environment
It is interior；
Transmission unit 14, for the encrypted multi-medium data to be sent to receiving end in rich performing environment.
Optionally, the encryption unit 12 is used for after completing by HDCP certification, to original in credible performing environment
Beginning multi-medium data is encrypted.
The embodiment of the present invention also provides another multi-medium data transmitting device, and described device is located at receiving end, described to connect
Receiving end includes credible performing environment and rich performing environment, as shown in fig. 6, described device includes：
Receiving unit 21, the multi-medium data by encryption sent for receiving transmitting terminal in rich performing environment；
Third storage unit 22, the routine for the multi-medium data by encryption to be stored in rich performing environment are deposited
In storage area；
Decryption unit 23, for the multi-medium data by encryption to be decrypted in credible performing environment；
4th storage unit 24, for the multi-medium data after decryption to be stored in the secure storage areas of credible performing environment
It is interior.
Optionally, described device further includes：
Display unit, for the multi-medium data after decryption to be stored in credible execution ring in the 4th storage unit 24
After in the secure storage areas in border, the multi-medium data that the 4th storage unit 24 saves is shown.
Optionally, the decryption unit 23 is used for after completing by HDCP certification, to institute in credible performing environment
It states and is decrypted by the original multimedia data of encryption.
Multi-medium data transmitting device provided in an embodiment of the present invention, in transmitting terminal, to preservation in credible performing environment
Original multimedia data in secure storage areas is stored in the conventional memory block of rich performing environment after being encrypted, and is held in richness
Encrypted multi-medium data is sent to receiving end in row environment；In receiving end, transmitting terminal hair is received in rich performing environment
The multi-medium data Jing Guo Jia Mi sent simultaneously is stored in the conventional memory block of rich performing environment, right in credible performing environment
It is stored in the secure storage areas of credible performing environment after the multi-medium data of encryption is decrypted.With prior art phase
Than the safeguard protection that the present invention can be carried out data transmission between devices based on credible performing environment, so that encryption etc.
Safeguard measure is easier to implement, and increase encryption data cracks difficulty, improves the safety of multi-medium data transmission.
The device of the present embodiment can be used for executing the technical solution of above method embodiment, realization principle and technology
Effect is similar, and details are not described herein again.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of multimedia data transmission method, the method is applied to transmitting terminal, which is characterized in that the transmitting terminal includes can
Believe performing environment and rich performing environment, original multimedia data is stored in the secure storage areas of the credible performing environment, institute
The method of stating includes：
Original multimedia data is encrypted in credible performing environment；
Encrypted multi-medium data is stored in the conventional memory block of rich performing environment；
The encrypted multi-medium data is sent to receiving end in rich performing environment.
2. the method according to claim 1, wherein it is described in credible performing environment to the multi-medium data
Carrying out encryption includes：After being completed by HDCP certification, the multi-medium data is encrypted in credible performing environment.
3. a kind of multimedia data transmission method, the method is applied to receiving end, which is characterized in that the receiving end includes can
Believe performing environment and rich performing environment, the method includes：
The multi-medium data by encryption that transmitting terminal is sent is received in rich performing environment；
The multi-medium data by encryption is stored in the conventional memory block of rich performing environment；
The multi-medium data by encryption is decrypted in credible performing environment；
Multi-medium data after decryption is stored in the secure storage areas of credible performing environment.
4. according to the method described in claim 3, it is characterized in that, being stored in the multi-medium data by after decryption credible
After in the secure storage areas of performing environment, the method also includes：
The multi-medium data saved in the secure storage areas of the credible performing environment is shown.
5. according to the method described in claim 3, it is characterized in that, it is described in credible performing environment to it is described by encryption
Original multimedia data be decrypted including：After being completed by HDCP certification, to the process in credible performing environment
The original multimedia data of encryption is decrypted.
6. a kind of multi-medium data transmitting device, described device is located at transmitting terminal, which is characterized in that the transmitting terminal includes credible
Performing environment and rich performing environment, original multimedia data is stored in the secure storage areas of the credible performing environment, described
Device includes：
First storage unit, for saving original multimedia data；
Encryption unit, for being encrypted in credible performing environment to the original multimedia data；
Second storage unit, for encrypted multi-medium data to be stored in the conventional memory block of rich performing environment；
Transmission unit, for the encrypted multi-medium data to be sent to receiving end in rich performing environment.
7. device according to claim 6, which is characterized in that the encryption unit, for being completed by HDCP certification
Later, the original multimedia data is encrypted in credible performing environment.
8. a kind of multi-medium data transmitting device, described device is located at receiving end, which is characterized in that the receiving end includes credible
Performing environment and rich performing environment, described device include：
Receiving unit, the multi-medium data by encryption sent for receiving transmitting terminal in rich performing environment；
Third storage unit, for the multi-medium data by encryption to be stored in the conventional memory block of rich performing environment
It is interior；
Decryption unit, for the multi-medium data by encryption to be decrypted in credible performing environment；
4th storage unit, for the multi-medium data after decryption to be stored in the secure storage areas of credible performing environment.
9. device according to claim 8, which is characterized in that described device further includes：
Display unit, for the multi-medium data after decryption to be stored in the peace of credible performing environment in the 4th storage unit
After in full memory block, the multi-medium data that the 4th storage unit saves is shown.
10. device according to claim 8, which is characterized in that the decryption unit, for being completed by HDCP certification
Later, the original multimedia data by encryption is decrypted in credible performing environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710329973.3A CN108881115A (en) | 2017-05-11 | 2017-05-11 | Multimedia data transmission method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710329973.3A CN108881115A (en) | 2017-05-11 | 2017-05-11 | Multimedia data transmission method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108881115A true CN108881115A (en) | 2018-11-23 |
Family
ID=64319526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710329973.3A Pending CN108881115A (en) | 2017-05-11 | 2017-05-11 | Multimedia data transmission method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111586345A (en) * | 2019-02-19 | 2020-08-25 | 杭州海康威视数字技术股份有限公司 | Characteristic data protection method and device applied to monitoring camera |
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| CN105681882A (en) * | 2016-01-04 | 2016-06-15 | 华为技术有限公司 | Video output control method, video output control device and control circuit |
| CN105809037A (en) * | 2015-01-20 | 2016-07-27 | 动信科技股份有限公司 | System and method for rapidly deploying trusted execution environment application |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2759955A1 (en) * | 2013-01-28 | 2014-07-30 | ST-Ericsson SA | Secure backup and restore of protected storage |
| CN105809037A (en) * | 2015-01-20 | 2016-07-27 | 动信科技股份有限公司 | System and method for rapidly deploying trusted execution environment application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111586345A (en) * | 2019-02-19 | 2020-08-25 | 杭州海康威视数字技术股份有限公司 | Characteristic data protection method and device applied to monitoring camera |
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