CN102036102A - System and method for transcoding multimedia and system and method for playing multimedia - Google Patents
System and method for transcoding multimedia and system and method for playing multimedia Download PDFInfo
- Publication number
- CN102036102A CN102036102A CN2009101927076A CN200910192707A CN102036102A CN 102036102 A CN102036102 A CN 102036102A CN 2009101927076 A CN2009101927076 A CN 2009101927076A CN 200910192707 A CN200910192707 A CN 200910192707A CN 102036102 A CN102036102 A CN 102036102A
- Authority
- CN
- China
- Prior art keywords
- multimedia
- module
- cipher mode
- transcoding
- encrypted
- 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.)
- Pending
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention provides a system and method for transcoding a multimedia and a system and method for playing the multimedia. The method for transcoding the multimedia comprises the following steps of: carrying out audio-video stream separation on a multimedia source file and decoding and transcoding the separated audio stream and video stream; acquiring an encryption mode of setting and encrypting the multimedia by adopting a corresponding encryption algorithm according to the encryption mode; and synthesizing the transcoded audio stream and video stream and outputting the encrypted multimedia file. By adopting the system and method for transcoding the multimedia, the illegal use and copy of the multimedia can be prevented and the privacy and the copyright of the user can be effectively protected. The invention also provides the system and method for playing the transcoded multimedia.
Description
Technical field
The present invention relates to multimedia transcoding technology, more particularly, relate to system, the method for a kind of multimedia transcoding system, method and play multimedia.
Background technology
Along with the continuous progress of network technology, multimedia technology obtains fast development, and nowadays, multimedia has become requisite part in people's work, the study.For promoting further developing of multimedia service, satisfy people's different demands to multimedia service in routine work, life, some standardization bodies have proposed multiple audio/video encoding standard at different business demand in the society.For example, the H.263 standard that proposes at visual telephone and video conference business; MPEG2 standard at DVB, HDTV and DVD proposition; Mpeg 4 standard at streaming media service exploitation in the network; And can provide H.264 standard of high video compression performance, network close friend etc.
Because multiple coding standard exists simultaneously, the target device that each coding standard is suitable for compression efficiency, decoding speed, code stream in multimedia application etc. requires different, obtain diversified multimedia file thus, the employed file format of these multimedia files, video format and compressed format have nothing in common with each other.In order to effectively utilize existing multimedia resource, need between multiple coding standard, change, this technology of changing between various coding standards is multimedia transcoding technology.
At present, the transcoder on the network mostly is converted to popular format with multimedia, but these transcoding technologies can't prevent multimedia illegal use or duplicate, and can not protect user's privacy and copyright effectively.
Summary of the invention
Based on this, be necessary to provide a kind of multimedia transcoding system that can effectively protect privacy of user and copyright.
In addition, also be necessary to provide a kind of multi-media transcoding method that can effectively protect privacy of user and copyright.
In addition, also provide a kind of multimedia system that can play behind the above-mentioned transcoding.
And, the multimedia method after a kind of energy is play above-mentioned transcoding also is provided.
Described multimedia transcoding system comprises: separation module is used for that multimedia source files is carried out audio/video flow and separates; Decoder module links to each other with separation module, and audio stream and video flowing after separating are decoded; The transcoding module links to each other with decoder module, respectively decoded audio stream and video flowing is carried out transcoding; Encrypting module is used to obtain the cipher mode of setting, adopts corresponding cryptographic algorithm that multimedia is encrypted according to described cipher mode; Synthesis module links to each other with transcoding module and encrypting module, and audio stream behind the transcoding and video flowing is synthetic, the multimedia file after output is encrypted.
This system also can comprise: parameter is provided with module, links to each other with transcoding module, encrypting module and synthesis module, is used to be provided with cipher mode and multimedia parameter.
The cipher mode that this parameter is provided with the module setting can comprise: local cipher mode and server cipher mode.
And encrypting module also can be used for when the cipher mode that gets access to setting is the local cipher mode, adopts symmetric encipherment algorithm that multimedia is encrypted.
Encrypting module also can be used for when the cipher mode that gets access to setting is the server for encrypting mode in addition, adopts asymmetrical encryption algorithm that multimedia is encrypted.
Described multi-media transcoding method comprises: multimedia source files carried out audio/video flow separates, and to the audio stream after separating with video flowing is decoded and transcoding; Obtain the cipher mode of setting, adopt corresponding cryptographic algorithm that multimedia is encrypted according to described cipher mode; Audio stream behind the transcoding and video flowing is synthetic, the multimedia file after output is encrypted.
This method also can comprise: cipher mode is set, and described cipher mode comprises local cipher mode and server cipher mode.
The step that multimedia is encrypted can comprise: when the cipher mode that obtains is the local cipher mode, adopt symmetric encipherment algorithm that multimedia is encrypted.
In addition, the step that multimedia is encrypted comprises: when the cipher mode that obtains is the server for encrypting mode, adopt asymmetrical encryption algorithm that multimedia is encrypted.
Multimedia system behind the described broadcast transcoding comprises: deciphering module, be used to obtain the cipher mode of setting, and adopt corresponding cryptographic algorithm that multimedia is decrypted according to described cipher mode; Separation module links to each other with deciphering module, the multimedia after the deciphering is carried out audio/video flow separate; Decoder module links to each other with separation module, and the audio/video flow after separating is decoded; The audio frequency and video processing module links to each other with decoder module, and decoded audio/video flow is handled; Playing module links to each other audio stream after the playback process and video flowing with the audio frequency and video processing module.
Multimedia method behind the described broadcast transcoding comprises: obtain the cipher mode of setting, adopt corresponding cryptographic algorithm that multimedia is decrypted according to described cipher mode; Multimedia after the deciphering is carried out audio/video flow separate, and the audio stream after separating and video flowing are decoded and handled; Audio stream after the playback process and video flowing.
Above-mentioned multimedia transcoding system and method, to the audio stream after separating and video flowing is decoded and transcoding after, obtain the cipher mode of user's setting and adopt corresponding cryptographic algorithm that multimedia is encrypted, thereby after the audio stream behind the transcoding and video flowing is synthetic, can export the multimedia file after the encryption.Owing in transcoding process, multimedia is encrypted, can prevent from illegally to use and duplicate to multimedia, protected user's privacy and copyright effectively.During multimedia after playing this transcoding, adopt corresponding cryptographic algorithm that multimedia is decrypted earlier, again audio stream after the playback process and video flowing.
Description of drawings
Fig. 1 is the schematic diagram of multimedia transcoding system among the embodiment;
Fig. 2 is the flow chart of multi-media transcoding method among the embodiment;
Fig. 3 carries out the method for encrypting flow chart to multimedia among the embodiment;
Fig. 4 is the schematic diagram of the multimedia system behind the broadcast transcoding among the embodiment;
Fig. 5 is the multimedia method flow diagram behind the broadcast transcoding among the embodiment;
Fig. 6 is the method flow diagram that among the embodiment multimedia is decrypted.
Embodiment
Fig. 1 shows a multimedia transcoding system among the embodiment, and this system comprises separation module 100, decoder module 102, transcoding module 104, encrypting module 106 and synthesis module 108, wherein:
In one embodiment, this system comprises that also parameter is provided with module 110 (as shown in Figure 1), and this parameter is provided with module 110 and links to each other with transcoding module 104, encrypting module 106 and synthesis module 108, is used to be provided with cipher mode and multimedia parameter.The user is provided with the multimedia parameter that module 110 can be provided with by parameter and comprises audio frequency and video code check, encoder type, output file type, image resolution ratio etc., and wherein: audio frequency and video code check, codec type etc. can offer the transcoding that transcoding module 104 is carried out audio/video flow; Output file type, image resolution ratio etc. can offer the multimedia file of synthesis module 108 with output respective type and resolution; And the user can offer encrypting module 106 by the cipher mode that parameter is provided with module 110 settings, and the cipher mode that encrypting module 106 is provided with according to the user selects corresponding cryptographic algorithm that multimedia is encrypted.
In one embodiment, parameter is provided with the cipher mode that module 110 is provided with and comprises: local cipher mode and server cipher mode.Encrypting module 106 gets access to parameter when cipher mode that module 110 is provided with being set being the local cipher mode, then adopts symmetric encipherment algorithm that multimedia is encrypted; Encrypting module 106 gets access to parameter when cipher mode that module 110 is provided with being set being the server for encrypting mode, then adopts asymmetrical encryption algorithm that multimedia is encrypted.Under the server for encrypting mode, this system also can comprise the server (not shown in figure 1) of preserving the employed key of asymmetrical encryption algorithm.
Fig. 2 shows the flow process of multi-media transcoding method among the embodiment, and detailed process is as follows:
In step S202, multimedia source files is carried out audio/video flow separate, and to the audio stream after separating with video flowing is decoded and transcoding.
In step S204, obtain the cipher mode of setting, adopt corresponding cryptographic algorithm that multimedia is encrypted according to described cipher mode.
In step S206, audio stream behind the transcoding and video flowing is synthetic, the multimedia file after output is encrypted.
Fig. 3 shows among the embodiment multimedia is carried out the method for encrypting flow process, and detailed process is as follows:
In step S302, judge whether multimedia need encrypt, if then enter step S304, otherwise finish.When multimedia need not encrypted, can carry out transcoding to multimedia according to general transcoding technology.
In step S304, obtain the cipher mode that the user is provided with, judge that cipher mode is local cipher mode or server for encrypting mode, if the local cipher mode then enters step S306, if the server for encrypting mode then enters step S310.The cipher mode that the user is provided with comprises local cipher and server for encrypting dual mode, and different cipher modes should adopt different cryptographic algorithm to encrypted multimedia down.
In step S306, according to the password generation key of user's input.Under the local cipher mode, need to adopt symmetric encipherment algorithm to encrypted multimedia, employed key is the password of user's input during encryption.
In step S308, adopt symmetric encipherment algorithm to encrypted multimedia.Under the local cipher mode, encrypting module 106 adopts symmetric encipherment algorithm to encrypted multimedia.Symmetric encipherment algorithm all adopts identical key when encryption and decryption, in one embodiment, this key can generate according to the password of user's input, and symmetric encipherment algorithm can adopt des encryption algorithm commonly used and IDEA cryptographic algorithm.
In step S310, obtain encryption key from server.Under the server for encrypting mode, encrypting module 106 needs to adopt asymmetrical encryption algorithm to encrypted multimedia.Asymmetrical encryption algorithm employed key when encryption and decryption is a pair of PKI and the private key of coupling mutually, when encrypting plaintext, adopt public key encryption, when decrypting ciphertext, adopt the private key deciphering, and PKI is only known in encryption side, has only deciphering can know private key just now.Under the server for encrypting mode, need the user to import account and password logon server, obtain a pair of PKI and the private key of generation from server, during encryption, server then offers PKI encrypting module 106.
In step S312, adopt asymmetrical encryption algorithm to encrypted multimedia.Asymmetrical encryption algorithm can adopt RSA cryptographic algorithms commonly used and DSA cryptographic algorithm.
In one embodiment, only multimedia header data is encrypted, after the encryption that the audio stream behind the transcoding and video flowing is synthetic, the multimedia file after then can the out-feed head data encryption.Owing in transcoding process, multimedia is encrypted, can prevent from illegally to use and duplicate to multimedia, protected user's privacy and copyright effectively.
Below in conjunction with example multimedia ciphering process is described in detail.Among this embodiment, use a kind of special container format analysis processing encrypt file, this container is called QM.The file structure of QM is organized as shown in table 1 below:
Table 1
Because the audio/video flow data need the header data of accurate definition multimedia just can resolve, and audio/video flow data (i.e. Qm data part in the table 1) are bigger, but the therefore header data (i.e. dash area in table 1) of encipher only except that Qm header in ciphering process.And Qm header partly need increase the encryption indicating bit, is used to indicate cipher mode, and among this embodiment, the header structure of Qm header is as shown in table 2;
Table 2
| ?Type | Size | Flag | Reserved | Duration | OffsetType | Cell?Number |
| ?4 | 4 | 4 | 4 | 4 | 2 | 2 |
| ?‘TOV’ |
Wherein, each field of first line display, the second line number word table shows the byte number that corresponding field is shared, the third line is represented the content of each field.Encrypt indicating bit and use the Reserved field, the Reserved field accounts for 32 altogether, and low 2 are used to represent cipher mode.Among this embodiment, being provided with and encrypting indicating bit is to represent not encrypt in 00 o'clock, 01 expression local cipher mode, and 10 expression server for encrypting modes, 11 can define.When encrypting module 106 was the local cipher mode at the cipher mode that gets access to user's setting, then the encryption indicating bit of Qm header was set to 01; When the cipher mode that gets access to user's setting was the server for encrypting mode, then the encryption indicating bit of Qm header was set to 10.Then directly know the cipher mode that the user is set during deciphering according to set encryption indicating bit.
Fig. 4 shows the multimedia system behind the broadcast transcoding among the embodiment, and this system comprises that deciphering module 200, separation module 202, decoder module 204, audio frequency and video processing module 206, playing module 208 and parameter are provided with module 210, wherein:
In one embodiment, this system comprises that also above-mentioned parameter is provided with module 210, this parameter is provided with module 210 and links to each other with audio frequency and video processing module 206, be used to be provided with the parameter after audio frequency and video are handled, multimedia parameter such as whether comprise amplification of volume, sound equilibrium, color of image/brightness regulation, whether overturn.
In one embodiment, the cipher mode that deciphering module 200 gets access to comprises local cipher mode and server cipher mode, can know cipher mode by the encryption indicating bit that reads multimedia file.For example, for the multimedia file of QM form, can know the cipher mode that multimedia adopts by encrypting indicating bit in the data that reads Qm header.For the local cipher mode, deciphering module 200 adopts symmetric encipherment algorithm that multimedia is deciphered; For the server for encrypting mode, deciphering module 200 adopts asymmetrical encryption algorithm that multimedia is deciphered.Usually,, only multimedia header data is encrypted during encryption, decipher its header data when then deciphering and get final product because multimedia data division data volume is bigger.
Fig. 5 shows the multimedia method flow behind the broadcast transcoding among the embodiment, and detailed process is as follows:
In step S502, obtain the cipher mode of setting, adopt corresponding cryptographic algorithm that multimedia is decrypted according to cipher mode.
In step S504, the multimedia after the deciphering is carried out audio/video flow separate, and the audio stream after separating and video flowing are decoded and handled.
In step S506, audio stream after the playback process and video flowing.
Fig. 6 shows the method flow that among the embodiment multimedia is decrypted, and detailed process is as follows:
In step S602, judge whether multimedia encrypts, if then enter step S604, otherwise finish.Judge by the reading encrypted indicating bit whether multimedia encrypts.
In step S604, obtain the cipher mode of setting, judge that described cipher mode is local cipher mode or server for encrypting mode, if the local cipher mode then enters step S606, if the server for encrypting mode then enters step S610.In one embodiment, deciphering module 200 reading encrypted indicating bits, the cipher mode that is adopted when obtaining ciphering multimedia.Under the local cipher mode, deciphering module 200 adopts symmetric encipherment algorithm that multimedia is deciphered; Under the server for encrypting mode, deciphering module 200 adopts asymmetrical encryption algorithm that multimedia is deciphered.
In step S606, according to the password generation key of user's input.Because adopt the symmetric encipherment algorithm ciphering multimedia under the local cipher mode, employed key can be the password that the user inputs during encryption and decryption.
In step S608, adopt symmetric encipherment algorithm that multimedia is deciphered.Because symmetric encipherment algorithm all adopts identical key when encryption and decryption.During deciphering, the key that password generated that adopts above-mentioned user's input is as decruption key, and symmetric encipherment algorithm adopts des encryption algorithm and IDEA cryptographic algorithm commonly used to get final product.
In step S610, obtain decruption key from server.Under the server for encrypting mode, deciphering module 200 adopts asymmetrical encryption algorithm that multimedia is deciphered.Because asymmetrical encryption algorithm employed key when encryption and decryption is a pair of PKI and the private key of coupling mutually.When adopting asymmetrical encryption algorithm, need the user to import number of the account and password logon server, and obtain a pair of PKI and the private key of generation, during to this multimedia deciphering, then directly obtain private key and be decrypted from server from server to encrypted multimedia.
In step S612, adopt asymmetrical encryption algorithm that multimedia is deciphered.Asymmetrical encryption algorithm can adopt RSA cryptographic algorithms commonly used and DSA cryptographic algorithm.
Because multimedia data division data volume is very big, when encrypting usually, only multimedia header data is encrypted, during deciphering, then tackle multimedia header data deciphering mutually and get final product.In one embodiment, decipher multimedia header data after, the multimedia after the deciphering is carried out audio/video flow separates, and audio stream and the video flowing after separating is decrypted and handles, audio stream and video flowing after the final playback process.
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 (11)
1. a multimedia transcoding system is characterized in that, described system comprises:
Separation module is used for that multimedia source files is carried out audio/video flow and separates;
Decoder module links to each other with described separation module, and audio stream and video flowing after separating are decoded;
The transcoding module links to each other with decoder module, respectively decoded audio stream and video flowing is carried out transcoding;
Encrypting module is used to obtain the cipher mode of setting, adopts corresponding cryptographic algorithm that multimedia is encrypted according to described cipher mode;
Synthesis module links to each other with described transcoding module and encrypting module, and audio stream behind the transcoding and video flowing is synthetic, the multimedia file after output is encrypted.
2. multimedia transcoding system according to claim 1 is characterized in that, described system also comprises:
Parameter is provided with module, links to each other with described transcoding module, encrypting module and synthesis module, is used to be provided with cipher mode and multimedia parameter.
3. multimedia transcoding system according to claim 2 is characterized in that, the cipher mode that described parameter is provided with the module setting comprises: local cipher mode and server cipher mode.
4. multimedia transcoding system according to claim 3 is characterized in that, described encrypting module also is used for when the cipher mode that gets access to setting is the local cipher mode, adopts symmetric encipherment algorithm that multimedia is encrypted.
5. encrypted multimedia according to claim 3 system is characterized in that described encrypting module also is used for when the cipher mode that gets access to setting is the server for encrypting mode, adopts asymmetrical encryption algorithm that multimedia is encrypted.
6. a multi-media transcoding method is characterized in that, described method comprises:
Multimedia source files is carried out audio/video flow separate, and to the audio stream after separating with video flowing is decoded and transcoding;
Obtain the cipher mode of setting, adopt corresponding cryptographic algorithm that multimedia is encrypted according to described cipher mode;
Audio stream behind the transcoding and video flowing is synthetic, the multimedia file after output is encrypted.
7. multi-media transcoding method according to claim 6 is characterized in that, described method also comprises:
Cipher mode is set, and described cipher mode comprises local cipher mode and server cipher mode.
8. multi-media transcoding method according to claim 7 is characterized in that, the step that multimedia is encrypted comprises: when the cipher mode that obtains is the local cipher mode, adopt symmetric encipherment algorithm that multimedia is encrypted.
9. multi-media transcoding method according to claim 7 is characterized in that, the step that multimedia is encrypted comprises: when the cipher mode that obtains is the server for encrypting mode, adopt asymmetrical encryption algorithm that multimedia is encrypted.
10. multimedia system that plays behind the transcoding is characterized in that described system comprises:
Deciphering module is used to obtain the cipher mode of setting, adopts corresponding cryptographic algorithm that multimedia is decrypted according to described cipher mode;
Separation module links to each other with described deciphering module, the multimedia after the deciphering is carried out audio/video flow separate;
Decoder module links to each other with described separation module, and the audio/video flow after separating is decoded;
The audio frequency and video processing module links to each other with described decoder module, and decoded audio/video flow is handled;
Playing module links to each other audio stream after the playback process and video flowing with described audio frequency and video processing module.
11. a multimedia method of playing behind the transcoding is characterized in that described method comprises:
Obtain the cipher mode of setting, adopt corresponding cryptographic algorithm that multimedia is decrypted according to described cipher mode;
Multimedia after the deciphering is carried out audio/video flow separate, and the audio stream after separating and video flowing are decoded and handled;
Audio stream after the playback process and video flowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101927076A CN102036102A (en) | 2009-09-25 | 2009-09-25 | System and method for transcoding multimedia and system and method for playing multimedia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101927076A CN102036102A (en) | 2009-09-25 | 2009-09-25 | System and method for transcoding multimedia and system and method for playing multimedia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102036102A true CN102036102A (en) | 2011-04-27 |
Family
ID=43888317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101927076A Pending CN102036102A (en) | 2009-09-25 | 2009-09-25 | System and method for transcoding multimedia and system and method for playing multimedia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102036102A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801712A (en) * | 2012-07-17 | 2012-11-28 | 苏州市米想网络信息技术有限公司 | Network communication system adopting intelligent control |
| CN103561262A (en) * | 2013-11-06 | 2014-02-05 | 飞歌康采(北京)软件科技有限公司 | Video transcoding system and method |
| CN105100820A (en) * | 2015-08-18 | 2015-11-25 | 杭州士兰微电子股份有限公司 | Digital media file encoding method, decoding method, encoding device and decoding device |
| CN105337963A (en) * | 2015-09-30 | 2016-02-17 | 北京奇虎科技有限公司 | Multimedia data encryption method and device |
| WO2016138844A1 (en) * | 2015-03-03 | 2016-09-09 | 腾讯科技（深圳）有限公司 | Multimedia file live broadcast method, system and server |
| CN109408668A (en) * | 2018-09-26 | 2019-03-01 | 传线网络科技（上海）有限公司 | The correlating method and device of multimedia content |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1777274A (en) * | 2005-11-29 | 2006-05-24 | 中国科学技术大学 | Flow media content protection method based on motion audio-video stardard file format |
| CN101009641A (en) * | 2006-12-31 | 2007-08-01 | 中国建设银行股份有限公司 | Method and system for transferring large number of data |
| CN101321280A (en) * | 2008-07-22 | 2008-12-10 | 国家广播电影电视总局广播科学研究院 | Real-time video transcoding stream medium server |
-
2009
- 2009-09-25 CN CN2009101927076A patent/CN102036102A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1777274A (en) * | 2005-11-29 | 2006-05-24 | 中国科学技术大学 | Flow media content protection method based on motion audio-video stardard file format |
| CN101009641A (en) * | 2006-12-31 | 2007-08-01 | 中国建设银行股份有限公司 | Method and system for transferring large number of data |
| CN101321280A (en) * | 2008-07-22 | 2008-12-10 | 国家广播电影电视总局广播科学研究院 | Real-time video transcoding stream medium server |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801712A (en) * | 2012-07-17 | 2012-11-28 | 苏州市米想网络信息技术有限公司 | Network communication system adopting intelligent control |
| CN103561262A (en) * | 2013-11-06 | 2014-02-05 | 飞歌康采(北京)软件科技有限公司 | Video transcoding system and method |
| WO2016138844A1 (en) * | 2015-03-03 | 2016-09-09 | 腾讯科技（深圳）有限公司 | Multimedia file live broadcast method, system and server |
| US10187668B2 (en) | 2015-03-03 | 2019-01-22 | Tencent Technology (Shenzhen) Company Limited | Method, system and server for live streaming audio-video file |
| CN105100820A (en) * | 2015-08-18 | 2015-11-25 | 杭州士兰微电子股份有限公司 | Digital media file encoding method, decoding method, encoding device and decoding device |
| CN105100820B (en) * | 2015-08-18 | 2019-05-03 | 杭州士兰微电子股份有限公司 | Coding method, coding/decoding method, code device and the decoding apparatus of digital media file |
| CN105337963A (en) * | 2015-09-30 | 2016-02-17 | 北京奇虎科技有限公司 | Multimedia data encryption method and device |
| CN109408668A (en) * | 2018-09-26 | 2019-03-01 | 传线网络科技（上海）有限公司 | The correlating method and device of multimedia content |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10091173B2 (en) | Electronic device and method of transmitting content item | |
| CN103338385B (en) | Processing system for video and correlation method | |
| CN100563332C (en) | The encrypting/decrypting method of scalable video bit stream and system | |
| US20080291999A1 (en) | Method and apparatus for video frame marking | |
| US10269086B2 (en) | Method and system for secure sharing of recorded copies of a multicast audiovisual program using scrambling and watermarking techniques | |
| CN102036102A (en) | System and method for transcoding multimedia and system and method for playing multimedia | |
| GB2417653A (en) | Multicast delivery of program information using session description messages | |
| JP2007306170A (en) | Information processing system and method, information processor and method, and program | |
| US20130028416A1 (en) | System and method for media transcoding and presentation | |
| KR101343527B1 (en) | Method for Producing and playing Digital Cinema Contents and Apparatus for producing and playing digital cinema contents using the method | |
| CN101390332B (en) | Method and apparatus for synchronous stream cipher encryption with reserved codes | |
| JP6018880B2 (en) | ENCRYPTION DEVICE, DECRYPTION DEVICE, ENCRYPTION PROGRAM, AND DECRYPTION PROGRAM | |
| JP6793364B2 (en) | Content decoding device, content decoding method, receiving device and program | |
| JP2007311842A (en) | Data stream radio transmitter, data stream radio receiver, radio transmission system, imaging apparatus, reproducing apparatus, and data stream radio transmission method and program | |
| JP4667235B2 (en) | Data distribution / reception system and data distribution / reception method | |
| JP2007306171A (en) | Information processing system and method, information processor and method, and program | |
| JP2013150147A (en) | Encryption device, decryption device, encryption program, and decryption program | |
| JP2009124456A (en) | Information processor, information processing method, information processing program, and information recording medium | |
| CN109561345B (en) | Digital movie packaging method based on AVS + coding format | |
| Imaizumi et al. | An efficient access control method for composite multimedia content | |
| US8619996B2 (en) | Apparatus and method for transmitting digital multimedia broadcasting data, and method and apparatus for receiving digital multimedia broadcasting data | |
| CN1812565A (en) | Data ciphering method in mobile communication program | |
| WO2004034705A1 (en) | System for secure distribution, storage and conditional retrieval of multimedia content | |
| JP2002072871A (en) | Processing method for encoding and decoding moving image data, and processing device for encoding and decoding the same | |
| JP2003092566A (en) | Descrambler provided with enciphering/decoding function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110427 |