WO2016206457A1 - 多媒体文件的处理方法及装置 - Google Patents

多媒体文件的处理方法及装置 Download PDF

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Publication number
WO2016206457A1
WO2016206457A1 PCT/CN2016/079743 CN2016079743W WO2016206457A1 WO 2016206457 A1 WO2016206457 A1 WO 2016206457A1 CN 2016079743 W CN2016079743 W CN 2016079743W WO 2016206457 A1 WO2016206457 A1 WO 2016206457A1
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Prior art keywords
multimedia file
information
encoded information
encrypted
encoded
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PCT/CN2016/079743
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English (en)
French (fr)
Inventor
张李伟
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腾讯科技（深圳）有限公司
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Priority to MYPI2017704403A priority Critical patent/MY190879A/en
Publication of WO2016206457A1 publication Critical patent/WO2016206457A1/zh
Priority to US15/666,209 priority patent/US20170329986A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
    • G06F21/6209—Protecting access to data via a platform, e.g. using keys or access control rules to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/10—Services
    • G06Q50/18—Legal services; Handling legal documents
    • G06Q50/184—Intellectual property management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2107—File encryption
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q2220/00—Business processing using cryptography
    • G06Q2220/10—Usage protection of distributed data files
    • G06Q2220/16—Copy protection or prevention

Definitions

  • the present application relates to the field of multimedia technologies, and in particular, to a method and an apparatus for processing a multimedia file.
  • the existing solution is generally to limit the multimedia files that different users can enjoy and download by setting user rights.
  • a multimedia content provider allows a paid user to view and download a particular copyrighted multimedia file.
  • users with permissions can publish downloaded high-quality multimedia files to the network again, so that other users without permissions can also enjoy high-quality multimedia files.
  • the prior art limits piracy to a certain extent, it still cannot fully protect the copyright of digital multimedia information.
  • the present application provides a method and an apparatus for processing a multimedia file, which are used to solve the problem that the prior art cannot guarantee the copyright of digital multimedia information.
  • a method for processing a multimedia file comprising:
  • the new encoded information is encoded to obtain an encoded multimedia file.
  • a method for processing a multimedia file comprising:
  • decoding the target multimedia file to obtain encoding information of the target multimedia file, wherein the encoding information includes encrypted encoded information and unencrypted encoded information;
  • the multimedia playback is performed by using the decrypted encoded information and the unencrypted encoded information.
  • a multimedia file processing apparatus includes:
  • An encoding information acquiring unit configured to acquire encoding information of a multimedia file to be processed
  • An encoding information selecting unit configured to select, in the encoding information, encoding information to be encrypted according to a preset policy
  • An encryption processing unit configured to encrypt the encoded information to be encrypted, and combine the encrypted encoded information and the unencrypted encoded information to form new encoded information
  • an encoding processing unit configured to encode the new encoded information to obtain an encoded multimedia file.
  • a multimedia file processing apparatus includes:
  • a multimedia file decoding unit configured to decode the target multimedia file to obtain encoding information of the target multimedia file, where the encoding information includes encrypted encoding information and an unencrypted encoding, in response to a user triggering an operation of the target multimedia file.
  • a user authority determining unit configured to determine whether the user has the right to decrypt the target multimedia file
  • a first multimedia playing unit configured to perform multimedia playback by using the unencrypted encoded information in the encoded information when the determining result of the user right determining unit is negative;
  • a decryption processing unit configured to decrypt the encrypted encoded information when the determination result of the user authority determining unit is YES, to obtain the decrypted encoded information
  • a second multimedia playing unit configured to perform multimedia playback by using the decrypted encoded information and the unencrypted encoded information.
  • the multimedia file processing method provided by the embodiment of the present application first obtains the encoding information of the multimedia file to be copyright protected, and then selects some of the encoding information as the encoding information to be encrypted, and The encrypted encoded information is encrypted, the encrypted encoded information and the unencrypted encoded information are combined to form new encoded information, and the new encoded information is further encoded to obtain the encoded multimedia file.
  • the user can decrypt and play the lossless multimedia file only if the user has the decryption right of the corresponding multimedia file, so even if the user with the decryption authority transmits the downloaded multimedia file to other users, if other users do not With the decryption right of the multimedia file, it still cannot play the lossless multimedia file, and realizes the protection of the copyright of the multimedia file.
  • the multimedia file processing method of the present application can control the encryption depth of the encoded information by adjusting the preset policy. For a user who does not have the decryption right, although it can not enjoy the multimedia file without loss after decryption, the multimedia file can still be played with low quality, and the playback quality can be controlled by the supplier by adjusting the preset policy.
  • FIG. 1 is a flowchart of a method for processing a multimedia file according to an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a multimedia file processing apparatus according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of an encoding information acquiring unit according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a coding information selection unit according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an encryption processing unit unit according to an embodiment of the present disclosure.
  • FIG. 6 is a flowchart of another method for processing a multimedia file according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of another apparatus for processing a multimedia file according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a server hardware according to an embodiment of the present application.
  • FIG. 1 is a flowchart of a method for processing a multimedia file according to an embodiment of the present application.
  • the method includes:
  • Step S100 Acquire encoding information of a multimedia file to be processed
  • the multimedia file can be music, video, text, etc., and any combination thereof.
  • Step S110 Select coding information to be encrypted in the coding information according to a preset policy.
  • part of the encoded information or all of the encoded information may be selected as the encoded information to be encrypted according to a predetermined policy.
  • the selected policies may be various, for example, according to the position, length, and the like of the encoded information in the total encoded information.
  • Step S120 Encrypt the encoded information to be encrypted, and combine the encrypted encoded information and the unencrypted encoded information to form new encoded information.
  • Some of the encoded information of the multimedia file to be processed is encrypted, and the other part is not encrypted. Then, the encrypted coded information and the unencrypted coded information together constitute new coded information.
  • Step S130 Encoding the new encoded information to obtain an encoded multimedia file.
  • the entropy coding method may be used for encoding, and the encoded multimedia file may be uploaded to the website of the multimedia provider for the user to enjoy and download.
  • the multimedia file processing method provided by the embodiment of the present application first obtains the encoding information for the multimedia file to be copyright protected, and then selects some of the encoding information for encryption processing, and is composed of the encrypted encoding information and the unencrypted encoding information. Newly encoded information, and further encode the new encoded information to obtain the encoded multimedia file.
  • the user can decrypt the encrypted information to play the lossless multimedia file only if the user has the decryption right of the corresponding multimedia file, so even if the user having the decryption authority transmits the downloaded multimedia file to other users, If other users do not have the decryption right of the multimedia file, they still cannot play the lossless multimedia file, thereby realizing the protection of the copyright of the multimedia file.
  • the multimedia file processing method of the present application can control the encryption depth of the encoded information by adjusting the preset policy. For a user who does not have the decryption right, although it can not enjoy the multimedia file without loss after decryption, the multimedia file can still be played with low quality, and the playback quality can be controlled by the supplier by adjusting the preset policy.
  • a multimedia file provider can provide an application application for a user to enjoy multimedia, such as a music player or a video player, and such an application can play a pre-stored or server-issued copy when playing an encrypted multimedia file.
  • the decryption algorithm corresponding to the multimedia file decrypts the decoded multimedia file, and then Can play non-destructive multimedia files.
  • a user A has the right to access the word document, that is, it has the right to decrypt the encrypted text in the word document, when the user A consults the word document, all the encrypted words in the word document can be decrypted and displayed. Ability to browse the full word document.
  • a user B does not have the right to query the word document, that is, it does not have the right to decrypt the encrypted text in the word document, when the user B refers to the word document, it can only browse the unencrypted text in the word document. , can not be seen for encrypted text.
  • the quality of the multimedia file viewed by the user who does not have the authority can be controlled by adjusting the preset policy.
  • the encoding information of the multimedia file to be processed may be obtained by decoding the compressed multimedia file to be processed. Since the encoding compression is generally performed by entropy coding in the prior art, decoding can also be performed in the form of entropy decoding during decoding.
  • a plurality of encryption algorithms may be used when encrypting the encoded information to be encrypted.
  • a permutation encryption algorithm may be used.
  • the multimedia file format processed by the replacement encryption algorithm is compatible, that is, for users who do not have the decryption right, it uses other multimedia players for playback, but the multimedia quality will be reduced, and the multimedia quality can be encrypted. Depth to control.
  • the encryption process of encoding information is introduced in conjunction with an embodiment of the present application.
  • the encoding information described herein may include quantization parameters and a number of DCT (Discrete Cosine Transform) coefficients. Therefore, the quantization parameter can be selected as the coding information to be encrypted, and the quantization parameter is encrypted.
  • DCT Discrete Cosine Transform
  • a predetermined number of DCT coefficients in a plurality of DCT coefficients may be selected for encryption processing, and specific DCT coefficients may be selected for encryption, which may be set in advance.
  • a multimedia file is used as an example for music.
  • the song A can be encrypted in the manner of the above embodiment of the present application, and the encrypted song A is posted to the target website of the supplier 1. Then, the supplier 1 can set the paid member user to have the decryption right of the song A, that is, the paid member user can enjoy the lossless song A. Then, when a paid member successfully logs into the target website, when the click song A is clicked, the player provided by the target website can acquire the decryption algorithm corresponding to the song A, then decode and decrypt the song A, and finally realize the lossless playback of the song A. .
  • the present application does not encrypt the multimedia file, but only encrypts part of the encoded information in the encoded information of the multimedia file, so that non-member users who do not have the decryption right can also enjoy low-quality multimedia files. Can improve the friendliness of non-member users.
  • the processing device of the multimedia file provided by the embodiment of the present application is described below.
  • the processing device of the multimedia file described below and the processing method of the multimedia file described above may refer to each other.
  • FIG. 2 is a schematic structural diagram of a device for processing a multimedia file according to an embodiment of the present application.
  • the device comprises:
  • the encoding information acquiring unit 21 is configured to acquire encoding information of the multimedia file to be processed
  • the encoding information selecting unit 22 is configured to select, in the encoding information, encoding information to be encrypted according to a preset policy
  • the encryption processing unit 23 is configured to encrypt the encoded information to be encrypted, and combine the encrypted encoded information and the unencrypted encoded information to form new encoded information.
  • the encoding processing unit 24 is configured to encode the new encoded information to obtain an encoded multimedia file.
  • the foregoing encoding information acquiring unit 21 may include:
  • a first encoding information obtaining subunit 211 configured to decode the compressed multimedia file to be processed, Encoding information to the multimedia file to be processed.
  • the encoding information includes a quantization parameter and a plurality of discrete cosine transform DCT coefficients.
  • the encoding information selecting unit 22 may include:
  • a first encoding information selecting sub-unit 221, configured to select a quantization parameter in the encoding information, and determine the quantization parameter as encoding information to be encrypted;
  • the second encoding information selecting sub-unit 222 is configured to select all discrete cosine transform DCT coefficients in the encoding information, and determine a preset number of discrete cosine transform DCT coefficients as the encoding information to be encrypted.
  • the foregoing encryption processing unit 23 may include:
  • the first encryption processing sub-unit 231 is configured to encrypt the encoded information to be encrypted by using a permutation encryption algorithm.
  • the multimedia file processing apparatus first obtains the encoding information of the multimedia file to be copyright protected, and then selects some of the encoding information as the encoding information to be encrypted, and encrypts the encrypted encoded information.
  • the newly encoded information is composed of the encrypted encoded information and the unencrypted encoded information, and the new encoded information is further encoded to obtain the encoded multimedia file.
  • the user can decrypt and play the lossless multimedia file only if the user has the decryption right of the corresponding multimedia file, so even if the user with the decryption authority transmits the downloaded multimedia file to other users, if other users do not With the decryption right of the multimedia file, it still cannot play the lossless multimedia file, and realizes the protection of the copyright of the multimedia file.
  • the multimedia file processing apparatus of the present application can control the encryption depth of the encoded information by adjusting the preset policy. For a user who does not have the decryption right, although it can not enjoy the multimedia file without loss after decryption, the multimedia file can still be played with low quality, and the playback quality can be controlled by the supplier by adjusting the preset policy.
  • another method for processing a multimedia file is provided for playing a multimedia file processed according to the above method.
  • the method of this embodiment can be applied to a player that is a player provided on a website of a multimedia provider.
  • FIG. 6 is a flowchart of another method for processing a multimedia file according to an embodiment of the present application.
  • the method includes:
  • Step S600 Performing an operation of the target multimedia file in response to the user, performing the target multimedia file Decoding to obtain coding information of the target multimedia file;
  • the player when the user clicks and the like to trigger the target multimedia file, the player receives the target multimedia file and decodes the target multimedia file, and can decode using entropy decoding.
  • the encoding information of the target multimedia file can be obtained by decoding.
  • the encoded information comprises encrypted encoded information and unencrypted encoded information.
  • Step S610 determining whether the user has the authority to decrypt the target multimedia file; if not, executing step S620, and if yes, executing step S630;
  • Step S620 Perform multimedia playback by using unencrypted information in the encoded information.
  • whether the user has the right to decrypt the target multimedia file can be determined by determining whether the user has purchased the copyright of the target multimedia file or determining whether the identity of the user meets the preset condition. For example, a website can upgrade a paying user to a member user, and the member user has the decryption right of all multimedia files in the website.
  • the encoded information is directly used for multimedia playback.
  • the encoded information contains partially encrypted encoded information, multimedia playback can still be realized, but the multimedia quality of the playback will be degraded. .
  • Step S630 decrypting the encrypted encoded information to obtain decrypted encoded information.
  • the decryption may be performed using a preset decryption algorithm corresponding to the target multimedia file.
  • the preset decryption algorithm corresponding to the target multimedia file matches the encryption algorithm used when the target multimedia file is encrypted.
  • the decryption algorithm may be pre-stored in the player or temporarily obtained from the server, which is not limited in this application.
  • Step S640 performing multimedia playback by using the decrypted encoded information and the unencrypted encoded information.
  • the encoded information of the encrypted file does not exist in the encoded information of the multimedia file, so that the lossless playback of the multimedia file can be realized.
  • the decoder corresponding to the format may be selected according to the format of the multimedia file to decode the encoded information to obtain multimedia data, thereby implementing multimedia playback.
  • the multimedia file clicked by the user may be a non-encrypted multimedia file, and when the user authority is judged, the situation may be determined as the user having the right to decrypt the target multimedia file, and then the target is acquired.
  • the decryption algorithm of the multimedia file it is obviously impossible to obtain the decryption algorithm, and thus it is not There is an operation of decrypting encoded information.
  • the processing may be performed according to the existing processing flow.
  • the method for processing a multimedia file provided by the embodiment of the present application, when the user triggers the target multimedia file, decodes the target multimedia file, obtains the encoded information, and then verifies the user identity, and if it is determined that the user does not have the permission to decrypt the target multimedia file, Directly using the encoded information for multimedia playback, the quality of the multimedia file played by the playback mode will be reduced; if the user is determined to have the right to decrypt the target multimedia file, the decryption algorithm corresponding to the target multimedia file is called to decrypt the encoded information. And use the decrypted encoded information for multimedia playback, so that the played multimedia file is a lossless multimedia file with high quality.
  • the present application further provides a processing device for a multimedia file, which corresponds to the processing method of the multimedia file, and the processing device of the multimedia file can be applied to the player.
  • FIG. 7 is a schematic structural diagram of a device for processing a multimedia file according to an embodiment of the present application.
  • the device includes:
  • the multimedia file decoding unit 71 is configured to: in response to the user triggering the operation of the target multimedia file, decoding the target multimedia file to obtain encoding information of the target multimedia file;
  • the user authority determining unit 72 is configured to determine whether the user has the right to decrypt the target multimedia file
  • the first multimedia playing unit 73 is configured to perform multimedia playback by using the encoded information when the determination result of the user authority determining unit is negative;
  • the decryption processing unit 74 is configured to: when the determination result of the user authority determining unit is YES, decrypt the encoded information by using a preset decryption algorithm corresponding to the target multimedia file, to obtain the decrypted encoded information, The preset decryption algorithm corresponding to the target multimedia file is matched with the encryption algorithm used when the target multimedia file is encrypted;
  • the second multimedia playing unit 75 is configured to perform multimedia playback by using the decrypted encoded information.
  • the multimedia file processing apparatus when the user triggers the target multimedia file, decodes the target multimedia file, obtains the encoded information, and then verifies the user identity, if it is determined that it does not have If the permission to decrypt the target multimedia file is used, the encoded information is directly used for multimedia playback, and the quality of the multimedia file played by the playback mode is reduced; if it is determined that the user has the right to decrypt the target multimedia file, the call corresponds to the target multimedia file.
  • the decryption algorithm decrypts the encoded information, and uses the decrypted encoded information to perform multimedia playback, so that the played multimedia file is a lossless multimedia file with high quality.
  • the embodiment of the present application further provides a server, which may include the processing device of the multimedia file described in FIG. 2 above.
  • a server which may include the processing device of the multimedia file described in FIG. 2 above.
  • the processing device of the multimedia file reference may be made to the corresponding part in the above description, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of a hardware of a server according to an embodiment of the present disclosure.
  • the server may include:
  • Processor 1 communication interface 2, memory 3, communication bus 4, and display screen 5;
  • the processor 1, the communication interface 2, the memory 3, and the display screen 5 complete communication with each other through the communication bus 4;
  • the communication interface 2 can be an interface of the communication module, such as an interface of the GSM module;
  • a processor 1 for executing a program
  • a memory 3 for storing a program
  • the program can include program code, the program code including operational instructions of the processor.
  • the processor 1 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • the memory 3 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • the program can be specifically used to:
  • the new encoded information is encoded to obtain an encoded multimedia file.

Abstract

本申请公开了一种多媒体文件的处理方法及装置，对于待处理多媒体文件首先获取其编码信息，然后选取其中部分编码信息作为待加密的编码信息，并对待加密的编码信息进行加密处理，由加密后的编码信息和未加密的编码信息组成新编码信息，并进一步对新编码信息进行编码，得到编码后的多媒体文件。本方案能更好地实现对多媒体文件的版权保护。

Description

多媒体文件的处理方法及装置
本申请要求于2015年6月24日提交中国专利局、申请号为201510354082.4、发明名称为“一种多媒体文件的处理方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及多媒体技术领域，更具体地说，涉及一种多媒体文件的处理方法及装置。
背景技术
随着移动互联网技术的发展，越来越多的多媒体内容提供商通过网络发布和销售高品质的多媒体信息。而由于互联网的不可控性以及数字媒体无损的拷贝和传播等特性，使得对于数字多媒体信息的版权保护变得非常困难。
针对这种问题，现有的解决方法一般是通过设置用户权限来限制不同用户所能够欣赏和下载的多媒体文件。例如，多媒体内容提供商对于付费用户才允许欣赏和下载特定版权的多媒体文件。但是，具备权限的用户可以将下载的高品质多媒体文件再次发布到网络上，这样其它不具备权限的用户也可以欣赏到高品质的多媒体文件。显然，现有技术虽然在一定程度上限制了盗版行为，但是，仍旧无法完全保护数字多媒体信息的版权。
发明内容
有鉴于此，本申请提供了一种多媒体文件的处理方法及装置，用于解决现有技术无法保证数字多媒体信息版权的问题。
为了实现上述目的，现提出的方案如下：
一种多媒体文件的处理方法，包括：
获取待处理多媒体文件的编码信息；
按照预置策略在所述编码信息中选取待加密的编码信息；
对所述待加密的编码信息进行加密，由加密后的编码信息和未加密的编码信息组成新编码信息；
对所述新编码信息进行编码，得到编码后的多媒体文件。
一种多媒体文件的处理方法，包括：
响应用户触发目标多媒体文件的操作，对所述目标多媒体文件进行解码，得到所述目标多媒体文件的编码信息，其中所述编码信息包括加密的编码信息和未加密的编码信息；
判断所述用户是否具备解密所述目标多媒体文件的权限；
若否，则利用所述编码信息中未加密的编码信息进行多媒体播放；
若是，则对所述加密的编码信息进行解密，得到解密后的编码信息；
利用所述解密后的编码信息和所述未加密的编码信息进行多媒体播放。
一种多媒体文件的处理装置，包括：
编码信息获取单元，用于获取待处理多媒体文件的编码信息；
编码信息选取单元，用于按照预置策略在所述编码信息中选取待加密的编码信息；
加密处理单元，用于对所述待加密的编码信息进行加密，由加密后的编码信息和未加密的编码信息组成新编码信息；以及
编码处理单元，用于对所述新编码信息进行编码，得到编码后的多媒体文件。
一种多媒体文件的处理装置，包括：
多媒体文件解码单元，用于响应用户触发目标多媒体文件的操作，对所述目标多媒体文件进行解码，得到所述目标多媒体文件的编码信息，其中所述编码信息包括加密的编码信息和未加密的编码信息；
用户权限判断单元，用于判断所述用户是否具备解密所述目标多媒体文件的权限；
第一多媒体播放单元，用于在所述用户权限判断单元的判断结果为否时，利用所述编码信息中未加密的编码信息进行多媒体播放；
解密处理单元，用于在所述用户权限判断单元的判断结果为是时，对所述加密的编码信息进行解密，得到解密后的编码信息；
第二多媒体播放单元，用于利用所述解密后的编码信息和所述未加密的编码信息进行多媒体播放。
从上述的技术方案可以看出，本申请实施例提供的多媒体文件的处理方法，对于待进行版权保护的多媒体文件，首先获取其编码信息，然后选取其中部分编码信息作为待加密的编码信息，并对待加密的编码信息进行加密处理，由加密后的编码信息和未加密的编码信息组成新编码信息，并进一步对新编码信息进行编码，得到编码后的多媒体文件。按照本申请方案提供的多媒体文件，用户只有具备对应多媒体文件的解密权限才能够解密并播放无损的多媒体文件，因此，即便拥有解密权限的用户将下载的多媒体文件传给其它用户，若其它用户不具备该多媒体文件的解密权限，其仍旧无法播放无损的多媒体文件，实现了对多媒体文件版权的保护。
进一步，本申请的多媒体文件处理方法可以通过调整所述预置策略来控制编码信息的加密深度。对于不具备解密权限的用户来说，其虽然无法享受到解密后无损的多媒体文件，但是仍能够对多媒体文件进行低品质播放，且播放品质可以由供应商通过调整所述预置策略来控制。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本申请实施例公开的一种多媒体文件的处理方法流程图；
图2为本申请实施例公开的一种多媒体文件的处理装置结构示意图；
图3为本申请实施例公开的一种编码信息获取单元结构示意图；
图4为本申请实施例公开的一种编码信息选取单元结构示意图；
图5为本申请实施例公开的一种加密处理单元单元结构示意图；
图6为本申请实施例公开的另一种多媒体文件的处理方法流程图；
图7为本申请实施例公开的另一种多媒体文件的处理装置结构示意图；
图8为本申请实施例公开的一种服务器硬件结构示意图。
具体实施方式
参见图1，图1为本申请实施例公开的一种多媒体文件的处理方法流程图。
如图1所述，该方法包括：
步骤S100、获取待处理多媒体文件的编码信息；
对于需要进行版权保护的多媒体文件，可以按照本申请的方案进行如下处理。多媒体文件可以是音乐、视频、文本等及其任意组合。
步骤S110、按照预置策略在所述编码信息中选取待加密的编码信息；
对于获取的编码信息，可以按照预定的策略来选取其中的部分编码信息或者全部编码信息作为待加密的编码信息。
可以理解的是，选取的待加密的编码信息越多，意味着加密深度越高。
所述选取的策略可以有多种，例如根据编码信息在总的编码信息中的位置、长度等进行选取。
步骤S120、对所述待加密的编码信息进行加密，由加密后的编码信息和未加密的编码信息组成新编码信息；
待处理多媒体文件的编码信息中，部分进行了加密，另一部分未进行加密。则由加密后的编码信息和未加密的编码信息共同组成新编码信息。
步骤S130、对所述新编码信息进行编码，得到编码后的多媒体文件。
具体地，对于多媒体文件而言，可以使用熵编码方式进行编码，编码后的多媒体文件可以上传到多媒体提供商的网站上，以供用户欣赏和下载。
本申请实施例提供的多媒体文件的处理方法，对于待进行版权保护的多媒体文件，首先获取其编码信息，然后选取其中部分编码信息进行加密处理，由加密后的编码信息和未加密的编码信息组成新编码信息，并进一步对新编码信息进行编码，得到编码后的多媒体文件。按照本申请方案提供的多媒体文件，用户只有具备对应多媒体文件的解密权限才能够解密其中加密的信息从而播放无损的多媒体文件，因此，即便拥有解密权限的用户将下载的多媒体文件传给其它用户，若其它用户不具备该多媒体文件的解密权限，其仍旧无法播放无损的多媒体文件，实现了对多媒体文件版权的保护。
进一步，本申请的多媒体文件处理方法可以通过调整所述预置策略来控制编码信息的加密深度。对于不具备解密权限的用户来说，其虽然无法享受到解密后无损的多媒体文件，但是仍能够对多媒体文件进行低品质播放，且播放品质可以由供应商通过调整所述预置策略来控制。
一般性的，多媒体文件供应商可以提供用户欣赏多媒体的应用APP，例如音乐播放器或视频播放器等，此类应用在播放加密处理过的多媒体文件时，能够根据预存的或服务器下发的与多媒体文件对应的解密算法对解码后的多媒体文件进行解密，然后即 可播放无损的多媒体文件。
为了便于理解本申请方案，下面以一个比较形象的例子来说明：
将多媒体文件看作一份word文档，word文档内包括100个文字。每个文字均可以看作编码信息。则按照本申请的方法，可以选择对100个文字中，从第1个开始，每隔10个文字对1个文字进行加密。加密后得到一份新的word文档。
如果一个用户A具备查阅该word文档的权限，也即其具备对word文档内加密文字进行解密权限，则在用户A查阅该word文档时，能够将word文档中所有加密的文字全部解密显示，因此能够浏览完整的word文档。
而如果一个用户B不具备查询该word文档的权限，也即其不具备对word文档内加密文字进行解密权限，则在用户B查阅该word文档时，其仅能够浏览word文档中未加密的文字，对于加密的文字则无法看到。
可以通过调整所述预置策略，来控制不具备权限的用户所观看的多媒体文件的品质。
可选的，可以通过对已压缩的待处理多媒体文件进行解码的方式，获得待处理多媒体文件的编码信息。而由于现有技术中一般采用熵编码的方式进行编码压缩，因此在解码时也可以采用熵解码的形式进行解码。
可选的，对待加密的编码信息进行加密时可以使用多种加密算法，优选地，可以使用置换加密算法。采用置换加密算法处理后的多媒体文件格式是兼容的，也即对于不具备解密权限的用户来说，其使用其它多媒体播放器进行播放，只是多媒体品质将会降低，多媒体品质的高低可以通过加密的深度来控制。
结合本申请的一个实施例，对编码信息的加密处理过程进行介绍。
本领域技术人员可以理解的，本文所述的编码信息可以包括量化参数和若干DCT(Discrete Cosine Transform，离散余弦转换)系数。因此，可以选择其中的量化参数作为待加密的编码信息，对量化参数进行加密处理。当然，可以选择对若干DCT系数中的预设数量的DCT系数进行加密处理，至于具体选择哪些DCT系数进行加密，可以预先进行设定。除此之外，还可以选择对量化参数和预设数量的DCT系数均进行加密处理。
可以理解的是，加密的编码信息越多，加密深度越深。对于不具备解密权限的 用户来说，其欣赏的多媒体文件的品质也会越低。
接下来以多媒体文件为音乐进行示例说明。
假设供应商1想保护歌曲A的版权，则可以按照本申请上述实施例的方式对歌曲A进行加密处理，并将加密处理后的歌曲A发布至供应商1的目标网站中。然后，供应商1可以设定付费的会员用户才具备歌曲A的解密权限，也即付费的会员用户才能够欣赏无损的歌曲A。则当某一付费会员成功登录目标网站后，在点击播放歌曲A时，目标网站提供的播放器能够获取歌曲A对应的解密算法，然后对歌曲A进行解码、解密，最后实现歌曲A的无损播放。
即便付费的会员将歌曲A下载到本地，然后将其再次传给其它非付费用户，由于非付费用户没有歌曲A的解密权限，因此其无论使用何种播放器，均无法对歌曲A的加密的编码信息进行解密，也就无法播放无损的歌曲A，从而达到了对歌曲A版权的保护。
此外，本申请并非是对多媒体文件进行全加密，而是仅对多媒体文件的编码信息中的部分编码信息进行加密，使得不具备解密权限的非会员用户也可以享受到低品质的多媒体文件，因此能够提高非会员用户的友好度。
下面对本申请实施例提供的多媒体文件的处理装置进行描述，下文描述的多媒体文件的处理装置与上文描述的多媒体文件的处理方法可相互对应参照。
参见图2，图2为本申请实施例公开的一种多媒体文件的处理装置结构示意图。
如图2所示，该装置包括：
编码信息获取单元21，用于获取待处理多媒体文件的编码信息；
编码信息选取单元22，用于按照预置策略在所述编码信息中选取待加密的编码信息；
加密处理单元23，用于对所述待加密的编码信息进行加密，由加密后的编码信息和未加密的编码信息组成新编码信息；
编码处理单元24，用于对所述新编码信息进行编码，得到编码后的多媒体文件。
可选的，如图3所示，上述编码信息获取单元21可以包括：
第一编码信息获取子单元211，用于对已压缩的待处理多媒体文件进行解码，得 到所述待处理多媒体文件的编码信息。
可选的，所述编码信息包括量化参数和若干个离散余弦转换DCT系数。如图4所示，所述编码信息选取单元22可以包括：
第一编码信息选取子单元221，用于在所述编码信息中选取量化参数，将所述量化参数确定为待加密的编码信息；
第二编码信息选取子单元222，用于在所述编码信息中选取所有的离散余弦转换DCT系数，将其中预设数量的离散余弦转换DCT系数确定为待加密的编码信息。
可选的，如图5所示，上述加密处理单元23可以包括：
第一加密处理子单元231，用于采用置换加密算法，对所述待加密的编码信息进行加密。
本申请实施例提供的多媒体文件的处理装置，对于待进行版权保护的多媒体文件，首先获取其编码信息，然后选取其中部分编码信息作为待加密的编码信息，并对待加密的编码信息进行加密处理，由加密后的编码信息和未加密的编码信息组成新编码信息，并进一步对新编码信息进行编码，得到编码后的多媒体文件。按照本申请装置提供的多媒体文件，用户只有具备对应多媒体文件的解密权限才能够解密并播放无损的多媒体文件，因此，即便拥有解密权限的用户将下载的多媒体文件传给其它用户，若其它用户不具备该多媒体文件的解密权限，其仍旧无法播放无损的多媒体文件，实现了对多媒体文件版权的保护。
进一步，本申请的多媒体文件处理装置可以通过调整所述预置策略来控制编码信息的加密深度。对于不具备解密权限的用户来说，其虽然无法享受到解密后无损的多媒体文件，但是仍能够对多媒体文件进行低品质播放，且播放品质可以由供应商通过调整所述预置策略来控制。
在本申请的另一个实施例中，提供了另外一种多媒体文件的处理方法，用于对按照上述方法处理得到的多媒体文件进行播放。本实施例的方法可以应用于播放器中，该播放器为多媒体供应商的网站上所提供的播放器。
参见图6，图6为本申请实施例公开的另一种多媒体文件的处理方法流程图。
如图6所示，该方法包括：
步骤S600、响应用户触发目标多媒体文件的操作，对所述目标多媒体文件进行 解码，得到所述目标多媒体文件的编码信息；
具体地，当用户点击等操作触发目标多媒体文件时，播放器会接收到该目标多媒体文件并对目标多媒体文件进行解码，解码时可以使用熵解码的方式进行解码。通过解码可以得到目标多媒体文件的编码信息。
根据本发明实施例，所述编码信息包括加密的编码信息和未加密的编码信息。
步骤S610、判断所述用户是否具备解密所述目标多媒体文件的权限；若否，则执行步骤S620，若是，则执行步骤S630；
步骤S620、利用所述编码信息中未加密的信息进行多媒体播放；
具体地，可以通过判断用户是否已经购买了目标多媒体文件的版权，或者判断用户的身份是否符合预置条件来确定其是否具备解密所述目标多媒体文件的权限。举例如，网站可以将付费用户升级为会员用户，会员用户具备该网站中所有多媒体文件的解密权限。
当检测到用户不具备解密目标多媒体文件的权限时，直接利用编码信息进行多媒体播放，此时虽然编码信息中含有部分加密的编码信息，但是仍旧能够实现多媒体播放，只是播放的多媒体品质将会下降。
步骤S630、对所述加密的编码信息进行解密，得到解密后的编码信息；
根据本发明的实施例，可以利用预置的与所述目标多媒体文件对应的解密算法进行所述解密。
其中，预置的与所述目标多媒体文件对应的解密算法，与所述目标多媒体文件加密时采用的加密算法匹配。该解密算法可以预先存储在播放器中，也可以从服务器中临时获取，对此本申请不进行限定。
步骤S640、利用所述解密后的编码信息以及所述未加密的编码信息进行多媒体播放。
经过解密处理，多媒体文件的编码信息中不存在加密处理的编码信息，因而可以实现多媒体文件的无损播放。具体播放时，可以根据多媒体文件的格式而选择对应格式的解码器对编码信息进行解码，得到多媒体数据，从而实现多媒体播放。
需要说明的是，某些情况下用户点击的多媒体文件可能为非加密的多媒体文件，则在进行用户权限判断时，可以将这种情况判定为用户具备解密目标多媒体文件的权限，进而在获取目标多媒体文件的解密算法时，显然将无法获取解密算法，因而也就不 存在对编码信息进行解密的操作。
当然，除此之外，还可以在用户触发目标多媒体文件时首先判断目标多媒体文件是否为加密的多媒体文件，若是则按照图6所示的流程处理，否则可以按照现有的处理流程进行处理。
本申请实施例提供的多媒体文件的处理方法，在用户触发目标多媒体文件时，对目标多媒体文件进行解码，得到编码信息，然后对用户身份进行验证，若确定其不具备解密目标多媒体文件的权限，则直接利用编码信息进行多媒体播放，此种播放方式所播放的多媒体文件的品质将会降低；若确定用户具备解密目标多媒体文件的权限，则调用与目标多媒体文件对应的解密算法对编码信息进行解密，并利用解密后的编码信息进行多媒体播放，这样播放的多媒体文件是无损的多媒体文件，品质较高。
基于上述图6所示的多媒体文件的处理方法，本申请还提供了一种多媒体文件的处理装置，其与上述多媒体文件的处理方法相互对应，该多媒体文件的处理装置可以应用于播放器中。
参见图7，图7为本申请实施例公开的一种多媒体文件的处理装置结构示意图。
如图7所示，该装置包括：
多媒体文件解码单元71，用于响应用户触发目标多媒体文件的操作，对所述目标多媒体文件进行解码，得到所述目标多媒体文件的编码信息；
用户权限判断单元72，用于判断所述用户是否具备解密所述目标多媒体文件的权限；
第一多媒体播放单元73，用于在所述用户权限判断单元的判断结果为否时，利用所述编码信息进行多媒体播放；
解密处理单元74，用于在所述用户权限判断单元的判断结果为是时，利用预置的与所述目标多媒体文件对应的解密算法对所述编码信息进行解密，得到解密后的编码信息，其中，预置的与所述目标多媒体文件对应的解密算法，与所述目标多媒体文件加密时采用的加密算法匹配；
第二多媒体播放单元75，用于利用所述解密后的编码信息进行多媒体播放。
本申请实施例提供的多媒体文件的处理装置，在用户触发目标多媒体文件时，对目标多媒体文件进行解码，得到编码信息，然后对用户身份进行验证，若确定其不具 备解密目标多媒体文件的权限，则直接利用编码信息进行多媒体播放，此种播放方式所播放的多媒体文件的品质将会降低；若确定用户具备解密目标多媒体文件的权限，则调用与目标多媒体文件对应的解密算法对编码信息进行解密，并利用解密后的编码信息进行多媒体播放，这样播放的多媒体文件是无损的多媒体文件，品质较高。
本申请实施例还提供一种服务器，该服务器可以包括上述图2所述的多媒体文件的处理装置，对于多媒体文件的处理装置的描述可参照上文对应部分描述，此处不再赘述。
下面对本申请实施例提供的服务器的硬件结构进行描述，下文描述中涉及多媒体文件处理的部分可参照上文对应部分描述。图8为本申请实施例提供的服务器的硬件结构示意图，参照图8，该服务器可以包括：
处理器1，通信接口2，存储器3，通信总线4，和显示屏5；
其中处理器1、通信接口2、存储器3和显示屏5通过通信总线4完成相互间的通信；
可选的，通信接口2可以为通信模块的接口，如GSM模块的接口；
处理器1，用于执行程序；
存储器3，用于存放程序；
程序可以包括程序代码，所述程序代码包括处理器的操作指令。
处理器1可能是一个中央处理器CPU，或者是特定集成电路ASIC(Application Specific Integrated Circuit)，或者是被配置成实施本申请实施例的一个或多个集成电路。
存储器3可能包含高速RAM存储器，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。
其中，程序可具体用于：
获取待处理多媒体文件的编码信息；
按照预置策略在所述编码信息中选取待加密的编码信息；
对所述待加密的编码信息进行加密，由所述加密后的编码信息和未加密的编码信息组成新编码信息；
对所述新编码信息进行编码，得到编码后的多媒体文件。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (12)

  1. 一种多媒体文件的处理方法，包括：
    获取待处理多媒体文件的编码信息；
    按照预置策略在所述编码信息中选取待加密的编码信息；
    对所述待加密的编码信息进行加密，由加密后的编码信息和未加密的编码信息组成新编码信息；以及
    对所述新编码信息进行编码，得到编码后的多媒体文件。
  2. 根据权利要求1所述的方法，其中，所述待加密的编码信息包括所述多媒体文件的量化参数和所述多媒体文件的离散余弦转换系数中的至少一种。
  3. 根据权利要求2所述的方法，其中，所述按照预置策略在所述编码信息中选取待加密的编码信息，包括以下操作的至少之一：
    在所述编码信息中选取所述量化参数确定为待加密的编码信息；以及
    将预设数量的离散余弦转换DCT系数确定为待加密的编码信息。
  4. 根据权利要求1-3任一项所述的方法，其中，所述对所述待加密的编码信息进行加密，包括：
    采用置换加密算法，对所述待加密的编码信息进行加密。
  5. 根据权利要求1所述的方法，其中，所述获取待处理多媒体文件的编码信息，包括：
    对已压缩的待处理多媒体文件进行解码，得到所述待处理多媒体文件的编码信息。
  6. 一种多媒体文件的处理方法，包括：
    响应用户触发目标多媒体文件的操作，对所述目标多媒体文件进行解码，得到所述目标多媒体文件的编码信息，其中所述编码信息包括加密的编码信息和未加密的编码信息；
    判断所述用户是否具备解密所述目标多媒体文件的权限；
    若否，则利用所述编码信息中未加密的编码信息进行多媒体播放；
    若是，则对所述加密的编码信息进行解密，得到解密后的编码信息；以及
    利用所述解密后的编码信息和所述未加密的编码信息进行多媒体播放。
  7. 一种多媒体文件的处理装置，包括：
    编码信息获取单元，用于获取待处理多媒体文件的编码信息；
    编码信息选取单元，用于按照预置策略在所述编码信息中选取待加密的编码信息；
    加密处理单元，用于对所述待加密的编码信息进行加密，由加密后的编码信息和未加密的编码信息组成新编码信息；以及
    编码处理单元，用于对所述新编码信息进行编码，得到编码后的多媒体文件。
  8. 根据权利要求7所述的装置，其中，所述待加密的编码信息包括所述多媒体文件的量化参数和所述多媒体文件的离散余弦转换系数中的至少一种。
  9. 根据权利要求8所述的装置，其中，所述编码信息选取单元被配置为进行以下操作中的至少之一：
    在所述编码信息中选取所述量化参数确定为待加密的编码信息；以及
    将预设数量的离散余弦转换DCT系数确定为待加密的编码信息。
  10. 根据权利要求7-9任一项所述的装置，其中，所述加密处理单元被配置为：
    采用置换加密算法，对所述待加密的编码信息进行加密。
  11. 根据权利要求7所述的装置，其中，所述编码信息获取单元被配置为：
    对已压缩的待处理多媒体文件进行解码，得到所述待处理多媒体文件的编码信息。
  12. 一种多媒体文件的处理装置，包括：
    多媒体文件解码单元，用于响应用户触发目标多媒体文件的操作，对所述目标多媒体文件进行解码，得到所述目标多媒体文件的编码信息，其中所述编码信息包括加密的编码信息和未加密的编码信息；
    用户权限判断单元，用于判断所述用户是否具备解密所述目标多媒体文件的权限；
    第一多媒体播放单元，用于在所述用户权限判断单元的判断结果为否时，利用所述编码信息中未加密的编码信息进行多媒体播放；
    解密处理单元，用于在所述用户权限判断单元的判断结果为是时，对所述加密的编码信息进行解密，得到解密后的编码信息；以及
    第二多媒体播放单元，用于利用所述解密后的编码信息和所述未加密的编码信息进行多媒体播放。
PCT/CN2016/079743 2015-06-24 2016-04-20 多媒体文件的处理方法及装置 WO2016206457A1 (zh)

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