CN102377974A - Mobile terminal, receiving end and video acquiring method and system - Google Patents
Mobile terminal, receiving end and video acquiring method and system Download PDFInfo
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Abstract
The invention discloses a mobile terminal, a receiving end and a video acquiring method and system. The video acquiring method comprises the steps of: acquiring video data by the mobile terminal; acquiring identification information of the mobile terminal, and embedding the identification information to the video data in a watermark manner; and sending the video data to the receiving end. According to the invention, by adding the identification information in a video, the counterfeit of the video data is prevented. by adding the identification information in the invisible watermark manner, one the one hand, the information, such as the place, the time and the like, for acquiring the video can be reflected, and on the other hand, a video picture cannot be influenced, and the identification information cannot be perceived or noticed by the perception system of a human body; and the information can be ensured to be recovered under the condition of higher error rate of a wireless network.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of portable terminal, receiving terminal, video capture method and system.
Background technology
The development of mobile communication technology makes that mobile terminal devices such as mobile phone are more and more general.Simultaneously, the function of mobile terminal device and performance not only as the means of voice call, also can provide the multi-media communication that comprises video also from strength to strength, and for example visual telephone, mobile phone are live etc.On this basis, derive numerous application again, for example routine is patrolled and examined, car damage identification etc.
Under some was used, for example routine was patrolled and examined, and needed to confirm the accuracy of video data acquiring, to prevent to forge the video acquisition data conditions.
Summary of the invention
The technical problem that the present invention will solve provides the method that a kind of mobile terminal video is gathered, and can guarantee the authenticity of video data.
One aspect of the present invention provides a kind of mobile terminal video acquisition method, comprising:
Portable terminal is gathered video data;
Obtain the identification information of portable terminal, identification information is embedded in the video data with the watermark mode;
Video data is mail to receiving terminal.
Further, this method also comprises:
Portable terminal is encrypted the back to identification information through encryption key and is embedded in the video data with the invisible watermark mode;
After receiving terminal receives video data, extract watermark information, obtain identification information through deciphering.
Wherein, identification information comprises geographical position, the acquisition time of said video data and the identification number of said portable terminal at said portable terminal place.
The technical problem that the present invention will solve provides a kind of portable terminal, the authenticity of the video data that can guarantee to gather.
According to a further aspect in the invention, a kind of portable terminal is provided, comprises:
Video acquisition unit is used to gather video data;
Identify acquiring unit, be used to obtain the identification information of portable terminal, generate watermark information according to identification information;
Watermark embeds the unit, is used to receive the video data and the watermark information that comes the tagging acquiring unit from video acquisition unit, and watermark information is embedded into said video data, sends video data.
Further, this portable terminal also comprises ciphering unit; The mark encryption unit is used for to receiving identification information from the sign acquiring unit identification information being encrypted through encryption key, generates watermark information, sends to watermark and embeds the unit; Watermark embeds the unit and is used to receive from the video data of video acquisition unit with from the watermark information after the encryption of mark encryption unit, the watermark information after encrypting is embedded into video data after, send video data.
The present invention also provides a kind of receiving terminal, comprising:
The watermark extracting unit is used to receive the video data that comprises watermark information, and video data is decoded, and extracts watermark information;
The sign extraction unit is used for receiving watermark information from said watermark extracting unit, obtains identification information according to watermark information.
According to an embodiment of receiving terminal of the present invention, this receiving terminal also comprises the sign decoding unit; Wherein, the sign extraction unit is used for receiving watermark information from the watermark extracting unit, obtains the identification information of encrypting according to watermark information; The sign decryption unit is used for receiving the identification information of encrypting from the sign extraction unit, deciphers the back and obtains identification information, and the identification information that obtains is added on video with visual way.
The present invention also provides a kind of video acquisition system that comprises above-mentioned portable terminal and receiving terminal.
Mobile terminal video acquisition method provided by the invention, system and portable terminal embed the identification information of portable terminal with the watermark mode in the video data of gathering, identification information can not consciousness at transmitting terminal, has hiding property and fail safe; Can verify video data through the identification information in the video data, guarantee authenticity, the accuracy of video data.
Further, identification information comprises information such as position, time, terminal recognition number, and the multi-aspect information of video data acquiring is provided, and has guaranteed the accuracy of video data from many aspects.
Description of drawings
Fig. 1 illustrates the flow chart of an embodiment of mobile terminal video acquisition method of the present invention;
Fig. 2 illustrates the flow chart of another embodiment of mobile terminal video acquisition method of the present invention;
Fig. 3 illustrates the flow chart of another embodiment of mobile terminal video acquisition method of the present invention;
Fig. 4 illustrates the structure chart of an embodiment of video acquisition system of the present invention;
Fig. 5 illustrates the structure chart of another embodiment of video acquisition system of the present invention;
Fig. 6 illustrates the structure chart of another embodiment of video acquisition system of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is more comprehensively described, exemplary embodiment of the present invention wherein is described.
Fig. 1 illustrates the flow chart of an embodiment of mobile terminal video acquisition method of the present invention.
As shown in Figure 1, in step 102, portable terminal is gathered video data.Can gather the video/audio data simultaneously.
In step 104, obtain the identification information of portable terminal.For example, identification information can comprise geographical position, the acquisition time of video data and the identification informations such as identification number of portable terminal at portable terminal place.The identification number of portable terminal can customer identification number or device identification number, customer identification number be can unique identification mobile phone users number, for example IMSI or MIN etc.; Device identification number be can unique identification mobile phone terminal number, for example IMEI, ESN, UIMid or MEID etc.
In step 106, the identification information of portable terminal is embedded in the video data with the watermark mode.Watermark information can directly superpose on video data; Perhaps to behind the coding video data of gathering; Dct transform domain, the time/hide watermark on frequency transform domain and the wavelet transformed domain, with being embedded in the video data with the invisible watermark mode after the identification information conversion.
In step 106, there is the video data of watermark information to mail to receiving terminal embedding.Receiving terminal can be the portable terminal or the webserver etc.
In the above-described embodiments, in the video data of gathering, embed the identification information of portable terminal with the watermark mode, identification information can not consciousness at transmitting terminal, has hiding property and fail safe; Can verify video data through the identification information in the video data, guarantee authenticity, the accuracy of video data.Identification information comprises information such as position, time, terminal recognition number, and the multi-aspect information of video data acquiring is provided, and has guaranteed the accuracy of video data from many aspects.
According to one embodiment of present invention, in video, embed the invisible watermark that comprises identification information and possess robustness, after through the multiple signal processing that is not intended to or has a mind to, digital watermarking still can the retaining part integrality also can accurately be differentiated.Possible signal processing comprises interchannel noise, filtering, D/A and mould/number conversion, resampling, shearing, displacement, dimensional variation and lossy compression method coding etc.The robustness watermark can successfully manage in the coding transmission process influences such as packet loss, adapts to mobile network's error rate condition with higher, makes identification information in transmission course, be not easy to be destroyed.
Fig. 2 illustrates the flow chart of another embodiment of mobile terminal video acquisition method of the present invention.
As shown in Figure 2, in step 202, obtain encryption key.Can obtain encryption key through transmitting terminal and receiving terminal dynamic negotiation, for example, when video communication session each time begins, dynamically generate.To introduce portable terminal (transmitting terminal) and receiving terminal dynamic negotiation after a while and obtain concrete a realization of encryption key.
In step 204, start the video acquisition process, gather video data.The original video data form of gathering for example is forms such as RGB or YUV.
In step 206, gather identification information.Can the timing acquiring identification information, acquisition time can be 5s, 10s, 30s, 1m etc. according to requirements set at interval.Identification information comprises:
I) geographical position at portable terminal place.For example, if embedded in mobile phone GPS, and can receive signal outdoor, then can use GPS to obtain the geographical position at mobile phone place; In addition, can also use base station triangle locate mode to obtain mobile phone geographic location information;
Ii) the video data acquiring time, can use the mobile phone current system time;
Iii) customer identification number, for example IMSI of cdma network etc.
In step 208, use encryption key to encrypt to the identification information of gathering.
In step 210, generate watermark information according to the identification information of encrypting.
In step 212,, watermark information is embedded in the video data coding video data.For example, watermark embeds the I two field picture to video, the I frame is carried out dct transform, embed watermark in the DCT coefficient.
In step 214, the video data after portable terminal will be encoded sends to receiving terminal.
Behind the receiving terminal receiving video data, extract watermark information, and use decruption key that watermark information is deciphered, obtain the identification information of video data.Receiving terminal is added to identification information on the video with visual way, sends to player and carries out video playback.
In the foregoing description, introduced regular collection video information.It will be understood by those of skill in the art that among the present invention that the identification informations such as identification number of geographical position, video data acquiring time and the portable terminal at portable terminal place can obtain respectively in different time, with the different cycles.For example; The identification number of portable terminal may remain unchanged always; Can when start, obtain, the acquisition time of video data can regularly obtain with the short time interval (for example, 1 second); And the geographical position at portable terminal place can regularly obtain with the long time interval (for example, 1 minute).Identification information and video data acquiring are mutual continuous processs, do not stress the sequencing between them.
In the above-described embodiments, Crypted password is encrypted identification information through consultation, prevents that identification information from being extracted and distorting by the people, further guaranteed the fail safe of identification information, and guaranteed accuracy, the reliability of video data.
Introduce transmitting terminal and receiving terminal dynamic negotiation below and obtain concrete a realization of encryption key, comprise step:
1) originating end is initiated video communication/live request;
2) receiving terminal response request, and in response message, carry a key Skey who generates at random;
3) after originating end receives request response and Skey, generate ciphering key key at random;
4) after originating end is encrypted Ckey with Skey, send response message and give receiving terminal;
5) after receiving terminal receives the password of encryption, untie password, obtain Ckey with Skey
6) originating end and receiving terminal use Skey+Ckey as encryption key.
Confirm Crypted password through dynamic negotiation, increased the difficulty that the identification information of encrypting is deciphered, fail safe is provided.
Fig. 3 illustrates the flow chart of another embodiment of mobile terminal video acquisition method of the present invention.In this embodiment, portable terminal begins the real-time video communication, at first obtains encryption key, regularly obtains identification informations such as portable terminal position, video acquisition time and mobile terminal user/device identification number simultaneously; Audio, video data is gathered with real-time coding in, above-mentioned identification information is encrypted the back is embedded in the video data with the invisible watermark mode.After receiving terminal receives video data, extract watermark and also use secret key decryption, restore on the frame of video that is superimposed upon behind the identification information after the deciphering.Concrete steps are following:
In step 302, start the real-time video communication at originating end;
In step 304, originating end and receiving terminal carry out the password negotiations process, confirm encryption key;
In step 306, originating end is gathered video image;
In step 308, originating end is regularly gathered the identification informations such as user identification number information of mobile phone position, video acquisition time and mobile phone; And use key to encrypt the identification information;
In step 310, to the coding video data of gathering; Be embedded in the video data with the invisible watermark mode after the identification information conversion after will encrypting simultaneously;
In step 312, receiving terminal is decoded to encoded video after receiving data;
In step 314, extract watermark information, use secret key decryption, and identification information is superimposed upon on the video, be shown to the user with visual way.
In the above-described embodiments; The video data of real-time collection is embedded the identification information of encryption with the mode of invisible watermark; And decipher and reduce at receiving terminal; Be superimposed upon on the video with visual way, both guaranteed the identification information fail safe, be convenient to accuracy and reliability that the user recognizes video data again.
Fig. 4 illustrates the structure chart of an embodiment of video acquisition system of the present invention.As shown in Figure 4, this video acquisition system comprises transmitting terminal 41 and receiving terminal 42.Wherein, transmitting terminal 41 comprises that video acquisition unit 411, sign acquiring unit 412 and watermark embed unit 413.Receiving terminal 42 comprises watermark extracting unit 421 and sign extraction unit 422.Wherein, video acquisition unit 411 is used to gather video data; Sign acquiring unit 412 is used to obtain the identification information of portable terminal, generates watermark information according to identification information; Watermark embeds unit 413 and is used to receive the video data and the watermark information that comes tagging acquiring unit 412 from video acquisition unit 411, watermark information is embedded in the video data of coding, sends the video data after encoding.Watermark extracting unit 421 is used to receive the video data that comprises watermark information, and video data is decoded, and extracts watermark information; Sign extraction unit 422 is used for the 421 reception watermark informations from the watermark extracting unit, obtains identification information according to watermark information.The identification information that obtains is added on video with visual way, thereby when display video, can sees identification information.Identification information for example comprises geographical position, the acquisition time of video data and the identification number of portable terminal at portable terminal place.Transmitting terminal can obtain the geographical position at portable terminal place through GPS locating module or base station locate mode.
In the above-described embodiments; The sign acquiring unit of transmitting terminal obtains the identification information of portable terminal, embeds the unit through watermark the mode of identification information with invisible watermark is embedded in the video data of collection, and receiving terminal obtains the identification information in the video data through watermark extracting unit and sign extraction unit; Can be used for verifying the accuracy of video data; And identification information is hidden in the video data, and the sensory perceptual system that can not be sent out the end people is discovered or noticed to have fail safe.Identification information comprises information such as position, time, terminal recognition number, has guaranteed the accuracy of video data from many aspects.
Fig. 5 illustrates the structure chart of another embodiment of video acquisition system of the present invention.As shown in Figure 5, this video acquisition system comprises transmitting terminal 51 and receiving terminal 52.Wherein, transmitting terminal 51 comprises that video acquisition unit 411, sign acquiring unit 412, mark encryption unit 514 and watermark embed unit 513.Receiving terminal 52 comprises watermark extracting unit 421, sign extraction unit 522 and sign decryption unit 523.Wherein, the video acquisition unit 411 of transmitting terminal can be referring to the description of corresponding unit among Fig. 4, for being not described in detail in this for purpose of brevity with the watermark extracting unit 421 of sign acquiring unit 412, receiving terminal.Mark encryption unit 514 is used to receive the identification information of tagging acquiring unit 412, utilizes encryption key that identification information is encrypted, and generates watermark information and sends to watermark embedding unit 513 then.Watermark embeds unit 513 and is used to receive from the video data of video acquisition unit 411 with from the watermark information of mark encryption unit 514, watermark information is embedded in the video data of coding, sends the video data behind the coding.Sign extraction unit 522 is 421 reception watermark informations from the watermark extracting unit, obtain the identification information of encrypting according to watermark information; Sign decryption unit 523 is used for receiving the identification information of encrypting from sign extraction unit 522, the identification information of encrypting is deciphered the back obtain identification information.The identification information that obtains is added on video with visual way, thereby when display video, can sees identification information.The encryption key that mark encryption unit 514 uses can realize being arranged on portable terminal, perhaps through obtaining with the receiving terminal dynamic negotiation.
In the above-described embodiments; Transmitting terminal is encrypted identification information through the mark encryption unit; Receiving terminal is deciphered and is reduced identification information through the sign decryption unit; Be superimposed upon on the video with visual way, both guaranteed the identification information fail safe, be convenient to accuracy and reliability that the user recognizes video data again.
Fig. 6 illustrates the structure chart of another embodiment of video acquisition system of the present invention.Compare with Fig. 5, transmitting terminal 61 also comprises key agreement unit 615,625 respectively with receiving terminal 62.Key agreement unit 615,625 is used for carrying out key agreement with the opposite end, confirms encryption key and decruption key.
In the above-described embodiments, confirm Crypted password, increased the difficulty that the identification information of encrypting is deciphered, fail safe is provided through key agreement unit dynamic negotiation.
The present invention prevents the fraud of video through in video, increasing sign property information.Add these sign property information, information such as reflecting video collecting location, time on the one hand; Can not exert an influence simultaneously, can not discovered or notice by people's sensory perceptual system to video pictures; Under wireless network error rate condition with higher, should be able to guarantee information can recover.
Among several embodiment of Fig. 4-Fig. 6, each unit illustrates so that their function to be described with block diagram in the above.These functional blocks can realize with hardware, software, firmware, middleware, microcode, hardware description voice or their combination in any.For instance, one or two functional blocks can utilize the code that operates on microprocessor, digital signal processor (DSP) or any other the suitable platform to realize.Code can be represented the combination in any of process, function, subprogram, program, routine, subroutine, module or instruction, data structure or program statement.Code can be arranged in computer-readable medium.Computer-readable medium can comprise one or more memory device; For example, comprise RAM memory, flash memories, ROM memory, eprom memory, eeprom memory, register, hard disk, portable hard drive, CD-ROM or other any type of storage mediums well known in the art.Computer-readable medium can also comprise the carrier wave of encoded data signal.
Alternatively; Perhaps in addition, one or two functional modules can utilize application-specific integrated circuit (ASIC) (ASIC), controller, microcontroller, state machine, field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components or their combination in any to realize.
Those skilled in the art will recognize that hardware, firmware and software arrangements replaceability in these cases, and how to realize each said function in application-specific ground best.
Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.A lot of modifications and variation are obvious for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (12)
1. a mobile terminal video acquisition method is characterized in that, comprising:
Portable terminal is gathered video data;
Obtain the identification information of said portable terminal, said identification information is embedded in the said video data with the watermark mode;
Said video data is mail to receiving terminal.
2. mobile terminal video acquisition method according to claim 1 is characterized in that, also comprises:
Said portable terminal is encrypted the back to said identification information through encryption key and is embedded in the said video data with the invisible watermark mode;
After said receiving terminal receives said video data, extract said watermark information, obtain said identification information through deciphering.
3. mobile terminal video acquisition method according to claim 1 is characterized in that, said identification information comprises geographical position, the acquisition time of said video data and the identification number of said portable terminal at said portable terminal place.
4. mobile terminal video acquisition method according to claim 1 is characterized in that, also comprises:
The identification information that said receiving terminal will extract from watermark information is added to visual way the said video data.
5. mobile terminal video acquisition method according to claim 2 is characterized in that, also comprises:
Said portable terminal and said receiving terminal carry out key agreement and confirm said encryption key.
6. mobile terminal video acquisition method according to claim 2 is characterized in that, said receiving terminal is portable terminal or server; Or
Said watermark is a robust watermarking; Or
Obtain the geographical position of said portable terminal through the built-in GPS module of said portable terminal or through base station triangle location.
7. a portable terminal is characterized in that, comprising:
Video acquisition unit is used to gather video data;
Identify acquiring unit, be used to obtain the identification information of said portable terminal, generate watermark information according to said identification information;
Watermark embeds the unit, is used to receive from the video data of said video acquisition unit with from the watermark information of said sign acquiring unit, and said watermark information is embedded into said video data, sends video data.
8. portable terminal according to claim 7 is characterized in that, also comprises ciphering unit;
Said mark encryption unit is used for to receiving said identification information from said sign acquiring unit said identification information being encrypted through encryption key, generates watermark information, sends to said watermark and embeds the unit;
Said watermark embeds the unit, is used to receive from the video data of said video acquisition unit with from the watermark information after the encryption of said mark encryption unit, the watermark information after the said encryption is embedded into said video data after, send video data.
9. portable terminal according to claim 8 is characterized in that, also comprises the key agreement unit, is used for carrying out key agreement with receiving terminal, confirms said encryption key.
10. a receiving terminal is characterized in that, comprising:
The watermark extracting unit is used to receive the video data that comprises watermark information, and video data is decoded, and extracts watermark information;
The sign extraction unit is used for receiving watermark information from said watermark extracting unit, obtains identification information according to watermark information.
11. receiving terminal according to claim 10 is characterized in that, also comprises the sign decoding unit;
Said sign extraction unit is used for receiving watermark information from said watermark extracting unit, obtains the identification information of encrypting according to said watermark information;
Said sign decryption unit is used for receiving the identification information of encrypting from said sign extraction unit, deciphers the back and obtains identification information, and the identification information that obtains is added on video with visual way.
12. a video acquisition system is characterized in that, comprising:
Like any described portable terminal in the claim 7 to 9; Or
Like any described receiving terminal among the claim 10-11.
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