CN102377974B - A kind of mobile terminal, receiving terminal, video capture method and system - Google Patents
A kind of mobile terminal, receiving terminal, video capture method and system Download PDFInfo
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- CN102377974B CN102377974B CN201010247737.5A CN201010247737A CN102377974B CN 102377974 B CN102377974 B CN 102377974B CN 201010247737 A CN201010247737 A CN 201010247737A CN 102377974 B CN102377974 B CN 102377974B
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Abstract
The present invention discloses a kind of mobile terminal, receiving terminal, video capture method and system.The method comprises: mobile terminal gathers video data; Obtain the identification information of mobile terminal, identification information is embedded in video data in watermark mode; Video data is mail to receiving terminal.The present invention is by increasing identification information in video, to prevent the fraud of video data.These identification information is added in invisible watermark mode, on the one hand can the information such as reflecting video collecting location, time, also video pictures can not be produced simultaneously, can not be discovered by the sensory perceptual system of people or notice.When the wireless network error rate is higher, can guarantee information can recover.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to a kind of mobile terminal, receiving terminal, video capture method and system.
Background technology
The development of mobile communication technology makes the mobile terminal devices such as mobile phone more and more general.Meanwhile, the function of mobile terminal device and performance also from strength to strength, not only as the means of voice call, also can provide the multi-media communication comprising video, and such as visual telephone, mobile phone are live etc.On this basis, derive again numerous application, such as routine patrolled and examined, car damage identification etc.
Under some application, such as routine is patrolled and examined, and needs the accuracy confirming video data acquiring, to prevent the situation of forging video acquisition data.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of method that mobile terminal video gathers, and can ensure the authenticity of video data.
One aspect of the present invention provides a kind of mobile terminal video acquisition method, comprising:
Mobile terminal gathers video data;
Obtain the identification information of mobile terminal, identification information is embedded in video data in watermark mode;
Video data is mail to receiving terminal.
Further, the method also comprises:
Mobile terminal is embedded in video data in invisible watermark mode after being encrypted by encryption key identification information;
After receiving terminal receives video data, extract watermark information, obtain identification information by deciphering.
Wherein, identification information comprises the identification number of the geographical position at described mobile terminal place, the acquisition time of described video data and described mobile terminal.
The technical problem that the present invention will solve is to provide a kind of mobile terminal, can ensure the authenticity of the video data gathered.
According to a further aspect in the invention, a kind of mobile terminal is provided, comprises:
Video acquisition unit, for gathering video data;
Mark acquiring unit, for obtaining the identification information of mobile terminal, according to identification information generating watermark information;
Watermark embedder unit, for receive from video acquisition unit video data and carry out the watermark information of tagging acquiring unit, watermark information is embedded into described video data, sends video data.
Further, this mobile terminal also comprises ciphering unit; Mark encryption unit is used for receiving identification information to from mark acquiring unit, and be encrypted by encryption key identification information, generating watermark information, sends to watermark embedder unit; Watermark embedder unit, for receiving the watermark information after the video data from video acquisition unit and the encryption from mark encryption unit, after the watermark information after encryption is embedded into video data, sends video data.
The present invention also provides a kind of receiving terminal, comprising:
Watermark extracting unit, for the video data that receiving package is with watermarked information, decodes to video data, extracts watermark information;
Marker extraction unit, for receiving watermark information from described 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 mark decoding unit; Wherein, marker extraction unit is used for receiving watermark information from watermark extracting unit, obtains the identification information of encryption according to watermark information; Mark decryption unit is used for the identification information receiving encryption from marker extraction unit, is decrypted rear acquisition identification information, is added in a visible manner on video by the identification information of acquisition.
The present invention also provides a kind of video acquisition system comprising above-mentioned mobile terminal and receiving terminal.
Mobile terminal video acquisition method provided by the invention, system and mobile terminal, to embed the identification information of mobile terminal in the video data gathered in watermark mode, identification information can not consciousness at transmitting terminal, has hiding and fail safe; Can video data be verified by the identification information in video data, ensure that the authenticity of video data, accuracy.
Further, identification information comprises the information such as position, time, terminal identification number, provides the multi-aspect information of video data acquiring, ensure that the accuracy of video data from many aspects.
Accompanying drawing explanation
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 described more fully, exemplary embodiment of the present invention is wherein 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, mobile terminal gathers video data.Video/audio data can be gathered simultaneously.
In step 104, obtain the identification information of mobile terminal.Such as, identification information can comprise the identification information such as identification number of the geographical position at mobile terminal place, the acquisition time of video data and mobile terminal.The identification number of mobile terminal can customer identification number or device identification number, and customer identification number is the number that uniquely can identify mobile phone users, such as IMSI or MIN etc.; Device identification number is the number that uniquely can identify mobile phone terminal, such as IMEI, ESN, UIMid or MEID etc.
In step 106, the identification information of mobile terminal is embedded in video data in watermark mode.Directly can superpose watermark information on video data, or after the coding video data gathered, dct transform domain, time/frequency transform domain and wavelet transformed domain on hide watermark, be embedded in video data in invisible watermark mode after identification information is converted.
In step 106, the video data being embedded with watermark information is mail to receiving terminal.Receiving terminal can be mobile terminal or the webserver etc.
In the above-described embodiments, to embed the identification information of mobile terminal in the video data gathered in watermark mode, identification information can not consciousness at transmitting terminal, has hiding and fail safe; Can video data be verified by the identification information in video data, ensure that the authenticity of video data, accuracy.Identification information comprises the information such as position, time, terminal identification number, provides the multi-aspect information of video data acquiring, ensure that the accuracy of video data from many aspects.
According to one embodiment of present invention, embed the invisible watermark comprising identification information in video and possess robustness, after the multiple signal processing be not intended to or have a mind to, digital watermarking still can retaining part integrality also can accurately be differentiated.Possible signal processing comprises interchannel noise, filtering, D/A and analog/digital conversion, resampling, shearing, displacement, dimensional variation and lossy compression method coding etc.Multipurpose watermarking can to successfully manage in coding transmission process the impacts such as packet loss, adapts to the situation that mobile network's error rate is higher, makes identification information be not easy to be destroyed in transmitting procedure.
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.Encryption key can be obtained by transmitting terminal and receiving terminal dynamic negotiation, such as, dynamically generate when video communication session start each time.A specific implementation of mobile terminal (transmitting terminal) and receiving terminal dynamic negotiation acquisition encryption key will be introduced after a while.
In step 204, start video acquisition process, gather video data.The original video data form gathered is such as the forms such as RGB or YUV.
In step 206, gather identification information.Can timing acquiring identification information, acquisition time interval can be set as 5s, 10s, 30s, 1m etc. according to demand.Identification information comprises:
I) geographical position at mobile terminal place.Such as, if embedded in mobile phone GPS, and can Received signal strength in outdoor, then GPS can be used to obtain the geographical position at mobile phone place; In addition, base station triangle polyester fibre mode can also be used to obtain mobile phone geographic location information;
Ii) the video data acquiring time, the system time that mobile phone is current can be used;
Iii) customer identification number, the IMSI etc. of such as cdma network.
In step 208, encryption key is used to be encrypted to the identification information gathered.
In step 210, according to the identification information generating watermark information of encryption.
In step 212, to coding video data, watermark information is embedded in video data.Such as, watermark embedment, for the I two field picture of video, carries out dct transform to I frame, watermarked in DCT coefficient.
In step 214, the video data after coding is sent to receiving terminal by mobile terminal.
After receiving terminal receiving video data, extract watermark information, and use decruption key to decipher watermark information, obtain the identification information of video data.Identification information is added on video by receiving terminal in a visible manner, is sent to player and carries out video playback.
In above-described embodiment, describe taken at regular intervals video information.It will be understood by those of skill in the art that in the present invention, the identification information such as identification number of the geographical position at mobile terminal place, video data acquiring time and mobile terminal can in the different time, obtain with the different cycles respectively.Such as, the identification number of mobile terminal may remain unchanged always, can obtain when starting shooting, the acquisition time of video data can with the shorter time interval (such as, 1 second) regularly obtain, and the geographical position at mobile terminal place regularly can obtain with the longer time interval (such as, 1 minute).Identification information and video data acquiring are mutual continuous processs, do not emphasize the sequencing between them.
In the above-described embodiments, Crypted password through consultation, is encrypted identification information, prevents identification information from being extracted by people and distorting, further ensures the fail safe of identification information, and ensure that accuracy, the reliability of video data.
Introduce a specific implementation of transmitting terminal and receiving terminal dynamic negotiation acquisition encryption key below, comprise step:
1) originating end initiates video communication/live request;
2) receiving terminal response request, and the key Skey carrying a stochastic generation in the response message;
3) after originating end receives request response and Skey, stochastic generation ciphering key key;
4) originating end Skey is to after Ckey encryption, sends response message to receiving terminal;
5) after receiving terminal receives the password of encryption, untie password with Skey, obtain Ckey
6) originating end and receiving terminal use Skey+Ckey as encryption key.
By dynamic negotiation determination Crypted password, add the difficulty that the identification information of encryption is decrypted, provide fail safe.
Fig. 3 illustrates the flow chart of another embodiment of mobile terminal video acquisition method of the present invention.In this embodiment, mobile terminal starts real-time video communication, first obtains encryption key, obtains the identification information such as user/device identification number of mobile terminal position, video acquisition time and mobile terminal simultaneously regularly; Audio, video data is being gathered and while real-time coding, is being embedded into after above-mentioned identification information encryption in video data in invisible watermark mode.After receiving terminal receives video data, extract watermark and use secret key decryption, superposing after restoring identification information in frame of video after decryption.Concrete steps are as follows:
In step 302, start real-time video communication at originating end;
In step 304, originating end and receiving terminal carry out ciphersuite negotiation process, determine encryption key;
In step 306, originating end gathers video image;
In step 308, the identification information such as user identification number information of originating end taken at regular intervals mobile phone position, video acquisition time and mobile phone; And use key to be encrypted identification information;
In step 310, to the coding video data gathered; To be embedded in video data in invisible watermark mode after the identification information conversion after encryption 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 video, be shown to user in a visible manner.
In the above-described embodiments, the video data of Real-time Collection is embedded to the identification information of encryption in the mode of invisible watermark, and be decrypted at receiving terminal and reduce, be superimposed upon in a visible manner on video, both ensure that identification information fail safe, be convenient to again accuracy and reliability that user recognizes video data.
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 video acquisition unit 411, mark acquiring unit 412 and watermark embedder unit 413.Receiving terminal 42 comprises watermark extracting unit 421 and marker extraction unit 422.Wherein, video acquisition unit 411 is for gathering video data; Identify acquiring unit 412 for obtaining the identification information of mobile terminal, according to identification information generating watermark information; Watermark embedder unit 413 for receive from video acquisition unit 411 video data and carry out the watermark information of tagging acquiring unit 412, watermark information is embedded in the video data of coding, sends the video data after coding.Watermark extracting unit 421, for receiving package video data with watermarked information, is decoded to video data, extracts watermark information; Marker extraction unit 422, for receiving watermark information from watermark extracting unit 421, obtains identification information according to watermark information.The identification information of acquisition is added on video in a visible manner, thus can identification information be seen when display video.Identification information such as comprises the identification number of the geographical position at mobile terminal place, the acquisition time of video data and mobile terminal.Transmitting terminal can obtain the geographical position at mobile terminal place by GPS locating module or architecture mode.
In the above-described embodiments, the mark acquiring unit of transmitting terminal obtains the identification information of mobile terminal, by watermark embedder unit, identification information is embedded in the video data of collection in the mode of invisible watermark, receiving terminal obtains the identification information in video data by watermark extracting unit and marker extraction unit, can be used for verifying the accuracy of video data, and identification information is hidden in video data, the sensory perceptual system that can not be sent out end people is discovered or notices, has fail safe.Identification information comprises the information such as position, time, terminal identification number, ensure that 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 video acquisition unit 411, mark acquiring unit 412, mark encryption unit 514 and watermark embedder unit 513.Receiving terminal 52 comprises watermark extracting unit 421, marker extraction unit 522 and mark decryption unit 523.Wherein, the watermark extracting unit 421 of the video acquisition unit of transmitting terminal 411 and mark acquiring unit 412, receiving terminal can see the description of corresponding unit in Fig. 4, for being not described in detail in this for purpose of brevity.Mark encryption unit 514, for receiving the identification information of tagging acquiring unit 412, utilizes encryption key to be encrypted identification information, and then generating watermark information send to watermark embedder unit 513.Watermark information, for receiving from the video data of video acquisition unit 411 and the watermark information from mark encryption unit 514, is embedded in the video data of coding by watermark embedder unit 513, sends the video data after coding.Marker extraction unit 522 receives watermark information from watermark extracting unit 421, obtains the identification information of encryption according to watermark information; Mark decryption unit 523, for receiving the identification information of encryption from marker extraction unit 522, is decrypted rear acquisition identification information to the identification information of encryption.The identification information of acquisition is added on video in a visible manner, thus can identification information be seen when display video.The encryption key that mark encryption unit 514 uses can realize being arranged on mobile terminal, or by obtaining with receiving terminal dynamic negotiation.
In the above-described embodiments, transmitting terminal is encrypted identification information by mark encryption unit, receiving terminal to be decrypted identification information by mark decryption unit and to be reduced, be superimposed upon in a visible manner on video, both ensure that identification information fail safe, be convenient to again accuracy and reliability that user recognizes video data.
Fig. 6 illustrates the structure chart of another embodiment of video acquisition system of the present invention.Compare with Fig. 5, transmitting terminal 61 and receiving terminal 62 also comprise key agreement unit 615,625 respectively.Key agreement unit 615,625, for carrying out key agreement with opposite end, determines encryption key and decruption key.
In the above-described embodiments, by key agreement unit dynamic negotiation determination Crypted password, add the difficulty that the identification information of encryption is decrypted, provide fail safe.
The present invention, by increasing identification information in video, prevents the fraud of video.Add these identification information, the information such as one side reflecting video collecting location, time; Can not have an impact to video pictures simultaneously, can not be discovered by the sensory perceptual system of people or notice; When the wireless network error rate is higher, should be able to guarantee information can recover.
In several embodiments of Fig. 4-Fig. 6 above, unit block diagram illustrates the function that they are described.These functional blocks can realize by hardware, software, firmware, middleware, microcode, hardware description voice or their combination in any.For example, one or two functional blocks can utilize the codes implement operated on microprocessor, digital signal processor (DSP) or any other suitable platform.Code can represent 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, such as, 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 are comprised.Computer-readable medium can also comprise the carrier wave of encoded data signal.
Alternatively, or 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 merit rating replaceability in these cases, and how to realize the described function in each application-specific ground best.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (7)
1. a mobile terminal video acquisition method, is characterized in that, comprising:
Mobile terminal and receiving terminal carry out key agreement determination encryption key, comprising:
Described mobile terminal initiates video communication/live request;
Described receiving terminal response request, and the key Skey carrying a stochastic generation in the response message;
After described mobile terminal receives request response and Skey, stochastic generation ciphering key key;
Described Skey used for mobile terminal, to after Ckey encryption, sends response message to described receiving terminal;
Described receiving terminal unties password with Skey after receiving the password of encryption, obtains Ckey;
Described mobile terminal and described receiving terminal use Skey+Ckey as encryption key;
Mobile terminal gathers video data;
Obtain the identification information of described mobile terminal, be embedded in described video data in invisible watermark mode after described mobile terminal is encrypted by encryption key described identification information;
Described video data is mail to described receiving terminal;
After described receiving terminal receives described video data, extract described watermark information, obtain described identification information by deciphering;
The identification information extracted from watermark information is added in described video data by described receiving terminal in a visible manner.
2. mobile terminal video acquisition method according to claim 1, is characterized in that, described identification information comprises the identification number of the geographical position at described mobile terminal place, the acquisition time of described video data and described mobile terminal.
3. mobile terminal video acquisition method according to claim 1 and 2, it is characterized in that, after the coding video data gathered, dct transform domain, time/frequency transform domain or wavelet transformed domain on hide watermark, be embedded in video data in invisible watermark mode after identification information is converted.
4. mobile terminal video acquisition method according to claim 1 and 2, it is characterized in that, embed the invisible watermark comprising identification information in video and possess robustness, after multi-signal processing procedure, digital watermarking energy retaining part integrality also can accurately be differentiated;
Wherein, described signal processing comprises interchannel noise, filtering, D/A and analog/digital conversion, resampling, shearing, displacement, dimensional variation and lossy compression method and encodes.
5. mobile terminal video acquisition method according to claim 2, is characterized in that, described receiving terminal is mobile terminal or server; Or
Described watermark is robust watermarking; Or
By the built-in GPS module of described mobile terminal or the geographical position being obtained described mobile terminal by base station triangle polyester fibre.
6. a mobile terminal, is characterized in that, comprising:
Video acquisition unit, for gathering video data;
Key agreement unit, for carrying out key agreement with receiving terminal, determines encryption key, and wherein said mobile terminal initiates video communication/live request; Described receiving terminal response request, and the key Skey carrying a stochastic generation in the response message; After described mobile terminal receives request response and Skey, stochastic generation ciphering key key; Described Skey used for mobile terminal, to after Ckey encryption, sends response message to described receiving terminal; Described receiving terminal unties password with Skey after receiving the password of encryption, obtains Ckey; Described mobile terminal and described receiving terminal use Skey+Ckey as encryption key;
Mark acquiring unit, for obtaining the identification information of described mobile terminal;
Mark encryption unit, for receiving described identification information to from described mark acquiring unit, be encrypted by described encryption key described identification information, generating watermark information, sends to watermark embedder unit;
Watermark embedder unit, for receiving the watermark information after the video data from described video acquisition unit and the encryption from described mark encryption unit, after the watermark information after described encryption is embedded into described video data, sends video data.
7. a video acquisition system, is characterized in that, comprises mobile terminal as claimed in claim 6; And receiving terminal;
Wherein, described receiving terminal comprises:
Watermark extracting unit, for the video data that receiving package is with watermarked information, decodes to video data, extracts watermark information;
Marker extraction unit, for receiving watermark information from described watermark extracting unit, obtains the identification information of encryption according to described watermark information;
Mark decryption unit, for receiving the identification information of encryption from described marker extraction unit, is decrypted rear acquisition identification information, is added in a visible manner on video by the identification information of acquisition.
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