CN101742225A - System and method for sending and receiving multimedia data - Google Patents
System and method for sending and receiving multimedia data Download PDFInfo
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- CN101742225A CN101742225A CN200810181613A CN200810181613A CN101742225A CN 101742225 A CN101742225 A CN 101742225A CN 200810181613 A CN200810181613 A CN 200810181613A CN 200810181613 A CN200810181613 A CN 200810181613A CN 101742225 A CN101742225 A CN 101742225A
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Abstract
The invention relates to a system and a method for sending and receiving multimedia data. The system for sending the multimedia data comprises a data separation controller, a data separator, a scrambling module and a multiplexing modulator, wherein the data separation controller is used for receiving data separation control information and controlling the separation of the multimedia data according to the data separation control information; the data separator is used for separating the multimedia data into the multimedia data which needs to be scrambled and the multimedia data which does not need to be scrambled; the scrambling module is connected with the data separator and used for receiving and scrambling the multimedia data which needs to be scrambled; and the multiplexing modulator is connected with the scrambling module and the data separator and used for carrying out multiplexing modulation treatment on the multimedia data which needs to be scrambled and the multimedia data which does not need to be scrambled and further being easy to send.
Description
Technical field
The present invention relates to a kind of the transmission and the system and method for receiving multimedia data, in particular at the scrambling of mobile multi-media broadcasting service and the system and method for descrambling.
Background technology
Mobile Multimedia Broadcasting is popular at present broadcast technology, uses this technology, can watch digitized TV programme on terminals such as mobile phone, MP4 in real time, has made things convenient for the user to teleview in moving.China General Bureau of Radio, Film and TV has been subjected to users' welcome after having released free China Mobile's DMB (CMMB) program.
In traditional cable television system, condition receiving system (CAS) has become a basic configuration.By the service condition receiving system, broadcasting service operator can control user's reception authority easily.The signal that transmits in cable all is the signal that has passed through scrambling, has carried corresponding Entitlement Control Message (ECM), Entitlement Management Message (EMM) and some scrambling parameters simultaneously in signal.These ECM, EMM and scrambling parameter are separated at receiving terminal, the CAS module of receiving terminal (generally being a sheet smart card) is analyzed it, extract control word (CW), the CW control word that extracts is sent to descrambler, descrambler utilizes the CW control word that the data flow of scrambling is carried out descrambling.The user who has obtained to authorize just can watch corresponding program.
General Bureau of Radio, Film and Television is putting forth effort on the condition receiving system of Application and Development in Mobile Multimedia Broadcasting, abbreviates the MMB-CAS system as, and MMB-CAS can be mobile multi-media broadcasting service protection is provided, and promptly protects at the broadcast communication of business.Mobile multi-media broadcasting service operator adds the MMB-CAS condition at mobile multi-media service usually and receives controlling mechanism when broadcasting.Adopt MMB-CAS, mobile multi-media broadcasting service operator can organize mandate to designated user or user at business or business packet, makes that having only authorized user or user to organize could use related service.
Fig. 1 shows the structure chart of the server-side system of general MMB-CAS.At server end, a scrambling module receives all audio, video datas that need transmission, then scrambling parameter, control word are sent to condition receiving front-end module (CAM-S), CAM-S sends ECM back to scrambling module after receiving these parameters, scrambling module utilizes ECM that all audio, video datas are carried out scrambling and audio, video data after the scrambling and ECM are sent to the multiplexes/modulates device, and CAM-S also is sent to the multiplexes/modulates device with EMM and is sent to later broadcast channel through multiplexing and modulation simultaneously.At the receiving terminal of condition receiving system, the MMB-CAS card is an important part, and mobile multi-media service operator provides the MMB-CAS smart card for the user, does not insert the terminal of MMB-CAS smart card and can only watch limited several programs.Have only the MMB-CAS smart card inserted and just can obtain higher authority after the MMB terminal and watch and listen to more program and use more service.
The MMB-CAS card has two kinds of schemes at present, comprises kilocalorie scheme and lesser calorie scheme.
Fig. 2 shows the terminal of lesser calorie scheme and the structure chart of condition receiving system.In the lesser calorie scheme, integrated condition receiving terminal module (CAM-C) only in the smart card, its system construction drawing is as shown in Figure 2.
The scrambled data that the MMB end-on is received is resolved, among the CAM-C that ECM, EMM that obtains and scrambling parameter are all sent into lesser calorie, CAM-C is according to the controlled word of these parameters, control word is sent back to the descrambler in the terminal, and descrambler utilizes control word that the data of scrambling are carried out descrambling and utilized player to play.In the lesser calorie scheme, what transmit between smart card and the terminal only is the data flow of low data bulks such as descrambling parameter and control word, and lower to the requirement of the interface between them, the structure of lesser calorie is also fairly simple.But, the shortcoming of lesser calorie scheme is, because there is corresponding with it descrambling module in different CAM-C modules and the descrambler in different condition receiving systems design manufacturer, and the operator of Mobile Broadcast Services also generally can select a plurality of condition receiving systems to design manufacturer, the result causes the product of condition receiving system design manufacturer completely different with the product that another condition receiving system designs manufacturer, used the user of the lesser calorie of a condition receiving system design manufacturer can not use another condition receiving system to design the terminal of manufacturer, the user can not change terminal equipment freely, also just can not realize real " separation between machine and card ".
In order to overcome the problems referred to above, the someone has proposed the scheme of kilocalorie.The kilocalorie scheme is exactly on the basis of lesser calorie scheme correlation modules such as descrambler and subframe resolver to be placed on the smart card.The kilocalorie scheme is complicated more a lot of than lesser calorie scheme.
Fig. 3 shows the terminal of kilocalorie scheme and the structure chart of condition receiving system.In the kilocalorie scheme, the data of the scrambling after terminal is need be with all demodulation multiplexing and ECM, EMM and scrambling parameter send smart card to, wherein ECM, EMM and scrambling parameter send to CAM-C, data after the scrambling send to descrambler, the scrambled data that the control word antithetical phrase frame parser that descrambler utilizes CAM-C to send is sent here is carried out descrambling, audio and video stream behind the descrambling is sent back to terminal, is play by the player in the terminal.The advantage of kilocalorie scheme be the Conditional Access Module of different production firm and descrambler all in smart card, only kilocalorie need be inserted new terminal and get final product so the user changes terminal, can change terminal easily, realize real " separation between machine and card ".Mobile multi-media broadcasting service operator also needn't consider the problem of terminal again, only needs the distribution kilocalorie to get final product, so the kilocalorie scheme is a solution that mobile multi-media broadcasting service operator is recommended very much.But, the shortcoming of this solution also is tangible, at first be to need jig that very high operational capability is arranged, processor in the middle of the card must be to being carried out descrambling by the data of scrambling, card also will move the CAM-C application and obtain control word simultaneously, and the card in the present mobile multi-media terminal with mobile communication function also needs the function of mobile communication SIM card, and these functions combine, and is exactly a very high test to the operational capability of blocking.In addition because a large amount of data that comprise audio/video bitstreams are carried out input and output by the interface between terminal and the card, the transmittability of docking port also has very high requirement, the transmission rate of the ISO7816 interface of traditional SIM card encapsulation mode the inside can not satisfy the requirement of this transmission rate, so must use interface more at a high speed, as USB, MMC etc., this has also proposed requirement to high-speed interface circuit.At last, because computing and interface data transmission at a high speed, the central processing unit and the various processing of circuit device that are integrated in very little SIM card encapsulation the inside all can produce bigger heat radiation, the other problems such as heat radiation that high-speed computation and transmission bring so the kilocalorie scheme also needs to solve.In the China mobile multi-media broadcasting technology also there be not substantially very ripe kilocalorie aspect at present.And the kilocalorie scheme of SIM card encapsulation is difficult to realize more.
Therefore need a kind ofly can either make the user can freely change terminal equipment and realize separation between machine and card, can reduce system and method again to the requirement of card and interface.
Summary of the invention
The invention provides a kind of system that is used to send multi-medium data, this multi-medium data comprises voice data and video data, and this system comprises:
The data distribution controller is used to receive the data distribution control information, and the shunting of this multi-medium data is controlled in control information according to data distribution; The data distribution device, connect this data distribution controller, be used to receive this multi-medium data, and under the control of this data distribution controller, this multi-medium data is separated into multi-medium data that needs scrambling and the multi-medium data that does not need scrambling, and exports this multi-medium data that needs scrambling and this and do not need the multi-medium data of scrambling; Scrambling module connects this data distribution device, is used to receive that this needs the multi-medium data of scrambling with scrambling; And multiplexing modulator, connect this scrambling module and this data distribution device, what be used for receiving respectively this scrambling module output is not needed the multi-medium data of scrambling by this of the multi-medium data of scrambling and the output of this data distribution device, and do not needed the multi-medium data of scrambling to carry out multiplexing modulation treatment by the multi-medium data of scrambling and this to this, so that send.
According to embodiments of the invention, this data distribution control information specifies in this multi-medium data this to need the multi-medium data of scrambling and this not to need the multi-medium data of scrambling, and comprise and be used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not, and this data distribution device sends this data distribution control information to this multiplexing modulator.This data distribution control information can also be included in needs the information that shows after the descrambling failure.
According to embodiments of the invention, this system also comprises the condition receiving front-end module, connect this scrambling module and this multiplexing modulator, be used to receive scrambling parameter and the control word of handling by the scrambling about this multi-medium data of this scrambling module acquisition, and the output Entitlement Control Message is given this scrambling module and this multiplexing modulator.
According to embodiments of the invention, this system is the server end in the condition receiving system of Mobile Multimedia Broadcasting.
The present invention also provides a kind of system that is used for receiving multimedia data, and this multi-medium data comprises voice data and video data, and this system comprises:
Demodulation/demodulation multiplexer, be used to receive multi-medium data through multiplexing modulation treatment, and this multi-medium data carried out the demodulation multiplexing process, multi-medium data and data distribution control information after acquisition and output demodulation are multiplexing, wherein, this data distribution control information comprises and is used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not; The descrambling data shunt, connect this demodulation/demodulation multiplexer, be used to receive multi-medium data and this data distribution control information after multiplexing of this demodulation, the multi-medium data after multiplexing separates to this demodulation to utilize this data distribution control information, to obtain and to export the multi-medium data of not scrambling and the multi-medium data of scrambling; Descrambler connects this descrambling data shunt, and this that is used to receive this demodulating data shunt output be the multi-medium data of scrambling, to this multi-medium data of scrambling carry out descrambling, obtain and the output descrambling after multi-medium data; And the data stream buffer district, connect this descrambler and this descrambling data shunt, be used for receiving respectively not multi-medium data of scrambling of multi-medium data behind this descrambling and this, and carry out synchronously and merge handling, to export complete multi-medium data.If the user does not have authorized, then this data stream buffer district information that should needing after descrambling failure of comprising in this data distribution control information shown and this not the multi-medium data of scrambling merge processing, to export corresponding authorization failure information.
According to embodiments of the invention, this descrambling data shunt is exported this data distribution control information and is given this data stream buffer district.
According to embodiments of the invention, this data stream buffer district utilizes this data distribution control information, with the multi-medium data behind this descrambling and this not the multi-medium data of scrambling carry out synchronously and merge, to obtain complete multi-medium data.
According to embodiments of the invention, this data distribution control information can also be included in needs the information that shows after the descrambling failure; This data stream buffer district does not have under the authorized situation the user, the information that should needing after descrambling failure of comprising in this data distribution control information shown and this not multi-medium data of scrambling merge processing, to export corresponding authorization failure information.
According to embodiments of the invention, this system also comprises the conditional access terminal module, this conditional access terminal module connects this demodulation/demodulation multiplexer and this descrambler, be used to receive Entitlement Control Message, Entitlement Management Message from this demodulation/demodulation multiplexer and the scrambling parameter of handling about the scrambling of this multi-medium data, therefrom parse control word and be sent to this descrambler; And this descrambler utilizes this control word that the scrambled data from this descrambling data shunt is carried out descrambling.Do not have under the authorized situation the user, this conditional access terminal module sends authorization failure information to this descrambler, this descrambler notification data streambuf descrambling failure.
According to embodiments of the invention, this system is the receiving terminal in the condition receiving system of Mobile Multimedia Broadcasting.
According to embodiments of the invention, this conditional access terminal module and this descrambler are integrated in together, for example are integrated in the card.
The present invention provides a kind of method that sends multi-medium data again, and this multi-medium data comprises voice data and video data, and this method comprises:
Receive the data distribution control information, this data distribution control information is used to specify the multi-medium data that needs scrambling in this multi-medium data and does not need the multi-medium data of scrambling, and needs the information that shows after descrambling is failed; According to this data distribution control information, this multi-medium data is separated into multi-medium data that needs scrambling and the multi-medium data that does not need scrambling; This needs the multi-medium data of scrambling scrambling; And to not needed the multi-medium data of scrambling to carry out multiplexing modulation treatment, so that send by the multi-medium data of scrambling and this.
This multi-medium data that needs scrambling can be a voice data.
This multi-medium data that needs scrambling can be a part of video data.
This multi-medium data that needs scrambling can be the partial video piece in voice data and the video data.
This multi-medium data that needs scrambling can be a part of video data frame and a part of audio data frame in this multi-medium data.
The present invention provides a kind of method that is used for receiving multimedia data again, and this multi-medium data comprises voice data and video data, and this method comprises:
Receive multi-medium data through multiplexing modulation treatment; This multi-medium data is carried out the demodulation multiplexing process, to obtain multi-medium data and the data distribution control information of demodulation after multiplexing, wherein, this data distribution control information comprises and is used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not, and can also be included in needs the information that shows after the descrambling failure; The multi-medium data after multiplexing separates to this demodulation to utilize this data distribution control information, with the multi-medium data that obtains not scrambling and the multi-medium data of scrambling; To this multi-medium data of scrambling carry out descrambling, to obtain the multi-medium data behind the descrambling; And merge not multi-medium data of scrambling of multi-medium data behind this descrambling and this, to export complete multi-medium data.
The present invention provides a kind of method that is used for receiving multimedia data again, and this multi-medium data comprises voice data and video data, and this method comprises:
Receive multi-medium data through multiplexing modulation treatment; This multi-medium data is carried out the demodulation multiplexing process, to obtain multi-medium data and the data distribution control information of demodulation after multiplexing, wherein, this data distribution control information comprises and is used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not, and needs the information that shows after the descrambling failure; The multi-medium data after multiplexing separates to this demodulation to utilize this data distribution control information, with the multi-medium data that obtains not scrambling and the multi-medium data of scrambling; Under the situation that the user does not obtain the authorization, send the descrambling failure information to the data stream buffer district, the data stream buffer district need after with this descrambling failure that comprises in this data distribution control information the information that shows and this not scrambled data merge, with output authorization failure information.The information that needs to show after this descrambling failure can be advertising message or out of Memory.
Below in conjunction with drawings and Examples the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of server end of the condition receiving system of Mobile Multimedia Broadcasting general in the prior art;
Fig. 2 is a kind of receiving terminal that is used for Mobile Multimedia Broadcasting of prior art and the structural representation of condition receiving system;
Fig. 3 is the another kind of receiving terminal that is used for Mobile Multimedia Broadcasting of prior art and the structural representation of condition receiving system;
Fig. 4 is the structural representation according to the server end of the condition receiving system of the embodiment of the invention;
Fig. 5 is the structural representation according to the receiving terminal of the condition receiving system of the embodiment of the invention;
Fig. 6 is the schematic diagram according to the video scrambling piece in the method for scrambling of the embodiment of the invention; And
Fig. 7 is according to the scrambling of the embodiment of the invention and the workflow diagram of de-scrambling method.
Embodiment
According to embodiments of the invention, be that a kind of condition receiving system that is used for multimedia broadcasting for the shortcoming that overcomes prior art proposes also can be referred to as it " middle card " scheme on the basis of the technology of the kilocalorie of present prior art and lesser calorie scheme.
According to this embodiment, need transform existing whole condition receiving system, server end in the condition reception, be not that all audio/video data is all by scrambling, only Yi Bufen audio, video data is by scrambling, and which part is by scrambling, which part is not by scrambling, then handled by a data shunt controller control data shunt, the information of data distribution (parameter of part scrambling just) sends with audio and video data streams simultaneously by other broadcast channel is multiplexing.
At receiving terminal, after the demodulation demodulation multiplexer in the receiving terminal, be provided with a scrambling descrambling data shunt, the data distribution control information parameter of the part scrambling that the utilization of scrambling descrambling data shunt is received is shunted the data flow that receives, for the data flow part that does not have scrambling, shunt directly is sent to the audio, video data buffering area.For the partial data that has passed through scrambling, the scrambling shunt is sent to the subframe resolver by the interface between terminal and the condition receiving card with it.Utilize the scheme identical with above-mentioned kilocalorie, condition receiving card carries out descrambling and outputs to audio, video data streambuf in the terminal by the interface between terminal and the condition receiving card the data flow of this a part of scrambling, the effect of audio, video data streambuf is not have the data of scrambling synchronously and by the scrambled data behind the descrambling, then both are combined the complete transparent data stream of formation and be sent to player, just can play.
Fig. 4 illustrates the structural representation according to the server end of the condition receiving system of the embodiment of the invention.Wherein, in the server end module of condition receiving front-end, the data distribution control information control data shunt that the utilization of a data shunt controller receives is shunted the Voice ﹠ Video data of whole inputs.
In the present embodiment, the mode of data distribution can have a variety of, below several are examples:
1, only voice data is shunted, voice data is sent to scrambling module carries out scrambling, and video data directly is sent to multiplexing modulator without scrambling.So just make that the user who does not obtain the authorization can only see image, and can't hear sound or hear unusual sound, thereby limit watching of limited users;
2, the subregion of image is shunted, a part of data of video are sent to scrambling module and carry out scrambling.The position of the partial video of scrambling in whole video can be fixed, and also can be regularly change.The size of the partial video of scrambling also can be fix or regularly change.The shape of the video blocks of scrambling also can be rectangle or square, can be the shape that is set to other, as circle or triangle etc.The quantity of the video blocks of scrambling also can be fix or random fluctuation.Except the partial video piece of scrambling, other parts of video are not sent to multiplexing modulator with being had scrambling, and transmit by broadcast channel.
3, the combination of above dual mode can be carried out scrambling with the video blocks of voice signal and part, and other video blocks directly is sent to multiplexing modulator without scrambling.
4, carry out scrambling every frame, according to the demand of scrambling shunting, the part in video and the audio data frame is carried out scrambling, unauthorized user can be seen the image that frame-skipping is very serious like this, perhaps desultory sound.Thereby influence watching of unauthorized user.
Shunt directly is sent to not only to comprise in the signal of multiplexing modulator does not have the part of scrambling audio, video data, and comprise the data distribution control information, the data distribution control information has comprised and has been used for distinguishing the scrambling part and the full detail of scrambling part not, comprises different contents according to the mode difference of shunting.
The data distribution control information comprise in have:
1, being divided the data of sts-stream scrambling sts is audio frequency or video, or the both carries out the branch sts-stream scrambling sts;
If it is audio-frequency unit that 2 quilts divide the data of sts-stream scrambling sts, then should comprise the frame number of the Frame of scrambling;
If 3 to be divided the data of sts-stream scrambling sts are video sections, then except the frame number of the Frame that should comprise the branch sts-stream scrambling sts, also should comprise:
A) need by the size of the video original image of branch sts-stream scrambling sts;
B) wherein had several by the image block of scrambling;
C) at each by the scrambling image block, provide respectively:
I. by the upper left corner coordinate of the image block of scrambling (perhaps other have the position coordinates of reference value, as center point coordinate etc.)
Ii. by the size of the image block of scrambling (should guarantee to use the scope that can not exceeded the video original image by the scrambling image block of the position that provided and size parameter location)
Iii. in the image of not scrambling, the content that the picture position of scrambling should be filled (blank, color lump, advertisement, purchase contact details etc.)
D) if be not rectangle, then also to provide the concrete parameter of this shape by the scrambling image block, with guarantee can be at data distribution and when recovering unique definition by the position of scrambling image block with fill content.
The part that this data distribution control information comprises institute's scrambling is audio frequency or video, if the words of video, then should comprise by the information of the video blocks of scrambling, use such as the data mixer of information such as the quantity of video blocks, shape, size, position for receiving terminal.
Fig. 5 illustrates the system configuration schematic diagram of receiving terminal of the condition receiving system of the embodiment of the invention.
According to embodiments of the invention, compare existing kilocalorie scheme, in the CMMB of receiving terminal terminal, increased a descrambling data shunt and a data streambuf.The signal that receives from antenna through demodulation multiplexing after, data, data distribution control information and ECM, EMM and scrambling parameter are separated.Wherein data behind demodulation/demultiplexing and data distribution control information are sent to the descrambling data shunt, and ECM, EMM and scrambling parameter are sent to CAM-C.The descrambling data shunt utilizes the data distribution control information that the data of sending here are shunted, and the data stream buffer district directly is sent in the data and the data distribution control information of not scrambling, and the data of scrambling are sent to the descrambler in the card among the MMB-CAS.With this simultaneously, conditional access terminal module (CAM-C) in the middle card utilizes Entitlement Control Message (ECM), Entitlement Management Message (EMM) and scrambling parametric solution to separate out control word and be sent to descrambler, descrambler just can utilize this control word that the scrambled data of sending here from the descrambling data shunt is carried out descrambling, and the audio and video data streams behind the descrambling is delivered to data stream buffer district in the terminal.The data that the data stream buffer district utilizes the data distribution control information that two aspects are sent here are carried out synchronously and are merged, and produce complete audio and video data streams, play so that be sent to player.The scrambling and the descrambling process of whole mobile multi-media broadcasting service have so just been finished.
Fig. 6 illustrates the schematic diagram to video piecemeal scrambling mode according to the embodiment of the invention.In the embodiment of video scrambling piece shown in Figure 6, in original size is { x, choose a size in the video of y} and be { x2, the scrambling piece of y2}, if with the upper left corner of original video starting point as x and y coordinate, then this video scrambling piece is added the position for { effect of generation as shown in Figure 6 for x1, y1} place to the coordinate of original image.
At server end, comprise in the data distribution control information:
The frame number of scrambled frame: xxxxxxxxxx;
1, scrambling mode: video;
2, scrambling number of blocks: 1
3, original image size: x, y
4, scrambling piece position: x1, y1
5, scrambling block size: x2, y2
6, the content that should fill of the picture position of scrambling: buy contact method
Condition reception server end plucks out according to the image of these information with the assigned address in the image, and fills the predefined image that is included in the purchase contact method in the data distribution control information to this position.The parts of images that plucks out is sent to scrambler and carries out scrambling.The predefined image that is included in the purchase contact method in the data distribution control information of remaining image and filling is taken as and does not need the part of scrambling to send.
In the receiving terminal of condition receiving system shown in Figure 5, after at first the data of all receptions are all passed through the demodulation multiplexing process, isolate data distribution control information, later audio and video data streams, ECM, EMM and the scrambling parameter of demodulation/demultiplexing.Audio and video data streams behind data distribution control information and the demodulation/demultiplexing is sent to the descrambling data shunt then, and ECM, EMM and scrambling parameter are sent to CAM-C.Audio and video data streams after the descrambling data shunt utilizes above-mentioned data distribution control information to demodulation/demultiplexing is shunted, the data that do not have scrambling and the data distribution parameter that receive are sent to the data stream buffer district, the data of scrambling are sent to the descrambler on the card among the MMB-CAS, CAM-C parses control word and is sent to descrambler from ECM, EMM and scrambling parameter simultaneously, descrambler utilizes control word that scrambled data is carried out descrambling, and the audio and video data streams behind the descrambling is sent to data stream buffer district in the terminal.If the user does not authorize and causes the descrambling procedure failure, what the user saw in terminal is exactly audio, video data and the predefined image that is included in the purchase contact method in the data distribution control information that does not have scrambling fully, just has an incomplete picture of buying contact details as the image in Fig. 6 left side.If descrambling success, video data stream behind the descrambling just is sent to the data stream buffer district as the image on Fig. 6 right side, the data stream buffer district utilizes the data distribution parameter, image behind the descrambling is placed on the assigned address of designated frame according to the size of appointment, cover the image of former beginning and end scrambling part, just obtained a complete image.Audio-frequency unit also can use similar method to add descrambling.
Even other parts and not scrambling of audio-frequency unit to video are handled, the picture effect as Fig. 6 so also is that the user is difficult to accept.In the video of scrambling part, can also can show directly with the screen display of blank screen or other colors with advertisement picture, can also show the information of buying program as the contact of Fig. 6.How to show by stipulating in the data distribution control information and controlling.
What should indicate is, the method of scrambling can have various ways as previously mentioned, such as the video scrambling piece can be different shapes, different numbers, different positions and different sizes, but what should guarantee is, the data block of scrambling, the size of image block and quantity should be suitable, should be large enough to guarantee that the image block scrambling piece of these scramblings can bring enough negative effects to watching of user, being small enough to again can be not too large to data quantity transmitted between receiving terminal terminal and the card, to such an extent as to influence transmitting speed between the speed of scramble process and terminal and the card.The frame number of the Frame at the image block scrambling piece place of information such as the position of scrambling, shape, number, size and this scrambling has constituted aforesaid data distribution control information, and all characteristics of the affirmation scrambling block of video data that these data distribution control informations can be accurate and unique are so that receiving terminal carries out correct descrambling.
Fig. 7 illustrates according to the scrambling of the multi-media broadcasting service of the embodiment of the invention and the workflow diagram of de-scrambling method.This workflow is described as follows:
At first generate program source and the control information of data data distribution, the control information of data data distribution is sent to the data distribution controller then, and the data distribution controller utilizes the control information of data data distribution that the data shunt is controlled.The data distribution device separates program source according to the control of data distribution controller, and being separated into needs the scrambling part and do not need the scrambling part.Need the partial data of scrambling to be sent to scrambling module and carry out scrambling, generate data and ECM, EMM and scrambling parameter after the scrambling; These data and do not need the partial data of scrambling and the data distribution control information is sent to multiplexing together and modulator carries out multiplexing and broadcast by radio network the modulation back.
It is multiplexing at first to carry out demodulation to the received signal by the demodulation multiplexer at receiving terminal, obtain data distribution control information, later data and ECM, EMM and the scrambling parameter of demodulation/demultiplexing respectively, wherein the later data of data distribution control information and demodulation/demultiplexing are sent to the descrambling data shunt, utilize the data distribution control information that the later data of demodulation/demultiplexing are shunted by the descrambling data shunt, split into the partial data of not scrambling and the data of scrambling.Simultaneously ECM, EMM and scrambling parameter are sent to CAM-C, utilize scrambling parameter output control word by CAM-C, and the data of this control word and scrambling are sent to descrambler together, utilize control word that scrambled data is carried out descrambling by descrambler.The data stream buffer district is sent in the data and the data distribution control information of the data that descrambling is later and the not scrambling of shunting out from the descrambling data shunt together, there to the partial data of not scrambling and the data of descrambling merge, just obtained complete audio and video data streams afterwards.This data flow just can be sent to corresponding player and play.Under the situation that the user does not obtain the authorization, descrambler can send the descrambling failure information to the data stream buffer district, the data stream buffer district need after with the descrambling failure that comprises in the data distribution control information image of the purchase contact method that shows and not scrambled data merge demonstration.
Embodiments of the invention combine the advantage of kilocalorie and lesser calorie scheme in the prior art, are well solutions of the condition receiving system of compromise Mobile Multimedia Broadcasting.Because descrambler and CAM-C module all are placed on the card, so the user can realize " separation between machine and card ", simultaneously owing to only partial data is arranged by scrambling and descrambling, so can reduce the complexity of transmission control circuit of transfer of data between terminal and the condition reception intelligent card, condition reception intelligent card inside and the operand of condition reception intelligent card inside effectively, also guaranteed certain scrambling performance simultaneously, making does not have the user who authorizes can not normally watch the program that uppick needs.For the user who does not have to authorize, see that incomplete video harmony signal to noise ratio be can't see video fully and sound can impel them to go to buy mandate more.Can also carry out advertisement putting in the video area of descrambling not, also be an extraordinary scheme for MMB mobile multi-media broadcasting service operator.
Claims (19)
1. system that is used to send multi-medium data, this multi-medium data comprises voice data and video data, this system comprises:
The data distribution controller is used to receive the data distribution control information, and the shunting of this multi-medium data is controlled in control information according to data distribution;
The data distribution device, connect this data distribution controller, be used to receive this multi-medium data, and under the control of this data distribution controller, this multi-medium data is separated into multi-medium data that needs scrambling and the multi-medium data that does not need scrambling, and exports this multi-medium data that needs scrambling and this and do not need the multi-medium data of scrambling;
Scrambling module connects this data distribution device, is used to receive that this needs the multi-medium data of scrambling with scrambling; And
Multiplexing modulator, connect this scrambling module and this data distribution device, what be used for receiving respectively this scrambling module output is not needed the multi-medium data of scrambling by this of the multi-medium data of scrambling and the output of this data distribution device, and do not needed the multi-medium data of scrambling to carry out multiplexing modulation treatment by the multi-medium data of scrambling and this to this, so that send.
2. according to the system of claim 1, wherein, this data distribution control information specifies in this multi-medium data this to need the multi-medium data of scrambling and this not to need the multi-medium data of scrambling, and comprise and be used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not, and this data distribution device sends this data distribution control information to this multiplexing modulator.
3. according to the system of claim 1, also comprise the condition receiving front-end module, connect this scrambling module and this multiplexing modulator, be used to receive scrambling parameter and the control word of handling by the scrambling about this multi-medium data of this scrambling module acquisition, and the output Entitlement Control Message is given this scrambling module and this multiplexing modulator.
4. according to the system of claim 3, wherein this system is the server end in the condition receiving system of Mobile Multimedia Broadcasting.
5. system that is used for receiving multimedia data, this multi-medium data comprises voice data and video data, this system comprises:
Demodulation/demodulation multiplexer, be used to receive multi-medium data through multiplexing modulation treatment, and this multi-medium data carried out the demodulation multiplexing process, multi-medium data and data distribution control information after acquisition and output demodulation are multiplexing, wherein, this data distribution control information comprises and is used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not;
The descrambling data shunt, connect this demodulation/demodulation multiplexer, be used to receive multi-medium data and this data distribution control information after multiplexing of this demodulation, the multi-medium data after multiplexing separates to this demodulation to utilize this data distribution control information, to obtain and to export the multi-medium data of not scrambling and the multi-medium data of scrambling;
Descrambler connects this descrambling data shunt, and this that is used to receive this demodulating data shunt output be the multi-medium data of scrambling, to this multi-medium data of scrambling carry out descrambling, obtain and the output descrambling after multi-medium data; And
The data stream buffer district connects this descrambler and this descrambling data shunt, is used for receiving respectively not multi-medium data of scrambling of multi-medium data behind this descrambling and this, and carries out synchronously and merge handling, to export complete multi-medium data.
6. according to the system of claim 5, wherein, this descrambling data shunt is exported this data distribution control information and is given this data stream buffer district.
7. according to the system of claim 6, wherein, this data stream buffer district utilizes this data distribution control information, with the multi-medium data behind this descrambling and this not the multi-medium data of scrambling carry out synchronously and merge, to obtain complete multi-medium data.
8. according to the system of claim 5, also comprise the conditional access terminal module, this conditional access terminal module connects this demodulation/demodulation multiplexer and this descrambler, be used to receive Entitlement Control Message, Entitlement Management Message from this demodulation/demodulation multiplexer and the scrambling parameter of handling about the scrambling of this multi-medium data, therefrom parse control word and be sent to this descrambler; And this descrambler utilizes this control word that the scrambled data from this descrambling data shunt is carried out descrambling.
9. system according to Claim 8, wherein this system is the receiving terminal in the condition receiving system of Mobile Multimedia Broadcasting.
10. system according to Claim 8, wherein, this conditional access terminal module and this descrambler are integrated in together.
11. according to the system of claim 5, wherein, this data distribution control information also is included in needs the information that shows after the descrambling failure; This data stream buffer district does not have under the authorized situation the user, the information that should needing after descrambling failure of comprising in this data distribution control information shown and this not multi-medium data of scrambling merge processing, to export corresponding authorization failure information.
12. a method that sends multi-medium data, this multi-medium data comprises voice data and video data, and this method comprises:
Receive the data distribution control information, this data distribution control information is used to specify the multi-medium data that needs scrambling in this multi-medium data and does not need the multi-medium data of scrambling;
According to this data distribution control information, this multi-medium data is separated into multi-medium data that needs scrambling and the multi-medium data that does not need scrambling;
This needs the multi-medium data of scrambling scrambling; And
To not needed the multi-medium data of scrambling to carry out multiplexing modulation treatment, so that send by the multi-medium data of scrambling and this.
13. according to the method for claim 12, wherein, this multi-medium data that needs scrambling is a voice data.
14. according to the method for claim 12, wherein, this multi-medium data that needs scrambling is a part of video data.
15. according to the method for claim 12, wherein, this multi-medium data that needs scrambling is the partial video piece in voice data and the video data.
16. according to the method for claim 12, wherein, this multi-medium data that needs scrambling is a part of video data frame and a part of audio data frame in this multi-medium data.
17. a method that is used for receiving multimedia data, this multi-medium data comprises voice data and video data, and this method comprises:
Receive multi-medium data through multiplexing modulation treatment;
This multi-medium data is carried out the demodulation multiplexing process, to obtain multi-medium data and the data distribution control information of demodulation after multiplexing, wherein, this data distribution control information comprises and is used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not;
The multi-medium data after multiplexing separates to this demodulation to utilize this data distribution control information, with the multi-medium data that obtains not scrambling and the multi-medium data of scrambling;
To this multi-medium data of scrambling carry out descrambling, to obtain the multi-medium data behind the descrambling; And
Merge not multi-medium data of scrambling of multi-medium data behind this descrambling and this, to export complete multi-medium data.
18. a method that is used for receiving multimedia data, this multi-medium data comprises voice data and video data, and this method comprises:
Receive multi-medium data through multiplexing modulation treatment;
This multi-medium data is carried out the demodulation multiplexing process, to obtain multi-medium data and the data distribution control information of demodulation after multiplexing, wherein, this data distribution control information comprises and is used to distinguish the multi-medium data of scrambling and the full detail of the multi-medium data of scrambling not, and needs the information that shows after the descrambling failure;
Utilize this data distribution control information to this demodulation the multi-medium data after multiplexing shunt, with the multi-medium data that obtains not scrambling and the multi-medium data of scrambling;
Under the situation that the user does not obtain the authorization, send the descrambling failure information, and
With the information that needs after this descrambling failure that comprises in this data distribution control information to show and this not the multi-medium data of scrambling merge, with output authorization failure information.
19. according to the method for claim 18, the information that needs to show after this descrambling failure is advertising message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810181613A CN101742225A (en) | 2008-11-27 | 2008-11-27 | System and method for sending and receiving multimedia data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810181613A CN101742225A (en) | 2008-11-27 | 2008-11-27 | System and method for sending and receiving multimedia data |
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| Publication Number | Publication Date |
|---|---|
| CN101742225A true CN101742225A (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810181613A Pending CN101742225A (en) | 2008-11-27 | 2008-11-27 | System and method for sending and receiving multimedia data |
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| CN (1) | CN101742225A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102014372A (en) * | 2010-11-30 | 2011-04-13 | 中兴通讯股份有限公司 | Method, device and system for controlling service data traffic distribution |
| CN102711184A (en) * | 2012-06-18 | 2012-10-03 | 西安邮电学院 | Flow-splitting system of heterogeneous wireless network |
| CN102866972A (en) * | 2012-08-30 | 2013-01-09 | 北京中科晶上科技有限公司 | Accessing storing controller capable of supporting data descrambling and descrambling method for accessing storing controller |
| WO2015180035A1 (en) * | 2014-05-27 | 2015-12-03 | Empire Technology Development Llc | Secure images |
| CN105873048A (en) * | 2015-11-16 | 2016-08-17 | 乐视致新电子科技（天津）有限公司 | Wireless access control method and device, and router |
| CN106210816A (en) * | 2016-07-18 | 2016-12-07 | 青岛海信电器股份有限公司 | A kind of transport stream TS de-scrambling method and device |
| WO2018107467A1 (en) * | 2016-12-16 | 2018-06-21 | Thomson Licensing | Apparatus, method, and storage medium for providing preview of restricted video asset |
| CN110618887A (en) * | 2019-01-08 | 2019-12-27 | 李峻 | Multi-computer management control system |
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2008
- 2008-11-27 CN CN200810181613A patent/CN101742225A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102014372A (en) * | 2010-11-30 | 2011-04-13 | 中兴通讯股份有限公司 | Method, device and system for controlling service data traffic distribution |
| CN102014372B (en) * | 2010-11-30 | 2014-11-05 | 中兴通讯股份有限公司 | Method, device and system for controlling service data traffic distribution |
| CN102711184A (en) * | 2012-06-18 | 2012-10-03 | 西安邮电学院 | Flow-splitting system of heterogeneous wireless network |
| CN102711184B (en) * | 2012-06-18 | 2015-06-10 | 西安邮电学院 | Flow-splitting system of heterogeneous wireless network |
| CN102866972A (en) * | 2012-08-30 | 2013-01-09 | 北京中科晶上科技有限公司 | Accessing storing controller capable of supporting data descrambling and descrambling method for accessing storing controller |
| CN102866972B (en) * | 2012-08-30 | 2016-05-18 | 北京中科晶上科技有限公司 | The memory access controller of supported data descrambling and memory access controller de-scrambling method |
| WO2015180035A1 (en) * | 2014-05-27 | 2015-12-03 | Empire Technology Development Llc | Secure images |
| CN105873048A (en) * | 2015-11-16 | 2016-08-17 | 乐视致新电子科技（天津）有限公司 | Wireless access control method and device, and router |
| CN106210816A (en) * | 2016-07-18 | 2016-12-07 | 青岛海信电器股份有限公司 | A kind of transport stream TS de-scrambling method and device |
| WO2018107467A1 (en) * | 2016-12-16 | 2018-06-21 | Thomson Licensing | Apparatus, method, and storage medium for providing preview of restricted video asset |
| CN110618887A (en) * | 2019-01-08 | 2019-12-27 | 李峻 | Multi-computer management control system |
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