CN102014143A - Data receiving/sending terminal, device and method as well as set top box - Google Patents
Data receiving/sending terminal, device and method as well as set top box Download PDFInfo
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Abstract
The invention relates to a data receiving/sending terminal, device and method as well as a set top box, wherein the data receiving terminal sends the data request information of data requests carried out on required data blocks of streaming media data divided into multiple data blocks to other terminals through a P2P (Peer-to-Peer) network, receives the data blocks which correspond to the data request information from the other terminals, receives the streaming media data and plays streaming media at the same time. The data receiving terminal is characterized in that the data request information includes information expressing the emergency degree of the required data blocks.
Description
Technical field
The present invention relates to Data Receiving/transmission terminal, device, method and set-top box in the Internet, relate in particular to files in stream media transmission system based on P2P.
Background technology
P2P technology and Streaming Media used to combine be one of current research focus, the great advantage of P2P system is to make the user can effectively utilize the resource in the network, and these resources comprise data resource, bandwidth resources, also comprise computational resource.Almost do not have the bottleneck of original C/S model in the P2P system so this makes, good expandability is arranged.In the P2P model, each node (Peer) has been played the part of two kinds of roles simultaneously, be client be again server, as client can to other querying nodes and the request needed service, can provide service to other nodes as server.
The bit-torrent agreement), electric mule P2P application software such as (eMule agreements) has been nowadays widely popular on network owing to possess characteristics such as transmission speed is fast, bandwidth availability ratio height, (Multiple File Transfer Protocol: the multifile transportation protocol) BT of multi-source download technology is (based on the BitTorrent agreement: to adopt MFTP.The core of MFTP multi-source download technology comprises:
1) resource file is divided into isometric burst (piece), so that mark and processing;
2) which burst must understand the other side mutually between the node all has, so that exchange each other's needs, reaches the purpose of uploading while downloading;
Whether 3) node needs this burst of verification after receiving a burst correct.
In BT software, the integral body that node obtains file by " seed " file (Torrent) by name is described and the check code of each burst wherein; In the electricity mule, node goes out to obtain the check code of this burst from other nodes in downloading slicing.
The program request files in stream media needs to play while downloading.Though BT, electric mule etc. can be realized file at a high speed and be downloaded, but its all bursts to file (the control information burst that comprises document control information place) are implemented out of order download, so the broadcast while downloading that can't the support media file, node also just can only just can be play it behind this media file of complete download.
Publication number be " 200710062866.5 " patent application a kind of media file order program control method and device based on the P2P agreement, this device is the receiving terminal in the P2P network, it is according to urgency level (time of the current broadcast sheet of distance) the definition priority of each sheet, the sheet priority that degree of being pressed for time is high more is high more, then the highest sheet of override requests priority.This invention by always preferentially in a plurality of data fragmentations of downloads of media file near the data fragmentation of play position, under the P2P agreement, realized media file download, play and carry out simultaneously.
Though above-mentioned technology has realized playing while downloading to a certain extent, but there is following shortcoming: promptly, receiving terminal only sends the sheet number of the sheet of asking, and transmitting terminal may be received the request from a plurality of receiving terminals simultaneously, for these requests, transmitting terminal can not be judged urgency level, therefore can not respond according to the urgency level of these requests.This may cause the delay in the video request program.
As seen, also there is not transmitting terminal to determine the technology of its response order according to the urgency level of receiving terminal request msg among the P2P at present.
Summary of the invention
In order to optimize the transfer of data in the P2P network, reduce the delay of program request time, the invention provides data transmission system in a kind of P2P of the being applied to program request method of unifying, as the priority criteria that data transmit, the most urgent data will preferentially be transmitted this system and method with the urgency level of data (i.e. this data distance be played time).
The invention provides the data transmission system in a kind of P2P of being applied to program request, this system comprises a P2P server and a plurality of client, wherein client be data receiver be again data sending terminal.Receiving terminal sends the parameter of representing this data priority in when transmitting terminal sends request msg, the data of being asked can be sheets, can be frame also, represent this data priority parameter can but be not limited to the ID (sheet number or frame number) of time that the in progress position of receiving terminal, requested date distance is played, time that requested date is about to be played, requested date with just in the difference of played data ID (sheet number or frame number), priority-level etc.
Transmitting terminal is according to the data of receiving terminal request and represent the parameter of this data priority that prioritization is carried out in received request, and responds according to priority orders, and the request of data of limit priority will at first be responded.
According to apparatus and method of the present invention, can improve the efficient of P2P data transmission in network, reduce the stand-by period in the video request program.
Description of drawings
Figure 1A is system's pie graph of P2P network among the present invention;
Figure 1B is system's pie graph of C/S network among the present invention;
Fig. 2 A is the video structure schematic diagram that is applied in the P2P system of the present invention;
Fig. 2 B is the video structure schematic diagram in the C/S of the being applied to of the present invention system;
Fig. 3 A is the structural representation of receiving terminal of the present invention;
Fig. 3 B is the structural representation of transmitting terminal of the present invention;
Fig. 4 A is that receiving terminal of the present invention is the system configuration schematic diagram of set-top box;
Fig. 4 B is that transmitting terminal of the present invention is the system configuration schematic diagram of set-top box;
Fig. 5 A is the schematic diagram of " frame＜--〉sheet " of the present invention correspondence table;
Fig. 5 B is the schematic diagram of " frame＜--〉bag " of the present invention correspondence table;
Fig. 6 is the schematic diagram of priority-level definition list of the present invention;
Fig. 7 is the schematic diagram of request management table of the present invention;
Fig. 8 A is the data format of solicited message in the BitTorrent agreement;
Fig. 8 B is the data format of solicited message among the present invention;
Fig. 9 is the workflow diagram of receiving terminal of the present invention;
Figure 10 is the workflow diagram of transmitting terminal of the present invention.
Embodiment
Below with reference to embodiment the specific embodiment of the present invention is described:
Figure 1A is system's pie graph of P2P network of the present invention, and this system comprises: P2P server 100 is used to provide the have information of client to the data content; Client terminal devices 200,300,400 etc., mode order video file and online watching with P2P are uploading data for other clients in other client downloads data.
Figure 1B is system's pie graph of C/S network of the present invention, and this system comprises: C/S server 100 ' is used to client that video content is provided; Client terminal device 200 ', 300 ', 400 ' etc. is with mode order video file and online the watching of C/S.
Fig. 2 A is the video structure schematic diagram in the P2P of the being applied to of the present invention system, video file P is divided into an equal-sized N sheet, P1, P2...Pn, wherein Pc is the current play position of this video file P in receiving terminal, the sheet that Pr is asking for this receiving terminal, wherein each sheet is made up of a framing of fixed qty not, comprises frame F0, F1...Fa as P0.
Fig. 2 B is the video structure schematic diagram in the application of the present invention C/S system, N the packet that video file I is divided into equal and opposite in direction or does not wait, I1, I2...In, wherein Ic is the current play position of this video file I in receiving terminal, the bag that Ir is asking for this receiving terminal, wherein each packet is made up of a framing of fixed qty not, comprises frame F0, F1...Fa as I0.
Fig. 3 A is the structural representation of receiving terminal of the present invention, comprising: Data Receiving unit 301 is used to receive the data that send from transmitting terminal; Data playback unit 302 is used for playing video data; Play position acquiring unit 303 is used to obtain the ID (sheet number or frame number) of the current played data of video data; Request msg acquiring unit 304 is used to obtain data ID to be asked (sheet number or frame number); Urgency information generating unit 305 is used for calculating the urgency information for the treatment of request msg according to the current play position that request msg ID (sheet number or frame number) and current play position acquiring unit 303 obtain (sheet number or frame number) for the treatment of that request msg acquiring unit 304 obtains; Request transmitting unit 306 is used to send request msg ID (sheet number or frame number) and urgency information thereof to corresponding transmitting terminal; Memory cell 307 is used for the required information of storage computation urgency information, as " frame＜--〉sheet " correspondence table Fig. 5 A and priority-level definition list Fig. 6.
Fig. 3 B is the structural representation of transmitting terminal of the present invention, comprising: acquisition request unit 401 is used to obtain the request of data that sends from receiving terminal; Request management unit 402 is used to manage request management table; Priority calculation unit 403 is used for the priority of the urgency information calculations request of data that comprises according to the solicited message received from receiving terminal, and is managed by the 402 pairs of data solicited messages in request management unit according to the result of calculation of this priority; Data transmission unit 404 is used to send request msg to receiving terminal; Memory cell 405 is used for stored video data and request management table Fig. 7 described later.
Fig. 4 A is that receiving terminal of the present invention is the system configuration schematic diagram of set-top box, comprising: Data Receiving unit 301 ' is used to receive the data that send from transmitting terminal; Demodulating unit 302 ' is used for the audio, video data that demodulate reception arrives; Decoding unit 303 ' is used to the audio, video data of decoding; Audio frequency and video processing unit 304 ' is used to separate audio, video data; Output unit 305 ' is used for audio, video data is exported to playback equipment; Memory cell 306 is used to store the audio, video data, the required information of storage urgency information that receive, as " frame＜--〉sheet " correspondence table Fig. 5 A and priority-level definition list Fig. 6; Request msg acquiring unit 307 ', be used for according to memory cell 306 ' downloaded data obtain data ID to be asked (sheet number or frame number); Play position acquiring unit 308 ' is used for obtaining current video play position (sheet number or frame number) according to the video output information of output unit 305 '; Urgency information generating unit 309 ' is used for calculating the urgency information for the treatment of request msg according to the current play position that request msg ID (sheet number or frame number) and current play position acquiring unit 308 ' obtain (sheet number or frame number) for the treatment of that request msg acquiring unit 307 ' obtains; Request transmitting unit 3010 ' is used to send request msg ID (sheet number or frame number) and urgency information thereof to corresponding transmitting terminal.
Fig. 4 B is that terminal of the present invention is the system configuration schematic diagram of set-top box, comprising: Data Receiving unit 401 ' is used to receive the data that send from transmitting terminal; Demodulating unit 402 ' is used for the audio, video data that demodulate reception arrives; Decoding unit 403 ' is used to the audio, video data of decoding; Audio frequency and video processing unit 404 ' is used to separate audio, video data; Output unit 405 ' is used for audio, video data is exported to playback equipment; Memory cell 406 ' is used for stored video data and request management table Fig. 7; Request receiving element 407 ' is used to obtain the request of data that sends from receiving terminal; Request management unit 408 ' is used to manage request management table; Priority calculation unit 409 ', according to the priority of the urgency information calculations request of data that comprises the solicited message that receives from other set-top box, and by request management unit 408 ' the request of data information that receives is managed according to this priority result calculated; Data transmission unit 4010 ' is used to send request msg to receiving terminal.
Fig. 5 A is " frame＜--〉sheet " correspondence table in the P2P of the present invention system, comprises frame 501, sheet 502, the corresponding relation of expression frame and sheet.
Fig. 5 B is " frame＜--〉bag " correspondence table in the C/S of the present invention system, comprises frame 501 ', packet 502 ', the corresponding relation of expression frame and packet.
Fig. 6 is the schematic diagram of priority-level definition list of the present invention, and this table is according to having represented that sheet apart from the time T r that is played and the corresponding relation of priority-level, comprises Tr 601 and PL 602.
Fig. 7 is a request management table of the present invention, comprises receiving terminal 701, request msg 702, urgency information 703, priority 704.
Fig. 8 A is the data structure of receiving terminal solicited message in the BitTorrent agreement, comprises sheet numbers 801, piece bias internal position 802, request length 803.
Fig. 8 B is the data structure of receiving terminal solicited message of the present invention, comprises sheet number 801 ', sheet bias internal position 802 ', request length 803 ' and urgency information 804 '.
Fig. 9 is the workflow diagram of receiving terminal of the present invention.
Figure 10 is the workflow diagram of transmitting terminal of the present invention.
Urgency information generating unit 303 with Pr with and precedence information Tr1 send to request transmitting unit 306, request transmitting unit 306 will ask that (Pr Tr1) sends to corresponding transmitting terminal.
Embodiment one
Present embodiment is elaborated to receiving terminal in the P2P system with reference to Fig. 3 A, Fig. 5 A, Fig. 9, and wherein Qing Qiu data are sheet, and urgency information is the absolute time of current reproduction time to playing request sheet reproduction time.So-called absolute time is meant the distance request of the sending time constantly in the moment that the request sheet is played.
Fig. 3 A is the structural representation of receiving terminal, and this receiving terminal works in the P2P network configuration shown in Figure 1A.
Data Receiving unit 301 receives the audio, video data that transmits from other clients (transmitting terminal), data playback unit 302 playing audio-video datas, play position acquiring unit 303 obtains data playback unit 302 in progress frame Fc, and is sent to urgency information generating unit 305; Request msg acquiring unit 304 obtains the sheet Pr that will ask according to the download situation of data in the memory cell, and Pr is sent to urgency information generating unit 305; Urgency information PP is that the sheet of current broadcast is apart from request time of being played of sheet in this enforcement, so urgency information generating unit 305 need be obtained current reproduction time Tc and according to the reproduction time of current broadcast frame Fc with request sheet Pr computation requests sheet Pr, concrete computational methods are:
Urgency information generating unit 305 inquiry is stored in " frame＜--〉sheet " correspondence table in the memory cell 307, shown in Fig. 5 A, finding the pairing frame of Pr according to the corresponding relation of frame 501 and sheet 502 is (Fi, Fj), be that the frame that at first is played among the sheet Pr is Fi, so the time T w1 that the Pr distance is played can obtain:
Tw1=(Fi-Fc)/fr, wherein fr is generally 25 frames/s for the frame number of receiving terminal broadcast each second.
Can obtain urgency information thus is " (15s) " for (Tw1).Urgency information generating unit 305 joins request of data information with this urgency information (15s).
In the past, for example in the BitTorrent agreement file being divided into sheet, and may directly asking a sheet when request msg, and also may further be divided into littler slice to sheet, is that unit asks with slice.The request form that sends during request msg before the client is for (Length), wherein Pr is a sheet number for Pr, Begin, and Begin is sheet bias internal address, and Length is a data length.Only discussing with the sheet in the patent of the present invention is the situation of unit request, so sheet bias internal address is 0, and length is the length of sheet.
Therefore, the form of the request of data information of this generation can for (Pr, 0, length Tw1), after generating request of data information, sends to transmitting terminal by request transmitting unit 306.
Variation one
Identical with embodiment one, present embodiment is elaborated to the receiving terminal in the P2P system equally, and wherein Qing Qiu data are sheet, and different is the moment Tp that urgency information PP is about to be played for the request sheet.
Continue to use the example among the embodiment one, sheet as request is Pr, current time (that is, system time) is 16: 00, and the time that is played apart from this request sheet is 15s, then moment of being played of this sheet is 16: 00: 15, therefore will ask sheet Pr and urgency information Tp1 " (16: 00: 15) " to join request of data information, this moment, the form of this request of data information for example was (Pr, 0, length, Tp1).After generating request of data information, send to transmitting terminal.
In receiving transmitting system, can determine that this request sheet distance is played the concrete time constantly by transmitting terminal, receiving terminal can in time obtain the data of this request sheet.
Variation two
Identical with embodiment one, present embodiment is elaborated to the receiving terminal in the P2P system equally, and wherein Qing Qiu data are sheet, and different is that urgency information PP is the ID difference of receiving terminal request sheet and current broadcast sheet.Present embodiment has reduced the precision of request msg urgency level with respect to embodiment one, but has also reduced the amount of calculation of receiving terminal about urgency information PP simultaneously.
Followingly describe with reference to Fig. 3 A, Fig. 5 A.
Shown in Fig. 2 A, video file P is divided into an equal-sized N sheet.Suppose that the current broadcast sheet of receiving terminal is Pc, the request sheet is Pr.As shown in Figure 3A, play position acquiring unit 303 obtains current broadcast sheet Pc, and is sent to urgency information generating unit 305; Request msg acquiring unit 304 obtains request sheet Pr, and Pr is sent to urgency information generating unit 305; Because urgency information is the ID difference of request sheet and current broadcast sheet in the present embodiment, therefore urgency information generating unit 305 is calculated urgency information PP=Pr-Pc, then urgency information PP (Pr-Pc) is joined in the request of data information, the form of the request of data information of this generation can be as (Pr, 0, length, Pr-Pc).Send request of data by request transmitting unit 306 then.
Variation three
Identical with embodiment one, present embodiment selects the receiving terminal in the P2P system to be elaborated equally, wherein Qing Qiu data are sheet, different is, under the support of procotol, receiving terminal can also be directly determined the priority-level of request sheet according to the information (time or position etc.) of current broadcast sheet and request sheet, so urgency information PP can be priority-level, and this priority-level also is that the information according to current broadcast sheet and request sheet obtains.As shown in Figure 6, priority-level is that the P2P system is according to the priority level of request msg apart from the timing definition that is played.Present embodiment is sorted out with respect to the priority of a pair of request msg of embodiment, has reduced the priority-level of request msg, has simplified the processing of data sending terminal greatly.
Followingly receiving terminal is described with reference to Fig. 3 A, Fig. 5 A, Fig. 6.
As shown in Figure 3A, play position acquiring unit 301 obtains current broadcast frame Fc, and is sent to urgency information generating unit 305; The request msg acquiring unit obtains the sheet Pr that will ask, and Pr is sent to urgency information generating unit 305; Urgency information PP is a priority-level in the present embodiment, and urgency information generating unit 305 need be at first according to current broadcast frame Fc and the time T r1 that asks sheet Pr computation requests sheet Pr distance to be played, and concrete computational methods are:
Urgency information generating unit 305 inquiry is stored in " frame＜--〉sheet " correspondence table in the memory cell 307, shown in Fig. 5 A, finding the pairing frame of Pr according to the corresponding relation of frame 501 and sheet 502 is (Fi, Fj), be that the frame that at first is played among the sheet Pr is Fi, so the time T r1 that the Pr distance is played can obtain:
Tr1=(Fi-Fc)/fr, wherein fr is generally 25 frames/s for the frame number of receiving terminal broadcast each second.
After calculating Tr1, the urgency information generating unit is further inquired about priority-level definition list Fig. 6, supposes Tr1=15s, can find from Fig. 6, and Tr1 is at interval (the corresponding priorities rank PL=3 of 10s～30s);
Urgency information generating unit 303 according to Pr with and priority-level PL generate solicited message (Pr, 0, length PL), and sends to corresponding transmitting terminal by request transmitting unit 304 and carries out request of data.
Embodiment two
Identical with embodiment one, present embodiment selects the receiving terminal in the P2P system to be elaborated equally, and wherein Qing Qiu data are sheet, and urgency information is current time is requested the moment of sheet apart from broadcast time.Different with embodiment one is that in the present embodiment, receiving terminal is the set-top box with P2P function.
Present embodiment is elaborated to receiving terminal in the P2P system with reference to Fig. 4 A, Fig. 5 A.
In the present embodiment, the data of set-top box are downloaded and are carried out in the P2P mode.Its course of work is:
Data Receiving unit 301 ' is used to receive the data that send from transmitting terminal; Demodulating unit 302 ' is used for the audio, video data that demodulate reception arrives; Decoding unit 303 ' is used to the audio, video data of decoding; Audio frequency and video processing unit 304 ' is used to separate audio, video data; Output unit 305 ' is used for audio, video data is exported to playback equipment; Memory cell 306 ' is used to store the audio, video data, the required information of calculating urgency that receive, as " frame＜--〉sheet " correspondence table Fig. 5 A and priority-level definition list Fig. 6; Request msg acquiring unit 307 ', be used for according to memory cell 306 ' downloaded data obtain the sheet Pr of sheet to be asked, and Pr is sent to urgency information generating unit 309 '; The data that play position acquiring unit 308 ' is being exported according to output unit 305 ' are obtained the frame number Fc when the frame of forward direction display device output, and are sent to urgency information generating unit 309 '; Urgency information PP is the time that current time and sheet distance are played in the present embodiment, therefore urgency information generating unit 309 ' need be obtained current time Tc and calculate the time T w1 that this request sheet Pr distance is played according to current broadcast frame Fc and request sheet Pr, and concrete computational methods are:
Urgency information generating unit 309 ' inquiry is stored in " frame＜--〉sheet " correspondence table in the memory cell 307, shown in Fig. 5 A, finding the pairing frame of Pr according to the corresponding relation of frame 301 and sheet 302 is (Fi, Fj), be that the frame that at first is played among the sheet Pr is Fi, so the time T w1 that the Pr distance is played can obtain:
Tw1=(Fi-Fc)/fr, wherein fr is generally 25 frames/s for the frame number of receiving terminal broadcast each second.
Can obtain urgency information Tw1 thus, the time that is played as request sheet distance is 15 seconds, and then urgency information is " (15s) ".Urgency information generating unit 305 with Pr with and urgency information " (15s) ", in request of data information, add this urgency information.
In the BitTorrent agreement file being divided into sheet, may directly asking a sheet when request msg, also may further be divided into littler slice (fragment) to sheet, is that unit asks with slice.The request form that sends during request msg before the client is for (Length), wherein Pr is a sheet number for Pr, Begin, and Begin is sheet bias internal address, and Length is a data length.Only discussing with the sheet in the patent of the present invention is the situation of unit request, so sheet bias internal address is 0, and length is the length of sheet.
Therefore, the form of this request of data information can for (Pr, 0, length, Tw1), generate request of data information after, send to transmitting terminal by above-mentioned request transmitting unit 306.
Embodiment three
Present embodiment is elaborated to the receiving terminal in the P2P system with reference to figure 3A, wherein Qing Qiu data are frame, urgency information PP is that this frame pitch is from the time that is played, also can be changed to ID difference, the priority-level of claim frame and current broadcast frame as urgency information, with two variation of embodiment one.
As shown in Figure 3A, play position acquiring unit 303 obtains current broadcast frame Fc, and is sent to urgency information generating unit 305; The request msg acquiring unit obtains the frame Fr that will ask, and Fr is sent to urgency information generating unit 305; The time that urgency information is played for request sheet distance in the present embodiment, so urgency information generating unit 305 need be according to current broadcast frame Fc and request sheet Fr, the time that computation requests sheet Fr distance is played, concrete computational methods are:
Tr=(Fr-Fc1)/fr, wherein fr is generally 25 frames/s for the frame number of receiving terminal broadcast each second.
Urgency information generating unit 203, according to Fr with and after urgency information Tr generates request of data information, send to transmitting terminal by request transmitting unit 304, carry out request of data.
Embodiment four
The present invention goes for the C/S system equally.In the C/S system (as Figure 1B), client is the receiving terminal of data, the C/S server is a transmitting terminal, streaming media service adopts stream media protocol such as RTP to carry out transfer of data, in stream media protocol, data are divided into one by one packet in proper order according to its time, and data are that unit transmits with the bag.Shown in Fig. 2 B, video file I is divided into n packet, and these bags may may not wait by equal and opposite in direction yet, and each packet comprises the frame of some.
Present embodiment is elaborated to the client in the C/S system with reference to Fig. 3 A, wherein Qing Qiu data are frame, urgency information PP is that this frame pitch is from the time that is played (urgency information also can be changed to ID difference, the priority-level of claim frame and current broadcast frame, with two variation of embodiment one).
As shown in Figure 3A, play position acquiring unit 301 obtains current broadcast frame Fc, and is sent to urgency information generating unit 305; The request msg acquiring unit obtains the frame Fr that will ask, and Fr is sent to urgency information generating unit 303; The time that urgency information is played for request sheet distance in the present embodiment, so urgency information generating unit 305 need calculate the time T r1 that this request sheet Fr distance is played according to current broadcast frame Fc and request sheet Fr, specifically computational methods are:
Tr1=(Fr-Fc1)/fr, wherein fr is generally 25 frames/s for the frame number of client broadcast each second.
According to Fr1 with and after urgency information Tr1 generates request of data information, send to corresponding server end by transmitting element 306.
In above each embodiment and variation, with request msg acquiring unit (301,307 '), play position acquiring unit (302,308 ') and urgency information generating unit (305,309 ') are separately narrated, its objective is in order to make explanation more simple and clear, but in actual applications, can carry out the obtaining of information of current broadcast sheet and request sheet by same handling part, and generate urgency information and it is joined whole processing in the request of data information according to the above-mentioned information that gets access to.
Embodiment five
Present embodiment is elaborated to transmitting terminal in the P2P system with reference to figure 3B and Fig. 7, this transmitting terminal receives the request of data information from receiving terminal, and the urgency information PP that in request of data information, comprises the request sheet of this receiving terminal, the absolute time that this urgency information PP is played for this sheet distance.So-called absolute time as mentioned above, is meant the distance request of the sending time constantly in the moment that the request sheet is played in receiving terminal.
With reference to figure 7, transmitting terminal respectively from receiving terminal R1, R2, R3 obtained request (Pr, 0, length, Tw1), (Pr2,0, length, Tw2), (Pr3,0, length, Tw3), below with (Pr, 0, length Tw1) is the course of work of example narration transmitting terminal.
Shown in Fig. 3 B, acquisition request unit 401 obtain the request of data that sends from receiving terminal R1 (Pr, 0, length Tw1), and sends it to request management unit 402; Request management unit 402 is stored in this request among request management table Fig. 7 in the memory cell 405, as figure, respectively R1, Pr, Tw1 is deposited in receiving terminal 701, request msg 702, urgency information 703, and with (Pr, 0, length Tw1) sends to priority calculation unit 403; Priority calculation unit 403 is carried out the urgency information sorting according to 703 1 row of the urgency information among Fig. 7 to this request, because the value of Tw is more little, representative request sheet is near more apart from reproduction time, and therefore, Tw is more little, then priority is high more, in this example, suppose Tw1＜Tw2＜Tw3, then priority is Pr＞Pr2＞Pr3, the priority of Pr is the highest, so the priority 704 that priority calculation unit 403 is provided with Pr in the table 7 is P1=3; Find the highest request of priority in the request management table of data transmission unit 404 from memory cell 405, the data of its request are sent to corresponding receiving terminal.
Simultaneously, the request management table Fig. 7 in the request management unit 402 real-time update memory cell 405 specifically is expressed as, and As time goes on, urgency information 703 (Tw) can correspondingly reduce priority and improve.
Variation one
Identical with embodiment four, present embodiment selects the transmitting terminal in the P2P system to be elaborated equally, this transmitting terminal receives the request of data information from receiving terminal, and in request of data information, comprise the urgency information PP of the request sheet of this receiving terminal, different is, this urgency information PP is the moment Tp that the request sheet is played, i.e. system time.
With reference to figure 7, suppose transmitting terminal respectively from receiving terminal R1, R2, R3 obtained request (Pr, 0, length, Tp1), (Pr2,0, length, Tp2), (Pr3,0, length, Tp3), below with (Pr, 0, length Tp4) is the course of work of example narration transmitting terminal.
Shown in Fig. 3 B, acquisition request unit 401 obtain the request of data that sends from receiving terminal R1 (Pr, 0, length Tp1), and sends it to request management unit 402; Request management unit 402 is stored in this request among request management table Fig. 7 in the memory cell 405, as figure, respectively R1, Pr, Tp1 is deposited in receiving terminal 701, request msg 702, urgency information 703, and with (Pr, 0, length Tp1) sends to priority calculation unit 403; Priority calculation unit 403 sorts to urgency information according to 703 1 row of the urgency information among Fig. 7, because the value of Tp1 is more little, representative request sheet is near more apart from reproduction time, and therefore, Tp1 is more little, then priority is high more, in this example, suppose Tp1＜Tp2＜Tp3, then priority is Pr＞Pr2＞Pr3, the priority of Pr is the highest, so the priority 704 that priority calculation unit 403 is provided with Pr in the table 7 is P1=3; Find the highest request of priority in the request management table of data transmission unit 404 from memory cell 405, the data of its request are sent to corresponding receiving terminal.
Simultaneously, the request management table Fig. 7 in the request management unit 402 real-time update memory cell 405 specifically is expressed as, and As time goes on, the request sheet of urgency information 703 is play moment Tp and can not changed, but forward because of sorting, and makes priority improve.Utilize the so-called urgency information of broadcast moment Tp of system time request sheet, can reduce the operand of transmitting terminal
Variation two
Identical with embodiment four, present embodiment selects the transmitting terminal in the P2P system to be elaborated equally, this transmitting terminal receives the request of data information from receiving terminal, and the urgency information PP that in request of data information, comprises the request sheet of this receiving terminal, different is that urgency information PP is the ID difference of receiving terminal request sheet and current broadcast sheet.Present embodiment has reduced the precision of request msg urgency level with respect to embodiment four, but has reduced the amount of calculation of receiving terminal about urgency information PP.
Followingly describe with reference to Fig. 3 B and Fig. 7.
With reference to figure 7, suppose transmitting terminal respectively from receiving terminal R1, R2, R3 obtained request (Pr, 0, length, Pr-Pc1), (Pr2,0, length, Pr2-Pc2), (Pr3,0, length, Pr3-Pc3), below with (Pr, 0, length Pr-Pc1) is the course of work of example narration transmitting terminal.
Shown in Fig. 3 B, acquisition request unit 401 obtain the request of data that sends from receiving terminal R1 (Pr, 0, length Pr-Pc1), and sends it to request management unit 402; Request management unit 402 is stored in this request among request management table Fig. 7 in the memory cell 405, as figure, respectively R1, Pr, Pr-Pc1 is deposited in receiving terminal 701, request msg 702, urgency information 703, and with (Pr, 0, length Pr-Pc1) sends to priority calculation unit 403; Priority calculation unit 403 sorts to urgency information according to 703 1 row of the urgency information among Fig. 7, because the value of Pr-Pc is more little, representative request sheet is near more apart from reproduction time, and therefore, Pr-Pc is more little, then priority is high more, in this example, suppose Pr-Pc1＜Pr2-Pc2＜Pr3-Pc3, then priority is Pr＞Pr2＞Pr3, the priority of Pr is the highest, so the priority 704 that priority calculation unit 403 is provided with Pr in the table 7 is P1=3; Find the highest request of priority in the request management table of data transmission unit 404 from memory cell 405, the data of its request are sent to corresponding receiving terminal.
Variation three
Identical with embodiment four, present embodiment selects the transmitting terminal in the P2P system to be elaborated equally, this transmitting terminal receives the request of data information from receiving terminal, and the urgency information PP that in request of data information, comprises the request sheet of this receiving terminal, different is that urgency information PP is a priority-level.As shown in Figure 6, priority-level is that the P2P system is according to the priority level of request msg apart from the timing definition that is played.Present embodiment is sorted out with respect to the priority-level of a pair of request msg of embodiment, has reduced the priority progression of request msg, has simplified the processing of transmitting terminal greatly.
With reference to figure 7, transmitting terminal respectively from receiving terminal R1, R2, R3 obtained request (Pr, 0, length, PL), (Pr2,0, length, PL2), (Pr3,0, length, PL3), below with (Pr, 0, length PL) is the course of work of example narration transmitting terminal.
Shown in Fig. 3 B, acquisition request unit 401 obtains the request of data that sends from receiving terminal R1, and (Pr PL), and sends it to request management unit 402; Request management unit 402 is stored in this request among request management table Fig. 7 in the memory cell 405, as figure, respectively R1, Pr, PL is deposited in receiving terminal 701, request msg 702, urgency information 703, and with (Pr, 0, length PL) sends to priority calculation unit 403; Priority calculation unit 403 sorts according to the priority-level PL of 703 1 row of the urgency information among Fig. 7 to urgency information, because the value of PL is big more, representative request sheet is near more apart from reproduction time, and therefore, PL is big more, then priority is high more, in this example, suppose PL＞PL2＞PL3, then priority is Pr＞Pr2＞Pr3, the priority of Pr is the highest, so the priority 704 that priority calculation unit 403 is provided with Pr in the table 7 is P1=3; Find the highest request of priority in the request management table of data transmission unit 404 from memory cell 405, the data of its request are sent to corresponding receiving terminal.
Embodiment six
Identical with embodiment five, present embodiment selects the set-top box of the transmitting terminal in the P2P system to be elaborated equally, receiving terminal set-top box relative set among set-top box in the present embodiment and the embodiment two is in consolidated network, it receives the request of data information from the set-top box of transmitting terminal, in the request of data information that is received, comprise urgency information PP, in the present embodiment, urgency information PP is the absolute time that this sheet distance is played.And, the set-top box with P2P function of transmitting terminal.So-called absolute time as mentioned above, is meant the distance request of the sending time constantly in the moment that the request sheet is played in the transmitting terminal.
Present embodiment is with reference to Fig. 4 B, and Fig. 7 is elaborated to the transmitting terminal in the P2P system.
In the present embodiment, the data of set-top box are downloaded and are carried out in the P2P mode.Its course of work is:
Data Receiving unit 401 ' is used to receive the data that send from transmitting terminal; Demodulating unit 402 ' is used for the audio, video data that demodulate reception arrives; Decoding unit 403 ' is used to the audio, video data of decoding; Audio frequency and video processing unit 404 ' is used to separate audio, video data; Output unit 405 ' is used for audio, video data is exported to playback equipment; Memory cell 406 ' is used for stored video data and request management table Fig. 7; Request receiving element 407 ' is used to obtain the request of data that sends from receiving terminal; Request management unit 408 ' is used to manage request management table; Priority calculation unit 409 ' is used for the priority of calculated data request; Data transmission unit 4010 ' is used to send request msg to receiving terminal.
With reference to figure 7, suppose transmitting terminal respectively from receiving terminal R1, R2, R3 obtained request (Pr, 0, length, Tw1), (Pr2,0, length, Tw2), (Pr3,0, length, Tw3), below with (Pr, 0, length Tw1) is the course of work of example narration transmitting terminal.
Shown in Fig. 3 B, acquisition request unit 407 ' obtain the request of data that sends from receiving terminal R1 (Pr, 0, length Tw1), and sends it to request management unit 408 '; Request management unit 402 is stored in this request among request management table Fig. 7 in the memory cell 406 ', as figure, respectively R1, Pr, Tw1 is deposited in receiving terminal 701, request msg 702, urgency information 703, and with (Pr, 0, length Tw1) sends to priority calculation unit 409 '; Priority calculation unit 409 ' sorts to urgency information PP according to 703 1 row of the urgency information among Fig. 7, because the value of Tw is more little, representative request sheet is near more apart from reproduction time, and therefore, Tw is more little, then priority is high more, in this example, suppose Tw1＜Tw2＜Tw3, then priority is Pr＞Pr2＞Pr3, the priority of Pr is the highest, so the priority 704 that priority calculation unit 409 ' is provided with Pr in the table 7 is P1=3; Find the highest request of priority in the request management table of data transmission unit 4010 ' from memory cell 406 ', the data of its request are sent to corresponding receiving terminal.
Simultaneously, the request management table Fig. 7 in the request management unit 402 real-time update memory cell 406 ' specifically is expressed as, and As time goes on, the request sheet reproduction time Tw of urgency information 703 can corresponding reducing.
Embodiment seven
Present embodiment is elaborated to the transmitting terminal in the P2P system with reference to figure 3B, Fig. 5 A and Fig. 7, and the request msg that wherein receives is a frame, urgency information PP for this frame pitch from the moment Tr that is played, i.e. system time.
With reference to figure 7, suppose transmitting terminal respectively from receiving terminal R1, R2, R3 obtained request (Fr1, Tr1), (Fr2, Fr2), (Fr3, Tr3), below so that (Fr1 Tr1) is the course of work of example narration transmitting terminal.
Shown in Fig. 3 B, acquisition request unit 401 obtains the request of data that sends from receiving terminal R1, and (Fr1 Tr1), and sends it to request management unit 402; Because the data of this request are frame, and the transmission of data is unit with the sheet among the P2P, need find pairing data of this frame, therefore, " frame＜--〉sheet " the correspondence table Fig. 5 A in the memory cell 405 is at first inquired about in request management unit 402, find the sheet data of Fr1 correspondence, be assumed to be Pr1, then this request is stored among the request management table Fig. 7 in the memory cell 405, as figure, respectively R1, Pr1, Tr1 are deposited in receiving terminal 701, request msg 702, urgency information 703, and with (Pr1 Tr1) sends to priority calculation unit 403; The absolute time that priority calculation unit 403 is play the request sheet of urgency information according to 703 1 row of the urgency information among Fig. 7 sorts, because the value of Tr is more little, representative request sheet is near more apart from reproduction time, and therefore, Tr is more little, then priority is high more, in this example, suppose Tr1＜Tr2＜Tr3, then priority is Pr1＞Pr2＞Pr3, the priority of Pr1 is the highest, so the priority 704 that priority calculation unit 403 is provided with Pr1 in the table 7 is P1=3; Find the highest request of priority in the request management table of data transmission unit 404 from memory cell 405, the data of its request are sent to corresponding receiving terminal.
Simultaneously, the request management table Fig. 7 in the request management unit 402 real-time update memory cell 405 specifically is expressed as, and As time goes on, urgency information 703Tr can not change, and therefore can alleviate the operand of transmitting terminal.
Embodiment eight
The present invention goes for the C/S system equally.In the C/S system (as Figure 1B), client is a receiving terminal, and the C/S server is a transmitting terminal, streaming media service adopts stream media protocol such as RTP to carry out transfer of data, in stream media protocol, data are divided into one by one packet in proper order according to its time, and data are that unit transmits with the bag.Shown in Fig. 2 B, video file I is divided into n packet, and these bags may may not wait by equal and opposite in direction yet, and each packet comprises the frame of some.
Present embodiment is elaborated to the receiving terminal in the C/S system with reference to Fig. 3 B, Fig. 5 B and Fig. 7, wherein Qing Qiu data are frame, urgency information PP is that this frame pitch is from the time that is played (urgency information also can be changed to ID difference, the priority-level of claim frame and current broadcast frame, with two variation of embodiment one).
Shown in Fig. 3 B, acquisition request unit 401 obtains the request of data that sends from receiving terminal R1, and (Fr1 Tr1), and sends it to request management unit 402; Because the data of this request are frame, and being unit with the packet, the C/S stream media service system carries out transfer of data, need find the packet of this frame correspondence, therefore, " frame＜--〉bag " the correspondence table Fig. 5 B in the memory cell 405 is at first inquired about in request management unit 402, find the packet of Fr1 correspondence, be assumed to be Ir1, then this request is stored among the request management table Fig. 7 in the memory cell 405, as figure, respectively with R1, Pr1, Tr1 deposits receiving terminal 701 in, request msg 702, urgency information 703, and with in the solicited message (Fr1 Tr1) sends to priority calculation unit 403; Priority calculation unit 403 is listed as the urgency information sorting according to the urgency information among Fig. 7 703 1, because the value of Tr is more little, represent request data package near more apart from reproduction time, therefore, Tr is more little, then priority is high more, in this example, suppose Tr1＜Tr2＜Tr3, then priority is Ir1＞Ir2＞Ir3, the priority of Ir1 is the highest, so the priority 704 that priority calculation unit 403 is provided with Ir1 in the table 7 is P1=3; Find the highest request of priority in the request management table of data transmission unit 404 from memory cell 405, its requested packets is sent to corresponding receiving terminal.
Simultaneously, the request management table in the request management unit 402 real-time update memory cell 405.
More than among each embodiment, dispensing device separated being illustrated with receiving system, but, above-mentioned dispensing device and receiving system can be arranged in the same terminal, thereby realize P2P file-sharing on the network as the transmission and reception apparatus that is applied to the networking.
In addition, in the above-described embodiments for the ease of realizing, used the time of current broadcast frame to send constantly as request as absolute time, because the raising of the processor processing ability of implement device, the time delay of playing constantly and send the moment existence of request can be left in the basket.
In addition, in above each embodiment and variation, as urgency information, absolute time with the playing request sheet, the moment of playing request sheet (promptly, system time) and when anter and the position of request between the sheet apart from being illustrated for example, but those skilled in the art by above-mentioned example as can be known, as long as learn time or positional information when anter and request sheet, can at random generate urgency information, both of reproduction time that for example will work as anter and request sheet, or both of position are as urgency information, also can reach same technique effect, just as preferred, as the foregoing description and variation, can further reduce the amount of calculation of transmitting terminal, improve the efficient of handling.And, can utilize reproduction time and positional information when anter and request sheet, generate the relevant information of priority-level, as urgency information.
In addition, all be to be the explanation that example is carried out among the above embodiment with the playing stream media, but for other Streaming Medias, the present invention is suitable for too, especially for big volume flow medium are carried out in the system of data processing, for example, compression is handled, and needs continuously Streaming Media to be operated, therefore utilize the present invention in time to receive and handle continuous data block in a period of time afterwards, thereby improved treatment effeciency greatly.
In addition, in above embodiment, be that example is illustrated mainly, but be equally applicable to the reception transmission of C/S mode, can not effectively utilize the bandwidth of server end with the P2P network, the continuous data that can also guarantee client as much as possible is handled, and provides convenience for the user uses.
Claims (23)
1. data receiving terminal, send the request of data information of the desired data piece in the stream medium data that is divided into a plurality of data blocks being carried out request of data by the P2P network to other-end, receive the data block corresponding from other-end with request of data information, in the receiving stream media data, play this Streaming Media, it is characterized in that:
The information that in described request of data information, comprises the urgency of expression desired data piece.
2. data receiving terminal as claimed in claim 1 is characterized in that:
Play the moment of desired data piece on the estimation, generate the information of described expression urgency.
3. data receiving terminal as claimed in claim 1 is characterized in that:
According to the quantity of the data block between current in progress data block and the desired data piece, generate the information of described expression urgency.
4. data receiving terminal as claimed in claim 1 is characterized in that:
Generate the information of described expression urgency according to beginning to the absolute time of playing the desired data piece from the moment of carrying out request of data.
5. data send terminal, the request of data information that receives according to the other-end from the P2P network, the data block in the Streaming Media that is divided into a plurality of data blocks is asked, send the data block corresponding to other-end, it is characterized in that with request of data information:
Comprise according to received request of data information, expression carries out the information of urgency of the other-end desired data piece of request of data, decides the priority that sends the data block corresponding with this solicited message.
6. data as claimed in claim 5 send terminal, it is characterized in that:
The information of described expression urgency comprises, carries out the moment that the other-end of request of data estimates to play its desired data piece, and this is priority height more early constantly.
7. data as claimed in claim 6 send terminal, it is characterized in that:
The information of described expression urgency comprises, carries out the current in progress data block of terminal of request of data and the quantity of the data block between the desired data piece, and the few more priority of the quantity of this data block is high more.
8. data as claimed in claim 6 send terminal, it is characterized in that:
The information of described expression urgency comprises that the other-end that carries out request of data began to the absolute time of playing the desired data piece from the moment of carrying out request of data, and this time, short more priority was high more.
9. data sink, send the request of data information of the desired data piece in the stream medium data that is divided into a plurality of data blocks being carried out request of data by the data sending device of P2P network in network, receive the data block corresponding from data sending device with request of data information, in the receiving stream media data, play this Streaming Media, it is characterized in that, comprising:
Send the request transmitting unit of request of data information to data sending device;
Receive the Data Receiving unit of data from data sending device;
The memory cell of the data of the Streaming Media that storage receives;
The data playback unit of the stream medium data that broadcast receives; And
Obtain the information of the in progress data block of information and data playback unit of desired data piece, generate the information of the urgency of expression desired data piece, and the information of described urgency is attached to solicited message generating unit in the request of data information.
10. data sink as claimed in claim 9 is characterized in that:
In the described request information generating unit, according to the information of desired data piece and the information of in progress data block, calculate the moment of estimating to play the desired data piece, or the quantity of the data block between current in progress data block and the desired data piece, or begin to generate the information of described urgency from the moment of carrying out request of data to the absolute time of playing the desired data piece.
11. data sending device, receive the request of data information of the desired data piece the stream medium data that is divided into a plurality of data blocks being carried out request of data by the P2P network from data sink, and to the data sink transmission data block corresponding with request of data information, it is characterized in that, comprising:
Receive the request receiving element of request of data information from data sink;
Send the data transmission unit of data to data sink;
The information of the urgency of analytic representation data sink desired data piece from the request of data information that receives, and send the solicited message administrative unit of the priority of desired data piece to described data sink according to the information decision of the urgency of this expression desired data piece
The information of the urgency of described expression desired data piece comprises, the information of data block that data sink is asked and the in progress data block of this data sink.
12. data sending device as claimed in claim 11 is characterized in that:
The described request information management unit, the expectation that comprises in the information according to the urgency of described expression desired data piece is play the quantity of the data block between the moment, current in progress data block and the desired data piece of desired data piece or is begun to the time of playing the desired data piece from the moment of carrying out request of data, decides the priority to described data sink transmission desired data piece.
13. data receive method, be to send the request of data information of the desired data piece in the stream medium data that is divided into a plurality of data blocks being carried out request of data by the data sending device of P2P network in network, receive the data block corresponding from data sending device with request of data information, in the receiving stream media data, play the data receive method that uses in the data sink of this Streaming Media, it is characterized in that
When carrying out request of data, comprise the steps:
Obtain the information of desired data piece;
Obtain the information of in progress data block;
Generate the information of the urgency of expression desired data piece according to the information of the information of desired data piece and in progress data block;
Be attached in the request of data information according to information described urgency;
Send described request of data information to data sending device.
14. data receive method as claimed in claim 13 is characterized in that:
According to the information of desired data piece and the information of in progress data block, calculate the moment of estimating to play the desired data piece, or the quantity of the data block between current in progress data block and the desired data piece, or begin to generate the information of described urgency from the moment of carrying out request of data to the time of playing the desired data piece.
15. data transmission method for uplink, be to receive the request of data information of the desired data piece the stream medium data that is divided into a plurality of data blocks being carried out request of data from data sink by the P2P network, and the data transmission method for uplink that in the data sending device of the data sink transmission data block corresponding, uses with request of data information, it is characterized in that, comprise the steps:
Reception comprises the information of the urgency of expression data sink desired data piece from the request of data information of data sink in this request of data information,
According to the priority of the information decision transmission of the described expression urgency data block corresponding with this solicited message,
According to the order of priority, and to the data sink transmission data block corresponding with solicited message.
16. data transmission method for uplink as claimed in claim 15 is characterized in that:
The described expectation that comprises in the information according to the urgency of described expression desired data piece is play the quantity of the data block between the moment, current in progress data block and the desired data piece of desired data piece or is begun to the time of playing the desired data piece from the moment of carrying out request of data, and decision is to the priority of described data sink transmission desired data piece.
17. a Data Receiving sends terminal, send the request of data information of the desired data piece in the stream medium data that is divided into a plurality of data blocks being carried out request of data by the other-end of P2P network in network, receive the data block corresponding from other-end with request of data information, in the receiving stream media data, play this Streaming Media, and, receive the request of data information of the desired data piece the stream medium data that is divided into a plurality of data blocks being carried out request of data from other-end, and, it is characterized in that to the other-end transmission data block corresponding with request of data information:
Comprise data sink as claimed in claim 9 and data sending device as claimed in claim 11.
18. Data Receiving as claimed in claim 17 sends terminal, it is characterized in that:
In the described request information generating unit, according to the information of desired data piece and the information of in progress data block, calculate the moment of estimating to play the desired data piece, or the quantity of the data block between current in progress data block and the desired data piece, or begin to generate the information of described urgency from the moment of carrying out request of data to the time of playing the desired data piece.
19. Data Receiving as claimed in claim 17 sends terminal, it is characterized in that:
The described request information management unit, the described expectation that comprises in the information according to the urgency of described expression desired data piece is play the quantity of the data block between the moment, current in progress data block and the desired data piece of desired data piece or is begun to the time of playing the desired data piece from the moment of carrying out request of data, decides the priority to described data sink transmission desired data piece.
20. set-top box, send the request of data information of the desired data piece in the stream medium data that is divided into a plurality of data blocks being carried out request of data by the P2P network to other set-top box, receive the data block corresponding from other set-top box with request of data information, in the receiving stream media data, play this Streaming Media, it is characterized in that having:
Send the request transmitting unit of request of data information to other set-top box;
Receive the Data Receiving unit of data from other set-top box;
The memory cell of the data of the Streaming Media that storage receives;
The data playback unit of the stream medium data that broadcast receives; And
Obtain the information of the in progress data block of information and data playback unit of desired data piece, generate the information of the urgency of expression desired data piece, and the information of described urgency is attached to solicited message generating unit in the request of data information.
21. set-top box as claimed in claim 20 is characterized in that:
In the described request information generating unit, according to the information of desired data piece and the information of in progress data block, calculate the moment of estimating to play the desired data piece, or the quantity of the data block between current in progress data block and the desired data piece, or begin to generate the information of described urgency from the moment of carrying out request of data to the time of playing the desired data piece.
22. set-top box, receive the request of data information of the desired data piece the stream medium data that is divided into a plurality of data blocks being carried out request of data by the P2P network from other set-top box, and to other set-top box transmissions data block corresponding with request of data information, it is characterized in that, comprising:
Receive the request receiving element of request of data information from other set-top box;
Send the data transmission unit of data to other set-top box;
The information of the urgency of other set-top box desired data pieces of analytic representation from the request of data information that receives, and send the solicited message administrative unit of the priority of desired data pieces to other set-top box according to the information decision of the urgency of this expression desired data piece
The information of the urgency of described expression desired data piece comprises, the information of data block that other set-top box are asked and the in progress data block of this data sink.
23. set-top box as claimed in claim 22 is characterized in that:
The described request information management unit, the expectation that comprises in the information according to the urgency of described expression desired data piece is play the quantity of the data block between the moment, current in progress data block and the desired data piece of desired data piece or is begun to the time of playing the desired data piece from the moment of carrying out request of data, decides the priority to described data sink transmission desired data piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101710717A CN102014143A (en) | 2009-09-04 | 2009-09-04 | Data receiving/sending terminal, device and method as well as set top box |
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| CN2009101710717A CN102014143A (en) | 2009-09-04 | 2009-09-04 | Data receiving/sending terminal, device and method as well as set top box |
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Application publication date: 20110413 |