CN1826821A - Image data communication system and image data communication method - Google Patents
Image data communication system and image data communication method Download PDFInfo
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Abstract
An image data communication system that enables a suppression of the loss of data during a handover interval without entailing insufficiency of network resources includes: image data distribution device 101 for sequentially distributing, with prescribed time differences, encoded image data 1 and 2 in which an identical image has been encoded; and image data reception device 107 for receiving encoded image data 1 and 2 that have been distributed from image data distribution device 101 while moving among a plurality of radio areas. Image data reception device 107, at the time of handover that occurs during movement from a current radio area to another neighboring radio area, receives over a prescribed interval encoded image data 1 and 2 having prescribed time differences that are distributed from image data distribution device 101, and selects necessary data from the encoded image data 1 and 2 that have been received to reconstruct one set of encoded image data.
Description
Technical field
The present invention relates to be used to utilize mobile communications network to distribute and/or receive the method, apparatus and system of motion picture view data.The invention still further relates to the program that is used to distribute and/or receive such motion picture view data.
Background technology
In recent years, be used to transmit utilization has been used as effective transmitting moving picture image data based on the whole bag of tricks of the coded data of the efficient compression realization of inter prediction method.In these transmission methods, by the parameter of prediction and the residual image data of prediction are encoded, can be implemented in the minimizing of the amount of information of the motion picture view data that has high correlation on the time orientation, the parameter of wherein said prediction and the residual image data of prediction be by go up based on the time preceding and after the image of frame after to coding predict and obtain.In addition, the transition coding and the quantification of residual motions image data of prediction realized more high efficiency compressed encoding, and thereby can come the transmitting moving picture image data with limited transmission bandwidth.
The representative illustration of above-mentioned transmission method comprises the method for compaction coding method use such as MPEG (motion picture expert group)-1, MPEG-2 and the MPEG-4.In these compaction coding methods, the picture frame experience of input is by with the rectangular area (being called as " macro block ") with fixed dimension being the inter prediction that the motion compensation of unit is carried out, and is performed variable-length encoding by the residual image data of prediction being carried out compressed motion vector and signal data that two-dimension discrete cosine transform and quantification obtain.
There is the method for much distributing the motion picture compressed image information (for example above-mentioned information) of compressed coding via IP (Internet Protocol) network that uses grouping exchange method.Can predict, in future, the distribution of motion picture image will be developed evolution in following mobile communication system, in this mobile communication system, by PHS (personal handyphone system), portable phone or use these equipment to be connected to radio base station by radio channel as the travelling carriage that the portable terminal of communicator constitutes.
But, in mobile communication system, when travelling carriage exceeds a radio areas (sub-district) and moves to adjacent radio areas, handover (handover) can take place.Usually, monitored in travelling carriage by its incoming level of radio channel of realizing communication, and, handover drops to specified level when following when causing incoming level, hand-off request is sent to network side, and at network side, according to hand-off request, the base station before move, the connection destination of travelling carriage is switched to base station after moving from travelling carriage.
But in handover interim, Data Receiving is ended, thereby causes mass data to be lost, and the deterioration of the image that receives.In the coding method (especially as MPEG) of using inter prediction, do not experience data predicted and after handover is finished, be received, therefore the quality in reception period motion picture view data suffers severe exacerbation.This image disruption also can influence subsequent frame.
Can reduce because the mobile communication system of the loss of data that handover causes is suggested (with reference to JP-A-2000-152307 (being referred to as " patent documentation 1 " hereinafter)).This mobile communication system has a plurality of base stations that are connected to network and the travelling carriage that optionally is connected to these base stations via radio channel.When from the quality of reception of the radio signal of the base station of current connection owing to handover drops to specified level when following, travelling carriage sends the request of carrying out radio program to network.At network side, according to the execution request from travelling carriage, the communication information that is addressed to travelling carriage is broadcast to the base station that is currently connected to this travelling carriage and near other base stations the base station of current connection.Then the communication information by from the base station of current connection and nigh other base station broadcasts to travelling carriage.Utilize this broadcast transmitted, travelling carriage can obtain to be addressed to the communication information on it immediately after finishing handover, and therefore can reduce because the loss of data that handover caused.
Summary of the invention
Below explanation relates to the technical problem of prior art.
As described above described, there are the following problems: when the motion picture image is distributed to travelling carriage via the radio channel in the mobile communication system, cause the quality severe exacerbation of the image that receives in the loss of data of handover interim.
In patent documentation 1 described mobile communication system, travelling carriage can obtain to be addressed to the communication information on it immediately after finishing handover, therefore can reduce because the loss of data that handover caused.But, can't solve fully by the control wireless power in the loss of data of handover interim, therefore the broadcast transmitted of description can't be avoided this handover loss of data of interim that occurs in patent documentation 1.Therefore, can't provide solution completely to problem as patent documentation 1 described mobile communication system about the deterioration of image quality that receives.
The data that to lose resend travelling carriage can be counted as another kind of method.But this situation will cause receiving simultaneously two types data in travelling carriage: raw image data and retransmitting images data, and its result can add ambassador's Internet resources possibility that over-burden.
Therefore can be in image data communication system, view data discharge device, view data receiving equipment, image data communication method and program that the loss of data that is suppressed at handover interim under the Internet resources situation that over-burden is addressed the above problem thereby the object of the present invention is to provide.
To achieve these goals, image data communication system of the present invention comprises: the view data discharge device is used for a plurality of set that the order distribution has the identical motion picture view data of fixed time difference; And the view data receiving equipment, be used for when between a plurality of radio areas, moving, receive from the motion picture view data of described view data discharge device distribution; Wherein said view data receiving equipment is when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive described a plurality of set with identical motion picture view data of fixed time difference from described view data discharge device distribution, and from the motion picture view data that receives, select desired data, to rebuild a set of motion picture view data.
View data discharge device of the present invention is such view data discharge device, and this equipment is connected, and communicates by letter with the view data receiving equipment that moves between a plurality of radio areas by transmission line so that allow; Described view data discharge device comprises: coding back image data generating device, be used to generate a plurality of set of view data behind the identical coding, and in the view data, identical view data is encoded behind described identical coding; Coding back image data transmission apparatus is used for a plurality of set with time difference view data behind the identical coding that order transmission on the described transmission line has been generated by described coding back image data generating device of appointment; And control device, be used to carry out the specified control setting on the described transmission line, so that when betiding the handover of described view data receiving equipment in current wireless electricity zone moves to another adjacent radio areas, a plurality of being integrated into the appointed interval of view data is received in described view data receiving equipment behind the described identical coding with fixed time difference that described coding back image data transmission apparatus sends.
View data receiving equipment of the present invention is such view data receiving equipment, this equipment is connected, communicate by letter with the view data discharge device by transmission line so that allow, this view data discharge device is distributed a plurality of set of view data behind the identical coding in proper order with the time difference of appointment, in the view data, identical view data is encoded behind described identical coding; Described view data receiving equipment comprises: coding back image data reception device, be used for when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive a plurality of set that have view data behind the identical coding of fixed time difference from described view data discharge device distribution described; And the data reconstructing device, be used for from behind the described identical coding with fixed time difference that described appointed interval receives, selecting desired data a plurality of set of view data, to rebuild a set of coding back view data.
Image data communication method of the present invention is a kind of image data communication method of carrying out in communication system, and in described communication system, view data discharge device and view data receiving equipment are connected by transmission line, so that allow communication; Described image data communication method comprises: first step, and in this step, a plurality of set that described view data discharge device will have the identical motion picture view data of fixed time difference are distributed to described view data receiving equipment in proper order; And second step, in this step, described view data receiving equipment is when betiding the handover of described view data receiving equipment in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive described a plurality of set with identical motion picture view data of fixed time difference from described view data discharge device distribution, and from the motion picture view data that receives, select desired data, to rebuild a set of motion picture view data.
First program of the present invention is a kind of program of using in communication system, in described communication system, server and client terminal are connected by transmission line, so that allow communication, described program causes the computer of described server to carry out first process, and a plurality of set that this process is used for having the identical motion picture view data of fixed time difference are distributed to described client terminal in proper order; And the computer that causes described client terminal is carried out second process, this process is used for when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive described a plurality of set with identical motion picture view data of fixed time difference, and from the motion picture view data that receives, select desired data, to rebuild a set of motion picture view data.
Second program of the present invention is a kind of program of using in server, described server is connected, communicate by letter with the client terminal that between a plurality of radio areas, moves by transmission line so that allow, described second program causes the computer in the described server to be carried out: first process, be used to generate a plurality of set of view data behind the identical coding, in the view data, identical view data is encoded behind described identical coding; Second process is used for sending a plurality of set of view data behind the identical coding that described first process generates with the time difference of appointment in order on the described transmission line; And the 3rd process, be used for when betiding the handover of described client terminal in current wireless electricity zone moves to another adjacent radio areas, carry out the specified control setting on the described transmission line, so that a plurality of being integrated in the appointed interval of view data is received behind the described identical coding with fixed time difference that sends in described client terminal in described second process.
The 3rd program of the present invention is a kind of program of using in client terminal, described client terminal is connected, so that allow by transmission line and server communication, described server figure distributes a plurality of set of view data behind the identical coding with fixed time difference order, in the view data, identical image is encoded behind described identical coding; Described program causes the computer of described client terminal to carry out following process: when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, receive a plurality of set that have view data behind the identical coding of fixed time difference from described server distribution described in appointed interval; And behind the described identical coding with fixed time difference that described appointed interval, has received, select desired data in a plurality of set of view data, to rebuild a set of coding back view data.
In image data communication system of the present invention, view data discharge device, view data receiving equipment, image data communication method and program, have in the appointed interval of a plurality of set (a plurality of set of view data behind the perhaps identical coding) when handover of identical motion picture view data of fixed time difference and be received according to foregoing description.Then, the described middle set selecting desired data to rebuild motion picture view data (or coding back view data) of a plurality of set (a plurality of set of view data behind the perhaps identical coding) from appointed interval, having received with identical motion picture view data of fixed time difference.Below this reconstruction will be described more specifically.
As a plurality of set of identical motion picture view data, can consider two set A and the B of motion picture view data with fixed time difference.Motion picture view data A by n frame A1, A2 ..., A (n-1), An constitute; These frames are sent in this order in proper order.Motion picture view data B by n frame B1, B2 ..., B (n-1), Bn constitute; These frames are sent in this order in proper order, but suppose that the transmission of this motion picture view data B is delayed 5 frames with respect to motion picture view data A.Given these conditions, in the frame A11-A21 of motion picture view data A received interim fixed time, the frame B5-B15 of motion picture view data B is received.If at the appointed time interim, three frame A12-A14 of motion picture view data A are owing to losing at interval with handover, then three of motion picture view data B frame B6-B9 also will lose.So, at the appointed time interim, frame A1 and the A15-A21 of motion picture view data A are received, and frame B5 and the B10-B15 of motion picture view data B are received.In the case, three frame B12-B14 are corresponding with three frame A12-A14 that lost in handover interim, and the frame of losing of motion picture view data A can be compensated by these three frame B12-B14.By carry out rebuilding by this way, the frame of losing in handover interim is compensated.
Here, above-mentioned motion picture view data A and B are made of m image data packets: promptly image data packets A1, A2 ..., A (m-1), Am and image data packets B1, B2 ..., B (m-1), Bm, wherein the identical point of the same number of frames of motion picture view data is encoded.In the following description, above-mentioned frame can be an image data packets.
In above-mentioned reconstruction, only in appointed interval, need motion picture view data B, and do not need under normal conditions.Therefore, can carry out control,,, then not receive motion picture view data B if Internet resources are not enough so that during normal running.
According to the invention described above, the data of losing can compensate by rebuilding, and irrelevant with the generation of handover, and therefore deterioration of image can be suppressed to bottom line.
In addition,, therefore can eliminate demand, and therefore any growth of the required amount of calculation of decoding can be suppressed to floor level a plurality of set of decode image data because the data that receive are decoded after above-mentioned reconstruction.
In addition, the elimination for the not enough reason of Internet resources can provide stable view data communication.
Description of drawings
The block diagram of Fig. 1 shows the illustrative arrangement as the image data communication system of the present invention's first work example;
The schematic diagram of Fig. 2 has illustrated when carrying out handover in image data communication system shown in Figure 1, the actual example of the reconstruction of view data;
The block diagram of Fig. 3 shows the illustrative arrangement as the image data communication system of the present invention's second work example;
The schematic diagram of Fig. 4 has illustrated when carrying out handover in image data communication system shown in Figure 3, the actual example of the reconstruction of view data;
The schematic diagram of Fig. 5 has illustrated when carrying out handover in the image data communication system as the present invention's the 3rd work example, the actual example of the reconstruction of view data;
The schematic diagram of Fig. 6 has illustrated when carrying out handover in as the image data communication system of the present invention's the 3rd example, the actual example of the reconstruction of view data;
The block diagram of Fig. 7 shows the illustrative arrangement as the image data communication system of the present invention's the 5th work example;
The schematic diagram of Fig. 8 has illustrated when carrying out handover in image data communication system shown in Figure 7, the actual example of the reconstruction of view data; And
The block diagram of Fig. 9 shows the illustrative arrangement as the image data communication system of the present invention's the 6th work example.
Embodiment
Relate to embodiments of the invention below with reference to the description of the drawings.
Primary clustering as the image data communication system of the embodiment of the invention comprises view data discharge device and view data receiving equipment, and described view data receiving equipment is the mobile communication terminal (client terminal) that is connected to the view data discharge device by mobile communications network at least.The view data discharge device sends a plurality of set of the same motion picture view data with fixed time difference to the view data receiving equipment.The view data receiving equipment is at least when handover, in the interval of appointment, receive described a plurality of set, and from the motion picture view data that these have received, select data necessary to rebuild a set of motion picture view data with same motion picture view data of fixed time difference from the view data discharge device.By this reconstruction, the view data of losing in handoff time interim can be compensated.
Below explanation relates to the work example 1-6 according to the actual configuration of image data communication system of the present invention.
Work example 1
Fig. 1 shows the illustrative arrangement as the image data communication system of the present invention's first work example.In this image data communication system, view data discharge device 101 and view data receiving equipment 107 link together, so that allow to communicate by transmission line 106, IP network is structured on the Radio Physics layer in this transmission line 106.
View data discharge device 101 uses UDP (the datagram protocol)/IP as an Internet Standard agreement to distribute encoded image data to view data receiving equipment 107, and view data discharge device 101 is made of following assembly: control information processor 102, image data storage/generation unit 103 and coding back view data transmitter 104 and 105.
103 pairs of view data of storing in advance of image data storage/generation unit are encoded, and perhaps the view data that provides in real time from the outside are encoded, and generate coding back view data 1 and 2. View data 1 and 2 is provided to coding back view data transmitter 104 and 105 respectively behind these codings that generated.Coding back view data 1 and 2 is through the set of data behind the same coding of efficient compression, and described efficient compression is representative with the mpeg standard.
View data 1 and 2 sends on the transmission line 106 behind coding back view data transmitter 104 and 105 codings that will provide from image data storage/generation unit 103 in the different sessions separately with fixed time difference.In the present embodiment, given the time difference so that the transmission that comes view data 2 behind the coding of view data transmitter 105 after the own coding with respect to the coding that comes view data transmitter 104 after the own coding after the transmission of view data 1 be delayed designated time intervals.Here, the time difference of appointment is the time difference that is used for realizing rebuilding (will describe hereinafter).In the case, in the coding back view data transmitter 104 and 105 each all has to the ability of encoded image data interpolation with RTP (RTP) information corresponding (for example RTP head), so that allow from the data that receive, to select data necessary, and allow the order of swap data when view data receiving equipment 107 receives the set of coding back view data 1 and 2 and data reconstruction.
During normal running, control information processor 102 is provided with route priority and/or the power control on the wireless radio transmission circuit, so that coding back view data 1 is preferentially received in view data receiving equipment 107; But when handover, promptly from receiving during handover from view data receiving equipment 107 begins to notify the time interval that receives between the handover end notification, control information processor 102 with the route priority on the wireless radio transmission circuit and/or power control setting for making coding back view data 1 and 2 all in view data receiving equipment 107, be received.Can use existing method in the process of route priority on this set wireless radio transmission circuit and power control.
View data receiving equipment 107 is the client terminals that are connected to the radio IP network, and its configuration comprises control information processor 108, coding back viewdata receiver 109 and 110, coding back data buffering/reconstruction unit 111 and decoder 112.
Coding back viewdata receiver 109 receives view data 1 behind the coding that sends from the back view data transmitter 104 of encoding, and provides incoming level to control information processor 108.Coding back viewdata receiver 110 receives view data 2 behind the coding that sends from the back view data transmitter 105 of encoding, and provides incoming level to control information processor 108.Utilize coding back viewdata receiver 109 and 110, view data is provided to coding back data buffering/reconstruction unit 111 behind the coding that receives.
During normal running, data were provided to decoder 112 after coding back data buffering/reconstruction unit 111 only will be received from the motion picture image encoding of coding back viewdata receiver 109.But, when coding back view data 1 and 2 all is received in the viewdata receiver 109 and 110 behind coding, coding back data buffering/reconstruction unit 111 is selected data necessary the view data 1 and 2 based on the compression degree of the function that for example is equal to RTP, the session that receives and view data behind the coding that receives, a set of the data reconstructed image data that use is selected, and the view data that will rebuild is provided to decoder 112.Therefore,, have only a set of view data decoded, thereby the burden on the decode procedure of decoder 112 does not increase even when view data 1 and 2 all is received behind coding yet.Decoder 112 is to be used for known equipment that view data 1 and 2 behind the coding that is received from view data discharge device 101 is decoded.
The concrete example of the operation of the image data communication system that relates to this work example below is described.
Normal running at first is described, i.e. operation during view data receiving equipment 107 moves in single radio zone (sub-district).In view data discharge device 101, coding back view data transmitter 104 sends coding back view data 1, and coding back view data transmitter 105 sends coding back view data 2, this coding back view data 2 is identical with coding back view data 1, but has been delayed the fixed time at interval with respect to the transmission of coding back view data 1.
During view data after the transfer encoding 1 and 2, control information processor 102 is carried out and is provided with, so that view data 1 is routed on transmission line 106 with the priority that is higher than coding back view data 2 behind the coding, and/or view data 1 is sent out on the wireless radio transmission circuit of transmission line 106 with the power that is higher than coding back view data 2 behind the feasible coding.By carrying out these settings, when the resource of transmission line 106 is not enough, preferentially send coding back view data 1, and coding back view data 2 is dropped on transmission line 106 to view data receiving equipment 107, suppress thus since on the transmission line 106 excessive flow caused overflows.
In view data receiving equipment 107, on the bottom line, coding back view data 1 is received in the viewdata receiver 109 behind coding.View data 1 is temporarily stored behind coding in data buffering/reconstruction unit 111 behind these codings that receive, and is provided to decoder 112 subsequently and at decoder 112 places experience decode procedure.
The below operation of explanation when relating to handover promptly moves to the operation of another neighboring radio when regional view data 1 time when view data receiving equipment 107 from current wireless electricity zone behind received code.
When view data receiving equipment 107 moved away the base station in current wireless electricity zone, the incoming level of coding back view data 1 descended.Control information processor 108 drops to specified level when following at the incoming level of view data 1 behind the back coding that provides of viewdata receiver 109 of encoding, and sends handovers to view data discharge device 101 and begins notice.
When in view data discharge device 101, receive handover begin the notice after, control information processor 102 all is received route priority on the wireless radio transmission circuit and/or power control setting for feasible coding back view data 1 and 2 in view data receiving equipment 107, after the transmission handover began notice, view data 1 and 2 was received in view data receiving equipment 107 with the fixed time difference behind the identical coding thus.
When the distance to the base station in current wireless electricity zone further increased, view data 1 and 2 incoming level descended manyly behind the coding in the view data receiving equipment 107, lose up to reception.Time point when coding back view data 1 and 2 reception are lost is a handover starting point at interval.On the other hand, along with view data receiving equipment 107 is approaching as the base station in another radio areas of mobile destination, view data 1 and 2 incoming level increase gradually behind the coding in the view data receiving equipment 107, and the reception up to coding back view data 1 and 2 becomes possibility.2 of view data 1 reception becomes the end point that possible time point is the handover interval behind the coding.In handover interim, in view data receiving equipment 107 coding back view data 1 and 2 reception all become impossible, so loss of data.
When the reception of coding back view data 1 and 2 become may and the incoming level of coding back view data 1 and 2 when surpassing specified level, control information processor 108 in the view data receiving equipment 107 the moment that surpasses predetermined level from incoming level through one period fixed time at interval after, the handover end notification is sent to view data discharge device 101.
During the appointed interval after handover finishes at interval, coding back view data 1 and 2 all is received in view data receiving equipment 107.The data of losing in handover interim of coding back view data 1 all or part of is comprised in behind the coding that receives during this appointed interval in the view data 2.Coding back data buffering/reconstruction unit 111 is selected the corresponding data of obliterated data with coding back view data 1 view data 2 behind the coding that receives, and correctly sort a set of reconstructed image data by view data 1 behind data that this is selected and the coding that has received.Utilize this reconstruction, all or part of of obliterated data of coding back view data 1 compensated.The view data of these reconstructions is provided to decoder 112 and decoded at decoder 112 places.
After above-mentioned appointed interval, in view data discharge device 101, receive the handover end notification.Control information processor 102 is carried out and is provided with then, so that coding back view data 1 to be being routed on transmission line 106 than coding back view data 2 higher priority, and/or make coding back view data 1 on the wireless radio transmission circuit of transmission line 106, to be transmitted than coding back view data 2 higher power.By these settings, in view data receiving equipment 107, realized and identical operations during above-mentioned normal running.
Fig. 2 shows the actual example of the reconstruction of view data when above-mentioned handover.The 7th frame, the 8th frame ..., the data of the 30th frame are sent out in this order as coding back view data 1, the 1st frame, the 2nd frame ..., the data of the 24th frame are sent out in this order as coding back view data 2, have the time difference of 6 frames between these coding back view data 1 and 2.In the view data 1,7-14 frame and 25-30 frame (frame shown in boldface letter) are the parts that is set to high priority behind coding, and 15-24 frame (frame shown in light face) is to be set to the lower part of priority.In the view data 2,1-8 frame and 19-24 frame (frame shown in small character) are the frames that is set to low priority behind coding, and 9-18 frame (frame shown in the character of band underscore) is the part that has been set to normal priority.
In the example of Fig. 2, send handovers to view data discharge device 101 during the 14th frame of view data receiving equipment 107 view data 1 behind received code and begin notice, and behind received code, send the handover end notification to view data discharge device 101 during the 24th frame of view data 1.Before view data receiving equipment 107 transmission handovers begin notice, the high priority data of the 7-14 frame of coding back view data 1 is received, and after having sent the handover end notification, the high priority data of the 25-30 frame of coding back view data 1 is received.
In view data discharge device 101, priority and/or power control are provided so that and are beginning to notify the interval that receives between the handover end notification from receiving handover that coding back view data 1 and 2 all is received in view data receiving equipment 107.Therefore, sent handover begin the notice after, for the priority of coding back view data 1 reduction since the 15th frame, and since the 9th frame normal priority is set for coding back view data 2, begin and from the 9th frame of the back view data 2 of encoding, these two set of coding back view data all are received in view data receiving equipment 107 from the 15th frame of the back view data 1 of encoding thus.
Between the 10-14 frame of the 16-20 frame of coding back view data 1 and coding back view data 2 is the handover interval at interval, and in this handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 107.Therefore, in this handover interim, for the loss of data of coding back view data 1, the 16 frame to the 20 frames, and for the loss of data of coding back view data 2, the 10 frames to the 14 frames.
After handover finishes at interval and before the handover end notification, from encode the back view data 1 the 21st frame begin and from encode the back view data 2 the 15th frame, data are received in order in view data receiving equipment 107.So, in the interim that begins from handover to notify between the handover end notification, the 15th frame of coding back view data 1 and the data of 21-24 frame and the 9th frame of coding back view data 2 and the data of 15-18 frame all are received in view data receiving equipment 107.Then, the reconstruction of carries out image data the 15th frame to the 18 frames of the 21st frame to the 24 frames of view data 1 and coding back view data 2 behind the coding that has received.Therefore, in the 16th frame to the 20 frames of losing in handover interim of coding back view data 1, the 16th frame to the 18 frames of losing are compensated.
Work example 2
Fig. 3 shows the exemplary configuration as the image data communication system of the present invention's second work example.In this image data communication system, view data discharge device 301 and view data receiving equipment 307 are connected, so that allow them to communicate with one another by transmission line 306, IP network is structured on the Radio Physics layer in this transmission line 306.
View data discharge device 301 uses UDP/IP that encoded image data is distributed to view data receiving equipment 307, and view data discharge device 301 has following configuration: it comprises receiving state report receiver 302, image data storage/generation unit 303 and coding back view data transmitter 304 and 305.Image data storage/generation unit 303 and coding back view data transmitter 304 are basic identical with 305 view data transmitters 104 and 105 with image data storage/generation unit 103 shown in Figure 1 and after encoding.
Receiving state report receiver 302 is based on beginning and the end of determining handover in the view data receiving equipment 307 from the receiving state report of view data receiving equipment 307.In addition, receiving state report receiver 302 with the route priority on the wireless radio transmission circuit and/or power control setting for make during the normal running in view data receiving equipment 307 view data 1 behind the preferential received code, and with the route priority on the wireless radio transmission circuit and/or power control setting for making when the handover, promptly beginning from handover to the interim finishing, coding back view data 1 and 2 all is received in view data receiving equipment 307.Can use known method in the process of route priority on this set wireless radio transmission circuit and power control.
View data receiving equipment 307 is the client terminals that are connected to the radio IP network, and has following configuration: it comprises receiving state report transmitter 308, coding back viewdata receiver 309 and 310, coding back data buffering/reconstruction unit 311 and decoder 312.Data buffering/reconstruction unit 111 and decoder 112 are basic identical behind coding back data buffering/reconstruction unit 311 and decoder 312 and the coding shown in Figure 1.
Coding back viewdata receiver 309 receives view data 1 behind the coding that sends from the back view data transmitter 304 of encoding, and coding back viewdata receiver 310 receives view data 2 behind the coding that sends from the back view data transmitter 305 of encoding.View data 1 and 2 is provided to coding back data buffering/reconstruction unit 311 behind the coding that is received by coding back viewdata receiver 309 and 310.
Receiving state report transmitter 308: for view data 1 behind the coding that is received from coding back viewdata receiver 309 and 310 respectively and 2 is collected the RR (receiver report) of RTCP (RTP Control Protocol) or is equal to the information of these reports, and this information is to collect based on spacing (spacing), the constant spacing of RTCP standard or the spacing (shorten when changing big time interval, less time interval is elongated when changing) of change degree of information of depending on over; From the information of collecting, derive the statistic such as losing the factor; And this information sent to view data discharge device 301 as receiving state report.
Below explanation relates to the practical operation of the image data communication system of this work example.
Normal running at first is described, the operation during promptly view data receiving equipment 307 moves in single radio zone (sub-district).When coding back view data 1 and 2 is sent out during normal running, receiving state report receiver 302 with the route priority on the wireless radio transmission circuit and/or power control setting for making in view data receiving equipment 307 preferentially view data 1 behind the received code.By this set, when the resource of transmission line 306 was not enough, coding back view data 1 preferentially arrived in view data receiving equipment 307, and coding back view data 2 is dropped on transmission line 306.So, suppressed because overflowing on the caused transmission line 306 of excessive flow.
In view data receiving equipment 307, coding back view data 1 is received in the viewdata receiver 309 behind coding at least.View data 1 is temporarily stored behind coding and in data buffering/reconstruction unit 311, is provided to decoder 312 subsequently behind these codings that receive, and coding back data are in the experience decoding of decoder 312 places.
Ensuing explanation relates to the operation when handover, promptly when view data receiving equipment 307 operation when current wireless electricity zone moves to another neighboring radio zone view data time the behind received code.
Along with the distance to the base station in current wireless electricity zone increases, the accepting state of coding back view data 1 in view data receiving equipment 307 worsens, and loses the factor and increase.When losing the factor when increasing, surpass designated value as the statistical value of losing the factor from view data 1 behind the coding of the receiving state report of receiving state report transmitter 308.
When the statistical value of losing the factor of coding back view data 1 surpasses designated value, receiving state report receiver 302 in the view data discharge device 301 determines that handover begins, and route priority on the wireless radio transmission circuit and/or power control setting all are received in view data receiving equipment 307 for feasible coding back view data 1 and 2.More specifically, receiving state report receiver 302 is carried out and is provided with, to reduce route priority and/or the through-put power of coding back view data 1 on transmission line, and route priority and/or the through-put power of raising coding back view data 2 on transmission line, thus after handover begins, have the identical coding of fixed time difference after view data 1 and 2 all in view data receiving equipment 307, be received.
Along with the further increase of the distance that arrives the regional base station of current wireless electricity, the accepting state of coding back view data 1 and 2 in view data receiving equipment 307 further worsens, and it is impossible to become up to reception.Reception in view data behind the coding 1 and 2 becomes that handover begins at interval on impossible time point.Along with view data receiving equipment 307 is approaching as the base station in another radio areas of mobile destination, the coding back accepting state of view data 1 and 2 in view data receiving equipment 307 improved gradually, finally makes it possible to view data 1 and 2 behind the received code.It is handover end point at interval that coding back view data 1 and 2 reception become possible time point.In handover interim, coding back view data 1 and 2 all can't be received and loss of data in view data receiving equipment 307.
When the reception of coding back view data 1 and 2 become may the time, drop to below the designated value as the statistical value of losing the factor from view data 1 behind the coding of the receiving state report of receiving state report transmitter 308 and 2.In view data discharge device 301, receiving state report receiver 302 is after the process fixed time moment under statistical value drops to designated value interval, determine that handover finishes, and make route priority and/or power control on the wireless radio transmission circuit return normal setting, so that coding back view data 1 is preferentially received in view data receiving equipment 307.
During the appointed interval after handover finishes at interval, coding back view data 1 and 2 all is received in view data receiving equipment 307.View data 2 has comprised the data of losing in handover interim all or part of of coding back view data 1 behind the coding that receives during this appointed interval.Coding back data buffering/reconstruction unit 311 is selected the corresponding data of obliterated data with coding back view data 1 view data 2 behind the coding that receives, and view data 1 behind the data selected and the coding that receives correctly sorted, with a set of reconstructed image data.Utilize this reconstruction, all or part of of obliterated data of coding back view data 1 compensated.The view data of Chong Jianing is provided to decoder 312 and decoded at decoder 312 places by this way.
After above-mentioned appointed interval, the above-mentioned normal running identical operations in execution and the view data receiving equipment.
Fig. 4 shows the actual example of the reconstruction of view data when above-mentioned handover.The 7th frame, the 8th frame ..., the data of the 30th frame are sent out in order as coding back view data 1, the 1st frame, the 2nd frame ..., the data of the 24th frame are sent out in order as coding back view data 2, have the time difference of 6 frames between view data behind the coding 1 and 2.In the view data 1,7-14 frame and 27-30 frame (frame shown in boldface letter) are the parts that is set to high priority behind coding, and 15-26 frame (frame shown in light face) is that priority is set to lower part.In the view data 2,1-8 frame and 21-24 frame (part shown in small characters) are the frames that is set to low priority behind coding, and 9-20 frame (frame shown in the character of band underscore) is the part that is set to normal priority.
In the example of Fig. 4, view data receiving equipment 307 sends receiving state report every 6 frames to view data discharge device 301.Determine that handover begins during the 14th frame of view data receiving equipment 301 view data 1 behind received code, and behind received code, determine that handover finishes during the 26th frame of view data 1.In view data receiving equipment 307, before handover began, the high priority data of the 7-14 frame of coding back view data 1 was received, and after handover finished, the high priority data of the 27-30 frame of coding back view data 1 was received.
In the interim that begins from handover to play between the handover end, the setting of priority and/or power control is performed, so that coding back view data 1 and 2 all is received in view data receiving equipment 307.Therefore, after handover begins, reduce priority for the back view data 1 of coding since the 15th frame, and view data 2 is normal since the 9th frame priority for encoding afterwards.So, from encode the back view data 1 the 15th frame begin and from encode the back view data 2 the 9th frame, two set of view data all are received in view data receiving equipment 307.
The interval of the 16th frame to the 20 frames of coding back view data 1 (the 10th frame to the 14 frames of coding back view data 2) is in the handover interval, and in this handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 307.Therefore, in this handover interim, the loss of data of the 16th frame to the 20 frames of coding back view data 1, and the loss of data of the 10th frame to the 14 frames of coding back view data 2.
Interim after handover finishes at interval between handover finishes, from the 21st frame of the back view data 1 of encoding and from the 15th frame of the back view data 2 of encoding, coding back view data 1 and 2 is received in order in view data receiving equipment 307.So, beginning from handover to the interim finishing, the 15th frame of coding back view data 1 and the data of 21-26 frame and the 9th frame of coding back view data 2 and the data of 15-20 frame all are received in view data receiving equipment 307.The reconstruction of carries out image data the 15-20 frame of the 21-26 frame of view data 1 and coding back view data 2 behind the coding that has received then, the be encoded 16-20 frame of back view data 2 of the 16-20 frame of losing in handover interim of coding back view data 1 compensates thus.
Work example 3
The image data communication system of this work example has the configuration identical with the system of Fig. 1, but the part operation difference is arranged.More specifically, the difference of the operation of this work example and the system of Fig. 1 is, in view data discharge device 101, coding back view data 2 following of the control of control information processor 102 during at handover from back view data transmitter 105 transmissions of encoding.Other operations are all identical with the operation of the system of Fig. 1.
Below explanation relates to the practical operation of the image data communication system of this work example.
Usually, in view data discharge device 101, coding back view data 1 is sent out from the back view data transmitter 104 of encoding, but coding back view data 2 is not sent out from the back view data transmitter 105 of encoding.In view data receiving equipment 107, have only coding back view data 1 behind coding, to be received in the viewdata receiver 109.View data 1 is temporarily stored behind coding and in data buffering/reconstruction unit 111, is provided to decoder 112 subsequently behind these codings that receive, and data are at decoder 112 places experience decode procedure.
Operation when below explanation relates to handover.
In view data receiving equipment 107, along with the distance to the regional base station of current wireless electricity increases, the incoming level decline of coding back view data 1.When the incoming level of view data 1 behind the back coding that provides of viewdata receiver 109 of encoding drops to specified level when following, control information processor 108 sends handovers to view data discharge device 101 and begins notice.Replacing this handover begins notice or begins notice with this handover, control information processor 108 can be submitted request to view data discharge device 101, so that coding back view data 1 is switched to view data behind the coding with low bit rate, and the distribution of coding back view data 2 begins.In the case, control information processor 108 can be submitted the request for the control of the power on the wireless radio transmission circuit of resetting priority route on the transmission line 106 and/or transmission line 106 to.
In view data discharge device 101, begin notice (and/or for changing to low bit rate and beginning to distribute the request of coding back view data 2) afterwards receiving handover, view data 1 switch to and have than view data behind the coding of low bit rate behind the coding that control information processor 102 will send from the back view data transmitter 104 of encoding, and cause coding back view data transmitter 105 to send coding back view data 2.At this moment, control information processor 102 can also be reset the power control on the wireless radio transmission circuit of priority route on the transmission line 106 or transmission line 106, so that coding back view data 1 and 2 all is received in view data receiving equipment 107.
Along with the distance to the regional base station of current wireless electricity further increases, the incoming level of coding back view data 1 and 2 in view data receiving equipment 107 further descends, and finally loses up to receiving.Reception in view data behind the coding 1 and 2 becomes that handover begins at interval on impossible time point.Along with view data receiving equipment 107 is approaching as the base station in another radio areas of mobile destination, the incoming level of coding back view data 1 and 2 in view data receiving equipment 107 increases gradually, and the reception up to coding back view data 1 and 2 finally becomes possibility.It is handover end point at interval that coding back view data 1 and 2 reception become this possible time point.In handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 107, and therefore loss of data.
During the appointed interval after finishing the handover interval, coding back view data 1 and 2 all is received in view data receiving equipment 107.View data 2 comprises the data of losing in handover interim all or part of of coding back view data 1 behind the coding that receives during this appointed interval.Coding back data buffering/reconstruction unit 111 is selected the corresponding data of obliterated data with coding back view data 1 view data 2 behind the coding that has received, and view data 1 behind these data selected and the coding that received is correctly sorted, with a set of reconstructed image data.Rebuild by this, all or part of of obliterated data of coding back view data 1 compensated.The view data of Chong Jianing is provided to decoder 112 subsequently by this way, and in the experience decoding of decoder 112 places.
After above-mentioned appointed interval, handover end notification (and/or for changing to normal bit rate and ending the request of distribution coding back view data 2) is received in view data discharge device 101.Then, view data 1 switches to view data behind the coding with normal bit rate behind the coding with low bit rate that control information processor 102 will send from the back view data transmitter 104 of encoding, and end the distribution of view data 2 behind the coding of view data transmitter 104 after the own coding, be performed with above-mentioned normal running identical operations thus.
Fig. 5 shows the actual example of the reconstruction of view data when above-mentioned handover.The 7th frame, the 8th frame ..., the data of the 30th frame are sent out in order as coding back view data 1, and when handover, the 9th frame, the 10th frame ..., the data of the 22nd frame are sent out with coding back view data 1 in order as coding back view data 2.The time difference that between these coding back view data 1 and 2, has 6 frames.In the view data 1,7-14 frame and 25-30 frame (part shown in boldface letter) are set to be sent out with normal bit rate behind coding; And 15-24 frame (part shown in light face) is the part that is set to the low bit rate transmission.In the view data 2,9-22 frame (part shown in light face) is the part that is set to the low bit rate transmission behind coding.
In the example of Fig. 5, send handovers to view data discharge device 101 during the 14th frame of view data receiving equipment 107 view data 1 behind received code and begin notice, and/or for changing to low bit rate and beginning to distribute the coding request (abbreviating " handover begins notice/request " hereinafter as) of view data 2 afterwards, and behind received code during the 24th frame of view data 1, send the handover end notification to view data discharge device 101, and/or for changing to normal bit rate and ending the request (abbreviating " handover end notification/request " hereinafter as) of distribution coding back view data 2.
In view data receiving equipment 107, the data of the 7-14 frame of coding back view data 1 were received before the transmission handover begins notice/request, and the data of the 29-30 frame of coding back view data 1 are received after sending handover end notification/request.
Beginning to notify/ask in the interval that receives between handover end notification/request from view data discharge device 101, receiving handover, begin to carry out transmission from the 15th frame of the back view data 1 of encoding, and begin to carry out in proper order to send from the 9th frame of the back view data 2 of encoding with the low bit rate order.Therefore, from the 15th frame of the back view data 1 of encoding and from the 9th frame of view data 2 afterwards of encoding, in view data receiving equipment 107, receive these two set of view data.
From the 16th frame to the 20 frames of the back view data 1 of encoding and from the 10th frame to the 14 frames of the back view data 2 of encoding be at interval handover at interval, and in this handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 107.Therefore, in this handover interim, for coding back view data 1, from the loss of data of the 16th frame to the 20 frames, for coding back view data 2, from the loss of data of the 10th frame to the 14 frames.
After handover finishes at interval and the interim before the handover end notification, begin and view data receiving equipment 107, be received in order from the data that the 15th frame of the back view data 2 of encoding begins from the 21st frame of the back view data 1 of encoding.Therefore, in the interim that begins from handover to notify between the handover end notification, the 15th frame of coding back view data 1 and the data of 21-28 frame and the 9th frame of coding back view data 2 and the data of 15-22 frame all are received in view data receiving equipment 107.Then, behind the coding that these have received, select the 15-28 frame the view data, and these frames are arranged as correct order with reconstructed image data.So, the 16th frame to the 20 frames of losing in handover interim of coding back view data 1 are compensated.
Work example 4
The image data communication system of this work example has the configuration identical with the system of Fig. 3, but the part operation difference is arranged.More specifically, the difference of the operation of this work example and the system of Fig. 3 is, in view data discharge device 301, under control, 2 of coding back view data are sent out from the back view data transmitter 305 of encoding when handover at receiving state report receiver 302.Other operations are all basic identical with the operation of the system of Fig. 3.
The actual example of the operation of the image data communication system that relates to this work example below is described.
During normal running, be sent out in the view data transmitter 304 behind the coding of coding back view data 1 from view data discharge device 301, but coding back view data 2 is not sent out from the back view data transmitter 305 of encoding.Behind the coding of view data receiving equipment 307, have only coding back view data 1 to be received in the viewdata receiver 309.View data 1 is temporarily stored behind coding and in data buffering/reconstruction unit 311, is provided to decoder 312 subsequently behind these codings that receive, and decoded at decoder 312 places.
Below explanation relates to the operation when handover.
Along with the distance to the base station in current wireless electricity zone increases, the accepting state of coding back view data 1 in view data receiving equipment 307 worsens, and loses the factor and increase.Arrive when high-level when losing the factor, surpass designated value as the statistical value of losing the factor from view data 1 behind the coding of the receiving state report of receiving state report transmitter 308.
When the statistical value of losing the factor of coding back view data 1 drops to designated value when following, receiving state report receiver 302 in the view data discharge device 301 determines that handover begins, and view data 1 switch to and have than view data behind the coding of low bit rate behind the coding that will send from the back view data transmitter 304 of encoding, and cause coding back view data 2 from the back view data transmitter 305 of encoding, to be sent out.At this moment, receiving state report receiver 302 can also be carried out the control of the power on the wireless radio transmission circuit of priority route on the transmission line 306 and/or transmission line 306 and reset, so that coding back view data 1 and 2 all is received in view data receiving equipment 307, thus after handover begins, have the identical coding of fixed time difference after view data 1 and 2 all in view data receiving equipment 307, be received.
Along with the distance to the regional base station of current wireless electricity further increases, the accepting state of coding back view data 1 and 2 in view data receiving equipment 307 further worsens, and it is impossible to become up to reception.It is handover starting point at interval that coding back view data 1 and 2 reception become impossible time point.On the other hand, along with view data receiving equipment 307 is approaching as the base station in another radio areas of mobile destination, the accepting state of coding back view data 1 and 2 in view data receiving equipment 307 improved gradually, and the reception up to final coding back view data 1 and 2 becomes possibility.It is handover end point at interval that coding back view data 1 and 2 reception become possible time point.In handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 307, so loss of data.
When the reception of coding back view data 1 and 2 become may the time, drop to below the designated value as the statistical value of losing the factor from view data 1 behind the coding of the receiving state report of receiving state report transmitter 308 and 2.Receiving state report receiver 302 in the view data discharge device 301 determines that handover finishes after process fixed time in the moment interval that drops to from this statistical value below the designated value, and view data 1 switches to normal bit rate from low bit rate behind the coding that subsequently will be just sends from the back view data transmitter 304 of encoding, and ends to send coding back view data 2 from the back view data transmitter 305 of encoding.At this moment, if determining that handover has changed route priority and/or the control of the through-put power on the wireless radio transmission circuit on the transmission line 306 when beginning, then receiving state report transmitter 308 turns back to these settings the state (reset condition) of normal running.
During the appointed interval after handover finishes at interval, coding back view data 1 and 2 all is received in view data receiving equipment 307.View data 2 comprises the data of losing in handover interim all or part of of coding back view data 1 behind the coding that receives during this appointed interval.Coding back data buffering/reconstruction unit 311 is selected the corresponding data of obliterated data with coding back view data 1 view data 2 behind the coding that receives, and correct arrange view data 1 after data of selecting and the coding that has received, with a set of reconstructed image data.Rebuild by this, all or part of of obliterated data of coding back view data 1 compensated.The view data of having utilized this mode to rebuild is provided to decoder 312, and decoded at decoder 312 places.
After above-mentioned appointed interval, carry out and above-mentioned normal running identical operations.
Fig. 6 shows the actual example of the reconstruction of view data when above-mentioned handover.As coding back view data 1, the 7 frame, the 8th frame ..., the data of the 30th frame are sent in proper order.When handover, the 7th frame, the 8th frame ..., the data of the 22nd frame are sent with coding back view data 1 in proper order as coding back view data 2, have the time difference of 6 frames between these coding back view data 1 and 2.In the view data 1,7-12 frame and 29-30 frame (with the part of boldface letter indication) are set to send with normal bit rate behind coding, and 13-28 frame (with the part of light face indication) is the part that is set to than the low bit rate transmission.In the view data 2,7-22 frame (with the part of light face indication) is the part that is set to the low bit rate transmission behind coding.
In the example of Fig. 6, view data receiving equipment 307 sends receiving state report every 6 frames to view data discharge device 301.Determine that handover begins during the 12nd frame of view data discharge device 301 view data 1 behind received code, and behind received code, determine that handover finishes during the 28th frame of view data 1.In view data receiving equipment 307, the data of the 7-12 frame of coding back view data 1 were received with normal bit rate before handover begins, and the data of the 29-30 frame of coding back view data 1 are received with normal bit rate after handover finishes.
Beginning from handover to the interim that finishes, carrying out control in view data receiving equipment 307 so that coding back view data 1 and 2 all is received with low bit rate.Thereby, after handover begins, data from encode the back view data 1 the 13rd frame begin to be sent out with low bit rate, and data from encode the back view data 2 the 7th frame begin to be sent out with low bit rate.So, from the 13rd frame of the back view data 1 of encoding and the 7th frame of coding back view data 2, these two kinds of view data all are received in view data receiving equipment 307.
The interval of the 16-20 frame of coding back view data 1 (the 10-14 frame of coding back view data 2) is in the handover interval, and in this handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 307.Therefore, in this handover interim, the loss of data of the 16-20 frame of coding back view data 1, and the loss of data of the 10-14 frame of coding back view data 2.
In determining the interval that handover finishes, from the 21st frame of the back view data 1 of encoding with from the 15th frame of view data 2 afterwards of encoding, data are received in order in view data receiving equipment 307 with low bit rate after handover finishes at interval.So, beginning from handover to the interim that finishes, the 13-15 frame of coding back view data 1 and the data of 21-28 frame and the 7-9 frame of coding back view data 2 and the data of 15-22 frame all are received in view data receiving equipment 307.Then, by selecting the 13-28 frame the view data behind the coding that has received from these, and subsequently with correct sequence arrangement data, thereby realized the reconstruction of view data.So, the 16-20 frame of losing in handover interim of coding back view data 1 is compensated.
Work example 5
Fig. 7 shows the illustrative arrangement as the image data communication system of the present invention's the 5th work example.In this image data communication system, view data discharge device 701 and view data receiving equipment 707 are connected, so that allow them to communicate with one another by radio network control device 705 and transmission line 106, IP network is structured on the Radio Physics layer in this transmission line 106.
View data discharge device 701 uses UDP/IP to view data receiving equipment 707 distribution encoded image data, and view data discharge device 701 has following structure, and it comprises image data storage/generation unit 702 and coding back view data transmitter 703 and 704.Image data storage/generation unit 702 and coding back view data transmitter 703 and 704 with image data storage/generation unit 103 shown in Figure 1 and coding after view data transmitter 104 and 105 basic identical.
Radio network control device 705 comes handoff operation in the monitoring image data receiver 707 based on line status, and described line status for example is the bit error rate of view data on the wireless radio transmission circuit of transmission line 706 behind the coding that receives in view data receiving equipment 707.In addition, during normal running, radio network control device 705 sends view data 1 behind the coding that sends from the back view data transmitter 703 of encoding with higher priority and/or power, so that coding back view data 1 is preferentially received in view data receiving equipment 707, in addition, for view data 2 behind the coding that sends from the back view data transmitter 704 of encoding, perhaps do not send coding back view data 2, perhaps send coding back view data 2 with lower priority and/or lower-wattage.In addition, when handover, radio network control device 705 reduces the priority and/or the power of coding back view data 1, and or cause coding back view data 2 to be sent out, perhaps improve its priority and/or power, view data 1 and 2 all is received view data receiving equipment 707 behind encode back view data transmitter 703 and 704 codings that send thereby make.
View data receiving equipment 707 is the client terminals that are connected to the radio IP network, and has following configuration, and it comprises coding back viewdata receiver 708 and 709, coding back data buffering/reconstruction unit 710 and decoder 711.These coding back viewdata receivers 708 and 709, coding back data buffering/reconstruction unit 710 and decoder 711 respectively with coding shown in Figure 1 after viewdata receiver 109 and 110, coding back data buffering/reconstruction unit 111 and decoder 112 basic identical.
Below explanation relates to the practical operation of the image data communication system of this work example.
Normal running at first is described, i.e. operation when view data receiving equipment 707 is mobile in particular radio zone (sub-district).In view data discharge device 701, coding back view data transmitter 703 sends coding back view data 1, and coding back view data transmitter 704 sends view data 2 behind the coding identical with coding back view data 1, and this coding back view data 2 has been delayed designated time intervals with respect to the transmission of view data 1 after encoding.
Radio network control device 705 sends view data 1 behind the coding that sends from the back view data transmitter 703 of encoding with higher priority and/or power, and or do not send view data 2 behind the coding that sends from the back view data transmitter 704 of encoding, perhaps send coding back view data 2 with lower priority and/or power.So, suppressed because the overflowing of the transmission line 706 that excessive flow caused.
In view data receiving equipment 707, coding back view data 1 is received in the viewdata receiver 708 behind coding at least.View data 1 is temporarily stored behind coding and in data buffering/reconstruction unit 710, is provided to decoder 711 subsequently behind these codings that receive, and at decoder 711 places experience decode procedure.
Below explanation relate to operation when handover, promptly behind received code, move to the operation of another neighboring radio when regional view data 1 time from current wireless electricity zone when view data receiving equipment 707.
Along with the distance to the regional base station of current wireless electricity increases, the bit error rate of view data on the wireless radio transmission circuit of transmission line 706 increases behind the coding that receives in view data receiving equipment 707.When bit error rate surpasses designated value, radio network control device 705 determines that handover begins, and the priority and/or the power of reduction coding back view data 1, and or cause coding back view data 2 to be sent out, perhaps improve the priority and/or the power of coding back view data 2, so that view data 1 and 2 all is received behind encode back view data transmitter 703 and 704 codings that send view data receiving equipment 707.So, coding back view data 1 and 2 all is received in view data receiving equipment 707.
Along with the distance to the regional base station of current wireless electricity further increases, the accepting state of coding back view data 1 and 2 in view data receiving equipment 707 further worsens, and it is impossible finally to become up to reception.It is handover starting point at interval that coding back view data 1 and 2 reception become impossible this time point.On the other hand, along with view data receiving equipment 707 is approaching as the base station in another radio areas of mobile destination, the accepting state of coding back view data 1 and 2 in view data receiving equipment 707 improved gradually, and the reception up to coding back view data 1 and 2 becomes possibility.It is handover end point at interval that coding back view data 1 and 2 reception become this possible time point.In handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 707, and therefore loss of data.
When the reception of coding back view data 1 and 2 became possibility, the bit error rate of view data on the wireless radio transmission circuit of transmission line 706 descended behind the coding that receives in view data receiving equipment 707.After the process designated time intervals of the moment below bit error rate drops to designated value, view data 1 after radio network control device 705 is determined that handovers finish and sent the coding that sends from the back view data transmitter 703 of encoding with higher priority and/or higher-wattage, and or view data 2 is sent out behind the coding that prevents to send from the back view data transmitter 704 of encoding, and perhaps sends coding back view data 2 with lower priority and/or lower-wattage.
During the appointed interval after handover finishes, coding back view data 1 and 2 all is received in view data receiving equipment 707.View data 2 has comprised the data of losing in handover interim all or part of of coding back view data 1 behind the coding that receives during this appointed interval.Coding back data buffering/reconstruction unit 710 is selected the corresponding data of obliterated data with coding back view data 1 view data 2 behind the coding that has received, and view data 1 behind correct arrangement data of selecting and the coding that receives, with a set of reconstructed image data.Rebuild by this, all or part of of obliterated data of coding back view data 1 compensated.View data after these are rebuild is provided to decoder 711 subsequently, and decoded at decoder 711 places.
After above-mentioned appointed interval, the above-mentioned normal running identical operations in execution and the view data receiving equipment 707.
Fig. 8 shows the actual example of the reconstruction of view data when above-mentioned handover.As coding back view data 1, the 7th frame, the 8th frame ..., the data of the 30th frame are sent out in this order, as coding back view data 2, the 1st frame, the 2nd frame ..., the data of the 24th frame are sent out in this order, have the time difference of 6 frames between these set of view data behind the coding 1 and 2.In the view data 1,7-14 frame and 27-30 frame (part shown in boldface letter) are the parts that is set to high priority behind coding, and 15-26 frame (part shown in light face) is to be set to the lower part of priority.In the view data 2,1-8 frame and 21-24 frame (part shown in small characters) are the parts that is set to low priority behind coding, and 9-20 frame (part shown in the character of band underscore) is the part that is set to normal priority.
In the example of Fig. 8, determine that handover begins when radio network control device 705 receives the 14th frame of coding back view data 1 in view data receiving equipment 707, and determine that handover finishes when in view data receiving equipment 707, receiving the 26th frame of coding back view data 1.In view data receiving equipment 707, the data of the 7-14 frame of coding back view data 1 were preferentially received before handover begins, and the data of the 27-30 frame of coding back view data 1 are preferentially received after handover finishes.
Beginning from handover to the interim the handover end, priority and/or power are controlled, so that coding back view data 1 and 2 all is received in view data receiving equipment 707.So, after handover begins, coding back view data 1 becomes lower since the 15th frame priority, and coding back view data 2 becomes normally since the 9th frame priority, from the 15th frame of the back view data 1 of encoding and the 9th frame of coding back view data 2, these two kinds of view data all are received in view data receiving equipment 707 thus.
From the interval between the 16th frame to the 20 frames (from the 10th frame to the 14 frames of the back view data 2 of encoding) of the back view data 1 of encoding handover at interval in, and in this handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 707.Therefore, in this handover interim, the loss of data of the 16-20 frame of coding back view data 1, and the loss of data of the 10-14 frame of coding back view data 2.
The interval of finishing at interval from handover between handover finishes, view data receiving equipment 707, be received in order from the 21st frame of the back view data 1 of encoding and from the view data that the 15th frame of the back view data 2 of encoding begins.Therefore, beginning from handover to the interim finishing, the 15th frame of coding back view data 1 and the data of 21-26 frame and the 9th frame of coding back view data 2 and the data of 15-20 frame all are received in view data receiving equipment 707.Then, the reconstruction of carries out image data the 15-20 frame of the 21-26 frame of view data 1 and coding back view data 2 behind the coding that has received, the be encoded 16-20 frame of back view data 2 of the 16-20 frame of view data 1 compensates behind the coding of losing in handover interim thus.
Work example 6
Fig. 9 shows the illustrative arrangement as the image data communication system of the 6th work example of the present invention.In this image data communication system, view data discharge device 901 and view data receiving equipment 906 are connected, so that allow to communicate by transmission line 905, IP network is structured on the Radio Physics layer in this transmission line 905.
View data discharge device 901 uses UDP/IP to view data receiving equipment 906 distribution encoded image data, and view data discharge device 901 has following structure, and it comprises image data storage/generation unit 902 and coding back view data transmitter 903 and 904.Image data storage/generation unit 902 is identical with coding back view data transmitter 304 and 305 with image data storage/generation unit 303 shown in Figure 3 with 904 with coding back view data transmitter 903, but in this work example, coding back view data transmitter 903 and 904 utilizes multicast (broadcasting) to distribute coding back view data 1 and 2 respectively in different sessions.
Transmission line 905 is as lower network: it allows the forwarding multicasting flow, and supports to be used to control IGMP (Internet Group Management Protocol) that adds/leave multicast group or the agreement that is equal to IGMP.
View data receiving equipment 906 is the client terminals that are connected to the radio IP network, and have following configuration, it comprises that multicast group adds/leave processor 907, coding back viewdata receiver 908 and 909, coding back data buffering/reconstruction unit 910 and decoder 911.Viewdata receiver 309 and 310, coding back data buffering/reconstruction unit 311 and decoder 312 are basic identical behind coding back viewdata receiver 908 and 909, coding back data buffering/reconstruction unit 910 and decoder 911 and the coding shown in Figure 3.
During normal running, multicast group adds/leaves processor 907 and adds multicast group by view data 1 behind the coding of coding back view data transmitter 903 distributions, and determines that based on the accepting state of coding back view data 1 handover begins.After definite handover begins, multicast group adds/leaves processor 907 and also adds multicast group by view data 2 behind the coding of coding back view data transmitter 904 distributions, and determines handover beginning and end at interval according to the accepting state of coding back view data 1 and 2.Multicast group adds/leaves processor 907 also finish through the fixed time interval at interval from handover after, determine that handover finishes, and after this determines, leave multicast group by view data 2 behind the coding of coding back view data transmitter 904 distributions.
Below explanation relates to the practical operation of the image data communication system of this work example.
Normal running at first is described, i.e. operation when view data receiving equipment 906 is mobile in particular radio zone (sub-district).During normal running, multicast group adds/leaves processor 907 and added multicast group by view data 1 behind the coding of coding back view data transmitter 903 distributions, and therefore is received in the viewdata receiver 908 behind the coding of coding back view data 1 in view data receiving equipment 906.View data 1 is temporarily stored behind coding and in data buffering/reconstruction unit 910, is provided to decoder 911 subsequently behind these codings that received, and in the experience decoding of decoder 911 places.
Below explanation relates to operation when handover, promptly moves to the operation of another neighboring radio when regional view data 1 time from current wireless electricity zone when view data receiving equipment 906 behind received code.
Along with the distance to the base station in current wireless electricity zone increases, the accepting state of coding back view data 1 in view data receiving equipment 906 worsens, and loses the factor and increase.Lose the factor when surpassing designated value when this, multicast group adds/leaves processor 907 and determines that handovers begin, and adds the multicast group by view data 2 behind the coding of coding back view data transmitter 904 distributions.Therefore, after handover began, the set with view data 1 behind the identical coding of fixed time difference and 2 all was received in view data receiving equipment 906.
Along with the distance to the base station in current wireless electricity zone further increases, the accepting state of coding back view data 1 and 2 in view data receiving equipment 906 further worsens, and receive finally become impossible.It is handover starting point at interval that coding back view data 1 and 2 reception become impossible this time point.On the other hand, along with view data receiving equipment 906 is approaching as the base station in another radio areas of mobile destination, the accepting state of coding back view data 1 and 2 in view data receiving equipment 906 improved gradually, and final reception of encoding back view data 1 and 2 becomes possibility.2 of view data 1 reception becomes the end point that this possible time point is the handover interval behind the coding.In handover interim, coding back view data 1 and 2 all can't be received in view data receiving equipment 906, so loss of data.
During the appointed interval after the handover interval, multicast group adds/leaves processor 907 and belongs to by each the multicast group in the view data 1 and 2 behind the coding of coding back view data transmitter 904 distributions, and therefore coding back view data 1 and 2 all is received in view data receiving equipment 906.View data 2 comprises the data of losing in handover interim all or part of of coding back view data 1 behind the coding that receives during this appointed interval.Coding back data buffering/reconstruction unit 910 is selected the corresponding data of obliterated data with coding back view data 1 view data 2 behind the coding that has received, and correctly arrange view data 1 behind these data selected and the coding that receives, with a set of reconstructed image data.By this reconstruction, all or part of of obliterated data of coding back view data 1 compensated.The view data of Chong Jianing is provided to decoder 911 subsequently by this way, and decoded at decoder 911 places.
After above-mentioned appointed interval, multicast group adds/leaves processor 907 and determines that handover finishes, and leaves the multicast group by view data 2 behind the coding of coding back view data transmitter 904 distributions.Therefore, the reception of coding back view data 2 in view data receiving equipment 906 ended, and carries out and above-mentioned normal running identical operations subsequently.
According to each the image data communication system among the above-mentioned work example 1-6, all or part of of data of losing in handover interim can be compensated, and can provide higher picture quality thus.
In addition, when having the rest network resource, the view data receiving equipment can received code after view data 1 and 2 both, thus, even a set of coding back view data can be lost, this another set of losing the back view data that also can be encoded compensates.Therefore, the situation for except the handover interval can obtain higher stable image quality.In addition, utilize the method for broadcasting method to be used.For example, coding back view data 1 and 2 can be received all the time, perhaps has only coding back view data 1 to be received during normal running, then respectively before handover and the reception of carrying out coding back view data 2 afterwards begin and receive termination.These methods do not need to add and leave the process of multicast group.Though the consumption of Internet resources may be very big in these examples, can eliminate the demand that adds/leave processor 907 for multicast group, and can simplify processing.
The image data communication system of each example in the above-mentioned work example all only is an example.The present invention is not limited to the form shown in the figure of each example in these work examples, and its configuration can suitably be revised.For example, reconstruction is to realize by the essential data of selection two set of view data behind the same-code with fixed time difference, but the data of using in this reconstruction also can be three or more set with view data behind the same-code of fixed time difference.In this case, the reconstructions of using three or more set of view data behind the same-code with the fixed time difference frame of compensating missing more reliably.
In addition, can adopt configuration, and each in the view data 1 and 2 can be transmitted behind the coding by different transmission lines with a plurality of transmission lines.
In addition, though be that coding back view data is sent out in the explanation of work example, but also can only distribute the motion picture view data of having stored to replace these coding back view data, perhaps send the motion picture view data that generates by the existing view data of conversion in real time.
In the image data communication system of each example in above-mentioned work example, view data discharge device and view data communication equipment for example correspond respectively to server and client terminal; And wherein arbitrary equipment all is to utilize to have the computer system that is used for stored program memory devices and realize.View data discharge device described in each example in above-mentioned work example and all operations in the view data communication equipment all are to utilize to cause computer to be carried out with these programs of operating relevant process to realize.
In addition, the frame of view data can be following image data packets behind the coding of each example in the above-mentioned work example, and in this grouping, the identical point of the same number of frames of each set of coding back view data is encoded.
At last, though described the present invention according to the foregoing description, but the present invention is not limited to the form of the foregoing description, and certainly in the scope as each claims of the present invention, carries out contingent for a person skilled in the art various modifications and conversion.
Claims (61)
1. image data communication system comprises:
The view data discharge device is used for a plurality of set that the order distribution has the identical motion picture view data of fixed time difference; And
The view data receiving equipment is used for when moving between a plurality of radio areas, receives from the motion picture view data of described view data discharge device distribution;
Wherein said view data receiving equipment is when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive described a plurality of set with identical motion picture view data of fixed time difference from described view data discharge device distribution, and from the motion picture view data that receives, select desired data, to rebuild a set of motion picture view data.
2. image data communication system as claimed in claim 1, a plurality of set of wherein said identical motion picture view data are a plurality of set of coding back view data, in the view data of described coding back, identical view data is coded by identical coding method.
3. image data communication system as claimed in claim 2, wherein:
Described view data discharge device comprises:
Coding back image data transmission apparatus, be used at least at described appointed interval, a plurality of set of view data after order on the transmission line sends described identical coding with fixed time difference, and during this sent, each set behind described identical coding in a plurality of set of image data information gave described reconstruction required information; And
Described view data receiving equipment comprises:
Coding back image data reception device is used for receiving a plurality of set that have view data behind the identical coding of described fixed time difference from described coding back image data transmission apparatus described by described transmission line; And
Reconstructing device, a plurality of set of view data behind the described identical coding with described fixed time difference that is used for being reconstituted in reference to the required information of described reconstruction of having given coding back view data that described coding back image data reception device received are as a set of coding back view data.
4. image data communication system as claimed in claim 3, wherein:
Described view data discharge device also comprises control device, be used for a plurality of set, carry out the specified control setting on the described transmission line for view data behind the described identical coding with fixed time difference that sends from described coding back image data transmission apparatus; And
Described control device is carried out described specified control setting, so that during the normal running except described appointed interval, in described a plurality of set with view data behind the identical coding of fixed time difference, the named aggregate of coding back view data is preferentially received in described view data receiving equipment at least; And described specified control is set, so that during described appointed interval, a plurality of set of view data all are received in described view data receiving equipment behind the described identical coding with fixed time difference.
5. image data communication system as claimed in claim 4, wherein:
Described view data receiving equipment also comprises the control information processing unit, is used for determining based on the accepting state of view data behind the coding of described coding back image data reception device the beginning and the end of described handover;
Described control information processing unit has both sent to described control device when described handover begins and had begun notice, also when described handover finishes through after the designated time intervals to described control device transmission end notification; And
Described control device is carried out described specified control setting describedly to begin to notify under the situation of interval as described appointed interval that receives between the described end notification from receiving.
6. image data communication system as claimed in claim 4, wherein:
Described view data receiving equipment also comprises the control information processing unit, is used for determining based on the accepting state of view data behind the coding of described coding back image data reception device the beginning of described handover;
Described control information processing unit sends for changing first request that described specified control is provided with to described control device when described handover begins, and when described handover finishes through sending for second asking of changing that described specified control is provided with to described control device after the designated time intervals; And
Described control device is carried out described specified control setting with from receiving under described first situation of interval as described appointed interval of asking to receive between described second request.
7. image data communication system as claimed in claim 4, wherein:
Described view data receiving equipment also comprises the receiving state report device, be used for the interval of appointment with the coding of described coding back image data reception device after the receiving state report of view data give described view data discharge device; And
Described control device is based on beginning and the end of determining described handover from the receiving state report of described receiving state report device, and to have comprised that described handover carries out described specified control setting at interval and from described the end under the situation of interval as described appointed interval through the interval the designated time intervals.
8. as any one the described image data communication system in the claim 4 to 7, wherein said specified control setting is the route priority control on the described transmission line.
9. image data communication system as claimed in claim 8, wherein during described normal running, the described route priority that view data is relevant after the described specified coding behind described control device and the described identical coding with fixed time difference in a plurality of set of view data is set to be higher than the route priority of other coding back view data; And during described appointed interval, both relevant with view data after the described specified coding described route priority is set to be lower than the route priority during described normal running, and also relevant with described other coding back view data described route priority is set to be higher than the route priority during described normal running.
10. as any one the described image data communication system in the claim 4 to 7, wherein said specified control setting is as the power control on the wireless radio transmission circuit of the part of described transmission line.
11. image data communication system as claimed in claim 10, wherein: during described normal running, described control device will with described identical coding with fixed time difference after power setting on view data is relevant after the described specified coding in a plurality of set of view data the described wireless radio transmission circuit be the power that is higher than at other coding back view data, and during described appointed interval, to be the power that is lower than during described normal running in the power setting on the described wireless radio transmission circuit relevant with view data after the described specified coding both, will be the power that is higher than during described normal running in the power setting on the described wireless radio transmission circuit relevant with described other coding back view data also.
12. as any one the described image data communication system in the claim 4 to 7, wherein said specified control setting is the bit rate of view data behind the coding that transmits on the described transmission line.
13. image data communication system as claimed in claim 12, wherein: during described normal running, the described bit rate that view data is relevant after the described specified coding behind described control device and the described identical coding with fixed time difference in a plurality of set of view data is set to be higher than the bit rate of other coding back view data; And during described appointed interval, both relevant with view data after the described specified coding described bit rate is set to be lower than the bit rate during described normal running, and also relevant with described other coding back view data described bit rate is set to be higher than the bit rate during described normal running.
14. image data communication system as claimed in claim 3 also comprises:
The radio net watch-dog is used to monitor the state as the wireless radio transmission circuit of the part of described transmission line; And, carry out specified control setting on the described transmission line for a plurality of set of view data behind the described identical coding with fixed time difference that sends from described coding back image data transmission apparatus according to the state of described wireless radio transmission circuit;
Wherein:
Described radio net watch-dog is carried out described specified control setting during the normal running except described appointed interval, so that in described a plurality of set with view data behind the identical coding of fixed time difference, view data is preferentially received in described view data receiving equipment after the specified coding at least; And during described appointed interval, carry out described specified control setting, so that a plurality of being integrated in the described view data receiving equipment of view data received together behind the described identical coding with fixed time difference.
15. image data communication system as claimed in claim 14, wherein said specified control setting are the route priority control on the described transmission line.
16. image data communication system as claimed in claim 15, wherein said radio net watch-dog is during described normal running, be set to be higher than the route priority of other coding back view data with the described route priority that view data is relevant after the described specified coding in a plurality of set of view data behind the described identical coding with fixed time difference, and during described appointed interval, both relevant with view data after the described specified coding described route priority is set to be lower than the route priority during described normal running, and also relevant with described other coding back view data described route priority is set to be higher than the route priority during described normal running.
17. image data communication system as claimed in claim 14, the power control on the wireless radio transmission circuit that wherein said specified control setting is described transmission line.
18. image data communication system as claimed in claim 17, wherein said radio net watch-dog during described normal running, will with described identical coding with fixed time difference after power setting on view data is relevant after the described specified coding in a plurality of set of view data the described wireless radio transmission circuit be the power that is higher than at other coding back view data; And during described appointed interval, to be the power that is lower than during described normal running in the power setting on the described wireless radio transmission circuit relevant with view data after the described specified coding both, will be the power that is higher than during described normal running in the power setting on the described wireless radio transmission circuit relevant with described other coding back view data also.
19. image data communication system as claimed in claim 3, wherein:
Described coding back image data transmission apparatus is configured to allow multicast or the broadcast distribution to each set in a plurality of set of view data behind the identical coding that transmits on described transmission line; And
Described view data receiving equipment also comprises receiving system, be used for during the normal running except described appointed interval, receive the multicast or the broadcast traffic of view data after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference, and during described appointed interval, receive the multicast or the broadcast traffic of each set in a plurality of set of view data behind the described identical coding with fixed time difference.
20. image data communication system as claimed in claim 3, wherein:
Described coding back image data transmission apparatus is configured to allow the multicast distribution to each set in a plurality of set of view data behind the described identical coding that transmits on described transmission line; And
Described view data receiving equipment also comprises multicast group adding/separating device, be used for during the normal running except described appointed interval, add the multicast group of view data after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference; And during described appointed interval, add the multicast group of each set in a plurality of set of view data behind the described identical coding with fixed time difference.
21. a view data discharge device, this equipment is connected, and communicates by letter with the view data receiving equipment that moves between a plurality of radio areas by transmission line so that allow; Described view data discharge device comprises:
Coding back image data generating device is used to generate a plurality of set of view data behind the identical coding, and in the view data, identical view data is encoded behind described identical coding;
Coding back image data transmission apparatus is used for a plurality of set with time difference view data behind the identical coding that order transmission on the described transmission line has been generated by described coding back image data generating device of appointment; And
Control device, be used to carry out the specified control setting on the described transmission line, so that when betiding the handover of described view data receiving equipment in current wireless electricity zone moves to another adjacent radio areas, a plurality of being integrated into the appointed interval of view data is received in described view data receiving equipment behind the described identical coding with fixed time difference that described coding back image data transmission apparatus sends.
22. view data discharge device as claimed in claim 21, wherein said specified control setting are the route priority control on the described transmission line.
23. view data discharge device as claimed in claim 22, wherein said control device is set to be higher than the route priority of other coding back view data with the described route priority that view data is relevant after the described at least specified coding in a plurality of set of view data behind the described identical coding with fixed time difference during the described normal running except described appointed interval; And during described appointed interval, both relevant with view data after the described specified coding described route priority is set to be lower than the route priority during described normal running, and also relevant with described other coding back view data described route priority is set to be higher than the route priority during described normal running.
24. view data discharge device as claimed in claim 21, wherein said specified control setting are as the control of the power on the wireless radio transmission circuit of the part of described transmission line.
25. view data discharge device as claimed in claim 24, wherein
Described control device is during the described normal running except described appointed interval, will with described identical coding with fixed time difference after power setting on view data is relevant after the described at least specified coding in a plurality of set of view data the described wireless radio transmission circuit be the power that is higher than at other coding back view data, and during described appointed interval, to be the power that is lower than during described normal running in the power setting on the described wireless radio transmission circuit relevant with view data after the described specified coding both, will be the power that is higher than during described normal running in the power setting on the described wireless radio transmission circuit relevant with described other coding back view data also.
26. view data discharge device as claimed in claim 21, wherein said specified control setting are the bit rates of view data behind the coding that transmits on the described transmission line.
27. view data discharge device as claimed in claim 26, wherein said control device is set to be higher than the bit rate of other coding back view data with the described bit rate that view data is relevant after the described at least specified coding in a plurality of set of view data behind the described identical coding with fixed time difference during the described normal running except described appointed interval; And during described appointed interval, both relevant with the described first coding back view data described bit rate is set to be lower than the bit rate during described normal running, and also relevant with described other coding back view data described bit rate is set to be higher than the bit rate during described normal running.
28. view data receiving equipment, this equipment is connected, communicate by letter with the view data discharge device by transmission line so that allow, this view data discharge device is distributed a plurality of set of view data behind the identical coding in proper order with the time difference of appointment, in the view data, identical view data is encoded behind described identical coding; Described view data receiving equipment comprises:
Coding back image data reception device, be used for when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive a plurality of set that have view data behind the identical coding of fixed time difference from described view data discharge device distribution described; And
The data reconstructing device is used for from selecting desired data a plurality of set of view data behind the described identical coding with fixed time difference that described appointed interval receives, to rebuild a set of coding back view data.
29. view data receiving equipment as claimed in claim 28, wherein:
Described view data discharge device is carried out multicast or the broadcast distribution to each set in a plurality of set of view data behind the described identical coding; And
Described view data receiving equipment also comprises as lower device, this device is used for during the described normal running except described appointed interval, receives the multicast or the broadcast traffic of view data after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference; And during described appointed interval, receive the multicast or the broadcast traffic of each set in a plurality of set of view data behind the described identical coding.
30. view data receiving equipment as claimed in claim 28, wherein:
Described view data discharge device is carried out multicast or the broadcast distribution to each set in a plurality of set of view data behind the described identical coding; And
Described view data discharge device also comprises multicast group adding/separating device, be used for during the described normal running except described appointed interval, add the multicast group of view data after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference; And during described appointed interval, add the multicast group of each set in a plurality of set of view data behind the described identical coding.
31. an image data communication method of carrying out in communication system, in described communication system, view data discharge device and view data receiving equipment are connected, and communicate by transmission line so that allow; Described image data communication method comprises:
First step, in this step, a plurality of set that described view data discharge device will have the identical motion picture view data of fixed time difference are distributed to described view data receiving equipment in proper order; And
Second step, in this step, described view data receiving equipment is when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive described a plurality of set with identical motion picture view data of fixed time difference from described view data discharge device distribution, and from the motion picture view data that receives, select desired data, to rebuild a set of motion picture view data.
32. image data communication method as claimed in claim 31, wherein:
Described first step comprises the steps, in this step, described view data discharge device is when sending a plurality of set of described identical motion picture view data, and each set in a plurality of set of described identical motion picture view data gives described reconstruction required information; And
Described second step may further comprise the steps, in this step, described view data receiving equipment is reconstituted in described a plurality of set with identical motion picture view data of described fixed time difference of having distributed from described view data discharge device in the described appointed interval with reference to the required described information of described reconstruction of giving described motion picture view data, as a set of motion picture view data.
33. image data communication method as claimed in claim 31, wherein said first step comprises:
Following steps, in this step, described view data discharge device is during the normal running except described appointed interval, carry out the specified control setting on the described transmission line, so that in a plurality of set of described identical motion picture view data with fixed time difference, the motion picture view data of appointment is preferentially received in described view data receiving equipment at least; And
Following steps, in this step, described view data discharge device is carried out described specified control setting during described appointed interval, so that described a plurality of being integrated in the described view data receiving equipment with identical motion picture view data of fixed time difference received together.
34. image data communication method as claimed in claim 33, wherein:
Described second step comprises:
Following steps, in this step, described view data receiving equipment is determined the beginning and the end of described handover based on the accepting state of described motion picture view data; And
Following steps, in this step, described view data receiving equipment has both sent to described view data discharge device when described handover begins and had begun notice, also when described handover finishes through after the designated time intervals to described view data discharge device transmission end notification; And
Described first step comprises:
Following steps, in this step, described view data discharge device is carried out described specified control setting describedly to begin to notify under the situation of interval as described appointed interval that receives between the described end notification from receiving.
35. image data communication method as claimed in claim 33, wherein:
Described second step comprises:
Following steps, in this step, described view data receiving equipment is determined the beginning and the end of described handover based on the accepting state of described motion picture view data; And
Following steps, in this step, described view data receiving equipment sends for changing first request that described specified control is provided with to described view data discharge device when described handover begins, and when described handover finishes through sending for second asking of changing that described specified control is provided with to described view data receiving equipment after the designated time intervals; And
Described first step comprises:
Following steps, in this step, described view data discharge device is carried out described specified control setting with from receiving under described first situation of interval as described appointed interval of asking to receive between described second request.
36. image data communication method as claimed in claim 33, wherein:
Described second step comprises the steps that in this step, described view data receiving equipment is reported the accepting state of described motion picture view data to described view data discharge device with designated time intervals; And
Described first step comprises the steps, in this step, described view data discharge device is based on beginning and the end of determining described handover from the receiving state report of described view data receiving equipment, and under the situation of interval, carrying out described specified control setting as described appointed interval through the interval the designated time intervals with the interval that comprised described handover with from described the end.
37. as any one the described image data communication method in the claim 33 to 36, wherein said specified control setting is the route priority control on the described transmission line.
38. image data communication method as claimed in claim 37, wherein said first step comprises the steps, in this step, described view data discharge device is during described normal running, the described route priority relevant with the motion picture view data of described appointment in a plurality of set of described identical motion picture view data with fixed time difference is set to be higher than the route priority of other motion picture view data, and during described appointed interval, both relevant with the motion picture view data of described appointment described route priority is set to be lower than the route priority during described normal running, and also relevant with described other motion picture view data described route priority is set to be higher than the route priority during described normal running.
39. as any one the described image data communication method in the claim 33 to 36, wherein said specified control setting is the power control on the wireless radio transmission circuit of described transmission line.
40. image data communication method as claimed in claim 39, wherein said first step comprises the steps, in this step, described view data discharge device is during described normal running, will with a plurality of set of described identical motion picture view data with fixed time difference in the relevant described wireless radio transmission circuit of the motion picture view data of described appointment on power setting be the power that is higher than at other motion picture view data, and during described appointed interval, to be the power that is lower than during described normal running in the power setting on the described wireless radio transmission circuit relevant with the motion picture view data of described appointment both, will be the power that is higher than during described normal running in the power setting on the described wireless radio transmission circuit relevant with described other motion picture view data also.
41. as any one the described image data communication method in the claim 33 to 36, wherein said specified control setting is the bit rate of view data behind the coding that transmits on the described transmission line.
42. image data communication method as claimed in claim 41, wherein said first step comprises the steps, in this step, described view data discharge device is during described normal running, the described bit rate relevant with the motion picture view data of described appointment in a plurality of set of described identical motion picture view data with fixed time difference is set to be higher than the bit rate of other motion picture view data, and during described appointed interval, both relevant with the motion picture view data of described appointment described bit rate is set to be lower than the bit rate during described normal running, and also relevant with described other motion picture view data described bit rate is set to be higher than the bit rate during described normal running.
43. image data communication method as claimed in claim 31 also comprises:
Third step, in this step, be used to monitor as the radio net watch-dog of the state of the wireless radio transmission circuit of the part of described transmission line state, carry out specified control setting on the described transmission line for the set of the identical motion picture view data that sends from described view data discharge device according to described wireless radio transmission circuit; And
The 4th step, in this step, described radio net watch-dog is during the normal running except described appointed interval, carry out described specified control setting, so that the motion picture view data of the appointment at least in a plurality of set of described identical motion picture view data with fixed time difference is preferentially received in described view data receiving equipment; And during described appointed interval, carry out described specified control setting, so that described a plurality of being integrated in the described view data receiving equipment with identical motion picture view data of fixed time difference received together.
44. image data communication method as claimed in claim 43, wherein said specified control setting are the route priority control on the described transmission line.
45. image data communication method as claimed in claim 44, also comprise the steps, wherein said radio net watch-dog is during described normal running, and the described route priority relevant with the motion picture view data of described appointment in a plurality of set of described identical motion picture view data with fixed time difference is set to be higher than the route priority of other motion picture view data; And during described appointed interval, both relevant with the motion picture view data of described appointment described route priority is set to be lower than the route priority during described normal running, and also relevant with described other motion picture view data described route priority is set to be higher than the route priority during described normal running.
46. image data communication method as claimed in claim 43, wherein said specified control setting are the power control on the wireless radio transmission circuit of described transmission line.
47. image data communication method as claimed in claim 46, also comprise the steps, wherein said radio net watch-dog during described normal running, will with a plurality of set of described identical motion picture view data with fixed time difference in the relevant described wireless radio transmission circuit of the motion picture view data of described appointment on power setting be the power that is higher than at other motion picture view data; And during described appointed interval, to be the power that is lower than during described normal running in the power setting on the described wireless radio transmission circuit relevant with the motion picture view data of described appointment both, will be the power that is higher than during described normal running in the power setting on the described wireless radio transmission circuit relevant with described other motion picture view data also.
48. image data communication method as claimed in claim 31 also comprises:
Following steps, wherein said view data discharge device are carried out multicast or the broadcast distribution to each set in a plurality of set of described identical motion picture view data with fixed time difference; And
Following steps, wherein said view data receiving equipment is during the described normal running except described appointed interval, receive the multicast or the broadcast traffic of the motion picture view data of the appointment at least in a plurality of set of described identical motion picture view data with fixed time difference, and during described appointed interval, receive the multicast or the broadcast traffic of each set in a plurality of set of described identical motion picture view data with fixed time difference.
49. image data communication method as claimed in claim 31 also comprises:
Following steps, wherein said view data discharge device are carried out the multicast distribution to each set in a plurality of set of described identical motion picture view data with fixed time difference; And
Following steps, wherein said view data receiving equipment is during the normal running except described appointed interval, the multicast group that adds the motion picture view data of the appointment at least in a plurality of set of described identical motion picture view data with fixed time difference, and during described appointed interval, add described each multicast group with a plurality of set of poor identical motion picture view data of fixed time.
50. as any one the described image data communication method in the claim 31 to 49, a plurality of set of wherein said identical motion picture view data are a plurality of set that utilize view data behind the coding that identical coding method encodes to identical view data therein.
51. a program of using in communication system, in described communication system, server and client terminal are connected, and communicate described program by transmission line so that allow:
Cause the computer of described server to carry out first process, a plurality of set that this process is used for having the identical motion picture view data of fixed time difference are distributed to described client terminal in proper order; And
Cause the computer of described client terminal to carry out second process, this process is used for when the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive described a plurality of set with identical motion picture view data of fixed time difference from described server distribution, and from the motion picture view data that receives, select desired data, to rebuild a set of motion picture view data.
52. a program of using in server, described server is connected, so that allow to communicate by letter with the client terminal that moves between a plurality of radio areas by transmission line, described program causes the computer of described server to be carried out:
First process is used to generate a plurality of set of view data behind the identical coding, and in the view data, identical view data is encoded behind described identical coding;
Second process is used for sending a plurality of set of view data behind the identical coding that described first process generates with the time difference of appointment in order on the described transmission line; And
The 3rd process, be used for when betiding the handover of described client terminal in current wireless electricity zone moves to another adjacent radio areas, carry out the specified control setting on the described transmission line, so that a plurality of being integrated in the appointed interval of view data is received behind the described identical coding with fixed time difference that sends in described client terminal in described second process.
53. program as claimed in claim 52, wherein said specified control setting are the route priority control on the described transmission line.
54. program as claimed in claim 53, wherein said program cause the computer of described server also to carry out following process:
During the normal running except described appointed interval, be set to be higher than the route priority of other coding back view data with the described route priority that view data is relevant after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference; And
During described appointed interval, both relevant with view data after the described specified coding described route priority is set to be lower than the route priority during described normal running, and also relevant with described other coding back view data described route priority is set to be higher than the route priority during described normal running.
55. program as claimed in claim 52, wherein said specified control setting are as the control of the power on the wireless radio transmission circuit of the part of described transmission line.
56. program as claimed in claim 55, wherein said program cause the computer of described server also to carry out following process:
During the described normal running except described appointed interval, will with described identical coding with fixed time difference after power setting on view data is relevant after the specified coding at least in a plurality of set of view data the described wireless radio transmission circuit be the power that is higher than at other coding back view data; And
During described appointed interval, to be the power that is lower than during described normal running in the described power setting on the described wireless radio transmission circuit relevant with view data after the described specified coding both, will be the power that is higher than during described normal running in the power setting on the described wireless radio transmission circuit relevant with described other coding back view data also.
57. program as claimed in claim 52, wherein said specified control setting are the bit rates of view data behind the coding that transmits on the described transmission line.
58. program as claimed in claim 57, wherein said program cause the computer of described server also to carry out following process:
During the described normal running except described appointed interval, be set to be higher than the bit rate of other coding back view data with the described bit rate that view data is relevant after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference; And
During described appointed interval, both relevant with view data after the described specified coding described bit rate is set to be lower than the bit rate during described normal running, and also relevant with described other coding back view data described bit rate is set to be higher than the bit rate during described normal running.
59. program of in client terminal, using, described client terminal is connected, so that allow by transmission line and server communication, described server is distributed a plurality of set of view data behind the identical coding with fixed time difference order, in the view data, identical image is encoded behind described identical coding; Described program causes the computer of described client terminal to carry out following process:
When the handover that betides in current wireless electricity zone moves to another adjacent radio areas, in appointed interval, receive a plurality of set that have view data behind the identical coding of fixed time difference from described server distribution described; And
Behind the described identical coding with fixed time difference that described appointed interval, has received, select desired data in a plurality of set of view data, to rebuild a set of coding back view data.
60. program as claimed in claim 59, wherein said program cause the computer of described client terminal also to carry out following process:
Multicast or broadcast distribution to each set in a plurality of set of view data behind the described identical coding; And
During the described normal running except described appointed interval, receive the multicast or the broadcast traffic of view data after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference, and during described appointed interval, receive the multicast or the broadcast traffic of each set in a plurality of set of view data behind the described identical coding.
61. program as claimed in claim 59, wherein said program cause the computer of described client terminal also to carry out following process:
Multicast distribution to each set in a plurality of set of view data behind the described identical coding; And
During the described normal running except described appointed interval, add the multicast group of view data after the specified coding at least in a plurality of set of view data behind the described identical coding with fixed time difference; And during described appointed interval, add the multicast group of each set in a plurality of set of view data behind the described identical coding.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003165064 | 2003-06-10 | ||
| JP165064/2003 | 2003-06-10 | ||
| JP184606/2003 | 2003-06-27 |
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| Publication Number | Publication Date |
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| CN1826821A true CN1826821A (en) | 2006-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2004800163817A Pending CN1826821A (en) | 2003-06-10 | 2004-06-01 | Image data communication system and image data communication method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102823185A (en) * | 2010-04-09 | 2012-12-12 | 日本电气株式会社 | Transmission system |
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- 2004-06-01 CN CNA2004800163817A patent/CN1826821A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102823185A (en) * | 2010-04-09 | 2012-12-12 | 日本电气株式会社 | Transmission system |
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