CN203151681U - Detection system for remote media playing signal time delay - Google Patents
Detection system for remote media playing signal time delay Download PDFInfo
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- CN203151681U CN203151681U CN 201320036591 CN201320036591U CN203151681U CN 203151681 U CN203151681 U CN 203151681U CN 201320036591 CN201320036591 CN 201320036591 CN 201320036591 U CN201320036591 U CN 201320036591U CN 203151681 U CN203151681 U CN 203151681U
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Abstract
The utility model provides a detection system for remote media playing signal time delay; a server-side signal sampling unit carries out a plurality of samplings on remote media playing signals of each play stream of N play streams, and first characteristic codes are then formed by a first characteristic code generating unit; each first characteristic code and each sampling time are stored by a first storage unit in a mutually corresponding manner; a client-side signal sampling unit samples currently playing remote media playing signals at a client-side sampling time, and second characteristic codes are then formed by a second characteristic code generating unit; a server-side sampling time obtaining unit is employed to obtain server-side signal sampling times matched with the second characteristic codes in the first characteristic codes, and a signal time delay obtaining unit is employed to obtain signal time delay of the client-side and the server-side for a same remote media playing signal. The detection system can realize effective and accurate detection of time delay of remote media playing signals.
Description
Technical field
The utility model relates to TV technology, is specifically related to a kind of detection system that detects remote media play signal time delay.
Background technology
Along with constantly the popularizing of intelligent television, the continuous lifting of the intelligent degree of set-top box and the continuous rise of Web TV, TV more and more is deep in the daily work of people and the life, and is playing the part of more and more important role.For TV, people have no longer contented just to watch merely program, but wish and can for example embed advertisement etc. in television set, set-top box or PC application program and some application that are associated with the remote media play signal of embedding during WEB uses.And often can face same remote media play signal this moment in the problem of zones of different time of occurrence delay (being designated hereinafter simply as " time delay "); for example; when the spectators B before the spectators A before a certain television set and another television set watches same TV programme, watch the time of same picture also inconsistent.Cause the reason of above-mentioned time delay that all many-sides are arranged, for example, the time delay of TV station's signal in communication process, the server of set-top box manufacturer is done the remote media play signal and is resolved the time delay that recompile then causes, network delay etc.
For this reason, reduce even eliminate the nonsynchronous problem of signal that above-mentioned time delay causes with regard to needs.And in order to reduce even to eliminate the asynchronous problem of the signal that causes because of time delay, at first need to detect exactly the time delay of remote media play signal.Yet occurring as yet in actual applications, can be effectively and detect the detection system of remote media play signal time delay exactly.
The utility model content
For addressing the above problem, the utility model provides a kind of detection system of remote media play signal time delay, and it can detect the time delay of the remote media play signal between server end and the client exactly.
For this reason, the utility model provides a kind of detection system of remote media play signal time delay, it comprises: server end signal sampling unit, be used for N the remote media play signal of playing each broadcast stream of stream of server end carried out a plurality of samplings, and wherein N is the integer more than or equal to 1; The first condition code generation unit is used for all generating corresponding first condition code at each sampled data from server end signal sampling unit; First memory cell is used for playing stream corresponding to each, will with corresponding respectively first condition code of this broadcasts stream, and corresponding each sampling instant of each first condition code store with corresponding to each other; The client signal sampling unit is used at client sampling instant Ts2 ', and the remote media play signal of the current broadcast of client is sampled; The second condition code generation unit is used for generating second condition code according to the sampled data from the client signal sampling unit; Server end sampling instant acquiring unit is used for the Ts1 of the corresponding server end signal sampling moment of first condition code that obtains to be complementary with it based on described second condition code; And signal time delay obtains the unit, is used for based on described server end signal sampling Ts1, described client signal sampling instant Ts2 ' constantly, and obtains client and server end for the signal time delay Td of same remote media play signal.
Wherein, described server end sampling instant acquiring unit comprises to be play the stream identification module and searches module, and described broadcast stream identification module is used for the broadcast traffic identifier that comprises based on described second condition code and the broadcast stream that identify customer end is play at described client signal sampling instant Ts2 '; And the described module of searching is used for searching each first condition code corresponding with this broadcasts stream in the data of described first cell stores, and searches first condition code and the Ts1 of the corresponding server end signal sampling moment of this first condition code that is complementary with described second condition code in described each first condition code
Wherein, described server end sampling instant acquiring unit is arranged on server end, and based on the corresponding server end signal sampling of first condition code that obtains to be complementary with it from described second condition code of client Ts1 constantly.Perhaps, described server end sampling instant acquiring unit is arranged on client, and based on being used for obtaining server end signal sampling data and described second condition code constantly from server end, the corresponding server end signal sampling of first condition code that acquisition and described second condition code are complementary is Ts1 constantly, and flow corresponding respectively first condition code, each sampling instant corresponding with each first condition code described comprising with each broadcast be used to the data of obtaining the server end signal sampling moment.
Wherein, the detection system of the remote media play signal time delay that the utility model provides also comprises the clock reference converting unit, this clock reference converting unit is arranged on server end or client, be used for when the clock signal with server end is reference clock signal, client signal sampling instant Ts2 ' is converted to the indicated client sampling instant Ts2 of corresponding server end clock signal with it, and based on formula Td=Ts2-Ts1 and picked up signal time delay Td; Perhaps when the clock signal with client is reference clock signal, with the server end signal sampling constantly Ts1 be converted to the indicated server end sampling instant Ts1 ' of clients corresponding clock signal with it, and based on formula Td=Ts2 '-Ts1 ' and picked up signal time delay Td.
Wherein, the detection system of the remote media play signal time delay that the utility model provides also comprises the network delay computing unit, be used for when there is network delay in the transfer of data between server end and the client, calculating this network delay, and described network delay is rejected in described signal time delay acquisition unit when calculating described signal time delay.
Wherein, described first condition code is consistent with the data type of second condition code, and described data type comprises the combination of finger image or audio-frequency fingerprint or finger image and audio-frequency fingerprint.
Wherein, described server end signal sampling unit and described client signal sampling unit are image data acquiring card and/or audio data collecting card.
Wherein, described client sampling instant Ts2 ' switches the moment of playing stream corresponding to client.
Wherein, described client comprises intelligent television, PC, set-top box, mobile phone or panel computer for resolving the smart machine of remote media play signal.
With respect to prior art, the utlity model has following beneficial effect:
In the detection system of the remote media play signal time delay that the utility model provides, by at server end and client same remote media play signal being sampled, and based on the difference in these two sampling times and obtain the time delay of remote media play signal.Particularly, carry out a plurality of samplings by the remote media play signal that stream is play to N each that play in the stream of server end in server end signal sampling unit, and play stream by first memory cell corresponding to each, all will be with it corresponding respectively first condition code, each sampling instant corresponding with each first condition code that is generated by the first condition code generation unit stored with corresponding to each other; The remote media play signal of current broadcast is sampled at client sampling instant Ts2 ' by the client signal sampling unit, and second condition code that generates by the second condition code generation unit; Then obtain Ts1 of the corresponding server end signal sampling moment of first condition code that is complementary with second condition code in above-mentioned each first condition code by server end sampling instant acquiring unit, and obtain the unit based on server end signal sampling Ts1, client signal sampling instant Ts2 ' and obtain client and server end for the signal time delay Td of same remote media play signal constantly by signal time delay, thereby can realize effectively and exactly detecting the time delay of remote media play signal.
Description of drawings
The block diagram of the detection system of the remote media play signal time delay that Fig. 1 provides for the utility model first embodiment;
The workflow diagram of the detection system of the remote media play signal time delay that Fig. 2 provides for the utility model first embodiment;
The block diagram of the detection system of the remote media play signal time delay that Fig. 3 provides for the utility model second embodiment;
The working timing figure of the detection system of the remote media play signal time delay that Fig. 4 provides for the utility model second embodiment;
The block diagram of the detection system of the remote media play signal time delay that Fig. 5 provides for the utility model the 3rd embodiment;
The working timing figure of the detection system of the remote media play signal time delay that Fig. 6 provides for the utility model the 3rd embodiment;
The working timing figure of the detection system of the remote media play signal time delay that Fig. 7 provides for the utility model the 4th embodiment; And
The block diagram of the detection system of the remote media play signal time delay that Fig. 8 provides for the utility model the 4th embodiment.
Embodiment
For making those skilled in the art understand the technical solution of the utility model better, the detection system of the remote media play signal time delay that the utility model is provided below in conjunction with accompanying drawing is described in detail.For convenience of explanation, among the application, be that benchmark engraves when determined and makes T with the clock signal of server end, be that benchmark engraves when determined and makes T ' with the clock signal of client.And among the application, client comprises the smart machine of any can parsings such as intelligent television, PC, set-top box, mobile phone, panel computer " real time remote multimedia stream signal " (Realtime Remote Multimedia Broadcasting Stream), for ease of describing, " real time remote multimedia stream signal " abbreviated as " remote media play signal ".So-called remote media play signal can comprise the live signal that the various transfer modes such as live signal of live signal, the network delivery of anolog TV signals, digital television signal, set-top box transmission transmit, and the so-called stream of playing can comprise the various channels that can institute's contents such as the live signal that transmits flow such as television channel, radio station (receiving station) channel, network direct broadcasting channel.
See also Fig. 1, the block diagram of the detection system of the remote media play signal time delay that first embodiment of the utility model shown in it provides.In the present embodiment, signal time delay obtains the unit and is arranged on server end.
As shown in Figure 1, the detection system of the remote media play signal time delay in the present embodiment comprises server end 10 and client 20.Server end 10 comprises that server end signal sampling unit 11, the first condition code generation unit 12, first memory cell 13, server end sampling instant acquiring unit 14 and signal time delay obtain unit 15; Client 20 comprises client signal sampling unit 21 and the second condition code generation unit 22.
Wherein, server end signal sampling unit 11 is used for N the remote media play signal of playing each broadcast stream of stream of server end 10 carried out a plurality of samplings, and wherein N is the integer more than or equal to 1.Server end signal sampling unit 11 can be the capture card consistent with being sampled remote media play signal type, for example, when being sampled remote media play signal type and being picture signal and/or audio signal, this capture card can correspondingly be picture signal capture card and/or audio signal sample card.
The first condition code generation unit 12 is used for all generating corresponding first condition code at each sampled data from server end signal sampling unit 11.The data type of first condition code comprises the combination of finger image or audio-frequency fingerprint or finger image and audio-frequency fingerprint.
Client signal sampling unit 21 is used at client sampling instant Ts2 ', and the remote media play signal of client 20 current broadcasts is sampled.Be similar to server end signal sampling unit 11, this client signal sampling unit 21 also can be the capture card consistent with being sampled remote media play signal type.
The second condition code generation unit 22 is used for generating second condition code according to the sampled data from client signal sampling unit 21.The data type of second condition code is consistent with the data type of first condition code.
Server end sampling instant acquiring unit 14 is used for based on the corresponding server end signal sampling of first condition code that obtains to be complementary with it from second condition code of client 20 Ts1 constantly.
Signal time delay obtains unit 15, is used for based on the server end signal sampling moment Ts1, client signal sampling instant Ts2 ', and obtains client 20 and the signal time delay Td of server end 10 for same remote media play signal.
In actual applications, server end sampling instant acquiring unit 14 and signal time delay obtain the equipment that unit 15 can carry out the data processing for microprocessor, CPU, single-chip microcomputer etc.
It is to be noted, first condition code and second condition code all refer to: based on transformed by the picture material in the remote media play signal of the broadcast of being gathered stream and/or audio content obtain, can characterize the characteristics of image of this remote media play signal and/or the numeric data code of audio frequency characteristics, preferably make it have certain antijamming capability, for example, can enough resist the conversion of picture format and audio format, the conversion of antagonism image resolution ratio size etc.
Be understandable that, although the server end sampling instant acquiring unit 14 in the present embodiment is arranged on server end 10, but in actual applications, it also can be arranged on client 20, and based on second condition code be used for obtaining server end signal sampling data constantly from server end 10, the corresponding server end signal sampling of first condition code that acquisition and second condition code are complementary is Ts1 constantly, wherein, comprise each first condition code corresponding with each broadcast stream for the data of obtaining first sampling instant, and each sampling instant corresponding with each first condition code.And, server end sampling instant acquiring unit 14 can comprise to be play the stream identification module and searches the module (not shown), wherein, play the stream identification module and be used for the broadcast traffic identifier that comprises based on second condition code and the broadcast stream that identify customer end 20 is play at client signal sampling instant Ts2 '; Searching module is used for searching each first condition code corresponding with this broadcast stream in the data that first memory cell 13 is stored, and in each first condition code, search first condition code that is complementary with this second condition code, and search the corresponding server end signal sampling of this first condition code Ts1 constantly.
It will also be appreciated that, in actual applications, first communication unit that can communicate with client 20 that can arrange that its each unit shares at server end 10, in the second communication unit that can communicate with server end 10 that client 20 arranges that its each unit shares, and communicating by letter between each unit of each unit of realizing server end 10 by means of first communication unit and second communication unit and client 20; Perhaps, at server end 10 first communication unit that its each unit shares is not set, and in client 20 the second communication unit that its each unit shares is not set, but for each unit of desiring in the server end 10 to communicate with client 20 arranges communication function and these unit are directly communicated with client 20, and communication function is set and the direct and server end 10 in these unit is communicated for each unit of desiring in the client 20 to communicate with server end 10.
Describe the course of work of the detection system of the remote media play signal time delay that the utility model first embodiment provides in detail below in conjunction with Fig. 2.
In server end signal sampling step 110, gather the remote media play signal that each plays stream by server end signal sampling unit 11, sample frame by frame then or key frame is sampled.At this, so-called key frame refers to stable sample frame, and it can resist the change of form or resolution.
In the step 120 that generates first condition code, the first condition code generation unit 12 generates corresponding first condition code according to each frame signal of sampling.
In the step 130 of storage first condition code, by first memory cell 13 each first condition code, each sampling instant and the corresponding broadcast stream corresponding with each first condition code are stored with corresponding to each other.
In client signal sampling step 140, by client signal sampling unit 21 at the Ts2 ' of client clock signal indication constantly, the remote media play signal of client 20 current broadcasts is sampled.The sample mode that is appreciated that client 20 need be consistent with server end 10, and for example, when server end 10 adopted the key frame sampling, client 20 also should be used the key frame sampling synchronously.
In the step 150 that generates second condition code, generate the second corresponding condition code by the second condition code generation unit 22.
In the step 160 of obtaining the server end sampling instant, set up server end 10 and 20 bipartite connections of client, and the corresponding server end signal sampling of first condition code that obtains to be complementary with it based on second condition code by server end sampling instant acquiring unit 14 Ts1 constantly.
Particularly, at first, by client 20 second condition code is sent to server end 10; Then, by server end 10 based on the broadcast traffic identifier that comprises in second condition code and the broadcast that identify customer end 20 is play at client signal sampling instant Ts2 ' stream; At last, by searching first condition code and the Ts1 of the corresponding server end signal sampling moment of this first condition code that is complementary with this second condition code in server end 10 each first condition code corresponding with this broadcast stream that store at it.Perhaps, be sent to client 20 with what store for obtaining server end signal sampling data constantly by server end 10, wherein, be used for obtaining server end signal sampling data constantly and comprise each first condition code corresponding with each broadcast stream, each sampling instant corresponding with each first condition code; Then, by client 20 based on the broadcast traffic identifier that comprises in second condition code and the broadcast that identify customer end 20 is play at client signal sampling instant Ts2 ' stream; At last, in server end 10 each first condition codes corresponding with this broadcast stream that store, search first condition code and the Ts1 of the corresponding server end signal sampling moment of this first condition code that is complementary with this second condition code by client 20.
Obtain in the step 170 at signal time delay, obtain unit 15 based on the server end signal sampling moment Ts1, client signal sampling instant Ts2 ' by signal time delay, and obtain client 20 and the signal time delay Td of server end 10 for same remote media play signal.
It is to be noted, because the clock signal of client 20 and server end 10 is often asynchronous, therefore just need clock reference converting unit (not shown) be set in client 20 or server end 10, and determine with client 20 still be the clock signal of server end 10 be benchmark, in order to obtain remote media play signal time delay Td based on the server end signal sampling moment and the client signal sampling instant corresponding to reference clock.Particularly, when the clock signal with server end 10 is reference clock signal, the clock reference converting unit is converted to the indicated client sampling instant Ts2 of corresponding server end clock signal with it with client signal sampling instant Ts2 ', and signal time delay obtains unit 15 based on formula Td=Ts2-Ts1 and picked up signal time delay Td; Perhaps when the clock signal with client 20 is reference clock signal, the clock reference converting unit is converted to the indicated server end sampling instant Ts1 ' of clients corresponding clock signal with it with server end signal sampling moment Ts1, and signal time delay obtains unit 15 based on formula Td=Ts2 '-Ts1 ' and picked up signal time delay Td.
It is pointed out that also above-mentioned first condition code is consistent with the data type of second condition code, and data type comprises the combination of finger image or audio-frequency fingerprint or finger image and audio-frequency fingerprint.That is to say, above-mentioned sampled signal can be vision signal or audio signal, also the combination of the two can be, as long as it is consistent with the signal type that second condition code adopts to guarantee to generate first condition code, and continuous sampling need be carried out for audio signal.
In addition, when there is network delay in the transmission of the network between client 20 and the server end 10, the detection system of this remote media play signal time delay also need arrange network delay computing unit (not shown) at server end 10 or client 20, is used for the network delay of the transfer of data between calculation server end 10 and the client 20.In addition, in order to reduce flow, only switch in client 20 and (for example play stream, for TV signal, only at switching TV channel) time, the detection system of remote media play signal time delay is just worked, i.e. and client signal sampling instant Ts2 ' switches the moment of playing stream corresponding to client 20.
It is pointed out that further the data connection request between server end 10 and the client 20 can be initiated by the either party in the two.And in the computational process of signal time delay Td, any one party in server end 10 and the client 20 can be as calculating side.When server end 10 during for calculatings side (that is, remote media play signal time delay Td calculates and obtains at server end 10), by client 20 to the required data of server end 10 transmission calculating signal time delay Td; When client 20 during for calculatings side (that is, remote media play signal time delay Td calculates and obtains in client 20), by server end 10 to the required data of client 20 transmission calculating signal time delay Td.
See also Fig. 3, the block diagram of the detection system of the remote media play signal time delay that second embodiment of the utility model shown in it provides.In the present embodiment, the remote media play signal is TV signal, plays stream and is television channel, and be reference clock signal with the clock signal of server end, and signal time delay obtains the unit and is arranged on server end.
In the present embodiment, the detection system of remote media play signal time delay comprises server end 10 and client 20.Wherein, server end 10 comprises that server end signal sampling unit 11, the first condition code generation unit 12, first memory cell 13, server end sampling instant acquiring unit 14, signal time delay obtain unit 15, first communication unit 16, clock reference converting unit 17 and network delay computing unit 18, and server end sampling instant acquiring unit 14 comprises broadcast stream identification module 141 and searches module 142; Client 20 comprises client signal sampling unit 21, the second condition code generation unit 22, second memory cell 23 and second communication unit 26.Wherein, first communication unit 16 and second communication unit 26 can adopt existing any suitable wired or wireless communication transport module to realize.The function class of other each unit and module is similar to aforementioned in conjunction with Fig. 1 illustration, does not repeat them here.
Describe the course of work of the detection system of the remote media play signal time delay that present embodiment provides in detail below in conjunction with Fig. 4.
As shown in Figure 3 and Figure 4, at node S21, client 20 sends connection request via its second communication unit 26 to server end 10.
At node S22, server end 10 receives the connection request from client 20, writes down the indicated moment T1 of current server end clock signal, and returns the affirmation signal of accepting connection request to client 20 via first communication unit 16.
At node S23, server end signal sampling unit 11 is in the indicated Ts1 moment of server end clock signal, TV signal to N channel is carried out a plurality of samplings, and wherein N is the integer more than or equal to 1, then sampled data is sent to the first condition code generation unit 12.
The first condition code generation unit 12 all generates corresponding first condition code at each sampling, and sends it to first memory cell 13.
At node S24, client 20 is delayed during through dt_s2c from moment T1, receives connection confirmation signal from server end 10 by its second communication unit 26.
Client signal sampling unit 21 is sampled to the TV signal of client 20 current broadcasts, and sampled data is sent to the second condition code generation unit 22 at the indicated Ts2 ' of client clock signal constantly.
The second condition code generation unit 22 generates second condition code according to the sampled data from client signal sampling unit 21, and second condition code and clients corresponding sampling instant Ts2 ' are sent to second memory cell 23.
At node S25, client 20 was delayed when Ts2 ' is through dt1 from the moment, by second communication unit 26 data such as second condition code and dt1 was sent to server end 10.
At node S26, server end 10 is delayed when server end 10 sends data such as second condition code and dt1 through dt_c2s from client 20, receive data such as second condition code and dt1 by first communication unit 16, and the indicated moment T2 of record current server end clock signal.
Broadcast stream identification module 141 in the server end sampling instant acquiring unit 14, based on second condition code and utilize the station symbol recognition technology of television channel to identify the television channel that client 20 is play at client signal sampling instant Ts2 ', and recognition result is sent to searches module 142.Search module 142 comparing with corresponding each first condition code of this television channel storage in second condition code and first memory cell 13, search first condition code that is complementary, and after finding first condition code that is complementary, further search the server end signal sampling corresponding with this first condition code Ts1 constantly, then Ts1 is sent to signal time delay and obtains unit 15.
Signal time delay obtains unit 15 and calculates client 20 and the signal time delay Td=Ts2-Ts1=T1/2+T2/2-dt1/2-Ts1 of server end 10 with respect to same TV signal based on Ts1, T1, T2 and dt1.
The concrete computational process of signal time delay Td is as follows:
At first, computing network time delay.For convenience of explanation and calculate, in the present embodiment, suppose that the network delay dt_c2s that client 20 arrives server end 10 equates with the network delay dt_s2c of server end 10 to client 20, and represent with dt_c2s.
dt_c2s＝(T2-T1-dt1)/2
Then, the client clock signal is indicated client sampling instant Ts2 ' is converted to the indicated client sampling instant Ts2 of corresponding server end clock signal with it.Conversion method one according to formula Ts2=T2-dt_c2s-dt1, obtains Ts2=T1/2+T2/2-dt1/2; Conversion method two according to formula Ts2=T1+dt_c2s, obtains Ts2=T1/2+T2/2-dt1/2.
At last, obtain client 20 and the signal time delay Td of server end 10 with respect to same TV signal based on Ts1 and Ts2, wherein, Td=Ts2-Ts1=T1/2+T2/2-dt1/2-Ts1.
Certainly, also can utilize formula Td=dt_c2s-(Ts1-T1) computing client end 20 and the signal time delay Td of server end 10 with respect to same TV signal, can obtain signal time delay Td=T1/2+T2/2-dt1/2-Ts1 equally.
See also Fig. 5, the block diagram of the detection system of the remote media play signal time delay that the 3rd embodiment of the utility model shown in it provides.In the present embodiment, so-called remote media play signal is TV signal, and the so-called stream of playing is television channel, and is reference clock signal with the clock signal of server end, and signal time delay obtains the unit and is arranged on client.
In the present embodiment, the detection system of remote media play signal time delay comprises server end 10 and client 20.Wherein, server end 10 comprises server end signal sampling unit 11, the first condition code generation unit 12, first memory cell 13, server end sampling instant acquiring unit 14 and first communication unit 16, and server end sampling instant acquiring unit 14 comprises broadcast stream identification module 141 and searches module 142; Client 20 comprises that client signal sampling unit 21, the second condition code generation unit 22, second memory cell 23, signal time delay obtain unit 15, second communication unit 26, clock reference converting unit 27 and network delay computing unit 28.The function class of each unit and module is similar to aforementioned in conjunction with Fig. 1 and Fig. 3 illustration, does not repeat them here.Describe the course of work of the detection system of the remote media play signal time delay that present embodiment provides in detail below in conjunction with Fig. 6.
As shown in Figure 5 and Figure 6, at node S31, sampled to the TV signal of each channel, and sampled data transferred to the first condition code generation unit 12 in the indicated Ts1 moment of server end clock signal in server end signal sampling unit 11.
The first condition code generation unit 12 is converted into corresponding first condition code with each frame signal, and with each first condition code, corresponding server end sampling time Ts1 and corresponding channel transmission to the first memory cell 13.
At node S32, client signal sampling unit 21 is sampled to the TV signal of client 20 current broadcasts, and sampled data is transferred to the second condition code generation unit 22 at the indicated Ts2 ' of client clock signal constantly.
The second condition code generation unit 22 generates the second corresponding condition code according to the sampled data from client signal sampling unit 21, and sampling instant Ts2 ' and second condition code are transferred to second memory cell 23.
At node S33, client 20 was delayed when Ts2 ' is through dt1 from the moment, sent connection requests by second communication unit 26 to server end 10.
At node S34, server end 10 is delayed when client 20 sends connection request through dt_c2s, receive this connection request by first communication unit 16, record the indicated moment T1 of current server end clock signal, and return the affirmation signal of accepting connection request to client 20 by first communication unit 16.
At node S35, client 20 is delayed during through dt_s2c from moment T1, receive connection confirmation signal from server end 10 by second communication unit 26, and pass through second communication unit 26 to server end 10 transmissions second condition code, and calculate signal time delay Td desired datas to server end 10 requests.
At node S36, server end 10 is delayed when client 20 sends request of data through dt_c2s, receives second condition code and this request of data by first communication unit 16, the indicated moment T2 of record current server end clock signal.
Broadcast stream identification module 141 in the server end sampling instant acquiring unit 14, based on second condition code and utilize the station symbol recognition technology of television channel to identify the television channel that client 20 is play at client signal sampling instant Ts2 ', and recognition result is sent to searches module 142.Search module 142 with comparing with corresponding each first condition code of this television channel in second condition code and first memory cell 13, search first condition code that is complementary and the server end signal sampling corresponding with this first condition code Ts1 constantly.And server end 10 sends to client 20 by first communication unit 16 with data such as sampling time Ts1, T1 and T2.
At node S37, client 20 is delayed during through dt_s2c from moment T2, receives from data such as Ts1, the T1 of server end 10 and T2 by second communication unit 26.
In client 20, network delay computing unit 28 is by calculating network delay dt_c2s=(T2-T1)/2; Clock reference converting unit 27 is according to formula Ts2=T1-dt_c2s-dt1, and the client sampling instant Ts2 ' that the client clock signal is indicated is converted to the indicated client sampling instant Ts2 of corresponding server end clock signal with it; Signal time delay obtains unit 16 and obtains signal time delay Td=3T1/2-T2/2-dt1-Ts1 according to data such as T1, T2, dt1 and Ts1.
At node S38, client 20 sends signal time delay Td by second communication unit 26 to server end 10, in order to server end 10 follow-up uses.
So-called follow-up use comprises to television set, set-top box or PC application program and some application that are associated with TV signal of embedding during WEB uses etc.For example, server end 10 can be set the time that sends advertisement to client 20 according to this signal time delay Td.
Describe the detailed process of calculating signal time delay Td in the present embodiment below in detail.
At first, computing network time delay.For convenience of explanation and calculate, adopt and be similar to the described method of aforementioned second embodiment and obtain network delay dt_c2s=(T2-T1)/2.
Then, the client sampling instant Ts2 ' that the client clock signal is indicated is converted to the indicated client sampling instant Ts2 of corresponding server end clock signal with it, specifically can adopt formula Ts2=T1-dt_c2s-dt1 to realize this conversion.
At last, obtain client 20 and the signal time delay Td of server end 10 with respect to same TV signal based on Ts1 and Ts2, wherein, Td=Ts2-Ts1=3T1/2-T2/2-dt1-Ts1.
Certainly, also can utilize formula Td=T1-Ts1-dt_c2s-dt1 to come computing client end 20 and the signal time delay Td of server end 10 with respect to same TV signal, can obtain signal time delay Td=3T1/2-T2/2-dt1-Ts1 equally.
The course of work of the detection system of the remote media play signal time delay that present embodiment provides is not limited to shown in the aforementioned sequential chart, but can adjust work schedule according to actual needs.For example, the detection system of the remote media play signal time delay that provides of present embodiment also can be according to sequential working shown in Figure 7.
As Fig. 5 and shown in Figure 7, at node S41, sampled to the TV signal of each channel, and sampled data transferred to the first condition code generation unit 12 in the indicated Ts1 moment of server end clock signal in server end signal sampling unit 11.
The first condition code generation unit 12 is converted into corresponding first condition code with each frame signal, and with each first condition code, corresponding server end sampling time Ts1 and corresponding channel transmission to the first memory cell 13.
At node S42, client signal sampling unit 21 is sampled to the TV signal of client 20 current broadcasts, and sampled data is transferred to the second condition code generation unit 22 at the indicated Ts2 ' of client clock signal constantly.
The second condition code generation unit 22 generates the second corresponding condition code according to the sampled data from client signal sampling unit 21, and sampling instant Ts2 ' and second condition code are transferred to second memory cell 23.
At node S43, server end 10 is delayed during through dt1 from moment Ts1, sends connection requests by first communication unit 16 to client 20, and the indicated moment T3 of record current server end clock signal.
At node S44, client 20 is delayed when server end 10 sends connection request through dt_s2c, receive this connection request by second communication unit 26, record the indicated moment T1 ' of active client clock signal, and return the affirmation signal of accepting connection request to server end 10.
At node S45, server end 10 receives connection confirmation signal from client 20 by first communication unit 16 after T1 ' constantly is through time delay dt_c2s, and to client 20 transmission request of data.
At node S46, client 20 is delayed when server end 10 sends request of data through dt_s2c, receive this request of data by second communication unit 26, the indicated moment T2 ' of record active client clock signal, and by second communication unit 26 second condition code is sent to server end 10, and calculate signal time delay Td desired datas to server end 10 requests.
At node S47, when moment T2 ' process dt_c2s, delay, server end 10 receives second condition code and this request of data, utilization is similar to method among the node S26 of above-mentioned second embodiment and determines first condition code that is complementary with this second condition code and the corresponding server end signal sampling of this first condition code Ts1 constantly, and data such as T3, dt1 and sampling time Ts1 are sent to client 20.
At node S48, client 20 is delayed when server end 10 sends data such as T3, dt1 and sampling time Ts1 through dt_c2s, client 20 receives the data from server end 10, and calculate client 20 and the signal time delay Td of server end 10 with respect to same TV signal based on Ts1, T3, dt1 and Ts2 ', then client 20 is sent to server end 10 with signal time delay Td data, for server end 10 follow-up uses.
Describe the detailed process of calculating signal time delay Td in the present embodiment below in detail.
At first, computing network time delay.For convenience of explanation and calculate, network delay computing unit 28 adopts and is similar to the described method of aforementioned second embodiment and obtains network delay dt_c2s=(T2 '-T1 ')/2.
Then, clock reference converting unit 27 is utilized formula T3 '=T1 '-dt_s2c, and the moment T3 that the server end clock signal is indicated is converted to the indicated moment T3 ' of clients corresponding clock signal with it.
Afterwards, clock reference converting unit 27 is utilized formula T3 '-Ts1 '=T3-Ts1, and the client sampling instant Ts1 that the server end clock signal is indicated is converted to the indicated client sampling instant Ts1 ' of clients corresponding clock signal with it.
At last, signal time delay obtains unit 16 based on Td=Ts2 '-Ts1 ', obtains client 20 and the signal time delay Td of server end 10 with respect to same TV signal.
Be understandable that the connection between client 20 and the server end 10 can be before 10 pairs of remote media play signal samplings of client 20 and server end, set up afterwards or simultaneously.And in actual applications, also can exist to 20 samplings of same remote media play signal client preceding, server end 10 samplings after situation, the detection method of signal time delay Td in this case is similar to previous embodiment, does not repeat them here.
See also Fig. 8, the block diagram of the detection system of the remote media play signal time delay that the 4th embodiment of the utility model shown in it provides.In the present embodiment, so-called remote media play signal is TV signal, and the so-called stream of playing is television channel, and is reference clock signal with the clock signal of server end, and signal time delay obtains the unit and is arranged on client.
In the present embodiment, the detection system of remote media play signal time delay comprises server end 10 and client 20.Wherein, server end 10 comprises server end signal sampling unit 11, the first condition code generation unit 12, first memory cell 13 and first communication unit 16; Client 20 comprises that client signal sampling unit 21, the second condition code generation unit 22, second memory cell 23, server end sampling instant acquiring unit 24, signal time delay obtain unit 25, second communication unit 26, clock reference converting unit 27 and network delay computing unit 28, and server end sampling instant acquiring unit 24 comprises broadcast stream identification module 241 and searches module 242.The function class of each unit and module is similar to aforementioned in conjunction with Fig. 1, Fig. 3 and Fig. 5 illustration, does not repeat them here.
The course of work of the detection system of the remote media play signal time delay that present embodiment provides is similar to the detection system among aforementioned the 3rd embodiment, thereby also can finish the testing of signal time delay according to sequential shown in Figure 6, just the detection system in the present embodiment is slightly different in the action of node S35 to S37 with detection system among aforementioned the 3rd embodiment, only these three nodes is elaborated at this.
In the present embodiment, at node S35, client 20 is delayed during through dt_s2c from moment T1, receives connection confirmation signal from server end 10 by second communication unit 26, and calculates signal time delay Td desired datas to server end 10 requests.
At node S36, server end 10 is delayed when client 20 sends request of data through dt_c2s, receive this request of data by first communication unit 16, record the indicated moment T2 of current server end clock signal, and each first condition code, corresponding server end sampling time Ts1 and the data such as corresponding channel, T1 and T2 of storing in first memory cell 13 are sent to client 20.
At node S37, client 20 is delayed during through dt_s2c from moment T2, receive each first condition code, corresponding server end sampling time Ts1 and the data such as corresponding channel, T1 and T2 of storing in first memory cell 13 from server end 10 by second communication unit 26
In client 20, broadcast stream identification module 241 in the server end sampling instant acquiring unit 24, based on second condition code and utilize the station symbol recognition technology of television channel to identify the television channel that client 20 is play at client signal sampling instant Ts2 ', and recognition result is sent to searches module 242.Search module 242 with comparing with corresponding each first condition code of this television channel of storing in second condition code and first memory cell 13, search first condition code that is complementary and the server end signal sampling corresponding with this first condition code Ts1 constantly.
Network delay computing unit 28 is by calculating network delay dt_c2s=(T2-T1)/2; Clock reference converting unit 27 is according to formula Ts2=T1-dt_c2s-dt1, and the client sampling instant Ts2 ' that the client clock signal is indicated is converted to the indicated client sampling instant Ts2 of corresponding server end clock signal with it; Signal time delay obtains unit 25 and obtains signal time delay Td=3T1/2-T2/2-dt1-Ts1 according to data such as T1, T2, dt1 and Ts1.
Be understandable that, although the course of work of the detection system of the remote media play signal time delay that the front provides the utility model first to fourth embodiment in conjunction with Fig. 4 and sequential chart shown in Figure 6 has been described in detail, but in actual applications, the course of work of the detection system of remote media play signal time delay is not limited to shown in the aforementioned sequential chart, but can adjust work schedule according to actual needs.
Will also be appreciated that above execution mode only is the illustrative embodiments that adopts for principle of the present utility model is described, yet the utility model is not limited thereto.For those skilled in the art, under the situation that does not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also should be comprised in the protection range of the present utility model.
Claims (10)
1. the detection system of a remote media play signal time delay is characterized in that comprising:
Server end signal sampling unit is used for N the remote media play signal of playing each broadcast stream of stream of server end carried out a plurality of samplings, and wherein N is the integer more than or equal to 1;
The first condition code generation unit is used for all generating corresponding first condition code at each sampled data from server end signal sampling unit;
First memory cell is used for playing stream corresponding to each, will with corresponding respectively first condition code of this broadcasts stream, and corresponding each sampling instant of each first condition code store with corresponding to each other;
The client signal sampling unit is used at client sampling instant Ts2 ', and the remote media play signal of the current broadcast of client is sampled;
The second condition code generation unit is used for generating second condition code according to the sampled data from the client signal sampling unit;
Server end sampling instant acquiring unit is used for the Ts1 of the corresponding server end signal sampling moment of first condition code that obtains to be complementary with it based on described second condition code; And
Signal time delay obtains the unit, is used for based on described server end signal sampling Ts1, described client signal sampling instant Ts2 ' constantly, and obtains client and server end for the signal time delay Td of same remote media play signal.
2. the detection system of remote media play signal time delay according to claim 1 is characterized in that, described server end sampling instant acquiring unit comprises to be play the stream identification module and search module, wherein
Described broadcast stream identification module is used for the broadcast traffic identifier that comprises based on described second condition code and the broadcast stream that identify customer end is play at described client signal sampling instant Ts2 '; And
The described module of searching flows each corresponding first condition code for searching in the data of described first cell stores with this broadcast, and searches first condition code and the Ts1 of the corresponding server end signal sampling moment of this first condition code that is complementary with described second condition code in described each first condition code.
3. the detection system of remote media play signal time delay according to claim 1, it is characterized in that, described server end sampling instant acquiring unit is arranged on server end, and based on the corresponding server end signal sampling of first condition code that obtains to be complementary with it from described second condition code of client Ts1 constantly.
4. the detection system of remote media play signal time delay according to claim 1, it is characterized in that, described server end sampling instant acquiring unit is arranged on client, and based on being used for obtaining server end signal sampling data and described second condition code constantly from server end, the corresponding server end signal sampling of first condition code that acquisition and described second condition code are complementary is Ts1 constantly, and flow corresponding respectively first condition code described comprising with each broadcast be used to the data of obtaining the server end signal sampling moment, each sampling instant corresponding with each first condition code.
5. the detection system of remote media play signal time delay according to claim 1, it is characterized in that also comprising the clock reference converting unit, it is arranged on server end or client, be used for when the clock signal with server end is reference clock signal, client signal sampling instant Ts2 ' is converted to the indicated client sampling instant Ts2 of corresponding server end clock signal with it, and based on formula Td=Ts2-Ts1 and picked up signal time delay Td; Perhaps when the clock signal with client is reference clock signal, with the server end signal sampling constantly Ts1 be converted to the indicated server end sampling instant Ts1 ' of clients corresponding clock signal with it, and based on formula Td=Ts2 '-Ts1 ' and picked up signal time delay Td.
6. the detection system of remote media play signal time delay according to claim 5, it is characterized in that also comprising the network delay computing unit, be used for when there is network delay in the transfer of data between server end and the client, calculating this network delay, and described network delay is rejected in described signal time delay acquisition unit when calculating described signal time delay.
7. the detection system of remote media play signal time delay according to claim 1, it is characterized in that, described first condition code is consistent with the data type of second condition code, and described data type comprises the combination of finger image or audio-frequency fingerprint or finger image and audio-frequency fingerprint.
8. the detection system of remote media play signal time delay according to claim 1 is characterized in that, described server end signal sampling unit and described client signal sampling unit are image data acquiring card and/or audio data collecting card.
9. the detection system of remote media play signal time delay according to claim 1 is characterized in that, described client sampling instant Ts2 ' switches the moment of playing stream corresponding to client.
10. the detection system of remote media play signal time delay according to claim 1 is characterized in that, described client comprises intelligent television, PC, set-top box, mobile phone or panel computer for resolving the smart machine of remote media play signal.
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| CN 201320036591 CN203151681U (en) | 2013-01-21 | 2013-01-21 | Detection system for remote media playing signal time delay |
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| CN 201320036591 CN203151681U (en) | 2013-01-21 | 2013-01-21 | Detection system for remote media playing signal time delay |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103139608A (en) * | 2013-01-21 | 2013-06-05 | 北京十分科技有限公司 | Remote media playing signal time delay test method and test system |
| CN109982143A (en) * | 2017-12-28 | 2019-07-05 | 中国移动通信集团陕西有限公司 | A kind of method, apparatus, medium and the equipment of determining video playing time delay |
-
2013
- 2013-01-21 CN CN 201320036591 patent/CN203151681U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103139608A (en) * | 2013-01-21 | 2013-06-05 | 北京十分科技有限公司 | Remote media playing signal time delay test method and test system |
| CN109982143A (en) * | 2017-12-28 | 2019-07-05 | 中国移动通信集团陕西有限公司 | A kind of method, apparatus, medium and the equipment of determining video playing time delay |
| CN109982143B (en) * | 2017-12-28 | 2021-04-23 | 中国移动通信集团陕西有限公司 | Method, device, medium and equipment for determining video playing time delay |
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