CN103051861A - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN103051861A CN103051861A CN2013100281119A CN201310028111A CN103051861A CN 103051861 A CN103051861 A CN 103051861A CN 2013100281119 A CN2013100281119 A CN 2013100281119A CN 201310028111 A CN201310028111 A CN 201310028111A CN 103051861 A CN103051861 A CN 103051861A
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Abstract
The invention discloses a data transmission method. The data transmission method comprises the following steps of: receiving a first signal carried with a time division multiplexing frame, wherein the time division multiplexing frame at least comprises a frame synchronization signal subframe, an audio data subframe and a video data subframe; when the time division multiplexing frame completely receives the first signal, acquiring a second signal carried with the time division multiplexing frame according to the first signal, wherein the second signal is different from the first signal in frequency; and sending the second signal. The data transmission method provided by the embodiment of the invention can be used for transmitting the time division multiplexing frame at different frequencies and transmitting the voices and videos at different time slots through the time division multiplexing frame, thereby lengthening the transmission distances of the voices and the videos and enlarging the usable range of a visible interphone.
Description
Technical field
The application relates to communication technical field, particularly relates to a kind of data transmission method and device.
Background technology
At present, in the environment without public network, for realizing instant messaging, generally adopt talkback system.And in order to satisfy emergency communication and industry user to the demand of visual command scheduling, a kind of support sound, the wireless hand-held intercom (hereinafter to be referred as video intercom) of transmission of video arises at the historic moment, but the signal effective propagation path of present video intercom is generally in 1 ~ 3 kilometer range, when the distance between the video intercom surpasses the signal effective communication distance of video intercom, can't communicate between the video intercom, limited the scope of application of video intercom, therefore, the scope of application that how to enlarge video intercom becomes problem demanding prompt solution.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of data transmission method, to enlarge the scope of application of video intercom.
Technical scheme is as follows:
A kind of data transmission method is used for the communication between the video intercom, comprising:
Reception carries the first signal of time division multiplexing frame, and described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
When described time division multiplexing frame finishes receiving, obtain the secondary signal that carries described time division multiplexing frame according to described first signal, the frequency of described secondary signal is different from the frequency of described first signal;
Send described secondary signal.
Said method, preferred, the voice data that transmits in the described voice data subframe is the voice data that the first video intercom sends, the video data that transmits in the described video data subframe is the video data that the second video intercom sends.
Said method, preferred, determine according to following manner whether described time division multiplexing frame finishes receiving:
The identification frame synchronizing signal is determined the time that described time division multiplexing frame begins to transmit;
Frame length according to described time division multiplexing frame determines whether described time division multiplexing frame finishes receiving.
Said method, preferred, the described first signal of described foundation obtains the secondary signal that carries described time division multiplexing frame and comprises:
Described first signal is carried out frequency inverted, obtain secondary signal.
Said method, preferred, the first signal that described reception carries the time division multiplexing frame comprises:
Each channel of periodic scan;
The first receiver is switched to the channel of signal transmission, the first signal that is transmitted to receive this channel.
A kind of data transmission method for uplink is applied to video intercom, comprising:
Image data; Described data comprise voice data or video data or the combination of the two;
Be the time division multiplexing frame with described data encapsulation; Described time division multiplexing frame comprises the frame synchronizing signal subframe, voice data subframe, and video data subframe;
The first signal that carries described time division multiplexing frame is sent by predetermined channel.
A kind of data receive method is applied to video intercom, comprising:
Each channel of periodic scan;
The second receiver is switched to the channel of signal transmission, to receive the signal of this transmission;
Show the video information in the signal that receives.
A kind of data transmission device comprises:
The 3rd receiver is used for receiving the first signal that carries the time division multiplexing frame, and described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
Frequency converter is used for obtaining the secondary signal that carries described time division multiplexing frame according to described first signal when described time division multiplexing frame finishes receiving, and the frequency of described secondary signal is different from the frequency of described first signal;
Transmitter is used for sending described secondary signal.
Said apparatus, preferred, described the 3rd receiver comprises:
Scanning element, switch unit and receiving element, wherein:
Scanning element is used for each channel of periodic scan;
Switch unit is used for described receiving element is switched to the channel that signal transmits, the first signal that is transmitted to receive this channel, described first signal carries the time division multiplexing frame, described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
Receiving element is used for receiving described first signal.
Said apparatus, preferred, described frequency converter comprises:
Recognition unit is used for the identification frame synchronizing signal, determines the time that described time division multiplexing frame begins to transmit;
Determining unit is used for determining according to the frame length of described time division multiplexing frame whether described time division multiplexing frame finishes receiving;
Converting unit is used for when described time division multiplexing frame finishes receiving described first signal being carried out frequency inverted, obtains secondary signal.
A kind of data sending device is applied to video intercom, comprising:
Acquisition module is used for image data; Described data comprise voice data or video data or the combination of the two;
Package module, being used for described data encapsulation is the time division multiplexing frame; Described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
Sending module sends by predetermined channel for the first signal that will carry described time division multiplexing frame.
A kind of data sink is applied to video intercom, comprising:
Scan module, handover module, receiver module and display module; Wherein,
Scan module is used for each channel of periodic scan;
Handover module is used for the second receiver is switched to the channel of signal transmission, so that described receiver module receives the signal of this transmission;
Display module shows for the video information of the signal that receiver module is received.
Use a kind of data transmission method that the embodiment of the present application provides, receive the first signal that carries the time division multiplexing frame, described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe; When described time division multiplexing frame finishes receiving, obtain the secondary signal that carries described time division multiplexing frame according to first signal, the frequency of described secondary signal is different from the frequency of described first signal; Send described secondary signal.
Hence one can see that, the data transmission method that the embodiment of the present application provides, the time division multiplexing frame that the first intercom is sent sends with different frequency, and described time division multiplexing frame sends voice and video with different time slots, increase the transmission range of voice and video, enlarged the scope of application of intercom.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, the accompanying drawing that the following describes only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of a kind of data transmission method that Fig. 1 provides for the embodiment of the present application;
The frame format schematic diagram of the time division multiplexing frame that the intercom that Fig. 2 provides for the embodiment of the present application sends;
The flow chart of a kind of data transmission method for uplink that Fig. 3 provides for the embodiment of the present application;
The flow chart of a kind of data receive method that Fig. 4 provides for the embodiment of the present application;
The structural representation of a kind of data transmission device that Fig. 5 provides for the embodiment of the present application;
The structural representation of the another kind of data transmission device that Fig. 6 provides for the embodiment of the present application;
The structural representation of a kind of data sending device that Fig. 7 provides for the embodiment of the present application;
The structural representation of a kind of data sink that Fig. 8 provides for the embodiment of the present application;
The structural representation of a kind of data transmission system that Fig. 9 provides for the embodiment of the present application;
The structural representation of the another kind of wireless communication system that Figure 10 provides for the embodiment of the present application;
The theory diagram of the data transmission device that Figure 11 provides for the embodiment of the present application.
For illustrated simple and clear, above accompanying drawing shows the common form of structure, and for fear of unnecessary fuzzy the present invention, can omit description and the details of known features and technology.In addition, the unit in the accompanying drawing is unnecessary proportionally draws.For example, can be with respect to the size of some unit in other unit enlarged drawings, thus help better to understand embodiments of the invention.Same numeral in the different accompanying drawings represents identical unit.
Embodiment
In order to make those skilled in the art person understand better the application's scheme.Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all should belong to the scope of the application's protection.
A kind of data transmission method that the embodiment of the present application provides is applied to the communication between the video intercom, and please referring to Fig. 1, the flow chart of a kind of data transmission method that Fig. 1 provides for the embodiment of the present application comprises:
Step S101: receive the first signal that carries the time division multiplexing frame, described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
In this step, the frame format of described time division multiplexing frame as shown in Figure 2, it comprises three parts at least: frame synchronizing signal subframe, voice data subframe, and video data subframe; Wherein, each subframe is by different slot transmission, the first time slot (being the frame synchronizing signal subframe) is used for the transmission frame synchronizing signal, and the second time slot (being the voice data subframe) is used for the transmission of audio data, and the 3rd time slot (being the video data subframe) is used for transmitting video data;
Preferably, receive and send the switching between two states in order to guarantee video intercom, also be provided with the protection interval between the adjacent sub-frame, wherein, can not protect the interval between frame synchronizing signal subframe and the voice data subframe.
For example, when the video data in the time division multiplexing frame and voice data are during from different video intercom, for example, video data is from the first intercom, and voice data is from the second intercom, so, for the first intercom, video data is the transmission state, voice data then is accepting state, arranges between voice data and the video data so that the protection interval can guarantee that the first video intercom receives voice data and to the switching between the transmission two states of video data; Provide the time enough interval can also guarantee the largest coverage distance of system.The concrete time interval can be rule of thumb or actual applicable cases determine.
Preferably, the duration of described the 3rd time slot is greater than the duration of described the second time slot; The frame length of described time division multiplexing frame can be 20ms, can certainly suitably adjust according to practical situations, is not specifically limited here.
Use described time division multiplexing transmission frame number according to the time, time division multiplexing frame can a transmitting video data (this moment, the speech data subframe be sky), also can a transmission of audio data (this moment, the video data subframe be empty), certainly, can also while transmitting video data and voice data; In the time division multiplexing frame, the sending order of voice data and video data is pre-set, but no matter be the sort of data transfer mode, transmission frame synchronizing signals at first all, and then send voice data and video data, that is to say, when receiving the time division multiplexing frame, what receive first is frame synchronizing signal, in order to determine whether to carry out the sending and receiving switching of signal according to described frame synchronizing signal.
With described time division multiplexing transmission frame number according to the time, in the same time division multiplexing frame, what described voice data subframe and described video data subframe were transmitted can be voice data and the video data of same video intercom transmission, certainly, also can be voice data and the video data that different video intercoms transmits, be that voice data in the speech data subframe comes from the first video intercom, and the video data in the video data subframe come from the second intercom.For example, detect the synchronizing signal of the first video intercom when the second video intercom, and after synchronous with it, the time division multiplexing frame that the first video intercom sends is detected, if only have frame synchronizing signal subframe and voice data subframe in the time division multiplexing frame that the first video intercom sends, and the video data subframe is idle, and then the second video intercom can send video data in the video data subframe of free time.
Need to prove, described time division multiplexing frame is baseband signal, and described first signal is for to modulate later signal to described baseband signal.
Step S102: judge whether described time division multiplexing frame finishes receiving, if so, execution in step S103 then, otherwise, continue to receive described first signal.
Preferably, can determine whether described time division multiplexing frame finishes receiving according to the frame length of described frame synchronizing signal and described time division multiplexing frame, specifically can comprise: the identification frame synchronizing signal, determine the time that described time division multiplexing frame begins to transmit, that is to say, when receiving frame synchronizing signal, illustrate to have begun to receive the time division multiplexing frame; Frame length according to described time division multiplexing frame determines whether described time division multiplexing frame finishes receiving, namely, just can determine the time point that the reception of time division multiplexing frame finishes according to the frame length of time division multiplexing frame, also be in other words, when receiving frame synchronizing signal, the beginning timing when the timing duration reaches the frame length of time division multiplexing frame, illustrates that described time division multiplexing frame finishes receiving.When a time division multiplexing frame finishes receiving, execution in step S103.
Step S103: obtain the secondary signal that carries described time division multiplexing frame according to described first signal, the frequency of described secondary signal is different from the frequency of described first signal;
When described time division multiplexing frame finishes receiving, switch to data transmission modes, and described first signal is converted to secondary signal;
Concrete, when obtaining described secondary signal, following dual mode can be arranged:
Mode 1: described first signal is carried out demodulation, obtain described time division multiplexing frame, described time division multiplexing frame is baseband signal, and described baseband signal is modulated with the frequency that is different from described first signal, obtains secondary signal.
Mode 2: directly to shown in first signal carry out frequency-conversion processing, namely described first signal is carried out frequency translation, comprising:
Obtain local oscillation signal, described local oscillation signal is mixed with described first signal, obtain some mixed signals, therefrom select the secondary signal of preset frequency, wherein, the frequency of described local oscillation signal is the absolute value of difference of the frequency of the frequency of described secondary signal and described first signal.
Step S104: send described secondary signal, described secondary signal is the above-mentioned secondary signal that carries the time division multiplexing frame.
In this step, because the frequency of secondary signal and first signal is different, so, when sending secondary signal, employed wireless channel is different from the wireless channel that sends secondary signal, the frequency of the employed wireless signal of time division multiplexing frame that sends in this step in particular, is different from the frequency of the employed wireless signal of time division multiplexing frame that video intercom sends.
Specifically when sending, in order to reduce power consumption, if only have video data in the described time division multiplexing frame, so, after sending frame synchronizing signal, only in the 3rd time slot, send this video data, and in the second time slot, do not send any data; Otherwise, if only have voice data in the described time division multiplexing frame, so, after sending frame synchronizing signal, only in the second time slot, send voice data, and in the 3rd time slot, do not send any data.
When sending described secondary signal, send first frame synchronizing signal, and then send video data or voice data, when described time division multiplexing frame is transmitted, switch to the data receiver pattern.In like manner, whether the time division multiplexing frame is sent completely also and determines according to the length of frame synchronizing signal and time division multiplexing frame.
A kind of data transmission method that the embodiment of the present application provides, the time division multiplexing frame is sent with different frequency, described time division multiplexing frame sends voice and video with different time slots, increased the transmission range of voice and video, enlarged the scope of application of video intercom, by the method that the embodiment of the present application provides, can be so that the communication distance between the video intercom be increased to 10 kilometers.
Preferably, among the step S101, receiving the first signal that carries the time division multiplexing frame can realize in the following manner:
Each channel of periodic scan;
In this programme, can only have a receive channel, a transmitting channel; Also a plurality of receive channels can be arranged, a plurality of transmitting channels;
When a plurality of receive channels are arranged, during a plurality of transmitting channel, transmitting channel and receive channel can be made up grouping, corresponding the first transmitting channel of the first receive channel for example, corresponding the second transmitting channel of the second receive channel, the like, when utilizing the channel that makes up after dividing into groups to carry out the reception of signal and sending, the time division multiplexing frame that receives from the first receive channel sends by the first transmitting channel; The time division multiplexing frame that receives from the second receive channel sends by the second transmitting channel.
The first receiver is switched to the channel of signal transmission, the first signal that is transmitted to receive this channel.
Please referring to Fig. 3, the flow chart of a kind of data transmission method for uplink that Fig. 3 provides for the embodiment of the present application, the embodiment of the present application provides a kind of data transmission method for uplink, is applied to video intercom, comprising:
Step S301: image data, described data comprise voice data or video data or the combination of the two, that is to say, video intercom can only send voice data when sending data, also can only send video data, certainly can also both send voice data, send again video data.
Step S302: be the time division multiplexing frame with described data encapsulation; Described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe; Wherein, each subframe sends by different time slots, the first time slot (being the frame synchronizing signal subframe) is used for the transmission frame synchronizing signal, and the second time slot (being the voice data subframe) is used for the transmission of audio data, and the 3rd time slot (being the video data subframe) is used for transmitting video data; That is to say, when sending data, data waiting for transmission are divided into a plurality of little fragments, send by a plurality of time division multiplexing frames, each time division multiplexing frame sends the data of a little fragment.
Preferably, the duration of described the 3rd time slot is greater than the duration of described the second time slot; The frame length of described time division multiplexing frame can be 20ms, can certainly suitably adjust according to practical situations, is not specifically limited here.
Step S303: the first signal that will carry described time division multiplexing frame sends by predetermined channel.
In the present embodiment, described time division multiplexing frame is baseband signal, described baseband signal is modulated to the signal of preset frequency, and namely then first signal sends this first signal by the channel corresponding with it.
In the present embodiment, video intercom can have several tranmitting frequencies (or channel), specifically in which frequency sends, can be by user selection.
When the user sends information with video intercom, the frequency that first selection will be used, then, send after with data by selected frequency, in like manner, when sending the time division multiplexing frame, can only have voice data in the described time division multiplexing frame, also can only have video data, perhaps existing voice data has again video data.
Need to prove, provide in the market and the intercom that uses generally take the analog voice conversation as main, the 3G service that a part relies on public network provides video communication.Traditional intercom transmission bandwidth only can be supported simple low speed voice communication in tens KHz, can't support the video communication that the bandwidth demand is large.When needing the situation of emergency treatment under running into without the public network environment, voice call often can not be satisfied the solution of particular problem.When passing through intercom guide field staff treatment technology problem such as the professional and technical personnel, only often can not actually solve particular problem by speech sound eeplaining, and delay the more time.When the data transmission method for uplink of using the embodiment of the present application and providing, be applied to video intercom, support video communication, the technical staff can locate quickly and accurately by the video that the scene passes over the problem of existence, and the accurate instruction Field Force deals with problems quickly and efficiently.For some special emergent scenes,, disaster area rescue explosive such as the scene, mobile monitor, frontier defense inspection, cooperation etc.More reliable, quicker, more efficiently communication that video intercom can provide.
A kind of data transmission method for uplink that is applied to intercom that the embodiment of the present application provides, be the time division multiplexing frame with certain format with the data encapsulation that gathers, send the time division multiplexing frame by first signal, so that video intercom both can send vision signal, also can send voice signal, make things convenient for the professional and technical personnel by video information operation field effectively to be commanded, improved video intercom user's operating efficiency.
Please referring to Fig. 4, the flow chart of a kind of data receive method that Fig. 4 provides for the embodiment of the present application, the embodiment of the present application provides a kind of data receive method, is applied to video intercom, comprising:
Step S401: each channel of periodic scan;
In the present embodiment, video intercom can have several receive frequencies (or channel), and when video intercom did not have receive data, each channel of intermittent scanning monitored whether the signal transmission is arranged in each channel.
Step S402: the second receiver is switched to the channel of signal transmission, to receive the signal of this transmission.
When scanning certain channel in signal when transmission, arranged, the receiver in this video intercom (i.e. the second receiver) is switched to this channel, to receive the signal of this transmission.
In the present embodiment, when this video intercom and when sending distance between the first video intercom of first signal less than the effective communication distance of video intercom, video intercom both can receive described first signal, also can receive secondary signal, at this moment, can select to receive only a signal; Also can select to receive simultaneously two signals, from two signals, demodulate baseband signal (being the time-division multiplexed frame), merge, thereby obtain complete baseband signal, be i.e. the time-division multiplexed frame.When this video intercom and when sending distance between the first video intercom of first signal greater than the effective communication distance of video intercom, this video intercom can only receive secondary signal.
Step S403: show the video information in the signal that receives.
When including video data in the signal that receives, show described video.
A kind of data receive method that the embodiment of the present application provides, by each channel of periodic scan, in signal when transmission, arranged scanning certain channel, the second receiver is switched to the channel of signal transmission, to receive the signal of this transmission, after application the method, video intercom can receive the information that the video intercom beyond its efficient communication scope sends, therefore, enlarged the scope of application of video intercom.
Please referring to Fig. 5, the structural representation of a kind of data transmission device that Fig. 5 provides for the embodiment of the present application comprises:
The 3rd receiver 501, frequency converter 502 and transmitter 503; Wherein,
The 3rd receiver 501 is used for receiving the first signal that carries the time division multiplexing frame, and described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe; Wherein, each subframe is by different slot transmission, the first time slot (being the frame synchronizing signal subframe) is used for the transmission frame synchronizing signal, and the second time slot (being the voice data subframe) is used for the transmission of audio data, and the 3rd time slot (being the video data subframe) is used for transmitting video data;
Preferably, the duration of described the 3rd time slot is greater than the duration of described the second time slot; The frame length of described time division multiplexing frame can be 20ms, can certainly suitably adjust according to practical situations, is not specifically limited here.
Because the frequency of secondary signal and first signal is different, so, transmitter 503 is when sending secondary signal, employed wireless channel is different from the wireless channel that receives first signal, in particular, the frequency of the employed wireless signal of time division multiplexing frame of transmitter 503 transmissions is different from the frequency of the employed wireless signal of time division multiplexing frame of video intercom transmission.
Specifically when sending, in order to reduce power consumption, if only have video data in the described time division multiplexing frame, so, after sending frame synchronizing signal, only in the 3rd time slot, send this video data, and in the second time slot, do not send any data; Otherwise, if only have voice data in the described time division multiplexing frame, so, after sending frame synchronizing signal, only in the second time slot, send voice data, and in any data of the inner transmission of the 3rd time slot.
When sending described secondary signal, send first frame synchronizing signal, and then send video data or voice data, when described time division multiplexing frame is transmitted, switch to the data receiver pattern.In like manner, whether the time division multiplexing frame is sent completely also and determines according to the length of frame synchronizing signal and time division multiplexing frame.
Certainly, the data transmission device that the embodiment of the present application provides also can be supported the signal relaying of wired form, and the signal in a zone is extended to farther zone, or two or more at a distance " isolated island " joint areas are got up.
The embodiment of the present application provide one in data transmission device, by the time division multiplexing frame is sent with different frequency, described time division multiplexing frame sends voice and video with different time slots, has increased the transmission range of voice and video, has enlarged the scope of application of video intercom.
Please referring to Fig. 6, the structural representation of the another kind of data transmission device that Fig. 6 provides for the embodiment of the present application, on basis embodiment illustrated in fig. 5, in the embodiment of the present application,
Described the 3rd receiver 501 can comprise:
Receiving element 603 is used for receiving described first signal.
Described frequency converter 502 can comprise:
Determining unit 605 is used for determining according to the frame length of described time division multiplexing frame whether described time division multiplexing frame finishes receiving;
Converting unit 606 is used for when described time division multiplexing frame finishes receiving described first signal being carried out frequency inverted, obtains secondary signal.
Please referring to Fig. 7, the structural representation of a kind of data sending device that Fig. 7 provides for the embodiment of the present application, this data sending device is used for video intercom, comprising:
Preferably, described acquisition module 701 can comprise the first collecting unit and the second collecting unit, and wherein, described the first collecting unit comprises the first-class equipment of shooting, and described the second collecting unit comprises the equipment such as recording pen.Need to prove, described audio signal and described vision signal are baseband signal.
Sending module 703 sends by predetermined channel for the first signal that will carry described time division multiplexing frame.
Need to prove that described time division multiplexing frame is baseband signal, described first signal is for to modulate later signal to described baseband signal.
Please referring to Fig. 8, the structural representation of a kind of data sink that Fig. 8 provides for the embodiment of the present application, described data sink is applied to video intercom, comprising:
The embodiment of the present application also provides a kind of wireless communication system, and described system comprises at least one first video intercom, at least one data transmission device and at least one second video intercom;
Please referring to Fig. 9, the structural representation of a kind of data transmission system that Fig. 9 provides for the embodiment of the present application comprises:
The first video intercom 901, data transmission device 902 and the second video intercom 903;
The first video intercom can be at f
AFrequency range sends first signal, also can be at f
BFrequency range sends first signal, and specifically in which frequency range sending can be by user selection.
Here suppose that the first video intercom 901 is at f
AFrequency range sends first signal, and two frequency ranges of data transmission device 902 periodic scan are when monitoring f
AWhen frequency range has the signal transmission, its built-in receiver is switched to f
AFrequency range is at f
AFrequency range receives described first signal, and f is arrived in the frequency translation of described first signal
BAfter, pass through f
BFrequency range sends.
Two frequency ranges of the second video intercom 903 periodic scan are when monitoring f
BWhen frequency range had the signal transmission, the receiving circuit that it is built-in switched to f
BFrequency range is at f
BFrequency range receives the signal that described data transmission device 902 sends.
When in the efficient communication scope of distance at video intercom of 901 of the second video intercom 903 and the first video intercoms, the second video intercom 903 can also be at f
AFrequency range receives the first signal that the first video intercom 901 sends.
If the first video intercom 901 is at f
BFrequency range sends first signal, so, after data transmission device 902 receives described first signal, with the frequency inverted of described first signal to f
ASend after the frequency range, when in the efficient communication scope of distance at video intercom of 901 of the second video intercom 903 and the first video intercoms, the second video intercom 903 can also be at f
BFrequency range receives the first signal that the first video intercom 901 sends.
Please referring to Figure 10, the structural representation of the another kind of wireless communication system that Figure 10 provides for the embodiment of the present application,
Among Figure 10, at least comprise two sub-communication zones in the communication zone 1004, there is shown three sub-communication zones, be respectively the first sub-communication zone 1001, the second sub-communication zone 1002 and the 3rd sub-communication zone 1003, not directly be communicated with between each sub-communication zone, each sub-communication zone comprises two video intercoms at least, the first video intercom 10011 and the second video intercom 10012 in the first sub-communication zone 1001, the first video intercom 10031 and the second video intercom 10032 in the first video intercom 10021 in the second sub-communication zone 1002 and the second video intercom 10022, the three sub-communication zones 1003.
In the present embodiment, the frequency range of video intercom direct communication is f
AThat is to say, in a sub-communication zone, can directly not communicate by means of data transmission device 1005 between the video intercom, as can directly communicating between the first video intercom 10011 in the first sub-communication zone 1001 and the second video intercom 10012, also can directly communicate between the first video intercom 10021 in the second sub-communication zone 1002 and the second video intercom 10022, and between the video intercom in the different sub-communication zones, between the first video intercom 10021 in the second video intercom 10012 in the first sub-communication zone 1001 and the second sub-communication zone 1002, if the effective communication distance that the distance between these two video intercoms directly communicates less than or equal to video intercom, so, can directly communicate between the first video intercom 10021 in the second video intercom 10012 in the first sub-communication zone 1001 and the second sub-communication zone 1002, if and the effective communication distance that the distance between these two video intercoms directly communicates greater than video intercom, so, can communicate by data transmission device 1005 between the first video intercom 10021 in the second video intercom 10012 in the first sub-communication zone 1001 and the second sub-communication zone 1002, but, data transmission device 1005 is fully transparent for the both sides of communication, the existence of the imperceptible data transmission device 1005 of the both sides of communication.
In the present embodiment, between each sub-communication zone, in the time of can't linking up owing to factors such as geography, can connect two sub-communication zones by data transmission device 1005 and make it to become a larger zone, thereby improve communication distance and coverage rate.
Take the communication between the first sub-communication zone 1001 and the 3rd sub-communication zone 1003 as example, suppose that the first video intercom 10011 in the first sub-communication zone 1001 will send speech data and video data to the video intercom in the 3rd sub-communication zone, after the first video intercom 10011 in the first sub-communication zone 1001 gathers voice data and speech data, respectively voice data and speech data all are divided into little fragment, audio fragment and sound bite are encapsulated in the time division multiplexing frame, each a time division multiplexing frame audio fragment of transmission and a video segment, the time division multiplexing frame is baseband signal, when transmission, the first video intercom 10011 in the first sub-communication zone 1001 arrives f with the frequency modulation(FM) of baseband signal
ASend after the frequency range, the video intercom in the 3rd sub-communication zone is intercepted f simultaneously
AFrequency range and f
BFrequency range, because the video intercom in the first sub-communication zone 1001 and the 3rd sub-communication zone 1003 can not directly communicate, therefore, the video intercom in the 3rd sub-communication zone is at f
AFrequency range can not be received the signal that the first video intercom 10011 in the first sub-communication zone 1001 sends.Data transmission device 1005 passes through f
AFrequency range carries out this signal to pass through f after the frequency inverted after receiving the signal of the first video intercom 10011 transmissions in the sub-communication zone 1001
BFrequency range sends, and at this moment, the video intercom in the third communication zone is f all
BFrequency range receives the time division multiplexing frame that the first video intercom 10011 in the first sub-communication zone 1001 sends.
Certainly, data transmission device 1005 also can be supported the signal relaying of wired form, and the signal in a zone is extended to farther zone, or two or more at a distance " isolated island " joint areas are got up.
Please referring to Figure 11, the theory diagram of the data transmission device that Figure 11 provides for the embodiment of the present application, wherein, f
AThe selected frequency range of representative, and f
BRepresentative conversion frequency range, data transmission device receives f
ABehind the signal of frequency range, enter band pass filter and carry out bandpass filtering, remove that frequency band is outer to be disturbed and noise, by entering frequency mixer behind the low noise amplifier LNA, by with local oscillator excitation signal LO mixing, with frequency modulation(FM) to f
BFrequency range is after then the signal that modulates being amplified by power amplifier, because therefore frequency mixer meeting output multi-channel mixed frequency signal, selects required frequency f with the signal of frequency mixer output by the filter filter
BSignal send.
Need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are separated with another entity or operating space, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or the operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and identical similar part is mutually referring to getting final product between each embodiment, and each embodiment stresses is difference with other embodiment.The above only is the application's embodiment; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the application's protection range.
Claims (12)
1. a data transmission method is used for the communication between the video intercom, it is characterized in that, comprising:
Reception carries the first signal of time division multiplexing frame, and described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
When described time division multiplexing frame finishes receiving, obtain the secondary signal that carries described time division multiplexing frame according to described first signal, the frequency of described secondary signal is different from the frequency of described first signal;
Send described secondary signal.
2. method according to claim 1, it is characterized in that, the voice data that transmits in the described voice data subframe is the voice data that the first video intercom sends, and the video data that transmits in the described video data subframe is the video data that the second video intercom sends.
3. method according to claim 1 is characterized in that, determines according to following manner whether described time division multiplexing frame finishes receiving:
The identification frame synchronizing signal is determined the time that described time division multiplexing frame begins to transmit;
Frame length according to described time division multiplexing frame determines whether described time division multiplexing frame finishes receiving.
4. method according to claim 1 is characterized in that, the described first signal of described foundation obtains the secondary signal that carries described time division multiplexing frame and comprises:
Described first signal is carried out frequency inverted, obtain secondary signal.
5. method according to claim 1 is characterized in that, the first signal that described reception carries the time division multiplexing frame comprises:
Each channel of periodic scan;
The first receiver is switched to the channel of signal transmission, the first signal that is transmitted to receive this channel.
6. a data transmission method for uplink is applied to video intercom, it is characterized in that, comprising:
Image data; Described data comprise voice data or video data or the combination of the two;
Be the time division multiplexing frame with described data encapsulation; Described time division multiplexing frame comprises the frame synchronizing signal subframe, voice data subframe, and video data subframe;
The first signal that carries described time division multiplexing frame is sent by predetermined channel.
7. a data receive method is applied to video intercom, it is characterized in that, comprising:
Each channel of periodic scan;
The second receiver is switched to the channel of signal transmission, to receive the signal of this transmission;
Show the video information in the signal that receives.
8. a data transmission device is characterized in that, comprising:
The 3rd receiver is used for receiving the first signal that carries the time division multiplexing frame, and described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
Frequency converter is used for obtaining the secondary signal that carries described time division multiplexing frame according to described first signal when described time division multiplexing frame finishes receiving, and the frequency of described secondary signal is different from the frequency of described first signal;
Transmitter is used for sending described secondary signal.
9. device according to claim 8 is characterized in that, described the 3rd receiver comprises:
Scanning element, switch unit and receiving element, wherein:
Scanning element is used for each channel of periodic scan;
Switch unit is used for described receiving element is switched to the channel that signal transmits, the first signal that is transmitted to receive this channel, described first signal carries the time division multiplexing frame, described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
Receiving element is used for receiving described first signal.
10. device according to claim 8 is characterized in that, described frequency converter comprises:
Recognition unit is used for the identification frame synchronizing signal, determines the time that described time division multiplexing frame begins to transmit;
Determining unit is used for determining according to the frame length of described time division multiplexing frame whether described time division multiplexing frame finishes receiving;
Converting unit is used for when described time division multiplexing frame finishes receiving described first signal being carried out frequency inverted, obtains secondary signal.
11. a data sending device is applied to video intercom, it is characterized in that, comprising:
Acquisition module is used for image data; Described data comprise voice data or video data or the combination of the two;
Package module, being used for described data encapsulation is the time division multiplexing frame; Described time division multiplexing frame comprises the frame synchronizing signal subframe at least, voice data subframe, and video data subframe;
Sending module sends by predetermined channel for the first signal that will carry described time division multiplexing frame.
12. a data sink is applied to video intercom, it is characterized in that, comprising:
Scan module, handover module, receiver module and display module; Wherein,
Scan module is used for each channel of periodic scan;
Handover module is used for the second receiver is switched to the channel of signal transmission, so that described receiver module receives the signal of this transmission;
Display module shows for the video information of the signal that receiver module is received.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199855A (en) * | 2017-05-11 | 2018-06-22 | 南京义怀数据系统有限公司 | A kind of two-way multimedia means of communication based on digital broadcasting |
| CN112954253A (en) * | 2021-03-29 | 2021-06-11 | 广州慧睿思通科技股份有限公司 | Intercom |
| CN113708796A (en) * | 2021-10-13 | 2021-11-26 | 广州慧睿思通科技股份有限公司 | Interphone communication method, interphone, narrow-band ad hoc network system and electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020126685A1 (en) * | 2001-03-12 | 2002-09-12 | Leatherbury Ryan M. | Time division multiplexing over broadband modulation method and apparatus |
| US20030147372A1 (en) * | 2002-02-01 | 2003-08-07 | Pattavina Jeffrey S. | Method and system for encapsulating time division multiplex data into individual packets of a packet based network |
| CN101102509A (en) * | 2007-08-03 | 2008-01-09 | 中兴通讯股份有限公司 | A data synchronization method for mobile multimedia broadcast system |
| CN102281558A (en) * | 2011-06-23 | 2011-12-14 | 成都赛康信息技术有限责任公司 | Wireless sensor networking method applied to data transmission of internet of things |
-
2013
- 2013-01-25 CN CN201310028111.9A patent/CN103051861B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020126685A1 (en) * | 2001-03-12 | 2002-09-12 | Leatherbury Ryan M. | Time division multiplexing over broadband modulation method and apparatus |
| US20030147372A1 (en) * | 2002-02-01 | 2003-08-07 | Pattavina Jeffrey S. | Method and system for encapsulating time division multiplex data into individual packets of a packet based network |
| CN101102509A (en) * | 2007-08-03 | 2008-01-09 | 中兴通讯股份有限公司 | A data synchronization method for mobile multimedia broadcast system |
| CN102281558A (en) * | 2011-06-23 | 2011-12-14 | 成都赛康信息技术有限责任公司 | Wireless sensor networking method applied to data transmission of internet of things |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199855A (en) * | 2017-05-11 | 2018-06-22 | 南京义怀数据系统有限公司 | A kind of two-way multimedia means of communication based on digital broadcasting |
| CN112954253A (en) * | 2021-03-29 | 2021-06-11 | 广州慧睿思通科技股份有限公司 | Intercom |
| CN113708796A (en) * | 2021-10-13 | 2021-11-26 | 广州慧睿思通科技股份有限公司 | Interphone communication method, interphone, narrow-band ad hoc network system and electronic device |
| CN113708796B (en) * | 2021-10-13 | 2022-02-15 | 广州慧睿思通科技股份有限公司 | Interphone communication method, interphone, narrow-band ad hoc network system and electronic device |
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| CN103051861B (en) | 2016-08-03 |
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