CN103051861B - A kind of data transmission method and device - Google Patents
A kind of data transmission method and device Download PDFInfo
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- CN103051861B CN103051861B CN201310028111.9A CN201310028111A CN103051861B CN 103051861 B CN103051861 B CN 103051861B CN 201310028111 A CN201310028111 A CN 201310028111A CN 103051861 B CN103051861 B CN 103051861B
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Abstract
The invention discloses a kind of data transmission method, receive the first signal carrying time division multiplex frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；When described time division multiplex frame finishes receiving, carrying the secondary signal of described time division multiplex frame according to described first signal acquisition, the frequency of described secondary signal is different from the frequency of described first signal；Send described secondary signal.The data transmission method that the embodiment of the present application provides, sends time division multiplex frame with different frequency, and described time division multiplex frame sends voice and video with different time slots, adds the transmission range of voice and video, expands the range of video intercom.
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, without in the environment of public network, for realizing instant messaging, talkback system is typically used.And in order to meet emergency communication and the industry user demand to visual command scheduling, a kind of support sound, the wireless hand-held transmitter receiver (hereinafter referred to as video intercom) of transmission of video arises at the historic moment, but the signal effective propagation path of current video intercom is typically in 1 ~ 3 kilometer range, when distance between video intercom exceedes the signal effective communication distance of video intercom, will be unable between video intercom communicate, limit the range of video intercom, therefore, the range how expanding video intercom becomes problem demanding prompt solution.
Summary of the invention
For solving above-mentioned technical problem, the embodiment of the present application provides a kind of data transmission method, to expand the range of video intercom.
Technical scheme is as follows:
A kind of data transmission method, the communication between video intercom, including:
Receiving the first signal carrying time division multiplex frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
When described time division multiplex frame finishes receiving, carrying the secondary signal of described time division multiplex frame according to described first signal acquisition, the frequency of described secondary signal is different from the frequency of described first signal；
Send described secondary signal.
Said method, it is preferred that in described voice data subframe, the voice data of transmission is the voice data that the first video intercom sends, in described video data subframe, the video data of transmission is the video data that the second video intercom sends.
Said method, it is preferred that determine whether described time division multiplex frame finishes receiving according to following manner:
Identify frame synchronizing signal, determine that described time division multiplex frame starts the time of transmission；
Determine whether described time division multiplex frame finishes receiving according to the frame length of described time division multiplex frame.
Said method, it is preferred that described carry the secondary signal of described time division multiplex frame according to described first signal acquisition and include:
Described first signal is carried out frequency conversion, it is thus achieved that secondary signal.
Said method, it is preferred that described reception carries the first signal of time division multiplex frame and includes:
Each channel of periodic scan；
First receiver is switched to the channel of signal transmission, to receive the first signal that this channel is transmitted.
A kind of data transmission method for uplink, is applied to video intercom, including:
Gather data；Described data include voice data or video data or the combination of the two；
Described data are encapsulated as time division multiplex frame；Described time division multiplex frame includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
The first signal carrying described time division multiplex frame is sent by predetermined channel.
A kind of data receiver method, is applied to video intercom, including:
Each channel of periodic scan；
Second receiver is switched to the channel of signal transmission, to receive the signal of this transmission；
Video information in the signal that display receives.
A kind of data transmission device, including:
3rd receiver, for receiving the first signal carrying time division multiplex frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
Converter, for when described time division multiplex frame finishes receiving, carries the secondary signal of described time division multiplex frame according to described first signal acquisition, 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, it is preferred that described 3rd receiver includes:
Scanning element, switch unit and reception unit, wherein:
Scanning element, for each channel of periodic scan；
Switch unit, for switching to the channel of signal transmission, to receive the first signal that this channel is transmitted by described reception unit, described first signaling bearer has time-division multiplexed frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
Receive unit, be used for receiving described first signal.
Said apparatus, it is preferred that described converter includes:
Recognition unit, is used for identifying frame synchronizing signal, determines that described time division multiplex frame starts the time of transmission；
Determine unit, for determining whether described time division multiplex frame finishes receiving according to the frame length of described time division multiplex frame；
Converting unit, for when described time division multiplex frame finishes receiving, carries out frequency conversion to described first signal, it is thus achieved that secondary signal.
A kind of data sending device, is applied to video intercom, including:
Acquisition module, is used for gathering data；Described data include voice data or video data or the combination of the two；
Package module, for being encapsulated as time division multiplex frame by described data；Described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
Sending module, for sending the first signal carrying described time division multiplex frame by predetermined channel.
A kind of data sink, is applied to video intercom, including:
Scan module, handover module, receiver module and display module；Wherein,
Scan module is used for each channel of periodic scan；
Handover module for switching to the channel of signal transmission by the second receiver, in order to described receiver module receives the signal of this transmission；
Display module video information in the signal receiving receiver module shows.
A kind of data transmission method that application the embodiment of the present application provides, receives the first signal carrying time division multiplex frame, and described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；When described time division multiplex frame finishes receiving, carrying the secondary signal of described time division multiplex frame according to the first signal acquisition, the frequency of described secondary signal is different from the frequency of described first signal；Send described secondary signal.
It can thus be appreciated that, the data transmission method that the embodiment of the present application provides, sends the time division multiplex frame that the first transmitter receiver sends with different frequency, and described time division multiplex frame sends voice and video with different time slots, add the transmission range of voice and video, expand the range of transmitter receiver.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present application, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments described in the application, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
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 multiplex frame that the transmitter receiver 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 receiver 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 simplicity and clarity of illustration, the figures above shows the common form of structure, and in order to avoid the unnecessary fuzzy present invention, it is convenient to omit known features and the description of technology and details.It addition, the unit in accompanying drawing has not necessarily been drawn to scale.For example, it is possible to relative to the size of some unit in other unit enlarged drawings, thus help to be better understood from embodiments of the invention.Identical label in different accompanying drawings represents identical unit.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the application 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, it is clear that described embodiment is only some embodiments of the present application rather than whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to the scope of the application protection.
The communication that a kind of data transmission method that the embodiment of the present application provides is applied between video intercom, refer to the flow chart of a kind of data transmission method that Fig. 1, Fig. 1 provide for the embodiment of the present application, including:
Step S101: receiving the first signal carrying time division multiplex frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
In this step, the frame format of described time division multiplex frame is as in figure 2 it is shown, it at least includes three parts: frame synchronizing signal subframe, voice data subframe, and video data subframe；Wherein, each subframe is by different slot transmission, first time slot (i.e. frame synchronizing signal subframe) is used for transmission frame synchronizing signal, and the second time slot (i.e. voice data subframe) is used for transmitting voice data, and the 3rd time slot (i.e. video data subframe) is used for transmitting video data；
Preferably, in order to ensure the switching that video intercom is received and transmitted between two states, it is additionally provided with protection interval between adjacent sub-frame, wherein, can unprotected be spaced between frame synchronizing signal subframe and voice data subframe.
Such as; when the video data in a time division multiplex frame and voice data are from different video intercom; such as; video data is from the first transmitter receiver, and voice data is from the second transmitter receiver, then; for the first transmitter receiver; video data is transmission state, and voice data is then reception state, then arranges protection interval between voice data and video data and can ensure that the switching that voice data is received and sends between two states to video data by the first video intercom；There is provided time enough interval can also ensure the largest coverage distance of system.Concrete time interval can rule of thumb or the applicable cases of reality is determined.
Preferably, the duration of described 3rd time slot is more than the duration of described second time slot；The frame length of described time division multiplex frame can be 20ms, naturally it is also possible to suitably adjusts according to practical situations, is not specifically limited here.
Apply described time division multiplex transmission frame number according to time, one time division multiplex frame can a transmitting video data (now speech data subframe is empty), can also only transmit voice data (now video data subframe is sky), it is, of course, also possible to transmitting video data and voice data simultaneously；In time division multiplex frame, the transmission order of voice data and video data is pre-set, but no matter it is that data transfer mode, will first transmission frame synchronizing signal, then voice data and video data are retransmited, say, that when receiving time division multiplex frame, first receive 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 multiplex transmission frame number according to time, in same time division multiplex frame, described voice data subframe and described video data sub-frame transmission can be voice data and the video datas of same video intercom transmission, certainly, can also be voice data and the video data of different video intercom transmission, i.e. voice data in speech data subframe comes from the first video intercom, and the video data in video data subframe comes from the second transmitter receiver.Such as, when the second video intercom detects the synchronizing signal of the first video intercom, and after synchronous, the time division multiplex frame sending the first video intercom is detected, if the time division multiplex frame that the first video intercom sends only has frame synchronizing signal subframe and voice data subframe, and video data subframe is idle, then the second video intercom can send video data in idle video data subframe.
It should be noted that described time division multiplex frame is baseband signal, described first signal is that described baseband signal is modulated later signal.
Step S102: judge whether described time division multiplex frame finishes receiving, if it is, perform step S103, otherwise, continues to described first signal.
Preferably, can determine whether described time division multiplex frame finishes receiving according to the frame length of described frame synchronizing signal and described time division multiplex frame, specifically may include that identification frame synchronizing signal, determine that described time division multiplex frame starts the time of transmission, that is, when receiving frame synchronizing signal, illustrate to start to receive time division multiplex frame；Determine whether described time division multiplex frame finishes receiving according to the frame length of described time division multiplex frame, i.e., frame length according to time division multiplex frame is assured that the time point receiving end of time division multiplex frame, also be that is, when receiving frame synchronizing signal, start timing, when timing duration reaches the frame length of time division multiplex frame, illustrate that described time division multiplex frame finishes receiving.When a time division multiplex frame finishes receiving, perform step S103.
Step S103: carry the secondary signal of described time division multiplex frame according to described first signal acquisition, the frequency of described secondary signal is different from the frequency of described first signal；
When described time division multiplex frame finishes receiving, it is switched to data transmission modes, and described first signal is converted to secondary signal；
Concrete, when obtaining described secondary signal, can be there to be following two mode:
Mode 1: be demodulated described first signal, obtains described time division multiplex frame, and described time division multiplex frame is baseband signal, described baseband signal is modulated with the frequency being different from described first signal, it is thus achieved that secondary signal.
Mode 2: directly shown first signal is carried out frequency-conversion processing, i.e. described first signal is carried out frequency transformation, including:
Obtain local oscillation signal, described local oscillation signal is mixed with described first signal, obtains some mixed signals, therefrom select the secondary signal of preset frequency, wherein, the frequency of described local oscillation signal is the frequency absolute value with the difference of the frequency of described first signal of described secondary signal.
Step S104: send described secondary signal, the most above-mentioned secondary signal carrying time division multiplex frame of described secondary signal.
In this step, because secondary signal is different with the frequency of the first signal, so, when sending secondary signal, the wireless channel used is different from the wireless channel sending secondary signal, in particular, the frequency of the wireless signal that the frequency of the wireless signal that the time division multiplex frame sent in this step is used is used from the time division multiplex frame that video intercom sends is different.
Specifically when sending, in order to reduce power consumption, if only video data in described time division multiplex frame, then, after sending frame synchronizing signal, only in the 3rd time slot, would send this video data, and in the second time slot, do not send any data；Whereas if described time division multiplex frame only has voice data, then, after sending frame synchronizing signal, in the second time slot, only send voice data, and do not send any data in the 3rd time slot.
When sending described secondary signal, first send frame synchronizing signal, then retransmit video data or voice data, when described time division multiplex frame is transmitted, be switched to data receiver pattern.In like manner, whether time division multiplex frame is sent completely and also determines according to the length of frame synchronizing signal and time division multiplex frame.
A kind of data transmission method that the embodiment of the present application provides, time division multiplex frame is sent with different frequency, described time division multiplex frame sends voice and video with different time slots, add the transmission range of voice and video, expand the range of video intercom, the method provided by the embodiment of the present application, can make the communication distance between video intercom increase to 10 kilometers.
Preferably, in step S101, reception carries the first signal of time division multiplex frame and can be accomplished by:
Each channel of periodic scan；
In this programme, can receive channel with only one of which, one sends channel；Can also there be multiple reception channel, multiple transmission channels；
When there being multiple reception channel, during multiple transmission channel, packet can be combined with receiving channel by sending channel, such as first receives channel corresponding first sends channel, second receives channel corresponding second sends channel, the like, when utilizing the channel after combining packet carry out the reception of signal and send, the time division multiplex frame received from the first reception channel is sent by the first transmission channel；Send channel from the second time division multiplex frame receiving channel reception by second to send.
First receiver is switched to the channel of signal transmission, to receive the first signal that this channel is transmitted.
Refer to the flow chart of a kind of data transmission method for uplink that Fig. 3, Fig. 3 provide 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, including:
Step S301: gathering data, described data include voice data or video data or the combination of the two, say, that, video intercom, when sending data, can only send voice data, it is also possible to only send video data, certainly can also both send voice data, send again video data.
Step S302: described data are encapsulated as time division multiplex frame；Described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；Wherein, each subframe is sent by different time slots, first time slot (i.e. frame synchronizing signal subframe) is used for transmission frame synchronizing signal, and the second time slot (i.e. voice data subframe) is used for transmitting voice data, and the 3rd time slot (i.e. video data subframe) is used for transmitting video data；It is to say, when sending data, data waiting for transmission are divided into multiple little fragment, are sent by multiple time division multiplex frames, each time division multiplex frame sends the data of a little fragment.
Preferably, the duration of described 3rd time slot is more than the duration of described second time slot；The frame length of described time division multiplex frame can be 20ms, naturally it is also possible to suitably adjusts according to practical situations, is not specifically limited here.
Step S303: the first signal carrying described time division multiplex frame is transmitted by predetermined channel.
In the present embodiment, described time division multiplex frame is baseband signal, is the signal of preset frequency by described modulates baseband signals, and then this first signal is sent by the i.e. first signal by corresponding channel.
In the present embodiment, video intercom can have several tranmitting frequency (or channel), specifically sends in which frequency, can be selected by user.
When user sends information with video intercom, first select frequency to be used, then, sent after data by selected frequency, in like manner, when sending time division multiplex frame, described time division multiplex frame can only have voice data, can also only have video data, or existing voice data has again video data.
It should be noted that provide in the market and the transmitter receiver that uses is typically based on analog voice call, a part relies on the 3G service of public network and provides video communication.Traditional transmitter receiver transmission bandwidth, within tens KHz, is only capable of supporting simple low rate speech communication, it is impossible to support the video communication that bandwidth demand amount is big.When needing the situation of emergent management under running into without public network environment, voice call tends not to meet the solution of particular problem.When such as professional and technical personnel is by transmitter receiver guide field staff's treatment technology problem, only tends not to actual solution particular problem by speech sound eeplaining, and delay the more time.When the data transmission method for uplink that application the embodiment of the present application provides, it is applied to video intercom, supporting video communication, technical staff can position the problem of existence quickly and accurately by the video that scene passes over, and accurate instruction Field Force solves problem quickly and efficiently.For the emergency scene that some are special, the most on-the-spot explosive, disaster area rescue, mobile monitor, frontier defense inspection, cooperation etc..Video intercom can provide more reliable, more rapid, more efficient communication.
A kind of data transmission method for uplink being applied to transmitter receiver that the embodiment of the present application provides, the data of collection are encapsulated as the time division multiplex frame with certain format, time division multiplex frame is sent by the first signal, make video intercom both can send video signal, voice signal can also be sent, facilitate professional and technical personnel by video information, operation field effectively to be commanded, improve the work efficiency of video intercom user.
Refer to the flow chart of a kind of data receiver method that Fig. 4, Fig. 4 provide for the embodiment of the present application, the embodiment of the present application provides a kind of data receiver method, is applied to video intercom, including:
Step S401: each channel of periodic scan；
In the present embodiment, whether video intercom can have several reception frequency (or channel), when video intercom does not receive data, each channel of intermittent scanning, monitor and have signal to transmit 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 and having signal to transmit, the receiver (the i.e. second receiver) in this video intercom is switched to this channel, to receive the signal of this transmission.
In the present embodiment, when distance between this video intercom and the first video intercom sending the first signal is less than the effective communication distance of video intercom, video intercom both can receive described first signal, it is also possible to receives secondary signal, at this point it is possible to select only to receive a signal；Can also select to receive two signals simultaneously, from two signals, demodulate baseband signal (i.e. time-division multiplexed frame), merge, thus obtain complete baseband signal, i.e. time-division multiplexed frame.When distance between this video intercom and the first video intercom sending the first signal is more than the effective communication distance of video intercom, this video intercom can only receive secondary signal.
Step S403: the video information in the signal that display receives.
When the signal received includes video data, show described video.
A kind of data receiver method that the embodiment of the present application provides, by each channel of periodic scan, when scanning certain channel and having signal to transmit, 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, the range of video intercom is expanded.
Refer to the structural representation of a kind of data transmission device that Fig. 5, Fig. 5 provide for the embodiment of the present application, including:
3rd receiver 501, converter 502 and transmitter 503；Wherein,
3rd receiver 501 is for receiving the first signal carrying time division multiplex frame, and described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；Wherein, each subframe is by different slot transmission, first time slot (i.e. frame synchronizing signal subframe) is used for transmission frame synchronizing signal, and the second time slot (i.e. voice data subframe) is used for transmitting voice data, and the 3rd time slot (i.e. video data subframe) is used for transmitting video data；
Preferably, the duration of described 3rd time slot is more than the duration of described second time slot；The frame length of described time division multiplex frame can be 20ms, naturally it is also possible to suitably adjusts according to practical situations, is not specifically limited here.
Converter 502, for when described time division multiplex frame finishes receiving, carries the secondary signal of described time division multiplex frame according to described first signal acquisition, and the frequency of described secondary signal is different from the frequency of described first signal；
According to the frame length of described frame synchronizing signal and described time division multiplex frame, converter 502 can determine whether described time division multiplex frame finishes receiving, specifically may include that identification frame synchronizing signal, determine that described time division multiplex frame starts the time of transmission, that is, when receiving frame synchronizing signal, illustrate to start to receive time division multiplex frame；Determine whether described time division multiplex frame finishes receiving according to the frame length of described time division multiplex frame, i.e., frame length according to time division multiplex frame is assured that the time point receiving end of time division multiplex frame, also be that is, when receiving frame synchronizing signal, start timing, when timing duration reaches the frame length of time division multiplex frame, illustrate that described time division multiplex frame finishes receiving.When a time division multiplex frame finishes receiving, carry the secondary signal of described time division multiplex frame according to described first signal acquisition.
Transmitter 503 is used for sending described secondary signal.
Because secondary signal is different with the frequency of the first signal, so, transmitter 503 is when sending secondary signal, the wireless channel used is different from the wireless channel receiving the first signal, in particular, the frequency of the wireless signal that the frequency of the wireless signal that the time division multiplex frame that transmitter 503 sends is used is used from the time division multiplex frame that video intercom sends is different.
Specifically when sending, in order to reduce power consumption, if only video data in described time division multiplex frame, then, after sending frame synchronizing signal, only in the 3rd time slot, would send this video data, and in the second time slot, do not send any data；Whereas if described time division multiplex frame only has voice data, then, after sending frame synchronizing signal, in the second time slot, only send voice data, and send any data inside the 3rd time slot.
When sending described secondary signal, first send frame synchronizing signal, then retransmit video data or voice data, when described time division multiplex frame is transmitted, be switched to data receiver pattern.In like manner, whether time division multiplex frame is sent completely and also determines according to the length of frame synchronizing signal and time division multiplex frame.
Certainly, the data transmission device that the embodiment of the present application provides can also support the signal relay of wired forms, the signal in a region is extended to farther region, or is coupled together in two or more " isolated island " regions at a distance.
Data transmission device in the one of the embodiment of the present application offer, by time division multiplex frame is sent with different frequency, described time division multiplex frame sends voice and video with different time slots, adds the transmission range of voice and video, expands the range of video intercom.
Refer to the structural representation of the another kind of data transmission device that Fig. 6, Fig. 6 provide for the embodiment of the present application, on the basis of embodiment illustrated in fig. 5, in the embodiment of the present application,
Described 3rd receiver 501 may include that
Scanning element 601, switch unit 602 and reception unit 603；Wherein,
Scanning element 601 is for each channel of periodic scan；
Switch unit 602 for switching to the channel of signal transmission by described reception unit 603, to receive the first signal that this channel is transmitted, described first signaling bearer has time-division multiplexed frame, described time division multiplex frame at least to include frame synchronizing signal subframe, voice data subframe, and video data subframe；
Receive unit 603 to be used for receiving described first signal.
Described converter 502 may include that
Recognition unit 604, determines unit 605 and converting unit 606；Wherein,
Recognition unit 604 is used for identifying frame synchronizing signal, determines that described time division multiplex frame starts the time of transmission；
Determine according to the frame length of described time division multiplex frame, unit 605 is for determining whether described time division multiplex frame finishes receiving；
Converting unit 606, for when described time division multiplex frame finishes receiving, carries out frequency conversion to described first signal, it is thus achieved that secondary signal.
Refer to the structural representation of a kind of data sending device that Fig. 7, Fig. 7 provide for the embodiment of the present application, this data sending device is used for video intercom, including:
Acquisition module 701, package module 702 and sending module 703；Wherein,
Acquisition module 701 is used for gathering data；Described data include voice data or video data or the combination of the two；Described data can be the image data in region residing for described video intercom and voice data.
Preferably, described acquisition module 701 can include the first collecting unit and the second collecting unit, and wherein, described first collecting unit includes imaging first-class equipment, and described second collecting unit includes the equipment such as recording pen.It should be noted that described audio signal and described video signal are baseband signal.
Package module 702 is for being loaded into described data in described time division multiplex frame；Described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；Wherein, each subframe is by different slot transmission, first time slot (i.e. frame synchronizing signal subframe) is used for transmission frame synchronizing signal, and the second time slot (i.e. voice data subframe) is used for transmitting voice data, and the 3rd time slot (i.e. video data subframe) is used for transmitting video data；
Sending module 703, for sending the first signal carrying described time division multiplex frame by predetermined channel.
It should be noted that described time division multiplex frame is baseband signal, described first signal is that described baseband signal is modulated later signal.
Refer to the structural representation of a kind of data sink that Fig. 8, Fig. 8 provide for the embodiment of the present application, described data sink is applied to video intercom, including:
Scan module 801, handover module 802, receiver module 803 and display module 804；Wherein,
Scan module 801 is for each channel of periodic scan；
Handover module 802 for switching to the channel of signal transmission by the second receiver, in order to receiver module 803 receives the signal of this transmission；
Display module 804, the video information in the signal receiving receiver module shows, such as, when including video data in the signal that described receiver module 803 receives, shows described video.
The embodiment of the present application also provides for a kind of wireless communication system, and described system includes at least one first video intercom, at least one data transmission device and at least one second video intercom；
Refer to the structural representation of a kind of data transmission system that Fig. 9, Fig. 9 provide for the embodiment of the present application, including:
First video intercom 901, data transmission device 902 and the second video intercom 903；
First video intercom can be at fAFrequency range is transmitted the first signal, it is also possible at fBFrequency range sends the first signal, specifically sends in which frequency range can be selected by user.
It is assumed here that the first video intercom 901 is at fAFrequency range sends the first signal, and two frequency ranges of data transmission device 902 periodic scan, when monitoring fAWhen frequency range has signal to transmit, its built in receiver is switched to fAFrequency range, at fAFirst signal described in UHF band reception, by the frequency transformation of described first signal to fBAfter, pass through fBFrequency range sends.
Second two frequency ranges of video intercom 903 periodic scan, when monitoring fBWhen frequency range has signal to transmit, the reception circuit that it is built-in is switched to fBFrequency range, at fBThe signal that data transmission device 902 described in UHF band reception sends.
When distance when between the second video intercom 903 and the first video intercom 901 is in the range of the efficient communication of video intercom, the second video intercom 903 can also be at fAThe first signal that UHF band reception the first video intercom 901 sends.
If the first video intercom 901 is at fBFrequency range sends the first signal, then, after data transmission device 902 receives described first signal, the frequency of described first signal is transformed into fASending after frequency range, when the distance when between the second video intercom 903 and the first video intercom 901 is in the range of the efficient communication of video intercom, the second video intercom 903 can also be at fBThe first signal that UHF band reception the first video intercom 901 sends.
Refer to the structural representation of the another kind of wireless communication system that Figure 10, Figure 10 provide for the embodiment of the present application,
In Figure 10, two sub-communication zones are at least included in communication zone 1004, figure shows three sub-communication zones, it is respectively the first sub-communication zone 1001, second sub-communication zone 1002 and the 3rd sub-communication zone 1003, not directly connect between each sub-communication zone, each sub-communication zone at least includes two video intercoms, the first video intercom 10011 and the second video intercom 10012 in first sub-communication zone 1001, the first video intercom 10021 and the second video intercom 10022 in second sub-communication zone 1002, the first video intercom 10031 and the second video intercom 10032 in 3rd sub-communication zone 1003.
In the present embodiment, the frequency range that video intercom directly communicates is fAnull，That is，In a sub-communication zone，Directly can communicate without the help of data transmission device 1005 between video intercom，Can directly communicate between the first video intercom 10011 and the second video intercom 10012 in the first sub-communication zone 1001，Can also directly communicate between the first video intercom 10021 and the second video intercom 10022 in second sub-communication zone 1002，And between the video intercom in different sub-communication zone，As between the second video intercom 10012 in the first sub-communication zone 1001 and the first video intercom 10021 in the second sub-communication zone 1002，If the effective communication distance that the distance between the two video intercom directly communicates less than or equal to video intercom，So，Can directly communicate between the second video intercom 10012 in first sub-communication zone 1001 and the first video intercom 10021 in the second sub-communication zone 1002，And if the effective communication distance that the distance between the two video intercom directly communicates more than video intercom，So，Can be communicated by data transmission device 1005 between the second video intercom 10012 in first sub-communication zone 1001 and the first video intercom 10021 in 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 of both sides 1005 of communication.
In the present embodiment, between each sub-communication zone, when cannot link up due to factors such as geography, two sub-communication zones can be connected by data transmission device 1005 and make a bigger region, thus improve communication distance and coverage rate.
As a example by the communication between the first sub-communication zone 1001 and the 3rd sub-communication zone 1003, assume that the first video intercom 10011 in the first sub-communication zone 1001 to send speech data and video data to the video intercom in the 3rd sub-communication zone, after the first video intercom 10011 in first sub-communication zone 1001 gathers voice data and speech data, respectively voice data and speech data are all divided into little fragment, audio fragment and sound bite are encapsulated in time division multiplex frame, each time division multiplex frame one audio fragment of transmission and a video segment, time division multiplex frame is baseband signal, when transmission, the first video intercom 10011 in first sub-communication zone 1001 is by the frequency modulation(PFM) of baseband signal to fASending after frequency range, the video intercom in the 3rd sub-communication zone intercepts f simultaneouslyAFrequency range and fBFrequency range, due to, the video intercom in the first sub-communication zone 1001 and the 3rd sub-communication zone 1003 can not directly communicate, and therefore, the video intercom in the 3rd sub-communication zone is at fAFrequency range can not receive the signal that the first video intercom 10011 in the first sub-communication zone 1001 sends.Data transmission device 1005 passes through fAAfter frequency range receives the signal that the first video intercom 10011 in a sub-communication zone 1001 sends, after this signal is carried out frequency conversion, pass through fBFrequency range sends, and now, the video intercom in third communication region can f allBThe time division multiplex frame that the first video intercom 10011 in the sub-communication zone of UHF band reception first 1001 sends.
Certainly, data transmission device 1005 can also support the signal relay of wired forms, the signal in a region is extended to farther region, or is coupled together in two or more " isolated island " regions at a distance.
Refer to the theory diagram of the data transmission device that Figure 11, Figure 11 provide, wherein, f for the embodiment of the present applicationARepresent and select frequency range, and fBRepresenting conversion frequency range, data transmission device receives fAAfter the signal of frequency range, enter band filter and carry out bandpass filtering, remove frequency out-of-band interference and noise, by entering frequency mixer after low-noise amplifier LNA, by being mixed, by frequency modulation(PFM) to f with local oscillator excitation signal LOBFrequency range, after then being amplified by power amplifier by the signal modulated, due to frequency mixer meeting output multi-channel mixed frequency signal, therefore, selects required frequency f by the signal that frequency mixer exports by wave filter filteringBSignal send.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation or sequentially that there is any this reality between these entities or operation.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.
Each embodiment in this specification all uses the mode gone forward one by one to describe, and between each embodiment, identical similar part sees mutually, and what each embodiment stressed is the difference with other embodiments.The above is only the detailed description of the invention of the application; it should be pointed out that, for those skilled in the art, on the premise of without departing from the application principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as the protection domain of the application.
Claims (12)
1. a data transmission method, the communication between video intercom, it is characterised in that including:
Receiving the first signal carrying time division multiplex frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
When described time division multiplex frame finishes receiving, carrying the secondary signal of described time division multiplex frame according to described first signal acquisition, the frequency of described secondary signal is different from the frequency of described first signal；
Send described secondary signal.
Method the most according to claim 1, it is characterized in that, in described voice data subframe, the voice data of transmission is the voice data that the first video intercom sends, and in described video data subframe, the video data of transmission is the video data that the second video intercom sends.
Method the most according to claim 1, it is characterised in that determine whether described time division multiplex frame finishes receiving according to following manner:
Identify frame synchronizing signal, determine that described time division multiplex frame starts the time of transmission；
Determine whether described time division multiplex frame finishes receiving according to the frame length of described time division multiplex frame.
Method the most according to claim 1, it is characterised in that described carry the secondary signal of described time division multiplex frame according to described first signal acquisition and include:
Described first signal is carried out frequency conversion, it is thus achieved that secondary signal.
Method the most according to claim 1, it is characterised in that described reception carries the first signal of time division multiplex frame and includes:
Each channel of periodic scan；
First receiver is switched to the channel of signal transmission, to receive the first signal that this channel is transmitted.
6. a data transmission method for uplink, is applied to video intercom, it is characterised in that including:
Gather data；Described data include voice data or video data or the combination of the two；
Described data are encapsulated as time division multiplex frame；Described time division multiplex frame includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
The first signal carrying described time division multiplex frame is sent by predetermined channel.
7. a data receiver method, is applied to video intercom, it is characterised in that including:
Each channel of periodic scan；
Second receiver is switched to the channel of signal transmission, to receive the signal of this transmission；
Video information in the signal that display receives.
8. a data transmission device, it is characterised in that including:
3rd receiver, for receiving the first signal carrying time division multiplex frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
Converter, for when described time division multiplex frame finishes receiving, carries the secondary signal of described time division multiplex frame according to described first signal acquisition, and the frequency of described secondary signal is different from the frequency of described first signal；
Transmitter, is used for sending described secondary signal.
Device the most according to claim 8, it is characterised in that described 3rd receiver includes:
Scanning element, switch unit and reception unit, wherein:
Scanning element, for each channel of periodic scan；
Switch unit, for switching to the channel of signal transmission, to receive the first signal that this channel is transmitted by described reception unit, described first signaling bearer has time-division multiplexed frame, described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
Receive unit, be used for receiving described first signal.
Device the most according to claim 8, it is characterised in that described converter includes:
Recognition unit, is used for identifying frame synchronizing signal, determines that described time division multiplex frame starts the time of transmission；
Determine unit, for determining whether described time division multiplex frame finishes receiving according to the frame length of described time division multiplex frame；
Converting unit, for when described time division multiplex frame finishes receiving, carries out frequency conversion to described first signal, it is thus achieved that secondary signal.
11. 1 kinds of data sending devices, are applied to video intercom, it is characterised in that including:
Acquisition module, is used for gathering data；Described data include voice data or video data or the combination of the two；
Package module, for being encapsulated as time division multiplex frame by described data；Described time division multiplex frame at least includes frame synchronizing signal subframe, voice data subframe, and video data subframe；
Sending module, for sending the first signal carrying described time division multiplex frame by predetermined channel.
12. 1 kinds of data sinks, are applied to video intercom, it is characterised in that including:
Scan module, handover module, receiver module and display module；Wherein,
Scan module is used for each channel of periodic scan；
Handover module for switching to the channel of signal transmission by the second receiver, in order to described receiver module receives the signal of this transmission；
Display module video information in the signal receiving receiver module shows.
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| 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 |
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| 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 |
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