CN1607736A - Wireless transmission and controlling apparatus for video/ audio, multi-system TVs - Google Patents
Wireless transmission and controlling apparatus for video/ audio, multi-system TVs Download PDFInfo
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Abstract
This invention provides wireless transmission of a video/audio multi-system TV and a control device including an emit device, a receive device and a remote control device. Both the emit and receive devices have a data send/receive unit for data double-way communication which can use frame as the encoding of detecting data channels periodically in the time slot of the process to carry out double-way transmission for receiving channel environment of data and display it timely, users can understand the current channel state.
Description
Technical field
The present invention relates to a kind ofly in inside-plant not chummery, realize various standard TV signal and look wireless the sending and receiving of sound/frequency signal, and realize that channel circumstance is detected and the device of control data two-way communication.
Background technology
Chinese patent publication number CN1381958A, disclose a kind of " radio interconnected method of two-way communication and equipment between audio frequency and/or video-unit " open day on November 27th, 2002, and the document provides following method and apparatus:
With reference to figure 1, shown between two audio/video devices (4,8) of the not chummery (2,3) that is arranged at building (1) and set up method of wireless communication and equipment.First of two audio/video devices comprises audio/video signal source (SAV), it can be controlled by remote signal (6), second remote controller (TC) that comprises receiver and produce the remote signal of the wall that can not pass building of two audio/video devices, one (R2) in the relaying sends to other relaying (R1) to remote information by radio link, it can turn back to relaying (R2) to the audio/video signal by radio link from the source, encoder (13) is provided for inserting coding in remote information, and decoder (18) is used for the remote information of the coding that decoding receives by relaying (R1), the coding that it utilizes the reference encoder comparison to comprise in the remote information of coding, if and inconsistent between the two basic points coding, the remote information of refusal decoding.
Said method and equipment, realized to break the wall Durchgangshohle, cabling at chummery not, promptly can reach and move the purpose watch the video/audio program, but also can get rid of when two same radio interconnected equipment are closer to each other, the phenomenon of remote signal phase mutual interference each other.
Yet, said method and equipment, be look/forward of tone signal transmits and the reverse transmission of control signal, from essence, two kinds of signals are feature with one-way transmission still in fact.Therefore, said method and equipment come with some shortcomings or defective inevitably, as:
1. when watching TV programme, must possess cable TV channel decoder equipment, cause cost too high.
2. Radio Link, whether unobstructed, whether interference is arranged, perhaps whether the distance between interconnect equipment has exceeded situations such as applications distances, all can't in time learn; Therefore can cause: remote controller signal is made it can't arrive the destination by hindering and damaging that Radio Link occurred, thereby causes the often malfunctioning or blindly operation of remote control.
Summary of the invention
At the above-mentioned deficiency of prior art, the invention provides a kind of video/audio, the wireless transmission of multi-system television and control device, this device both can utilize lower cost, reached to move to watch the TV programme of various standards or the purpose of video/audio program; Again can be in the time slot that program is carried out, the coding that periodically a frame is used for the detecting data channel, utilize the bidirectional real-time function, channel circumstance in order to detecting data, and give real-time demonstration, and make the user understand current channel status at any time, whether suit to watch and control, thereby avoid operational blindness, improve the validity of controlled in wireless.
Above-mentioned technical problem to be solved by this invention is realized by following technical scheme.
A kind of video/audio, the wireless transmission of multi-system television and control device comprise:
One emitter (TX1), it comprises: the RF tuner pack (12) that is connected with outside CATV RF terminal by RF cable (114), another RF output handle of this RF tuner pack (12) is through the RF signal after the internal distribution, be connected with outside first display unit (TV1) by radio frequency cable (115), this first display unit TV1 both can be an ordinary television receiver, can also be the television indicator of band RF terminal; This RF tuner pack (12) output interface links to each other with an end of video/audio switch unit (13); Video/audio switch unit (13) also is linked in sequence with video/audio transmitter unit (14), first antenna element (15); Another input terminal of video/audio switch unit (13) is connected with outside video/audio source (VA1) by video/audio cable (116); Described emitter (TX1) also comprises first controller unit (10), and it carries out data by data wire (104) with the first data transmit-receive unit (11) and is connected; The described first data transmit-receive unit (12) then comprises: the first coding/decoding unit (111) that is connected with first controller unit (10) and between first a UHF Transmit-Receive Unit (112) of compiling/separating between unit (111) and the UHF antenna (113); The described first data transmit-receive unit (11) is used for setting up the approach that data communication is a purpose between emitter (TX1) and receiving system (RX1); And:
One receiving system (RX1), it comprises: the processing unit (24) of second antenna element (22) that is linked in sequence, video/audio receiving element (23), look/frequently, look audio output interface (25), in order to receive, to separate the carrier signal of carrying the video/audio content that the menstruation regulating Radio Link transmits, and is connected with outside second display unit (TV2) by video/audio output interface (25) and video/audio cable (210), in order to demonstration with listen to from the image and the sound signal of emitter (TX1) transmission; Second display unit (TV2) can be the television receiver or the TV display of band video/audio Interface Terminal; Described receiving system (RX1) also comprises: carry out second controller unit (20) that data are connected by data wire (214) with the second data transmit-receive unit (21); The described second data transmit-receive unit (21), then comprise: through the described second data transmit-receive unit (21) of the second coding/decoding unit (211), the 2nd UHF Transmit-Receive Unit (212), the 2nd UHF antenna (213) that data wire (214) is connected with second controller unit (20), be used between described receiving system (RX1) and emitter (TX1), in order to set up the approach of data communication; Described second controller unit (20) also is connected with infrared receiver (27) with video/audio processing unit (24) respectively by data wire (215) (216); Described receiving system (RX1) also comprises: second infrared remote-control emitter (28) that is used to control.
Wherein, the RF tuner pack (12) in this emitter be that a kind of current collection is looked tuning, intermediate frequency amplifies, the video/audio demodulation function and be integrated in incorporate tuner pack in the same metal shielding; In order to TV RF signals directly is demodulated to the video/audio signal; RF tuner pack (12) also has RF input, two ports of output, and its RF input port is connected with closed-circuit television signal plug (CATV) by radio frequency cable (114); The RF output port can directly link to each other with the antenna input of outside first display unit (VA1) by radio frequency cable (115); RF tuner pack (11) also is used for two or more television systems are received and demodulation.
Wherein, this emitter (TX1) also comprises: built-in I
2First controller unit (10) of C (Inter IC Communication Protocol) universal serial bus driver, it passes through I
2C universal serial bus (100) respectively with have I
2The RF tuner pack (12) of C serial bus interface, video/audio switch unit (13), video/audio transmitter unit (14) carry out bus type and connect; Its effect is to pass through I
2The C universal serial bus is selected the video/audio signal of desire modulation output by control command, and in the mode of radio modulation, carries the carrier signal of video/audio content to the Radio Link emission through first antenna element (15).
Wherein, this emitter (TX1), included first antenna element (14), be built in that a kind of non-in the emitter shell expose antenna assembly; It is made up of chip aerial (Patch Antenna), antenna match substrate (PCB) and antenna radio frequency cable, in order in configuration design, and the constraint and the restriction that are not subjected to common external antenna and are run into.
Wherein, this emitter (TX1), the first included data transmit-receive unit (11), function with data double-way communication: in order to receive and the described receiving system of demodulation (RX1) in the second data transmit-receive unit (21) launched carry data that are used for sensing channel or the carrier wave that contains control command, the answer signal of data that receive this modulated carrier and order, the second data transmit-receive unit (22) in the described receiving system (RX1) is given in back pass again.
Wherein, this receiving system comprises: built-in I
2Second controller unit (20) of C (Inter IC Communication Protocol) universal serial bus driver, it passes through I
2C universal serial bus (200) respectively with have I
2The video/audio receiving element (23) of C serial bus interface, video/audio processing unit (24) carry out bus type and connect; Its effect is by control command, will receive from the carrier wave that carries the video/audio signal of Radio Link, demodulation and restore the video/audio signal.
Wherein, this receiving system, also comprise: second antenna element (21), it be built in that a kind of non-in receiving system (RX1) shell expose antenna assembly, it is made up of chip aerial (Patch Antenna), antenna match substrate (PCB) and antenna radio frequency cable, in order in configuration design, the constraint and the restriction that are not subjected to common external antenna and are run into.
Wherein, this receiving system (RX1) comprising: built-in I
2Second controller unit (20) of C (Inter IC Communication Protocol) universal serial bus driver, the remote-control data that second remote control transmitter (27) that infrared receiver (26) is received by data wire (216) transmits, carry out recompile, and adopt the coded system of the short frame structure that is suitable for the wireless radiofrequency transmission.
Wherein, this receiving system (RX1), comprise the second data transmit-receive unit (21), will be from the coding of data wire (214) by the short frame structure of second controller unit (20) output, carry out the chnnel coding of Manchester (Machester) again, in order to improve the antijamming capability of data channel, reduce the error rate.
Wherein, this receiving system, comprise second controller unit (20), it is at the time slot of program running, can periodically produce and be used for signal that data channel is detected, and,, transmit to the first data transmit-receive unit (11) through channel appointed path F2 by the described second data transmit-receive unit (21); When first controller unit (10) passes through the first data transmit-receive unit (11) and process data wire (104), after receiving this detection signal, will be by the described first data transmit-receive unit (11), through the second channel path of appointment F2, described second data transmit-receive unit (21) and second controller unit (20) are given in back pass; To finish the two-way communication of detecting data.
Wherein, this receiving system comprises second controller unit (20) after receiving the back pass answer signal, can send drive signal to described second display unit (203).
Wherein, this receiving system comprises: built-in I
2Second controller unit (20) of C (Inter IC Communication Protocol) universal serial bus driver, the remote-control data that second remote control transmitter (27) that infrared receiver (26) is received by data wire (216) transmits, carry out recompile, and pass through data wire (214) to the second data transmit-receive unit (21), through channel appointed path F2, transmit to the first data transmit-receive unit (11); When first controller unit (10) passes through the first data transmit-receive unit (11) and process data wire (104), after receiving this guidance command, will be by the first data transmit-receive unit (12), through channel appointed path F2, to receive the information of guidance command, described second data transmit-receive unit (21) and second controller unit (20) are given in back pass; To finish the acknowledge communication of remote-control data.
Wherein, second controller unit (20) in this receiving system behind the remote control answer signal of receiving from the first data transmit-receive unit (12), can send and the corresponding video data of remote information to second display unit (203), and give demonstration.
Effect
1. realize the user in two rooms of same building thing with low cost, can be by the wish of oneself, the take what one needs wireless TV reception in ground or other video/audio program, and do not disturb mutually.
2. realize blocking up and disturbing of sensing channel environment at any time, greatly reduced the blindness of user when operation, improved the validity of straighforward operation.
3. be not subjected to the restriction of traditional external antenna, make appearance design freer, more flexible.
Following conjunction with figs. elaborates to specific embodiments of the present invention.
Description of drawings
Fig. 1 is the block diagram of known wireless video/audio R-T unit
Fig. 2 is the block diagram of video/audio of the present invention, the wireless transmission of multi-system television and control device
Fig. 3 is the block diagram of second controller unit in the receiving system of the present invention
Fig. 4 is the block diagram of first controller unit in the emitter of the present invention
Fig. 5 is the frame format figure of traditional remote control coding signal
Fig. 6 is the frame format structure chart of the present invention to the code signal recompile of traditional remote control
Whether Fig. 7 is unimpeded for detecting data channel of the present invention, realizes the software flow pattern of two-way communication
Embodiment
With reference to figure 2, at a part of C1 of building, two inner rooms, as: living room R1 and bedroom R2; The relative position in two rooms both can be at same floor, again can be in contiguous floors up and down, as: duplex dwelling house or villa dwelling house.The present invention is made up of an emitter TX1 and a receiving system RX1 and second Infrared remote controller 27.
Emitter TX1 is positioned over living room R1, from outside closed-circuit television socket CATV, is connected by the RF input of radio frequency cable 114 with the RF tuner pack 12 of emitter TX1 inside; Another RF output of this RF tuner pack 12, the RF signal after the process internal distribution, be connected with the outside first display unit TV1 by radio frequency cable 115, this first display unit TV1 both can be an ordinary television receiver, can also be the television indicator of band RF terminal.The present invention is by above-mentioned connection, can be with lower cost, only utilize a closed-circuit television socket, solved under need not the situation of external radio frequency distributor, can realize impedance matching the RF signal a road drag the distribution purpose of multichannel, thereby guarantee user at living room R1, can utilize the first outside infrared remote controller RC, cooperate the first display unit TV1, freely use the first infrared remote controller RC, freely control and normally watch the closed-circuit television program.
Except that the program source from closed-circuit television CATV socket, other has video/audio source VA1, can do the signal source and use.This video/audio source VA1, can be any one or several composition of following equipment, as: satellite television receiver (SAT-STB), digital video disk (DVD) and (VCD), video tape recorder (VTR), optical charge coupled apparatus (CCD) and complementary metal oxide semiconductor element (CMOS) etc.This video/audio source VA1 by video/audio cable 116, is connected with an input of video/audio switch unit 13 in the emitter TX1; Another input of video/audio switch unit 13 is with RF tuner pack 12, link to each other through the video/audio lead-out terminal of the TV programme of demodulation output; After selecting output by video/audio switch unit 13,, export video/audio transmitter unit 14 to, be used for mode, and be the carrier wave of frequency with F1 with radio modulation with wherein one tunnel of two-way video/audio signal, by first antenna element 15 to spatial emission; Carrier frequency F1 can be in the ISM wave band, as any one Frequency point in any one wave band of 2.4GHz or 5.7GHz.
The first above-mentioned antenna element 15 is a kind of built-in antennas, particularly, is made up of chip aerial (PatchAnttena), antenna mounting panel (Anttena PCB) and cable; The polarization mode of chip aerial (Patch Anttena) can be any in circular polarization or the linear polarization mode; It is good that the length of cable should be selected to adopt 1/4 λ of above-mentioned F1 frequency wavelength.Adopt the embodiment scheme of first antenna element 15, be in order to break away from of the restriction of used usually external antenna structure to configuration design, improve the flexibility and the degree of freedom of the configuration design of emitter TX1, but also design cost and manufacturing cost in order to reduce the profile mould.
By the modulated carrier of emitter TX1 through 15 emissions of first antenna element, the second interior antenna element 22 of receiving system RX1 that is set at bedroom R2 receives, and received signal delivered to video/audio receiving element 23, with with the identical frequency process of emitter TX1, it promptly is frequency with F1, carry out the radio demodulation, signal after demodulation, be sent to video/audio processing unit 24, standard is handled and the extraction and the adjustment of electrical quantity in order to the video/audio signal of input is done, as: row, frame synchronizing signal are extracted the identification signal when being used for automatic channel selection with generation; Amplitude to the video/audio signal is adjusted respectively, then through video/audio interface unit 25, and by video/audio cable 210, is connected with the video/audio port of the outside second display unit TV2; Thereby reach the purpose that restores modulated image, voice signal, and externally on the second display unit TV2, reappear video/audio program from emitter TX1; This second display unit TV2 can also be the television indicator of band video/audio port with the ordinary television receiver of video/audio port.
The second above-mentioned antenna element 22 is a kind of built-in antennas, particularly, is made up of chip aerial (PatchAnttena), antenna mounting panel (Anttena PCB) and cable; The polarization mode of chip aerial (Patch Anttena) can be any in circular polarization or the linear polarization mode; It is good that the length of cable should be selected to adopt 1/4 λ of above-mentioned F1 frequency wavelength.Adopt the technical scheme of second antenna element 22, be in order to overcome of the restriction of used usually external antenna structure to configuration design, improve the flexibility and the degree of freedom of the configuration design of receiving system RX1, thereby reduce the design cost and the manufacturing cost of profile mould.
Utilize video/audio of the present invention, the wireless transmission of multi-system television and control device, make the user who is positioned at bedroom R2, can pass through second infrared remote-control emitter 27, control is arranged in the emitter of living room R1, make its controlled selection or connection from the TV programme of closed-circuit television terminal CATV, perhaps connect image, voice signal from video/audio source VA1; If the selection TV reception, the user of bedroom R2 can also be to being arranged in the emitter TX1 of living room R1, carry out following control, as: channel setting changed, channel selection automatically, the power supplys of open and close emitter TX1 etc., the embodiment that relates to control will describe in detail below.
During use, be positioned at the user of living room R1 and be positioned at the user of bedroom R2, can be simultaneously infrared remote-control emitter RC or 27 by separately, by own wish, take what one needs, watch without interfering with each other and listen to.
In the R2 of bedroom, be provided with second infrared remote-control emitter 27, its receiving system RX1 in chummery, the carrier signal of remote control command is carried in emission, the infrared receiver 26 that this signal is received in the device RX1 receives and demodulates the remote-control data code stream, enters second controller unit 20 and decodes through data wire 216 then.
With reference to figure 3, can see the embodiment of second controller unit 20.Second controller unit 20 is by MCU201, second wave band setting 202, display unit 203, E
2PROM204 forms.Second wave band setting 202 is used to determine the frequency of F1, generally, has four Frequency points to select; Congestion status of channel value, volume value and reflection data channel that display unit 203 is used to show that MCU201 transmits behind data validation (shaking hands) etc.; E
2PROM204 is used to store the channel sequence table after automatic channel selection is operated; MCU201 is that inside has I
2The microcontroller of C bus driver ability.
Return Fig. 2, controller unit 20 is delivered to the second coding/decoding unit 211 to the remote control coding PE through the converted frames form by data wire 214, in order to make chnnel coding; Present embodiment adopts Manchester (Machester) encoding scheme, and the data baud rate adopts 4800; The purpose of chnnel coding remains for the letter that the improves channel/ratio of making an uproar, and improves the antijamming capability of transfer of data; The second coding/decoding unit 211 is delivered to the 2nd UHF Transmit-Receive Unit 212 to the code stream after the chnnel coding, and with the carrier frequency date number modulation of F2, its frequency F2 can be any in the 433MHzISM wave band.
Carry the modulated carrier of guidance command, received and deliver to a UHF Transmit-Receive Unit 112 by the UHF antenna 113 in the emitter TX1 among the living room R1, after its amplification, demodulation, deliver to the first coding/decoding unit 111, do Manchester (Machester) decoding, after restoring the Data Base band signal, through data wire 104 it is delivered to first controller unit 10 again and decipher.
With reference to figure 4, can see the embodiment of first controller unit 10, this unit is made up of wave band setting the 102, the one MCU101, display unit 103; First wave band setting 102 is used to determine the frequency of F1, generally, has four Frequency points available; Display unit 103 is used to show the operating state of emitter TX1, as: whether energising/outage, signal lock etc.; MCU101 is that inside has I
2The microcontroller of C bus driver ability.
Return Fig. 2, the control command after 10 decodings of first controller unit is through an I
2C bus 100 is to hanging over an I equally
2 RF tuner pack 12 on the C bus 100 sends the parameter adjustment order, as: change the power supply of channel, channel selection automatically, ON/OFF emitter TX1 etc.; Control command after 10 decodings of first controller unit is in addition through an I
2C bus 100 sends the still switching command of video/audio signal (A/V) of selection TV signal (TV) to video/audio switch unit 13; Control command after 10 decodings of first controller unit is also in addition through an I
2C bus 100 to video/audio transmitter unit 14, sends the instruction of carrier wave F1 frequency division value, is used to control the work of inner phase-locked loop.
Because controlled in wireless is different from after all line traffic control is arranged, wireless signal can be subjected to the interference of environment inevitably; As building to the shielding of signal and reflection, frequently adjacent/with interference, the non-linear modulation of space communication signal and multipath effect of signal frequently or the like, the capital causes useful signal---the letter of channel circumstance/make an uproar and compare rapid deterioration, its consequence is that useful signal can not finally arrive the destination; This means; user in the R2 of bedroom; when using second infrared remote-control emitter 27; because the unpredictability of disturbing; if just suffering external interference this moment, the Control Failure of second infrared remote-control emitter 27 then takes place through regular meeting, perhaps bad during fashion; the blindness that causes the user to use tends to be at a loss.
Because it is inevitably that wireless channel is subjected to disturb, present at least technical merit still can not be effected a radical cure solution with means cheaply.
Therefore, video/audio provided by the present invention, the wireless transmission of multi-system television and control device can improve the blindness when using, even can be disturbing the influence to the user to drop to minimum.
With reference to figure 2, can see that first data transmit-receive unit 11 among the emitter TX1 and the second data transmit-receive unit 21 among the receiving system RX1 adopt the two-way communication mode; With reference to figure 6, shown the software flow pattern of two-way communication; Its effect has two:
One: as a side (as: the second data transmit-receive unit 21) of communications of control data, must wait until that recipient (as: the first data transmit-receive unit 11) returns the answer signal of receiving data after, could carry out corresponding action; As: the infrared receiver 26 in receiving system RX1, receive the user who is positioned at bedroom R2, when using the guidance command that infra-red remote control transmitter 27 sent, through the reception and the demodulation of infrared receiver 26, demodulated guidance command by data wire 216, is delivered to controller unit 20;
With reference to figure 3, MCU201 in the controller unit 20 is behind the guidance command that receives from data wire 212, voluntarily guidance command is deciphered, simultaneously in predetermined frame structure mode, the long frame data structure (with reference to the top of figure 4) of former guidance command is transformed into the short frame structure coding (with reference to the bottom of figure 4) of in the future suitable wireless transmission, by the control of clock frequency, short frame structure coded system in time, and is short more a lot of than the long frame data structure of former guidance command.
Get back to Fig. 2, controller unit 20 is short frame structure coding PE, through data wire 214, deliver to the second coding/decoding unit 211 in the second data transmit-receive unit 21, after carrying out Manchester (Manchester) chnnel coding, again to the ripple modulation of refusing to take a passenger of counting of the 2nd UHF Transmit-Receive Unit 212, and, launch to Radio Link through the frequency of the 2nd UHF antenna 213 with carrier wave F2.
Emitter TX1, by the UHF antenna 113 in the first data transmit-receive unit 11, modulated carrier F2 from Radio Link, deliver to a UHF Transmit-Receive Unit 112 and do demodulation, deliver to the first coding/decoding unit 111 again and carry out channel-decoding, after having carried out Manchester (Manchester) channel-decoding, the short frame structure of the reduction of the demodulation PE that encodes, deliver to first controller unit 10 through data wire 104.
With reference to the MCU101 in figure 3, the first controller units 10, the short frame structure coding PE from data wire 104 deciphers; If the result of decoding is: control channel channel selection operation, then MCU101 is by an I
2C bus 100 is sent write operation, address control, frequency dividing ratio order to RF tuner pack 12; Still pass through simultaneously I
2 C bus 100, to RF tuner pack 12, send the read operation order,, whether be in the phase place normal lock state in order to determine RF tuner pack 12, if phase-locked signal occurs, MCU101 then can send drive signal to first display unit 103, and 103 a certain colors with dichromatic LED of first display unit are as green, the expression phase place is locked, and operating state is normal; Otherwise, if become redness, then represent operation irregularity, phase-locked failure.
Get back to Fig. 2, the MCU101 in first controller unit 10 is also by an I
2C bus 100 to video/audio switch unit 13, video/audio transmitter unit 14, is sent control command respectively, as: the switching in video/audio source, video/audio modulated carrier F1 determine etc.; Another task of MCU101 in first controller unit 10, be exactly by data wire 104, the short frame structure coding PE that has received, reply data frame with one group short identical frame structure coding PE, send the first coding/decoding unit 111 in the first data transmit-receive unit 11 to carry out Manchester (Manchester) chnnel coding, send a UHF Transmit-Receive Unit 112 to carry out modulate emission then, and modulated carrier F2 is delivered to Radio Link by UHF antenna 113.
Receiving system RX1, modulated answer signal from Radio Link, receive from the 2nd UHF antenna 213, after delivering to the 2nd UHF Transmit-Receive Unit 212 and doing demodulation, deliver to the second coding/decoding unit 211 again and carry out Manchester (Manchester) channel-decoding, the reply data frame that restores is delivered to second controller unit 20.
With reference to figure 3, MCU201 in second controller unit 20, the reply data frame that transmits by data wire 214 is deciphered, and make comparisons by the remote-control data that the second data transmit-receive unit 21 sends with the last time, as meet, MCU201 is executive control operation then, as: by driving second display unit 203, change the current show value of its channel; As do not meet, MCU201 then can pass through data wire 214 again, retransmits the last short frame structure coding PE through the second data transmit-receive unit 21 automatically to Radio Link; If the reply data frame that the first data transmit-receive unit 11 is beamed back, then MCU201 executive control operation are received in the second data transmit-receive unit 21; If still can not receive the reply data frame, perhaps Frame is different with the last short frame structure coding PE, and then the MCU201 refusal is operated, and still keeps original state; Can be set in advance in E as for the number of times of retransmitting short frame structure coding PE
2Among the PROM204.
Its two: with reference to figure 2, if, when not having to transmit the short frame structure coding PE that is used to control, second controller unit 20 in the receiving system RX1, can be in the time slot that program is carried out, the coding that periodically a frame is used for the detecting data channel by the second coding/decoding unit 211, is launched through the 2nd UHF Transmit-Receive Unit 212 and UHF antenna 213.If channel conditions is good, first controller unit 10 in the emitter TX1, can be deciphered the coding that is used for the detecting data channel that comes from a UHF antenna 113, a UHF Transmit-Receive Unit 112, the first coding/decoding unit 111, and then by first controller unit 10, automatically the signal flow of the answer signal of confirming to receive detection signal by the first coding/decoding unit 111, a UHF Transmit-Receive Unit 112, a UHF antenna 113 to launching.
At this moment, if press signal pathway in the receiving system RX1, from the 2nd UHF antenna 213, the 2nd UHF Transmit-Receive Unit 212, the second coding/decoding unit 211, receive the answer signal of detection signal after, then can it be delivered to controller unit 20 by data wire 214.
With reference to figure 3, the MCU201 in the controller unit 20 then drives the status indicator lamp of second display unit 203 behind the answer signal that whenever receives a detection signal, as: LED is lighted once; So circulation is gone down, and second display unit 203 that is used for the state indication is repeated to light, and represents that then wireless channel is unobstructed, and at this moment, control signal can arrive the destination uninterruptedly; Second display unit 203 of state indication does not work or glittering interval prolongs if be used for, represent that then wireless channel is just suffering serious interference or exceeding normal service range, remind the user should not carry out straighforward operation this moment, can pass through appropriate change receiving position or receive direction, till the state indication recovers normal flicker.
The above; be a kind of of preferred embodiment of the present invention; but be not to be used for limiting practical range of the present invention, promptly every equalization of being done according to the described feature of claim of the present invention, structure, spirit changes and modifies, and all belongs within protection scope of the present invention.
Claims (13)
1. a video/audio, the wireless transmission of multi-system television and control device comprise:
One emitter (TX1), it comprises: the RF tuner pack (12) that is connected with outside CATV RF terminal by RF cable (114), another RF output handle of this RF tuner pack (12) is through the RF signal after the internal distribution, be connected with outside first display unit (TV1) by radio frequency cable (115), this first display unit TV1 both can be an ordinary television receiver, can also be the television indicator of band RF terminal; This RF tuner pack (12) output interface links to each other with an end of video/audio switch unit (13); Video/audio switch unit (13) also is linked in sequence with video/audio transmitter unit (14), first antenna element (15); Another input terminal of video/audio switch unit (13) is connected with outside video/audio source (VA1) by video/audio cable (116); Described emitter (TX1) also comprises first controller unit (10), and it carries out data by data wire (104) with the first data transmit-receive unit (11) and is connected; The described first data transmit-receive unit (12) then comprises: the first coding/decoding unit (111) that is connected with first controller unit (10) and between first a UHF Transmit-Receive Unit (112) of compiling/separating between unit (111) and the UHF antenna (113); The described first data transmit-receive unit (11) is used for setting up the approach that data communication is a purpose between emitter (TX1) and receiving system (RX1); And:
One receiving system (RX1), it comprises: the processing unit (24) of second antenna element (22) that is linked in sequence, video/audio receiving element (23), look/frequently, look audio output interface (25), in order to receive, to separate the carrier signal of carrying the video/audio content that the menstruation regulating Radio Link transmits, and is connected with outside second display unit (TV2) by video/audio output interface (25) and video/audio cable (210), in order to demonstration with listen to from the image and the sound signal of emitter (TX1) transmission; Second display unit (TV2) can be the television receiver or the TV display of band video/audio Interface Terminal; Described receiving system (RX1) also comprises: carry out second controller unit (20) that data are connected by data wire (214) with the second data transmit-receive unit (21); The described second data transmit-receive unit (21), then comprise: through the described second data transmit-receive unit (21) of the second coding/decoding unit (211), the 2nd UHF Transmit-Receive Unit (212), the 2nd UHF antenna (213) that data wire (214) is connected with second controller unit (20), be used between described receiving system (RX1) and emitter (TX1), in order to set up the approach of data communication; Described second controller unit (20) also is connected with infrared receiver (26) with video/audio processing unit (24) respectively by data wire (215) (216); Described receiving system (RX1) also comprises: second infrared remote-control emitter (27) that is used to control.
2. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described emitter, wherein, described RF tuner pack (12) be that a kind of current collection is looked tuning, intermediate frequency amplifies, the video/audio demodulation function and be integrated in incorporate tuner pack in the same metal shielding; In order to TV RF signals directly is demodulated to the video/audio signal; Described RF tuner pack (12) also has RF input, two ports of output, and its RF input port is connected with closed-circuit television signal plug (CATV) by radio frequency cable (114); The RF output port can directly link to each other with the antenna input of outside first display unit (VA1) by radio frequency cable (115); Described RF tuner pack (11) also is used for two or more television systems are received and demodulation.
3. video/audio according to claim 1, the wireless transmission of multi-system television and control device is characterized in that: described emitter (TX1) also comprises: built-in I
2First controller unit (10) of C (Inter IC Communication Protocol) universal serial bus driver, it passes through I
2C universal serial bus (100) respectively with have I
2The RF tuner pack (12) of C serial bus interface, video/audio switch unit (13), video/audio transmitter unit (14) carry out bus type and connect; Its effect is to pass through I
2The C universal serial bus is selected the video/audio signal of desire modulation output by control command, and in the mode of radio modulation, carries the carrier signal of video/audio content to the Radio Link emission through first antenna element (15).
4. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described emitter (TX1), wherein, described first antenna element (14) is characterized in that: be built in that a kind of non-in the described emitter shell expose antenna assembly; It is made up of chip aerial (PatchAntenna), antenna match substrate (PCB) and antenna radio frequency cable, in order in configuration design, and the constraint and the restriction that are not subjected to common external antenna and are run into.
5. video/audio according to claim 1, wireless transmission of multi-system television and control device, it is characterized in that: described emitter (TX1), wherein, the described first data transmit-receive unit (11), function with data double-way communication: in order to receive and the described receiving system of demodulation (RX1) in the second data transmit-receive unit (21) launched carry data that are used for sensing channel or the carrier wave that contains control command, the answer signal of data that receive this modulated carrier and order, the second data transmit-receive unit (21) in the described receiving system (RX1) is given in back pass again.
6. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described receiving system comprises: built-in I
2Second controller unit (20) of C (Inter IC Communication Protocol) universal serial bus driver, it passes through I
2C universal serial bus (200) respectively with have I
2The video/audio receiving element (23) of C serial bus interface, video/audio processing unit (24) carry out bus type and connect; Its effect is by control command, will receive from the carrier wave that carries the video/audio signal of Radio Link, demodulation and restore the video/audio signal.
7. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described receiving system, also comprise: described second antenna element (21), it is characterized in that: be built in that a kind of non-in described receiving system (RX1) shell expose antenna assembly, it is made up of chip aerial (PatchAntenna), antenna match substrate (PCB) and antenna radio frequency cable, in order in configuration design, the constraint and the restriction that are not subjected to common external antenna and are run into.
8. video/audio according to claim 1, the wireless transmission of multi-system television and control device is characterized in that: described receiving system (RX1) comprising: built-in I
2Second controller unit (20) of C (Inter IC Communication Protocol) universal serial bus driver, the remote-control data that second remote control transmitter (27) that infrared receiver (26) is received by data wire (216) transmits, carry out recompile, and adopt the coded system of the short frame structure that is suitable for the wireless radiofrequency transmission.
9. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described receiving system (RX1), wherein, the described second data transmit-receive unit (21), will be from the coding of data wire (214) by the short frame structure of second controller unit (20) output, carry out the chnnel coding of Manchester (Machester) again,, reduce the error rate in order to improve the antijamming capability of data channel.
10. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described receiving system (RX1), wherein, described second controller unit (20) is at the time slot of program running, can periodically produce one and be used for signal that data channel is detected, and,, transmit to the first data transmit-receive unit (11) through the first channel path F2 of appointment by the described second data transmit-receive unit (21); When first controller unit (10) passes through the first data transmit-receive unit (11) and process data wire (104), after receiving this detection signal, will be by the described first data transmit-receive unit (12), through the first channel path F2 of appointment, described second data transmit-receive unit (21) and second controller unit (20) are given in back pass; To finish the two-way communication of detecting data.
11. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described receiving system, wherein, described second controller unit (20) can send drive signal to described second display unit (203) after receiving the back pass answer signal.
12. video/audio according to claim 1, the wireless transmission of multi-system television and control device is characterized in that: described receiving system, wherein, built-in I
2Second controller unit (20) of C (Inter IC Communication Protocol) universal serial bus driver, the remote-control data that second infrared remote-control emitter (27) that infrared receiver (26) is received by data wire (216) transmits, carry out recompile, and pass through data wire (214) to the second data transmit-receive unit (21), through the first channel path F2 of appointment, transmit to the first data transmit-receive unit (11); When first controller unit (10) passes through the first data transmit-receive unit (11) and process data wire (104), after receiving this guidance command, will be by the described first data transmit-receive unit (11), the first channel path F2 through appointment, to receive the information of guidance command, described second data transmit-receive unit (21) and second controller unit (20) are given in back pass; To finish the acknowledge communication of remote-control data.
13. video/audio according to claim 1, the wireless transmission of multi-system television and control device, it is characterized in that: described receiving system, wherein, described second controller unit (20) is behind the remote control answer signal of receiving from the first data transmit-receive unit (11), send and the corresponding video data of remote information to described second display unit (203) simultaneously, and give demonstration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310107884 CN1607736A (en) | 2003-10-14 | 2003-10-14 | Wireless transmission and controlling apparatus for video/ audio, multi-system TVs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310107884 CN1607736A (en) | 2003-10-14 | 2003-10-14 | Wireless transmission and controlling apparatus for video/ audio, multi-system TVs |
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| Publication Number | Publication Date |
|---|---|
| CN1607736A true CN1607736A (en) | 2005-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310107884 Pending CN1607736A (en) | 2003-10-14 | 2003-10-14 | Wireless transmission and controlling apparatus for video/ audio, multi-system TVs |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783944B (en) * | 2009-01-14 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Wireless image and electric power transmission device and wireless image and electric power transmission method |
| CN103152532A (en) * | 2011-12-07 | 2013-06-12 | 天津港保税区世纪龙科技发展有限公司 | Integrated audio/video microwave wireless monitoring transceiver |
| TWI403105B (en) * | 2009-02-27 | 2013-07-21 | Hon Hai Prec Ind Co Ltd | Image/video signal and electrical energy wireless transmitting apparatus and method thereof |
| CN110189511A (en) * | 2019-05-24 | 2019-08-30 | 深圳市朗强科技有限公司 | A kind of signal receiving device, wireless transmitting system and signal switching method |
-
2003
- 2003-10-14 CN CN 200310107884 patent/CN1607736A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783944B (en) * | 2009-01-14 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Wireless image and electric power transmission device and wireless image and electric power transmission method |
| TWI403105B (en) * | 2009-02-27 | 2013-07-21 | Hon Hai Prec Ind Co Ltd | Image/video signal and electrical energy wireless transmitting apparatus and method thereof |
| CN103152532A (en) * | 2011-12-07 | 2013-06-12 | 天津港保税区世纪龙科技发展有限公司 | Integrated audio/video microwave wireless monitoring transceiver |
| CN110189511A (en) * | 2019-05-24 | 2019-08-30 | 深圳市朗强科技有限公司 | A kind of signal receiving device, wireless transmitting system and signal switching method |
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