CN102402851A - Remote controller, receiver and sound remote control method - Google Patents
Remote controller, receiver and sound remote control method Download PDFInfo
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- CN102402851A CN102402851A CN2010102866814A CN201010286681A CN102402851A CN 102402851 A CN102402851 A CN 102402851A CN 2010102866814 A CN2010102866814 A CN 2010102866814A CN 201010286681 A CN201010286681 A CN 201010286681A CN 102402851 A CN102402851 A CN 102402851A
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Abstract
The invention relates to a remote controller, a receiver, and a sound remote control method corresponding to the remote controller and the receiver. The remote controller uses a plurality of carrier modulation remote control signals with different frequencies according to a preset program, and transmits the modulated remote control signals to air in the sound manner. The receiver receives the remote control signals transmitted in the sound manner in the air, performs filtering for the remote control signals, demodulates the remote control signals according to a preset program, and then performs corresponding remote control actions according to the demodulated remote control signals.
Description
Technical field
The invention relates to a kind of telepilot, receiver and remote control thereof, and particularly relevant for using sound to transmit a kind of telepilot, receiver and the remote control thereof of remote signal.
Background technology
Televisor and STB are constantly progressive, and function is more and more, and for example some machine provides and surfs the web and function such as community's friend-makings, therefore to the also raising gradually of requirement of telepilot.Traditional remote controller only need transmit simple control command, and present telepilot need transmit more complicated control command and Word message, and for example online is searched or friend-making chat all needs input characters.
Traditional remote controller is used infrared signal, and infrared signal has directivity.If require the user online or when typewriting always with telepilot pointed at television machine or STB, can cause many inconvenience.
Wi-Fi or the employed wireless signal of blue bud (Bluetooth) are not had a directivity.Existed on the market and had hand-write input function and use Wi-Fi or blue bud telepilot as transmission means; But the cost of these telepilots itself is very high; Relative, STB and televisor also need blue bud module, the related cost that has increased televisor and STB.
If use the smart mobile phone that has Wi-Fi or blue tooth function as telepilot, STB and televisor need blue bud module equally, still can increase cost.Blue bud mobile phone needs pairing when connecting blue bud STB, very not convenient concerning the user who is unfamiliar with this operation.
Summary of the invention
The present invention provides a kind of telepilot, receiver and corresponding sound remote control thereof; Utilize electronic installations such as mobile phone directly to send sound to air; As remote signal,, can solve the directivity and the cost problem of traditional remote controller with receivers such as control televisor or STBs.
The present invention proposes a kind of telepilot, comprises modulator and acoustical generator.Modulator is according to preset modulation program and the different a plurality of carrier modulation remote signals of frequency of utilization.Above-mentioned a plurality of carrier wave produces for cutting apart a predeterminated frequency section.Acoustical generator couples modulator, and the remote signal after will modulating with form of sound is sent in the air.Airborne remote signal is received by a receiver.This receiver is according to the preset demodulation process demodulation remote signal of the above-mentioned preset modulation program of correspondence, and carries out corresponding remote control actions according to the remote signal after the demodulation.
In one embodiment of this invention; Modulator is encoded to remote signal a plurality of significant bits (bit) of first quantity; Utilize error correcting code remote signal to be encoded to a plurality of correction bits of second quantity; And with above-mentioned a plurality of carrier modulation remote signals, make each above-mentioned carrier wave carry at least above-mentioned a plurality of significant bit and above-mentioned a plurality of correction bits one of them.
In one embodiment of this invention, above-mentioned acoustical generator comprises wireless launcher and wireless headset.Wireless launcher couples modulator, uses the remote signal after the wireless communication protocol emission is modulated.Wireless headset uses wireless communication protocol to receive the remote signal that wireless launcher is launched, and the remote signal after will modulating with form of sound is sent in the air.
In one embodiment of this invention, if in a preset period of time, there is not remote signal to send, then modulator sees through wireless launcher and sends null symbol to wireless headset.Above-mentioned preset period of time gets into the stand-by period of holding state less than wireless headset.
In another embodiment of the present invention, above-mentioned acoustical generator comprises loudspeaker.These loudspeaker couple modulator, and the remote signal after will modulating with form of sound is sent in the air.
The present invention proposes a kind of receiver in addition, and this receiver comprises microphone and detuner.The remote signal that transmits with form of sound in the microphone admission of air, this remote signal is from above-mentioned telepilot.Detuner couples microphone, according to the preset demodulation process demodulation remote signal of the above-mentioned preset modulation program of correspondence.The remote signal of above-mentioned receiver after according to demodulation carried out corresponding remote control actions.
In one embodiment of this invention, above-mentioned receiver more comprises first wave filter.First wave filter is coupled between microphone and the detuner, and filtering remote signal medium frequency is less than the part of the lower-frequency limit of predeterminated frequency section.
In one embodiment of this invention, above-mentioned also filtering remote signal of first wave filter medium frequency is greater than the part of the upper frequency limit of above-mentioned predeterminated frequency section.
In one embodiment of this invention, above-mentioned receiver more comprises audio player and loudspeaker.Audio player provides the sound signal of TV programme.Loudspeaker couple audio player, play above-mentioned sound signal with form of sound.
In one embodiment of this invention, above-mentioned receiver more comprises echo canceller.Echo canceller is coupled between microphone, detuner and the audio player.Echo canceller carries out convolution algorithm with the echo channel shock response of sound signal and estimation; The echo signal that obtains estimating; From remote signal, deduct echo signal then, the above-mentioned result who deducts is provided to detuner and carries out demodulation as offsetting remote signal after the echo.
In one embodiment of this invention, above-mentioned receiver more comprises second wave filter.Second wave filter is coupled between audio player and the loudspeaker, and the above-mentioned sound signal medium frequency of filtering is greater than the part of the lower-frequency limit of above-mentioned predeterminated frequency section.
In another embodiment of the present invention, the above-mentioned above-mentioned sound signal medium frequency of the second wave filter filtering is greater than the lower-frequency limit of above-mentioned predeterminated frequency section and less than the part of the upper frequency limit of above-mentioned predeterminated frequency section.
The present invention proposes a kind of sound remote control thereof in addition, and the method is carried out by above-mentioned telepilot and receiver, comprises the following steps.At first, telepilot is according to preset modulation program and the different a plurality of carrier modulation remote signals of frequency of utilization, and the remote signal after telepilot will be modulated with form of sound then is sent in the air.The remote signal that transmits with form of sound in the receiver admission of air according to above-mentioned preset demodulation process demodulation remote signal, is carried out corresponding remote control actions according to the remote signal after the demodulation then.
Based on above-mentioned, as remote signal, sound does not possess directivity with airborne sound in the present invention, so can solve the directional problems of traditional infrared signal.The microphone that receiver of the present invention is built in using receives remote signal, does not need communication modules such as Wi-Fi or blue bud, can effectively reduce cost.
Description of drawings
For let above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, elaborate below in conjunction with the accompanying drawing specific embodiments of the invention, wherein:
Fig. 1 is the calcspar according to a kind of audio remote control device of one embodiment of the invention.
Fig. 2 and Fig. 3 are the calcspars of the acoustical generator in the middle of Fig. 1.
Fig. 4 and Fig. 5 are the process flow diagrams according to a kind of sound remote control thereof of one embodiment of the invention.
Fig. 6 is the calcspar of the modulator in the middle of Fig. 1.
Fig. 7 is the calcspar of the detuner in the middle of Fig. 1.
The main element symbol description:
100: audio remote control device
110: telepilot
111: modulator
112: digital to analog converter
113: acoustical generator
130: receiver
131: microphone
132: wave filter
133: analog to digital converter
134: echo canceller
135: detuner
136: audio player
137: wave filter
138: digital to analog converter
139: loudspeaker
210: loudspeaker
310: wireless launcher
320: wireless headset
410～490,510～540: process step
610: signal coder
620: error correcting encoder
630: multi-carrier modulator
640: the inverse-Fourier transform device
650: the null symbol unit
660: the training symbol unit
710: windows units
720: Fourier transformer
730: seek the unit
740: balanced device
750: decision device
760: error correction decoder
Embodiment
Fig. 1 is the calcspar according to a kind of audio remote control device 100 of one embodiment of the invention.Audio remote control device 100 comprises telepilot 110 and receiver 130.Telepilot 110 comprises modulator 111, digital to analog converter 112 and the acoustical generator 113 that tandem in regular turn couples.Receiver 130 comprises microphone 131, wave filter 132, analog to digital converter 133, echo canceller 134 and the detuner 135 that tandem in regular turn couples.Receiver 130 also comprises audio player 136, wave filter 137, digital to analog converter 138 and the loudspeaker 139 that tandem in regular turn couples.Wherein echo canceller 134 is coupled between detuner 135, analog to digital converter 133 and the wave filter 137.The telepilot 110 of present embodiment can be the hand-hold electronic device of the sent sound of mobile phone, MP3 player or plane notebook computer and so on, and receiver 130 can be TV programme play of televisor or STB and so on and the electronic installation that can accept remote control.
Fig. 4 and Fig. 5 are the process flow diagrams of the performed sound remote control thereof of the audio remote control device 100 of present embodiment.Wherein Fig. 5 illustrates the flow process that receiver 130 is play TV programme sound.At first, the audio player 136 of receiver 130 provides the sound signal of TV programme, just the dubbing of TV programme (step 510).137 pairs of sound signals of wave filter are carried out Filtering Processing (step 520); Digital to analog converter 138 converts sound signal to simulating signal (step 530) from digital signal; Loudspeaker 139 convert sound signal into sound wave from electric wave then, with form of sound playing audio signal (step 540).
The sound that one of characteristic of present embodiment is to use people's ear to hear carries out remote control; Receiver 130 will be play the sound of TV programme on the one hand; To receive the voice signal that telepilot 110 sends on the other hand; Both frequencies are all in the audiorange that people's ear can be heard, so the program sound that receiver 130 is play can receive by self, constitute the main interference source of audio remote control device 100.Disturb for fear of this, wave filter 137 can be when receiver 130 be play the sound of TV programme the used frequency of remote signal of filtering telepilot 110.To transmit remote signal, this predeterminated frequency section comprises the audiorange from frequency preset lower limit to the frequency preset upper limit to the predeterminated frequency section of a high frequency of telepilot 110 uses of present embodiment as carrier wave.Wave filter 137 can the filtering audio player in the sound signal of 136 outputs; Frequency is greater than the part of the lower-frequency limit of predeterminated frequency section, also can a filtering sound signal medium frequency greater than the lower-frequency limit of predeterminated frequency section and less than the part of the upper frequency limit of predeterminated frequency section.
For example, if the predeterminated frequency section that telepilot 110 uses is the scope of 8KHz to 12KHz, then the lower-frequency limit of this predeterminated frequency section is 8KHz, and upper frequency limit is 12KHz.Wave filter 137 can be with the whole filterings of part more than the 8KHz in the sound signal of audio player 136 output, also can a filtering sound signal in the part of 8KHz to 12KHz.The sound frequency of TV programme and the sound frequency of telepilot 110 uses are not overlapped, to avoid interference.
Fig. 4 illustrates the flow process of telepilot 110 with sound receiver of remote-control sytem 130.At first, modulator 111 is according to preset modulation program, and the different a plurality of carrier modulation remote signals (step 410) of frequency of utilization.Wherein, above-mentioned a plurality of carrier wave is to cut apart above-mentioned predeterminated frequency section to produce.Above-mentioned remote signal can comprise the literal of control command that user's remote controller 110 is produced or user's input.Next, digital to analog converter 112 converts remote signal into simulating signal (step 420) from digital signal.Remote signal after acoustical generator 113 will be modulated converts sound wave to from electric wave, and the remote signal after will modulating with form of sound is sent to (step 430) in the air.
The acoustical generator 113 of present embodiment can adopt like Fig. 2 or framework shown in Figure 3.In the framework of Fig. 2, acoustical generator 113 comprises loudspeaker 210.Loudspeaker 210 couple digital to analog converter 112, and the remote signal after the reception digital-to-analog conversion converts remote signal to sound wave from electric wave then, with form of sound remote signal is sent in the air.According to the framework of Fig. 2, loudspeaker 210 are play-overed sound and are received for the microphone 131 of receiver 130, and remote signal can the person of being used be heard, if the sound that has that continues can cause the uncomfortable of user, so sounding just when remote signal will be sent only.
In the framework of Fig. 3, acoustical generator 113 comprises wireless launcher 310 and wireless headset 320.Wireless launcher 310 couples digital to analog converter 112, and the remote signal after the reception digital-to-analog conversion is used preset wireless communication protocol emission remote signal then.Wireless headset 320 uses same wireless communication protocol to receive the remote signal that wireless launcher 310 is launched, and converts remote signal to sound wave from electric wave then, with form of sound remote signal is sent in the air.According to the framework of Fig. 3, wireless headset 320 is to be placed directly in microphone 131 next doors, and the user can't hear the sound of remote control, does not have uncomfortable problem.
Above-mentioned wireless communication protocol can be the wireless communication technique of blue bud, ultra wideband (ultra-wideband is called for short UWB), Wi-Fi or ZigBee and so on.If adopt blue bud technology; And do not have signal to pass to blue-tooth earphone for a long time, then blue-tooth earphone possibly get into holding state, has little time when having caused remote signal to receive; So when not having remote signal to send for a long time, must send null symbol to keep blue-tooth earphone at open state.In the present embodiment, if adopt blue-tooth earphone, and in a preset period of time, do not have remote signal to send, then modulator 111 can see through wireless launcher 310 and send null symbol a to blue-tooth earphone 320.In order to prevent that blue-tooth earphone 320 from getting into holding state, above-mentioned preset period of time must get into the stand-by period of holding state less than blue-tooth earphone 320.
Get back to Fig. 4 flow process, telepilot 110 is seen off after the remote signal, the remote signal (step 440) that transmits with form of sound in microphone 131 admission of airs, and 132 pairs of remote signals of wave filter are carried out Filtering Processing (step 450) then.Wave filter 132 and wave filter 137 are the same to be the interference for fear of TV programme sound, wave filter 137 filterings that different is be above-mentioned predeterminated frequency section with interior audio frequency, and wave filter 132 filterings is the audio frequency beyond the above-mentioned predeterminated frequency section.Wave filter 132 can a filtering microphone in 131 remote signals that receive, and frequency also can be with the part in the lump filtering of remote signal medium frequency greater than the upper frequency limit of above-mentioned predeterminated frequency section less than the part of the lower-frequency limit of above-mentioned predeterminated frequency section.
Next, analog to digital converter 133 is a digital signal (step 460) with remote signal self simulation conversion of signals.134 pairs of remote signals of echo canceller are carried out echo cancelltion processing (step 470) then; Particularly be that convolution algorithm (convolution) is carried out in the sound signal that audio player 136 is provided and the echo channel shock response of estimation; The echo signal that obtains estimating; From remote signal, deduct this echo signal then, the above-mentioned result who deducts is provided to detuner 135 and carries out demodulation as offsetting remote signal after the echo through analog to digital converter 133 conversion.Echo cancelltion is the mature technology that has existed, so omissions of detail will not be given unnecessary details.
Separate; Detuner 135 is according to the remote signal of echo canceller 134 outputs; And the preset demodulation process of corresponding above-mentioned preset modulation program; From remote signal, demodulate the control command and the literal (step 480) of user's input, receiver 130 is carried out corresponding remote control actions (step 490) according to the remote signal after the demodulation then.
Fig. 6 is the calcspar of modulator 111, and above-mentioned preset modulation program just lies in the framework of Fig. 6.Modulator 111 comprises signal coder 610, error correcting encoder 620, multi-carrier modulator 630, inverse-Fourier transform device 640, null symbol unit 650 and the training symbol unit 660 that tandem in regular turn couples.Signal coder 610 receives the remote signal that users produce, and remote signal is encoded to a plurality of significant bits of a predetermined number, for example 16 significant bits.Error correcting encoder 620 utilizes an error correcting code that remote signal is encoded to a plurality of correction bits of another predetermined number, for example 15 correction bits.Above-mentioned error correcting code can be BCH code or similar error correcting code.
Next, multi-carrier modulator 630 is used above-mentioned predeterminated frequency section is cut apart and next a plurality of carrier modulation remote signals, with modes such as amplitude modulation(PAM)s, makes each above-mentioned carrier wave carry a significant bit or correction bits at least.Inverse-Fourier transform device 640 uses inverse-Fourier transform (inverse Fourier transform) that each carrier wave is converted to time domain from frequency domain.Each inverse-Fourier transform piece is called a symbol.Inverse-Fourier transform device 640 can substitute with other transducers with same transitions effect.
The symbol that carries remote signal is called significant character, and each significant character is sent the intersymbol interference (inter-symbol interference is called for short ISI) that causes with the antagonism signal reflex for twice continuously.Null symbol unit 650 when not having remote signal to send null symbol (for example all significant bits are changed to 1 entirely), to keep the blue-tooth earphone start.If do not adopt earphone or earphone can not get into holding state, then can omit null symbol unit 650.Training symbol unit 660 inserts preset a plurality of training symbols (for example all bits are changed to 1010 values that replace) in the significant character front, so that receiver 130 is estimated channels (channelestimation).
Fig. 7 is the calcspar of detuner 135, and above-mentioned preset demodulation process just lies in the framework of Fig. 7.Detuner 135 comprises windows units 710, Fourier transformer 720, balanced device (equalizer) 730, decision device 750 and the error correction decoder 760 that tandem in regular turn couples.Detuner 135 also comprises seeks unit 730, seeks unit 730 and couples windows units 710, Fourier transformer 720 and balanced device 740.
The remote signal of windows units 710 reception of echoes Cancellers 134 output below is called data 1 with this remote signal.Windows units 710 moves the window of a symbol lengths in data 1 then.Fourier transformer 720 carries out Fourier transform with the data in the window 1 and obtains data 2.Searching unit 730 carries out related operation with data 2 and training symbol and obtains correlation 1, data 2 is carried out related operation with every inverted value of training symbol (0 becomes 1,1 becomes 0) obtain correlation 2, calculates the ratio of correlation 1 and correlation 2 then.If above-mentioned ratio surpasses pre-set threshold, then seek unit 730 and be judged to be and find training symbol, getting the window position of above-mentioned ratio when maximum is the sign synchronization position.
Next, balanced device 740 usefulness training symbol calculating channel frequency responses and corresponding channel equalizer coefficients.Follow-up significant character or null symbol also can be carried out Fourier transform at Fourier transformer 720, obtain corresponding data 2, and balanced device 740 multiply by channel equalizer coefficients with above-mentioned data 2 and obtains data 3.Decision device 750 carries out hard decision with data 3 and obtains data 4.Error correction decoder 760 carries out error correction decoding (for example BCH decoding) with data 4 and obtains significant bit.Significant bit comprises user's control command or input characters, and receiver 130 can be carried out corresponding remote control actions according to this.
The preset modulation program of Fig. 6 and the preset demodulation process of Fig. 7 all are to use existing orthogonal frequency division multiplex (MUX) technology (orthogonal frequency-division multiplexing is called for short OFDM), therefore do not relate to too much details.Yet the present invention in the process of remote signal coding, modulation, transmission, demodulation and decoding, can use any prior art not as limit.
The hand-hold electronic device of the present invention's mobile phone capable of using and so on is as telepilot, and the signal of sounding is with the receiver of control televisor or STB and so on.Some televisor or STB comprise the function of accompanying video, can receive voice signal so build microphone in having.The electronic installation of mobile phone and so on all has the ability of sounding, and the cellphone subscriber also can buy wireless headset usually, and wireless headset can be placed on the microphone next door of receiver, makes receiver receive sound remote signal more clearly.Aforesaid way utilizes telepilot and the existing hardware of receiver as far as possible, need not increase such as complicated communication module such as Wi-Fi or blue bud, can not increase the hardware cost of telepilot and receiver.The present invention uses sound as remote signal, because sound does not have directivity, the user need not aim at receiver with telepilot always, and is convenient in the use.The present invention uses a plurality of voice carriers to transmit remote signal, can transmit complicated remote signal rapidly, and can avoid indoor echo to disturb.
Though the present invention discloses as above with preferred embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little modification and perfect, so protection scope of the present invention is when being as the criterion with what claims defined.
Claims (20)
1. telepilot comprises:
One modulator, according to a preset modulation program and different a plurality of carrier modulation one remote signal of frequency of utilization, wherein above-mentioned a plurality of carrier waves produce for cutting apart a predeterminated frequency section; And
One acoustical generator; Couple this modulator; This remote signal after will modulating with form of sound is sent in the air; Airborne this remote signal is received by a receiver, and this receiver basis is preset this remote signal of demodulation process demodulation to presetting one of modulation program, and carries out corresponding remote control actions according to this remote signal after the demodulation.
2. telepilot as claimed in claim 1; It is characterized in that; This modulator is encoded to this remote signal a plurality of significant bits of one first quantity; Utilize an error correcting code that this remote signal is encoded to a plurality of correction bits of one second quantity, and with above-mentioned this remote signal of a plurality of carrier modulation, make each above-mentioned carrier wave carry at least above-mentioned a plurality of significant bit and above-mentioned a plurality of correction bits one of them.
3. telepilot as claimed in claim 1 is characterized in that, this acoustical generator comprises:
One wireless launcher couples this modulator, uses this remote signal after wireless communication protocol emission is modulated; And
One wireless headset uses this wireless communication protocol to receive this remote signal that this wireless launcher is launched, and with form of sound this remote signal is sent in the air.
4. telepilot as claimed in claim 3; It is characterized in that; If in a preset period of time, there is not remote signal to send, then this modulator sees through this wireless launcher and sends a null symbol to this wireless headset, and this preset period of time gets into the stand-by period of holding state less than this wireless headset.
5. telepilot as claimed in claim 1 is characterized in that, this acoustical generator comprises:
One loudspeaker couple this modulator, and this remote signal after will modulating with form of sound is sent in the air.
6. receiver comprises:
One microphone; A remote signal that transmits with form of sound in the admission of air; This remote signal is from a telepilot; This telepilot is according to a preset modulation program and different this remote signal of a plurality of carrier modulation of frequency of utilization, and this remote signal after will modulating with form of sound then is sent in the air, and above-mentioned a plurality of carrier waves produce for cutting apart a predeterminated frequency section; And
One detuner couples this microphone, and according to should presetting preset this remote signal of demodulation process demodulation of modulation program, this receiver this remote signal after according to demodulation is carried out corresponding remote control actions.
7. receiver as claimed in claim 6 is characterized in that, more comprises:
One first wave filter is coupled between this microphone and this detuner, and this remote signal medium frequency of filtering is less than the part of the lower-frequency limit of this predeterminated frequency section.
8. receiver as claimed in claim 7 is characterized in that, this first wave filter also this remote signal medium frequency of filtering greater than the part of the upper frequency limit of this predeterminated frequency section.
9. receiver as claimed in claim 6 is characterized in that, more comprises:
One audio player provides the sound signal of TV programme; And
One loudspeaker couple this audio player, play this sound signal with form of sound.
10. receiver as claimed in claim 9 is characterized in that, more comprises:
One echo canceller; Be coupled between this microphone, this detuner and this audio player; Convolution algorithm is carried out in the echo channel shock response of this sound signal and estimation; The echo signal that obtains estimating deducts this echo signal then from this remote signal, the above-mentioned result who deducts is provided to this detuner and carries out demodulation as offsetting this remote signal after the echo.
11. receiver as claimed in claim 9 is characterized in that, more comprises:
One second wave filter is coupled between this audio player and this loudspeaker, and this sound signal medium frequency of filtering is greater than the part of the lower-frequency limit of this predeterminated frequency section.
12. receiver as claimed in claim 9 is characterized in that, more comprises:
One second wave filter is coupled between this audio player and this loudspeaker, and this sound signal medium frequency of filtering is greater than the lower-frequency limit of this predeterminated frequency section and less than the part of the upper frequency limit of this predeterminated frequency section.
13. a sound remote control thereof comprises:
(a) telepilot is according to a preset modulation program and different a plurality of carrier modulation one remote signal of frequency of utilization, and wherein above-mentioned a plurality of carrier waves produce for cutting apart a predeterminated frequency section;
(b) this remote signal after this telepilot will be modulated with form of sound is sent in the air;
(c) this remote signal that transmits with form of sound in the receiver admission of air;
(d) this receiver is according to presetting this remote signal of demodulation process demodulation to presetting one of modulation program; And
(e) this receiver this remote signal after according to demodulation is carried out corresponding remote control actions.
14. sound remote control thereof as claimed in claim 13 is characterized in that, step (a) comprising:
This remote signal is encoded to a plurality of significant bits of one first quantity;
Utilize an error correcting code this remote signal to be encoded to a plurality of correction bits of one second quantity; And
With above-mentioned this remote signal of a plurality of carrier modulation, make each above-mentioned carrier wave carry at least above-mentioned a plurality of significant bit and above-mentioned a plurality of correction bits one of them.
15. sound remote control thereof as claimed in claim 13 is characterized in that, more comprises in step (c) and (d):
(f) this remote signal medium frequency of this receiver filtering is less than the part of the lower-frequency limit of this predeterminated frequency section.
16. sound remote control thereof as claimed in claim 15 is characterized in that, step (f) more comprises:
This remote signal medium frequency of filtering is greater than the part of the upper frequency limit of this predeterminated frequency section.
17. sound remote control thereof as claimed in claim 13 is characterized in that, more comprises:
This receiver provides the sound signal of TV programme, and plays this sound signal with form of sound.
18. sound remote control thereof as claimed in claim 17 is characterized in that, more comprises in step (c) and (d):
Convolution algorithm is carried out in the echo channel shock response of this sound signal and estimation, the echo signal that obtains estimating;
From this remote signal, deduct this echo signal; And
The above-mentioned result who deducts is provided to step (d) and carries out demodulation as offsetting this remote signal after the echo.
19. sound remote control thereof as claimed in claim 17 is characterized in that, the step of playing this sound signal with form of sound at this receiver more comprises before:
This sound signal medium frequency of filtering is greater than the part of the lower-frequency limit of this predeterminated frequency section.
20. sound remote control thereof as claimed in claim 17 is characterized in that, the step of playing this sound signal with form of sound at this receiver more comprises before:
This sound signal medium frequency of filtering is greater than the lower-frequency limit of this predeterminated frequency section and less than the part of the upper frequency limit of this predeterminated frequency section.
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Cited By (5)
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| CZ304756B6 (en) * | 2013-10-29 | 2014-09-24 | Quatro Partners S.R.O. | General purpose control stand-by device |
| CN104766462A (en) * | 2014-12-29 | 2015-07-08 | 深圳市欧润特科技有限公司 | Sound wave remote control system and sound wave remote control method |
| CN106251608A (en) * | 2015-06-10 | 2016-12-21 | 微秋田科技有限公司 | Mixing type sound wave control system and method thereof |
| CN110320816A (en) * | 2019-08-02 | 2019-10-11 | 珠海格力电器股份有限公司 | Wireless signal processing methods, household appliance control method, household electrical appliance and computer readable storage medium |
| CN112053547A (en) * | 2020-07-24 | 2020-12-08 | 珠海格力电器股份有限公司 | Method for reducing remote control failure rate, remote controller, air conditioner and storage medium |
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| CN110320816A (en) * | 2019-08-02 | 2019-10-11 | 珠海格力电器股份有限公司 | Wireless signal processing methods, household appliance control method, household electrical appliance and computer readable storage medium |
| CN110320816B (en) * | 2019-08-02 | 2020-07-28 | 珠海格力电器股份有限公司 | Wireless signal processing method, household appliance control method, household appliance and computer readable storage medium |
| CN112053547A (en) * | 2020-07-24 | 2020-12-08 | 珠海格力电器股份有限公司 | Method for reducing remote control failure rate, remote controller, air conditioner and storage medium |
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Application publication date: 20120404 |