CN105323012B - Voice data transmission system and sound data transmission method - Google Patents
Voice data transmission system and sound data transmission method Download PDFInfo
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- CN105323012B CN105323012B CN201410333587.8A CN201410333587A CN105323012B CN 105323012 B CN105323012 B CN 105323012B CN 201410333587 A CN201410333587 A CN 201410333587A CN 105323012 B CN105323012 B CN 105323012B
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Abstract
The present invention provides a kind of voice data transmission system, including a channel coder, a data modulator and a loudspeaker.Channel coder generates an encoded signal to receive and encode a bit signal.Data modulator is modulated to the voice signal that frequency is located at a frequency band to received encoded signal, and by encoded signal.Voice signal includes at least four different sub- voice signals, and frequency band includes the sub-band of at least four different frequencies, and the frequency of at least four sub- voice signals is located at least four sub-bands.Loudspeaker to play the voice signal that this includes at least four different sub- voice signals simultaneously.Voice data transmission system and its method of the invention is divided by efficient frequency block and using multi-frequency while the modulation system of transmission, promotes data transfer rate.In addition, the method promotes the safety of data transmission herein in connection with error detection and corrigendum coding mode, to reach the application for carrying out wireless short-distance transmission data using sound.
Description
Technical field
The present invention relates to a kind of voice data transmission system and sound data transmission method more particularly to error detections and frequency
The voice data transmission system and sound data transmission method of rate modulation.
Background technique
As portable electronic devices are increasingly popular, modern has the degree of dependence of data transmission in network telephony higher and higher
Trend.In general, the mode of data transmission in network telephony includes frequency modulation(PFM) (frequency modulation) and phase tune
It makes (phase modulation).Frequency modulation(PFM) is different data to be indicated using the different frequency of sound, and phase-modulation is
Different data is indicated with the out of phase of voice signal.
However, frequency modulation(PFM) and phase-modulation can only all transmit a data, therefore data within a unit time
Transmission speed is not high.In addition, phase-modulation is easy to by multiplexor (multiple channel) and non-synchronous transmissions
It influences, the mistake for causing data to transmit.In view of this, need one be able to ascend data transmission correctness and safety and
It can be improved the voice data transmission system and sound data transmission method of data transmission bauds.
Summary of the invention
In order to overcome defect existing in the prior art, the present invention provides a kind of with scrambled mechanism and frequency tune
The voice data transmission system and its method of system, in the voice signal of at least four frequency range of transmitted per unit time, thus
It can be improved data transmission bauds, and promote the correctness and safety of data transmission.Specifically, provided by the present invention
Voice data transmission system and its method are divided by efficient frequency block and using multi-frequency while the modulation methods of transmission
Formula promotes data transfer rate.In addition, the method promotes the peace of data transmission herein in connection with error detection and corrigendum coding mode
Quan Xing, to reach the application for carrying out wireless short-distance transmission data using sound.
The present invention provides a kind of voice data transmission system, including a channel coder, a data modulator and one raise
Sound device.Channel coder generates an encoded signal to receive and encode a bit signal.Data modulator is compiled to receive
Code signal, and encoded signal is modulated to the voice signal that frequency is located at a frequency band, wherein voice signal includes at least four
Different sub- voice signals, frequency band include the sub-band of at least four different frequencies, and the frequency of at least four sub- voice signals
Rate is located at least four sub-bands.Loudspeaker to play the sound letter including at least four different sub- voice signals simultaneously
Number.
The present invention provides a kind of sound data transmission method, including receives and encode a bit signal, and generate a coding
Signal；Received encoded signal；Encoded signal is modulated to the voice signal that frequency is located at a frequency band, wherein voice signal includes
At least four different sub- voice signals, frequency band include the sub-band of at least four different frequencies, and at least four sub- sound
The frequency of signal is located at least four sub-bands；And the sound including at least four different sub- voice signals is played simultaneously
Signal.
The present invention provides a kind of voice data transmission system, including a radio reception device, a data demodulator and channel solution
Code device.The voice signal that radio reception device is located at a frequency band to receive frequency, wherein voice signal includes at least four different
Sub- voice signal, frequency band includes the sub-band of at least four different frequencies, and the frequency of at least four sub- voice signals is distinguished
Positioned at least four sub-bands.Data demodulator is coupled to radio reception device, will to the frequency according at least four sub- voice signals
Voice signal is demodulated into an encoded signal.Channel decoder generates a bit signal to receive and decode encoded signal.
The present invention provides a kind of sound data transmission method, the voice signal for being located at a frequency band including receiving frequency,
Middle voice signal includes at least four different sub- voice signals, and frequency band includes the sub-band of at least four different frequencies, and
The frequency of at least four sub- voice signals is located at least four sub-bands；The frequency of at least four sub- voice signals of foundation will
Voice signal is demodulated into an encoded signal；And it receives and decodes encoded signal, and generate a bit signal.
The beneficial effects of the present invention are voice data transmission system provided by the present invention and its method pass through effective percentage
Frequency block segmentation and using multi-frequency simultaneously transmit modulation system, promoted data transfer rate.In addition, the method is also tied
Error detection and corrigendum coding mode are closed, the safety of data transmission is promoted, carries out wireless short-distance biography using sound to reach
Send the application of data.
Detailed description of the invention
Figure 1A is the schematic diagram of voice data transmission system provided by the present invention；
Figure 1B is the schematic diagram of channel coder provided by the present invention；
Fig. 1 C is the schematic diagram of data modulator provided by the present invention；
Fig. 1 D is the schematic diagram of data demodulator provided by the present invention；
Fig. 1 E is the schematic diagram of channel decoder provided by the present invention；
Fig. 2 is the schematic diagram of sound data transmission method provided by the present invention；
Fig. 3 A is the flow chart of sound data transmission method provided by the present invention；
Fig. 3 B is the flow chart of another sound data transmission method provided by the present invention.
The reference numerals are as follows:
100~voice data transmission system
200~the first electronic devices
220~data bit element mapper
240~channel coder
242~package processor
244~the first RS encoder
246~CRC encoder
248~the 2nd RS encoder
260~data modulator
262A, 262B~frequency mapper
264~adder
266~starting sound generator
280~loudspeaker
300~second electronic device
320~data bit element converter
340~channel decoder
342~the first RS decoder
344~the 2nd RS decoder
346~CRC decoder
360~data demodulator
362~starting tone Detector
364~time point of contact detector
366~frequency processor
380~radio reception device
AS~voice signal
BS~bit signal
CS~encoded signal
The encoded signal of CS1~first
The encoded signal of CS2~second
F1, F2, F3, F4~sub-band
X1, X2, X3, X4~separation band
T1, T2, T3~period
Specific embodiment
The device and application method of various embodiments of the invention discussed more fully below.It is important to note, however, that this hair
Many feasible concept of the invention provided by bright may be implemented in various particular ranges.These specific embodiments are only used for illustrating
The device and application method of the bright disclosure, but it is non-for limiting the scope of the invention.
Figure 1A is the schematic diagram of voice data transmission system 100 provided by the present invention.In one embodiment, voice data
Transmission system 100 includes the first electronic device 200 and second electronic device 300.For example, the first electronic device 200 is
The transmission end of voice data transmission system 100, second electronic device 300 are the receiving end of voice data transmission system 100.First
Electronic device 200 includes data bit element mapper 220, channel coder 240, data modulator 260 and loudspeaker 280.The
Two electronic devices 300 include data bit element converter 320, channel decoder 340, data demodulator 360 and radio reception device 380.
For example, the first electronic device 200 can be tablet computer, smartphone, network service with second electronic device 300
Device, desktop computer, notebook computer and/or it is any provide any wireless network services electronic device, do not limited herein
System.In addition, in one embodiment, loudspeaker 280 is loudspeaker, and radio reception device 380 is microphone.In another embodiment, first
Electronic device 200 and second electronic device 300 are incorporated into the same electronic device, the receiving end as another electronic device
And/or transmission end.
Specifically, data bit element mapper 220 is to map (mapping) for an original data signal or be converted to position
First signal BS.Then, channel coder 240 receives bit signal BS, and is encoded and generate encoded signal CS.Figure 1B is this
The schematic diagram of channel coder 240 provided by inventing.As shown in Figure 1B, channel coder 240 include package processor 242,
First reed solomon code (RS) encoder 244, cyclic redundancy check (CRC) encoder 246 and the second reed solomon code
Encoder 248.The original data signal that package processor 242 is included to handle or analyze bit signal BS, to be closed
In the packet information signal of the original data signal, such as transmission type, data type, size of data and whether be completely to seal
Packet.For example, the size of above-mentioned packet information signal is 12 bits (bit), wherein 2 bits are broadcasted to indicate
(broadcast) or confirm transmission types, 3 bits such as (acknowledge) to indicate medium access control address (mac
) etc. address data types, 6 bits to indicate original data signal size of data, 1 bit is to indicate whether being complete
Whole package.
As shown in Figure 1B, in one embodiment, bit signal is conveyed directly to the first RS encoder 244, and then channel is compiled
Code device 240 generates the first encoded signal CS1 using the first RS encoder 244.In addition, package processor 242 is by packet information
Signal is sent to CRC encoder 246, and the second coding letter is generated by CRC encoder 246 and the 2nd RS encoder 248
Number CS2.In other words, the encoded signal CS that channel coder 240 is exported includes the first coding letter for representing original data signal
Number CS1, and the second encoded signal CS2 of the packet type to indicate original data signal.It follows that channel coder
240 execute the error detection (Error Detection) and error correction (Error Correction) of bit or symbol, and drop
Noise jamming in low pass road is to influence caused by voice data transmission system 100.
For example, CRC encoder 246 is the coding of CRC-6, and the 2nd RS encoder 248 is RS (7,5,2) shortening
To the coding of (6,4,2) RS.Therefore, the size of packet information signal is 12 bits, and CRC encoder 246 and the 2nd RS are compiled
Code device 248 is further added by the coding of 6 bits respectively, and generates the second encoded signal CS2 of 24 bits.In addition, the first RS encoder
244 foreshorten to the coding of (24,12,12) RS for RS (64,51,12).When original data signal is 9 bit group (byte), the
The first encoded signal CS1 that one RS encoder 244 is exported is 18 bit groups.It follows that due to voice data of the invention
Transmission system has used RS coding and CRC coding, thus improves the accuracy rate of data transmission, coding/decoding.In addition, by
Contain the important information of initial data in the second encoded signal CS2, thus using two layers of error detection and the mechanism of corrigendum (
That is RS coding and CRC coding), strictly prevent the loss and mistake of data.Use the mechanism energy of two layers of error detection and corrigendum
The correctness of data transmission is enough significantly increased, and prevents the initial data connected to be stolen and takes (because initial data must utilize
The information of second encoded signal CS2, could completely demodulate), thus promote the safety of data transmission.It is worth noting that, this
In the embodiment of invention, each functional element (such as the first RS encoder 244 or CRC encoder 246 etc.) can by hardware and/
Or software is formed, and the circuits such as chip, controller, storage device and/or procedure code, application program etc. are contained.In addition, above-mentioned
Bit number is only purposes of discussion, rather than to limit technology scope of the invention.
Fig. 1 C is the schematic diagram of data modulator 260 provided by the present invention.Data modulator 260 includes frequency mapper
262A and 262B, adder 264 and starting sound generator 266.In one embodiment, data modulator 260 receives coding letter
Number CS (including first encoded signal CS1 and the second encoded signal CS2), and encoded signal CS is modulated to frequency positioned at a frequency
The voice signal AS of band.For example, above-mentioned frequency band is about between 18000 hertz and 20000 hertz.This frequency range is
Loudspeaker 280 can play, but the frequency range that general human ear can not recognize, so acoustically dry will not be caused to user
It disturbs.It is worth noting that, voice signal AS includes at least four different sub- voice signals, frequency band includes at least four different frequencies
The sub-band of rate, and the frequency of at least four sub- voice signal is located at least four sub-band.Then, data tune
Voice signal AS is sent to loudspeaker 280 by device 260 processed, and it includes at least four different sub- sound that loudspeaker 280 plays simultaneously
The voice signal AS of sound signal.In another embodiment, loudspeaker 280 first plays four about the second encoded signal CS2 simultaneously
Then a sub- voice signal plays four sub- voice signals about the first encoded signal CS1 simultaneously again.
Specifically, as shown in Figure 1 C, frequency mapper 262A and 262B receive the second encoded signal CS2 and the respectively
One encoded signal CS1, and frequency mapping is carried out to be modulated, it is then orderly sent to adder 264 and starting sound produces
Raw device 266.Starting sound generator 266 includes a voice signal AS for originating voice signal to generate.Specifically, starting sound
The frequency of sound signal is located at the first separation band, and the first separation band is different from four frequencies of four sub- voice signals
Band.It will be detailed below the modulator approach of frequency mapping.
The modulation numerical value of one frequency of table mapping
In one embodiment, frequency mapper 262A and 262B respectively believes the coding of the second encoded signal CS2 and first
Number CS1 carries out frequency mapping.As shown in Table 1, frequency mapper 262A and 262B compiles the second encoded signal CS2 and first
Code signal CS1 mapping is modulated to the frequency band between 18000 hertz and 20000 hertz.Above-mentioned frequency band includes four sub-bands
F1, F2, F3, F4 and four separation bands X1, X2, X3, X4.Each sub-band F1, F2, F3 or F4 respectively include eight frequencies
To represent three-figure bit value (namely three bits), and between each frequency, an interval is about 40 hertz to 50 to rate
Hertz.For example, sub-band F1 includes eight frequencies such as 18000 hertz, 18046 hertz, 18093 hertz, wherein 18000 hertz
Hereby represent 000 bit value, 18046 hertz represent 001 bit value, 18093 hertz represent 010 bit value.It is worth noting
, four separation bands X1, X2, X3, X4 are as buffering, clearly to define the frequency model of each sub-band F1, F2, F3, F4
It encloses, reduces the error rate of signal transmission.It follows that aforementioned four sub-band F1, F2, F3, F4 and four separation bands
X1, X2, X3, X4 are staggered, so that four sub-bands F1, F2, F3, F4 will not be adjacent to each other.
Specifically, due to three bits of each frequency representative in four sub-bands F1, F2, F3, F4.Therefore at one
In unit time, four sub-bands F1, F2, F3, F4 can generate the data of 12 bits simultaneously.It compares in a unit time
The data of a frequency can only be transmitted, sound data transmission method provided by the present invention can transmit within a unit time
The data of four frequencies, therefore data transmission bauds with higher.In one embodiment, the frequency of start sound signal is located at
One of four separation bands X1, X2, X3, X4.In another embodiment, data modulator 260 also generates a control sound
Sound signal as multiple access (Multiple Access) and prevents sound from colliding.The sound that data modulator 260 is exported
Sound signal AS also includes control voice signal, wherein the frequency of control voice signal is located at four separation bands X1, X2, X3, X4
One of.It is worth noting that, start sound signal and control voice signal are located at different separation bands.Citing and
Speech, control voice signal be located at the highest separation band X4 of frequency, wherein the three of separation band X4 highest frequency (namely
19875 hertz, 19921 hertz and 19968 hertz) it is used as control voice signal.
Fig. 1 D is the schematic diagram of data demodulator 360 provided by the present invention.Data demodulator 360 includes starting sound detection
Device 362, time point of contact detector 364 and frequency processor 366.In one embodiment, data demodulator 360 is received from receipts
The voice signal AS of sound device 380, and the frequency according to the voice signal AS at least four sub- voice signals for being included, by sound
Signal AS is demodulated into encoded signal CS.Specifically, starting tone Detector 362 is to detect the starting among voice signal AS
Voice signal.Time point of contact (preamble) of the time point of contact detector 364 to detect voice signal AS, it is special with judgement transmission
Determine the unit time of the bit value of frequency.Once time point of contact detector 364 detects time point of contact, frequency processor 366 is just
Can analyze or determine the specific frequency among each sub-band F1, F2, F3, F4, and demodulate the first encoded signal CS1 with
And the second encoded signal CS2.
Fig. 1 E is the schematic diagram of channel decoder 340 provided by the present invention.In one embodiment, channel decoder 340
The encoded signal CS that simultaneously decoding data demodulator 360 is exported is received, and generates bit signal BS.Channel decoder 340 includes
First RS decoder 342, the 2nd RS decoder 344 and CRC decoder 346.First RS decoder 342 is to decode the first volume
Code signal CS1, and the 2nd RS decoder 344 and CRC decoder 346 be to decode the second encoded signal CS2, and finally generate
Bit signal BS.For example, CRC decoder 346 is the decoding of CRC-6, and the 2nd RS decoder 344 is RS (7,5,2)
Foreshorten to the decoding of (6,4,2) RS.Therefore, as shown in Figure 1, the second encoded signal CS2 of 24 bits passes through the 2nd RS decoder
After the decoding of 344 and CRC decoder 346, become the packet information signal of 12 bits.In addition, the first RS decoder 342 is RS
(64,51,12) decoding of (24,12,12) RS is foreshortened to.First encoded signal CS1 is after the decoding of the first RS decoder 342
Original data signal as 9 bit groups.It follows that due to voice data transmission system of the invention used RS coding with
And CRC coding, thus improve the accuracy rate of data transmission, coding/decoding.
Fig. 2 is the schematic diagram of sound data transmission method provided by the present invention.In one embodiment, loudspeaker 280 is first
First start sound signal is played or transmitted in period T1.For example, the frequency of start sound signal is located at separation band X1, and
And period T1 contains four unit time.Then, loudspeaker 280 plays four about the second encoded signal CS2 in period T2
A sub- voice signal, the frequency of aforementioned four sub- voice signal are located at four sub-bands such as F1, F2, F3, F4.For example, one
3 bits of frequency representative among a sub-band, therefore can play 12 bits in a unit time.Due to the second encoded signal
CS2 is 24 bits, therefore is played out in period T2 including two unit time.Then, loudspeaker 280 is broadcast in period T3
Four sub- voice signals about the first encoded signal CS1 are put, the frequency of aforementioned four sub- voice signal is located at F1, F2, F3, F4
Deng four sub-bands.The time span of period T3 is depending on the initial data that the first encoded signal CS1 is included.
In one embodiment, loudspeaker 280 also plays one in four sub- voice signals for playing the first encoded signal CS1
Terminate voice signal to be transmitted with representative voice data.Terminate voice signal frequency be located at four separation band X1, X2,
One of X3, X4.In another embodiment, sound data transmission method of the invention select separation band X1, X2, X3,
Symptom (Symptom) of two frequencies as voice signal AS in X4, including start sound signal and end voice signal.
Increasing start sound signal and terminating the symptoms such as voice signal is the trigger point in order to allow receiving end that can find acoustic processing
(namely time point of contact).
It is worth noting that, loudspeaker 280 can play control voice signal (citing in each period T1, T2 and T3
For, the frequency for controlling voice signal is located at separation band X4), so that other electronic devices is being capable of detecting when own electronic device just
Voice signal AS is being played, is being simultaneously emitted by voice signal to avoid more than two electronic devices, and is causing data transmission in network telephony
Collision and erroneous judgement.It follows that voice data transmission system 100 provided by the present invention and its method pass through it is efficient
Modulation system frequency block segmentation and transmitted simultaneously using multi-frequency promotes data transfer rate.In addition, the method herein in connection with
Error detection and corrigendum coding mode please reduce number using the concept of self-defining package to promote the correctness of data transmission
A possibility that according to stealing, promotes the safety of data transmission.In summary function realization, can be different to reach user
Between electronic device, the application of wireless short-distance transmission data is carried out using sound.
Fig. 3 A is the flow chart of sound data transmission method provided by the present invention.Firstly, in step s 302, it will be original
Data-signal carries out data mapping to generate bit signal BS, then respectively enters step S304 and step S306.In step
In S304, encoded using the first RS to generate the first encoded signal CS1 comprising original data signal.In step S306, make
The second encoded signal CS2 of the packet type for indicating original data signal is generated with CRC coding and the 2nd RS coding.Then
S308 is entered step, the first encoded signal CS1 and the second encoded signal CS2 are modulated to the voice signal that frequency is located at a frequency band
AS.Voice signal AS includes at least four different sub- voice signals, frequency band include at least four different frequencies sub-band F1,
F2, F3, F4, and the frequency of at least four sub- voice signals is located at least four sub-band F1, F2, F3 and F4.It carries out
Modulation and frequency mapping are to generate the method detailed of voice signal AS as previously mentioned, therefore details are not described herein again.Then, in step
In S310, the start sound signal for being contained in voice signal AS is generated.Step S312 is finally entered, voice signal AS is played.Value
It obtains it is noted that in one embodiment, also generating a control voice signal, and control voice signal and be located at different from least four
A separation band of a sub-band F1, F2, F3 and F4.In another embodiment, start sound signal and control are first played simultaneously
Voice signal processed, then voice signal and control voice signal including at least four different sub- voice signals are played simultaneously.
Fig. 3 B is the flow chart of another sound data transmission method provided by the present invention.First in step S360,
Receive frequency and be located at a voice signal AS of a frequency band, wherein voice signal AS include start sound signal and at least four not
With sub- voice signal, frequency band includes sub-band F1, F2, F3, F4 of at least four different frequencies, and at least four sub- sound
The frequency of signal is located at least four sub-band F1, F2, F3, F4.Subsequently into step S362, if detect starting sound
Sound signal.If detecting start sound signal, S364 is entered step.If not detecting start sound signal, return
To step S360.In step S364, if detect the time point of contact about package aspect.If do not detected about envelope
The time point of contact of packet aspect, then return to step S360.If detecting the time point of contact about package aspect, enter step
S366 and S369.In step S366, the first encoded signal CS1 is demodulated, subsequently into step S368, is sentenced using the first RS coding
Whether disconnected first encoded signal CS1 is correctly decoded.If judging that the first encoded signal CS1 is not solved correctly using the first RS coding
Code, then return to step S360.If judging that the first encoded signal CS1 is correctly decoded using the first RS coding, enter step
S372。
In addition, demodulating the second encoded signal CS2 in step S369.Subsequently into step S370, using CRC encode with
And the 2nd RS coding judge whether the second encoded signal CS2 is correctly decoded.If using CRC coding and the 2nd RS coding judgement
Second encoded signal CS2 is simultaneously incorrectly decoded, then returns to step S360.If using CRC coding and the 2nd RS coding judgement
Second encoded signal CS2 is correctly decoded, then enters step S372.In step S372, the first encoded signal CS1 and second is compiled
Code signal CS2 carries out data conversion to generate bit signal BS.Subsequently into step S374, if stop receiving voice signal
AS.If not stopping receiving voice signal AS, step S360 is returned to.If stopping receiving voice signal AS, enter step
Rapid S376 terminates the process of sound data transmission method.It is worth noting that, being to pass in one embodiment, representated by Fig. 3 A
The sound data transmission method of sending end (such as first electronic device 200) is receiving end (such as the second electronics representated by Fig. 3 B
Device 300) sound data transmission method.
In conclusion the preferred embodiment of the only disclosure, should not limit the range of disclosure implementation, i.e., with this
All simple equivalent changes and modifications according to made by disclosure scope of the claims and invention description content, still belong to this public affairs
It opens in the range of patent covers.In addition, any embodiment or scope of the claims of the disclosure need not reach disclosed in the disclosure
Whole purposes or advantage or feature.It is used in addition, abstract part and title are intended merely to auxiliary patent document search, not uses
To limit the interest field of the disclosure.
Claims (14)
1. a kind of voice data transmission system, comprising:
One channel coder to receive and encode a bit signal, and generates an encoded signal；
One data modulator is modulated to the sound that frequency is located at a frequency band to receive the encoded signal, and by the encoded signal
Sound signal, wherein the voice signal includes at least four different sub- voice signals, which includes at least four different frequencies
Sub-band, and the frequency of at least four sub- voice signal is located at least four sub-band；And
One loudspeaker includes the voice signal of at least four different sub- voice signals to broadcasting simultaneously, wherein the sound
Signal includes a starting voice signal, and the frequency of the start sound signal is located at one first separation band, and first interval
Frequency band is different from least four subband.
2. voice data transmission system as described in claim 1, wherein the encoded signal includes the one of an original data signal
First encoded signal, and one second encoded signal of the packet type to indicate the original data signal.
3. voice data transmission system as claimed in claim 2, wherein the channel coder uses one first Read-solomon
Code RS encodes to generate first encoded signal, and uses cyclic redundancy check (CRC) coding and one second Read-solomon
Code coding is to generate second encoded signal.
4. voice data transmission system as claimed in claim 2, wherein the loudspeaker is first played simultaneously about second coding
Then four sub- voice signals of signal play four sub- voice signals about first encoded signal simultaneously again.
5. voice data transmission system as described in claim 1, wherein the frequency of the frequency band is at 18000 hertz and 20000
Between hertz.
6. voice data transmission system as described in claim 1, wherein the voice signal includes to prevent sound from colliding
One control voice signal, the frequency of the control voice signal is located at one second separation band, and second separation band is different
In at least four subband and first separation band.
7. voice data transmission system as claimed in claim 6, wherein the loudspeaker first plays the start sound signal simultaneously
And the control voice signal, then the control voice signal and at least four different sub- voice signals are played simultaneously.
8. a kind of sound data transmission method, comprising:
It receives and encodes a bit signal, and generate an encoded signal；
Receive the encoded signal；
The encoded signal is modulated to the voice signal that frequency is located at a frequency band, wherein the voice signal does not include at least four not
Same sub- voice signal, which includes the sub-band of at least four different frequencies, and at least four sub- voice signal
Frequency is located at least four sub-band；And
The voice signal including at least four different sub- voice signals is played simultaneously, and wherein the voice signal includes a starting
Voice signal, the frequency of the start sound signal is located at one first separation band, and first separation band is different from this extremely
Few four subbands.
9. sound data transmission method as claimed in claim 8, wherein in the step of generating the encoded signal, coding letter
Number include an original data signal one first encoded signal, and the packet type to indicate the original data signal one
Second encoded signal.
10. sound data transmission method as claimed in claim 9, wherein the step of generating the encoded signal uses in one first
Moral solomon code RS encodes to generate first encoded signal, and using in cyclic redundancy check (CRC) coding and one second
Moral solomon code encodes to generate second encoded signal.
11. sound data transmission method as claimed in claim 9, wherein playing at the same time includes at least four different sub- sound
In the step of voice signal of signal, while four sub- voice signals about second encoded signal are played, it is then same again
When play four sub- voice signals about first encoded signal.
12. sound data transmission method as claimed in claim 8, the frequency of midband is at 18000 hertz and 20000 hertz
Between hereby.
13. sound data transmission method as claimed in claim 8, wherein the voice signal includes to prevent sound from colliding
One control voice signal, the frequency of the control voice signal is located at one second separation band, and second separation band is different
In at least four subband and first separation band.
14. sound data transmission method as claimed in claim 13, wherein the start sound signal and the control sound are believed
Number elder generation plays simultaneously, and at least four different sub- voice signals and the control voice signal play simultaneously again.
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| CN110049427B (en) * | 2019-05-16 | 2023-06-23 | 上海纽菲斯信息科技有限公司 | Method for realizing simultaneous detection of multiple earphones |
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