CN1365222A - Audio frequency directly dialing method and device for double tone multiple frequency telephone set - Google Patents
Audio frequency directly dialing method and device for double tone multiple frequency telephone set Download PDFInfo
- Publication number
- CN1365222A CN1365222A CN 02104007 CN02104007A CN1365222A CN 1365222 A CN1365222 A CN 1365222A CN 02104007 CN02104007 CN 02104007 CN 02104007 A CN02104007 A CN 02104007A CN 1365222 A CN1365222 A CN 1365222A
- Authority
- CN
- China
- Prior art keywords
- dtmf
- audio frequency
- dial
- signal
- telephone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The present invention relates to one direct audio dialing method and device for double tone multiple frequency telephone set. Mobile, palm computer or personal digital assistant is used as the dialing device, and the direct dialing method includes setting double tone multiple frequency dialing function option correlating telephone number sequence in the dialing device; generating double tone multiple frequency signals ocrresponding to each selected telephone number in double tone multiple frequency signal generator after activating the option; and outputting through the loudspeaker the double tone multiple frequency signals corresponding to the telephone numbers. The double tone multiple frequency dialing sequence may be generated in various hardware or software modes.
Description
Technical field
The present invention relates to communication technical field, relate to a kind of method that Dual Tone Multifrequency dialing tone sequence directly dials to fixing Dual Tone Multifrequency telephone set and device that produces this Dual Tone Multifrequency dialing tone sequence of utilizing or rather.
Background technology
As everyone knows, need to make a phone call dialing earlier.A fixing Dual Tone Multifrequency telephone set, after dialing, by the telephone set internal circuit according to dial the number, produce the Dual Tone Multifrequency signal corresponding with number, pass to stored-program control exchange by circuit, after decoding, carry out calling and called both sides' talking connection.The combination of frequency of the double-audio signal of GB GB3378-82 regulation and as shown in the table with the relation of number:
| High frequency group | ??H1 | ???H2 | ???H3 | ???H4 | |
| Low frequency group | ?1209 | ??1336 | ??1477 | ??1633 | |
| ????L1 | ????697 | ??1 | ????2 | ????3 | ????A |
| ????L2 | ????770 | ??4 | ????5 | ????6 | ????B |
| ????L3 | ????852 | ??7 | ????8 | ????9 | ????C |
| ????L4 | ????941 | ??* | ????0 | ????# | ????D |
For the DTMF telephone set, because in fact dialing tone and user's call voice is propagated by same telephone line, therefore, audio frequency directly sends the receiver of telephone set (or microphone) to if will dial, just can realize dialing, and needn't transfer to the called phone number one by one in proper order at DTMF phone hands-operation button with indirect mode.
At present, portable terminal (as mobile phone, car phone machine etc.) and PDA (Personal Digital Assistant) (PDA) and palmtop PC etc., had very powerful and abundant intelligent function, as the telephone directory function of one of them, the user just can find needed telephone number (perhaps other information) like a cork by the record that inquiry is stored among mobile phone or palmtop PC or the PDA, can replace the telephone directory of hand-written record to a certain extent.
Yet, because the difference between mobile phone and landline telephone post and telecommunication tariff, and the mobile phone electromagnetic wave width of cloth is penetrated the problem that is detrimental to health, people still can use fixed telephone to make a phone call as far as possible, be that the user finds desired telephone number from mobile phone (or PDA (Personal Digital Assistant) or palmtop PC) earlier, dial on fixed telephone according to shown number again, needing to knock telephone keypad by hand carries out, efficient is low, error rate is high, the more important thing is not allow mobile phone (or PDA (Personal Digital Assistant) or palmtop PC) make the best use of everything.
Summary of the invention
The objective of the invention is to design a kind of audio frequency dial-in direct method and device of double tone multiple frequency telephone set, make full use of the thin function of phone number of mobile phone or palmtop PC or PDA, fixing double tone multiple frequency telephone set is carried out the audio frequency dial-in direct, both make things convenient for the user, widened the application of mobile phone or palmtop PC or PDA again.
The technical scheme that realizes the object of the invention is such: a kind of audio frequency dial-in direct method of double tone multiple frequency telephone set is characterized in that comprising following treatment step:
A. the telephone number sequence of storing in the audio frequency dial-in direct device number book is generated DTMF pulsing sound sequence;
B. the receiver by the dual-tone multifrequency fixed telephone directly receives this DTMF pulsing sound sequence, carries out DTMF pulsing.
Described steps A further comprises:
A1., the DTMF pulsing function choosing-item that is associated with telephone number sequence in the audio frequency dial-in direct device is set in audio frequency dial-in direct device software;
A2. after the DTMF pulsing function choosing-item is activated, be the touch-tone signal of each number generation correspondence in the telephone number sequence of choosing by the touch-tone signal maker;
A3. touch-tone signal corresponding with each number in the telephone number sequence is chosen by the loud speaker output of audio frequency dial-in direct device in the compartment of terrain.
Being associated among the described step a1, be with audio frequency dial-in direct device telephone directory book in name or the menu option that is associated of telephone number sequence in the DTMF pulsing function choosing-item is set, the telephone number sequence of storing in this function choosing-item and the audio frequency dial-in direct device telephone directory book is associated, after the user chooses the dtmf dialing function choosing-item that is stored in a telephone number sequence in the audio frequency dial-in direct device telephone directory book, initiatively call Dual Tone Multifrequency dialing background task program by man-machine interface (MMI) foreground program, realize the Dual Tone Multifrequency dialing.
Among the described step a2, the method that the touch-tone signal maker generates touch-tone signal is:
A21. will with each dial key content corresponding audio as constituent instruments, be stored in the memory bank of audio frequency dial-in direct device;
A22. from memory bank, access corresponding constituent instruments by the telephone number sequence order, play at interval.
Among the described step a2, the method that the touch-tone signal maker generates touch-tone signal is:
Each single-frequency that a23. will make up touch-tone signal is stored in the memory bank of audio frequency dial-in direct device as constituent instruments;
A24. from memory bank, once access corresponding two constituent instruments by the telephone number sequence order, make up the back and play at interval.
Among the described step a2, described touch-tone signal maker generates the method for touch-tone signal, be sine or the cosine function that utilizes two the single-frequency frequency values corresponding with each telephone number, constantly discrete at n, calculate each amplitude of respective signal constantly respectively, n amplitude formed and the corresponding touch-tone signal data of telephone number, and n is a positive integer;
Press the telephone number sequence order output data corresponding, produce DTMF pulsing sound sequence with each number.
Among the described step a3, comprise also that simultaneously the output volume with audio frequency dial-in direct device is adjusted to maximum.
The technical scheme that realizes the object of the invention still is such: a kind of audio frequency dial-in direct device of double tone multiple frequency telephone set, it is characterized in that: described dialing mechanism is mobile phone or palmtop PC or the PDA (Personal Digital Assistant) that is provided with the DTMF pulsing function, comprise dual tone multi-frequency signal generator and the amplifier that is attached thereto, the control end of dtmf generator is connected with the control circuit of mobile phone or palmtop PC or PDA (Personal Digital Assistant), and amplifier out is connected with the loud speaker of mobile phone or palmtop PC or PDA (Personal Digital Assistant).
Described dtmf generator is an integrated circuit modules that can produce each touch-tone signal successively.
Described dtmf generator is an integrated circuit modules that can once produce the dual-tone multifrequency sequence signal.
The present invention allows mobile phone or palmtop PC or PDA (Personal Digital Assistant) produce dtmf dialing sound sequence by soft, hardware mode, and they can directly be dialled to the DTMF telephone set.The audio frequency signal output of dtmf signal generation method of the present invention, mobile phone or palmtop PC or PDA (Personal Digital Assistant), and to the automatic dial method of DTMF fixed telephone, can be widely used in wireless and the telephone communication in.
Advantage of the present invention is: increasing hardly under the condition of cost, by being the additional new function of mobile phone or palmtop PC or PDA (Personal Digital Assistant), realizing the audio frequency dial-in direct of double tone multiple frequency telephone set.Although mobile phone itself is exactly the conversation instrument, under mobile phone and the simultaneous situation of fixed telephone,, guarantee speech quality for saving the conversation cost, the user selects fixed telephone to be better than selecting mobile phone.The present invention directly utilizes the telephone number of depositing in the mobile phone (or palmtop PC or PDA (Personal Digital Assistant)) (with powerful memory, intelligent management function) to the landline telephone dialing, meets user's this demand just, for the user brings convenience.In addition, when mobile phone is shut down because of temporary transient arrearage, also can utilize its touch-tone signal function directly the dual-tone multifrequency fixed telephone to be dialled.
Description of drawings
Fig. 1 is an audio frequency dial-in direct method schematic diagram of the present invention;
Fig. 2 a is the software interface schematic diagram on middle MMI foreground of mobile phone (or palmtop PC or PDA) and dtmf dialing backstage;
Fig. 2 b is a MMI foreground process flow block diagram;
Fig. 3 is first method implementing procedure, the schematic diagram with mobile phone (or palmtop PC or PDA) software generation voice-frequency dialing sound of the present invention, comprises Fig. 3 a, Fig. 3 b and Fig. 3 c;
Fig. 4 is the second method implementing procedure block diagram that produces the voice-frequency dialing sound with mobile phone (or palmtop PC or PDA) software of the present invention;
Fig. 5 a is the digital dtmf signal sequence schematic diagram when generating number sequence " 1122 " by the inventive method, and Fig. 5 b, 5c and 5d illustrate the location track schematic diagram of the DTMF pulsing signal when utilizing computational methods to generate number " 1 " among Fig. 5 a respectively;
Fig. 6 is the third method implementing procedure block diagram that produces the voice-frequency dialing sound with mobile phone (or palmtop PC or PDA) software of the present invention;
Fig. 7 is the principle structure block diagram of audio frequency dial-in direct device-mobile phone of the present invention (or palmtop PC or PDA);
Fig. 8 is the implementing procedure block diagram that produces the voice-frequency dialing sound with mobile phone (or palmtop PC or PDA) hardware of the present invention.
Embodiment
Referring to Fig. 1, method of the present invention is to utilize mobile phone (or palmtop PC or PDA) to produce dtmf dialing sound sequence, as shown in FIG. 87654321, to the method for DTMF telephone set (aiming at receiver or microphone) dial-in direct.
As shown in FIG., when the user uses mobile phone, after choosing desired telephone number sequence, mobile phone speaker is aimed at the microphone of DTMF telephone set, the user presses the button that mobile phone is set, the dtmf dialing function that Activates Phone produces the dialing tone sequence, and the dialing tone sequence enters the direct voice-frequency dialing that microphone is realized telephone set.
Comprise the following steps: in cell phone software, to be provided with the dtmf dialing function choosing-item, the telephone number sequence of storing in this option and the cell-phone telephone number book is associated, when the user chooses the dtmf dialing function choosing-item in modes such as buttons, activate the dtmf dialing function, it is that each number in the telephone number sequence of choosing generates dtmf signal that mobile phone utilizes software approach, a plurality of dtmf signals are exported at interval by mobile phone speaker and are formed dtmf dialing sound sequence, when mobile phone speaker is aimed at the receiver (microphone) of DTMF telephone set, the dialing tone sequence enters the DTMF telephone set, realizes dial-in direct.Consider from helping dialing, should improve signal to noise ratio, so can when dialing, automatically the mobile phone speaker output volume be transferred to maximum by cell phone system.
The present invention produces dtmf dialing sound sequence and makes the dialing of DTMF telephone set, and mobile phone (or palmtop PC or PDA) can produce dtmf signal by software or hardware mode.
First kind of software mode is storage dtmf signal file in mobile phone (or palmtop PC or PDA) memory body, produces the dtmf dialing sound by calling the dtmf signal file.
Storage can be used to form a plurality of constituent instruments of any dtmf dialing sound sequence in mobile phone (or palmtop PC or PDA) memory body, and the quantity of file is generally 12, respectively corresponding " 0 ", " 1 " ... " 8 ", " 9 ", " * ", and " # " dtmf signal of totally 12 button titles.
As by 4 frequencies of DTMF standard high frequency group of listing in the table 1,4 frequencies of low frequency group, " 0 "～" 9 " that the DTMF dual tone phone machine that is combined into is required, " * ", " # ", and " A ", " B ", " C ", " D " be totally 16 audio frequency that button is required.Pairing 4 keys of high frequency group H4 " A " wherein, " B ", " C ", " D " is that special purpose is required, only consider " 0 "～" 9 ", " * ", " # " totally 12 keys when considering mobile phone (or palmtop PC or PDA) storing phone number, and the general user do not need " A ", " B ", therefore " C ", " D " key can only be preserved the constituent instruments of 12 dtmf signals.
The duration of the dtmf signal constituent instruments of each storage according to GB GB3378-82, should be at least 30ms, but in order to increase the reliability of dialing, should increase the duration of signal, for example can adopt 100ms.The duration that can make the dtmf signal constituent instruments of each storage during enforcement is 100ms, also can utilize software, by repeatedly playing the increase that realizes the signal duration, for example, allow the duration of individual signals constituent instruments be 50ms, play the signal output that just can realize a 100ms duration for twice continuously.
The signal amplitude of each dialing tone constituent instruments of being stored should be set to be the bigger the better, and can be set to maximum, to help improving the signal to noise ratio of output signal.
Second kind of software mode is storage simple signal constituent instruments in mobile phone (or palmtop PC or PDA) memory body, be a plurality of constituent instruments that can be used to be combined into the single audio signal of any dialing tone sequence, by calling two simple signal constituent instruments and carrying out the dtmf signal that additive combination produces a telephone number.
The constituent instruments quantity of this moment has 7 at least, is the single audio signal file that is used to produce any one dialing tone sequence, corresponds respectively to DTMF high frequency group frequency 1209Hz, 1336Hz and 1477Hz, and low frequency group frequency 697Hz, 770Hz, 852Hz and 941Hz, totally 7 frequencies.Each single audio signal file storage is a single audio signal.Like this, 7 single audio frequency files just can satisfy generation " 0 "～" 9 ", " * ", " # " dtmf signal of any title in totally 12 button titles.
The duration of each single audio signal constituent instruments also should be at least 30ms by standard code, but in order to increase the reliability of dialing, can increase the duration of signal, for example can adopt 100ms, also can increase the signal duration by the method for continuous broadcast.
The amplitude of each dialing tone file institute storage signal can be set to half of high-amplitude, like this, can guarantee that corresponding sampled point numerical value that two single audio frequency files are stored is undistorted when direct addition, forms a sampled point numerical value of double-audio signal.Can certainly be set to other amplitudes, during the corresponding sampled value addition of two single audio frequency files at this moment, the amplitude convergent-divergent in the time of considering addition is in order to avoid distorted signals.
The third software mode is a computing function of utilizing mobile phone (or palmtop PC or PDA), produces dtmf signal by calculating, and computing formula is as follows:
Wherein n is the current location of expression discrete-time series, f
1And f
2Be respectively to generate the pairing two kinds of frequency values of telephone number, f
nBe the signals sampling frequency, A
1And A
2Be signal amplitude or gain coefficient, generally can allow A
1=A
2, φ 1 and φ 2 are respectively phase pushing figures, default value can be zero.
Data flow V
nConstantly output produces dtmf signal.The dtmf signal of number " 6 " for example, sample frequency f
n=8000Hz generates signal and comprises two frequency f
1=770Hz, f
2=1477Hz.
Any sin function in the formula 1 can replace to the cos function, does not constitute because this does not influence output signal frequency.
Referring to Fig. 2, Fig. 2 a is the software interface schematic diagram on MMI (man-machine interface) foreground and dtmf dialing backstage, and Fig. 2 b is a MMI foreground process chart.
The present invention utilizes mobile phone (or PDA or palmtop PC) to generate the method for dtmf signal, is achieved through the following technical solutions, and with the mobile phone example, flow process shown in Fig. 2 a:
Send call request by MMI (man-machine interface) foreground program to dtmf dialing background task program, the MMI foreground program be responsible between process user and mobile phone man-machine interaction and after knowing that the user selects, call backstage DTMF function;
After dtmf dialing background task program is received request, read the telephone number sequence that the user chooses, adjust mobile phone volume to maximum, utilize the method that software is synthetic or hardware generates to produce dtmf dialing sound sequence, dtmf dialing sound sequence is exported by mobile phone speaker.
After the task of generation dtmf dialing sound sequence is finished, dtmf dialing background task program notice foreground program " dialing finishes to confirm ", the MMI foreground program receives after backstage dtmf dialing program task finishes signal, show " redialing " or " withdrawing from " option to the user, or change other states over to, do new operation as the prompting user.Select the user can call the dtmf dialing function once more under the situation of " redialing ".
Process from MMI (man-machine interface) foreground program to dtmf dialing background task program that sent call request by further is shown among Fig. 2 b.With cell-phone telephone book in name or the menu option that is associated of telephone number sequence in the dtmf dialing function choosing-item is set, the telephone number sequence of storing in this option and the cell-phone telephone number book is associated, for each telephone number sequence that is stored in the cell-phone telephone number book, after the user chooses its dtmf dialing function choosing-item in modes such as buttons, MMI software foreground program initiatively calls backstage dtmf dialing program, realizes the dtmf dialing function.Concrete steps comprise:
Press menu option by the user;
Enter menu option;
The choice menus option; With
Carry out menu function, send the dtmf dialing request to dtmf dialing background task program.
Dtmf dialing background task program also is the dtmf dialing program, is responsible for receiving the foreground call request, reads the telephone number sequence that the user chooses, and mobile phone volume is adjusted to maximum, utilizes the method that software is synthetic or hardware generates to produce dtmf dialing sound sequence.
Referring to Fig. 3 a, produce the theory diagram of dtmf dialing sound sequence for typically utilizing mobile phone (or palmtop PC or PDA) system.Comprise central processing unit and the input unit that is connected with central processing unit respectively, D/A, display screen and memory, loud speaker is connected with D/A, stores telephone directory book and DTMF digital signal file in the memory.This structure can be used for realizing that the aforementioned software approach that utilizes produces dtmf dialing sound sequence.
Storage DTMF digital signal file in memory produces dtmf dialing sound sequence by calling DTMF digital signal file.
This DTMF digital signal file is a plurality of files that can be used to be combined into any dtmf dialing sound sequence signal that are stored in mobile phone (or palmtop PC or PDA) memory, as 12 respectively corresponding " 0 ", " 1 " ... " 8 ", " 9 ", " * ", and the dtmf signal of " # ".In order to increase the reliability of dialing, should increase the signal duration of each file of being stored, increase to 100ms as 30ms by standard, also the signal duration of each file that can store is set to 50ms, repeat playing twice under software control, just can realize the output of a 100ms signal duration.
The digital dtmf signal sequence of number sequence shown in Fig. 5 a " 1122 ", the signal duration is 100 milliseconds, 100 milliseconds of two signal interbody spacers.The signal file of storage can compressed processing, also can be (A represents signal amplitude among the figure, numeral sampled point or sampling instant under the transverse axis) that uncompressed was handled.
Memory in order to storage dtmf signal file, be meant that all can be used for storing the device of digital dtmf signal in the mobile phone (or palmtop PC or PDA), can be the ROM of mobile phone (or palmtop PC or PDA) lining, EPROM, the FLASH memory, the part of curing data also can be the peripheral chip of mobile phone (or palmtop PC or PDA) in mobile phone (or palmtop PC or PDA) chip, for example recording chip etc.
In conjunction with referring to Fig. 3 b, be to utilize software mode to generate the first method flow process of dtmf dialing sound sequence.After the user has selected the number that will dial and has started dialing, generate dtmf dialing sound sequence according to the following step, suppose that the telephone number figure place that will produce is designated as N, current is the K time generation dtmf signal, is designated as figure place K:
The 1st step produced dtmf signal, beginning;
In the 2nd step, initialization obtains the user and chooses number sequence, and current figure place K is changed to 1;
In the 3rd step, obtain and K the initial address of DTMF digital signal file in memory that number is corresponding;
The 4th the step, read stored in this address with pairing pair of audio digital signals of K number;
The 5th step is to carrying out D/A switch with K the pairing digital dual audio signal of number;
The 6th step, loudspeaker plays simulated dual audio signal;
In the 7th step, figure place mark K increases 1 (K=K+1);
The 8th step, is K greater than N? if K 〉=N then entered for the 10th step, finish the process of whole generation dtmf signal, if K＜N then entered for the 9th step, repeated execution of steps 3 is to step 8 then;
In the 9th step, 100 milliseconds at interval turned back to for the 3rd step, and it is next to continue generation, and promptly (K+1) individual dtmf signal repeats the 3rd and goes on foot the 8th process that goes on foot;
The 10th step, the production process of end dtmf signal.
Wherein, read the initial address of digital dual audio signal in the 3rd step, be by the number title, and then search the initial address of the digital dual audio signal file of this number correspondence, obtaining this address is to prepare for step 4 reading of data, shown in Fig. 3 c, the left side is the number title among the figure, and the right side is digital dual audio signal file the initial address in memory corresponding with the number title.
In addition, in the 4th step,, then also should decode earlier, and then deliver to the D/A conversion and the broadcast of raising one's voice if the digital dual audio signal file that reads is encoded compression.
Referring to Fig. 4, be to utilize software mode to generate the second method flow process of dtmf dialing sound sequence.
Storage DTMF digital signal file in memory produces dtmf dialing sound sequence by calling DTMF digital signal file.
This DTMF digital signal file is a plurality of single audio signal files that are stored in the mobile phone memory, can be used to be combined into any dtmf dialing sound sequence signal, as 7 single audio signal files that are used to produce any one dialing tone sequence, correspond respectively to DTMF high frequency group frequency 1209Hz, 1336Hz and 1477Hz, and low frequency group frequency 697Hz, 770Hz, 852Hz and 941Hz, totally 7 frequencies, each single audio signal file storage is a single audio signal.7 single audio signal files make up in twos, just can satisfy generation " 0 "～" 9 ", " * ", " # " dtmf signal of any number in totally 12 numbers.
The duration of each single audio signal file also should be at least 30ms, but in order to increase the reliability of dialing, should increase the duration of signal, and as 100ms, its implementation can same first method.
Number sequence shown in Fig. 5 a is the digital dtmf signal sequence of " 1122 ".
The memory in order to the storage simple signal of indication can be all devices that can be used for storing digital signal in the mobile phone, can be the ROM of mobile phone (or palmtop PC or PDA) lining, EPROM, the FLASH memory, the part that is used for curing data in mobile phone (or palmtop PC or PDA) chip, also can be the peripheral chip of mobile phone (or palmtop PC or PDA), recording chip etc. for example.
Among Fig. 4, after the user has selected the number that will dial and started dialing, generate dtmf dialing sound sequence according to illustrated steps, suppose that the telephone number figure place that will produce is N, current is the K time generation dtmf signal, is designated as figure place K;
The 1st step produced dtmf signal, beginning;
In the 2nd step, initialization obtains the user and chooses number sequence, and current figure place K is changed to 1;
In the 3rd step, obtain and K the initial address of low frequency digital single audio signal file in memory that number is corresponding;
In the 4th step, obtain and K the initial address of high-frequency digital single audio signal file in memory that number is corresponding;
In the 5th step,,, obtain double-tone dtmf signal frequently by corresponding sampled point addition with high frequency, the low-frequency digital signal of storing in the address;
In the 6th step, K the pairing digital dual audio signal of number carried out D/A switch;
The 7th step, loudspeaker plays simulated dual audio signal;
In the 8th step, figure place mark K increases 1 (K=K+1);
The 9th step, is K greater than N? if K 〉=N then entered for the 11st step, finish the process of whole generation dtmf signal, if K＜N then entered for the 10th step, repeated execution of steps 3 is to step 9 then;
In the 10th step, 100 milliseconds at interval turned back to for the 3rd step, and it is next to continue generation, and promptly (K+1) individual dtmf signal repeats the 3rd and goes on foot the 9th process that goes on foot;
The 11st step, the production process of end dtmf signal.
Wherein, in the 5th step, if the encoded compression of digital mono-audio signal file (comprising high and low frequency) of storage, the back addition of then should decoding earlier, and then deliver to the D/A conversion and the broadcast of raising one's voice.
In addition, two single audio signal files are when the direct addition of the numerical value of making corresponding sampled point, forming a sampled point numerical value of double-audio signal, should consider the problem that additive value can not overflow, in order to avoid signal amplitude distortion, the method of avoiding this problem to produce can be carried out addition again and solves by dwindling the sampled point amplitude earlier.
Referring to Fig. 6, be the third method flow that utilizes software mode generation dtmf dialing sound sequence, promptly utilize the computing function of mobile phone, calculate and produce dtmf signal.
A DTMF double-audio signal is combined by two single audio signals, establishes f
1And f
2Be respectively two single audio frequency frequency values of corresponding each number, double-audio signal can be regarded as two respectively with f
1And f
2Sinusoidal or the periodically addition of cosine function for the periodicity of frequency.
Be depicted as the digital dtmf signal sequence of number sequence " 1122 " as Fig. 5 a, be depicted as the digital dtmf signal of number among Fig. 5 a " 1 " as Fig. 5 b, be by constantly 1,2,3 ..., 15 (n=15) i.e. amplitude A (V during 15 sampled points
n) the data flow track formed, sample frequency is 8000Hz among the figure.15 sampled points of the low frequency signal of corresponding number " 1 " shown in Fig. 5 c, f
1=596Hz, 15 sampled points of the high-frequency signal of corresponding number " 1 " shown in Fig. 5 d, f
2=1209Hz.Digital dtmf signal among Fig. 5 b be among Fig. 5 c and Fig. 5 d two simple signals and.
Above-mentioned two signal plus can be used following formulate:
Wherein n represents the current location of discrete-time series, f
1And f
2Be respectively two kinds of frequency values of each number correspondence, f
nBe signals sampling frequency, for example f
n=8000Hz, A
1And A
2Be amplitude or gain coefficient, generally can allow A
1=A
2, φ 1 and φ 2 are respectively phase pushing figures, default value can be zero.Data flow V
nConstantly output produces dtmf signal.
Among Fig. 6, after the user has selected the number that will dial and started dialing, generate dtmf dialing sound sequence according to illustrated steps, suppose that the telephone number figure place that will produce is N, current is the K time generation dtmf signal, is designated as figure place K;
The 1st step produced dtmf signal, beginning;
The 2nd step, obtain the user and choose number sequence, initialization is changed to 1 with current figure place K;
The 3rd goes on foot, and obtains two frequency f 1 of the dtmf signal of K number correspondence, f2;
In the 4th step, set current dtmf signal data flow since n point, n=0;
In the 5th step, obtain the value that current dtmf signal data flow n is ordered according to formula (1);
The 6th step, data flow is sent to speech processing circuit, carry out digital-to-analogue conversion;
In the 7th step, export by loud speaker after the power amplification;
In the 8th step, the n that counts adds 1 (n=n+1);
Do you in the 9th step, satisfy duration requirement (as 100ms)? be then to enter for the 10th step, otherwise went to for the 5th step;
In the 10th step, figure place mark K increases 1 (K=K+1);
The 11st step, 100 milliseconds at interval of joining days;
The 12nd step, is K greater than N? if K 〉=N then entered for the 13rd step, finish the process of whole generation dtmf signal, if K＜N then returned for the 3rd step, repeated execution of steps 3 is to step 12;
In the 13rd step, dtmf signal produces and finishes.
Referring to Fig. 7, the handset structure (except that radio-circuit, the basic structure of palmtop PC or PDA is to that indicated in the drawings identical, no longer exemplifies) when utilizing hardware to generate dtmf signal shown in the figure.The mobile phone original structure mainly comprises power circuit 712, control circuit 701, memory 706, radio-circuit 707, speech processing circuit 705, LCD display 708, user interface 709, shows with light-emitting diode 711, buzzer BZ, motor M, loud speaker 704, microphone 710 etc., increased and adopted the dual tone multi-frequency signal generator 702 of finished product integrated circuit (as dtmf code device TMS320C10, the HT9200A/9200B type DTMF generator of producing as HOLTEK company) and amplifier 703, under control circuit 701 controls, produce the dtmf signal sequence successively.
Referring to Fig. 8 in conjunction with referring to Fig. 7, after the user has selected the number sequence that will dial and has started dialing, cell phone control circuit 701 control DTMF generators 702 are by following steps in sequence generation dtmf signal, if the telephone number figure place that produces is designated as N, current is the K time generation dtmf signal, is designated as figure place K.
The 1st step produced dtmf signal, beginning;
In the 2nd step, initialization is changed to 1 with current figure place K;
In the 3rd step, control circuit 701 sends the control signal of representing K number to DTMF generator 702;
In the 4th step, DTMF generator 702 produces and K the dtmf signal that number is corresponding, delivers to amplifier 703;
In the 5th step, loud speaker 704 is delivered in the dtmf signal amplification that amplifier 703 will be corresponding with K number;
The 6th step, loud speaker 704 play through amplify with K the dtmf signal that number is corresponding;
In the 7th step, figure place mark K increases 1 (K=K+1);
The 8th step, is K greater than N? if K 〉=N then entered for the 10th step, finish the process of whole generation dtmf signal, if K＜N then entered for the 9th step, repeated execution of steps 3 is to step 8 then;
In the 9th step, the 3rd step was returned in 100 milliseconds at interval, and it is next to continue generation, and promptly (K+1) individual dtmf signal repeats the 3rd and goes on foot the 8th process that goes on foot;
In the 10th step, produce dtmf signal and finish.
In embodiment illustrated in fig. 7, also can adopt two audio-frequency generator integrated circuits that can once produce the dtmf signal sequence of finished product, disposable this DTMF generator of delivering to of telephone number sequence that control circuit is chosen the user, have the dtmf signal sequence of Fixed Time Interval by this DTMF generator according to automatic generation of the number sequence that receives, control circuit need not to consider two time intervals between numerical signal.Dtmf signal is gone out by amplifier, loudspeaker plays.
The present invention fills the telephone directory function that part is utilized mobile phone or palmtop PC or PDA (Personal Digital Assistant) (PDA), choose telephone number sequence the user, and after the loud speaker of mobile phone or palmtop PC or PDA (Personal Digital Assistant) (PDA) being aimed at the microphone of DTMF fixed telephone, only need press mobile phone or palmtop PC or PDA (Personal Digital Assistant) (PDA) and go up the function key of setting, activate its dtmf dialing function, just can produce needed dtmf dialing sound sequence, enter the microphone of fixed telephone, realize the dial-in direct of telephone set.Produce needed dtmf dialing sound sequence and then the several different methods that comprises hardware, software can be arranged.
Claims (16)
1. the audio frequency dial-in direct method of a double tone multiple frequency telephone set is characterized in that comprising following treatment step:
A. the telephone number sequence of storing in the audio frequency dial-in direct device number book is generated DTMF pulsing sound sequence;
B. the receiver by the dual-tone multifrequency fixed telephone directly receives this DTMF pulsing sound sequence, carries out DTMF pulsing.
2. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 1 is characterized in that described steps A, further comprises:
A1., the DTMF pulsing function choosing-item that is associated with telephone number sequence in the audio frequency dial-in direct device is set in audio frequency dial-in direct device software;
A2. after the DTMF pulsing function choosing-item is activated, be the touch-tone signal of each number generation correspondence in the telephone number sequence of choosing by the touch-tone signal maker;
A3. touch-tone signal corresponding with each number in the telephone number sequence is chosen by the loud speaker output of audio frequency dial-in direct device in the compartment of terrain.
3. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 2, it is characterized in that: being associated among the described step a1, be with audio frequency dial-in direct device telephone directory book in name or the menu option that is associated of telephone number sequence in the DTMF pulsing function choosing-item is set, the telephone number sequence of storing in this function choosing-item and the audio frequency dial-in direct device telephone directory book is associated, after the user chooses the dtmf dialing function choosing-item that is stored in a telephone number sequence in the audio frequency dial-in direct device telephone directory book, initiatively call Dual Tone Multifrequency dialing background task program by man-machine interface (MMI) foreground program, realize the Dual Tone Multifrequency dialing.
4. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 2 is characterized in that among the described step a2, and the method that the touch-tone signal maker generates touch-tone signal is:
A21. will with each dial key content corresponding audio as constituent instruments, be stored in the memory bank of audio frequency dial-in direct device;
A22. from memory bank, access corresponding constituent instruments by the telephone number sequence order, play at interval.
5. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 4 is characterized in that:
Among the described step a21, the duration of the constituent instruments of storage is set to definite value;
Among the described step a22, be that the constituent instruments of definite value are play continuously, make the actual play duration greater than 30ms to duration.
6. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 4 is characterized in that:
Among the described step a21, the duration of the constituent instruments of storage is set to the definite value greater than 30ms;
Among the described step a22, to duration for once to play greater than the constituent instruments of 30ms definite value.
7. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 4 is characterized in that: among the described step a21, also comprise each constituent instruments is carried out storing after the data compression process; Among the described step a22, also comprise the constituent instruments of reading from the memory back of decompressing is play at interval.
8. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 2 is characterized in that among the described step a2, and the method that the touch-tone signal maker generates touch-tone signal is:
Each single-frequency that a23. will make up touch-tone signal is stored in the memory bank of audio frequency dial-in direct device as constituent instruments;
A24. from memory bank, once access corresponding two constituent instruments by the telephone number sequence order, make up the back and play at interval.
9. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 8 is characterized in that:
Among the described step a23, the duration of the constituent instruments of storage is set to definite value;
Among the described step a24, be that the constituent instruments of definite value are play continuously, make duration greater than 30ms to duration.
10. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 8 is characterized in that:
Among the described step a23, the duration of the constituent instruments of storage is set to the definite value greater than 30ms;
Among the described step a24, to duration for once to play greater than the constituent instruments of 30ms definite value.
11. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 8 is characterized in that:
Among the described step a23, also comprise each constituent instruments is carried out storing after the data compression process; Among the described step a24, also comprise the constituent instruments of reading from the memory back of decompressing is play at interval.
12. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 2 is characterized in that:
Among the described step a2, described touch-tone signal maker generates the method for touch-tone signal, be sine or the cosine function that utilizes two the single-frequency frequency values corresponding with each telephone number, constantly discrete at n, calculate each amplitude of respective signal constantly respectively, n amplitude formed and the corresponding touch-tone signal data of telephone number, and n is a positive integer;
Press the telephone number sequence order output data corresponding, produce DTMF pulsing sound sequence with each number.
13. the audio frequency dial-in direct method of a kind of double tone multiple frequency telephone set according to claim 2 is characterized in that: among the described step a3, comprise also that simultaneously the output volume with audio frequency dial-in direct device is adjusted to maximum.
14. the audio frequency dial-in direct device of a double tone multiple frequency telephone set is characterized in that:
Described dialing mechanism is mobile phone or palmtop PC or the PDA (Personal Digital Assistant) that is provided with the DTMF pulsing function, comprise dual tone multi-frequency signal generator and the amplifier that is attached thereto, the control end of dtmf generator is connected with the control circuit of mobile phone or palmtop PC or PDA (Personal Digital Assistant), and amplifier out is connected with the loud speaker of mobile phone or palmtop PC or PDA (Personal Digital Assistant).
15. the audio frequency dial-in direct device of a kind of double tone multiple frequency telephone set according to claim 14 is characterized in that: described dtmf generator is an integrated circuit modules that can produce each touch-tone signal successively.
16. the audio frequency dial-in direct device of a kind of double tone multiple frequency telephone set according to claim 14 is characterized in that: described dtmf generator is an integrated circuit modules that can once produce the dual-tone multifrequency sequence signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021040079A CN1151654C (en) | 2002-02-26 | 2002-02-26 | Audio frequency directly dialing method and device for double tone multiple frequency telephone set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021040079A CN1151654C (en) | 2002-02-26 | 2002-02-26 | Audio frequency directly dialing method and device for double tone multiple frequency telephone set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1365222A true CN1365222A (en) | 2002-08-21 |
| CN1151654C CN1151654C (en) | 2004-05-26 |
Family
ID=4739971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021040079A Expired - Fee Related CN1151654C (en) | 2002-02-26 | 2002-02-26 | Audio frequency directly dialing method and device for double tone multiple frequency telephone set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151654C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448241C (en) * | 2004-12-30 | 2008-12-31 | 集嘉通讯股份有限公司 | Portable communication device capable of sounding double tones in multiple frequencies, and sounding method |
| CN102025849A (en) * | 2009-09-17 | 2011-04-20 | 法国电信公司 | Coding and decoding method for uniform resource identifier, corresponding computer program and device |
| CN103647864A (en) * | 2013-12-02 | 2014-03-19 | 广州广哈通信股份有限公司 | A method for generating a signal source and a system thereof |
| CN104092805A (en) * | 2013-04-01 | 2014-10-08 | 深圳富泰宏精密工业有限公司 | Communication device dialing method and system |
| CN108574538A (en) * | 2017-03-08 | 2018-09-25 | 深圳市零壹移动互联系统有限公司 | A method of the coding based on dual-tone multifrequency and vocal print code communication |
-
2002
- 2002-02-26 CN CNB021040079A patent/CN1151654C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448241C (en) * | 2004-12-30 | 2008-12-31 | 集嘉通讯股份有限公司 | Portable communication device capable of sounding double tones in multiple frequencies, and sounding method |
| CN102025849A (en) * | 2009-09-17 | 2011-04-20 | 法国电信公司 | Coding and decoding method for uniform resource identifier, corresponding computer program and device |
| CN104092805A (en) * | 2013-04-01 | 2014-10-08 | 深圳富泰宏精密工业有限公司 | Communication device dialing method and system |
| CN104092805B (en) * | 2013-04-01 | 2018-09-07 | 深圳富泰宏精密工业有限公司 | Communication apparatus Dialing Method and system |
| CN103647864A (en) * | 2013-12-02 | 2014-03-19 | 广州广哈通信股份有限公司 | A method for generating a signal source and a system thereof |
| CN108574538A (en) * | 2017-03-08 | 2018-09-25 | 深圳市零壹移动互联系统有限公司 | A method of the coding based on dual-tone multifrequency and vocal print code communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151654C (en) | 2004-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1196372C (en) | Portable telephone set | |
| CN1072884C (en) | Telephone | |
| CN1170452C (en) | Mobile communication terminal device and method for identifying input call thereof | |
| CN1852364A (en) | Dialing terminal control method of individual information and terminal device using same | |
| CN1852358A (en) | Method for controlling business multiple fore ward-converting nested calling | |
| CN1859489A (en) | System and method for unloading called user audible ringing tone relative content by main call user | |
| CN1121299A (en) | Radio communication apparatus having a plurality of identification codes | |
| CN1812442A (en) | Intelligent identifying and answering method for incoming call and intelligent answering device and use thereof | |
| CN1612580A (en) | Mobile phone system with incoming melody designating function and mobile phone | |
| CN1258949C (en) | Wireless telephone and wireless telephone system | |
| CN1878203A (en) | Mobile communication terminal capable of synthesizing speech and background sound | |
| CN101031097A (en) | Method, system and apparatus for realizing echo-bell service | |
| CN1617618A (en) | System and method for providing background music | |
| CN1901707A (en) | Monitoring mobile phone and its remote monitoring method | |
| CN1151654C (en) | Audio frequency directly dialing method and device for double tone multiple frequency telephone set | |
| CN1874389A (en) | Terminal for broadcast and literal speech communicationg method for the same | |
| CN1165461A (en) | Telephone system and voice encoding/decoding method | |
| CN101076153A (en) | Call transferring method and terminal equipment | |
| CN1708073A (en) | Incoming calling receiving method | |
| CN1863236A (en) | Mobile phone capable of transmitting preset speech information and relative method thereof | |
| CN1413059A (en) | Information terminal equipment, communication method and storage medium for stored correlative program | |
| CN1741549A (en) | System and method for realizing colour bell service | |
| CN2532631Y (en) | Audio frequency direct dialing device for double sound multi-frequency telephone set | |
| CN1426220A (en) | Wireless telephone of internet | |
| CN1635771A (en) | Method for implementing voice mail box in intelligent network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |