CN2391277Y - Speed-variable digital real-time recording and playing device capable of keeping voice naturalness - Google Patents

Abstract

A speed-variable digital real-time recorder-playback device able to keep the naturalness of speech features that it contains controller board consisting of scan keyboard with parallel interface at output end, microprocessor operated by keyboard, memory and latch serially connected between parallel interface and microprocessor, vocoder board, vocoder controlled by microprocessor, PCM codec for inputting and outputting recorded and played signals and decompressing or compressing the serial digital speech signals, flash memory controlled by vocoder, and interface board. It can be used for recording and sorting, and can implement real-time speed-variable sectional playback, and its speech naturalness is not changed.

Description

The digital recording and playing device in real time of speed change that can keep the voice naturalness

A kind of digital recording and playing device in real time of speed change of voice naturalness that keeps belongs to digital recording playback machine manufacturing technology field.

Compare with the tape recording technology, the digital recording technology still can keep the voice naturalness constant when changing playing speed.Current digital recording technology is mainly used in two aspects, first broadband stereophonic recording such as CD, walkman, MP3 player etc., and another kind of is the digital phone recording.The former is applied in amusement, leisure place, playing time was generally about one hour, this digital stereo music must have specialized apparatus to finish coding and compression work, technical sophistication and be non real-time, the latter is the phone frequency range voice record that belongs to 300HZ 3400HZ, and record length is within 15 minutes.They can't be directly used in the arrangement of recording materials, this be because: they can't carry out the numeral voice record for a long time; They are non real-times, can't still keep the voice naturalness under the condition of high and low speed speed playback, can not carry out segmentation to voice, and from any position playback of each voice segments.

The purpose of this utility model is to provide a kind of digital recording and playing device in real time of speed change of the kept voice naturalness that can carry out the numeral voice recording playback for a long time in real time of the arrangement usefulness of recording.

Of the present utility model being characterised in that: it is made of vocoder plate, the controller utmost point and interface utmost point JI, wherein, the vocoder plate contains: with the vocoder U1 of chip D6471-11 system, with the flash memory U5～U8 of chip 29V1600RTS system, separate scrambler U2, serve as the recording amplifying circuit U3 that has microphone MIC of main system and serve as the playback signal amplification circuit that has loudspeaker SPK of main system with chip LM386 with chip MC3407 with the PCM of chip TP3054DW system; Controller board contains: with the microprocessor U10 of chip ATM89C51 system, with the data address latch U12 of chip 74LS373 system, with the EPROM read-only storage U13 of chip 2764 systems, with the parallel interface U10 of chip 8255 systems, with chip 74LS20 system or a NAND gate circuit U9 and keyboard special K1; The line output end 5 of 2 * 4 matrixes of keyboard special K1,6 and row output terminal 1～4 respectively with the input end PA4 of parallel interface U10, PA5 links to each other with PA0～PA3, output terminal D0～D7 of parallel interface U10 links to each other with input end D0～D7 of read-only storage U13, output terminals A 0～A12 of this storer U13 links to each other with A8～A12 of microprocessor U11, wherein output terminals A 0～A7 of this storer U13 links to each other with input end Q0～Q7 of latch U12 again, output terminal D0～D7 of latch U12 then links to each other with input end D0～D7 of microprocessor U11, the RD of parallel interface U10, WR end then with the corresponding output end RD of microprocessor U11, WR links to each other, the low level output terminals A 0 of this interface U10, A1 also respectively with the input end D0 of microprocessor U11, D1 links to each other, it is the main reset circuit that constitutes that their continuous backs of both reset terminal RESFT are inserted with reset button K, the data of latch U12, the ALE/ P end of address sorting end LE and microprocessor U11, the controlled end OE of read-only storage U13 and the control end PSEN of microprocessor U11 link to each other, the row output terminal 1～4 of keyboard special K1 again through or a NAND gate circuit U9 after link to each other with the INT1 of microprocessor U11 end, the operational order output terminal INT0 of microprocessor U11, data address output terminal D0～D7 is respectively through the ACL of interface board J1 end, 3 ends of D0～D7 end back and vocoder U1 link to each other with D7～D0 end, 23 whiles of steering order output terminal of vocoder U1 and the FSX of PCM codec U2, the FSR end links to each other, its position and frame synchronizing signal output terminal DR0, DX0 respectively with the DX of PCM codec U2, the DR end links to each other, it is read, write command output FRD, FWR respectively with the CLE of each flash memory U5～U8, ALE, OE, WE links to each other simultaneously, sheet selects instruction output end CS0～CS3 to link to each other with CS0～CS3 end of each flash memory U5～U8 respectively, data address output, go into to hold MD0, MD1 links to each other simultaneously with D0～D7 of each flash memory U5～U8 respectively, serial digital voice signal output behind PCM codec U2 coding or the decompress(ion), go into to hold BCX, interconnect with 20 of vocoder U1 after the MCX parallel connection, the recorded audio signals input end GSX of PCM codec U2, the V-end links to each other with the output terminal of recording amplifying circuit U3, and the input end of its playback signal output part VFRO and playback signal amplification circuit U4 links to each other.

Evidence: it is the recording playback sound for a long time, can keep the voice naturalness constant under speed change playback condition, also can be in real time to voice segment, and can be in any position playback of each voice segments.

In order in conjunction with the embodiments the utility model to be done detailed describing below, show as follows present specification used accompanying drawing number and title brief introduction:

Fig. 1: the digital theory diagram of recording and playing device in real time of speed change that can keep the voice naturalness;

Fig. 2: the circuit theory diagrams of vocoder plate;

Fig. 3: the circuit theory diagrams of controller board.

Embodiment:

Ask for an interview Fig. 1,2,3.Among Fig. 1, double-lined arrow is a data/address line, and the single line arrow is a control line.Interface board J1 adopts chip 89C51, its H/L, and RES, HWR, each end of HRD link to each other with each respective end of parallel interface U10, and the PC5～PC7 by parallel interface U10 removes to control the recording parameter display circuit again; The PB4 of U10～PB7 end is the state of a control display circuit, omits herein.The model of keyboard special K1 is KB-8 _H, it is provided with record button R, playback button P, and recording parameter is selected add-substract key "+" and "-" key, file options button S, file purging key C, execution/stop key M and Pause key O.The output of keyboard special K1 is 2 * 4 matrix binary codes, the INTI end that a column information warp that 1～4 pin of keyboard special K1 is sent or a NAND gate circuit U9 are sent to microprocessor U11 is made control command and is used, play the voice switch effect, matrix information then is sent to parallel interface U10, under microprocessor U11 control, deposit read-only storage U13 in, under microprocessor U11 control, these information are sent into D0～D7 end of microprocessor U11 for its matrix information scanning usefulness to keyboard special K1 output, to determine action type and relevant ginseng recording parameter through latch U12.Meanwhile, the INT0 of microprocessor U11 end, D0～D7 end are respectively through the ACK of interface board J1 end, and D0～D7 end is sent to 3 ends and the D0～D7 end of vocoder U1 to them respectively, goes to carry out the operational order that keyboard special K1 assigns after it is confirmed.These operational orders have four kinds, and existing branch is chatted as follows:

1, numeral voice record: recording order R and the recording parameter options button "+" assigned according to keyboard special K1, digital speech compressibility that "-" determines and the recording of voice switch function on, voice signal becomes electric signal to the speech fluctuations conversion of signals through microphone MIC, amplify through amplifying circuit U3, analog voice signal after the amplification is passed to the GSX of PCM codec U2, V one end, to carry out pulse code modulation (PCM), this PCM codec U2 also receives the DR0 from vocoder U1 simultaneously, position and frame synchronizing signal that the DR1 end is sent here, 64KB PCM serial digital voice signal behind PCM codec U2 coding is through the BCX of PCM codec U2, the MCX end is sent to 20 ends of vocoder U1 so that it is carried out the linear prediction compression, actual bit rate after the compression is determined that by recording order R and recording parameter the numeral voice signal after the compression is just held FWR writing of vocoder U1, the sheet choosing end CS0～following MD0 of CS3 control from vocoder U1, the MD1 end is input to each flash memory U5～U8.If in the time of must be to the voice segment of record, just this section voice segment is given in the order that vocoder U1 selects add-substract key "+", "-" key to assign according to recording parameter.

2, numeral voice playback: reproduction command P that assigns according to keyboard special K1 and play parameter options button "+", "-" determined playback document number, playing speed when volume etc. start playback.Microprocessor U11 just sends the request of playback specified file to vocoder U1, after confirming, vocoder U1 just takes out corresponding voice document by its FRD end, CS0～CS3 end from flash memory U5～U8, behind the speed change play parameter decompress(ion) that vocoder U1 sends here according to microprocessor U11, just being sent to PCM codec U2 through 20 ends of vocoder U1 decodes, decoded analog voice signal just is sent to playback signal amplification circuit U4 through its VFRO end and carries out playback.When speed change is put soon, in the free time of digital speech, separate the hematocrit preface free time is shortened, when speed change was put slowly, it can make the free time of voice prolong, thereby finished the speed change player function of natural phonation.

3, file search: the file search order S that assigns according to keyboard special K1, microprocessor U11 sends the file search request to vocoder U1, after confirming, vocoder U1 promptly visits flash memory U5～U8, obtain voice document sum and effective storage space, these data are delivered to microprocessor U11 by interface board J1, and it sends demonstration to these data again.

4, file purging: the file purging order C that assigns according to keyboard special K1, select the voice document that is eliminated number by "+", "-" key again, after confirming, press the M key, can remove the voice document of appointment.

This device record length mostly is 8 hours most, can divide 99 sections at most when segmentation is recorded, and its playback gear ratio is 1: 0.5 (putting slowly), and 1: 1.5 (putting soon) and 1: 2.0 (putting at a high speed) third gear still can keep the naturalness of voice constant when the speed change playback.It also has voice switch function and digital volume to regulate.

Claims (3)

1, the digital recording and playing device in real time of speed change that can keep the voice naturalness, contain sound decoding circuit, coding, compressor circuit and recording and playing circuit, it is characterized in that: it is by the vocoder plate, controller board and interface board J1 constitute, wherein, the vocoder plate contains: with the vocoder U1 of chip D6471-11 system, flash memory U5～U8 with chip 29V1600RTS system, PCM with chip TP3054DW system separates scrambler U2, serve as the recording amplifying circuit U3 that has microphone MIC of main system and serve as the playback signal amplification circuit that has loudspeaker SPK of main system with chip MC3407 with chip LM386; Controller board contains: with the microprocessor U10 of chip ATM89C51 system, with the data address latch U12 of chip 74LS373 system, with the EPROM read-only storage U13 of chip 2764 systems, with the parallel interface U10 of chip 8255 systems, with chip 74LS20 system or a NAND gate circuit U9 and keyboard special K1; The line output end 5 of 2 * 4 matrixes of keyboard special K1,6 and row output terminal 1～4 respectively with the input end PA4 of parallel interface U10, PA5 links to each other with PA0～PA3, output terminal D0～D7 of parallel interface U10 links to each other with input end D0～D7 of read-only storage U13, output terminals A 0～A12 of this storer U13 links to each other with A8～A12 of microprocessor U11, wherein output terminals A 0～A7 of this storer U13 links to each other with input end Q0～Q7 of latch U12 again, output terminal D0～D7 of latch U12 then links to each other with input end D0～D7 of microprocessor U11, the RD of parallel interface U10, WR end then with the corresponding output end RD of microprocessor U11, WR links to each other, the low level output terminals A 0 of this interface U10, A1 also respectively with the input end D0 of microprocessor U11, D1 links to each other, it is the main reset circuit that constitutes that their continuous backs of both reset terminal RESFT are inserted with reset button K, the data of latch U12, the ALE/ P end of address sorting end LE and microprocessor U11, the controlled end OE of read-only storage U13 and the control end PSEN of microprocessor U11 link to each other, the row output terminal 1～4 of keyboard special K1 again through or a NAND gate circuit U9 after link to each other with the INT1 of microprocessor U11 end, the operational order output terminal INT0 of microprocessor U11, data address output terminal D0～D7 is respectively through the ACL of interface board J1 end, 3 ends of D0～D7 end back and vocoder U1 link to each other with D7～D0 end, 23 whiles of steering order output terminal of vocoder U1 and the FSX of PCM codec U2, the FSR end links to each other, its position and frame synchronizing signal output terminal DR0, DX0 respectively with the DX of PCM codec U2, the DR end links to each other, it is read, write command output FRD, FWR respectively with the CLE of each flash memory U5～U8, ALE, OE, WE links to each other simultaneously, sheet selects CS0～CS3 end of instruction output end CS0～CS3 storer U5～U8 to link to each other, data address output, go into to hold MD0, MD1 links to each other simultaneously with D0～D7 of each flash memory U5～U8 respectively, serial digital voice signal output behind PCM codec U2 coding or the decompress(ion), go into to hold BCX, interconnect with 20 of vocoder U1 after the MCX parallel connection, the recorded audio signals input end GSX of PCM codec U2, the V-end links to each other with the output terminal of recording amplifying circuit U3, and the input end of its playback signal output part VFRO and playback signal amplification circuit U4 links to each other.

2, the digital recording and playing device in real time of speed change that keeps the voice naturalness according to claim 1, it is characterized in that: described interface board J1 adopts chip ATM8C51.

3, the digital recording and playing device in real time of speed change that keeps the voice naturalness according to claim 1, it is characterized in that: the model of described keyboard special K1 is DB-8 _H, it has record button R, recording parameter to select to add, subtract key "+" key and "-" key, file options button S, file purging key C, execution/stop key M and Pause key O.

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