CN1178964A - Sound signal processor - Google Patents
Sound signal processor Download PDFInfo
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- CN1178964A CN1178964A CN 97117177 CN97117177A CN1178964A CN 1178964 A CN1178964 A CN 1178964A CN 97117177 CN97117177 CN 97117177 CN 97117177 A CN97117177 A CN 97117177A CN 1178964 A CN1178964 A CN 1178964A
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Abstract
An acoustic signal processing device used in, for example, karaoke systems, includes a signal processor, a digital/analog converter and a mixer. The signal processor converts the input analog acoustic signal into a digital signal and processes the converted digital signal by signal processing for generating a digital signal added to with pre-set acoustic characteristics. The digital/analog converter converts the digital signal generated by the signal processor into an analog signal. The mixer mixes the input analog signal with the analog signal outputted by the digital/analog converter.
Description
The present invention relates to a kind of audio-signal processing apparatus.More particularly, relate to a kind of will preset sound property be added to the input voice signal on audio-signal processing apparatus.
This assignee has proposed a kind of audio-signal processing apparatus in being entitled as the Japanese patent application that " audio-signal processing apparatus " sequence number is 6-176775 (Jap.P. prospectus 8-44389), wherein with the sound of input with have one with the sound lifting one of input to preset the sound of interval of tone synthetic, so that a kind of sound effect (same sound effective value) is provided, promptly wherein as there being many people singing, although only a people is singing." in unison " here be meant with the method for synchronization and sing or playing music.
Fig. 1 represents to be used to produce audio-signal processing apparatus with sound effective value according to what propose in Jap.P. prospectus 8-4389 with calcspar.This audio-signal processing apparatus 101 comprises: be used for amplifying the input signal from microphone (M-IN), for example through microphone amplifier 102 (not shown)s of the performing artist's of microphone input sound, and be used for to be transformed to the A/D transducer 103 of digital audio signal through the voice signal that microphone amplifier 102 amplifies.Audio-signal processing apparatus 101 also comprises: with an acoustic generator 104 and a line amplifier 105, this amplifier 105 is used for amplification input signal (L-IN), is for example also comprised by the musical performance signal sound signal processing apparatus 104 that CD (CD) transcriber or VCD (optic disk) transcriber reproduce as sound accompaniment: the musical performance signal transformation that is used for being amplified by line amplifier 105 is A/D transducer 106, keying circuit 107, music mixing arrangement 108 and the D/A transducer 109 of digital music signal.
The result is that audio-signal processing apparatus 101 is synthetic with the song of singing the different interval of interval that has with this singer with singer's song, even only a performing artist is singing, also can provide same sound effective value, i.e. effect of singing as a lot of performing artists.Audio-signal processing apparatus 101 can also constitute like this, promptly makes it have a plurality of interval change circuit 110 and is used to produce a plurality of different song with different intervals and variant song is synthesized.Utilize audio-signal processing apparatus 101, the mode that the user can choose wantonly selects whether to use same sound effective value, perhaps sets the tone for interval change.
Balanced device 112,116 can be set the required frequency characteristic of end user.The frequency characteristic of balanced device 112,116 can be regulated separately or its adjusting together by two balanced devices.The echo time of the echo that echo processing circuit 114 produces can optional approach be set by the end user.
The output digital signal conversion that utilizes D/A transducer 109 song that combiner circuit 117 is synthetic and music is exported as voice output signal (A-OUT) for simulation song/music signal.
In tut signal processing apparatus 101, input signal from microphone is transformed to digital signal by A/D transducer 103, use by digital signal processing then so that this song has and the different interval of song interval of process microphone input, conversion frequency or blending echo.Because audio-signal processing apparatus 101 carries out signal Processing in the digital signal processing mode, need high accuracy number to handle operation, therefore, need utilize the high-performance A/D transducer 103 and the D/A transducer 109 of a lot of figure places and the higher sample frequency of employing.
The sound quality of audio-signal processing apparatus depends on the performance of employed A/D transducer or D/A transducer D/A transducer to a great extent, if promptly use the A/D or the D/A transducer of the low price of low signal processing accuracy, just can not guarantee the good sound quality.So, need to adopt high signal Processing precision thereby expensive A/D transducer 103 or D/A transducer 109.
In audio-signal processing apparatus 101, if do not adopt by balanced device and improve same sound effective value that frequency characteristic forms or Echo but the sound collected by microphone simply and sound accompaniment are synthesized and produced acoustic output signal (A-OUT), needing increases quantization digit, is used to guarantee to utilize the digital signal processing mode to handle enough dynamic ranges of sound strictly according to the facts.In addition, in order to guarantee the good sound signal quality, need to improve sample frequency.Consequently, make audio-signal processing apparatus 101 hardware configurations complicated, and need to use the A/D and the D/A transducer of high price, therefore improved cost.
In audio-signal processing apparatus 101,, form the delay of presetting owing to microphone signal with the digital signal processing input.In addition, by digital signal processing, when digital signal processing, produce quantizing noise inevitably.Therefore, if audio-signal processing apparatus is applied to the karaoke OK system exported in real time through the signal of microphone input, produce phase differential or time shift at the microphone input signal with between through the harmonic tone signals of digital signal processing formation, perhaps signal to noise ratio (S/N ratio) (SN) can be tending towards reducing.Consider this point, can not realize the sound effect of required excellence.
Therefore, the purpose of this invention is to provide a kind of audio-signal processing apparatus that can address the above problem.
According to the present invention, a kind of audio-signal processing apparatus that for example is used in the Caraok device that provides comprises: signal processor, D/A converter and mixer.Signal processor is transformed to digital signal with the analoging sound signal of input.And by signal Processing the numeral through conversion is handled, produce a stack and have the digital signal that presets sound property.The digital signal conversion that D/A converter will be produced by signal processor is a simulating signal.Mixer mixes the simulating signal of input with the simulating signal of being exported by D/A converter.
Fig. 1 is the calcspar that expression constitutes the audio-signal processing apparatus structure on basis of the present invention.
Fig. 2 is the calcspar according to the audio-signal processing apparatus of first embodiment of the invention.
Fig. 3 is the calcspar of audio-signal processing apparatus according to a second embodiment of the present invention.
Fig. 4 is the calcspar of the audio-signal processing apparatus of a third embodiment in accordance with the invention.
With reference to accompanying drawing, below explain in detail according to audio-signal processing apparatus of the present invention.In following introduction, audio-signal processing apparatus of the present invention is applied to Caraok device.
Fig. 2 represents to embody the calcspar of audio-signal processing apparatus 1 of the present invention.This audio-signal processing apparatus 1 comprises: microphone amplifier 3 is used to amplify the signal (M-IN) by microphone input, for example through the chanteur's (performing artist) of microphone 2 inputs sound; And A/D transducer 4, the analoging sound signal that is used for being amplified by microphone 3 is transformed to digital signal.Audio-signal processing apparatus 1 also comprises sound generator 5 in unison, balanced device echo processor 6 and D/A transducer 7.
Audio-signal processing apparatus 1 also comprises: line amplifier 9, be used to amplify the melody input signal (L-IN) of the music playing signal that is called sound accompaniment, this sound accompaniment is to reappear by adopting as the CD of recording medium or the reproducer of VCD, and these recording mediums record on it and for example are the information lyrics or musical composition information as sound accompaniment.Audio-signal processing apparatus 1 comprises in addition: the music playing signal transformation that is used for being amplified by line amplifier 9 is A/D transducer 10, keying device 11, balanced device 12 and the combiner circuit 13 of digital signal.The output signal of combiner circuit 13 is amplified by output amplifier 14, is provided to loudspeaker 15.
In tut signal processing apparatus 101, utilize combiner circuit 1 17 will with in unison or the output signal of the digital signal of echo signal addition and balanced device 16 synthetic.In audio-signal processing apparatus 1, utilize combiner circuit 13 with need not to utilize the digital signal processing mode with the voice signal output of microphone amplifier 3 with comprise utilize numeral letter device handle and utilize D/A transducer 7D/A conversion with in unison or the effect signal of echo added signal summation or synthetic.Audio-signal processing apparatus 1 comprises: the D/A transducer 7 in balanced device one Echo treatment apparatus 6 downstreams.The output of D/A transducer 7 utilizes combiner circuit 13 synthetic with the output signal from microphone amplifier 3.
Be used for microphone amplifier 3 the output signal conversion A/D transducer 4 and be used for that the output signal of balanced device one Echo treatment apparatus 6 is carried out figure place that the D/A transducer 4 of D/A conversion uses and be less than the figure place of using at the A/D of tut signal processing apparatus 101 transducer 103 or D/A transducer 109.Simultaneously, A/D transducer 4 and D/A transducer 7 can design to such an extent that make sample frequency be lower than A/D transducer 103 or D/A transducer 109 in the tut signal processing apparatus 101.Herein, A/D transducer 4 and D/A transducer 7 can design to such an extent that make and have less figure place and lower sample frequency simultaneously.
Coaural signal generating means 5 comprises sound property translation circuit 5a and combiner circuit 5b.Sound property translation circuit 5a for example utilizes the digital signal processing mode that the voice signal of mouthpiece input is transformed to an interval that has presets tone with respect to the interval lifting one of microphone input signal signal.The interval change tone of sound property translation circuit 5a can be the steady state value that presets or according to utilizing not the testing result of the volume testing circuit of the voice signal that is used to import of expression to control.
The formation of sound property translation circuit 5a is used in record on the recording medium of sound accompaniment and is reappeared by reproducer 8, and the ID signal of sound accompaniment type is described, if recording medium is CD, this signal is as subcode; And be used for the type according to the ID signal is automatically selected tone for realizing the interval optimal mapping.In addition, the formation of sound property translation circuit 5a can be used for according to select the testing result of circuit to select tone from above-mentioned volume.Certainly, these two kinds of substitute modes can comprehensively adopt.The formation of sound property translation circuit 5a can also be used to utilize the digital signal processing mode that the voice signal of input is transformed to one with respect to the interval of the voice signal of importing or the signal of frequency lifting preset tones.
Balanced device echo processor 6 comprises: balanced device 6a, combiner circuit 6b, echo processing circuit 6c and combiner circuit 6d.Balanced device 6a utilizes the digital signal processing mode to proofread and correct and improves frequency characteristic with the output digital signal of acoustic generator 5, produces digital signal calibrated and that improve.Combiner circuit 6b utilizes the digital signal processing mode to synthesize with the output digital signal of acoustic generator 5 and the output digital signal of balanced device 6a.Balanced device echo processor 6 makes whether the end user can should utilize balanced device 6a to come correcting frequency characteristic or should utilize any frequency characteristic with optional approach.By end user operation not expression be installed in the setting that a plurality of switches on the input media can carry out these requirements, perhaps set interval change the time transfer.
The output signal of combiner circuit 6d is transported to D/A transducer 7, then its will by take place in unison 5 and the digital signal conversion handled of balanced device echo processor 6 be simulating signal.
The output digital signal of 11 pairs of A/D transducers 10 of keying circuit is carried out digital signal processing, will become the output digital signal from the interval change of the music playing signal that reappears device 8 as the music playing signal through interval change.Keying circuit 11 make the end user if operation not the input media of expression just can determine whether to carry out keying or digital signal should be transformed to any interval, the mode of setpoint frequency characteristic is identical as mentioned above with making this end user for its mode.
The output digital signal of balanced device 12 is transported to D/A transducer 7 as sound information.D/A transducer 7 is a simulating signal with the output digital signal conversion of balanced device 12.Deliver to combiner circuit 13 by the simulating signal that D/A transducer 7 produces.
Therefore, utilize this audio-signal processing apparatus 1, be used for the tut characteristic is added to from the digital signal processing device on the input signal of microphone, by A/D transducer 4, with generating device 5, balanced device Echo Processing device 6 and D/A transducer 7 constitute, and it can be realized under the situation of the sound tonequality that does not reduce the chanteur, can simplify the hardware configuration of digital signal processing device simultaneously.All be the signal that chanteur's song is had the especial sound effect promptly by the coaural signal of above-mentioned 5 generations of sound generating apparatus in unison or the echo signal that produces by balanced device Echo treatment apparatus 6.These coaural signal and echo signal are auxiliary signals for the song as the chanteur of main signal.Therefore,, figure place is lowered, in the time of on the signal one that will have the especial sound effect is added to main signal, as the output signal of the microphone 2 of main signal variation not itself even being reduced to the sample frequency of the A/D conversion of A/D transducer 4.Therefore, utilize the output (A-OUT) of the synthetic sound of combiner circuit 13 aspect psychologic acoustics, to have justifiable tonequality.
Therefore, utilize audio-signal processing apparatus of the present invention, in fact can obtain fully good sound effect,, just as previously described, therefore, reduced manufacturing cost even the precision of digital signal processing is lowered.
Utilize audio-signal processing apparatus of the present invention, even the figure place of used A/D or D/A transducer and sample frequency all are lower than and are adopted in the device shown in Fig. 1, can be not for example yet because in the restriction of the dynamic range of A/D or D/A transducer, make audio distortions with the superimposed chanteur in the output signal of combiner circuit of coaural signal or echo signal.
With reference to Fig. 3, explain audio-signal processing apparatus 21 according to a second embodiment of the present invention.This audio-signal processing apparatus 21 is applicable to and produces and the superimposed voice signal of coaural signal, and has and in the 1 essentially identical function of the audio-signal processing apparatus shown in Fig. 2.
This second kind of audio-signal processing apparatus 21 comprises: microphone amplifier 22 is used to amplify the corresponding output signal of song with the chanteur who is collected by the microphone of not expression; And A/D transducer 23, the analog output signal that is used for microphone amplifier 22 carries out the A/D conversion.This second kind of audio-signal processing apparatus 21 also comprises: sound property translation circuit 24, be used for the digital audio signal through the A/D conversion is carried out digital signal processing, produce the signal have with by the different interval of the interval of the corresponding input signal of the chanteur's of microphone collection song; And D/A transducer 25, be used for the output digital audio signal of sound property translation circuit 24 is carried out the D/A conversion, produce simulating signal.This second kind of audio-signal processing apparatus 21 also comprises: combiner circuit 26 is used for and will has and be synthesized by the simulating signal of the different interval of the interval of the chanteur's of D/A transducer 25 output song and the output signal of microphone amplifier 22.
If, in a second embodiment, as need as a plurality of chanteurs with different intervals in the same sound effective value and identical song of singing a first song, as long as provide a plurality of sound property translation circuits 24 in parallel with microphone amplifier and utilize combiner circuit 26 to synthesize the output of each translation circuit just enough.If the output of combiner circuit 26 is suitable for being fed back to by the amplifier that the backfeed loop utilization has a device that changes enlargement factor the input end of A/D transducer 23, only utilize sound property translation circuit 24 just can realize and the similar same sound effective value of utilizing a plurality of sound mapping characteristic translation circuits to be realized, therefore, simplified circuit structure.The interval in unison with corresponding to the output signal of the sound of collecting from microphone amplifier 22 that is in harmonious proportion by combiner circuit 26 can be below or above the interval from the output signal of microphone amplifier 22.Certainly, chanteur's the song if a plurality of sound is added to can adopt the interval of the same acoustic sound of the interval that is higher or lower than chanteur's song.
In first kind of audio-signal processing apparatus 1 in first embodiment, utilize the combiner circuit 5b in the sound generating apparatus 5 in unison will utilize the output signal of A/D transducer 4 microphone amplifiers 3 to carry out the digital signal that the A/D conversion obtains, the digital signal that has different intervals with the interval with the sound of being collected by microphone 2 that is produced by sound property translation circuit 5a is synthetic.On the contrary, owing to do not provide in the coaural signal generator of audio-signal processing apparatus 21 in the present embodiment with the synthetic combiner circuit of digital signal processing mode.Circuit structure can more be simplified than the sound generating apparatus in unison in preceding first embodiment.
In first kind of audio-signal processing apparatus 1 in first embodiment, superimposed from the digital signal of the digital signal of A/D transducer 4 and different intervals, digital signal that frequency characteristic changes, or with superimposed, so that be provided to combiner circuit 13 through D/A transducer 7 with the corresponding digital signal of echo signal.Consequently, the signal that is postponed by digital signal processing by generating means 5 and treating apparatus 6 is added on the output signal of microphone amplifier 3 by combiner circuit 13.In the audio signal processing circuit 21 in a second embodiment, only the signal of sound property conversion utilizes combiner circuit to be added on the output signal of microphone amplifier 22.
Consult Fig. 4, explain the audio-signal processing apparatus 31 of a third embodiment in accordance with the invention.In the audio-signal processing apparatus in third embodiment of the invention, use identical label represent with front first embodiment in components identical, omit in order to simplify for the detailed introduction of these common parts.
The simulating signal that being configured for of audio-signal processing apparatus 1 among first embodiment will utilize 70 pairs in D/A transducer to obtain through the D/A conversion from the digital signal of balanced device echo processor 6 with from the digital signal of balanced device 12 and the output signal of microphone amplifier 3 are by combiner circuit 13 summations.On the other hand, the simulating signal that is configured for utilizing 13 pairs of combiner circuits to utilize 16 pairs of digital signals of D/A transducer to carry out the D/A conversion to obtain of the audio-signal processing apparatus 31 among this 3rd embodiment, the output signal summation of picking out signal and microphone amplifier 3 from the mould of D/A transducer 70 as sound information from balanced device 12.Because the output signal of reproducer 8 utilizes keying circuit 11 and balanced device 12 to change by signal Processing, its interval and frequency characteristic have been changed, and utilize D/A transducer 16 to be transformed to simulating signal as the digital signal that sound information forms, be transported to combiner circuit 13 again, make and to utilize the D/A transducer 70 that has less figure place and low sample frequency than D/A transducer 7 used in the audio-signal processing apparatus of first embodiment.In other words, because it is enough to make the output digital signal of 70 pairs of balanced device echo processors 6 of D/A transducer of the audio-signal processing apparatus among the 3rd embodiment to carry out the D/A conversion, can shorten with the signal processing time of comparing in D/A transducer 70 at first embodiment, therefore, alleviated signal Processing burden in D/A transducer 70.
In this 3rd embodiment, because the output signal of microphone amplifier 3 is delivered directly to combiner circuit 13, as in first embodiment, do not have the danger of the degradation of the output signal that makes microphone amplifier 3, even with chanteur's song and the coaural signal that produces by coaural signal generator 5 and superimposed from the signal through correction of frequency characteristic of balanced device echo processor 6 yet.
Therefore, in the audio-signal processing apparatus 31 among this 3rd embodiment, can adopt than the A/D transducer in the audio-signal processing apparatus 101 as shown in FIG. 1 103,106 and D/A transducer 109 adopt still less figure place and the more cheap output signal that is used for microphone amplifier 3 carry out the A/D transducer 4 of A/D conversion, be used for to the output signal of line amplifier 9 carry out the A/D conversion A/D transducer 10, be used for the D/A transducer 7 of D/A conversion and the D/A transducer 16 that the output of balanced device 12 is carried out the D/A conversion are carried out in the output of balanced device echo processor 6.Certainly, can design the A/D transducer in the audio-signal processing apparatus 31 4,10 lower than the sample frequency of A/D transducer 103.In addition, A/ D transducer 4,10 can be designed to such an extent that compare the figure place that has still less and lower sample frequency with the A/D transducer.This is equally applicable to D/ A transducer 7,16.
In the above among the 3rd embodiment of Tao Luning, the digital audio signal of the interval that the singing voice signals interval with input of utilizing combiner circuit 5b will utilize sound property translation circuit 5a to produce is different is synthetic with the digital audio signal at the input side of sound property translation circuit 5a.In addition, also can adopt circuit structure as shown in Figure 3, wherein only provide the sound property translation circuit that is used for only exporting numeral through the voice signal of interval change with different intervals.
Balanced device echo processor 6 can only be provided with balanced device 6a and echo processing circuit 6c, and is not provided with the combiner circuit 6b that resembles in the above-mentioned first and the 3rd embodiment, 6d.In this case, balanced device echo processor 6 is exportable by balanced device 6a's and sometimes to (as needs) digital audio signal of correction of frequency characteristic, and the digital signal that comprises the echo segment of echo processing.
According to audio-signal processing apparatus of the present invention, owing to utilize combiner circuit that the output signal of microphone amplifier is added on the complementary coaural signal and echo signal, under the situation that does not adopt high performance A/D with big figure place and higher sample frequency or D/A transducer, just can obtain and microphone is exported consistent in fact enough good sound effect.Utilize audio-signal processing apparatus of the present invention, even can not produce owing to adopt the distortion of the chanteur's that dynamic constraints that high performance A/D or D/A transducer also can the factor word signal processors causes song.
Claims (8)
1, a kind of audio-signal processing apparatus comprises:
One signal processor, the simulation singing voice signals that is used for importing is transformed to digital signal and the digital signal through conversion is handled, produces and the superimposed digital signal of default sound property signal,
D/A converter, the digital signal conversion that is used for being produced by signal processor is a simulating signal; And
Mixer is used for the simulating signal of input is mixed mutually with the simulating signal of being exported by described D/A converter.
2, audio-signal processing apparatus as claimed in claim 1 is characterized in that described signal processor comprises the analog/digital converter that is used for the simulating signal of input is transformed to digital signal.
3, audio-signal processing apparatus as claimed in claim 1 is characterized in that described signal processor also comprises a transducer, and the interval change that is used for singing voice signals that will input is the interval of interval lifting preset tones with respect to the singing voice signals of input.
4, audio-signal processing apparatus as claimed in claim 2 is characterized in that described signal processor also comprises echo processor, is used for an echo signal is added to through the digital signal of conversion.
5, audio-signal processing apparatus as claimed in claim 1 is characterized in that also comprising:
One analog/digital converter, the musical composition information signal transformation that is used for input is digital signal;
The output digital signal of described analog/digital converter is provided to described D/A converter.
6, audio-signal processing apparatus as claimed in claim 5 is characterized in that also comprising:
The sound property signal superposition device, the sound property signal that is used for presetting is added to and is used for this digital signal of described analog/digital converter.
7, audio-signal processing apparatus as claimed in claim 1 is characterized in that also comprising:
The musical composition information signal that sound property treating apparatus, the sound property signal that is used for presetting are added to and import, the output of described sound property treating apparatus is provided to described mixing arrangement.
8, audio-signal processing apparatus as claimed in claim 7, it is characterized in that it is the A/D converter of digital signal that described sound property treating apparatus has the musical composition information signal transformation that is used for input, one is used for sound property is added to from the stacking apparatus on the digital signal of described analog/digital converter, and the D/A converter that is used for the output signal from described stacking apparatus is transformed to simulating signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97117177 CN1178964A (en) | 1996-07-08 | 1997-07-08 | Sound signal processor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP178295/96 | 1996-07-08 | ||
| CN 97117177 CN1178964A (en) | 1996-07-08 | 1997-07-08 | Sound signal processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1178964A true CN1178964A (en) | 1998-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97117177 Pending CN1178964A (en) | 1996-07-08 | 1997-07-08 | Sound signal processor |
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| CN (1) | CN1178964A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407021C (en) * | 2003-05-21 | 2008-07-30 | 株式会社半导体能源研究所 | Liquid crystal display device |
| CN104637488A (en) * | 2013-11-07 | 2015-05-20 | 华为终端有限公司 | Sound processing method and terminal device |
| CN107481727A (en) * | 2017-06-23 | 2017-12-15 | 罗时志 | A kind of acoustic signal processing method and system based on the control of electric sound keynote |
-
1997
- 1997-07-08 CN CN 97117177 patent/CN1178964A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407021C (en) * | 2003-05-21 | 2008-07-30 | 株式会社半导体能源研究所 | Liquid crystal display device |
| CN104637488A (en) * | 2013-11-07 | 2015-05-20 | 华为终端有限公司 | Sound processing method and terminal device |
| CN107481727A (en) * | 2017-06-23 | 2017-12-15 | 罗时志 | A kind of acoustic signal processing method and system based on the control of electric sound keynote |
| CN107481727B (en) * | 2017-06-23 | 2020-05-29 | 罗时志 | Audio signal processing method and system based on electric tone pitch control |
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