CN101212830A - Audio extension device in audio system - Google Patents
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- CN101212830A CN101212830A CNA2006101487782A CN200610148778A CN101212830A CN 101212830 A CN101212830 A CN 101212830A CN A2006101487782 A CNA2006101487782 A CN A2006101487782A CN 200610148778 A CN200610148778 A CN 200610148778A CN 101212830 A CN101212830 A CN 101212830A
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Abstract
The invention relates to a sound phase expanding device of an audio system, which comprises that: a part that delays an audio signal of a first sound channel and with more dispersion added; a part that delays the audio signal of the first sound channel, a part which carries out a second band filtering to the delayed audio signal of the first sound channel, a part which carries out a third band filtering to the delayed audio signal of the first sound channel, a first sound channel rear end processing part which adds an audio signal of a second sound channel to the audio signal of the first sound channel that goes through the second band filtering and that outputs the sound-phase expanded audio signal of the first sound channel and a second sound channel rear end processing part which adds the audio signal of the first sound channel that goes through the third band filtering to the audio signal of the first sound channel that produces dispersion and outputs the sound-phase expanded audio signal of the second sound channel. The device receives dual channel sound signal, through expanding the scope of the sound phase that listeners can reach, the listeners can hear the sound within the scope of large space including the outer side and front of heads when using an earphone.
Description
Technical field
The present invention relates to the device of expansion sound phase (sound image) in the audio system, relate in particular to a kind of reception dual track acoustic signal, and by the expansion (expansion) hearer can listen the scope of getting the sound phase, make the hearer when using earphone, in the large space scope that comprises the head outside and front, can both hear the extension device in audio of a kind of audio system of sound.
Background technology
When two ears are not listened by time effects to get from acoustic signal that a sound source is sent, the signal that two ears are heard respectively merges by the hearing organ in the head, people can feel the sound that sound sources such as tooth are sent, and it is had an impression (image), a this impression to two sound that ear is heard is called as sound phase (soundimage).
Various sound that exist for place and the sound of hearing by loud speaker etc., a left side/right acoustic signal that directly arrives two ears just exists the difference of the time of advent and sound size etc.This left side/right acoustic signal with each species diversity merges in the mankind's hearing organ, the mankind judge all places of abstract space mutually by perceiving this sound, if judging sound thus, the hearer transmits from which direction, can judge which position and have sound source, so, when the performance acoustics, this speech of sound source that does not use actual physics to exist, and use the perceived sound of hearer this speech mutually.Especially when multi-channel loudspeaker that use to hide actual sound source or earphone were listened to acoustic signal, this conception of species was practical more.This is because when the sound directly hearing nature at nature and produced, the sound that the mankind are felt is almost consistent with the sound source of reality.For example, if the left side of two-way speaker/identical acoustic signal of right loudspeaker plays, the hearer also can feel to exist sound phase, this sound to meet the hearer is felt in the positive central authorities that do not have loud speaker and has significant abstract sound source.
In general, the best approach of having appreciated music is for directly appreciating the music of being played to the performance place, but, development along with various technology such as music disk manufacturing technologies, directly under the situation at performance scene, can not enjoy and the music performing effect of reaching the spot identical yet, even can enjoy than directly arriving on-the-spot better music effect, therefore, even it is on-the-spot directly not arrive performance, also can enjoy music by audio system playing back music disk.
Moreover, the music content of being recorded can be converted into various forms, and stores in the various storage mediums.Along with the generalization of this technology and small portable audio system, when and where no matter people can both enjoy interesting to listen to music.Add the portable audio system earphone that institute generally uses when playing sound equipment and have very high broadcast performance and can block the effect of ambient sound, thus can help the hearer to focus onto in the music, thus anywhere can both music appreciating.
But when the acoustic signal of using two-channel sterearphone to listen to utilize the normal stereo method to record, sound and is in head inside mutually in wide space with not ing.Promptly, even with the as many instrument playing of concert, utilization is distributed in the acoustic signal that musical instrument stereophony microphone nearby records and makes the music disk, when listening to earphone, also is difficult to realize and be sitting in the same effect of being heard on the on-the-spot seat of concert.
When using two-channel sterearphone to listen to the music, the sound that perceives in order to make uses a variety of methods in the outside wide distribution of head.For example, use the method for special sound pick-up outfit, when playing back music, utilize specific process signal to be handled etc. in when recording.
Wherein, use the method for sound pick-up outfit just to be included in when carrying out the stereophony recording mode of utilizing artificial head (dummy head) to record.Promptly after installing microphone additional on the artificial head two ear external auditory meatus of number of people apperance, carry out binaural recording.Though this mode can be recorded the sound equipment of the very high effect of presence,, be difficult to obtain the sound phase of front position, there is the low shortcoming of being recorded of sound equipment tonequality.
When utilizing signal processing method, after utilizing a plurality of frequency bands that acoustic signal is carried out the bandwidth separation, with each bandwidth settings is different amplitude/phase characteristics, in acoustic signal, add response characteristics identical when extensively distributing sound source with whole bandwidth, this method needs very big amount of calculation, must obtain the coefficient of conductivity of each the correct bandwidth that is equivalent to show Virtual Space (the extensively loud speaker of distribution).Can make quality distortion during acoustic signal as a result in synthetic dual track especially.
Signal processing method comprises the high frequency band inversion mode, and a low bandwidth part left side/right phase place is identical, is a left side/right phase reversal more than it.Feeling of being expanded is insufficient, but has the sensation of nature.
In addition, also have and make it and the opposite method of a left side/right acoustic signal phase place, though have the diffusion sense, when listening to, to a kind of offending sensation of people.
Summary of the invention
The present invention proposes for addressing the above problem just, and its purpose is to provide a kind of extension device in audio of audio system of the sound phase scope of expansion is played in the audio system audio signal.
Another object of the present invention is to provide a kind of input audio signal, after expanding sound phase scope and handling, utilize the extension device in audio of the audio system of dual-channel headphone output.
Another object of the present invention is to provide a kind of use extension device in audio of the present invention, when utilizing earphone to listen the audio frequency signal, by adding the extension device in audio of expanding the audio system of sound phase with identical the feeling of two-way speaker output.
Another object of the present invention is to provide a kind of when listening to the stereo binaural audio signal of recording with earphone, it is treated to and tin identical sensation of loud speaker, when utilizing existing earphone to export, near the sound of the inner positive position of head is expanded the extension device in audio of the audio system in the outside to the end mutually.
To achieve these goals, the extension device in audio of audio system of the present invention is characterised in that, comprises following components: the proliferation part that adds the diffusion sense in the audio signal of each sound channel; The cross-talk of forcing to add cross-talk between the sound channel of audio signal generates parts; Carry out addition, the back-end processing parts of the line output of going forward side by side with adding the audio signal of diffusion sense and the audio signal of adding cross-talk.
In addition, to achieve these goals, extension device in audio of the present invention is characterised in that, comprises following components: the audio signal generation of the 1st sound channel is delayed, and add the parts of diffusion sense; In the 1st channel audio signal, generate the parts of virtual cross-talk composition; With the audio signal addition of the 1st sound channel cross-talk composition that generates and the 1st sound channel that adds the diffusion sense, the 1st sound channel back-end processing parts that the sound of the 1st channel audio signal is expanded mutually; With the audio signal addition of the 1st sound channel cross-talk composition that generates and the 2nd sound channel that adds the diffusion sense, the 2nd sound channel back-end processing parts that the sound of the 2nd channel audio signal is expanded mutually.
In addition, to achieve these goals, extension device in audio of the present invention is characterised in that, comprises following components: the audio signal generation of the 1st sound channel is delayed, produce the parts of diffusion sense; Make the audio signal of the 1st sound channel produce the parts of delaying; Above-mentioned the 1st channel audio signal of being delayed is carried out the parts that the 2nd passband filters; Above-mentioned the 1st channel audio signal of being delayed is carried out the parts that the 3rd passband filters; The audio signal addition of the 1st sound channel of filtering, thereby the 1st sound channel back-end processing parts of the 1st channel audio signal that the output sound is expanded mutually with the 2nd channel audio signal with through the 2nd passband; To spread the 1st channel audio signal addition of feeling through the 1st channel audio signal and generation that the 3rd passband filters, thus the 2nd sound channel back-end processing parts of the 2nd channel audio signal that the output sound is expanded mutually.
Effect of the present invention:
As mentioned above, the extension device in audio of audio system of the present invention provides the device that the sound phase scope of institute's perception can be enlarged processing, make the hearer in comprising the head outside and positive large space scope, can both hear sound especially, thereby can enjoy the acoustics that sound has been expanded mutually.
The present invention constitutes simple in structure, in employed audio systems such as portable terminal computer, at low amount of calculation and use memory, and also can enjoy the effect that sound is expanded mutually in the environment that requires to handle in real time.Simultaneously, utilize extension device in audio of the present invention, give a kind of sensation that can both hear the better effects acoustic signal in any environment of hearer.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the assembly pie graph of extension device in audio of the present invention;
Fig. 2 is the assembly pie graph that is applicable to extension device in audio the 1st embodiment of the present invention;
Fig. 3 is the assembly pie graph that is applicable to extension device in audio the 2nd embodiment of the present invention;
Fig. 4 is the assembly pie graph that is applicable to extension device in audio the 3rd embodiment of the present invention.
The symbol description of major part in the accompanying drawing:
110: the 1 sound channel dispersers 120: cross-talk generating apparatus
140: the 2 sound channel dispersers of 130: the 1 sound channel reinforcing devices
150: the 2 sound channel reinforcing devices 160: back-end processing device
Embodiment
Below, with reference to the accompanying drawings, the embodiment of the extension device in audio of audio system of the present invention is elaborated.
Fig. 1 is the extension device in audio embodiment of audio system of the present invention.Extension device in audio of the present invention comprises with the lower part: the 1st sound channel disperser 110, cross-talk generating apparatus 120, the 1 sound channel reinforcing devices 130, the 2 sound channel dispersers 140, the 2 sound channel reinforcing devices 150, back-end processing device 160.That is, extension device in audio of the present invention is made of following each several part: the part that each sound channel is generated virtual cross-talk; Be connected the part that adds the diffusion sense with delay release; The each several part result is added/subtracts, the part that the result of sound phase extension process is carried out completion.
The delay release that uses in the device of the present invention is with any one sound channel in the dual track, i.e. standard of delaying in the L channel setting that is equivalent to the 1st sound channel, in surplus next sound channel, promptly use delay release, generate the required amount of delaying difference between a left side/right-side signal in right side sound channel one side that is equivalent to the 2nd sound channel.Like this, whole system has just become simply, and amount of calculation has also tailed off.Certainly, in contrast, the standard of delaying that adds the diffusion sense is located at R channel, L channel uses delay release, also can generate the amount of delaying difference required between a left side/right-side signal.If perhaps two sound channels are all established delay release, also can make each sound channel be set to different length of delays.
The 1st sound channel disperser 110 is formed by delay release 111 and amplifier 112.Delay release 111 is to set right channel audio signal xR[n] retardation values (m
2) delay handling for benchmark, and add the diffusion sense.Amplification degree (the α that amplifier 112 is set with respect to the right channel audio signal of being delayed
4) for benchmark coherent signal is amplified.
That is, in the part that adds the diffusion sense, the right side acoustic signal and the left side acoustic signal of process delay release together make asymmetricization of a left side/R channel, thereby have added the diffusion sense.The size of the amount of delaying that is used by adjusting makes the variable-magnitude of diffusion sense.At this moment, though the amount of delaying is big more, the diffusion sense is big more,, if under too big situation, as there being a left side/distinct sensation of right side acoustic signal, so should use the suitable amount of delaying.
In addition, the quilt that sends is earlier delayed signal and is compared with the signal that is not delayed and can become smaller, and in order to address this problem, the amplifier that utilization can be regulated amplification degree conforms to the size of a left side/right-side signal.
In Fig. 1, the audio signal of R channel is delayed and amplified, thereby add the diffusion sense.Utilization is the audio signal of the R channel delayed of benchmark with the L channel, adds the diffusion sense.But, in contrast, the audio signal of L channel is delayed and is amplified, thereby add the diffusion sense.Utilization is the audio signal of the L channel delayed of benchmark with the R channel, adds the diffusion sense.Simultaneously, in the 2nd sound channel disperser 140 delay release is set also, the retardation values of this delay release is different with the retardation values of the delay release of the 1st sound channel disperser 110, also can add the diffusion sense.
Retardation values (the m of delay release 121 to be set
1) be benchmark, to the audio signal xR[n of R channel of input] delay handling.The audio signal of the R channel of being delayed in delay release 121 is transferred to the 2nd pass filter 122 and the 3rd pass filter 124.Through the signal of the 2nd pass filter 122 in amplifier 123 with certain amplification degree (α
2) be exaggerated, through the signal of the 3rd pass filter 124 in amplifier 125 with certain amplification degree (α
3) be exaggerated.
Like this, the part that generates virtual cross-talk is as having and hearing acoustic phase sensation part together with earphone through 2 channel loudspeakers, and utilization generates cross-talk to the bandwidth that the generation cross-talk has influence.In Fig. 1, the audio signal of R channel is delayed, is filtered and amplified, here demonstrate by being added into the audio signal of L channel, the situation that adds cross-talk, but can know that by figure following situation also is fine: the audio signal to L channel is delayed, is filtered and amplifies, and, add cross-talk by being added into the audio signal of R channel.
Back-end processing device 160 comprises adder 161,163 and amplifier 162,164.The output signal of 161 pairs the 1st sound channel dispersers 110 of adder, through the 3rd passband filtration of cross-talk generating apparatus 120 and amplifying signal, filter and amplifying signal carries out add operation through 4 passbands.The amplifier 162 that is connected with the output of adder 161 is with specific amplification degree (β
R) for standard the audio signal of carrying out add operation through adder 161 is amplified, and export the 1st sound channel-right channel audio signal y that sound is expanded mutually
R[n].
The output signal of 163 pairs the 2nd sound channel dispersers 140 of another adder, through the 2nd passband filtration of cross-talk generating apparatus 120 and amplifying signal, filter and amplifying signal carries out add operation through 1 passband.The amplifier 164 that is connected with the output of adder 163 is with specific amplification degree (β
L) for standard the audio signal of carrying out add operation through adder 163 is amplified, and export the 2nd sound channel-left channel audio signal y that sound is expanded mutually
L[n].
Like this, to be equivalent to the back-end processing part of output device, to have a left side in order regulating/sound balance of right side acoustic signal, when adding the diffusion sense, after each signal that is added into cross-talk output lumps together once more, utilize amplifier to handle again with certain adjusting amplification degree.
The 1st sound channel reinforcing device 130 is made up of the 4th pass filter 131 and amplifier 132, and the 2nd sound channel reinforcing device 150 comprises the 1st pass filter 151.
The audio signal x of 131 pairs of R channels of the 4th pass filter of the 1st sound channel reinforcing device 130
R[n] carries out passband and filters, through the right channel audio signal of the 4th passband filtration treatment in amplifier 132 with certain amplification degree (α
5) amplify for standard, and offer the adder 161 of back-end processing device 160, generate the right channel audio signal y that sound is expanded mutually
RThe output signal of [n].The audio signal x of 151 pairs of L channels of the 1st pass filter of the 2nd sound channel reinforcing device 150
L[n] carries out passband filtering, is provided in the adder 163 of back-end processing device 160 through the audio signal of the L channel of the 1st passband filtration treatment, generates the left channel audio signal y that sound is expanded mutually
LThe output signal of [n].
Like this, when sound is expanded mutually, for the bandwidth composition to each sound channel deficiency replenishes, and be provided with the sound channel reinforcing device, the sound channel reinforcing device bandwidth composition that each sound channel is required replenishes perfect, when sound is expanded mutually, replenishes the composition of each sound channel deficiency.
In Fig. 1, the 1st sound channel-R channel is carried out filtration of the 4th passband and amplification, the 2nd sound channel-L channel is carried out the 1st passband to be filtered, but, in contrast, as mentioned above, with R channel when delaying benchmark, also can carry out filtration of the 1st passband and amplification, the 1st sound channel-L channel be carried out the 4th passband filter the 2nd sound channel-R channel.
If put in order, coefficient shown in Figure 1 is respectively applied for following purposes:
m
1: expression is used to generate the coefficient value of the amount of delaying of cross-talk composition.
m
2: expression makes the coefficient value that spreads the variable amount of delaying of sense between a left side/R channel.
α
1: when utilizing the amount of delaying to add the diffusion sense, with m
2, α
4Represent that together left-side signal is reflected the coefficient value of degree.
α
2: when the acoustic signal of utilizing the 2nd passband to be delayed generated the cross-talk composition, expression was by the coefficient value of reflection degree.
α
3: that utilizes the 3rd passband delays acoustic signal when generating the cross-talk composition, and expression is by the coefficient value of reflection degree.
α
4: when adding the diffusion sense, with m
2, α
1Together represent to be delayed the coefficient value that right-side signal is reflected degree.
α
5: be the result of completion extension device in audio, when merging the 4th passband right-side signal, expression is by the coefficient value of reflection degree.
β
L: for generating the left side output signal, expression is exaggerated the coefficient value of degree.
β
R: for generating the right side output signal, expression is exaggerated the coefficient value of degree.
Above-mentioned suitable example to extension device in audio of the present invention is illustrated.
This device also can use in portable audio system with following form.
The first, in portable audio system, utilize the computing capability of baseband chip (base-band chip) processor that system has, sound is expanded the form handled as shown in Figure 2 mutually.
The audio resource that memory 210 reads out is provided for baseband chip 220.221 pairs of audio reproducings of audio player are play, and offer conversion equipment 222, and 223 pairs of audio signals of audio decoder are decoded, and are transferred to extension device in audio 224.Conversion equipment 222 can be converted to the digital signal of input the analog signal line output of going forward side by side, and perhaps the simulated audio signal of input is converted to the digital signal line output of going forward side by side.Extension device in audio 224 has and the as above identical formation of Fig. 1, acoustic signal is carried out sound expand mutually, and provide it to conversion equipment 222, becomes the sound equipment output signal that sound is expanded mutually.
Device provided by the invention is by delaying device and simple lower passband, upper passband filter constitute, so amount of calculation is considerably less, can drive fully so have the computing capability of the conventional portable terminating machine etc. of audio system.If the external command of receiving, the baseband chip processor just receives the audio signal of various forms from memory, and be converted to handle employed digital morphological signal after, carry out sound phase extension process, and be converted to the consequential signal output of the form that conforms to output device again.
The second, utilize form that the common processor such as DSP (co-processor) that have in the portable audio system carry out sound phase extension process as shown in Figure 3.
In this case, common processor 230 also has extension device in audio 224 except that having audio decoder 223, so can carry out extension process mutually to sound.
If the external command of receiving, baseband chip (base-band chip) 220 processors are received audio signal from memory 210 just, and be converted to and handle employed digital morphological signal, perhaps utilize common processor (co-processor) 230, from memory 210, receive the audio signal that is compressed form, and conform to audio modality decode calculate after, utilize common processor (co-processor) 230 to carry out sound phase extension process.After baseband chip (Base-band chip) processor receives the operation result of common processor (co-processor), the consequential signal that is converted into the form that conforms to the output device line output of going forward side by side.
The 3rd, if in portable audio system, do not possess calculation element, perhaps under the very weak situation of computing capability, just use electronic circuit.After the form embodiment of extension device in audio of the present invention with hardware, be installed in the system, with the form of sound phase extension process, it constitutes as shown in Figure 4, is made of memory 210, audio player 221, switching manipulation judgment means 240 and extension device in audio 224 form with hardware.
From memory 210, receive audio resource, the acoustic signal of 221 pairs of inputs of audio player is play, require to carry out the switch that sound is expanded mutually if opened from the outside, just according to this order, make from switching manipulation judgment means (SW=on?) 240 acoustic signals to output formation, behind extension device in audio (circuit) 224, be input to output with the form of consequential signal.
The 4th, in portable audio system, if the 1st identical with the broadcast of handling in real time with the 2nd kind of situation, utilize this device of installing in the system, after baseband chip processor or common processor are handled the input content, after its result stored, when needs, it was also passable to utilize same system or other system to play.
The 5th, after sound phase extension process is carried out to acoustic signal in the audio system outside, sound equipment is as a result play in audio system, thereby being waited, music content supplier also can use this device.If the ordinary individual is with extension device in audio of the present invention is installed in the computer, in softwares such as sound equipment editing machine, make it become a function of this program, also can have sound phase expanded function, perhaps extension device in audio of the present invention is installed in other sound and expands mutually, also can possess sound phase expanded function with in the software.
Right of the present invention is not confined to the embodiment of above-mentioned explanation, but will define according to the claim scope, and those skilled in the art can carry out various change and modification fully in not departing from the claim scope of this invention.Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating purpose of the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (16)
1. the extension device in audio of an audio system is characterized in that comprising following components and constitutes:
The proliferation part that in the audio signal of each sound channel, adds the diffusion sense;
The cross-talk of forcing to add cross-talk between the sound channel of audio signal generates parts;
Carry out addition, the back-end processing parts of the line output of going forward side by side with adding the audio signal of diffusion sense and the audio signal of adding cross-talk.
2. as the extension device in audio of claim item 1 described audio system, it is characterized in that:
Described proliferation part is delayed handling to the audio signal of each sound channel with the numerical value that sets, and adds the diffusion sense in associate audio signal.
3. the extension device in audio of audio system as claimed in claim 1 is characterized in that:
The asymmetric adding diffusion of the audio signal of described proliferation part and each sound channel sense.
4. the extension device in audio of audio system as claimed in claim 1 is characterized in that:
Described proliferation part make the 1st channel audio signal delay size and the 2nd channel audio signal delay vary in size, add diffusion and feel.
5. the extension device in audio of audio system as claimed in claim 1 is characterized in that described proliferation part is made of following each several part:
The parts of the audio signal of each sound channel being delayed according to the numerical value of setting;
To the parts that amplified by the audio signal of being delayed.
6. the extension device in audio of audio system as claimed in claim 1 is characterized in that:
Described cross-talk generating apparatus generates cross-talk in any one channel audio signal in dual track, and it is joined in the remaining sound channel, thereby generates the cross-talk of dual track.
7. the extension device in audio of audio system as claimed in claim 1 is characterized in that described cross-talk generates parts and is made of following each several part:
What audio signal is produced delay delays parts;
According to the parts of special frequency band to being filtered by the audio signal of being delayed;
The amplifier unit that the audio signal that is filtered is amplified.
8. the extension device in audio of audio system as claimed in claim 7 is characterized in that:
Comprise pass filter in the described filter element, pass filter is made up of low pass filter and high pass filter that the audio signal of being delayed is filtered.
9. the extension device in audio of audio system as claimed in claim 8 is characterized in that:
The signal that filters through described passband is added in the remaining sound channel, and another is added in the sound channel of self through the signal that passband filters, and the audio signal of each sound channel is asymmetric.
10. the extension device in audio of audio system as claimed in claim 1 is characterized in that:
Comprise amplifying device in the described back-end processing parts, after carrying out add operation, be used to reconcile the balance of each channel audio signal through each channel audio signal of diffusion and cross-talk.
11. the extension device in audio of audio system as claimed in claim 1 is characterized in that also comprising the bandwidth composition reinforcing device with following function:
The specific bandwidth composition of each channel audio signal is replenished perfect, be used to calculate the output signal of relevant sound channel.
12. the extension device in audio of an audio system is characterized in that comprising following components:
The audio signal generation of the 1st sound channel is delayed, and add the parts of diffusion sense;
In the 1st channel audio signal, generate the parts of virtual cross-talk composition;
With the audio signal addition of the 1st sound channel cross-talk composition that generates and the 1st sound channel that adds the diffusion sense, the 1st sound channel back-end processing parts that the sound of the 1st channel audio signal is expanded mutually;
With the audio signal addition of the 1st sound channel cross-talk composition that generates and the 2nd sound channel that adds the diffusion sense, the 2nd sound channel back-end processing parts that the sound of the 2nd channel audio signal is expanded mutually.
13. the extension device in audio of audio system as claimed in claim 12 is characterized in that also comprising following part:
The audio signal of described the 1st sound channel is carried out the 1st passband filter, and join the 1st interior pass filter of the 1st sound channel back-end processing parts;
Described the 2nd channel audio signal is carried out the 4th passband filter, and join the 4th interior pass filter of the 2nd sound channel back-end processing parts.
14. the extension device in audio of audio system as claimed in claim 12 is characterized in that also comprising following part:
Regulate the parts that described the 2nd channel audio signal is added into diffusion sense back reflection degree;
The 1st channel audio signal cross-talk composition that adjusting is filtered through the 2nd passband reflects the parts of degree in the 2nd channel audio signal;
The 1st channel audio signal cross-talk composition that adjusting is filtered through the 3rd passband is reflected the parts of degree in the 1st sound channel and the 2nd channel audio signal;
The 1st channel audio signal that adjusting is delayed is added into the parts of diffusion sense degree that the back is reflected.
15. the extension device in audio of audio system as claimed in claim 12 is characterized in that also comprising:
Be used to regulate the parts of described the 1st sound channel back-end processing parts and the 2nd sound channel back-end processing parts output balance.
16. the extension device in audio of an audio system is characterized in that comprising following components:
The audio signal of the 1st sound channel is delayed, produce the parts of diffusion sense;
Make the audio signal of the 1st sound channel produce the parts of delaying;
Above-mentioned the 1st channel audio signal of being delayed is carried out the parts that the 2nd passband filters;
Above-mentioned the 1st channel audio signal of being delayed is carried out the parts that the 3rd passband filters;
The audio signal addition of the 1st sound channel of filtering, thereby the 1st sound channel back-end processing parts of the 1st channel audio signal that the output sound is expanded mutually with the 2nd channel audio signal with through the 2nd passband;
To spread the 1st channel audio signal addition of feeling through the 1st channel audio signal and generation that the 3rd passband filters, thus the 2nd sound channel back-end processing parts of the 2nd channel audio signal that the output sound is expanded mutually.
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|---|---|---|---|
| CNA2006101487782A CN101212830A (en) | 2006-12-30 | 2006-12-30 | Audio extension device in audio system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101487782A CN101212830A (en) | 2006-12-30 | 2006-12-30 | Audio extension device in audio system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113347553A (en) * | 2021-05-28 | 2021-09-03 | 西安诺瓦星云科技股份有限公司 | Audio output method, audio output device and multimedia server |
| CN113689810A (en) * | 2020-05-18 | 2021-11-23 | Lg电子株式会社 | Image display apparatus and method thereof |
-
2006
- 2006-12-30 CN CNA2006101487782A patent/CN101212830A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689810A (en) * | 2020-05-18 | 2021-11-23 | Lg电子株式会社 | Image display apparatus and method thereof |
| CN113689810B (en) * | 2020-05-18 | 2023-07-04 | Lg电子株式会社 | Image display apparatus and method thereof |
| CN113347553A (en) * | 2021-05-28 | 2021-09-03 | 西安诺瓦星云科技股份有限公司 | Audio output method, audio output device and multimedia server |
| CN113347553B (en) * | 2021-05-28 | 2023-02-17 | 西安诺瓦星云科技股份有限公司 | Audio output method, audio output device and multimedia server |
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