CN103413554A - DSP delay adjustment denoising method and device - Google Patents
DSP delay adjustment denoising method and device Download PDFInfo
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- CN103413554A CN103413554A CN2013103800358A CN201310380035A CN103413554A CN 103413554 A CN103413554 A CN 103413554A CN 2013103800358 A CN2013103800358 A CN 2013103800358A CN 201310380035 A CN201310380035 A CN 201310380035A CN 103413554 A CN103413554 A CN 103413554A
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Abstract
The invention discloses a DSP delay adjustment denoising method and device. The denoising method comprises the steps that when a target delay parameter is not equal to a current delay parameter, whether an audio frequency signal sampling point under the current delay parameter and an audio frequency signal sampling point under the target delay parameter meet conditions is found; the voltages of the two sampling points are close to each other, and the slope product is larger than 0; if on yes judgment, the target delay parameter is assigned to the current delay parameter to play audio signals; if on no judgment, current audio signals are played on the situation where the current delay parameter is not changed. After a time sequence sampling point meeting conditions is found, the target delay parameter is assigned to the current delay parameter, and the audio signal under the target delay parameter is output. When parameters are switched, large signal fluctuation is avoided, and the smooth joint between a front section of signals and a rear section of signals is guaranteed. Thus, the effects of reducing signal noise and distortion degree and enhancing user experience are achieved.
Description
Technical field
The present invention relates to the Audio Signal Processing technical field, be specifically related to denoising method and device that a kind of DSP time delay is adjusted.
Background technology
Along with digitized propelling, Digital audio product is general gradually.The digital delay module is at DSP(Digital signal process) have important effect in the digital audio and video signals treatment technology, time delay module is the audio processing equipment that adds delay time to export again after original sound signal is copied, and time delay module is set to different delay parameters and can control the different effects,sound of stereo set generation; The signal saltus step produced when the digital delay processing module changes due to delay parameter, often can produce POP noise or CLICK noise.At present, adopt the method that adds smoothing filter when delay parameter changes to avoid the generation of noise more.But this people for a change reaction time of needing of the method for output level long, and when regulating delay parameter continuously, can produce quiet.Representedly in Fig. 1 be: when delay parameter step signal occurred while adjusting, the figure on the left side is original audio signal, the figure in centre position is the step signal produced, the figure on the right is the sound signal of modulating through step signal in theory, horizontal ordinate direction indication signal sequence, ordinate direction indication signal amplitude is the sound signal in fact produced after the step signal modulation in Fig. 2.Certainly, in digital signal, be to mean with discrete sampled point form, the line between each discrete point forms signal waveform.By two width figure contrasts, can be found out, in actual mechanical process, delay parameter change meeting forms inevitable noise when the output of sound signal, have influence on the tonequality of former sound signal.And prior art is not made corresponding effective processing, namely can make sound signal produce distortion effect, affect user's experience impression.
Summary of the invention
The invention provides denoising method and device that a kind of DSP time delay is adjusted, can address the above problem.
The denoising method that a kind of DSP time delay that the embodiment of the present invention provides is adjusted, comprise the steps:
When the target delay parameter is not equal to the current delay parameter, carry out the docking detecting step: whether the sampled audio signal point of finding under the current delay parameter satisfies condition with the sampled audio signal point under the target delay parameter: the difference of two sample amplitude when reproduced is in the N scope, wherein-0.12V≤N≤0.12V, and the product of this current delay parameter subaudio frequency signal sampling point slope f1 and target delay parameter subaudio frequency signal sampling point slope f2 is greater than 0; If satisfy condition, target delay parameter assignment to the current delay parameter after playing audio signal; If do not satisfy condition, in the situation that do not change the current delay parameter, continue to play current audio signals.
Preferably, the docking detecting step described in condition also comprise two sampled points voltage in the M scope, wherein-0.06V≤M≤0.06V.
Preferably, the angle differed between arctanf1 and arctanf2 is less than 45 °.
Preferably, the step whether the sampled audio signal point under the sampled audio signal point under described searching current delay parameter and target delay parameter satisfies condition is: according to sequential, successively the sampled audio signal point under the current delay parameter and the sampled audio signal point under the target delay parameter are judged, still with the continuation of current delay parameter, play for each sampled point of sequential before the sampled audio signal point under the current delay parameter that meets described condition.
Based on said method, the denoising device that the embodiment of the present invention also provides a kind of DSP time delay to adjust, comprise: for the docking detecting unit started when the target delay parameter is not equal to the current delay parameter, whether this docking detecting unit satisfies condition with the sampled audio signal point under the target delay parameter for the sampled audio signal point of finding under the current delay parameter: the difference of two sample amplitude when reproduced is in the N scope, wherein-0.12V≤N≤0.12V, and the product of this current delay parameter subaudio frequency signal sampling point slope f1 and target delay parameter subaudio frequency signal sampling point slope f2 is greater than 0, if satisfy condition, target delay parameter assignment to the current delay parameter after playing audio signal, if do not satisfy condition, in the situation that do not change the current delay parameter, continue to play current audio signals.
Preferably, the docking detecting unit described in condition also comprise two sampled points voltage in the M scope, wherein-0.06V≤M≤0.06V.
Preferably, docking also comprises in detecting unit pursues the order judge module be used to what find whether sampled audio signal point and sampled audio signal point under the target delay parameter under the current delay parameter satisfy condition, be somebody's turn to do by the order judge module and be used for successively the sampled audio signal point under the current delay parameter and the sampled audio signal point under the target delay parameter being judged according to sequential, still with the continuation of current delay parameter, play for each sampled point of sequential before the sampled audio signal point under the current delay parameter that meets described condition.
Technique scheme can be found out, due to the embodiment of the present invention, adopt the mode that approaches judgement, namely find under the current delay parameter with the target delay parameter under 2 points that all are close of voltage magnitude and slope, when not searching out qualified Temporal Sampling point, do not change immediately the current delay parameter, but after searching out qualified Temporal Sampling point just by target delay parameter amplitude to the current delay parameter, then the sound signal under the target delay parameter is exported.During parameter switching, not there will be excessive signal fluctuation, the smooth connection of two segment signals before and after having guaranteed, therefore can realize reducing signal noise and degree of distortion, strengthens the effect that the user experiences.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the design sketch that in prior art, perfect condition subaudio frequency signal is modulated through step signal;
Fig. 2 is the design sketch that in prior art, virtual condition subaudio frequency signal is modulated through step signal;
Fig. 3 is the process flow diagram of denoising method in the embodiment of the present invention;
Fig. 4 is the timing waveform of current delay parameter subaudio frequency signal sampling point and target delay parameter subaudio frequency signal sampling point in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making all other embodiment that obtain under the creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
The denoising method that the embodiment of the present invention provides a kind of DSP time delay to adjust, as shown in Figure 3, comprise the steps.
Step 101: judgement is worked as the target delay parameter and whether is equaled the current delay parameter.In the embodiment of the present invention by the target delay parameter from the current delay parameter is stored in respectively different address spaces, in case in the time of need to changing the current delay parameter, will need the delay parameter of changing to be written in the address space for the stored target delay parameter gets final product, the data parameters that simultaneously system is read to this target delay parameter address space gets final product, and described system refers to whole digital audio processing system herein.In the embodiment of the present invention, adopt the mode that changes the pointed position to realize the assignment to the current delay parameter, certainly, can adopt in other embodiments other modes to change the assignment to the current delay parameter.
Be appreciated that, when the target delay parameter equates with the current delay parameter, illustrate that the target delay parameter does not change, system gets final product according to current delay parameter operation, do not need to do any processing, still using sampled audio signal point under the current delay parameter as output.When if the target delay parameter is not equal to the current delay parameter, illustrative system need to change delay parameter, in existing technology, can to delay parameter, switch to obtain a response speed faster immediately, but the noise that system there will be us to say in background technology, so, handoff delay parameter immediately not in the embodiment of the present invention, but carry out docking detecting step, i.e. step 102.
Step 102: whether the sampled audio signal point of finding under the current delay parameter satisfies condition with the sampled audio signal point under the target delay parameter: the difference of two sample amplitude when reproduced is in the N scope, wherein-0.12V≤N≤0.12V, and the product of this current delay parameter subaudio frequency signal sampling point slope f1 and target delay parameter subaudio frequency signal sampling point slope f2 is greater than 0.
At first, in the digital audio and video signals processing procedure, sound signal forms signal waveform in the mode of the discrete distribution of Temporal Sampling point, and the magnitude of voltage of corresponding each sequential of different delayed time parameter subaudio frequency signal is different, as shown in Figure 4, left figure is the timing waveform of current delay parameter subaudio frequency signal sampling point, right figure is the timing waveform of target delay parameter subaudio frequency signal sampling point, be understandable that, in the embodiment of the present invention, only for the ease of understanding, make the sequential signal of each sampled audio signal point in Fig. 4, in reality, may there is difference, but do not affect the realization of technical solution of the present invention.Using Fig. 4 sound intermediate frequency signal sampling point D as example, the slope f1 of this sampled audio signal point D crosses the tangent line of this sampled point in its timing waveform, by this slope, can know the trend of the whole timing waveform of this point, and then react the variation relation of this end waveform, the magnitude of voltage of this sampled point D reacts apart from the distance of abscissa axis with this sampled point D, and the temporal representation of this sampled point in whole sound signal waveform is t4.
Then, the Rule of judgment docked in the embodiment of the present invention has two: one, whether the sampled audio signal point voltage value under the current delay parameter and the sampled audio signal point voltage value under the target delay parameter approach, namely the difference of two sample amplitude when reproduced is in-0.12V～0.12V scope, this value range is with audio signal amplitude Data Base plinth greatly not, in other larger audio signal amplitude occasions, can enlarge this scope, to reach adaptability widely.In order further to reduce the later stage noise, occur, can further limit-0.06V≤N≤0.06V, in the time of can guaranteeing the delay parameter switching, the voltage of two docking signals is more approaching, further to reduce fluctuation, they are two years old, the product of this current delay parameter subaudio frequency signal sampling point slope f1 and target delay parameter subaudio frequency signal sampling point slope f2 is greater than 0, it is f1 * f2>0, this condition can guarantee that on two sampled points, the waveform trend is general consistent, at least not there will be waveform to move towards opposite situation, and in order further to guarantee the perfection linking of front and back two segment signals (sound signal under the sound signal under the current delay parameter and target delay parameter), further limit two sampled point slope f1, f2 keeps approaching, be that the angle differed between arctanf1 and arctanf2 is less than 45 °, certainly, optimal conditions are: current delay parameter subaudio frequency signal sampling point equates and slope f1=f2 with the magnitude of voltage of target delay parameter subaudio frequency signal sampling point.In case meet the condition (comprising top condition and non-top condition) in this step, further perform step 103.
Certainly, in order further to reduce the fluctuation noise brought because the signal voltage amplitude is excessive, in the embodiment of the present invention, also further define searching (judgement) condition, the voltage that the condition described in detecting step of namely docking also comprises two sampled points in the M scope, wherein-0.06V≤M≤0.06V.Condition can be found out thus, sampled audio signal point voltage under the current delay parameter and target delay parameter subaudio frequency signal sampling point voltage value all are limited near near 0V, in the embodiment of the present invention, it is limited in the fluctuation range of 0 ± 0.06V, just in time can meet the needs of sound signal noise decrease, make the noise caused because of the voltage magnitude fluctuation reach minimum, thus one, the best convergence condition (delay parameter switching time) of front and back two segment signals is: the voltage of the sampled audio signal point under the current delay parameter and target delay parameter subaudio frequency signal sampling point is all near 0V and slope f1=f2.
Step 103: target delay parameter assignment to the current delay parameter after playing audio signal.
The step of switching for delay parameter in this step, concrete described in above-mentioned step, revise reading pointer, make reading pointer point to the address space at this target delay parameter place, and target delay parameter assignment to the current delay parameter, after this, just using the target delay parameter as the current delay parameter, export the sampled audio signal point under its parameter.
While in step 102, searching out two sampled point that meets described condition, (delay parameter switching point), do not perform step 104, namely in the situation that do not change the current delay parameter, continues to play current audio signals.Be appreciated that, the frequency that can react much larger than human nerve due to the frequency of sound signal, do not search out eligible parameter switching point before sound signal under the inner broadcasting of this section blank time (may be the time of a frame signal or the time of several frame signals) current delay parameter, can't affect effects,sound, also avoid this blank time section muting function to occur and affect for experiencing.
In order to reduce hunting time, promote and find efficiency, the sampled audio signal point of finding described in embodiment of the present invention step 102 under the current delay parameter with the step whether sampled audio signal point under the target delay parameter satisfies condition is: according to sequential, successively the sampled audio signal point under the current delay parameter and the sampled audio signal point under the target delay parameter are judged, for the sampled audio signal point under the current delay parameter that meets described condition before each sampled point of sequential still with current delay parameter continuation broadcasting.In conjunction with Fig. 4, when the target delay parameter is different from the current delay parameter, according to sequential from front to back (as t1 in Fig. 4, t2, t3, t4 sequential relationship before and after on horizontal ordinate) sampled point to same sequential under corresponding current delay parameter and the sampled point under the target delay parameter judgement of comparing, for example: at first the sampled point A under the corresponding current delay parameter of the first sequential t1 in Fig. 4 and voltage and the slope of the sampled point a under the target delay parameter are judged, because the magnitude of voltage of two sampled points differs larger, and slope also differs larger, therefore two sampled points on the first sequential t1 are ineligible, can not be as the delay parameter switching point, now system does not change the position of pointed, i.e. handoff delay parameter not, but sound signal that will t1 sequential point is as output quantity, continue simultaneously the sampled audio signal point B under the current delay parameter and the sampled audio signal point b under the target delay parameter to be judged at next sequential point t2 according to sequential, because although the magnitude of voltage of sampled point B and sampled point b is more or less the same, (f1 that in figure, B is ordered is less than 0 but slope direction is different, the f2 that b is ordered is greater than 0), can not be as the parameter switching point, when sequential being put to the output of t2 sound signal, skip to next sequential point t3 and judge searching, sampled audio signal point c magnitude of voltage under sampled audio signal point C under the current delay parameter of sequential point t3 and target delay parameter comparatively approach and also slope direction consistent (f1 that in figure, C is ordered is less than 0, the f2 that c is ordered is less than 0), if the enterprising line delay parameter switching of order point at this moment, really can noise decrease, and switching time short (reducing the described spacer section time), but in the embodiment of the present invention for balance switching time and effects,sound, therefore the slope degree of approach to front and back two section audio signals has also been made certain requirement, be that the angle differed between arctanf1 and arctanf2 is less than 45 °, linking with two segment signals before and after can guaranteeing is more level and smooth.Thus, in the embodiment of the present invention, continue the sound signal output that C is ordered, skip to simultaneously next sequential point t4 and judge searching, the magnitude of voltage of sampled audio signal point D under the current delay parameter of sequential point t4 and the sampled audio signal point d under the target delay parameter is comparatively approaching as can be seen from Figure, slope direction is consistent, and slope value is also comparatively approaching, do not indicate in the drawings the concrete amplitude of each signal sampling point, we suppose that magnitude of voltage that D orders is near 0, and the magnitude of voltage that d is ordered is also near 0, met all conditions in the embodiment of the present invention, the D point of t4 sequential is as best delay parameter switching point, now, revise the sensing position of pointer, by target delay parameter assignment to the current delay parameter, from the t4 sequential, start system so and using sampled audio signal point under the target delay parameter as output quantity, as can be seen here, when t4 sequential point carries out parameter switching, almost, segment signal is unchanged at the contact place, the convergence process perfection, therefore, noise also has been lowered to ultimate attainment, almost noiselessness completes parameter change, lifting to whole effects,sound has very large meaning.
Be appreciated that in other embodiments, if low a little to the requirement of effects,sound, can not require that the magnitude of voltage at parameter switching point place is near 0.In the invention process, what is called, near 0, refers near the scope 0, and the present invention is 0 ± 0.06V by circumscription.
Embodiment 2:
Based on the method in above-described embodiment 1, the denoising device that the embodiment of the present invention also provides a kind of DSP time delay to adjust, comprise: for the docking detecting unit started when the target delay parameter is not equal to the current delay parameter, whether this docking detecting unit satisfies condition with the sampled audio signal point under the target delay parameter for the sampled audio signal point of finding under the current delay parameter: the difference of two sample amplitude when reproduced is in the N scope, wherein-0.12V≤N≤0.12V, and the product of this current delay parameter subaudio frequency signal sampling point slope f1 and target delay parameter subaudio frequency signal sampling point slope f2 is greater than 0, if satisfy condition, target delay parameter assignment to the current delay parameter after playing audio signal, if do not satisfy condition, in the situation that do not change the current delay parameter, continue to play current audio signals.
Particularly, the docking detecting unit described in condition also comprise two sampled points voltage in the M scope, wherein-0.06V≤M≤0.06V.
Particularly, docking also comprises in detecting unit pursues the order judge module be used to what find whether sampled audio signal point and sampled audio signal point under the target delay parameter under the current delay parameter satisfy condition, be somebody's turn to do by the order judge module and be used for successively the sampled audio signal point under the current delay parameter and the sampled audio signal point under the target delay parameter being judged according to sequential, still with the continuation of current delay parameter, play for each sampled point of sequential before the sampled audio signal point under the current delay parameter that meets described condition.
It should be noted that, the contents such as the information interaction between said apparatus and intrasystem each unit, implementation, due to the inventive method embodiment based on same design, particular content can, referring to the narration in the inventive method embodiment, repeat no more herein.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is to come the hardware that instruction is relevant to complete by program, this program can be stored in a computer-readable recording medium, storage medium can comprise: ROM (read-only memory) (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), disk or CD etc.
Denoising method and the device of above a kind of DSP time delay adjustment that the embodiment of the present invention is provided are described in detail, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just be used to helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1.DSP the denoising method that time delay is adjusted, is characterized in that, comprises the steps:
When the target delay parameter is not equal to the current delay parameter, carry out the docking detecting step: whether the sampled audio signal point of finding under the current delay parameter satisfies condition with the sampled audio signal point under the target delay parameter: the difference of two sample amplitude when reproduced is in the N scope, wherein-0.12V≤N≤0.12V, and the product of this current delay parameter subaudio frequency signal sampling point slope f1 and target delay parameter subaudio frequency signal sampling point slope f2 is greater than 0; If satisfy condition, target delay parameter assignment to the current delay parameter after playing audio signal; If do not satisfy condition, in the situation that do not change the current delay parameter, continue to play current audio signals.
2. the denoising method adjusted of DSP time delay as claimed in claim 1, is characterized in that, the voltage that described in the docking detecting step, condition also comprises two sampled points in the M scope, wherein-0.06V≤M≤0.06V.
3. the denoising method of DSP time delay adjustment as claimed in claim 1 or 2, is characterized in that, the angle differed between arctanf1 and arctanf2 is less than 45 °.
4. the denoising method adjusted of DSP time delay as claimed in claim 1 or 2, it is characterized in that, the step whether the sampled audio signal point under the sampled audio signal point under described searching current delay parameter and target delay parameter satisfies condition is: according to sequential, successively the sampled audio signal point under the current delay parameter and the sampled audio signal point under the target delay parameter are judged, still with the continuation of current delay parameter, play for each sampled point of sequential before the sampled audio signal point under the current delay parameter that meets described condition.
5.DSP the denoising device that time delay is adjusted, is characterized in that, comprising:
For the docking detecting unit started when the target delay parameter is not equal to the current delay parameter, whether this docking detecting unit satisfies condition with the sampled audio signal point under the target delay parameter for the sampled audio signal point of finding under the current delay parameter: the difference of two sample amplitude when reproduced is in the N scope, wherein-0.12V≤N≤0.12V, and the product of this current delay parameter subaudio frequency signal sampling point slope f1 and target delay parameter subaudio frequency signal sampling point slope f2 is greater than 0; If satisfy condition, target delay parameter assignment to the current delay parameter after playing audio signal; If do not satisfy condition, in the situation that do not change the current delay parameter, continue to play current audio signals.
6. the denoising device adjusted of DSP time delay as claimed in claim 5, is characterized in that, the voltage that described in the docking detecting unit, condition also comprises two sampled points in the M scope, wherein-0.06V≤M≤0.06V.
7. the denoising device adjusted of as described as claim 5 or 6 DSP time delay, it is characterized in that, docking also comprises in detecting unit pursues the order judge module be used to what find whether sampled audio signal point and sampled audio signal point under the target delay parameter under the current delay parameter satisfy condition, should be by the order judge module for according to sequential, successively the sampled audio signal point under the current delay parameter and the sampled audio signal point under the target delay parameter being judged, each sampled point for sequential before the sampled audio signal point under the current delay parameter that meets described condition still continues to play with the current delay parameter.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111568215A (en) * | 2020-02-28 | 2020-08-25 | 佛山市云米电器科技有限公司 | Water dispenser control method, water dispenser and computer readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242553A (en) * | 1998-03-24 | 2000-01-26 | 松下电器产业株式会社 | Speech detection system for noisy conditions |
| US6167133A (en) * | 1997-04-02 | 2000-12-26 | At&T Corporation | Echo detection, tracking, cancellation and noise fill in real time in a communication system |
| US20010016020A1 (en) * | 1999-04-12 | 2001-08-23 | Harald Gustafsson | System and method for dual microphone signal noise reduction using spectral subtraction |
| CN101853666A (en) * | 2009-03-30 | 2010-10-06 | 华为技术有限公司 | Speech enhancement method and device |
| CN102111697A (en) * | 2009-12-28 | 2011-06-29 | 歌尔声学股份有限公司 | Method and device for controlling noise reduction of microphone array |
-
2013
- 2013-08-27 CN CN201310380035.8A patent/CN103413554B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6167133A (en) * | 1997-04-02 | 2000-12-26 | At&T Corporation | Echo detection, tracking, cancellation and noise fill in real time in a communication system |
| CN1242553A (en) * | 1998-03-24 | 2000-01-26 | 松下电器产业株式会社 | Speech detection system for noisy conditions |
| US20010016020A1 (en) * | 1999-04-12 | 2001-08-23 | Harald Gustafsson | System and method for dual microphone signal noise reduction using spectral subtraction |
| CN101853666A (en) * | 2009-03-30 | 2010-10-06 | 华为技术有限公司 | Speech enhancement method and device |
| CN102111697A (en) * | 2009-12-28 | 2011-06-29 | 歌尔声学股份有限公司 | Method and device for controlling noise reduction of microphone array |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111568215A (en) * | 2020-02-28 | 2020-08-25 | 佛山市云米电器科技有限公司 | Water dispenser control method, water dispenser and computer readable storage medium |
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Effective date of registration: 20200623 Address after: 518000 512 B block, Shenzhen software industrial base, Nanshan District Road, Nanshan District, Shenzhen, Guangdong Patentee after: DIGISYNTHETIC AUDIOVISUAL (SHENZHEN) Co.,Ltd. Address before: 510663 room 7, No. 701, 1st Street, science Avenue, Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee before: GUANGZHOU DINGYI ELECTRONICS Co.,Ltd. |