CN103413554B - The denoising method of DSP time delay adjustment and device - Google Patents
The denoising method of DSP time delay adjustment and device Download PDFInfo
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- CN103413554B CN103413554B CN201310380035.8A CN201310380035A CN103413554B CN 103413554 B CN103413554 B CN 103413554B CN 201310380035 A CN201310380035 A CN 201310380035A CN 103413554 B CN103413554 B CN 103413554B
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Abstract
The invention discloses denoising method and the device of a kind of DSP time delay adjustment, the method comprises: when target delay parameter is not equal to current delay parameter, whether the sampled audio signal point under searching current delay parameter and the sampled audio signal point under target delay parameter satisfy condition: two sample amplitude when reproduced are close, and the product of slope is greater than 0; Be, then target delay parameter assignment to playing audio signal after current delay parameter; No, then continue when not changing current delay parameter to play current audio signals.The present invention after searching out qualified Temporal Sampling point just by target delay parameter amplitude to current delay parameter, then the sound signal under target delay parameter to be exported.During parameter switching, there will not be excessive signal fluctuation, ensure that the smooth connection of front and back two segment signal, therefore, it is possible to realize reducing signal noise and degree of distortion, strengthen the effect of Consumer's Experience.
Description
Technical field
The present invention relates to Audio Signal Processing technical field, be specifically related to denoising method and the device of a kind of DSP time delay adjustment.
Background technology
Along with digitized propelling, Digital audio product is general gradually.Digital delay module has important effect in DSP (Digitalsignalprocess) digital audio and video signals treatment technology, time delay module adds the audio processing equipment that delay time exports again after original sound signal being copied, and sets different delay parameters can control stereo set and produce different effects,sounds time delay module; Digital delay processing module, due to the signal saltus step produced when delay parameter changes, often can produce POP noise or CLICK noise.At present, adopt the method adding smoothing filter when delay parameter changes to avoid the generation of noise more.But the reaction time that the method for this people for a change output level needs is long, and can produce quiet when regulating continuously delay parameter.Represented in FIG: when there is step signal during delay parameter adjustment, the figure on the left side is original audio signal, the figure in centre position is produced step signal, the figure on the right is in theory through the sound signal of step signal modulation, horizontal ordinate orientation representative signal sequential, ordinate orientation representative signal amplitude is the sound signal produced after actually passing step signal modulation in Fig. 2.Certainly, be represent with discrete sampled point form in a digital signal, the line between each discrete point forms signal waveform.Contrasted as can be seen from two width figure, in actual mechanical process, delay parameter change can form inevitable noise when the output of sound signal, has influence on the tonequality of former sound signal.And prior art does not make corresponding effective process, sound signal namely can be made to produce distortion effect, and the experience sense affecting user is subject to.
Summary of the invention
The invention provides denoising method and the device of a kind of DSP time delay adjustment, can solve the problem.
The denoising method of a kind of DSP time delay adjustment that the embodiment of the present invention provides, comprises the steps:
When target delay parameter is not equal to current delay parameter, perform docking detecting step: whether the sampled audio signal point under searching current delay parameter and the sampled audio signal point under target delay parameter satisfy condition: the difference of the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter is within the scope of N, 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, then target delay parameter assignment to playing audio signal after current delay parameter; If do not satisfy condition, then continue when not changing current delay parameter to play current audio signals.
Preferably, condition described in docking detecting step also comprises the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter within the scope of M, 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 described searching current delay parameter and the sampled audio signal point under target delay parameter satisfy condition is: judge the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter successively according to sequential, and each sampled point for sequential before the sampled audio signal point under the current delay parameter satisfied condition still continues to play with current delay parameter.
Based on said method, the embodiment of the present invention additionally provides the denoising device of a kind of DSP time delay adjustment, comprise: for the docking detecting unit started when target delay parameter is not equal to current delay parameter, this docking detecting unit is for finding the sampled audio signal point under current delay parameter and whether the sampled audio signal point under target delay parameter satisfies condition: the difference of the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter is within the scope of N, 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, then target delay parameter assignment to playing audio signal after current delay parameter, if do not satisfy condition, then continue when not changing current delay parameter to play current audio signals.
Preferably, condition described in docking detecting unit also comprises the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter within the scope of M, wherein-0.06V≤M≤0.06V.
Preferably, also comprise in docking detecting unit for find whether the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter satisfy condition by sequence judge module, should be used for judging the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter successively according to sequential by sequence judge module, each sampled point for sequential before the sampled audio signal point under the current delay parameter satisfied condition still continues to play with current delay parameter.
Technique scheme can be found out, because the embodiment of the present invention adopts the mode close to judging, namely 2 points be all close with voltage magnitude under target delay parameter and slope under searching current delay parameter, current delay parameter is not changed immediately when not searching out qualified Temporal Sampling point, but after searching out qualified Temporal Sampling point just by target delay parameter amplitude to current delay parameter, then the sound signal under target delay parameter to be exported.During parameter switching, there will not be excessive signal fluctuation, ensure that the smooth connection of front and back two segment signal, therefore, it is possible to realize reducing signal noise and degree of distortion, strengthen the effect of Consumer's Experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the design sketch that prior art middle ideal state 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, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under 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, comprises the steps.
Step 101: judge whether equal current delay parameter when target delay parameter.In the embodiment of the present invention, target delay parameter and current delay parameter are stored in different address spaces respectively, once needs, current delay parameter is changed, then will the delay parameter of change be needed to be written in the address space for stored target delay parameter, system is read to the data parameters in this target delay parameter address space, described system refers to whole digital audio processing system herein simultaneously.In the embodiment of the present invention, the mode of employing change pointed position realizes the assignment to current delay parameter, certainly, can adopt other modes to change the assignment to current delay parameter in other embodiments.
Be appreciated that, when target delay parameter is equal with current delay parameter, illustrate that target delay parameter does not change, then system is run according to current delay parameter, do not need to do any process, still using the sampled audio signal point under current delay parameter as output.If when target delay parameter is not equal to current delay parameter, then illustrative system needs to change delay parameter, can switch to obtain a response speed faster to delay parameter immediately in existing technology, but system there will be our noise said in the introduction, so, not handoff delay parameter immediately in the embodiment of the present invention, but perform docking detecting step, i.e. step 102.
Step 102: whether the sampled audio signal point under searching current delay parameter and the sampled audio signal point under target delay parameter satisfy condition: the difference of the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter is within the scope of N, 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.
First, in digital audio and video signals processing procedure, sound signal is formed signal waveform in the mode of the discrete distribution of Temporal Sampling point, and the magnitude of voltage of each sequential corresponding to 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, only make the sequential signal of each sampled audio signal point in the diagram for the ease of understanding in the embodiment of the present invention, difference may be there is in reality, but do not affect the realization of technical solution of the present invention.With Fig. 4 sound intermediate frequency signal sampling point D exemplarily, the slope f1 of this sampled audio signal point D is the tangent line crossing this sampled point in its timing waveform, the trend of the overall timing waveform of this point can be known by this slope, and then react the variation relation of this end waveform, the magnitude of voltage of this sampled point D reacts by the distance of this sampled point D distance abscissa axis, 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, sampled audio signal point voltage value under current delay parameter and the sampled audio signal point voltage value under target delay parameter whether close, the difference of the voltage of the sampled audio signal point namely under current delay parameter and the sampled audio signal point under target delay parameter is within the scope of-0.12V ~ 0.12V, this value range is with audio signal amplitude not greatly Data Base plinth, in the audio signal amplitude occasion that other are larger, can expand this scope, to reach adaptability widely.Occurring to further reduce later stage noise, can limit-0.06V≤N≤0.06V further, when can ensure that delay parameter switches, the voltage of two docking signals is more close, to reduce fluctuation further, 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, i.e. f1 × f2 > 0, this condition can ensure that on two sampled points, waveform trend is general consistent, at least there will not be the situation that waveform moves towards contrary, and in order to further ensure that the perfection of front and back two segment signal (sound signal under the sound signal under current delay parameter and target delay parameter) is connected, further restriction two sampled point slope f1, f2 keeps close, namely the angle differed between arctanf1 and arctanf2 is less than 45 °, certainly, optimal conditions are: current delay parameter subaudio frequency signal sampling point and slope f1=f2 equal with the magnitude of voltage of target delay parameter subaudio frequency signal sampling point.Once meet the condition (comprising top condition and non-optimal conditions) in this step, then perform step 103 further.
Certainly, in order to the fluctuation noise brought because signal voltage amplitude is excessive can be reduced further, searching (judgement) condition is also further defined in the embodiment of the present invention, namely condition described in detecting step of docking also comprise the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter voltage within the scope of M, wherein-0.06V≤M≤0.06V.Condition can be found out thus, sampled audio signal point voltage under current delay parameter and target delay parameter subaudio frequency signal sampling point voltage value are all limited to close near 0V, be limited in the embodiment of the present invention in the fluctuation range of 0 ± 0.06V, just in time can meet the needs of sound signal noise decrease, make because the voltage magnitude noise caused that fluctuates reaches minimum, thus one, before and after the best convergence condition (delay parameter switching time) of two segment signals be: the voltage of the sampled audio signal point under current delay parameter and target delay parameter subaudio frequency signal sampling point is all close to 0V and slope f1=f2.
Step 103: target delay parameter assignment to playing audio signal after current delay parameter.
It is the step of delay parameter switching in this step, concrete as described in above-mentioned steps, amendment reading pointer, reading pointer is made to point to the address space at this target delay parameter place, and target delay parameter assignment to current delay parameter, after this, just using target delay parameter as current delay parameter, export the sampled audio signal point under its parameter.
When not searching out two sampled point meeting described condition in a step 102 (delay parameter switching point), then performing step 104, namely continuing when not changing current delay parameter to play current audio signals.Be appreciated that, due to the frequency that the frequency of sound signal can be reacted much larger than human nerve, the inner sound signal play under current delay parameter of this section of blank time (may be the time of a frame signal or the time of a few frame signal) before not searching out the parameter switching point that satisfies condition, can't effects,sound be affected, it also avoid this blank time section and occur muting function and affect for experiencing.
In order to reduce hunting time, promote and find efficiency, finding the step whether the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter satisfy condition described in embodiment of the present invention step 102 is: judge the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter successively according to sequential, each sampled point for sequential before the sampled audio signal point under the current delay parameter satisfied condition still continues to play with current delay parameter.Composition graphs 4, when target delay parameter is different from current delay parameter, according to sequential from front to back (as t1 in Fig. 4, t2, t3, t4 is front and back sequential relationship on the horizontal scale) comparing to the sampled point under the current delay parameter corresponding to same sequential and the sampled point under target delay parameter judges, such as: first the voltage of the sampled point A under the current delay parameter in Fig. 4 corresponding to the first sequential t1 and the sampled point a under target delay parameter and slope are judged, because the magnitude of voltage difference of two sampled points is larger, and slope also differs larger, therefore two sampled points on the first sequential t1 are ineligible, can not as delay parameter switching point, now system does not change the position of pointed, i.e. not handoff delay parameter, but will the sound signal of t1 sequential point as output quantity, continue to judge the sampled audio signal point B under current delay parameter and the sampled audio signal point b under target delay parameter at next sequential point t2 according to sequential simultaneously, although because the magnitude of voltage of sampled point B and sampled point b is more or less the same, but (in figure, the f1 of B point is less than 0 to slope direction difference, the f2 of b point is greater than 0), can not as parameter switching point, while sequential point t2 sound signal is exported, skip to next sequential point t3 and carry out judgement searching, sampled audio signal point C under the current delay parameter of sequential point t3 and the sampled audio signal point c magnitude of voltage under target delay parameter comparatively close to and also slope direction consistent (in figure, the f1 of C point is less than 0, the f2 of c point is less than 0), if the enterprising line delay parameter switching of sequence point at this moment, really can noise decrease, and switching time short (reducing the described spacer section time), but in order to balance switching time and effects,sound in the embodiment of the present invention, therefore certain requirement has also been made to the slope degree of approach of front and back two section audio signal, namely the angle differed between arctanf1 and arctanf2 is less than 45 °, it is more level and smooth so that the linking of front and back two segment signal can be ensured.Thus, the sound signal of C point is continued to export in the embodiment of the present invention, skip to next sequential point t4 simultaneously and carry out judgement searching, the magnitude of voltage of the sampled audio signal point D under the current delay parameter of sequential point t4 as can be seen from Figure and the sampled audio signal point d under target delay parameter is comparatively close, slope direction is consistent, and slope value is also comparatively close, do not indicate the concrete amplitude of each signal sampling point in the drawings, we suppose that the magnitude of voltage of D point is close to 0, and the magnitude of voltage of d point is also close to 0, then meet all conditions in the embodiment of the present invention, the D point of t4 sequential is as best delay parameter switching point, now, the sensing position of amendment pointer, by target delay parameter assignment to current delay parameter, so from t4 sequential then system using the sampled audio signal point under 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 contact place, convergence process is perfect, therefore, noise to be also lowered to ultimate attainment, almost noiselessness completes parameter change, to the lifting of whole effects,sound, there is very large meaning.
Be appreciated that in other embodiments, if lower a little to the requirement of effects,sound, can not require that the magnitude of voltage at parameter switching point place is close to 0.So-called close to 0 in the invention process, refer to the scope near 0, scope is defined as 0 ± 0.06V by the present invention.
Embodiment 2:
Based on the method in above-described embodiment 1, the embodiment of the present invention additionally provides the denoising device of a kind of DSP time delay adjustment, comprise: for the docking detecting unit started when target delay parameter is not equal to current delay parameter, this docking detecting unit is for finding the sampled audio signal point under current delay parameter and whether the sampled audio signal point under target delay parameter satisfies condition: the difference of the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter is within the scope of N, 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, then target delay parameter assignment to playing audio signal after current delay parameter, if do not satisfy condition, then continue when not changing current delay parameter to play current audio signals.
Particularly, condition described in detecting unit of docking also comprises the voltage of two sampled points within the scope of M, wherein-0.06V≤M≤0.06V.
Particularly, also comprise in docking detecting unit for find whether the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter satisfy condition by sequence judge module, should be used for judging the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter successively according to sequential by sequence judge module, each sampled point for sequential before the sampled audio signal point under the current delay parameter satisfied condition still continues to play with current delay parameter.
It should be noted that, the content such as information interaction, implementation between said apparatus and intrasystem each unit, due to the inventive method embodiment based on same design, particular content can see in the inventive method embodiment describe, repeat no more herein.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, storage medium can comprise: ROM (read-only memory) (ROM, ReadOnlyMemory), random access memory (RAM, RandomAccessMemory), disk or CD etc.
The denoising method that a kind of DSP time delay provided the embodiment of the present invention above adjusts and device are described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, 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)
- The denoising method of 1.DSP time delay adjustment, is characterized in that, comprise the steps:When target delay parameter is not equal to current delay parameter, perform docking detecting step: whether the sampled audio signal point under searching current delay parameter and the sampled audio signal point under target delay parameter satisfy condition: the difference of the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter is within the scope of N, 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, then target delay parameter assignment is joined to current delayPlaying audio signal after number; If do not satisfy condition, then continue when not changing current delay parameter to play current audio signals.
- 2. the denoising method of DSP time delay adjustment as claimed in claim 1, it is characterized in that, condition described in docking detecting step also comprises the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter within the scope of M, wherein-0.06V≤M≤0.06V.
- 3. the denoising method of DSP time delay adjustment as claimed in claim 1 or 2, it is characterized in that, the angle differed between arctanf1 and arctanf2 is less than 45 °.
- 4. the denoising method of DSP time delay adjustment as claimed in claim 1 or 2, it is characterized in that, the step whether the sampled audio signal point under described searching current delay parameter and the sampled audio signal point under target delay parameter satisfy condition is: judge the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter successively according to sequential, and each sampled point for sequential before the sampled audio signal point under the current delay parameter satisfied condition still continues to play with current delay parameter.
- The denoising device of 5.DSP time delay adjustment, is characterized in that, comprising:For the docking detecting unit started when target delay parameter is not equal to current delay parameter, this docking detecting unit is for finding the sampled audio signal point under current delay parameter and whether the sampled audio signal point under target delay parameter satisfies condition: the difference of the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter is within the scope of N, 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, then target delay parameter assignment to playing audio signal after current delay parameter; If do not satisfy condition, then continue when not changing current delay parameter to play current audio signals.
- 6. the denoising device of DSP time delay adjustment as claimed in claim 5, it is characterized in that, condition described in docking detecting unit also comprises the voltage of the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter within the scope of M, wherein-0.06V≤M≤0.06V.
- 7. the denoising device of the DSP time delay adjustment as described in claim 5 or 6, it is characterized in that, also comprise in docking detecting unit for find whether the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter satisfy condition by sequence judge module, should be used for judging the sampled audio signal point under current delay parameter and the sampled audio signal point under target delay parameter successively according to sequential by sequence judge module, each sampled point for sequential before the sampled audio signal point under the current delay parameter satisfied condition still continues to play with current delay parameter.
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Citations (4)
| 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 |
| 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 |
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Patent Citations (4)
| 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 |
| 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 |
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