CN103606373B - A kind of audio frequency method of reducing, device and terminal unit - Google Patents
A kind of audio frequency method of reducing, device and terminal unit Download PDFInfo
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- CN103606373B CN103606373B CN201310626178.2A CN201310626178A CN103606373B CN 103606373 B CN103606373 B CN 103606373B CN 201310626178 A CN201310626178 A CN 201310626178A CN 103606373 B CN103606373 B CN 103606373B
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Abstract
It relates to a kind of audio frequency method of reducing, described method includes: analog audio source is sampled respectively with multiple sample frequency, it is thus achieved that multiple quantification impulse samples; The plurality of quantification impulse sample is merged process, generates the quantification impulse sample after merging; It is reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging. Analog audio source is sampled respectively with multiple higher sample frequency, obtains quantification impulse sample according to higher sample frequency and restore higher-quality audio frequency, improve the tonequality of output audio frequency. The disclosure also discloses the device for realizing said method and terminal unit.
Description
Technical field
The disclosure is directed to audio signal processing technique field, especially with respect to a kind of audio frequency method of reducing, device and terminal unit.
Background technology
Along with developing rapidly of consumer electronics product, the especially explosive growth of smart terminal product, smart terminal product can meet most of amusement function that people are daily, for instance, see a film, listen music, internet video live broadcasting and online shopping etc. The pursuit that can play out high quality audio when people play music for intelligent terminal never stopped, and tonequality when usual intelligent terminal plays music also cannot with the comparing of CD disc, and music tonequality is in urgent need to be improved.
Summary of the invention
For overcoming correlation technique Problems existing, the disclosure provides a kind of audio frequency method of reducing, device and terminal unit, merges, to restore the audio output signal higher than CD disc audio quality after audio-source is sampled respectively with multiple sample frequency.
On the one hand, present disclose provides a kind of audio frequency method of reducing, described method includes:
Analog audio source is sampled respectively with multiple sample frequency, it is thus achieved that multiple quantification impulse samples;
The plurality of quantification impulse sample is merged process, generates the quantification impulse sample after merging;
It is reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging.
Analog audio source is sampled respectively with multiple higher sample frequency, the multiple quantification impulse samples obtained are merged, analogue audio frequency output signal is restored according to the quantification impulse sample after merging, obtain quantification impulse sample according to higher sample frequency and restore higher-quality audio frequency, improve the tonequality of output audio frequency.
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, including:
Judge that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point;
If the multiple pulse amplitudes at same time point are identical, then retain described pulse amplitude;
Pulse amplitude according to each time point retained generates the quantification impulse sample after merging.
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, also include:
If the multiple pulse amplitudes at same time point are different, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
In the quantification impulse sample generate multiple repairing weld, the pulse amplitude identical at same time point is retained, and different pulse amplitudes averages to eliminate sampling noiset or quantization error.
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, also include:
If the pulse amplitude at same time point is different, then judge the plurality of quantification impulse sample is whether multiple pulse amplitudes of same time point contain the pulse amplitude that value is zero;
If not containing the pulse amplitude that value is zero, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
If being the pulse amplitude of zero containing value, then judge that whether the number of the pulse amplitude that value is zero is beyond predetermined threshold value;
If the number of the pulse amplitude that value is zero exceeds predetermined threshold value, it is determined that the pulse amplitude of described time point is zero;
If the number of the pulse amplitude that value is zero is without departing from predetermined threshold value, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
If the number containing the pulse amplitude that value is zero and the pulse amplitude that value is zero sometime exceedes predetermined threshold value, then think that the pulse amplitude of this time point is zero, the pulse amplitude that this time point is not zero is caused by sampling noiset or quantization error, is given up.
Described multiple quantification impulse samples are merged process, including: at least two quantification impulse sample in the plurality of quantification impulse sample is merged process. With various ways, the quantification impulse sample of acquisition can be merged into the quantification impulse sample after a final merging.
Described analog audio source is sampled respectively with multiple sample frequency, including: described analog audio source is sampled respectively with the multiple sample frequency more than 44.1KHz. To guarantee the analogue audio frequency output signal restoring tonequality higher than conventional CD.
On the other hand, present disclose provides a kind of audio frequency reduction apparatus, described device includes:
Sampling module, for sampling respectively with multiple sample frequency to analog audio source, it is thus achieved that multiple quantification impulse samples;
Merging module, for the plurality of quantification impulse sample being merged process, generating the quantification impulse sample after merging;
Recovery module, for being reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging.
Described merging module includes:
First judging unit, for judging that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point;
First processing unit, for when when multiple pulse amplitudes of same time point are identical, retaining described pulse amplitude;
Generate unit, generate the quantification impulse sample after merging for the pulse amplitude according to each time point retained.
Described merging module also includes:
Second processing unit, for when multiple pulse amplitude difference at same time point, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
Described merging module also includes:
Second judging unit, for when pulse amplitude difference at same time point, it is judged that the plurality of quantification impulse sample is whether multiple pulse amplitudes of same time point contain the pulse amplitude that value is zero;
3rd processing unit, for when not containing the pulse amplitude that value is zero, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
3rd judging unit, for when containing the pulse amplitude that value is zero, it is judged that value is whether the number of the pulse amplitude of zero is beyond predetermined threshold value;
Fourth processing unit, for when the number of the pulse amplitude that value is zero is beyond predetermined threshold value, it is determined that the pulse amplitude of described time point is zero;
5th processing unit, for when the number of the pulse amplitude that value is zero is without departing from predetermined threshold value, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
On the other hand, present disclose provides a kind of terminal unit, terminal unit includes memorizer, and one or more than one program, one of them or more than one program are stored in memorizer, and are configured to be performed one or more than one program package containing the instruction for carrying out following operation by one or more than one processor:
Analog audio source is sampled respectively with multiple sample frequency, it is thus achieved that multiple quantification impulse samples;
The plurality of quantification impulse sample is merged process, generates the quantification impulse sample after merging;
It is reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing further understanding of the disclosure, constitutes the part of the application, is not intended that restriction of this disclosure. In the accompanying drawings:
Fig. 1 is the exemplary process diagram of a kind of audio frequency method of reducing that disclosure embodiment one provides;
Fig. 2 (a) is the illustrative diagram of analogue audio frequency source sampling in disclosure embodiment;
Fig. 2 (b) is the illustrative diagram of the quantification impulse sample obtained after sampling in disclosure embodiment;
Fig. 3 is the exemplary process diagram of a kind of method merging multiple quantification impulse sample in disclosure embodiment;
Fig. 4 (a) is the illustrative diagram of another quantification impulse sample obtained after sampling in disclosure embodiment;
Fig. 4 (b) is the illustrative diagram of the quantification impulse sample obtained after being merged by the quantification impulse sample shown in Fig. 2 (b) and Fig. 4 (a) in disclosure embodiment;
Fig. 5 is the exemplary process diagram of the another kind of method merging multiple quantification impulse samples in disclosure embodiment;
Fig. 6 is the illustrative diagram that in disclosure embodiment, quantification impulse sample after merging according to Fig. 4 (b) restores simulated audio signal;
Fig. 7 is the example arrangement schematic diagram of a kind of audio frequency reduction apparatus that disclosure embodiment one provides;
Fig. 8 is a kind of example arrangement schematic diagram merging module in disclosure embodiment;
Fig. 9 is the another kind of example arrangement schematic diagram merging module in disclosure embodiment;
Figure 10 is the example arrangement schematic diagram of a kind of terminal unit that disclosure embodiment provides.
By above-mentioned accompanying drawing, it has been shown that the embodiment that the disclosure is clear and definite, will there is more detailed description hereinafter. These accompanying drawings and word describe the scope being not intended to be limited disclosure design by any mode, but are the concept that those skilled in the art illustrate the disclosure by reference specific embodiment.
Detailed description of the invention
For making the purpose of the disclosure, technical scheme and advantage clearly understand, below in conjunction with embodiment and accompanying drawing, the disclosure is described in further details. At this, the exemplary embodiment of the disclosure and explanation thereof are used for explaining the disclosure, but are not intended as restriction of this disclosure.
Disclosure embodiment provides a kind of audio frequency method of reducing, device and terminal unit, below in conjunction with accompanying drawing, the disclosure is described in detail.
In disclosure embodiment one, as it is shown in figure 1, a kind of audio frequency method of reducing includes:
In step S101, analog audio source being sampled respectively with multiple sample frequency, it is thus achieved that multiple quantification impulse samples, the method for the present embodiment is in terminal unit.
Terminal unit plays out higher-quality audio frequency, it is necessary to the original audio analogue signal of output carries out the sampling of higher frequency as analog audio source. Sample frequency is more high, and the audio frequency restored is more true more natural. Such as, the audio quality that the audio quality that 22KHz sample frequency restores restores significantly better than 11KHz sample frequency. Therefore, more better analogue audio frequency output signal than original audio source quality to obtain, the frequency that analog audio source is sampled is higher than the sample frequency of this analog audio source itself.
In order to restore truer more natural audio frequency, respectively analog audio source being sampled with multiple sample frequency, multiple sample frequency is above the sample frequency of this analog audio source itself. The analog audio source of Time Continuous is become time discrete, amplitude continuous print sampled signal by sampling process. Sampled signal is carried out quantification treatment again, time discrete, amplitude continuous print sampled signal are become the quantification impulse signal that time discrete, amplitude are discrete. As shown in Figure 2 (a) shows, analog audio source was once sampled every a sampling period, the sampled value of each sampled point is represented with limited level, obtains the quantized value of each sampled point sampled value, according to the quantification impulse sample of quantized value composition such as shown in Fig. 2 (b). After analog audio source is sampled with multiple sample frequency, multiple quantification impulse samples. The pulse width of each quantification impulse sample is identical with the time width in corresponding sampling period.
In another embodiment of the disclosure, described analog audio source is sampled respectively with the multiple sample frequency more than 44.1KHz. Conventional CD disc sample frequency is 44.1KHz, and in order to ensure restoring higher-quality audio output signal, the frequency that analog audio source is sampled all is higher than the sample frequency 44.1KHz of conventional CD.
In step s 102, multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging.
The multiple quantification impulse samples obtained in step S101 are merged, namely determines the pulse amplitude of each time point, generate the quantification impulse sample after merging according to the pulse amplitude of each time point finally determined.
Determine that the pulse amplitude of each time point can be accomplished in several ways. During in the disclosure, another is implemented, as it is shown on figure 3, multiple quantification impulse samples merge process, the process that realizes generating the quantification impulse sample after merging includes:
In step S301, it is judged that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point, if the multiple pulse amplitudes at same time point are identical, then perform step S302; If the multiple pulse amplitudes at same time point differ, then perform step S303.
In step s 302, described pulse amplitude is retained.
In step S303, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
In step s 304, the quantification impulse sample after merging is generated according to the pulse amplitude of each time point retained.
Below in conjunction with Fig. 4, for two quantification impulse samples are merged process illustrate. Fig. 4 (a) is the quantification impulse sample obtained after same analog audio source being sampled and quantified with the sample frequency more than Fig. 2 (a) a times.Being merged by quantification impulse sample shown in Fig. 2 (b) and Fig. 4 (a), within the 0-Ts/2 time period, the pulse amplitude in Fig. 4 (a) is identical with Fig. 2 (b), then retain the pulse amplitude in this time period. Within the Ts/2-Ts time period, the pulse amplitude in Fig. 4 (a) is different from Fig. 2 (b), then take the meansigma methods of the two pulse amplitude, using the meansigma methods of two pulse amplitudes as the pulse amplitude in the Ts/2-Ts time period. Within the Ts-3Ts/2 time period, the pulse amplitude in Fig. 4 (a) is identical with Fig. 2 (b), then retain the pulse amplitude in this time period. Within the 3Ts/2-2Ts time period, the pulse amplitude in Fig. 4 (a) is different from Fig. 2 (b), then take the meansigma methods of the two pulse amplitude, using the meansigma methods of two pulse amplitudes as the pulse amplitude in the 3Ts/2-2Ts time period. The pulse amplitude of other times section also does same process, is not repeated explanation at this. The quantification impulse sample that quantification impulse sample shown in Fig. 2 (b) and Fig. 4 (a) obtains after merging is as shown in Figure 4 (b). The quantification impulse sample obtained after merging is merged with other quantification impulse samples again, until the whole quantization impulse smaples obtained in S101 all carry out above-mentioned merging treatment.
Above-mentioned being merged by two quantification impulse samples is merely illustrative; it is not intended that the restriction to disclosure protection domain; in other embodiments of the disclosure; at least two quantification impulse sample in the plurality of quantification impulse sample can be merged process, until the whole quantized samples obtained in S101 all being merged.
In another embodiment of the disclosure, as it is shown in figure 5, multiple quantification impulse samples merge process, the process that realizes generating the quantification impulse sample after merging includes:
In step S501, it is judged that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point; If the multiple pulse amplitudes at same time point are identical, then perform step S502; If the multiple pulse amplitudes at same time point differ, then perform step S503.
In step S502, retain described pulse amplitude.
In step S503, it is judged that the plurality of quantification impulse sample is whether multiple pulse amplitudes of same time point contain the pulse amplitude that value is zero; If not containing the pulse amplitude that value is zero, then performing step S504, if being the pulse amplitude of zero containing value, then performing step S505.
In step S504, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
In step S505, it is judged that value is whether the number of the pulse amplitude of zero is beyond predetermined threshold value; If the number of the pulse amplitude that value is zero exceeds predetermined threshold value, then perform step S506, if the number of the pulse amplitude that value is zero is without departing from predetermined threshold value, then perform step S507.
In step S506, it is determined that the pulse amplitude of described time point is zero.
In step s 507, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
In step S508, generate the quantification impulse sample after merging according to the pulse amplitude of each time point retained
In this embodiment, when multiple pulse amplitudes of same time point differ, judge whether multiple pulse amplitude contains the pulse amplitude that value is zero, if being the pulse amplitude of zero containing value, then judge whether the number of the pulse amplitude that value is zero exceedes predetermined threshold value, for avoiding the interference being combined result of sampling noiset and quantization error, as long as multiple quantification impulse samples exceed predetermined threshold value in the number that pulse amplitude value is zero of same time point, the pulse amplitude then determining this time point is zero, the pulse amplitude that other values are not zero is caused by sampling noiset or quantization error, should give and give up.Such as, obtain 10 quantification impulse samples and these 10 quantification impulse samples are merged process simultaneously, if the pulse amplitude value at same time point is that zero number is more than 8, the pulse amplitude then determining this time point is zero, and the pulse amplitude that this time point value is not zero is by sampling noiset or that quantization error causes and given up.
In step s 103, it is reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging.
Quantification impulse sample after merging is reduced into analogue audio frequency output signal, generates the waveshape signal of output according to the pulse amplitude of each time point. As shown in Figure 6, the quantification impulse sample after the merging according to Fig. 4 (b) restores analog signal waveform and exports signal as analogue audio frequency.
Disclosure embodiment one, analog audio source is sampled respectively with multiple higher sample frequency, the multiple quantification impulse samples obtained are merged, analogue audio frequency output signal is restored according to the quantification impulse sample after merging, obtain quantification impulse sample according to higher sample frequency and restore higher-quality audio frequency, improve the tonequality of output audio frequency.
Disclosure embodiment provides a kind of audio frequency reduction apparatus corresponding with above-described embodiment, as it is shown in fig. 7, this device includes:
Sampling module 70, for sampling respectively with multiple sample frequency to analog audio source, it is thus achieved that multiple quantification impulse samples;
Merging module 71, for the plurality of quantification impulse sample being merged process, generating the quantification impulse sample after merging;
Recovery module 72, for being reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging.
Wherein, merge module 71 as shown in Figure 8, including:
First judging unit 710, for judging that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point;
First processing unit 711, for when when multiple pulse amplitudes of same time point are identical, retaining described pulse amplitude;
Second processing unit 712, for when multiple pulse amplitude difference at same time point, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
Generate unit 713, generate the quantification impulse sample after merging for the pulse amplitude according to each time point retained.
In another embodiment of the disclosure, this merging module 71 is as it is shown in figure 9, include:
First judging unit 710, for judging that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point;
First processing unit 711, for when when multiple pulse amplitudes of same time point are identical, retaining described pulse amplitude;
Second judging unit 714, for when pulse amplitude difference at same time point, it is judged that the plurality of quantification impulse sample is whether multiple pulse amplitudes of same time point contain the pulse amplitude that value is zero;
3rd processing unit 715, for when not containing the pulse amplitude that value is zero, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
3rd judging unit 716, for when containing the pulse amplitude that value is zero, it is judged that value is whether the number of the pulse amplitude of zero is beyond predetermined threshold value;
Fourth processing unit 717, for when the number of the pulse amplitude that value is zero is beyond predetermined threshold value, it is determined that the pulse amplitude of described time point is zero;
5th processing unit 718, for when the number of the pulse amplitude that value is zero is without departing from predetermined threshold value, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
Generate unit 713, generate the quantification impulse sample after merging for the pulse amplitude according to each time point retained.
Figure 10 is terminal unit in disclosure embodiment (can be requesting party's terminal or associated terminal) structural representation. Referring to Figure 10, this terminal may be used for the audio frequency method of reducing implementing to provide in above-described embodiment.
Terminal unit 800 can include communication unit 110, include the memorizer 120 of one or more computer-readable recording mediums, input block 130, display unit 140, sensor 150, voicefrequency circuit 160, WIFI(WirelessFidelity, Wireless Fidelity) module 170, include the parts such as processor 180 and power supply 190 of or more than one process core. It will be understood by those skilled in the art that the terminal unit structure shown in figure is not intended that the restriction to terminal unit, it is possible to include ratio and illustrate more or less of parts, or combine some parts, or different parts are arranged. Wherein:
Communication unit 110 can be used for receiving and sending messages or in communication process, the reception of signal and transmission, and this communication unit 110 can be RF(RadioFrequency, radio frequency) circuit, router, modem, etc. network communication equipment. especially, when communication unit 110 is RF circuit, after the downlink information of base station is received, transfer to one or more than one processor 180 processes, it addition, be sent to base station by relating to up data. generally, RF circuit as communication unit includes but not limited to antenna, at least one amplifier, tuner, one or more agitator, subscriber identity module (SIM) card, transceiver, bonder, LNA(LowNoiseAmplifier, low-noise amplifier), duplexer etc. communicate additionally, communication unit 110 can also pass through radio communication with network and other equipment. described radio communication can use arbitrary communication standard or agreement, include but not limited to GSM(GlobalSystemofMobilecommunication, global system for mobile communications), GPRS(GeneralPacketRadioService, general packet radio service), CDMA(CodeDivisionMultipleAccess, CDMA), WCDMA(WidebandCodeDivisionMultipleAccess, WCDMA), LTE(LongTermEvolution, Long Term Evolution), Email, SMS(ShortMessagingService, Short Message Service) etc. memorizer 120 can be used for storing software program and module, and processor 180 is stored in software program and the module of memorizer 120 by running, thus performing the application of various function and data process. memorizer 120 can mainly include storage program area and storage data field, and wherein, storage program area can store the application program (such as sound-playing function, image player function etc.) etc. needed for operating system, at least one function, storage data field can store the data (such as voice data, phone directory etc.) etc. that the use according to terminal unit 800 creates. additionally, memorizer 120 can include high-speed random access memory, it is also possible to include nonvolatile memory, for instance at least one disk memory, flush memory device or other volatile solid-state parts.Correspondingly, memorizer 120 can also include Memory Controller, to provide processor 180 and the input block 130 access to memorizer 120.
Input block 130 can be used for receiving numeral or the character information of input, and produce the keyboard relevant with user setup and function control, mouse, action bars, optics or trace ball signal and input. Preferably, input block 130 can include Touch sensitive surface 131 and other input equipments 132. Touch sensitive surface 131, also referred to as touching display screen or Trackpad, user can be collected thereon or neighbouring touch operation (such as user uses any applicable object such as finger, stylus or adnexa operation on Touch sensitive surface 131 or near Touch sensitive surface 131), and drive corresponding connecting device according to formula set in advance. Optionally, Touch sensitive surface 131 can include touch detecting apparatus and two parts of touch controller. Wherein, the touch orientation of touch detecting apparatus detection user, and detect the signal that touch operation brings, transmit a signal to touch controller; Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, then gives processor 180, and can receive order that processor 180 sends and be performed. Furthermore, it is possible to adopt the polytypes such as resistance-type, condenser type, infrared ray and surface acoustic wave to realize Touch sensitive surface 131. Except Touch sensitive surface 131, input block 130 can also include other input equipments 132. Preferably, other input equipments 132 can include but not limited to one or more in physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc.
Display unit 140 can be used for showing the various graphical user interface of information or the information being supplied to user and the terminal unit 800 inputted by user, and these graphical user interface can be made up of figure, text, icon, video and its combination in any. Display unit 140 can include display floater 141, optionally, it is possible to adopt LCD(LiquidCrystalDisplay, liquid crystal display), OLED(OrganicLight-EmittingDiode, Organic Light Emitting Diode) etc. form configure display floater 141. Further, Touch sensitive surface 131 can cover display floater 141, when Touch sensitive surface 131 detects thereon or after neighbouring touch operation, send processor 180 to determine the type of touch event, on display floater 141, provide corresponding visual output with preprocessor 180 according to the type of touch event. Although in Fig. 10, Touch sensitive surface 131 and display floater 141 are to realize input and input function as two independent parts, but in some embodiments it is possible to by integrated to Touch sensitive surface 131 and display floater 141 and realize input and output function.
Terminal unit 800 may also include at least one sensor 150, such as optical sensor, motion sensor and other sensors. Optical sensor can include ambient light sensor and proximity transducer, wherein, ambient light sensor can regulate the brightness of display floater 141 according to the light and shade of ambient light, and proximity transducer when terminal unit 800 moves in one's ear, can cut out display floater 141 and/or backlight. One as motion sensor, Gravity accelerometer can detect the size of the acceleration that (is generally three axles) in all directions, can detect that the size of gravity and direction time static, can be used for identifying the application (such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating) of mobile phone attitude, Vibration identification correlation function (such as pedometer, knock) etc.;Other sensors such as the gyroscope that can also configure as terminal unit 800, barometer, drimeter, thermometer, infrared ray sensor, do not repeat them here.
Voicefrequency circuit 160, speaker 161, microphone 162 can provide the audio interface between user and terminal unit 800. Voicefrequency circuit 160 can by receive voice data conversion after the signal of telecommunication, be transferred to speaker 161, by speaker 161 be converted to acoustical signal output; On the other hand, the acoustical signal of collection is converted to the signal of telecommunication by microphone 162, voice data is converted to after being received by voicefrequency circuit 160, after again voice data output processor 180 being processed, through RF circuit 110 to be sent to such as another terminal unit, or voice data is exported to memorizer 120 to process further. Voicefrequency circuit 160 is also possible that earphone jack, to provide the communication of peripheral hardware earphone and terminal unit 800.
In order to realize radio communication, this terminal unit can being configured with wireless communication unit 170, this wireless communication unit 170 can be WIFI module. WIFI belongs to short range wireless transmission technology, and terminal unit 800 can help user to send and receive e-mail by wireless communication unit 170, browse webpage and access streaming video etc., and it has provided the user wireless broadband internet and has accessed. Although there is shown wireless communication unit 170, but it is understood that, it is also not belonging to must be configured into of terminal unit 800, completely can as needed in do not change invention essence scope in and omit.
Processor 180 is the control centre of terminal unit 800, utilize various interface and the various piece of the whole mobile phone of connection, it is stored in the software program in memorizer 120 and/or module by running or performing, and call the data being stored in memorizer 120, perform the various functions of terminal unit 800 and process data, thus mobile phone is carried out integral monitoring. Optionally, processor 180 can include one or more process core; Preferably, processor 180 can integrated application processor and modem processor, wherein, application processor mainly processes operating system, user interface and application program etc., and modem processor mainly processes radio communication. It is understood that above-mentioned modem processor can not also be integrated in processor 180.
Terminal unit 800 also includes the power supply 190(such as battery powered to all parts), preferably, it is logically contiguous with processor 180 that power supply can pass through power-supply management system, realizes the functions such as management charging, electric discharge and power managed thereby through power-supply management system. Power supply 190 can also include one or more direct current or alternating current power supply, recharging system, power failure detection circuit, power supply changeover device or the random component such as inverter, power supply status indicator.
Although not shown, terminal unit 800 can also include photographic head, bluetooth module etc., does not repeat them here. In an embodiment of the disclosure, terminal unit also includes memorizer, and one or more than one program, one of them or more than one program are stored in memorizer, and be configured to by one or more than one processor perform one or more than one program package containing for carry out disclosure embodiment offer to give an order:
Analog audio source is sampled respectively with multiple sample frequency, it is thus achieved that multiple quantification impulse samples;
The plurality of quantification impulse sample is merged process, generates the quantification impulse sample after merging;
It is reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging.
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, including:
Judge that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point;
If the multiple pulse amplitudes at same time point are identical, then retain described pulse amplitude;
Pulse amplitude according to each time point retained generates the quantification impulse sample after merging.
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, also include:
If the multiple pulse amplitudes at same time point are different, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, also include:
If the pulse amplitude at same time point is different, then judge the plurality of quantification impulse sample is whether multiple pulse amplitudes of same time point contain the pulse amplitude that value is zero;
If not containing the pulse amplitude that value is zero, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
If being the pulse amplitude of zero containing value, then judge that whether the number of the pulse amplitude that value is zero is beyond predetermined threshold value;
If the number of the pulse amplitude that value is zero exceeds predetermined threshold value, it is determined that the pulse amplitude of described time point is zero;
If the number of the pulse amplitude that value is zero is without departing from predetermined threshold value, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
Described multiple quantification impulse samples are merged process, including:
At least two quantification impulse sample in the plurality of quantification impulse sample is merged process.
Described analog audio source is sampled respectively with multiple sample frequency, including:
Described analog audio source is sampled respectively with the multiple sample frequency more than 44.1KHz.
Additionally, typically, the mobile terminal described in the disclosure can be various hand-held terminal device, for instance mobile phone, personal digital assistant (PDA) etc., therefore the protection domain of the disclosure should not limit as certain certain types of mobile terminal.
Additionally, be also implemented as the computer program performed by CPU according to disclosed method. When this computer program is performed by CPU, perform the above-mentioned functions limited in disclosed method.
Additionally, said method step and system unit can also utilize controller and for storing so that controller realizes the computer readable storage devices realization of the computer program of above-mentioned steps or Elementary Function.
In addition, it should be appreciated that computer readable storage devices as herein described (such as, memorizer) can be volatile memory or nonvolatile memory, or volatile memory and nonvolatile memory can be included. Nonrestrictive as an example, nonvolatile memory can include read only memory (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM), and this RAM can serve as external cache. Nonrestrictive as an example, RAM can obtain in a variety of forms, such as synchronous random access memory (DRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate SDRAM (DDRSDRAM), enhancing SDRAM (ESDRAM), synchronization link DRAM (SLDRAM) and direct RambusRAM (DRRAM).The storage device of disclosed aspect is intended to include but not limited to the memorizer of these and other suitable type.
Those skilled in the art will also understand is that, may be implemented as electronic hardware, computer software or both combinations in conjunction with the various illustrative logical blocks described by disclosure herein, module, circuit and algorithm steps. In order to clearly demonstrate this interchangeability of hardware and software, to it, general description is carried out with regard to the function of various exemplary components, square, module, circuit and step. This function is implemented as software and is also implemented as hardware and depends on specifically applying and being applied to the design constraint of whole system. Those skilled in the art can realize described function in every way for every kind of concrete application, but this realization decision is not necessarily to be construed as and causes departing from the scope of the present disclosure.
The following parts being designed to perform function described here can be utilized to realize or perform in conjunction with the various illustrative logical blocks described by disclosure herein, module and circuit: any combination of general processor, digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other PLD, discrete gate or transistor logic, discrete nextport hardware component NextPort or these parts. General processor can be microprocessor, but alternatively, processor can be any conventional processors, controller, microcontroller or state machine. Processor can also be implemented as the combination of computing equipment, for instance, DSP and the combination of microprocessor, multi-microprocessor, one or more microprocessor are in conjunction with DSP core or other this configuration any.
Step in conjunction with the method described by disclosure herein or algorithm can be directly contained in the software module performed in hardware, by processor or in combination of the two. Software module may reside within the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, depositor, hard disk, removable dish, CD-ROM or other form any known in the art. Exemplary storage medium is coupled to processor so that processor can read information from this storage medium or write information to this storage medium. In an alternative, described storage medium can be integral to the processor together. Processor and storage medium may reside within ASIC. ASIC may reside within user terminal. In an alternative, processor and storage medium can be resident in the user terminal as discrete assembly.
In one or more exemplary design, described function can realize in hardware, software, firmware or its combination in any. If realized in software, then described function can be stored on a computer-readable medium as one or more instructions or code or transmitted by computer-readable medium. Computer-readable medium includes computer-readable storage medium and communication media, and this communication media includes any medium contributing to that computer program is sent to another position from a position. Storage medium can be able to any usable medium being accessed by a general purpose or special purpose computer. Nonrestrictive as an example, this computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disc memory apparatus, disk storage equipment or other magnetic storage apparatus, or may be used for carrying or required program code that storage form is instruction or data structure and other medium any that can be accessed by universal or special computer or universal or special processor.Additionally, any connection can be properly termed as computer-readable medium. Such as, if use coaxial cable, optical fiber cable, twisted-pair feeder, digital subscriber line (DSL) or such as infrared ray, radio and microwave wireless technology come from website, server or other remote source send software, then the wireless technology of above-mentioned coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared first, radio and microwave is included in the definition of medium. As used herein, disk and CD include compact disk (CD), laser disk, CD, digital versatile disc (DVD), floppy disk, Blu-ray disc, wherein disk generally magnetically reproduces data, and CD reproduces data with utilizing laser optics. The combination of foregoing should also be as including in the scope of computer-readable medium.
Although content disclosed above illustrates the exemplary embodiment of the disclosure, it should be noted that under the premise of the scope of the present disclosure limited without departing substantially from claim, it is possible to it is variously changed and revises. Need to not perform with any particular order according to the open function of claim to a method of embodiment described herein, step and/or action. Although additionally, the element of the disclosure can describe or requirement with individual form, it is also contemplated that multiple, it is odd number unless explicitly limited.
Above-described detailed description of the invention; purpose of this disclosure, technical scheme and beneficial effect have further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the disclosure; it is not used to limit the protection domain of the disclosure; within all spirit in the disclosure and principle, any amendment of making, equivalent replacement, improvement etc., should be included within the protection domain of the disclosure.
Claims (6)
1. an audio frequency method of reducing, it is characterised in that described method includes:
Analog audio source is sampled respectively with multiple sample frequency, it is thus achieved that multiple quantification impulse samples;
The plurality of quantification impulse sample is merged process, generates the quantification impulse sample after merging;
It is reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging;
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, including:
Judge that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point;
If the multiple pulse amplitudes at same time point are identical, then retain described pulse amplitude;
Pulse amplitude according to each time point retained generates the quantification impulse sample after merging;
Described multiple quantification impulse samples are merged process, generate the quantification impulse sample after merging, also include:
If the multiple pulse amplitudes at same time point are different, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
2. the method for claim 1, it is characterised in that described multiple quantification impulse samples merge process, generates the quantification impulse sample after merging, also includes:
If the pulse amplitude at same time point is different, then judge the plurality of quantification impulse sample is whether multiple pulse amplitudes of same time point contain the pulse amplitude that value is zero;
If not containing the pulse amplitude that value is zero, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
If being the pulse amplitude of zero containing value, then judge that whether the number of the pulse amplitude that value is zero is beyond predetermined threshold value;
If the number of the pulse amplitude that value is zero exceeds predetermined threshold value, it is determined that the pulse amplitude of described time point is zero;
If the number of the pulse amplitude that value is zero is without departing from predetermined threshold value, then using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
3. the method for claim 1, it is characterised in that described multiple quantification impulse samples are merged process, including:
At least two quantification impulse sample in the plurality of quantification impulse sample is merged process.
4. the method for claim 1, it is characterised in that described analog audio source is sampled respectively with multiple sample frequency, including:
Described analog audio source is sampled respectively with the multiple sample frequency more than 44.1KHz.
5. an audio frequency reduction apparatus, it is characterised in that described device includes:
Sampling module, for sampling respectively with multiple sample frequency to analog audio source, it is thus achieved that multiple quantification impulse samples;
Merging module, for the plurality of quantification impulse sample being merged process, generating the quantification impulse sample after merging;
Recovery module, for being reduced into analogue audio frequency output signal according to the quantification impulse sample after described merging;
Described merging module includes:
First judging unit, for judging that whether the plurality of quantification impulse sample is identical at multiple pulse amplitudes of same time point;
First processing unit, for when when multiple pulse amplitudes of same time point are identical, retaining described pulse amplitude;
Generate unit, generate the quantification impulse sample after merging for the pulse amplitude according to each time point retained;
Described merging module also includes:
Second processing unit, for when multiple pulse amplitude difference at same time point, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
6. device as claimed in claim 5, it is characterised in that described merging module also includes:
Second judging unit, for when pulse amplitude difference at same time point, it is judged that the plurality of quantification impulse sample is whether multiple pulse amplitudes of same time point contain the pulse amplitude that value is zero;
3rd processing unit, for when not containing the pulse amplitude that value is zero, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point;
3rd judging unit, for when containing the pulse amplitude that value is zero, it is judged that value is whether the number of the pulse amplitude of zero is beyond predetermined threshold value;
Fourth processing unit, for when the number of the pulse amplitude that value is zero is beyond predetermined threshold value, it is determined that the pulse amplitude of described time point is zero;
5th processing unit, for when the number of the pulse amplitude that value is zero is without departing from predetermined threshold value, using the meansigma methods of multiple pulse amplitudes of the described time point pulse amplitude as described time point.
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| CN109039303B (en) * | 2017-06-12 | 2021-12-24 | 科大国盾量子技术股份有限公司 | Method, device and system for generating pulse voltage signal |
| CN107613134B (en) * | 2017-09-29 | 2021-04-20 | 惠州Tcl移动通信有限公司 | Control method of call volume, mobile terminal and storage medium |
| CN110797038B (en) | 2019-10-30 | 2020-11-06 | 腾讯科技（深圳）有限公司 | Audio processing method and device, computer equipment and storage medium |
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