CN105812919A - Audio frequency multi-power amplifier processing method and audio frequency multi-power amplifier processing device - Google Patents
Audio frequency multi-power amplifier processing method and audio frequency multi-power amplifier processing device Download PDFInfo
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Abstract
The invention discloses an audio frequency multi-power amplifier processing method and an audio frequency multi-power amplifier processing device. The audio frequency multi-power amplifier processing method is characterized in that a decoding module is used for decoding input audio frequency signals, and is used for transmitting the decoded audio frequency signals to an audio frequency frequency division segmentation module; the audio frequency frequency division segmentation module is used for the frequency division processing according to the frequency of the decoded audio frequency signals in order to acquire digital audio frequency signals corresponding to a plurality of frequency bands, and is used for transmitting the digital audio frequency signals to the corresponding independent digital power amplification modules; the digital power amplification modules are used for the power amplification processing and the output of the digital audio frequency signals, and then the playing can be facilitated. The sound effect quality of the electronic device can be further improved.
Description
Technical field
The present invention relates to audio signal processing technique field, particularly relate to method and device that the many power amplifiers of a kind of audio frequency process.
Background technology
At present, MP3, TV and mobile phone etc. can be play in the life that the electronic equipment of sound has extensively entered people, and become the pith of multimedia recreation.For TV, user can carry out TV programme, the viewing of movie program, song appreciation, it might even be possible to carries out video game and TV KTV requesting song.
Traditional TV develops into master with video technique, as long as audio frequency can reach general result of broadcast.But the dog-eat-dog being as TV industry and the popularization applied with the KTV television audio being representative, television manufacturer increasingly payes attention to the lifting of sound of television effect.Television manufacturer is except setting about from aspects such as complete machine layout, audio amplifier designs improving sound of television effect, and power amplifier is also become digital power amplifier by the analog amplifier of early stage gradually, and these improve, and have made the audio quality of TV be greatly improved.But, existing TV power amplifier design, it it is a power amplifier simultaneously processing high frequency audio, intermediate frequency sound and bass, so when using KTV etc. that high bass effect is required higher television audio application, the audio quality of existing TV still has certain limitation, audio quality is not ideal enough, it is impossible to meet the demand of user.
Foregoing is only used for assisting understanding technical scheme, does not represent and admits that foregoing is prior art.
Summary of the invention
Present invention is primarily targeted at and a kind of audio frequency method that many power amplifiers process and device are provided, it is intended to solve to promote further the technical problem of the audio quality of electronic equipment.
For achieving the above object, the present invention provides a kind of audio frequency method that many power amplifiers process, and the method that the many power amplifiers of described audio frequency process comprises the following steps:
The audio signal of input is decoded by decoder module, and decoded audio signal is sent to audio frequency frequency dividing segmentation module；
Described audio frequency frequency dividing segmentation module carries out scaling down processing according to the frequency of decoded audio signal, obtains the digital audio and video signals that multiple frequency range is corresponding, and described digital audio and video signals is sent to corresponding independent digital power amplifier module；
Described digital audio and video signals is carried out power amplifier process and exports by described digital power amplifier module, in order to play out.
Preferably, described audio frequency frequency dividing segmentation module carries out scaling down processing according to the frequency of decoded audio signal, obtains the digital audio and video signals that multiple frequency range is corresponding, and the step that described digital audio and video signals is sent to corresponding independent digital power amplifier module includes:
Judge that decoded audio signal is digital signal or analogue signal；
If analogue signal, decoded audio signal is divided and filters respectively, and the audio signal of filtered each frequency range is converted into described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module；
If digital signal, decoded audio signal is divided and filters respectively, obtain described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module.
Preferably, described audio frequency frequency dividing segmentation module receives, by an integrated circuit built-in audio bus, the decoded audio signal that described decoder module sends, and sends described digital audio and video signals by another integrated circuit built-in audio bus to described digital power amplifier module.
Preferably, described digital audio and video signals is carried out power amplifier process and exports by described digital power amplifier module, in order to the step played out includes:
The audio that the digital audio and video signals of each frequency range is corresponding is initialized；
Judge audio initialize after the digital audio and video signals of each frequency range quiet the need of carrying out；
If so, after then being initialized by audio, the digital audio and video signals of corresponding frequency band carries out quiet and amplifies the digital audio and video signals exporting other frequency ranges, and the digital audio and video signals of all frequency ranges after otherwise being initialized by audio amplifies output.
Preferably, also include: processing module carries out in the process of scaling down processing and digital power amplifier module carries out sending control instruction in the process of power amplifier process in described audio frequency frequency dividing segmentation module respectively, process controlling scaling down processing and power amplifier respectively.
Additionally, for achieving the above object, the present invention also provides for the device that the many power amplifiers of a kind of audio frequency process, and the device that the many power amplifiers of described audio frequency process includes:
Decoder module, for the audio signal of input is decoded, is sent to audio frequency frequency dividing segmentation module by decoded audio signal；
Audio frequency frequency dividing segmentation module, for carrying out scaling down processing according to the frequency of decoded audio signal, obtains the digital audio and video signals that multiple frequency range is corresponding, described digital audio and video signals is sent to corresponding independent digital power amplifier module；
Digital power amplifier module, for carrying out power amplifier process to described digital audio and video signals and exporting, in order to play out.
Preferably, described audio frequency frequency dividing segmentation module includes:
First judging unit, is used for judging that decoded audio signal is digital signal or analogue signal；
First frequency unit, if for analogue signal, decoded audio signal is divided and filters respectively, and the audio signal of filtered each frequency range is converted into described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module；
Second frequency unit, if for digital signal, decoded audio signal being divided and filtered respectively, obtains described digital audio and video signals, is sent to corresponding independent digital power amplifier module by described digital audio and video signals.
Preferably, described audio frequency frequency dividing segmentation module receives, by an integrated circuit built-in audio bus, the decoded audio signal that described decoder module sends, and sends described digital audio and video signals by another integrated circuit built-in audio bus to described digital power amplifier module.
Preferably, described digital power amplifier module includes:
Initialization unit, the audio corresponding for the digital audio and video signals to each frequency range initializes；
Second judging unit, for judge audio initialize after the digital audio and video signals of each frequency range quiet the need of carrying out；
Power amplifier output unit, quiet for if desired carrying out, after then being initialized by audio, the digital audio and video signals of corresponding frequency band carries out quiet and amplifies the digital audio and video signals exporting other frequency ranges, and the digital audio and video signals of all frequency ranges after otherwise being initialized by audio amplifies output.
Preferably, also include processing module, for carrying out in the process of scaling down processing and digital power amplifier module carries out sending control instruction in the process of power amplifier process in described audio frequency frequency dividing segmentation module respectively, process controlling scaling down processing and power amplifier respectively.
The method of the many power amplifier process of a kind of audio frequency of the present invention and device, decoded audio signal is carried out scaling down processing, height according to audio signal frequency is divided into multiple frequency range, the digital audio and video signals of each frequency range uses corresponding independent digital power amplifier module individually to carry out power amplifier process, the treatment effect of the audio signal of different frequency range can be improved, promote audio quality further, for instance high frequency audio and bass treatment effect can be improved, make high bass result of broadcast better.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of method one embodiment that the many power amplifiers of audio frequency of the present invention process；
Fig. 2 is the refinement schematic flow sheet of step S102 in Fig. 1；
Fig. 3 is the refinement schematic flow sheet of step S103 in Fig. 1；
Fig. 4 is the high-level schematic functional block diagram of device one embodiment that the many power amplifiers of audio frequency of the present invention process；
Fig. 5 is the refinement high-level schematic functional block diagram of Fig. 4 sound intermediate frequency frequency dividing segmentation module；
Fig. 6 is the refinement high-level schematic functional block diagram of digital power amplifier module in Fig. 4.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of audio frequency method that many power amplifiers process, and with reference to Fig. 1, in one embodiment, the method that the many power amplifiers of this audio frequency process includes:
Step S101, the audio signal of input is decoded by decoder module, and decoded audio signal is sent to audio frequency frequency dividing segmentation module；
In the present embodiment, original audio signal is input to decoder module, and original audio signal is decoded by decoder module, and decoder module generally arrives and is built in system level chip (System-on-a-Chip, SOC).After decoder module receives original audio signal, under the control of CPU processing module, complete audio decoder.In decoding process, it is necessary to decoding data are cushioned by memory management module.Decoded audio signal is sent to audio frequency frequency dividing segmentation module, so that decoded audio signal is carried out scaling down processing.
In the present embodiment, no matter decoded audio signal is digital signal or analogue signal, all can pass through integrated circuit built-in audio bus (Inter-ICSound, I2S) between decoder module and audio frequency frequency dividing segmentation module and transmit decoded audio signal.
Step S102, described audio frequency frequency dividing segmentation module carries out scaling down processing according to the frequency of decoded audio signal, obtains the digital audio and video signals that multiple frequency range is corresponding, and described digital audio and video signals is sent to corresponding independent digital power amplifier module；
In the present embodiment, audio frequency frequency dividing segmentation module receives the audio signal of the transmission of decoder module, and this audio signal is digital signal or analogue signal.
No matter it is digital signal or analogue signal, decoded audio signal all can be carried out scaling down processing by audio frequency frequency dividing segmentation module, divide according to its signal frequency by decoded audio signal, it is divided into several frequency range, preferably can be divided into high band, Mid Frequency and low-frequency range, it is also possible to audio signal is divided into two sections or more than three sections etc..Then it is filtered processing to the audio signal after frequency dividing, remove the interference signal of the audio signal of each frequency range, such as remove the audio signal of the Mid Frequency in high band audio signal and low-frequency range, the digital audio and video signals corresponding to finally give each frequency range, is then sent to digital audio and video signals digital power amplifier module and carries out power amplifier process.
Step S103, described digital audio and video signals is carried out power amplifier process and exports by described digital power amplifier module, in order to play out.
In the present embodiment, the quantity of digital power amplifier module is be more than or equal to two, the quantity of digital power amplifier module is corresponding or equal with the quantity of the frequency range of above-mentioned digital audio and video signals, namely the digital audio and video signals correspondence of a frequency range inputs to a digital power amplifier module, individual digit power amplifier module individually the digital audio and video signals of a certain frequency range is carried out power amplifier process.Chip circuit in each digital power amplifier module can be the same, simply each digital power amplifier module setting by software, making its audio different, namely the effect of sound is different, for instance the audio of the digital power amplifier module corresponding to the digital audio and video signals of high band is partial to high frequency audio；Or the size adjusting device of each road signal is set so that the sound size of each road output is freely adjustable.
In the present embodiment, the digital audio and video signals of each frequency range is carried out audio Initialize installation by digital power amplifier module, and then the digital audio and video signals after initializing carries out power amplification, and output plays out in playing device such as audio amplifier.
In the present embodiment, carry out in the process of scaling down processing in audio frequency frequency dividing segmentation module, the also control frequency dividing instruction of receiving processing module CPU, so that scaling down processing is controlled, additionally, carrying out in the process of power amplifier process in digital power amplifier module, processing module CPU is sent to control the instruction that power amplifier processes equally respectively, to control power amplifier process.
Compared with prior art, decoded audio signal is carried out scaling down processing by the present embodiment, height according to audio signal frequency is divided into multiple frequency range, the digital audio and video signals of each frequency range uses corresponding independent digital power amplifier module individually to carry out power amplifier process, the treatment effect of the audio signal of different frequency range can be improved, promote audio quality further, for instance high frequency audio and bass treatment effect can be improved, make high bass result of broadcast better.
In a preferred embodiment, as in figure 2 it is shown, on the basis of the embodiment of above-mentioned Fig. 1, above-mentioned steps S102 includes:
Step S1021, it is judged that decoded audio signal is digital signal or analogue signal；
Step S1022, if analogue signal, divides decoded audio signal and filters respectively, and the audio signal of filtered each frequency range is converted into described digital audio and video signals, and described digital audio and video signals is sent to corresponding independent digital power amplifier module；
Step S1023, if digital signal, divides decoded audio signal and filters respectively, obtain described digital audio and video signals, and described digital audio and video signals is sent to corresponding independent digital power amplifier module.
In the present embodiment, audio frequency frequency dividing segmentation module judges that decoded audio signal is digital signal or analogue signal, and digital signal and analogue signal are carried out different scaling down processing.
If analogue signal, to be divided into high band, Mid Frequency and low-frequency range, electronic equipment can pre-define the frequency range of high band, Mid Frequency, low-frequency range, if frequency is high band be more than or equal to 4KHz, frequency is less than 4KHz and be Mid Frequency, frequency be more than or equal to 800Hz be low-frequency range less than 800Hz.
Audio signal for high band, need to arrange intermediate frequency and low frequency filtering, will be less than the audio signal of 4KHz all to filter out, then again the high-frequency audio signal analog digital conversion of this simulation is become digital audio and video signals, so, the digital audio and video signals of high frequency is sent to corresponding independent digital power amplifier module, and this digital power amplifier module is specifically designed to the power amplifier of the digital audio and video signals of high frequency.
Audio signal for Mid Frequency, need to arrange high and low frequency filtering, will be above 4KHz and the audio signal lower than 800Hz all filters out, then again the audio intermediate frequency signal analog digital conversion of this simulation is become digital audio and video signals, so, the digital audio and video signals of intermediate frequency is sent to corresponding independent digital power amplifier module, and this digital power amplifier module is specifically designed to the power amplifier of the digital audio and video signals of intermediate frequency.
Audio signal for low-frequency range, need to arrange high frequency and intermediate frequency filtering, will be above the audio signal of 800Hz all to filter out, then again the low-frequency audio signal analog digital conversion of this simulation is become digital audio and video signals, so, the digital audio and video signals of low frequency is sent to corresponding independent digital power amplifier module, and this digital power amplifier module is specifically designed to the power amplifier of the digital audio and video signals of low frequency.
In the present embodiment, if digital signal, it is also possible to it is preferably divided into high band, Mid Frequency and low-frequency range, then each frequency range is filtered respectively, obtain described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module.
In the present embodiment, between audio frequency frequency dividing segmentation module and digital power amplifier module, transmit digital audio and video signals also by integrated circuit built-in audio bus.
In the present embodiment, by audio signal being divided into high band, Mid Frequency and low-frequency range, before self-demarking code or decoding process, transmittance process, amplification process be all kept completely separate, it is possible to improve the quality of the high pitch in electronic equipment sound, middle pitch and bass simultaneously.
In the present embodiment, the segmentation of high band, Mid Frequency and low-frequency range controls to be operated control by software completely, and performed by digital processing unit digital signal processor DSP, in the scope that device function allows, user can freely set the scope of high band, Mid Frequency and low-frequency range.
In a preferred embodiment, as it is shown on figure 3, on the basis of the embodiment of above-mentioned Fig. 1, above-mentioned steps S103 includes:
Step S1031, initializes the audio that the digital audio and video signals of each frequency range is corresponding；
Step S1032, it is judged that after audio initialization, the digital audio and video signals of each frequency range is quiet the need of carrying out；
Step S1033, after if so, then being initialized by audio, the digital audio and video signals of corresponding frequency band carries out quiet and amplifies the digital audio and video signals exporting other frequency ranges；
Step S1034, if it is not, the digital audio and video signals of all frequency ranges after then being initialized by audio amplifies output.
In the present embodiment, to be divided into high band, Mid Frequency and low-frequency range, the digital audio and video signals power amplifier of these three frequency range is initialized respectively, for the digital power amplifier module of processing and amplifying high frequency audio, be set to audio deflection 4KHz or above high frequency audio；For the digital power amplifier module of processing and amplifying intermediate frequency sound, it is set to audio deflection intermediate frequency sound between 800Hz to 4KHz；For the digital power amplifier module of processing and amplifying high frequency audio, being set to the audio deflection bass less than 800Hz, so far, audio has initialized.
In the present embodiment, after initialization completes, it is judged that after audio initialization, the digital audio and video signals of each frequency range is quiet the need of carrying out, if not needing quiet, just the digital audio and video signals of all frequency ranges is amplified output to playing out in the playing device of audio amplifier, and wait quiet judgement next time；If needing quiet, the digital audio and video signals of corresponding frequency band being carried out silence processing, the digital audio and video signals of other frequency ranges is amplified and exports, and waits quiet judgement next time.
In the present embodiment, the digital power amplifier module of each frequency range can be duplicate chip circuit, but can pass through software, in advance digital power amplifier module is arranged different audios.
In the present embodiment, by audio signal being divided into high band, Mid Frequency and low-frequency range, before self-demarking code or decoding process, transmittance process, amplification process be all kept completely separate, audio arranges and is completely independent, it is possible to improve the quality of the high pitch in electronic equipment sound, middle pitch and bass simultaneously.
The present invention also provides for the device that the many power amplifiers of a kind of audio frequency process, and as shown in Figure 4, in one embodiment, the device that the many power amplifiers of described audio frequency process includes:
Decoder module 101, for the audio signal of input is decoded, is sent to audio frequency frequency dividing segmentation module 102 by decoded audio signal；
In the present embodiment, original audio signal is input to decoder module 101, and original audio signal is decoded by decoder module 101, and decoder module 101 generally arrives and is built in system level chip (System-on-a-Chip, SOC).After decoder module 101 receives original audio signal, under the control of CPU processing module, complete audio decoder.In decoding process, it is necessary to decoding data are cushioned by memory management module.Decoded audio signal is sent to audio frequency frequency dividing segmentation module 102, so that decoded audio signal is carried out scaling down processing.
In the present embodiment, no matter decoded audio signal is digital signal or analogue signal, all can pass through integrated circuit built-in audio bus (Inter-ICSound, I2S) between decoder module 101 and audio frequency frequency dividing segmentation module 102 and transmit decoded audio signal.
Audio frequency frequency dividing segmentation module 102, for carrying out scaling down processing according to the frequency of decoded audio signal, obtains the digital audio and video signals that multiple frequency range is corresponding, described digital audio and video signals is sent to corresponding independent digital power amplifier module 103；
In the present embodiment, audio frequency frequency dividing segmentation module 102 receives the audio signal of the transmission of decoder module 101, and this audio signal is digital signal or analogue signal.
No matter it is digital signal or analogue signal, decoded audio signal all can be carried out scaling down processing by audio frequency frequency dividing segmentation module 102, divide according to its signal frequency by decoded audio signal, it is divided into several frequency range, preferably can be divided into high band, Mid Frequency and low-frequency range, it is also possible to audio signal is divided into two sections or more than three sections etc..Then it is filtered processing to the audio signal after frequency dividing, remove the interference signal of the audio signal of each frequency range, such as remove the audio signal of the Mid Frequency in high band audio signal and low-frequency range, the digital audio and video signals corresponding to finally give each frequency range, is then sent to digital audio and video signals digital power amplifier module 103 and carries out power amplifier process.
Digital power amplifier module 103, for carrying out power amplifier process to described digital audio and video signals and exporting, in order to play out.
In the present embodiment, the quantity of digital power amplifier module 103 is be more than or equal to two, the quantity of digital power amplifier module 103 is corresponding or equal with the quantity of the frequency range of above-mentioned digital audio and video signals, namely the digital audio and video signals correspondence input of a frequency range is to a digital power amplifier module 103, individual digit power amplifier module 103 individually the digital audio and video signals of a certain frequency range is carried out power amplifier process.Chip circuit in each digital power amplifier module 103 can be the same, simply each digital power amplifier module 103 setting by software so that it is audio is different, and namely the effect of sound is different.The audio of such as, digital power amplifier module corresponding to the digital audio and video signals of high band is partial to high frequency audio；Or the size adjusting device of each road signal is set so that the sound size of each road output is freely adjustable.
In the present embodiment, the digital audio and video signals of each frequency range is carried out audio Initialize installation by digital power amplifier module 103, and then the digital audio and video signals after initializing carries out power amplification, and output plays out in playing device such as audio amplifier.
In the present embodiment, carry out in the process of scaling down processing in audio frequency frequency dividing segmentation module 102, the also control frequency dividing instruction of receiving processing module CPU, so that scaling down processing is controlled, additionally, carrying out in the process of power amplifier process in digital power amplifier module 103, processing module CPU is sent to control the instruction that power amplifier processes equally respectively, to control power amplifier process.
In a preferred embodiment, as it is shown in figure 5, on the basis of the embodiment of above-mentioned Fig. 4, described audio frequency frequency dividing segmentation module 102 includes:
First judging unit 1021, is used for judging that decoded audio signal is digital signal or analogue signal；
First frequency unit 1022, if for analogue signal, decoded audio signal is divided and filters respectively, and the audio signal of filtered each frequency range is converted into described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module 103；
Second frequency unit 1023, if for digital signal, decoded audio signal being divided and filtered respectively, obtains described digital audio and video signals, is sent to corresponding independent digital power amplifier module 103 by described digital audio and video signals.
In the present embodiment, audio frequency frequency dividing segmentation module 102 judges that decoded audio signal is digital signal or analogue signal, and digital signal and analogue signal are carried out different scaling down processing.
If analogue signal, to be divided into high band, Mid Frequency and low-frequency range, electronic equipment can pre-define the frequency range of high band, Mid Frequency, low-frequency range, if frequency is high band be more than or equal to 4KHz, frequency is less than 4KHz and be Mid Frequency, frequency be more than or equal to 800Hz be low-frequency range less than 800Hz.
Audio signal for high band, need to arrange intermediate frequency and low frequency filtering, will be less than the audio signal of 4KHz all to filter out, then again the high-frequency audio signal analog digital conversion of this simulation is become digital audio and video signals, so, the digital audio and video signals of high frequency is sent to corresponding independent digital power amplifier module 103, and this digital power amplifier module 103 is specifically designed to the power amplifier of the digital audio and video signals of high frequency.
Audio signal for Mid Frequency, need to arrange high and low frequency filtering, will be above 4KHz and the audio signal lower than 800Hz all filters out, then again the audio intermediate frequency signal analog digital conversion of this simulation is become digital audio and video signals, so, the digital audio and video signals of intermediate frequency is sent to corresponding independent digital power amplifier module 103, and this digital power amplifier module 103 is specifically designed to the power amplifier of the digital audio and video signals of intermediate frequency.
Audio signal for low-frequency range, need to arrange high frequency and intermediate frequency filtering, will be above the audio signal of 800Hz all to filter out, then again the low-frequency audio signal analog digital conversion of this simulation is become digital audio and video signals, so, the digital audio and video signals of low frequency is sent to corresponding independent digital power amplifier module 103, and this digital power amplifier module 103 is specifically designed to the power amplifier of the digital audio and video signals of low frequency.
In the present embodiment, if digital signal, it is also possible to it is preferably divided into high band, Mid Frequency and low-frequency range, then each frequency range is filtered respectively, obtain described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module 103.
In the present embodiment, between audio frequency frequency dividing segmentation module 102 and digital power amplifier module 103, transmit digital audio and video signals also by integrated circuit built-in audio bus.
In the present embodiment, by audio signal being divided into high band, Mid Frequency and low-frequency range, before self-demarking code or decoding process, transmittance process, amplification process be all kept completely separate, it is possible to improve the quality of the high pitch in electronic equipment sound, middle pitch and bass simultaneously.
In the present embodiment, the segmentation of high band, Mid Frequency and low-frequency range controls to be operated control by software completely, and performed by digital processing unit digital signal processor DSP, in the scope that device function allows, user can freely set the scope of high band, Mid Frequency and low-frequency range.
In a preferred embodiment, as shown in Figure 6, on the basis of the embodiment of above-mentioned Fig. 4, described digital power amplifier module 103 includes:
Initialization unit 1031, the audio corresponding for the digital audio and video signals to each frequency range initializes；
Second judging unit 1032, for judge audio initialize after the digital audio and video signals of each frequency range quiet the need of carrying out；
Power amplifier output unit 1033, quiet for if desired carrying out, after then being initialized by audio, the digital audio and video signals of corresponding frequency band carries out quiet and amplifies the digital audio and video signals exporting other frequency ranges, and the digital audio and video signals of all frequency ranges after otherwise being initialized by audio amplifies output.
In the present embodiment, to be divided into high band, Mid Frequency and low-frequency range, the digital audio and video signals power amplifier of these three frequency range is initialized respectively, for the digital power amplifier module 103 of processing and amplifying high frequency audio, be set to audio deflection 4KHz or above high frequency audio；For the digital power amplifier module 103 of processing and amplifying intermediate frequency sound, it is set to audio deflection intermediate frequency sound between 800Hz to 4KHz；For the digital power amplifier module 103 of processing and amplifying high frequency audio, being set to the audio deflection bass less than 800Hz, so far, audio has initialized.
In the present embodiment, after initialization completes, it is judged that after audio initialization, the digital audio and video signals of each frequency range is quiet the need of carrying out, if not needing quiet, just the digital audio and video signals of all frequency ranges is amplified output to playing out in the playing device of audio amplifier, and wait quiet judgement next time；If needing quiet, the digital audio and video signals of corresponding frequency band being carried out silence processing, the digital audio and video signals of other frequency ranges is amplified and exports, and waits quiet judgement next time.
In the present embodiment, the digital power amplifier module 103 of each frequency range can be duplicate chip circuit, but can pass through software, in advance digital power amplifier module 103 is arranged different audios.
In the present embodiment, by audio signal being divided into high band, Mid Frequency and low-frequency range, before self-demarking code or decoding process, transmittance process, amplification process be all kept completely separate, audio arranges and is completely independent, it is possible to improve the quality of the high pitch in electronic equipment sound, middle pitch and bass simultaneously.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (10)
1. the method that the many power amplifiers of audio frequency process, it is characterised in that the method that the many power amplifiers of described audio frequency process comprises the following steps:
The audio signal of input is decoded by decoder module, and decoded audio signal is sent to audio frequency frequency dividing segmentation module；
Described audio frequency frequency dividing segmentation module carries out scaling down processing according to the frequency of decoded audio signal, obtains the digital audio and video signals that multiple frequency range is corresponding, and described digital audio and video signals is sent to corresponding independent digital power amplifier module；
Described digital audio and video signals is carried out power amplifier process and exports by described digital power amplifier module, in order to play out.
2. the method that the many power amplifiers of audio frequency as claimed in claim 1 process, it is characterized in that, described audio frequency frequency dividing segmentation module carries out scaling down processing according to the frequency of decoded audio signal, obtaining the digital audio and video signals that multiple frequency range is corresponding, the step that described digital audio and video signals is sent to corresponding independent digital power amplifier module includes:
Judge that decoded audio signal is digital signal or analogue signal；
If analogue signal, decoded audio signal is divided and filters respectively, and the audio signal of filtered each frequency range is converted into described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module；
If digital signal, decoded audio signal is divided and filters respectively, obtain described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module.
3. the method that the many power amplifiers of audio frequency as claimed in claim 1 or 2 process, it is characterized in that, described audio frequency frequency dividing segmentation module receives, by an integrated circuit built-in audio bus, the decoded audio signal that described decoder module sends, and sends described digital audio and video signals by another integrated circuit built-in audio bus to described digital power amplifier module.
4. the method that the many power amplifiers of audio frequency as claimed in claim 1 process, it is characterised in that described digital audio and video signals is carried out power amplifier process and exports by described digital power amplifier module, in order to the step played out includes:
The audio that the digital audio and video signals of each frequency range is corresponding is initialized；
Judge audio initialize after the digital audio and video signals of each frequency range quiet the need of carrying out；
If so, after then being initialized by audio, the digital audio and video signals of corresponding frequency band carries out quiet and amplifies the digital audio and video signals exporting other frequency ranges, and the digital audio and video signals of all frequency ranges after otherwise being initialized by audio amplifies output.
5. the method that the many power amplifiers of audio frequency as claimed in claim 1 process, it is characterized in that, also include: processing module carries out in the process of scaling down processing and digital power amplifier module carries out sending control instruction in the process of power amplifier process in described audio frequency frequency dividing segmentation module respectively, process controlling scaling down processing and power amplifier respectively.
6. the device that the many power amplifiers of audio frequency process, it is characterised in that the device that the many power amplifiers of described audio frequency process includes:
Decoder module, for the audio signal of input is decoded, is sent to audio frequency frequency dividing segmentation module by decoded audio signal；
Audio frequency frequency dividing segmentation module, for carrying out scaling down processing according to the frequency of decoded audio signal, obtains the digital audio and video signals that multiple frequency range is corresponding, described digital audio and video signals is sent to corresponding independent digital power amplifier module；
Digital power amplifier module, for carrying out power amplifier process to described digital audio and video signals and exporting, in order to play out.
7. the device that the many power amplifiers of audio frequency as claimed in claim 6 process, it is characterised in that described audio frequency frequency dividing segmentation module includes:
First judging unit, is used for judging that decoded audio signal is digital signal or analogue signal；
First frequency unit, if for analogue signal, decoded audio signal is divided and filters respectively, and the audio signal of filtered each frequency range is converted into described digital audio and video signals, described digital audio and video signals is sent to corresponding independent digital power amplifier module；
Second frequency unit, if for digital signal, decoded audio signal being divided and filtered respectively, obtains described digital audio and video signals, is sent to corresponding independent digital power amplifier module by described digital audio and video signals.
8. the device that the many power amplifiers of audio frequency as claimed in claims 6 or 7 process, it is characterized in that, described audio frequency frequency dividing segmentation module receives, by an integrated circuit built-in audio bus, the decoded audio signal that described decoder module sends, and sends described digital audio and video signals by another integrated circuit built-in audio bus to described digital power amplifier module.
9. the device that the many power amplifiers of audio frequency as claimed in claim 6 process, it is characterised in that described digital power amplifier module includes:
Initialization unit, the audio corresponding for the digital audio and video signals to each frequency range initializes；
Second judging unit, for judge audio initialize after the digital audio and video signals of each frequency range quiet the need of carrying out；
Power amplifier output unit, quiet for if desired carrying out, after then being initialized by audio, the digital audio and video signals of corresponding frequency band carries out quiet and amplifies the digital audio and video signals exporting other frequency ranges, and the digital audio and video signals of all frequency ranges after otherwise being initialized by audio amplifies output.
10. the device that the many power amplifiers of audio frequency as claimed in claim 6 process, it is characterized in that, also include processing module, for carrying out in the process of scaling down processing and digital power amplifier module carries out sending control instruction in the process of power amplifier process in described audio frequency frequency dividing segmentation module respectively, process controlling scaling down processing and power amplifier respectively.
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