CN103377676B - Audio system and audio-frequency processing method - Google Patents
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Abstract
The invention provides a kind of audio system and audio-frequency processing method.This audio system comprises CPU (central processing unit), digital signal processor and coding decoder.Wherein, digital signal processor connects CPU (central processing unit), in order to auxiliary centre processing unit processes sound signal.Coding decoder is linking number word signal processor, in order to coding and the decoding of auxiliary centre processing unit processes audio files.Digital signal processor is the signal transacting demand receiving CPU (central processing unit) output, and the data transmission channel between conducting CPU (central processing unit) according to this and coding decoder, to transmit data.
Description
Technical field
The invention relates to a kind of audio system and audio-frequency processing method, and relate to a kind of audio system and the audio-frequency processing method of integrating audio components characteristic especially.
Background technology
The hand-held board device led due to American apple (Apple) company causes liking of consumers in general, many international PC, the large factory of smart mobile phone in succession drop into and imitate, wherein processor and System on Chip/SoC factory such as Intel (Intel), high pass (Qualcomm), brightness reach the CPU (central processing unit) (CentralProcessingUnit, CPU) that the companies such as (Nvidia), Texas Instrument (TI) and ultra micro (AMD) develop double-core and four cores.But the audio system that these CPU (central processing unit) provide is integrated all to apply for Speech processing, echo suppression, anti-noise process, audio effect processing and speech recognition etc. provides optimized design.
In hand-held action device, the panel computer in non-apple camp is because cannot develop integrated CPU (central processing unit) and peripheral element, therefore device inner space is caused to be subject to the impact of electronic component and mechanism member layout, the performance that the characteristic of overall audio system comprises speaker system and microphone system is usually left in the basket, and causes the complaint of consumer.
For example, Fig. 1 illustrates the Organization Chart of existing audio system, and Fig. 2 illustrates the Organization Chart of another kind of existing audio system.Please refer to Fig. 1, existing audio system 10 is at CPU (central processing unit) 11 and digital signal processor (DigitalSignalProcessor, DSP) configuration codes demoder (coder-decoder between 12, CODEC) 13, wherein digital signal processor 12 connects microphone 14,15, and coding decoder 13 is connection loudspeaker 16 then.This system architecture can only provide transmission demand during call, cannot provide signal transacting when playing music or recording.Please refer to Fig. 2, another kind of existing audio system 20 adopts a kind of coding decoder 22 comprising digital signal processing function to carry out auxiliary centre processing unit 21 audio signal, and wherein coding decoder 22 connects microphone 23,24 and loudspeaker 25.But this system architecture needs to expend considerable research and development development of manpower audio frequency processing capacity, the relative cost of development too increasing device.
Summary of the invention
In view of this, the invention provides a kind of audio system and audio-frequency processing method, the characteristic of audio system sound intermediate frequency element can be integrated with audio signal.
The invention provides a kind of audio system, it comprises CPU (central processing unit), digital signal processor and coding decoder.Wherein, digital signal processor connects CPU (central processing unit), in order to auxiliary centre processing unit processes sound signal.Coding decoder is linking number word signal processor, in order to coding and the decoding of auxiliary centre processing unit processes audio files.Digital signal processor is the signal transacting demand receiving CPU (central processing unit) output, the data transmission channel between conducting CPU (central processing unit) according to this and coding decoder.
In one embodiment of this invention, above-mentioned audio system also comprises switch.This switch connects CPU (central processing unit), coding decoder and this digital signal processor respectively, in order to receive the switching signal that digital signal processor exports, data transmission channel between conducting CPU (central processing unit) according to this and coding decoder, wherein said switching signal is that the signal transacting demand that digital signal processor exports according to CPU (central processing unit) produced.
In one embodiment of this invention, when above-mentioned CPU (central processing unit) is included in and receives starting-up signal, output signal processing demands with conducting data transmission channel, and also exports start voice prompt by the process of data transmission channel request coding decoder.
In one embodiment of this invention, above-mentioned coding decoder comprises the process via digital signal processor, connects microphone module to receive voice signal, or via the process of digital signal processor, connection horn module or earphone are with output sound signal.
In one embodiment of this invention, above-mentioned digital signal processor is when CPU (central processing unit) performs call function, adjusts its at least one parameter in order to audio signal, and realize audio frequency processing capacity according to signal transacting demand.Described audio frequency processing capacity comprises microphone volume, microphone frequency response, microphone anti-noise ability, horn volume, speech recognition or echo and suppresses.
In one embodiment of this invention, above-mentioned digital signal processor is when CPU (central processing unit) performs sound-recording function or camera function, according to signal transacting demand, use its at least one parameter in order to digital signal processor processes sound signal of sound scenery setting adjustment, and realize the optimization of sound scenery.
In one embodiment of this invention, above-mentioned digital signal processor is when CPU (central processing unit) performs the playing function of audio files, according to signal transacting demand, enter directly by pattern, and audio files is directly sent to coding decoder to decode by CPU (central processing unit).
The invention provides a kind of audio-frequency processing method, be applicable to audio system, this audio system comprises CPU (central processing unit), the connection digital signal processor of CPU (central processing unit), the coding decoder of linking number word signal processor and connects the switch of CPU (central processing unit) and coding decoder respectively.The method performs audio frequency processing capacity by CPU (central processing unit), and produce signal transacting demand.Then, by digital signal processor according to signal transacting demand, adjust its in order at least one parameter of audio signal audio signal.In addition, digital signal processor is also according to signal transacting demand, and the data transmission channel between conducting CPU (central processing unit) and coding decoder, makes CPU (central processing unit) by the coding of data transmission channel request coding decoder process audio files and decoding.
In one embodiment of this invention, above-mentioned audio system also comprise respectively with CPU (central processing unit), the switch that coding decoder is connected with digital signal processor, and above-mentioned digital signal processor is according to signal transacting demand, conducting data transmission channel, CPU (central processing unit) is comprised by digital signal processor according to signal transacting demand by the coding of data transmission channel request coding decoder process audio files and the step of decoding, output switching signal is to above-mentioned switch, with the data transmission channel between conducting CPU (central processing unit) and coding decoder, make CPU (central processing unit) by the coding of data transmission channel request coding decoder process audio files and decoding.
In one embodiment of this invention, above-mentioned digital signal processor is according to signal transacting demand, data transmission channel between conducting CPU (central processing unit) and coding decoder, CPU (central processing unit) is comprised by digital signal processor according to signal transacting demand conducting data transmission channel by the coding of data transmission channel request coding decoder process audio files and the step of decoding, make CPU (central processing unit) by the process of data transmission channel request coding decoder and export start voice prompt, wherein said signal transacting demand is that CPU (central processing unit) produced when receiving starting-up signal.
In one embodiment of this invention, above-mentioned digital signal processor is according to signal transacting demand, the step of adjustment audio signal in order to the parameter of audio signal comprises by digital signal processor according to signal transacting demand, adjust its parameter in order to audio signal, and realize audio frequency processing capacity, wherein said signal transacting demand is that CPU (central processing unit) produced when performing call function, and described audio frequency processing capacity comprises microphone volume, microphone frequency response, microphone anti-noise ability, horn volume, speech recognition or echo suppress.
In one embodiment of this invention, above-mentioned digital signal processor is according to signal transacting demand, the step of adjustment audio signal in order to the parameter of audio signal comprises digital signal processor according to signal transacting demand, use the parameter of its audio signal of sound scenery setting adjustment, and realizing the optimization of sound scenery, wherein said signal transacting demand is that CPU (central processing unit) produced when performing sound-recording function or camera function.
In one embodiment of this invention, above-mentioned digital signal processor is according to signal transacting demand, the step of adjustment audio signal in order to the parameter of audio signal comprises by digital signal processor according to signal transacting demand, enter and connected pattern always, and audio files is directly sent to coding decoder to decode by CPU (central processing unit), wherein said signal transacting demand is that CPU (central processing unit) produced when performing the playing function of audio files.
Based on above-mentioned, digital signal processor is configured in the framework between CPU (central processing unit) and coding decoder by audio system of the present invention and audio-frequency processing method employing, and between CPU (central processing unit) and coding decoder deploy switch, and the demand of audio frequency processing capacity can be performed according to CPU (central processing unit), change-over switch transmits data with the data transmission channel between direct conducting CPU (central processing unit) and coding decoder where necessary, thus reaches the object of the audio frequency treatment efficiency improving audio system.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Fig. 1 illustrates the Organization Chart of existing audio system;
Fig. 2 illustrates the Organization Chart of another kind of existing audio system;
Fig. 3 is the calcspar of the audio system illustrated according to one embodiment of the invention;
Fig. 4 is the process flow diagram of the audio-frequency processing method illustrated according to one embodiment of the invention;
Fig. 5 is the calcspar of the audio system illustrated according to another embodiment of the present invention;
Fig. 6 is the process flow diagram of the audio-frequency processing method illustrated according to another embodiment of the present invention.
Description of reference numerals:
10,20,30,50: audio system;
11,21,31,51: CPU (central processing unit);
12,32,32,52: digital signal processor;
13,22,33,53: coding decoder;
14,15,23,24,34,55: microphone;
16,25,35,56: loudspeaker;
36,57: earphone;
54: switch;
S402 ~ S406: the step of the audio-frequency processing method of one embodiment of the invention;
S602 ~ S618: the step of the audio-frequency processing method of one embodiment of the invention.
Embodiment
The invention provides a kind of system combination concept of audio components, by CPU (central processing unit) (CentralProcessingUnit, CPU), digital signal processor (DigitalSignalProcessor, DSP), coding decoder (coder-decoder, CODEC), the audio components such as power amplifier, microphone, loudspeaker arranges with the framework of system optimization, thus meets all voice applications.
Fig. 3 is the calcspar of the audio system illustrated according to one embodiment of the invention.Please refer to Fig. 3, the audio system 30 of the present embodiment is such as be configured in provide audio frequency processing capacity in hand-held action device, and comprising CPU (central processing unit) 31, digital signal processor 32 and coding decoder 33, its function is described below:
CPU (central processing unit) 31 is the arithmetic cores as hand-held action device, in order to control the overall operation of hand-held action device, and performs the diversified functions such as call, recording, shooting, data processing, multimedia.
Digital signal processor 32 is such as connect CPU (central processing unit) 31, in order to the sound signal in auxiliary centre processing unit 31 voice communications by internal integrated circuit (Inter-IntegratedCircuit, I2C) interface.
Coding decoder 33 is also such as by I2C interface linking number word signal processor 32, and via the link of digital signal processor 32, receives the instruction of CPU (central processing unit) 31, processes coding and the decoding of audio files with auxiliary centre processing unit 31.Wherein, coding decoder 33 can via the process of digital signal processor 32, be connected to voice input device such as microphone 34 grade, and the voice signal of analogy is received by microphone 34, and be converted to pulse code modulation (PCM) (PulseCodeModulation, PCM) data to be supplied to CPU (central processing unit) 31.In addition, coding decoder 33 also via the process of digital signal processor 32, be connected to the audio output device such as loudspeaker 35, earphone 36, and file transform CPU (central processing unit) 31 exported can be the voice signal of analogy, and be exported by loudspeaker 35 or earphone 36.
It should be noted that, CPU (central processing unit) 31 is when performing audio frequency processing capacity, namely can produce signal transacting demand and export digital signal processor 32 to, and digital signal processor 32 is when receiving signal transacting demand, then can according to this signal transacting demand, by the data transmission channel conducting between CPU (central processing unit) 31 and coding decoder 33, CPU (central processing unit) 31 is made to process coding and the decoding of audio files by this data transmission channel request coding decoder 33.
By above-mentioned framework, digital signal processor 32 can perform the demand of audio frequency processing capacity according to CPU (central processing unit) 31, select by itself carrying out audio signal or changing the coding and the decoding that process audio files with coding decoder 33, thus reach the optimization of audio frequency process.Below then describe in detail for an embodiment again.
Fig. 4 is the process flow diagram of the audio-frequency processing method illustrated according to one embodiment of the invention.Please refer to Fig. 4, the audio-frequency processing method of the present embodiment is applicable to the audio system 30 of Fig. 3, the detailed step of the every component description audio-frequency processing method in Fig. 3 of namely arranging in pairs or groups below:
First, perform audio frequency processing capacity by CPU (central processing unit) 31, and produce signal transacting demand (step S402).Described audio frequency processing capacity comprises microphone volume, microphone frequency response, microphone anti-noise ability, horn volume, speech recognition or echo and suppresses, and does not limit at this.
Wherein, when audio frequency processing capacity performed by CPU (central processing unit) 31 needs audio signal, the signal transacting demand that digital signal processor 32 can export according to CPU (central processing unit) 31, adjusts it in order at least one parameter of audio signal and uses this parameter processing sound signal (step S404).
In addition, when audio frequency processing capacity performed by CPU (central processing unit) 31 needs coding and the decoding processing audio files, the signal transacting demand that digital signal processor 32 can export according to CPU (central processing unit) 31, by the data transmission channel conducting between CPU (central processing unit) 31 and coding decoder 33, CPU (central processing unit) 31 is made to process coding and the decoding (step S406) of audio files by this data transmission channel request coding decoder 33.
By said method, the audio components such as CPU (central processing unit), digital signal processor, coding decoder can be integrated by system dealer, and go to meet all voice applications with system of optimizing framework.In addition, system dealer, when development system, also only needs to improve for digital signal processor, thus saves the cost of system development.
It should be noted that, oneself audio signal is selected by digital signal processor except above-mentioned, or select data transmission channel conducting directly to ask outside the coding of coding decoder process audio files and the mode of decoding for CPU (central processing unit), the present invention also can outside digital signal processor additional configuration one independently switch, by the control of digital signal processor, thus realize above-mentioned audio frequency processing capacity.Below then describe in detail for an embodiment again.
Fig. 5 is the calcspar of the audio system illustrated according to another embodiment of the present invention.Please refer to Fig. 5, the audio system 50 of the present embodiment is such as be configured in hand-held action device to provide audio frequency processing capacity, comprising CPU (central processing unit) 51, digital signal processor 52, coding decoder 53 and switch 54, and coding decoder 53 is also via the process of digital signal processor 52, be connected to microphone 55, loudspeaker 56 and earphone 57.Wherein, CPU (central processing unit) 51, digital signal processor 52, coding decoder 53, microphone 55, loudspeaker 56 are same or similar with the CPU (central processing unit) 31 in previous embodiment, digital signal processor 32, coding decoder 33, microphone 34, loudspeaker 35 and earphone 36 with the function of earphone 57, therefore do not repeat them here.
With previous embodiment unlike, the present embodiment is between CPU (central processing unit) 51 and coding decoder 53, configure an independently switch 54, this switch 54 is such as connect CPU (central processing unit) 51 and coding decoder 53 respectively by I2C interface, the control end of switch 54 is such as connected to digital signal processor 52, and by the control of digital signal processor 52, by the data transmission channel conducting between CPU (central processing unit) 51 and coding decoder 53, to transmit data.Wherein, digital signal processor 52 is such as the signal transacting demand exported according to CPU (central processing unit) 51, judge whether to want conducting data transmission channel, and when determining to want conducting data transmission channel, output switching signal is to the control end of switch 54, by the data transmission channel between conducting CPU (central processing unit) 51 and coding decoder 53, CPU (central processing unit) 51 is made directly to ask coding decoder 53 to process coding and the decoding of audio files by this data transmission channel.
In sum, audio-frequency processing method of the present invention according to the characteristic of audio components every in audio system 50, can be integrated system of optimizing framework, thus meets various audio demand.And for different audio demand, the present invention also provides corresponding processing mode.Below then describe in detail for an embodiment again.
Fig. 6 is the process flow diagram of the audio-frequency processing method illustrated according to another embodiment of the present invention.Please refer to Fig. 6, the audio-frequency processing method of the present embodiment is applicable to the audio system 30 of Fig. 3, the detailed step of the every component description audio-frequency processing method in Fig. 3 of namely arranging in pairs or groups below:
First, perform audio frequency processing capacity by CPU (central processing unit) 31, and produce signal transacting demand (step S602).In the present embodiment, the audio frequency processing capacity that CPU (central processing unit) 31 performs comprises call function, sound-recording function or camera function, the playing function of audio files and power up function.
Wherein, when CPU (central processing unit) 31 is when performing call function, the adjustment parameter of audio components such as can be added in signal transacting demand, and namely digital signal processor 32 according to the parameter (step S604) of this signal transacting demand adjustment in order to audio signal, and can perform the audio frequency processing capacities (step S606) such as microphone volume, microphone frequency response, microphone anti-noise ability, horn volume, speech recognition or echo suppression.
When CPU (central processing unit) 31 is when performing sound-recording function or camera function, the kind of sound scenery such as can be added in signal transacting demand, and namely digital signal processor 32 can use that preset or that user manually selects sound scenery setting according to this signal transacting demand, adjust the parameter (step S608) in order to audio signal, and perform audio frequency processing capacity, thus realize the optimization (step S610) of sound scenery.
When CPU (central processing unit) 31 is when performing the playing function of audio files, such as can add audio files in signal transacting demand, and namely digital signal processor 32 can enter directly by (passthrough) pattern according to this signal transacting demand, and by the data transmission channel conducting (step S612) between CPU (central processing unit) 31 and coding decoder 33, make CPU (central processing unit) 31, by this data transmission channel, audio files is directly sent to coding decoder 33 to carry out decode (step S614).
When CPU (central processing unit) 31 receives starting-up signal, such as can add start hint instructions in signal transacting demand, and namely digital signal processor 32 according to this signal transacting demand by the data transmission channel conducting (step S616) between CPU (central processing unit) 31 and coding decoder 33, can make CPU (central processing unit) 31 process by this data transmission channel request coding decoder 33 and exports start voice prompt (step S618).
In sum, the invention provides audio system and the audio-frequency processing method of a set of integration audio components characteristic, demand when it can perform audio frequency processing capacity for CPU (central processing unit), there is provided CPU (central processing unit) choice for use digital signal processor to carry out audio signal or use coding decoder to process coding and the decoding of audio files, thus promote the performance of audio system, and the cost of development of audio system can be reduced.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. an audio system, is characterized in that, comprising:
One CPU (central processing unit);
One digital signal processor, connects this CPU (central processing unit), this central processing unit for processing one sound signal auxiliary;
One coding decoder, connects this digital signal processor, the coding of this central processing unit for processing one audio files auxiliary and decoding, wherein
This digital signal processor receives the signal transacting demand that this CPU (central processing unit) exports, the data transmission channel between this CPU (central processing unit) of conducting according to this and this coding decoder, wherein
This CPU (central processing unit) passes through coding and the decoding of this this audio files of coding decoder process of this data transmission channel request.
2. audio system according to claim 1, also comprises:
One switch, connect this CPU (central processing unit), this coding decoder and this digital signal processor respectively, receive the switching signal that this digital signal processor exports, this data transmission channel between this CPU (central processing unit) of conducting according to this and this coding decoder, wherein this switching signal is that this signal transacting demand that this digital signal processor exports according to this CPU (central processing unit) produced.
3. audio system according to claim 1, when wherein this CPU (central processing unit) is included in and receives a starting-up signal, export this signal transacting demand with this data transmission channel of conducting, and export a start voice prompt by this coding decoder process of this data transmission channel request.
4. audio system according to claim 1, wherein this digital signal processor is included in this CPU (central processing unit) when performing a call function, adjusts it in order to process at least one parameter of this sound signal, and realizes an audio frequency processing capacity.
5. audio system according to claim 1, wherein this digital signal processor is included in this CPU (central processing unit) when performing the playing function of this audio files, enter and connected pattern always, and this audio files is directly sent to this coding decoder to decode by this CPU (central processing unit).
6. an audio-frequency processing method, be applicable to an audio system, this audio system comprises a CPU (central processing unit), connects a digital signal processor of this CPU (central processing unit) and connects a coding decoder of this digital signal processor, and it is characterized in that, the method comprises the following steps:
This CPU (central processing unit) performs an audio frequency processing capacity, and produces a signal transacting demand;
This digital signal processor, according to this signal transacting demand, adjusts to process at least one parameter of a sound signal and processes this sound signal; And
This digital signal processor is according to this signal transacting demand, a data transmission channel between this CPU (central processing unit) of conducting and this coding decoder, makes this CPU (central processing unit) by the coding of this coding decoder process one audio files of this data transmission channel request and decoding.
7. audio-frequency processing method according to claim 6, wherein this audio system also comprises the switch be connected with this digital signal processor with this CPU (central processing unit), this coding decoder respectively, and this digital signal processor is according to this signal transacting demand, this data transmission channel between this CPU (central processing unit) of conducting and this coding decoder, makes this CPU (central processing unit) be comprised by the coding of this this audio files of coding decoder process of this data transmission channel request and the step of decoding:
This digital signal processor is according to this signal transacting demand, export a switching signal to this switch, with this data transmission channel between this CPU (central processing unit) of conducting and this coding decoder, make this CPU (central processing unit) by the coding of this this audio files of coding decoder process of this data transmission channel request and decoding.
8. audio-frequency processing method according to claim 6, wherein this digital signal processor is according to this signal transacting demand, this data transmission channel between this CPU (central processing unit) of conducting and this coding decoder, makes this CPU (central processing unit) be comprised by the coding of this coding decoder process one audio files of this data transmission channel request and the step of decoding:
This digital signal processor is according to this signal transacting demand, this data transmission channel of conducting, make this CPU (central processing unit) by this coding decoder process of this data transmission channel request and export a start voice prompt, wherein this signal transacting demand is that this CPU (central processing unit) produced when receiving a starting-up signal.
9. audio-frequency processing method according to claim 6, wherein this digital signal processor is according to this signal transacting demand, adjusts to process the described parameter of this sound signal and the step processing this sound signal comprises:
This digital signal processor is according to this signal transacting demand, and adjust it in order to process the described parameter of this sound signal, and realize an audio frequency processing capacity, wherein this signal transacting demand is that this CPU (central processing unit) produced when execution one call function.
10. audio-frequency processing method according to claim 6, wherein this digital signal processor is according to this signal transacting demand, adjusts to process the described parameter of this sound signal and the step processing this sound signal comprises:
This digital signal processor is according to this signal transacting demand, enter and connected pattern always, and this audio files is directly sent to this coding decoder to decode by this CPU (central processing unit), wherein this signal transacting demand is that this CPU (central processing unit) produced when performing the playing function of this audio files.
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