CN103377676A - Audio system and audio processing method - Google Patents
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Abstract
The invention provides an audio system and an audio processing method. The audio system comprises a central processing unit, a digital signal processor and a codec. The digital signal processor is connected with the central processing unit, and the central processing unit processes audio signals through the digital signal processor. The codec is connected with the digital signal processor, and the central processing unit processes encoding and decoding of audio files through the codec. The digital signal processor receives signal processing demands output by the central processing unit so as to connect a data transmission channel between the central processing unit and the codec to transmit data.
Description
Technical field
The invention relates to a kind of audio system and audio-frequency processing method, and particularly relevant for a kind of audio system and audio-frequency processing method of integrating the audio components characteristic.
Background technology
Because the hand-held board device that American apple (Apple) company leads 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) (Central Processing Unit, CPU) that the companies such as (Nvidia), Texas Instrument (TI) and ultra micro (AMD) develop double-core and four cores in succession.Provide optimized design yet audio system that these CPU (central processing unit) provide is integrated and all can't be processed for voice signal, echo inhibition, anti-noise are processed, audio is processed with the application such as speech recognition.
In hand-held action device, the panel computer in non-apple camp is because can't develop integrated CPU (central processing unit) and peripheral element, therefore cause the device inner space to be subject to the impact of electronic component and mechanism's part layout, the characteristic of whole audio system comprises that the performance of speaker system and microphone system usually is left in the basket, and causes consumer's complaint.
For instance, 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 (Digital Signal Processor, DSP) configuration codes demoder (coder-decoder between 12, CODEC) 13, wherein digital signal processor 12 is to connect microphone 14,15, and coding decoder 13 is connection loudspeaker 16 then.Transmission demand when this system architecture can only provide conversation, the signal when music playing or recording can't be provided is processed.Please refer to Fig. 2,20 of another kind of existing audio systems are to adopt a kind of coding decoder 22 that comprises digital signal processing function to come auxiliary centre processing unit 21 audio signal, and wherein coding decoder 22 is to connect microphone 23,24 and loudspeaker 25.Yet this system architecture need to expend considerable research and development development of manpower audio frequency processing capacity, the relative cost of development that has also increased device.
Summary of the invention
In view of this, the invention provides a kind of audio system and audio-frequency processing method, can integrate the characteristic of audio system sound intermediate frequency element 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 is to connect CPU (central processing unit), in order to auxiliary centre processing unit processes sound signal.Coding decoder is the 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 processing demands that receives CPU (central processing unit) output, the data transmission channel between according to this conducting CPU (central processing unit) and the coding decoder.
In one embodiment of this invention, above-mentioned audio system also comprises switch.This switch is to connect respectively CPU (central processing unit), coding decoder and this digital signal processor, switching signal in order to the output of receiving digital signals processor, data transmission channel between according to this conducting CPU (central processing unit) and the coding decoder, wherein said switching signal are that the signal processing demands that digital signal processor is exported according to CPU (central processing unit) produces.
In one embodiment of this invention, above-mentioned CPU (central processing unit) is included in when receiving starting-up signal, and the output signal processing demands is with the conducting data transmission channel, and processes and output start voice prompt by data transmission channel request coding decoder.
In one embodiment of this invention, above-mentioned coding decoder comprises the processing via digital signal processor, connects microphone module to receive voice signal, perhaps via the processing of digital signal processor, connects horn module or earphone with output sound signal.
In one embodiment of this invention, above-mentioned digital signal processor is when CPU (central processing unit) is carried out call function, adjusts it in order at least one parameter of audio signal according to the signal processing demands, and realizes the audio frequency processing capacity.Described audio frequency processing capacity comprises that 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 when CPU (central processing unit) is carried out sound-recording function or camera function, according to the signal processing demands, use a sound scenery to set and adjust its at least one parameter in order to the digital signal processor processes sound signal, and the optimization of realization sound scenery.
In one embodiment of this invention, above-mentioned digital signal processor is when CPU (central processing unit) is carried out the playing function of audio files, according to the signal processing demands, enter and directly pass through pattern, and audio files directly is 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), connects digital signal processor, the coding decoder of linking number word signal processor and the switch that connects respectively CPU (central processing unit) and coding decoder of CPU (central processing unit).The method is to carry out the audio frequency processing capacity by CPU (central processing unit), and produces the signal processing demands.Then, according to the signal processing demands, adjust it in order at least one parameter of audio signal and audio signal by digital signal processor.In addition, digital signal processor is also according to the signal processing demands, and the data transmission channel between conducting CPU (central processing unit) and the coding decoder is so that CPU (central processing unit) is processed coding and the decoding of audio files by data transmission channel request coding decoder.
In one embodiment of this invention, above-mentioned audio system also comprises respectively and CPU (central processing unit), the switch that coding decoder is connected with digital signal processor, and above-mentioned digital signal processor is according to the signal processing demands, the conducting data transmission channel, so that CPU (central processing unit) processes the coding of audio files by data transmission channel request coding decoder and the step of decoding comprises by digital signal processor according to the signal processing demands, the output switching signal is to above-mentioned switch, with the data transmission channel between conducting CPU (central processing unit) and the coding decoder, so that CPU (central processing unit) is processed coding and the decoding of audio files by data transmission channel request coding decoder.
In one embodiment of this invention, above-mentioned digital signal processor is according to the signal processing demands, data transmission channel between conducting CPU (central processing unit) and the coding decoder, so that CPU (central processing unit) processes the coding of audio files by data transmission channel request coding decoder and the step of decoding comprises by digital signal processor according to signal processing demands conducting data transmission channel, so that CPU (central processing unit) is processed by data transmission channel request coding decoder and output start voice prompt, wherein said signal processing demands be CPU (central processing unit) when receiving starting-up signal institute produce.
In one embodiment of this invention, above-mentioned digital signal processor is according to the signal processing demands, the step of adjustment audio signal in order to the parameter of audio signal comprises by digital signal processor according to the signal processing demands, adjust it in order to the parameter of audio signal, and realization audio frequency processing capacity, wherein said signal processing demands is that CPU (central processing unit) produces when carrying out call function, and described audio frequency processing capacity comprises that 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 the signal processing demands, the step of adjustment audio signal in order to the parameter of audio signal comprises that digital signal processor is according to the signal processing demands, use a sound scenery to set the parameter of adjusting its audio signal, and the optimization of realization sound scenery, wherein said signal processing demands is that CPU (central processing unit) institute when carrying out sound-recording function or camera function produces.
In one embodiment of this invention, above-mentioned digital signal processor is according to the signal processing demands, the step of adjustment audio signal in order to the parameter of audio signal comprises by digital signal processor according to the signal processing demands, enter the pattern of always connecting, and audio files directly is sent to coding decoder to decode by CPU (central processing unit), wherein said signal processing demands is that CPU (central processing unit) produces when carrying out the playing function of audio files.
Based on above-mentioned, audio system of the present invention and audio-frequency processing method adopt digital signal processor are configured in framework between CPU (central processing unit) and the coding decoder, and between CPU (central processing unit) and coding decoder deploy switch, and can carry out according to CPU (central processing unit) the demand of audio frequency processing capacity, where necessary change-over switch with the data transmission channel between direct conducting CPU (central processing unit) and the coding decoder the transmission of data, thereby reach the purpose of the audio frequency treatment efficiency that improves audio system.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate accompanying drawing to be described in detail below.
Description of drawings
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 that illustrates according to one embodiment of the invention;
Fig. 4 is the process flow diagram of the audio-frequency processing method that illustrates according to one embodiment of the invention;
Fig. 5 is the calcspar of the audio system that illustrates according to another embodiment of the present invention;
Fig. 6 is the process flow diagram of the audio-frequency processing method that illustrates 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, with CPU (central processing unit) (Central Processing Unit, CPU), digital signal processor (Digital Signal Processor, DSP), coding decoder (coder-decoder, CODEC), the audio components such as power amplifier, microphone, loudspeaker is with the framework setting of system optimization, thereby satisfy all voice applications.
Fig. 3 is the calcspar of the audio system that illustrates according to one embodiment of the invention.Please refer to Fig. 3, the audio system 30 of present embodiment for example is to be configured in the hand-held action device so that the audio frequency processing capacity to be provided, 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 controlling the overall operation of hand-held action device, and carries out the diversified functions such as conversation, recording, shooting, data processing, multimedia.
Digital signal processor 32 for example is to connect CPU (central processing unit) 31 by internal integrated circuit (Inter-Integrated Circuit, I2C) interface, in order to the sound signal in auxiliary centre processing unit 31 voice communications.
Coding decoder 33 for example also is by I2C interface linking number word signal processor 32, and via the binding 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 be via the processing of digital signal processor 32, be connected to microphone 34 voice input devices such as grade, and can be by the voice signal of microphone 34 reception analogies, and be converted to pulse code modulation (PCM) (Pulse Code Modulation, PCM) data to offer CPU (central processing unit) 31.In addition, coding decoder 33 also can be connected to the audio output devices such as loudspeaker 35, earphone 36 via the processing of digital signal processor 32, and the file conversion that CPU (central processing unit) 31 is exported is the voice signal of analogy, and by loudspeaker 35 or earphone 36 outputs.
It should be noted that, CPU (central processing unit) 31 is when carrying out the audio frequency processing capacity, namely can produce the signal processing demands and export digital signal processor 32 to, and digital signal processor 32 is when receiving the signal processing demands, then can be according to this signal processing demands, with the data transmission channel conducting between CPU (central processing unit) 31 and the coding decoder 33, so that CPU (central processing unit) 31 can be processed by this data transmission channel request coding decoder 33 coding and the decoding of audio files.
By above-mentioned framework, digital signal processor 32 can be carried out according to CPU (central processing unit) 31 demand of audio frequency processing capacity, selection is by itself coming audio signal or change coding and the decoding of processing audio files with coding decoder 33, thereby reaches the optimization that audio frequency is processed.Describe in detail for an embodiment again with next.
Fig. 4 is the process flow diagram of the audio-frequency processing method that illustrates according to one embodiment of the invention.Please refer to Fig. 4, the audio-frequency processing method of present embodiment is applicable to the audio system 30 of Fig. 3, below namely the arrange in pairs or groups detailed step of each item explanation audio-frequency processing method among Fig. 3:
At first, carry out the audio frequency processing capacity by CPU (central processing unit) 31, and produce signal processing demands (step S402).Described audio frequency processing capacity comprises that microphone volume, microphone frequency response, microphone anti-noise ability, horn volume, speech recognition or echo suppress, and do not limit at this.
Wherein, when CPU (central processing unit) 31 performed audio frequency processing capacities need audio signal, digital signal processor 32 can according to the signal processing demands of CPU (central processing unit) 31 outputs, be adjusted it in order at least one parameter of audio signal and use this parameter audio signal (step S404).
In addition, when CPU (central processing unit) 31 performed audio frequency processing capacities need to be processed the coding of audio files and decode, 32 of digital signal processors can be according to the signal processing demands of CPU (central processing unit) 31 outputs, with the data transmission channel conducting between CPU (central processing unit) 31 and the coding decoder 33, so that CPU (central processing unit) 31 can be processed by this data transmission channel request coding decoder 33 coding and the decoding (step S406) of audio files.
By said method, system dealer can integrate the audio components such as CPU (central processing unit), digital signal processor, coding decoder, and goes to satisfy all voice applications with the system of optimizing framework.In addition, system dealer also only need to do improvement for digital signal processor when development system, thereby saves the cost of system development.
It should be noted that, select own audio signal except above-mentioned by digital signal processor, or select directly to ask coding decoder to be processed outside the mode of the coding of audio files and decoding for CPU (central processing unit) the data transmission channel conducting, the present invention also can be outside digital signal processor one of additional configuration switch independently, by the control of digital signal processor, thereby realize above-mentioned audio frequency processing capacity.Describe in detail for an embodiment again with next.
Fig. 5 is the calcspar of the audio system that illustrates according to another embodiment of the present invention.Please refer to Fig. 5, the audio system 50 of present embodiment for example is to be configured in the hand-held action device so that the audio frequency processing capacity to be provided, comprising CPU (central processing unit) 51, digital signal processor 52, coding decoder 53 and switch 54, and coding decoder 53 is connected to microphone 55, loudspeaker 56 and earphone 57 also via the processing of digital signal processor 52.Wherein, the function of CPU (central processing unit) 51, digital signal processor 52, coding decoder 53, microphone 55, loudspeaker 56 and earphone 57 and the CPU (central processing unit) in the previous embodiment 31, digital signal processor 32, coding decoder 33, microphone 34, loudspeaker 35 and earphone 36 are same or similar, so do not repeat them here.
Different from previous embodiment is, present embodiment is to dispose an independently switch 54 between CPU (central processing unit) 51 and coding decoder 53, this switch 54 for example is to connect respectively CPU (central processing unit) 51 and coding decoder 53 by the I2C interface, the control end of switch 54 for example is connected to digital signal processor 52, and can be by the control of digital signal processor 52, with the data transmission channel conducting between CPU (central processing unit) 51 and the coding decoder 53, with the transmission of data.Wherein, digital signal processor 52 for example is the signal processing demands according to CPU (central processing unit) 51 outputs, judge whether to want the conducting data transmission channel, and when determining to want the conducting data transmission channel, the output switching signal is to the control end of switch 54, by the data transmission channel between conducting CPU (central processing unit) 51 and the coding decoder 53, so that CPU (central processing unit) 51 can directly 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 can according to the characteristic of every audio components in the audio system 50, be integrated the system of optimizing framework, thereby satisfy various audio frequency demands.And for different audio frequency demands, the present invention also provides corresponding processing mode.Describe in detail for an embodiment again with next.
Fig. 6 is the process flow diagram of the audio-frequency processing method that illustrates according to another embodiment of the present invention.Please refer to Fig. 6, the audio-frequency processing method of present embodiment is applicable to the audio system 30 of Fig. 3, below namely the arrange in pairs or groups detailed step of each item explanation audio-frequency processing method among Fig. 3:
At first, carry out the audio frequency processing capacity by CPU (central processing unit) 31, and produce signal processing demands (step S602).In the present embodiment, the audio frequency processing capacity of CPU (central processing unit) 31 execution comprises playing function and the power up function of call function, sound-recording function or camera function, audio files.
Wherein, when CPU (central processing unit) 31 when carrying out call function, the adjustment parameter that for example can in the signal processing demands, add audio components, and digital signal processor 32 namely can be adjusted parameter (step S604) in order to audio signal according to this signal processing demands, and carries out the audio frequency processing capacities (step S606) such as microphone volume, microphone frequency response, microphone anti-noise ability, horn volume, speech recognition or echo inhibition.
When CPU (central processing unit) 31 when carrying out sound-recording function or camera function, the kind that for example can in the signal processing demands, add sound scenery, and digital signal processor 32 namely can use sound scenery default or that the user manually selects to set according to this signal processing demands, adjustment is in order to the parameter (step S608) of audio signal, and carry out the audio frequency processing capacity, thereby realize the optimization (step S610) of sound scenery.
When CPU (central processing unit) 31 when carrying out the playing function of audio files, for example can in the signal processing demands, add audio files, and digital signal processor 32 namely can enter directly by (pass through) pattern according to this signal processing demands, and with the data transmission channel conducting (step S612) between CPU (central processing unit) 31 and the coding decoder 33, so that CPU (central processing unit) 31 can directly be sent to coding decoder 33 with decode (step S614) with audio files by this data transmission channel.
When CPU (central processing unit) 31 receives starting-up signal, for example can in the signal processing demands, add the start hint instructions, and digital signal processor 32 namely can be according to this signal processing demands with the data transmission channel conducting (step S616) between CPU (central processing unit) 31 and the coding decoder 33, so that CPU (central processing unit) 31 can be processed and output start voice prompt (step S618) by this data transmission channel request coding decoder 33.
In sum, the invention provides a cover and integrate audio system and the audio-frequency processing method of audio components characteristic, demand when it can carry out the audio frequency processing capacity for CPU (central processing unit), provide CPU (central processing unit) choice for use digital signal processor to come audio signal or process coding and the decoding of audio files with coding decoder, thereby promote the performance performance of audio system, and can reduce the cost of development of audio system.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away 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), auxiliary this central processing unit for processing one sound signal;
One coding decoder connects this digital signal processor, coding and the decoding of auxiliary this central processing unit for processing one audio files, wherein
This digital signal processor receives a signal processing demands of this CPU (central processing unit) output, the data transmission channel between this CPU (central processing unit) of according to this conducting and this coding decoder.
2. audio system according to claim 1 also comprises:
One switch, connect respectively this CPU (central processing unit), this coding decoder and this digital signal processor, receive one of this digital signal processor output and switch signal, this data transmission channel between this CPU (central processing unit) of according to this conducting and this coding decoder, wherein this switching signal is that this signal processing demands that this digital signal processor is exported according to this CPU (central processing unit) produces.
3. audio system according to claim 1, wherein this CPU (central processing unit) is included in when receiving a starting-up signal, export this signal processing demands with this data transmission channel of conducting, and process and export a start voice prompt by this coding decoder of this data transmission channel request.
4. audio system according to claim 1 when wherein this digital signal processor is included in this CPU (central processing unit) and carries out a call function, is adjusted it in order to processing at least one parameter of this sound signal, and is realized an audio frequency processing capacity.
5. audio system according to claim 1, when wherein this digital signal processor is included in this CPU (central processing unit) and carries out the playing function of this audio files, enter the pattern of always connecting, and this audio files directly is sent to this coding decoder to decode by this CPU (central processing unit).
6. audio-frequency processing method, be applicable to an audio system, the coding decoder that this audio system comprises a CPU (central processing unit), connects a digital signal processor of this CPU (central processing unit) and connect this digital signal processor is characterized in that the method comprises the following steps:
This CPU (central processing unit) is carried out an audio frequency processing capacity, and produces a signal processing demands;
This digital signal processor is adjusted and is processed this sound signal in order at least one parameter of processing a sound signal according to this signal processing demands; And
This digital signal processor is according to this signal processing demands, data transmission channel between this CPU (central processing unit) of conducting and this coding decoder is so that this CPU (central processing unit) is processed coding and the decoding of an audio files by this this coding decoder of data transmission channel request.
7. audio-frequency processing method according to claim 6, wherein this audio system also comprises respectively a switch that is connected with this digital signal processor with this CPU (central processing unit), this coding decoder, and this digital signal processor is according to this signal processing demands, this data transmission channel between this CPU (central processing unit) of conducting and this coding decoder, so that this CPU (central processing unit) processes the coding of this audio files by this this coding decoder of data transmission channel request and the step of decoding comprises:
This digital signal processor is according to this signal processing demands, output one is switched signal to this switch, with this data transmission channel between this CPU (central processing unit) of conducting and this coding decoder, so that this CPU (central processing unit) is processed coding and the decoding of this audio files by this this coding decoder of data transmission channel request.
8. audio-frequency processing method according to claim 6, wherein this digital signal processor is according to this signal processing demands, this data transmission channel between this CPU (central processing unit) of conducting and this coding decoder, so that this CPU (central processing unit) processes the coding of an audio files by this this coding decoder of data transmission channel request and the step of decoding comprises:
This digital signal processor is according to this signal processing demands, this data transmission channel of conducting, so that this CPU (central processing unit) processes and exports a start voice prompt by this coding decoder of this data transmission channel request, wherein this signal processing demands be this CPU (central processing unit) when receiving a starting-up signal institute produce.
9. audio-frequency processing method according to claim 6, wherein this digital signal processor is adjusted the step of processing this sound signal in order to the described parameter of processing this sound signal and is comprised according to this signal processing demands:
This digital signal processor is according to this signal processing demands, adjusts it in order to processing the described parameter of this sound signal, and realizes an audio frequency processing capacity, and wherein this signal processing demands is that this CPU (central processing unit) institute when carrying out a call function produces.
10. audio-frequency processing method according to claim 6, wherein this digital signal processor is adjusted the step of processing this sound signal in order to the described parameter of processing this sound signal and is comprised according to this signal processing demands:
This digital signal processor is according to this signal processing demands, enter the pattern of always connecting, and this audio files directly is sent to this coding decoder to decode by this CPU (central processing unit), wherein this signal processing demands is that this CPU (central processing unit) produces when carrying out the playing function of this audio files.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103561174A (en) * | 2013-11-05 | 2014-02-05 | 英华达（南京）科技有限公司 | Method and system for improving SNR |
Citations (2)
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| TW512312B (en) * | 1999-12-21 | 2002-12-01 | Inventec Corp | Multimedia system with recorder and player functions |
| US20070199020A1 (en) * | 2006-02-18 | 2007-08-23 | Samsung Electronics Co., Ltd. | Portable device capable of receiving broadcasts, operating method of the portable device, and computer-readable recording medium storing computer program to execute the operating method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW512312B (en) * | 1999-12-21 | 2002-12-01 | Inventec Corp | Multimedia system with recorder and player functions |
| US20070199020A1 (en) * | 2006-02-18 | 2007-08-23 | Samsung Electronics Co., Ltd. | Portable device capable of receiving broadcasts, operating method of the portable device, and computer-readable recording medium storing computer program to execute the operating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561174A (en) * | 2013-11-05 | 2014-02-05 | 英华达（南京）科技有限公司 | Method and system for improving SNR |
| TWI589145B (en) * | 2013-11-05 | 2017-06-21 | 英華達股份有限公司 | A system and method of improving signal-to-noise ratio |
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