CN103280233A - Audio processing system based on system on chip - Google Patents
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- CN103280233A CN103280233A CN2013101863210A CN201310186321A CN103280233A CN 103280233 A CN103280233 A CN 103280233A CN 2013101863210 A CN2013101863210 A CN 2013101863210A CN 201310186321 A CN201310186321 A CN 201310186321A CN 103280233 A CN103280233 A CN 103280233A
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Abstract
The invention relates to an audio processing system based on a system on chip. The audio processing system comprises a main processor, an audio processor, an audio output interface and an audio file input interface, wherein the main processor, the audio processor, the audio output interface and the audio file input interface are communicated with one another through buses, the audio file input interface is used for inputting audio media file decoding tasks into the main processor, the main processor is used for assigning the audio media file decoding tasks received from the audio file input interface to the audio processor, and the audio processor is used for decoding audio media files corresponding to the assigned audio media file decoding tasks and outputting decoded audio media files through the audio output interface. By arranging the audio processor which is dedicatedly used for processing and decoding the audio media files and is independent from the main processor, the burden of the main processor can be greatly alleviated, the response speed of the system can be increased, and the high-quality audio processing can be ensured.
Description
Technical field
The present invention relates to integrated circuit fields, be specifically related to the audio frequency processing system based on SOC (system on a chip).
Background technology
All computing systems all have a calculation process center at least, such as computer, MP3 player, GPS navigation instrument, mobile phone etc.
In the arithmetic processing system of current social, portable product field particularly, various processors or system on chip (following represent with SOC (system on a chip)) emerge in an endless stream, and have their own characteristics each.From reduction process speed simple functions high speed and the multinuclear heart and complicated peripheral hardware till now originally, arithmetic core has experienced development fast, and drives mutually, develops with characteristic application/complicated applications.
8 early stage megahertz arithmetic speeds, carry simple peripheral hardware such as serial ports, GPIO, occurred 32 tens, hundreds of megahertz arithmetic speed afterwards, and carry serial ports, GPIO, I2S, I2C, CAN, DSP module, audio frequency is handled, even the numerous and jumbled function of complete ICP/IP protocol stack etc.
SOC (system on a chip), be SOC(System On Chip, or System On a Chip), mean the single IC for both chip and comprise whole main function components, comprise processor, storer, data bus controller, digital-to-analog conversion, analog to digital conversion, communication bus, basic input and output etc., even comprise the complete ICP/IP protocol stack of Physical layer.It is in embedded system that the typical case of SOC (system on a chip) uses, such as portable equipment, and handheld device etc.What generally seen on the current market also all is this SOC (system on a chip) that is common to application, or develops for some application-specific.As Identification of Images, communication navigation etc.
The complexity of using along with market further increases, and user's requirements at the higher level, and the demand of high-quality audio frequency and video processing power is day by day highlighted.Meanwhile, but go back neither one on the market and can satisfy, adapt to the logic integrated chip that the high-quality audio frequency and video are handled well, such as single SOC (system on a chip).
If using existing arithmetic processing system handles high-quality audio frequency, because this type of arithmetic processing system is not just specially high quality audio to be handled to do optimization at the beginning of design, but be the general purpose in some fields, or other specific areas, obvious painstaking and inefficiency during the application of historical facts or anecdotes border is handled with audio frequency.In order to handle the high-quality audio-video frequency media better, just be forced to improve arithmetic speed and storage support, thereby increase cost greatly.
In order to realize that one special is handled the realization of optimization for audio frequency, several different methods can be arranged, the scheme that adopts such as the patent 201020653860.2 of Huizhou Huayang General Electronics Co., Ltd.But this module with similar veneer subsystem realizes, needs too many production stage than SOC, and also therefore generation is more wrong may.Meanwhile, the realization of sampling SOC mode also has, such as the realization of Korea S's Samsung patent 03155545.4.But it realizes just using the dedicated hardware units combination, such as DMA, accelerates to transmit the processing with certain link, and does not adopt the mode of special-purpose subsystem to realize.
Summary of the invention
The objective of the invention is to propose a kind of audio frequency processing system based on SOC (system on a chip), it can solve the problem that present arithmetic processing system is difficult to tackle the high quality audio media file, namely do specially the SOC (system on a chip) of special processing at the processing demands of audio media files, can guarantee a lower production cost simultaneously.
In order to achieve the above object, the technical solution adopted in the present invention is as follows:
Audio frequency processing system based on SOC (system on a chip), it comprises primary processor, audio process, audio output interface and audio file input interface, communicates by bus between primary processor, audio process, audio output interface and the audio file input interface; Described audio file input interface is used for to primary processor input audio media files decoding task; Described primary processor is used for and will distributes to audio process from the audio media files decoding task that the audio file input interface receives; Described audio process is used for the corresponding audio media files of audio media files decoding task of distributing is decoded, and carries out audio media files decoding output by audio output interface.
Preferably, in order to reduce the logical OR processor active task of primary processor, should also comprise an audio task register that communicates with bus based on audio frequency processing system of SOC (system on a chip), it is used for preserving the audio media files decoding task that primary processor is distributed to audio process.
Preferably, described audio file input interface comprises one or more in card controller, USB interface, the network interface.Further preferred, described card controller comprises one or more in CF card controller, SD/MMC card controller, NAND card controller, the SM card controller.Described network interface is 802.3MAC interface or 802.11MAC interface.
Preferably, described audio output interface comprises DAC(Digital-to-Analog Converter, digital analog converter) and/or I2S(Inter-IC Sound, integrated chip chamber sound) interface.
The present invention has following beneficial effect:
Be independent of the sole duty of primary processor by outfit for the treatment of the audio process of audio media files decoding, can greatly alleviate the burden of primary processor, improve system response time, and guarantee high-quality audio frequency processing.Meanwhile, need strengthen the audio frequency processing power again in the later stage, when perhaps adding Video processing, also only need to replace existing design or increase processing subsystem, and need not to change existing other designs.
Description of drawings
Fig. 1 is the structural representation based on the audio frequency processing system of SOC (system on a chip) of preferred embodiment of the present invention.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the present invention is described further.
As shown in Figure 1, a kind of audio frequency processing system based on SOC (system on a chip), it comprises primary processor, audio process, audio output interface, audio file input interface and audio task register.Primary processor, audio process, audio output interface, audio file input interface and audio task register all are integrated on the chip.
Communicate by bus between primary processor, audio process, audio output interface, audio file input interface and the audio task register.
Described audio file input interface is used for to primary processor input audio media files decoding task;
Described primary processor is used for and will distributes to audio process from the audio media files decoding task that the audio file input interface receives;
Described audio task register, it is used for preserving the audio media files decoding task that primary processor is distributed to audio process;
Described audio process is used for the corresponding audio media files of audio media files decoding task of distributing is decoded, and carries out audio media files decoding output by audio output interface.
Described audio file input interface comprises card controller, USB interface and network interface.Described card controller comprises CF card controller, SD/MMC card controller, NAND card controller and SM card controller.Described network interface is 802.3MAC interface or 802.11MAC interface.
Described audio output interface comprises DAC and I2S interface.
Present embodiment adopts the independent processing unit to be responsible for the decoding work of audio frequency, namely uses the audio process processing audio media file that is independent of primary processor entirely.Audio process is the independence on the function just, and is independent on hardware is realized simultaneously, thereby guarantees smoothness and audio stream efficiently.So, when the processing audio task, namely can use this special audio processor to be responsible for the audio media files decoding task.
Simultaneously, the realization of present embodiment also possesses the special interface unit of audio service that is, DAC(Digital-to-Analog Converter, digital analog converter) and I2S(Inter-IC Sound, integrated chip chamber sound) audio output interface such as interface, thereby the whole link that further complete audio frequency is handled.
The main realization principle of present embodiment is, uses the audio process that is independent of primary processor to handle corresponding media file.Link to each other by the inner high speed bus between primary processor and the audio process, and exchange transactions information.
So be that integral body has improved system performance, can guarantee other logic processing demands of primary processor simultaneously again.
Processor develops system-wide computing allotment and the logical OR computing business except the audio media files decoding task.These logical OR computing business comprise the allotment of each subsystem, task scheduling, and input and output namely distribute the relevant computing of audio frequency professional to corresponding audio process.
The full-time processing of being responsible for audio media files of audio process.When audio process needs the decoded audio media file at primary processor, accept the audio media files decoding task that primary processor distributes, and after decoding, in time return result.Simultaneously, can also directly export analogue audio frequency or carry out numeral output via the I2S interface via DAC, the processing that continues again of external chip/system.Thereby finish the scheduling of this processing demands.When new audio decoder service needed is arranged again, then accept the scheduling of primary processor again and re-execute above process.Need to prove that the audio task register of native system is in order to transmission tasks information and parameter between primary processor and audio process.
Present embodiment can be avoided the shortcoming of conventional audio processing mode well.Because it is very high that the real-time that audio frequency is handled requires, and when single processor is busy with other business or logic business, will be difficult to look after the real-time requirement of audio frequency.Even the mode by the hardware intervention realizes real-time by force, because processor needs frequent switch contexts, also will reduce the goodput of system greatly.
In order to adapt to various digital storage equipments better, and/or the Load System software code, native system also is equipped with CF card controller, SD/MMC controller, NAND controller, SM card controller etc., thus compatible subscriber equipment most possibly.
Native system can also include other logical blocks, comprises a plurality of communication buss, be used for linking up with external information, and exchanges data.The audio frequency output bus then is used for voice data is transported to external system.
Present embodiment be integrated all significant element of monolithic chip in the way of a unit, can also reduce the production run complexity significantly and simplify to produce.
The primary processor of present embodiment, audio process and miscellaneous part are encapsulated into a chip the inside in integrated circuit technique.Externally appear as one chip, and this system has only primary processor as the opening of the processor of native system, other then only externally provide DLL (dynamic link library) as audio process and other parts.Also be to start under the guiding at primary processor and run to a certain definite state when starting.Need to prove that the user still can and need do the configuration programming to audio process and miscellaneous part by primary processor, just as miscellaneous part being set various patterns.Just the concrete working procedure of this system and realization user need not also can't get involved.
System is in the guiding of primary processor with all ready under coordinating.For general business and logical process demand, primary processor is responsible for computing and is called necessary IO interface.Such as carrying out GPIO mirror operation result after the serial port command of introducing usefulness.
When system during at the processing audio media file, then assigned by primary processor and distribute the audio frequency Processing tasks to give audio process.The instruction of assigning includes but not limited to need to handle that section audio file, when handles, and how to handle result etc. after disposing.Such as, it is files in stream media and the broadcast that receives MP3 format from Ethernet that primary processor has an application task.Primary processor will use Ethernet interface to receive one section MP3 format files in stream media in this case, then this section audio media file is given audio process and required and handle at once, handle the back and export digital format with the I2S form from the I2S interface, perhaps from DAC converter output simulated audio signal etc.Same, this system also and be indifferent to who receives and use numeral or the simulated data of output outside the system.
The mode that assigns a task is the data structure of filling audio task, and deposits 32 internal memory first addresss of this data structure in the audio task register.Audio process monitors this audio frequency and appoints the address of register to have renewal then to take out mission bit stream at once, and handles according to the data structure of mission bit stream.
Simultaneously, when the user inserts the CF card, or the SD card, or system support other storage cards the time, system then calls corresponding the driving automatically, and finishes the storage to this memory device.Include but not limited to read audio media files, after decoding, externally export etc.And can arrange when being necessary by flash controller (NAND controller or NOR controller) and start or start from user's memory device SD/MMC from equipment flash memory, thereby finish special application needs.
Need to prove, need programme when the guiding of primary processor and operation, rather than hardware oneself is independently finished.Guiding and components of system as directed generally have processor producer to realize or assist realization, and intrasystem concrete application is then realized by the chip user.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion should belong within the protection domain of claim of the present invention all.
Claims (6)
1. based on the audio frequency processing system of SOC (system on a chip), it is characterized in that, comprise primary processor, audio process, audio output interface and audio file input interface, communicate by bus between primary processor, audio process, audio output interface and the audio file input interface; Described audio file input interface is used for to primary processor input audio media files decoding task; Described primary processor is used for and will distributes to audio process from the audio media files decoding task that the audio file input interface receives; Described audio process is used for the corresponding audio media files of audio media files decoding task of distributing is decoded, and carries out audio media files decoding output by audio output interface.
2. the audio frequency processing system based on SOC (system on a chip) as claimed in claim 1, it is characterized in that, should also comprise an audio task register that communicates with bus based on audio frequency processing system of SOC (system on a chip), it is used for preserving the audio media files decoding task that primary processor is distributed to audio process.
3. the audio frequency processing system based on SOC (system on a chip) as claimed in claim 1 is characterized in that, described audio file input interface comprises one or more in card controller, USB interface, the network interface.
4. the audio frequency processing system based on SOC (system on a chip) as claimed in claim 3 is characterized in that, described card controller comprises one or more in CF card controller, SD/MMC card controller, NAND card controller, the SM card controller.
5. the audio frequency processing system based on SOC (system on a chip) as claimed in claim 3 is characterized in that, described network interface is 802.3MAC interface or 802.11MAC interface.
6. the audio frequency processing system based on SOC (system on a chip) as claimed in claim 1 is characterized in that, described audio output interface comprises DAC and/or I2S interface.
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| CN105242972A (en) * | 2015-10-27 | 2016-01-13 | 赵立峰 | System and method for releasing computer resources |
| CN109346094A (en) * | 2018-09-06 | 2019-02-15 | 深圳市东微智能科技股份有限公司 | Processing method, terminal and the computer readable storage medium of audio |
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| CN102237090A (en) * | 2010-04-20 | 2011-11-09 | 安凯(广州)微电子技术有限公司 | Multimedia system on chip (SOC) and multimedia processing method thereof and multimedia device |
| CN203242351U (en) * | 2013-05-17 | 2013-10-16 | 深圳市奋达科技股份有限公司 | Audio processing system based on system on chip |
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Application publication date: 20130904 |