CN209571228U - A kind of audio decoding circuit based on multi core chip - Google Patents
A kind of audio decoding circuit based on multi core chip Download PDFInfo
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- CN209571228U CN209571228U CN201821352252.0U CN201821352252U CN209571228U CN 209571228 U CN209571228 U CN 209571228U CN 201821352252 U CN201821352252 U CN 201821352252U CN 209571228 U CN209571228 U CN 209571228U
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Abstract
The utility model discloses a kind of audio decoding circuits based on multi core chip, chip and audio output module are handled including multicore, the multicore processing chip is provided with memory interface, the memory interface with external memory for being connected, the multicore processing chip is transmitted to audio output module for being decoded the audio raw data received to be converted to PCM audio data；The audio output module is for receiving PCM audio data and output audio signal.The utility model enables to audio decoding circuit to can parse multi-path audio-frequency data based on the audio decoding circuit of multi core chip by the way that multi core chip is arranged, and meets the needs of client's multichannel music；And the cost of the audio decoding circuit of the utility model is low, peripheral components are simple, easily facilitates implementation.
Description
Technical field
The utility model relates to a kind of audio broadcasting technology field more particularly to a kind of audio decoders based on multi core chip
Circuit.
Background technique
Currently, in middle-size and small-size broadcast system, MP3 music is often used, and the application of multichannel MP3 music
Demand is very universal.Traditional single core piece scheme realizes the soft decoding of MP3 all the way, has occupied most of runing time, remaining
Runing time, which needs to handle, applies logic, therefore realizes that the soft decoding of MCVF multichannel voice frequency is infeasible.So producing one kind to be suitable for
The lower-cost MCVF multichannel voice frequency decoding scheme of middle-size and small-size broadcast system becomes those skilled in the art's technology to be solved and asks
Topic.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of audios based on multi core chip
Decoding circuit is able to achieve the technical issues of MCVF multichannel voice frequency decodes.
The purpose of this utility model adopts the following technical scheme that realization:
A kind of audio decoding circuit based on multi core chip, including multicore processing chip and audio output module are described more
Core processing chip is provided with memory interface, and for the memory interface for being connected with external memory, the multicore handles chip
For being decoded the audio raw data received to be converted to PCM audio data, and it is transmitted to audio output module；Institute
Audio output module is stated for receiving PCM audio data and output audio signal.
Further, it is provided with FATFS file module in the multicore processing chip, the FATFS file module is used for
Audio raw data in reading external memory.
Further, the multicore processing chip includes decoding cache module, audio output cache module and processing module,
The decoding cache module and audio output cache module are electrically connected with processing module；
The decoding cache module is used to store the audio raw data of the external memory read, the processing module
For being decoded audio raw data to be converted to PCM audio data；The audio output cache module turns for storing
Change the PCM audio data of generation.
Further, the external memory is stored with multiple audio files, and the quantity of the decoding cache module is more
A, the quantity of the audio output cache module is multiple.
Further, the audio output module is analog-digital chip, and the audio raw data is former using MP3 audio
Beginning data.
Further, the model XL216-512-TQ128 of the multicore processing chip；The type of the audio output module
Number be WM8988.
Further, the external memory is SD card, and multicore processing chip is logical by SDIO hardware interface and SD card
Letter connection, the multicore processing chip are communicated to connect by IIS interface and audio output module.
Compared with prior art, the utility model has the beneficial effects that:
The utility model enables to audio solution by the way that multi core chip is arranged based on the audio decoding circuit of multi core chip
Code circuit can parse multi-path audio-frequency data, meet the needs of client's multichannel music；And the audio solution of the utility model
The cost of code circuit is low, peripheral components are simple, easily facilitates implementation.
Detailed description of the invention
Fig. 1 is the schematic block circuit diagram of the audio decoding circuit based on multi core chip of the utility model；
Fig. 2 is the circuit diagram of the audio decoding circuit based on multi core chip of the utility model.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
As depicted in figs. 1 and 2, a kind of audio decoding circuit based on multi core chip, including multicore are present embodiments provided
Chip and audio output module are handled, the multicore processing chip includes decoding cache module, audio output cache module and place
Module is managed, the decoding cache module and audio output cache module are electrically connected with processing module；The multicore handles core
Piece is provided with memory interface, and for being connected with external memory, the general external memory uses the memory interface
SD card stores information by SD card, and in the present embodiment, the external memory is stored with multiple audio files, but its
Also it can store single audio file, but for for single audio file, existing mode is all such realization, so
It does not need to be described in detail for it；But be directed in memory and be stored with multiple audio files, and read simultaneously
Mode in existing mode there is no existing, so in the present embodiment only in storing multiple audio files in memory
To be described.Due to needing to read the audio raw data in multiple audio files, so need in multicore processing chip
Multiple decoding cache modules are set, and the decoding cache module is used to store the audio original number of the external memory read
According to it mainly passes through FATFS file module in reading external memory when carrying out external memory data reading
Audio raw data.Audio raw data is MP3 initial data in the present embodiment.
The audio raw data received for being decoded to be converted to pcm audio number by the multicore processing chip
According to, and it is transmitted to audio output module；The audio output module is for receiving PCM audio data and output audio signal.Institute
Processing module is stated for being decoded audio raw data to be converted to PCM audio data；The audio output cache module
The PCM audio data generated for storing conversion.The quantity of the audio output cache module is multiple.It is arranged herein multiple
Decoding cache module is the mp3 file read line since the reading speed of mp3 file is played much higher than MP3 decoding and audio
The mp3 file that journey can execute every road MP3 decoding thread by timesharing sequence is read, and transmission is stored in corresponding MP3 decoding respectively
In caching.Have benefited from handling chip multicore architecture, will not be influenced by operational performance between each MP3 decoding thread, it can be with chip
The most fast arithmetic speed of thread executes MP3 decoding；It is defeated that corresponding audio is stored in after MP3 decoding thread generation PCM audio data
Out in caching.
As shown in Fig. 2, the model XL216-512-TQ128 of the multicore processing chip；Use this in the present embodiment
The chip model of sample, but be not restricted to that this model, it can also be using the chip of the different series of the producer, it might even be possible to adopt
With the chip of different manufacturers, as long as can be realized the processing of multi core chip.And this electricity that multicore processing chip part is
The core on road, is connected to SD card and audio output module；, according to physical circuit, those skilled in the art can be brighter
The corresponding peripheral circuit of true setting.
Multicore processing chip is communicated by SDIO hardware interface with SD card, searches MP3 in SD card using FATFS file system
File simultaneously reads MP3 initial data；By software MP3 decoding algorithm process MP3 initial data, it is converted into PCM format audio number
According to；Pcm audio numerical data is exported to audio output chip by IIS interface, and exports analog audio signal；The audio is defeated
The model WM8988 of module out.The external memory is SD card, and multicore processing chip passes through SDIO hardware interface and SD
Cartoon letters connection, the multicore processing chip are communicated to connect by IIS interface and audio output module.Due to existing decoding scheme
Cost And Performance it is limited, a kind of soft decoding scheme of multi-core single chip audio of the utility model (is less than using a 16 core pieces
40 yuan), it realizes the soft decoding of MCVF multichannel voice frequency, while meeting the operation using logic, have that at low cost, peripheral components are simply excellent
Point.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (5)
1. a kind of audio decoding circuit based on multi core chip, which is characterized in that handle chip and audio output mould including multicore
Block, the multicore processing chip are provided with memory interface, and the memory interface with external memory for being connected, the multicore
The audio raw data received for being decoded to be converted to PCM audio data by processing chip, and it is defeated to be transmitted to audio
Module out；The audio output module is set in the multicore processing chip for receiving PCM audio data and output audio signal
It is equipped with FATFS file module, the FATFS file module is for the audio raw data in reading external memory；
The multicore processing chip includes decoding cache module, audio output cache module and processing module, the decoding caching
Module and audio output cache module are electrically connected with processing module；
The decoding cache module is used to store the audio raw data of the external memory read, and the processing module is used for
Audio raw data is decoded to be converted to PCM audio data；The audio output cache module is for storing conversion life
At PCM audio data.
2. as described in claim 1 based on the audio decoding circuit of multi core chip, which is characterized in that the external memory is deposited
Contain multiple audio files, the quantity of the decoding cache module be it is multiple, the quantity of the audio output cache module is more
It is a.
3. the audio decoding circuit based on multi core chip as described in any one of claim 1-2, which is characterized in that described
Audio output module is analog-digital chip, and the audio raw data uses MP3 audio raw data.
4. the audio decoding circuit based on multi core chip as described in any one of claim 1-2, which is characterized in that described
The model XL216-512-TQ128 of multicore processing chip；The model WM8988 of the audio output module.
5. as claimed in claim 4 based on the audio decoding circuit of multi core chip, which is characterized in that the external memory is
SD card, and multicore processing chip is communicated to connect by SDIO hardware interface and SD card, the multicore processing chip passes through IIS interface
It is communicated to connect with audio output module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821352252.0U CN209571228U (en) | 2018-08-21 | 2018-08-21 | A kind of audio decoding circuit based on multi core chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821352252.0U CN209571228U (en) | 2018-08-21 | 2018-08-21 | A kind of audio decoding circuit based on multi core chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065061A (en) * | 2018-08-21 | 2018-12-21 | 广州市保伦电子有限公司 | A kind of audio decoding circuit and method based on multi core chip |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065061A (en) * | 2018-08-21 | 2018-12-21 | 广州市保伦电子有限公司 | A kind of audio decoding circuit and method based on multi core chip |
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Address after: No. 56 Nanli East Road, Shiqi Town, Panyu District, Guangzhou City, Guangdong Province, 510000 Patentee after: Guangdong Baolun Electronics Co.,Ltd. Address before: 511400 Building 1, industrial zone B, Zhongcun street, Zhongcun street, Panyu District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU ITC ELECTRONIC TECHNOLOGY Co.,Ltd. |