CN204406122U - Audio signal processor - Google Patents
Audio signal processor Download PDFInfo
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- CN204406122U CN204406122U CN201520112175.1U CN201520112175U CN204406122U CN 204406122 U CN204406122 U CN 204406122U CN 201520112175 U CN201520112175 U CN 201520112175U CN 204406122 U CN204406122 U CN 204406122U
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Abstract
The utility model discloses a kind of audio signal processor, this device comprises: audio collection cluster, MCU and the bridge be connected with described audio collection cluster and described MCU respectively, wherein, described audio collection cluster is for gathering multipath audio signal, and the multipath audio signal of collection is transferred to described bridge respectively, described multipath audio signal is converted to a road audio signal transmission to MCU by described bridge, carries out audio frequency process to make MCU to described sound signal.Audio signal processor of the present utility model can simply, easily by the transmission of sound signals of MIC array acquisition to MCU.
Description
Technical field
The utility model relates to audio signal processing technique field, is specifically related to a kind of audio signal processor.
Background technology
At present, voice application progressively throughout the every field of our life, as mobile phone, TV, vehicle-mounted, air-conditioning etc. field.Current speech recognition can obtain very outstanding experience performance under comparatively ideal environment, but the actual environment of actual life is not so desirable, such as dining room, Che Nei or remote use etc., because disturbing factor is more, make speech recognition experience greatly lower.And MIC array technique has developed for many years, had breakthrough especially in recent years, successfully can have been got rid of some disturbing factors in real-life situation by MIC array speech enhancement technique, thus greatly promoted speech recognition experience effect.But MIC array technique use cost is higher, array from the array of the simplest two MIC to tens MIC, sound is gathered owing to there being a lot of road MIC, and need the sound by so many MIC gather to give a MCU (Micro Control Unit, micro-control unit) process, method conventional at present adopts the MCU supporting multichannel voice frequency input, but such chip is little and expensive, and its interface quantity is very limited.
Utility model content
The utility model provides a kind of audio signal processor, with simply, easily by the transmission of sound signals of MIC array acquisition to MCU.
For this reason, the utility model provides following technical scheme:
A kind of audio signal processor, comprise: audio collection cluster, MCU and the bridge be connected with described audio collection cluster and described MCU respectively, wherein, described audio collection cluster is for gathering multipath audio signal, and the multipath audio signal of collection is transferred to described bridge respectively, described multipath audio signal is converted to a road audio signal transmission to MCU by described bridge, carries out audio frequency process to make MCU to described sound signal.
Preferably, described bridge is connected with described audio collection cluster by multiple musical audio digital interface, and is connected with MCU by an audio frequency data interface.
Preferably, described musical audio digital interface is following any one interface PCM, I
2s, TDMI.
Preferably, described audio collection cluster comprises multiple audio collection unit, and each audio collection unit is connected with described bridge each via a musical audio digital interface.
Preferably, the audio-frequency signal coding of collection is that digital data transmission gives described bridge by described audio collection unit.
Preferably, described audio collection cluster is MIC array.
Preferably, the road audio digital signals received from described bridge is reduced to multichannel voice frequency digital signal by described MCU.
Preferably, described bridge is CPLD or FPGA.
The audio signal transmission device that the utility model provides, is converted to a road audio signal transmission to MCU by bridge by the multipath audio signal of audio collection cluster collection, carries out audio frequency process to make MCU to described sound signal.The utility model advantage is compared with prior art:
(1) realize simply, bridge wherein, select CPLD or FPGA of a few resources just can realize;
(2) apply difficulty low, due to the switching by bridge, the audio digital signals that audio collection cluster exports only needs a musical audio digital interface to be transferred to MCU, simply too much compared with the audio collection unit of multichannel being accessed MCU respectively.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the present invention, for those of ordinary skill in the art, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the audio signal processor that the utility model provides.
Embodiment
In order to the scheme making those skilled in the art person understand the embodiment of the present invention better, below in conjunction with drawings and embodiments, the utility model embodiment is described in further detail.
As shown in Figure 1, be the structural representation of the audio signal transmission device that the utility model provides.
This device comprises: audio collection cluster 11, MCU12 and the bridge 13 be connected with described audio collection cluster 11 and described MCU12 respectively, wherein, described audio collection cluster 11 is for gathering multipath audio signal, and the multipath audio signal of collection is transferred to described bridge 13 respectively, described multipath audio signal is converted to a road audio signal transmission to MCU12 by described bridge 13, carries out audio frequency process to make MCU to described sound signal.
Particularly, MCU12 is after the road sound signal receiving bridge 13 transmission, multichannel voice frequency digital signal can be reduced to by Jiang Gai mono-road audio digital signals, so that follow-up various different application is to the process of voice signal, such as, in speech recognition, by effectively recognition effect can be improved to the identification of multi-path voice signal.
In actual applications, above-mentioned bridge 13 can be connected with described audio collection cluster 11 by multiple musical audio digital interface, and is connected with MCU12 by an audio frequency data interface.
Audio collection cluster 11 comprises multiple audio collection unit, such as, can be MIC array, and the road audio-frequency signal coding gathered is digital signal by each audio collection unit, and is transferred to bridge 13 by an above-mentioned musical audio digital interface.
Above-mentioned musical audio digital interface is any one interface following: PCM (Pulse Code Modulation, pulse code modulation (PCM)), I
2s (Inter-IC Sound, integrated circuit built-in audio bus), TDMI (Time Division Multiplexing Interface, time division multiplex interface).
Below with I
2s interface is example, and the transmitting procedure of the utility model audio signal processor to multipath audio signal is described.
I
2in S standard, both define hardware interface specification, also specify the form of digital audio-frequency data.I2S has 3 main signals:
1. serial clock SCLK, is also bit clock (BCLK), i.e. each data of corresponding DAB, and SCLK has 1 pulse.Frequency=2 × sample frequency × the sampling resolution of SCLK.
2. frame clock LRCK, (also claiming WS), for the data of switching right and left sound channel.For " 1 ", LRCK represents that what transmitting is the data of R channel, for " 0 " then represents that what transmitting is the data of L channel.The frequency of LRCK equals sample frequency.
3. serial data SDATA, exactly with the voice data that two's complement represents.
I
2no matter the signal of S form has how many valid data, and the most significant digit of data always appears at the 2nd SCLK pulse place after LRCK change (namely a frame starts).This just makes receiving end can be different from the number of significant digit of transmitting terminal.If the treatable number of significant digit of receiving end is less than transmitting terminal, low data unnecessary in Frame can be abandoned; If the treatable number of significant digit of receiving end is more than transmitting terminal, remaining position can be supplied voluntarily.This synchronization mechanism makes the interconnection of digital audio-frequency apparatus convenient, and data can not be caused to misplace.
In this embodiment, the codec that audio collection cluster 11 adopts support 2 road ADC to sample, sampling rate is 16k, and sampling precision is 24bit, adopts the codec that 6 such, can form the audio collection cluster on 12 tunnels, and wherein every 2 railway digital audio frequency are by an I
2s interface is transferred to bridge 13.
I
2the LRCLK (being labeled as CLK0) of S interface for 16k, BCLK (being labeled as CLK1) be 2*24*CLK0, each I
2s can transmit 2 circuit-switched data.6 I
2the data of S synthesize an I by bridge 13
2the data of S are by the I between bridge 13 and MCU12
2s interface transmits, then the I between bridge 13 and MCU12
2the LRCLK (being labeled as CLK2) of S interface is 6 times of CLK0, i.e. 96k, and BCLK is 2*24*CLK2.Like this, the data assemblies of 12 road 16k*24bit can have been become one group of I
2s data are transferred to MCU12, and this MCU12 only needs to support that 96k samples, the I of 24bit sampling precision
2s musical audio digital interface.
Visible, the audio signal transmission device that the utility model provides, by bridge, the multipath audio signal of audio collection cluster collection is converted to a road audio signal transmission to MCU, described bridge can need to design the interface that multiply digital signals is converted to a railway digital signal according to practical application, adopt some conventional programmable logic device (PLD) such as CPLD (Complex Programmable Logic Device, CPLD), FPGA (Field-Programmable Gate Array, field programmable gate array) etc. can realize.It realizes simple, and application difficulty is low, greatly reduces the use difficulty that hardware cost inputs frequently with the many recording of reduction simultaneously, also reduces the requirement to MCU simultaneously.
Being described in detail the utility model embodiment above, applying embodiment herein to invention has been elaboration, the explanation of above embodiment just understands device of the present utility model for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (8)
1. an audio signal processor, it is characterized in that, comprise: audio collection cluster, MCU and the bridge be connected with described audio collection cluster and described MCU respectively, wherein, described audio collection cluster is for gathering multipath audio signal, and the multipath audio signal of collection is transferred to described bridge respectively, described multipath audio signal is converted to a road audio signal transmission to MCU by described bridge, carries out audio frequency process to make MCU to described sound signal.
2. audio signal processor according to claim 1, is characterized in that, described bridge is connected with described audio collection cluster by multiple musical audio digital interface, and is connected with MCU by an audio frequency data interface.
3. audio signal processor according to claim 2, is characterized in that, described musical audio digital interface is following any one interface PCM, I
2s, TDMI.
4. audio signal processor according to claim 1, is characterized in that, described audio collection cluster comprises multiple audio collection unit, and each audio collection unit is connected with described bridge each via a musical audio digital interface.
5. audio signal processor according to claim 4, is characterized in that, the audio-frequency signal coding of collection is that digital data transmission gives described bridge by described audio collection unit.
6. audio signal processor according to claim 4, is characterized in that, described audio collection cluster is MIC array.
7. the audio signal processor according to any one of claim 1 to 6, is characterized in that, the road audio digital signals received from described bridge is reduced to multichannel voice frequency digital signal by described MCU.
8. the audio signal processor according to any one of claim 1 to 6, is characterized in that, described bridge is CPLD or FPGA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520112175.1U CN204406122U (en) | 2015-02-15 | 2015-02-15 | Audio signal processor |
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| CN201520112175.1U CN204406122U (en) | 2015-02-15 | 2015-02-15 | Audio signal processor |
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| CN204406122U true CN204406122U (en) | 2015-06-17 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106126186A (en) * | 2016-08-29 | 2016-11-16 | 北京声智科技有限公司 | A kind of multi-channel audio signal parallel acquisition device |
| WO2017045413A1 (en) * | 2015-09-15 | 2017-03-23 | 北京云知声信息技术有限公司 | Audio output method and apparatus |
| CN106681197A (en) * | 2015-11-11 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Electric locomotive traction controller state feedback device and system |
| CN107371092A (en) * | 2017-07-24 | 2017-11-21 | 北京智能管家科技有限公司 | A kind of microphone array signals processing system and method |
| CN109379674A (en) * | 2018-11-09 | 2019-02-22 | 福建星网智慧科技股份有限公司 | One kind realizing MCVF multichannel voice frequency polyplant and method based on CPLD |
| CN112218210A (en) * | 2019-07-09 | 2021-01-12 | 海信视像科技股份有限公司 | Display device, audio playing method and device |
| CN112703689A (en) * | 2021-01-30 | 2021-04-23 | 华为技术有限公司 | Data transmission method and device, electronic equipment and storage medium |
| CN113645540A (en) * | 2020-04-24 | 2021-11-12 | 矽统科技股份有限公司 | Digital audio array circuit |
| TWI747250B (en) * | 2020-04-24 | 2021-11-21 | 矽統科技股份有限公司 | Digital audio array circuit |
-
2015
- 2015-02-15 CN CN201520112175.1U patent/CN204406122U/en active Active
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017045413A1 (en) * | 2015-09-15 | 2017-03-23 | 北京云知声信息技术有限公司 | Audio output method and apparatus |
| CN106681197A (en) * | 2015-11-11 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Electric locomotive traction controller state feedback device and system |
| CN106681197B (en) * | 2015-11-11 | 2019-08-16 | 中车大连电力牵引研发中心有限公司 | Electric locomotive traction controller state feedback device and system |
| CN106126186A (en) * | 2016-08-29 | 2016-11-16 | 北京声智科技有限公司 | A kind of multi-channel audio signal parallel acquisition device |
| CN106126186B (en) * | 2016-08-29 | 2023-07-11 | 北京声智科技有限公司 | Multichannel audio signal parallel acquisition device |
| CN107371092A (en) * | 2017-07-24 | 2017-11-21 | 北京智能管家科技有限公司 | A kind of microphone array signals processing system and method |
| CN109379674A (en) * | 2018-11-09 | 2019-02-22 | 福建星网智慧科技股份有限公司 | One kind realizing MCVF multichannel voice frequency polyplant and method based on CPLD |
| CN109379674B (en) * | 2018-11-09 | 2024-02-06 | 福建星网智慧科技有限公司 | Device and method for realizing multipath audio aggregation based on CPLD |
| CN112218210B (en) * | 2019-07-09 | 2023-01-31 | 海信视像科技股份有限公司 | Display device, audio playing method and device |
| CN112218210A (en) * | 2019-07-09 | 2021-01-12 | 海信视像科技股份有限公司 | Display device, audio playing method and device |
| CN113645540A (en) * | 2020-04-24 | 2021-11-12 | 矽统科技股份有限公司 | Digital audio array circuit |
| US11399250B2 (en) | 2020-04-24 | 2022-07-26 | Silicon Integrated Systems Corp. | Digital audio array circuit |
| CN113645540B (en) * | 2020-04-24 | 2022-11-08 | 矽统科技股份有限公司 | Digital audio array circuit |
| TWI747250B (en) * | 2020-04-24 | 2021-11-21 | 矽統科技股份有限公司 | Digital audio array circuit |
| WO2022160312A1 (en) * | 2021-01-30 | 2022-08-04 | 华为技术有限公司 | Data transmission method and apparatus, and electronic device and storage medium |
| CN112703689B (en) * | 2021-01-30 | 2022-07-19 | 华为技术有限公司 | Data transmission method and device, electronic equipment and storage medium |
| CN112703689A (en) * | 2021-01-30 | 2021-04-23 | 华为技术有限公司 | Data transmission method and device, electronic equipment and storage medium |
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