CN205584346U - Be applied to audio matrix device of many forms matrix - Google Patents
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Abstract
An embodiment of the utility model provides a be applied to audio matrix device of many forms matrix, a serial communication port, include: a plurality of be used for with audio signal convert into serial numeral audio signal audio frequency analog -to -digital conversion module, a plurality of be used for with audio signal separates to inlay to separate for serial numeral audio signal's audio frequency and inlays the module, a plurality ofly is used for selecting and modulating the multichannel serial digital audio signal's voice modulation FPGA, be used for with multichannel serial digital audio signal switches to video signal and modulation all the way all the way video signal switches FPGA, a plurality ofly is used for the demodulation for multichannel audio signal's audio frequency multichannel audio signal's audio frequency demodulation FPGA, a plurality of be used for with audio frequency digital analog conversion module and a plurality of that audio signal after the demodulation converted simulation audio signal into be used for with the analog audio signal adds the audio frequency that inlays and adds and inlay the module. The utility model has the characteristics of simple structure, the production of being convenient for, low cost etc.
Description
Technical field
This utility model embodiment relates to Audio Signal Processing technical field, particularly relates to a kind of audio matrix device being applied to multi-format matrix.
Background technology
In multi-format matrix, the video signal of input is varied, after being generally converted to form of the same race by interface chip, can only be completed the synchronism switching of video aspect by special switching chip.But in the occasions such as video conference, the input of voice data and switching, the Reliability comparotive of multi-format matrix is low, and autgmentability is the best.
Utility model content
This utility model embodiment provides a kind of audio matrix device being applied to multi-format matrix, to overcome above-mentioned technical problem.
This utility model is applied to the audio matrix device of multi-format matrix, including:
Multiple audio A/D modular converters for converting audio signals into serial digital audio signal, multiple for by audio frequency de-embedding module that described audio signal de-embedding is serial digital audio signal, multiple voice modulation FPGA for selecting and modulate serial digital audio signal described in multichannel, for described multi-path serial digital audio and video signals being switched to a road video signal and modulating the Audio conversion FPGA that a described road video signal is multipath audio signal, multiple audio demodulation FPGA for demodulating described multipath audio signal, multiple audio D/A modular converters for the audio signal after described demodulation being converted to simulated audio signal and multiple audio frequency embedding module for described simulated audio signal being carried out embedding.
Further, the model of described Audio conversion FPGA is M21163.
Advantage of the present utility model has the advantage that
1, transmit the compound series data transmission with modulation between the plate of audio frequency, be greatly saved interface quantity and PCB trace.Also improve the motility of transferring content simultaneously.
2, the handover operation of audio frequency completes in serial data aspect so that the few FPGA of amount of logic i.e. can complete fairly large Inverse problem function；Time division multiplex composite audio modulation /demodulation logic is the most extremely simple, therefore using cheap low side FPGA i.e. can meet the requirement of Audio Matrix system, the FPGA being simultaneously entered output board card can also increase the most rich and varied functions such as audio frequency effect process, audio delay, audio frequency characteristics value extraction.
3, Audio Matrix uses unified audio sync clock to ensure that the clean switching of the reliable of audio quality and audio frequency.
4, audio input output interface is user and provides the selection adding de-embedding and analog digital conversion so that the allocation plan of Audio Matrix is abundanter.It addition, this utility model also has simple in construction, it is simple to produce, the feature such as with low cost, be suitable to be widely popularized.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the audio matrix device structural representation that this utility model is applied to multi-format matrix；
Fig. 2 is the audio matrix device audio A/D modular converter circuit theory diagrams that this utility model is applied to multi-format matrix；
Fig. 3 is the audio matrix device audio frequency de-embedding modular circuit schematic diagram that this utility model is applied to multi-format matrix；
Fig. 4 is the audio matrix device voice modulation modular circuit schematic diagram that this utility model is applied to multi-format matrix.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Fig. 1 is the audio matrix device structural representation that this utility model is applied to multi-format matrix, as it is shown in figure 1, the device of the present embodiment may include that
Multiple audio A/D modular converters 102 for converting audio signals into serial digital audio signal, multiple for by audio frequency de-embedding module 101 that described audio signal de-embedding is serial digital audio signal, multiple voice modulation FPGA103 for selecting and modulate serial digital audio signal described in multichannel, for described multi-path serial digital audio and video signals being switched to a road video signal and modulating the Audio conversion FPGA104 that a described road video signal is multipath audio signal, multiple audio demodulation FPGA105 for demodulating described multipath audio signal, multiple audio D/A modular converters 106 for the audio signal after described demodulation being converted to simulated audio signal and multiple audio frequency embedding module 107 for described simulated audio signal being carried out embedding.
Further, the model of described Audio conversion FPGA is M21163.
Audio A/D modular converter circuit theory diagrams are as in figure 2 it is shown, audio frequency de-embedding module, voice modulation FPGA, Audio conversion FPGA, audio demodulation FPGA, audio D/A modular converter, audio frequency embedding module and connect the holding wire of each unit and synchronised clock line.Described audio A/D modular converter, audio frequency de-embedding module and voice modulation FPGA are positioned at the tablet of multi-format matrix；Audio conversion FPGA is positioned at the switch boards of multi-format matrix；Audio demodulation FPGA, audio D/A modular converter and audio frequency embedding module are positioned at the output board of multi-format matrix.Analogue audio frequency input connects the analog-to-digital conversion module of tablet, SDI or HDMI input connects de-embedding module, the DAB of both output is connected with input voice modulation FPGA, and many group dual-channel audios can be modulated to one group of serial data by voice modulation FPGA and be connected with the Audio conversion FPGA of switch boards.Audio frequency, from the modulating audio frequency of each tablet, is switched over according to switching table parallel opportunity by Audio conversion FPGA demodulation in serial aspect, and the voice data after switching is modulated to organize serial data more is connected with each output board.The audio demodulation FPGA demodulation of output board from the voice data of switch boards and distributes to audio D/A modular converter and audio frequency embedding module.Audio D/A modular converter output simulated audio signal, the output of audio frequency embedding module adds and is embedded with the SDI of audio frequency or HDMI video stream is supplied to user and uses.Multi-path digital audio compression is entered 1 high-frequency signal passage by voice modulation module.MCVF multichannel voice frequency switch unit, supports the switching of the up to 64 road high speed signals of 3Gbps.Physical circuit figure is as shown in Figure 4.As it is shown on figure 3, the sdi signal that this audio frequency de-embedding module supports SMPTE259/272/292/424 specification accesses, and solve the voice data being embedded in video blanking periods.
Simulated audio signal input is converted to 24 I2S serial digital audio, the input of SDI or HDMI signal by the audio A/D modular converter of tablet and is gone out 24 I2S serial digital audio by audio frequency de-embedding module de-embedding and utilize reference clock to carry out resampling process.Many groups are connected with voice modulation FPGA by the DABs of audio frequency de-embedding module, the output of audio A/D modular converter, and the highest 4 groups 24 or 6 groups of 16 dual-channel audios are selected by voice modulation FPGA and be modulated to 1 group of serial data to export the Audio conversion FPGA of switch boards.
Audio conversion FPGA demodulation is from the modulating audio frequency of all tablets, serial data aspect at DAB utilizes opportunity of audio frequency parallel clock according to switching table all audio frequency to switch over operation, and the voice data after switching is modulated to organize serial data more exports each output board.
The audio demodulation FPGA demodulation of output board from the voice data of Audio conversion FPGA and distributes to audio D/A modular converter and audio frequency embedding module.Audio D/A modular converter output simulated audio signal, the output of audio frequency embedding module adds SDI or the HDMI video stream being embedded with audio frequency.
Audio conversion FPGA obtain with output video homology audio sync clock and by external circuit distribution they arrive all tablets and output board, all audio signals are operated in identical clock zone.
The port number of the most each input and output daughter board can change flexibly, matrix maximum-norm can also freely adjust.
The audio A/D modular converter of the present embodiment, audio frequency de-embedding module, voice modulation FPGA, Audio conversion FPGA, audio demodulation FPGA, audio D/A modular converter and audio frequency embedding module can be realized by integrated circuit technology processing procedure or be realized by printed circuit board (PCB).
Advantage of the present utility model has the advantage that
1, transmit the compound series data transmission with modulation between the plate of audio frequency, be greatly saved interface quantity and PCB trace.Also improve the motility of transferring content simultaneously.
2, the handover operation of audio frequency completes in serial data aspect so that the few FPGA of amount of logic i.e. can complete fairly large Inverse problem function；Time division multiplex composite audio modulation /demodulation logic is the most extremely simple, therefore using cheap low side FPGA i.e. can meet the requirement of Audio Matrix system, the FPGA being simultaneously entered output board card can also increase the most rich and varied functions such as audio frequency effect process, audio delay, audio frequency characteristics value extraction.
3, Audio Matrix uses unified audio sync clock to ensure that the clean switching of the reliable of audio quality and audio frequency.
4, audio input output interface is user and provides the selection adding de-embedding and analog digital conversion so that the allocation plan of Audio Matrix is abundanter.It addition, this utility model also has simple in construction, it is simple to produce, the feature such as with low cost, be suitable to be widely popularized.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, it is not intended to limit；Although this utility model being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of this utility model each embodiment technical scheme.
Claims (2)
1. the audio matrix device being applied to multi-format matrix, it is characterised in that including:
Multiple audio A/D modular converters for converting audio signals into serial digital audio signal, multiple for by audio frequency de-embedding module that described audio signal de-embedding is described serial digital audio signal, multiple voice modulation FPGA for selecting and modulate serial digital audio signal described in multichannel, for described multi-path serial digital audio and video signals being switched to a road video signal and modulating the Audio conversion FPGA that a described road video signal is multipath audio signal, multiple audio demodulation FPGA for demodulating described multipath audio signal, multiple audio D/A modular converters for the audio signal after described demodulation being converted to simulated audio signal and multiple audio frequency embedding module for described simulated audio signal being carried out embedding.
Device the most according to claim 1, it is characterised in that the model of described Audio conversion FPGA is M21163.
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| CN201521133180.7U CN205584346U (en) | 2015-12-31 | 2015-12-31 | Be applied to audio matrix device of many forms matrix |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672831A (en) * | 2018-12-13 | 2019-04-23 | 北京计算机技术及应用研究所 | A kind of multichannel SDI high resolution audio and video mixed switching matrix |
| CN110351509A (en) * | 2018-04-03 | 2019-10-18 | 北京小鸟科技股份有限公司 | A kind of multichannel high band wide data exchange method stacked based on FPGA |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110351509A (en) * | 2018-04-03 | 2019-10-18 | 北京小鸟科技股份有限公司 | A kind of multichannel high band wide data exchange method stacked based on FPGA |
| CN110351509B (en) * | 2018-04-03 | 2021-12-14 | 北京小鸟科技股份有限公司 | Multi-channel high-bandwidth data exchange method based on FPGA (field programmable Gate array) stack |
| CN109672831A (en) * | 2018-12-13 | 2019-04-23 | 北京计算机技术及应用研究所 | A kind of multichannel SDI high resolution audio and video mixed switching matrix |
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