CN102082989A - ZigBee protocol-based all-digital wireless sound reinforcement device for teaching - Google Patents

ZigBee protocol-based all-digital wireless sound reinforcement device for teaching Download PDF

Info

Publication number
CN102082989A
CN102082989A CN2010105483202A CN201010548320A CN102082989A CN 102082989 A CN102082989 A CN 102082989A CN 2010105483202 A CN2010105483202 A CN 2010105483202A CN 201010548320 A CN201010548320 A CN 201010548320A CN 102082989 A CN102082989 A CN 102082989A
Authority
CN
China
Prior art keywords
used
zigbee
signal
connected
output
Prior art date
Application number
CN2010105483202A
Other languages
Chinese (zh)
Inventor
戴宁
Original Assignee
深圳市驭天健科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市驭天健科技有限公司 filed Critical 深圳市驭天健科技有限公司
Priority to CN2010105483202A priority Critical patent/CN102082989A/en
Publication of CN102082989A publication Critical patent/CN102082989A/en

Links

Abstract

The invention discloses a ZigBee protocol-based all-digital wireless sound reinforcement device for teaching, which comprises a transmitter and a receiver, wherein the transmitter comprises a microphone and a ZigBee transmission module connected with the microphone; the receiver comprises a ZigBee receiving module, an audio decoding circuit, an audio amplification circuit and a loudspeaker; the ZigBee receiving module is connected with the loudspeaker after sequentially passing through the audio decoding circuit and the audio amplification circuit; and the ZigBee transmission module is wirelessly connected with the ZigBee receiving module. The ZigBee protocol-based all-digital wireless sound reinforcement device for teaching has a simple structure, is convenient to use, and can realize teaching sound reinforcement by randomly connecting the transmitter and the receiver in all classrooms of a school.

Description

A kind of teaching based on the ZigBee agreement is with digital wireless public-address system

Technical field

The present invention relates to a kind of digital radio public-address system that is used to impart knowledge to students, especially adopt the ZigBee technology, have wireless automatic wireless public address set the sign indicating number and the inhibit feature of uttering long and high-pitched sounds.

Background technology

At present, the wireless public address equipment of generally acknowledging is the public-address system that adopts the radio frequency analog modulation, has characteristics with low cost.But this kind equipment is owing to adopt the analog-modulated technology, and general signal to noise ratio is not high, not automatically to code function, causes interchannel to crosstalk seriously simultaneously, when different receiving terminals are operated in same frequency, has a strong impact on the loudspeaker sound quality.

Summary of the invention

For the lower tone that overcomes existing wireless public-address system, the serious problem of crosstalking, the invention provides digital line public-address system based on the ZigBee wireless communication protocol, this device can not only realize that transmitting-receiving two-end is automatically to the function of sign indicating number, and can effectively resist channel disturbance, improve call tone quality, have the inhibition of uttering long and high-pitched sounds ability simultaneously.

The technical solution adopted for the present invention to solve the technical problems is: utilize the wireless radio-frequency of 2.4G to carry out the transmission and the reception of voice data, simultaneously, adopt the coupling routing mode to carry out the search of radio channel, adopt monophony high definition u-to lead the encoding and decoding that audio coding carries out audio signal.

Use audio code decode algorithm: algorithm is with 16bit, and the PCM signal encoding of 8k/16kHz is that u-leads audio coding.To guarantee that the speech quality definition under the data compression rate situation obtains maximum assurance.

Use independently developed wireless Routing Protocol: algorithm is on ZigBee protocol frame basis, and the transmitting-receiving matching method that exploitation has the Adaptive matching technology is searched available channel automatically, and be need not human intervention.

The Routing Protocol that use can be mated arbitrarily at sending and receiving end, different address.

The use inhibition algorithm of uttering long and high-pitched sounds: under extremely low algorithm complex condition, exploitation has the time-domain signal Processing Algorithm of the inhibit feature of uttering long and high-pitched sounds.

According to the detection of uttering long and high-pitched sounds of time domain statistical property, carry out the inhibition algorithm of uttering long and high-pitched sounds that volume is regulated simultaneously, finally reach high tone quality, ANTENN AUDIO sound amplification function at a distance.

The invention has the beneficial effects as follows, improve voice transfer tonequality, reduce the cross-interference issue of interchannel, simple in structure; Under the background of Radio Transmission Technology and the development of digital audio processing technology height, the user is more and more higher for the requirement of remote-wireless voice playing; The software and hardware system scheme of this project exploitation can effectively satisfy remote-wireless audio transmission demand; Under the condition that guarantees high speech intelligibility, has inhibit feature simultaneously to uttering long and high-pitched sounds significantly.Have voice collecting and transmitting terminal low-power consumption, small size, characteristics such as in light weight.

Description of drawings

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:

Fig. 1 represents the functional-block diagram of teaching of the present invention with the execution mode of public address set.

Embodiment

Shown in Figure 1, a kind of teaching based on the ZigBee agreement comprises a transmitting terminal 1 and that is used for audio signal sample and emission with digital wireless sound reinforcement system device and is used for the receiving terminal 2 that audio frequency receives and amplifies.

Its transmitting terminal 1 comprises: one is used for acoustical signal is converted to the signal picker 11 of the signal of telecommunication; One is used for analog electrical signal is converted to the A/D converter 12 of digital electric signal, is connected with the output of described signal picker 1; One be used to finish the acoustical signal coding speech coder 13, be connected with the output of described A/D converter 12; One is used to finish the inhibitor 14 of uttering long and high-pitched sounds of uttering long and high-pitched sounds and suppressing, and is connected with the output of described speech coder 13; One is used to finish the synthetic ZigBee Frame configurator 15 of ZigBee Frame, is connected with the output of described time-domain signal counter 14; One is used to realize that the ZigBee Frame sends and the radio-frequency (RF) transceiver 16 that receives, and is connected with described Frame configurator 15 outputs.

Its receiving terminal 2 comprises: one is used to realize that the ZigBee Frame sends and the ZigBee radio-frequency (RF) transceiver 21 that receives; One is used to finish the ZigBee Frame decoder 22 of ZigBee Frame decoding, sends with the output of the radio-frequency (RF) transceiver 21 that receives with described Frame to be connected; One is used to finish VoP decoded speech decoder 23, is connected with the output of described Frame decoder 22;

One is used to finish acoustical signal by the audio D/A converter 24 of digital signal to analog signal conversion, is connected with the output of described Voice decoder 23; One is used to finish audio-frequency power amplifier and the audio amplifier 25 that the acoustical signal audio signal is amplified, and is connected with the output of described audio D/A converter 24.

This device adopts the ZigBee wireless transmission protocol, and integrated ANTENN AUDIO is received and dispatched, time domain is uttered long and high-pitched sounds devices such as inhibition, wireless matched routings, and the high-quality public address solution at the ANTENN AUDIO transmission is provided.

1. on ZigBee agreement basis, the coupling routing algorithm of employing is realized any coupling of transmitting terminal and receiving terminal, and keeps between a plurality of receiving devices absence of audio to crosstalk.

2. adopt the time domain statistic algorithm, under extremely low algorithm complex condition, realize uttering long and high-pitched sounds significantly and suppress and the low-power consumption measuring ability.

Claims (3)

  1. One kind based on the teaching of ZigBee agreement with digital wireless public-address system, it is characterized in that: comprise that one is used for the transmitting terminal (1) of audio signal sample and emission, one is used for audio frequency receives and the receiving terminal (2) that amplifies.
  2. According to the described teaching based on the ZigBee agreement of claim 1 with digital wireless sound reinforcement system device, it is characterized in that:
    Its transmitting terminal comprises that one is used for acoustical signal is converted to the signal picker (11) of the signal of telecommunication;
    One is used for analog electrical signal is converted to the A/D converter (12) of digital electric signal, is connected with the output of described signal picker (11);
    One be used to finish the acoustical signal coding speech coder (13), be connected with the output of described A/D converter (12);
    One is used to finish the inhibitor of uttering long and high-pitched sounds (14) of uttering long and high-pitched sounds and suppressing, and is connected with the output of described speech coder (13);
    One is used to finish the synthetic ZigBee Frame configurator (15) of ZigBee Frame, is connected with the output of described time-domain signal counter (14);
    One is used to realize that the ZigBee Frame sends and the radio-frequency (RF) transceiver (16) that receives, and is connected with described Frame configurator (15) output.
  3. According to the described teaching based on the ZigBee agreement of claim 1 with digital wireless sound reinforcement system device, it is characterized in that:
    Its receiving terminal (2) comprises that one is used to realize that the ZigBee Frame sends and the ZigBee radio-frequency (RF) transceiver (21) that receives;
    One is used to finish the ZigBee Frame decoder (22) of ZigBee Frame decoding, sends with the output of the radio-frequency (RF) transceiver (21) that receives with described Frame to be connected;
    One is used to finish VoP decoded speech decoder (23), is connected with the output of described Frame decoder (22);
    One is used to finish acoustical signal by the audio D/A converter (24) of digital signal to analog signal conversion, is connected with the output of described Voice decoder (23);
    One is used to finish audio-frequency power amplifier and the audio amplifier (25) that the acoustical signal audio signal is amplified, and is connected with the output of described audio D/A converter (24).
CN2010105483202A 2010-11-17 2010-11-17 ZigBee protocol-based all-digital wireless sound reinforcement device for teaching CN102082989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105483202A CN102082989A (en) 2010-11-17 2010-11-17 ZigBee protocol-based all-digital wireless sound reinforcement device for teaching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105483202A CN102082989A (en) 2010-11-17 2010-11-17 ZigBee protocol-based all-digital wireless sound reinforcement device for teaching

Publications (1)

Publication Number Publication Date
CN102082989A true CN102082989A (en) 2011-06-01

Family

ID=44088710

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010105483202A CN102082989A (en) 2010-11-17 2010-11-17 ZigBee protocol-based all-digital wireless sound reinforcement device for teaching

Country Status (1)

Country Link
CN (1) CN102082989A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102547545A (en) * 2012-02-06 2012-07-04 杭州联汇数字科技有限公司 Device and method for amplifying classroom sound
CN106028227A (en) * 2016-07-08 2016-10-12 乐鑫信息科技(上海)有限公司 Distributed microphone array and sound source positioning system employing same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1293857A (en) * 1998-03-13 2001-05-02 艾利森电话股份有限公司 Communication device and method of operation
CN201336660Y (en) * 2008-04-30 2009-10-28 沈生祥 Multifunctional teaching microphone based on 2.4G digital wireless frequency modulation and shift

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1293857A (en) * 1998-03-13 2001-05-02 艾利森电话股份有限公司 Communication device and method of operation
CN201336660Y (en) * 2008-04-30 2009-10-28 沈生祥 Multifunctional teaching microphone based on 2.4G digital wireless frequency modulation and shift

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102547545A (en) * 2012-02-06 2012-07-04 杭州联汇数字科技有限公司 Device and method for amplifying classroom sound
CN106028227A (en) * 2016-07-08 2016-10-12 乐鑫信息科技(上海)有限公司 Distributed microphone array and sound source positioning system employing same

Similar Documents

Publication Publication Date Title
US7199706B2 (en) PLC intercom/monitor
CN101583996B (en) A method and noise suppression circuit incorporating a plurality of noise suppression techniques
US8300864B2 (en) Hearing aid system with a low power wireless link between a hearing instrument and a telephone
CN102201827B (en) Audio signal receiving and switching device and audio signal transmission system
US8417185B2 (en) Wireless headset and method for robust voice data communication
AU2009202121B8 (en) Low latency, high quality link for audio transmission
US6343217B1 (en) Digital cordless telephony with PCM coding
CN103312419B (en) Method and system for data communication based on audio or ultrasonic
US8923930B2 (en) Hearing assistive system with low power interface
CN102291205B (en) High-reliability data transmission method and device based on multi-frequency sound waves
US8233877B2 (en) Discontinuous reception of bursts for voice calls
CN1883126A (en) Non-wireless communication using sound
CN102394724B (en) Highly-reliable data transmission method and device based on dual tone multiple frequency sound waves
CN101689367A (en) Method and system to configure audio processing paths for voice recognition
CN203708487U (en) Bluetooth device with multifunctional coil
EP1887769A3 (en) Mobile communication terminal and method for inputting/outputting voice during playback of music data by using bluetooth
US20050186993A1 (en) Communication apparatus for playing sound signals
RU2010145146A (en) Wireless headphone missing between wireless networks
WO2004064443A3 (en) Two-way voice communication device having external acoustic noise reduction
CN101047408B (en) Digital radio microphone system
CN101247183B (en) Transmission device, receiving device, system and method for implementing communication based on ultrasonic wave
US20070168819A1 (en) Digital microphone
CN1307764A (en) Transmission of data by ultrasound
CN103138807B (en) Implement method and system for near field communication (NFC)
CN103560836A (en) Sound wave wireless communication method and device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: DAI NING TO: TU RONGFA

C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Inventor after: Tu Rongfa

Inventor before: Dai Ning

C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20110601