CN102611478A - Digital interphone with sound recording function - Google Patents
Digital interphone with sound recording function Download PDFInfo
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- CN102611478A CN102611478A CN2012100744436A CN201210074443A CN102611478A CN 102611478 A CN102611478 A CN 102611478A CN 2012100744436 A CN2012100744436 A CN 2012100744436A CN 201210074443 A CN201210074443 A CN 201210074443A CN 102611478 A CN102611478 A CN 102611478A
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Abstract
The invention relates to a digital interphone with a sound recording function, wherein a radio frequency part consists of a transmitter, a receiver, a phase lock loop (PLL) and an antenna, a base band part consists of a high-performance processor ARM chip, a modulation demodulator, a flash memory and an audio processing chip, an audio part consists of an audio power amplification circuit, a microphone (MIC) and a loudspeaker, the modulation demodulator adopts a voice coding algorithm, the voice information is compressed to the speed rate being 2.4K, the ARM chip reads data stored in flashes according to selection, the voice is decoded through the modulation demodulator, the data is restored into voice, and digital signals are converted into analog signals through digital-to-analog (DA) conversation and are then output to the loudspeaker after being magnified through audio power amplification. The ARM chip reads data stored in the flashes, the data is transmitted out by the transmitter after the data coding regulation through the modulation demodulator, the voice coding algorithm is adopted, the occupied space of voice is effectively reduced, the recording time is prolonged, the voice quality is clear, the noise is low, the sound recoding content is displayed through the digital interphone, and can also be played and received by the interphone in a remote way.
Description
Technical field
The present invention relates to digital handset equipment, particularly a kind of digital handset that possesses sound-recording function.
Background technology
Intercom moves towards digitlization by simulation; Digital handset has simulation intercom not available advantage: the availability of frequency spectrum is higher, and type of call is abundant, supports to exhale, type of call such as group calling; Data service is abundanter; Support note, speech quality is more clear, and not along with distance increases and reduction etc.And China is carrying out nationwide digitlization transition, No. 666 files of Ministry of Industry and Information's issue in 2009, and the model that clear and definite digital handset began from 2011 to stop the simulation intercom is checked and approved.The intercom digitlization industry of China at hand.
Sound-recording function is applied in increasing occasion as special a kind of memory function.Intercom is as a kind of means of communication of specialty, uses also more extensively, as hotel, security protection, large-scale competitive sports, emergency communication commander etc., all be unable to do without the application of wireless talkback.Recording combines with wireless interspeaker, makes under various special environment, can the various information of real time record, and especially to than long and the authentic and valid reduction of key message ability.
Conventional recording can only be preserved voice document with audio format, it takes up room greatly; Record length is short, can not use conventional method to realize recording for a long time and preserving in the existing intercom, therefore; How on prior art, to have breakthrough, in existing digital handset, increase long-time sound-recording function, satisfy the user under various special environment; Can the various information of real time record, especially to reduction that can be authentic and valid than long and key message.The problem that has become those skilled in the art's research and solved.Existing market does not have this type of technical products to occur as yet, and this type of technological report is not arranged in the document as yet yet, so it has the huge space of development and development.
Summary of the invention
The object of the invention is exactly for overcoming the deficiency of prior art; A kind of digital handset design of supporting sound-recording function is provided; Make digital handset can support this machine sowing content that plays a record, support recording file to receive intercom and can receive the playback content through radio transmission.
The present invention realizes through such technical scheme: possess the digital handset of sound-recording function, comprise circuit, it is characterized in that, the digital handset circuit comprises radio frequency part, baseband portion, audio-frequency unit;
Wherein radio frequency part is made up of transmitter, receiver, phase-locked loop pll and antenna; Baseband portion is made up of high-performance processor ARM chip, modulator-demodulator, Flash memory, Audio Processing chip; Audio-frequency unit is by audio power amplifier circuit, and MIC and loud speaker constitute; The ARM chip connects Flash memory, modulator-demodulator and operation display part part respectively;
Modulator-demodulator is connected with Audio Processing chip, transmitter and receiver respectively; Phase-locked loop pll connects transmitter, receiver respectively, and transmitter, receiver and phase-locked loop pll are connected RF front-end circuit respectively, and RF front-end circuit connects antenna;
Modulator-demodulator adopts speech coding algorithm, and voice messaging is compressed to the speed of 2.4K, has effectively reduced speech and has taken up room, and makes record length prolong;
Under emission state; Speech gets into intercom through MIC, and the AD/DA circuit conversion through the Audio Processing built-in chip type is transformed to digital signal with analog signal; And speech coding is compressed through modulator-demodulator; To realize the compression of data, reduce memory space, and will deposit the data of data after the speech coding in the Flash memory through the ARM chip;
Under accepting state, modulator-demodulator carries out demodulation with the data that receive, and the data after the demodulation still for the data through speech coding, deposit these data in the Flash memory through the ARM chip then;
After the ARM chip read the data that deposit in the Flash memory, the process modulator-demodulator was launched through transmitter after carrying out the digital coding modulation;
The ARM chip is stored in data in the Flash memory according to selecting to read, and with tone decoding, is voice with reduction of data through modulator-demodulator, and through DA, is analog signal with digital signal conversion, exports loud speaker to after amplifying through audio power amplifier circuit then;
After the ARM chip read the data that deposit in the Flash memory, the process modulator-demodulator was launched through transmitter after carrying out the digital coding modulation, and long-range intercom receives signal, realized receiving and receiving broadcast.
Beneficial effect: the present invention adopts speech coding algorithm, and voice messaging is compressed to the speed of 2.4K, has effectively reduced speech and has taken up room, and makes record length prolong, and the voice coding/decoding algorithms that adopts, and speech quality is clear, and noise is few.And utilize the characteristic that intercom can wireless talkback, and make recording substance both put through this machine sowing, also can play and listen at long-range intercom.
Description of drawings
Fig. 1, hardware connect block diagram;
Fig. 2, Recording Process sketch map;
Fig. 3, this machine sowing content sketch map that plays a record;
Fig. 4, this machine recording substance emission sketch map;
Fig. 5, long-range intercom receive the playback sketch map.
Embodiment
Understand the present invention for clearer, describe the present invention in detail in conjunction with accompanying drawing and embodiment:
As shown in Figure 1, transmitter, receiver, phase-locked loop pll and antenna constitute; Transmitter is modulated to radiofrequency signal with voiceband data signal, and is launched by antenna through amplifying the back, and receiver is demodulated to voiceband data signal with the signal of receiving, phase-locked loop pll is that transmitter and receiver provides local oscillation signal.
The ARM chip of baseband portion adopt STM32F103ZCE, the modulator-demodulator of ST adopt SCT3252,, the Audio Processing chip adopts AIC3104; Audio-frequency unit adopts TDA8547 by audio power amplifier circuit;
Recording Process:
As shown in Figure 2, after recording started, whether processor A RM chip detection was emission or accepting state, and recording is only recorded to the sound that transmits and receives.
Emission Recording Process: under emission state; Speech gets into intercom through MIC, becomes conversion through AD, is digital signal by analog variation; And speech coding is compressed through modulator-demodulator; To realize the compression of data, reduce memory space, and will deposit the data of data after the speech coding in the Flash memory through the ARM chip.
Receive Recording Process: under accepting state, modulator-demodulator carries out demodulation with the data that receive, and the data after the demodulation still for the data through speech coding, deposit these data in the Flash memory through the ARM chip then.
As long as emission or reception do not finish, recording will continue always.Until sound-recording function is closed, End of Tape, the recording beginning is a recording section until the process that finishes.
This machine sowing process that plays a record:
As shown in Figure 3, after local playback function is opened, choose recording section after; Processor is stored in data in the Flash memory according to selecting to read;, be voice with reduction of data, and pass through DA tone decoding through modulator-demodulator; With digital signal conversion is analog signal, exports loud speaker to after amplifying through audio power amplifier circuit then.
Long-range intercom playback process:
Long-range intercom playback content is divided into 2 links, and first is local recording substance emission, and second is that long-range reception is play.
1) emission of this machine recording substance is as shown in Figure 4. after intercom read the data that deposit in the Flash memory, the process modulator-demodulator was launched through transmitter after carrying out the digital coding modulation.
2) it is as shown in Figure 5 that long-range intercom receives playback; After long-range intercom receives signal; At first carry out carrying out data demodulates through modulator-demodulator; Then the data that demodulate are carried out tone decoding, decoded signal converts analog signal into through DA again, and through exporting loudspeaker plays to after the audio frequency amplifier amplification.
According to above-mentioned explanation, can realize scheme of the present invention in conjunction with art technology.
Claims (2)
1. possess the digital handset of sound-recording function, comprise circuit, it is characterized in that, the digital handset circuit comprises radio frequency part, baseband portion, audio-frequency unit;
Wherein radio frequency part is made up of transmitter, receiver, phase-locked loop pll and antenna; Baseband portion is made up of high-performance processor ARM chip, modulator-demodulator, Flash memory, Audio Processing chip; Audio-frequency unit is by audio power amplifier circuit, and MIC and loud speaker constitute; The ARM chip connects Flash memory, modulator-demodulator and operation display part part respectively;
Modulator-demodulator is connected with Audio Processing chip, transmitter and receiver respectively; Phase-locked loop pll connects transmitter, receiver respectively, and transmitter, receiver and phase-locked loop pll are connected RF front-end circuit respectively, and RF front-end circuit connects antenna;
Modulator-demodulator adopts speech coding algorithm, and voice messaging is compressed to the speed of 2.4K, has effectively reduced speech and has taken up room, and makes record length prolong;
Under emission state; Speech gets into intercom through MIC, and the AD/DA circuit conversion through the Audio Processing built-in chip type is transformed to digital signal with analog signal; And speech coding is compressed through modulator-demodulator; To realize the compression of data, reduce memory space, and will deposit the data of data after the speech coding in the Flash memory through the ARM chip;
Under accepting state, modulator-demodulator carries out demodulation with the data that receive, and the data after the demodulation still for the data through speech coding, deposit these data in the Flash memory through the ARM chip then;
After the ARM chip read the data that deposit in the Flash memory, the process modulator-demodulator was launched through transmitter after carrying out the digital coding modulation;
The ARM chip is stored in data in the Flash memory according to selecting to read, and with tone decoding, is voice with reduction of data through modulator-demodulator, and through DA, is analog signal with digital signal conversion, exports loud speaker to after amplifying through audio power amplifier circuit then;
After the ARM chip read the data that deposit in the Flash memory, the process modulator-demodulator was launched through transmitter after carrying out the digital coding modulation, and long-range intercom receives signal, realized receiving and receiving broadcast.
2. the digital handset that possesses sound-recording function as claimed in claim 1 is characterized in that, the ARM chip adopts STM32F103ZCE, the modulator-demodulator of ST to adopt SCT3252, Audio Processing chip to adopt AIC3104, and audio power amplifier circuit adopts TDA8547.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100744436A CN102611478A (en) | 2012-03-21 | 2012-03-21 | Digital interphone with sound recording function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100744436A CN102611478A (en) | 2012-03-21 | 2012-03-21 | Digital interphone with sound recording function |
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| CN102611478A true CN102611478A (en) | 2012-07-25 |
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| CN2012100744436A Pending CN102611478A (en) | 2012-03-21 | 2012-03-21 | Digital interphone with sound recording function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401580A (en) * | 2013-08-09 | 2013-11-20 | 泉州市琪祥电子科技有限公司 | Voice recording and playing interphone |
| CN104469552A (en) * | 2014-11-03 | 2015-03-25 | 福建省南安市宝锋电子有限公司 | Intercom capable of self-defining and broadcasting channel name and self-defining method thereof |
| CN109120303A (en) * | 2018-10-23 | 2019-01-01 | 武汉中元通信股份有限公司 | A kind of communication radio station for parachuting |
| CN112511478A (en) * | 2021-02-04 | 2021-03-16 | 湖南国科锐承电子科技有限公司 | Voice storage and transmission device and method based on FPGA |
| CN112689223A (en) * | 2021-01-04 | 2021-04-20 | 重庆矢崎仪表有限公司 | Voice playing system and method for automobile combination instrument |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1049199A (en) * | 1996-08-02 | 1998-02-20 | Nec Corp | Silence compressed voice coding and decoding device |
| CN201491091U (en) * | 2009-07-21 | 2010-05-26 | 深圳市保利天同通讯设备有限公司 | Digital interphone |
| CN201789600U (en) * | 2010-07-14 | 2011-04-06 | 郑国忠 | Interphone |
-
2012
- 2012-03-21 CN CN2012100744436A patent/CN102611478A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1049199A (en) * | 1996-08-02 | 1998-02-20 | Nec Corp | Silence compressed voice coding and decoding device |
| CN201491091U (en) * | 2009-07-21 | 2010-05-26 | 深圳市保利天同通讯设备有限公司 | Digital interphone |
| CN201789600U (en) * | 2010-07-14 | 2011-04-06 | 郑国忠 | Interphone |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401580A (en) * | 2013-08-09 | 2013-11-20 | 泉州市琪祥电子科技有限公司 | Voice recording and playing interphone |
| CN104469552A (en) * | 2014-11-03 | 2015-03-25 | 福建省南安市宝锋电子有限公司 | Intercom capable of self-defining and broadcasting channel name and self-defining method thereof |
| CN109120303A (en) * | 2018-10-23 | 2019-01-01 | 武汉中元通信股份有限公司 | A kind of communication radio station for parachuting |
| CN112689223A (en) * | 2021-01-04 | 2021-04-20 | 重庆矢崎仪表有限公司 | Voice playing system and method for automobile combination instrument |
| CN112511478A (en) * | 2021-02-04 | 2021-03-16 | 湖南国科锐承电子科技有限公司 | Voice storage and transmission device and method based on FPGA |
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Application publication date: 20120725 |