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Digital interphone with sound recording function

A digital walkie-talkie and functional technology, which is applied in speech analysis, two-party line system stations, instruments, etc., to achieve clear voice quality, reduce voice occupation space, and prolong recording time

Inactive Publication Date: 2012-07-25
TIANJIN 712 COMM & BROADCASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no such technical product in the market, and there is no report of this kind of technology in the literature, so it has a huge space for research and development

Method used

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  • Digital interphone with sound recording function
  • Digital interphone with sound recording function
  • Digital interphone with sound recording function

Examples

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Embodiment Construction

[0021] In order to understand the present invention more clearly, describe the present invention in detail in conjunction with accompanying drawing and embodiment:

[0022] Such as figure 1 As shown, the transmitter, receiver, phase-locked loop PLL and antenna are composed; the transmitter modulates the audio data signal into a radio frequency signal, and transmits it through the antenna after amplification, and the receiver demodulates the received signal into an audio data signal , The phase-locked loop PLL provides the local oscillator signal for the transmitter and receiver.

[0023] The ARM chip of the baseband part adopts ST's STM32F103ZCE, the modem adopts SCT3252, and the audio processing chip adopts AIC3104; the audio part adopts TDA8547 in the audio power amplifier circuit;

[0024] Recording process:

[0025] Such as figure 2 As shown, after the recording is started, the processor ARM chip detects whether it is in the transmitting or receiving state, and the rec...

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PUM

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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 [0001] The invention relates to digital walkie-talkie equipment, in particular to a digital walkie-talkie with recording function. Background technique [0002] Walkie-talkies are moving from analog to digital. Digital walkie-talkies have advantages that analog walkie-talkies do not have: higher spectrum utilization, rich call types, support for individual calls, group calls and other call types, richer data services, support for text messages, and clearer voice quality , and does not decrease with increasing distance. Moreover, China is undergoing a nationwide digital transition. The Ministry of Industry and Information Technology issued Document No. 666 in 2009, clarifying that digital walkie-talkies have stopped model approval for analog walkie-talkies since 2011. China's walkie-talkie digital industry is coming. [0003] As a special storage function, the recording function is used in more and more occasions. As a professional means of communic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40G10L19/00G10L19/008H04Q5/24
Inventor 王伟李辉辉张键黄振华康保亮刘武超郝磊磊王远吴希
Owner TIANJIN 712 COMM & BROADCASTING CO LTD
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