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Micro-control unit and DTMF alarm signal output method and system

A technology of micro-control unit and alarm signal, applied in the field of information transmission, can solve the problems of DTMF alarm signal distortion and alarm failure, and achieve the effect of improving the success rate of alarm

Active Publication Date: 2020-06-23
BYD CO LTD
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Problems solved by technology

[0004] The present invention provides a micro-control unit and a DTMF alarm signal output method and system to solve the technical problem of DTMF alarm signal distortion caused by in-band transmission after DTMF alarm signal compression, thereby leading to alarm failure in the prior art

Method used

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  • Micro-control unit and DTMF alarm signal output method and system
  • Micro-control unit and DTMF alarm signal output method and system
  • Micro-control unit and DTMF alarm signal output method and system

Examples

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example 1

[0031] In this example, pre-store the audio features of the DTMF alarm signal of the alarm signal (such as the shape feature of the frequency map, etc.), considering that the audio features of the noise signal are significantly different from the audio features of the DTMF alarm signal, therefore, in this embodiment In this method, the audio feature recognition is performed on the first alarm signal, and the audio whose dessert feature belongs to the audio feature of the preset DTMF alarm signal is extracted as the DTMF alarm signal.

[0032] Second example:

[0033] In this example, as figure 2 As shown, in this example, the DTMF alarm signal corresponding to the alarm signal sent by the alarm in the first alarm signal is extracted according to the preset extraction strategy, including:

[0034] Step 201: Sampling the second alarm signal according to a preset voice sampling frequency, and performing analog-to-digital conversion on the sampled alarm signal to obtain a third ...

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Abstract

The invention provides a micro-control unit and a DTMF alarm signal output method and system. The method comprises steps of: obtaining a first alarm signal sent by a DTMF encoder, and generating the first alarm signal by DTMF encoding of a second alarm signal sent by an alarm system controller by the DTMF encoder, wherein the second alarm signal comprises an alarm signal and a noise signal sent byan alarm; extracting a DTMF alarm signal corresponding to the alarm signal sent by the alarm in the first alarm signal according to a preset extraction strategy; and sending the DTMF alarm signal toa wireless communication module, so that the wireless communication module transmits the DTMF alarm signal to a wireless communication terminal in an out-of-band transmission mode. Therefore, on the basis that the DTMF alarm signal is not compressed, the DTMF alarm signal is transmitted in an out-of-band transmission mode, it is guaranteed that the DTMF alarm signal is not distorted, and the alarmsuccess rate is increased.

Description

technical field [0001] The invention relates to the technical field of information transmission, in particular to a micro control unit and a DTMF alarm signal output method and system. Background technique [0002] With the improvement of living standards, people have put forward higher requirements for the safety of personal and property at home. Compared with traditional wired alarms, wireless home alarms have a safer alarm method. In the case that the wired phone and the network are cut off, the advanced cellular network can be used to send an alarm message and make an emergency call. To provide users with reliable security. [0003] In related technologies, based on 2G wireless communication technology, and use voice channel (in-band) to transmit DTMF (Dual Tone Multi Frequency) alarm signal, on the one hand, in today's popularization of 3G wireless communication technology, if you want to upgrade to 3G , facing great challenges. On the other hand, the voice signal ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B25/08H04M7/12
CPCG08B25/08H04M7/1295
Inventor 姜博谦胡海丽
Owner BYD CO LTD
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