A method and system for decoding dtmf codes in an arm system

A technology of decoding and dialing numbers, applied in the field of DTMF decoding, can solve the problems of difficult maintenance and high cost, and achieve the effects of low maintenance cost, low manufacturing cost and strong maintainability

Active Publication Date: 2015-08-19
GUANGDONG ECAR TELEMATICS SERVICE
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Problems solved by technology

[0005] In view of above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of method and system of deciphering DTMF code in ARM system, aim to solve the problem that the cost of existing DTMF code method of deciphering DTMF code in ARM system is high, the problem that trouble is difficult to repair

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  • A method and system for decoding dtmf codes in an arm system
  • A method and system for decoding dtmf codes in an arm system
  • A method and system for decoding dtmf codes in an arm system

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Embodiment Construction

[0026] The present invention provides a method and system for deciphering DTMF codes in an ARM system. In order to make the purpose, technical solutions and effects of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] Such as figure 1 as shown, figure 1 Be the flow chart of the preferred embodiment of the method for solving DTMF code in ARM system of the present invention, as shown in the figure, it comprises steps:

[0028] S1. Connect the navigator to the mobile terminal through wireless communication, and start the business processing library when the user connects to the background through the mobile terminal;

[0029] S2. After the DTMF signal output on the navigator is amplified, it is input to the input port of the CPU, and the AD signal is sampled and...

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Abstract

The invention discloses a method and system for decoding DTMF in an ARM system. The method comprises the steps of carrying out wireless communication connection on a navigating instrument and a mobile terminal, starting a service processing library when a user is connected into a background through the mobile terminal, inputting DTMF signals output by the navigating instrument to the input port of a CPU after the DTMF signals are amplified, carrying out sampling and decoding on AD signals through an OAL layer, calling decoded processing data back to the service processing library, carrying out analysis on the processing data in the service processing library to obtain corresponding processing messages, and executing the processing messages of informing a person to open or close an headset microphone, issuing the points of information, issuing number dialed by the user or issuing background numbers.

Description

technical field [0001] The invention relates to the technical field of DTMF decoding, in particular to a method and system for decoding DTMF codes in an ARM system. Background technique [0002] DTMF (Dual Tone Multi Frequency), dual tone multi-frequency, consists of high frequency group and low frequency group, high frequency group and low frequency group each contain 4 frequencies, a high frequency signal and a low frequency signal are superimposed to form a combined signal, representing a number or other character. [0003] The traditional method of decoding DTMF signals is to solidify the program into the chip, and use a single-chip microcomputer or an advanced chip such as STM32 to decode the DTMF signal, which is called hard decoding. However, hard decoding is severely limited in the advanced ARM operating system, and will lead to an increase in R&D costs, manufacturing costs, waste of raw materials, and an increase in maintenance costs for follow-up products. Failure...

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Application Information

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IPC IPC(8): G06F9/44H04Q1/45
Inventor王忠张小龙陈竹明吴蓉蓉
OwnerGUANGDONG ECAR TELEMATICS SERVICE