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Method and system for DTMF (dual tone multifrequency) decoding based on recording synchronization

A decoding method and sound data technology, applied in the field of DTMF decoding, can solve the problems of difficult decoding and increased cost, and achieve the effects of simple interaction, cost reduction, and good market application prospects

Active Publication Date: 2015-07-01
GUANGDONG ECAR TELEMATICS SERVICE
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Problems solved by technology

It aims to solve the problems of decoding difficulty and cost increase caused by the DTMF decoding technology of the existing technology adopting the program to be solidified into the chip

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  • Method and system for DTMF (dual tone multifrequency) decoding based on recording synchronization
  • Method and system for DTMF (dual tone multifrequency) decoding based on recording synchronization
  • Method and system for DTMF (dual tone multifrequency) decoding based on recording synchronization

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Embodiment Construction

[0037] The present invention provides a DTMF decoding method and system based on recording synchronization. In order to make the purpose, technical solution and effect 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.

[0038] see figure 1 , which is a flow chart of the DTMF decoding method based on recording synchronization of the present invention. As shown in the figure, the DTMF decoding method based on recording synchronization, wherein, comprises the following steps:

[0039] S1. Turn on the recording function according to the user's instruction, and collect the original sound data from the outside world at a sampling rate of 8K per second;

[0040] S2. Convert the collected original sound data into corresponding PCM signals, and restore them into DTMF codes ...

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Abstract

The invention discloses a method and a system for DTMF (dual tone multifrequency) decoding based on recording synchronization. Under an operating system of Andriod, Linux, WinCE or Windows, the method comprises the steps of collecting original voice data introduced from the outside world according to a sampling rate of 8K / s; converting the collected original voice data into corresponding PCM signals, and reverting the PCM signals into DTMF codes according to a preset sampling rate; and finally converting the DTMF codes into corresponding PCM signals, converting the PCM signals into corresponding analog signals, and outputting the analog signals through output equipment. A decoding chip does not need to be arranged additionally, thereby reducing the cost. Meanwhile, the method and the system disclosed by the invention can process complex DTMF codes, and is simple to interact with an upper application program, thereby having very good market application prospects.

Description

technical field [0001] The invention relates to the technical field of DTMF decoding, in particular to a recording synchronization-based DTMF decoding method and system. Background technique [0002] DTMF (Dual Tone MultiFrequency) is a dialing method in wired telephones. It is widely used in modern communication systems. Compared with pulse dialing, it has the advantages of fast speed, low error rate, and high connection rate. The DTMF principle is a coding technique that uses two specific single tone combined signals to represent digital signals to realize its functions. The frequencies of the two single tones are different, and the numbers they represent or the functions they implement are also different. Usually 16 keys, including 10 number keys 0-9 and 6 function keys *, #, A, B, C, D. According to the combination principle, generally there should be 8 different single audio signals. Therefore, there are 8 kinds of frequencies that can be used, which are called multi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/16H04M1/64
Inventor 王忠张小龙陈竹明吴蓉蓉
Owner GUANGDONG ECAR TELEMATICS SERVICE
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