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DTMF encoding and decoding method, encoder, decoder and communication device

A technology of encoding method and decoding method, applied in the field of dual-tone multi-frequency communication, can solve problems such as error reporting and over-reporting, etc.

Pending Publication Date: 2021-05-04
SIMCOM WIRELESS SOLUTIONS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of DTMF encoding, decoding method, encoder, decoder and communication device in order to overcome the defects of error reporting and multi-reporting that are prone to occur when DTMF is in the transmission process in the prior art

Method used

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  • DTMF encoding and decoding method, encoder, decoder and communication device
  • DTMF encoding and decoding method, encoder, decoder and communication device
  • DTMF encoding and decoding method, encoder, decoder and communication device

Examples

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Embodiment 1

[0052] like figure 1 As shown, the present embodiment provides a kind of DTMF coding method, and this DTMF coding method comprises:

[0053] S101. Obtain digital information to be sent;

[0054] S102. Convert digital information to be sent into a frequency signal;

[0055] S103. Generate a preset high-frequency signal;

[0056] S104. Superimposing the frequency signal and the high frequency signal to form a target sending signal;

[0057] S105. Convert the target sending signal from a digital signal to an analog signal;

[0058] S106. Send the target to send a signal.

[0059] Specifically, the frequency of the preset high-frequency signal is greater than or equal to 10 KHz.

[0060] It is well known in the art that DTMF only needs two frequency points to lock a character in the process of encoding and decoding, which is relatively simple and efficient, such as figure 2 As shown, the character "6" is locked by 770Hz and 1477Hz. When DTMF is transmitted by voice, the fr...

Embodiment 2

[0063] like Figure 4 As shown, the present embodiment provides a kind of DTMF decoding method, and this DTMF decoding method comprises:

[0064] S201. Receive a signal to be decoded;

[0065] S202. Convert the signal to be decoded from an analog signal to a digital signal;

[0066] S203. Detect whether the transmitted signal to be decoded includes a preset high-frequency signal, if yes, perform step S204, and if not, perform step S205;

[0067]S204. Decode the signal to be decoded to obtain the target digital information, and output the target digital information; the process ends.

[0068] S205. Outputting the abnormality of the signal to be decoded to remind further processing, for example, the decoding of the signal to be decoded may be abandoned.

[0069] The DTMF coding method of the present embodiment first detects whether a high-frequency anti-jamming signal is mixed in the frequency signal, only when the frequency signal includes a high-frequency anti-jamming signa...

Embodiment 3

[0071] This embodiment provides a kind of DTMF communication method, this DTMF communication method utilizes the DTMF coding method in the embodiment 1 to encode the digital information to obtain the transmission signal, and then utilizes the DTMF decoding method in the embodiment 2 to decode the transmission signal to obtain the digital information.

[0072] The DTMF communication method of the present embodiment, by mixing the anti-jamming signal of high frequency in the frequency signal to be sent, the probability that DTMF is interfered in the transmission process is greatly reduced; The anti-jamming signal is detected, and only when the frequency signal includes a high-frequency anti-jamming signal is it decoded, which effectively reduces false positives and false negatives caused by signal interference.

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Abstract

The invention discloses a DTMF encoding method, a DTMF decoding method, an encoder, a decoder and a communication device. The DTMF coding method comprises the following steps: acquiring digital information to be sent; converting the digital information to be sent into a frequency signal; generating a preset high-frequency signal; superposing the frequency signal and the high-frequency signal to form a target sending signal; and sending the target sending signal. The high-frequency anti-interference signal is mixed into the DTMF frequency signal to be sent, so the probability that the DTMF is interfered in the transmission process is greatly reduced, and the situations of false alarm and error alarm caused by interference of the signal are effectively reduced.

Description

technical field [0001] The present invention relates to the technical field of dual-tone multi-frequency communication, in particular to a DTMF (Dual Tone Multi-Frequency, dual-tone multi-frequency) encoding and decoding method, encoder, decoder and communication device. Background technique [0002] DTMF is a method of expressing numbers with tones in voice channels, and can be used to transmit signaling in analog voice channels, so it is widely used in the communication field. DTMF consists of a high frequency group and a low frequency group. The high and low frequency groups each contain 4 frequencies. A high frequency signal and a low frequency signal are superimposed to form a combined signal, representing a number. [0003] During the popularization of the Internet of Things, communication devices are no longer limited to communication devices such as mobile phones. More and more devices support voice calls. Daily devices such as vending machines, cars, and even elevat...

Claims

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Application Information

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IPC IPC(8): H04M7/12
CPCH04M7/1295
Inventor 马洪刚
Owner SIMCOM WIRELESS SOLUTIONS SHANGHAI
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