DTMF Signal Encoding for Accurate Voice Call Data Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile phone users face difficulties in accurately transmitting numeric information during voice calls due to environmental noise and lack of a dual-tone multifrequency decoder in most mobile phones, leading to errors in recording and processing numbers.
Innovation Solution
A method and system that enables a sending terminal to encode input key information into dual-tone multifrequency information and transmit it alongside voice call audio, which is then decoded and processed by a receiving terminal to determine the type of information and perform corresponding operations, such as generating operation menus for numeric or non-numeric data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users manually record telephone numbers during voice calls, then information transmission is possible, but errors occur due to environmental noise and lack of paper/pencil
Solution Approach 1:
The patent replaces the mechanical manual recording system (paper and pencil) with an electronic dual-tone multifrequency decoding system. The receiving terminal automatically decodes DTMF signals from the voice call to extract numeric information, eliminating the need for manual writing and avoiding errors from environmental noise or forgetting to record.
2Device complexity
If mobile phones integrate only dual-tone multifrequency coder without decoder, then device complexity is reduced, but information reception capability is lost
Solution Approach 1:
The patent makes the receiving terminal multi-functional by integrating both DTMF coding and decoding capabilities. The terminal can both send information through DTMF signals and receive/decode DTMF signals from other terminals, enabling bidirectional information exchange during voice calls without requiring separate specialized devices.
3Reliability
If users use short message service to transmit numeric information, then accuracy is improved, but communication costs increase
Solution Approach 1:
The patent merges the information transmission function with the existing voice call channel. Instead of using separate short message services, the system transmits numeric information through DTMF signals embedded in the voice call audio stream, utilizing the already-established communication connection and avoiding additional messaging costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for accurate and error-free transmission of numeric information during voice calls, eliminating the need for paper recording and reducing the risk of errors, while also avoiding the costs associated with short message services.
Implementation Method 1
The dual-tone multifrequency represents one number through overlap of two frequency signals in a time domain. That is, the number is represented by overlapping a signal with higher frequency and a signal with lower frequency
Implementation Method 2
the decoder can identify the numbers 1, 2, 3 and 4, etc. input by the subscriber after converting the transmitted voices to the frequency domain
Data Source
AI summary
A method and system for processing information based on dual-tone multifrequency, and a receiving terminal are disclosed in the present document. The method includes: a sending terminal establishing a voice call with a receiving terminal; the sending terminal receiving input key information, encoding the key information into dual-tone multifrequency information, and transmitting the dual-tone multifrequency information and voice call audio information to the receiving terminal together; and the receiving terminal decoding and restoring the dual-tone multifrequency information to the key information; determining a type of the key information according to a preset key information judgment policy, and performing corresponding operations according to the key information.