Voice Channel Data Synchronization via Offset Compensation
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Solution Overview
Problem
Existing data transmission methods over voice channels in telephone communication systems face challenges in aligning data frames with voice frames, leading to distortion and inefficiency, especially in wireless telephone communication systems where synchronization is critical for accurate data extraction.
Innovation Solution
A method and system that determine an alignment offset between data frames and voice frames, allowing for precise timing adjustments to ensure data frames align with voice frames during transmission, using synchronization audio signals to calculate and compensate for any misalignment, thereby facilitating effective data communication over voice channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data frames are transmitted over voice channels without alignment adjustment, then transmission simplicity is maintained, but data distortion increases and transmission reliability deteriorates
Solution Approach 1:
The system performs preliminary synchronization by determining the alignment offset between data frames and voice frames before actual data transmission begins. This advance preparation ensures that subsequent data transmissions are properly aligned without requiring complex real-time adjustments during data transfer.
Solution Approach 2:
The system uses feedback mechanisms where the receiving end detects alignment offsets and communicates them back to the transmitting end. This feedback loop enables continuous synchronization adjustment, maintaining reliable data transmission over the voice channel by compensating for timing variations.
2Reliability
If alignment offset calculation and compensation mechanisms are implemented, then data transmission reliability improves, but processing time and system complexity increase
Solution Approach 1:
Alignment offset determination is performed in advance during an initialization phase before actual data transmission. This preliminary synchronization minimizes processing time during data transfer by pre-calculating the necessary timing adjustments.
Solution Approach 2:
The system calculates alignment offsets with higher precision than strictly necessary, using comprehensive synchronization signals that may exceed minimum requirements. This excessive action ensures robust synchronization that accounts for various timing variations without requiring repeated adjustments.
3Manufacturing precision
If synchronization signals are transmitted to determine alignment offset, then data frame alignment accuracy improves, but channel bandwidth consumption increases
Solution Approach 1:
The system transmits synchronization signals with characteristics that exceed minimum requirements for offset detection. These signals contain sufficient energy and duration to ensure accurate alignment offset determination even in challenging channel conditions, accepting increased bandwidth consumption as necessary for reliable synchronization.
Solution Approach 2:
The synchronization signals utilize specific parameter configurations including particular frequencies, durations, and energy levels optimized for reliable offset detection. By carefully selecting these parameters, the system achieves accurate synchronization while managing bandwidth consumption through efficient signal design.
Data Source
AI summary
Various embodiments facilitate data communication between a client device and a remote device over a voice channel of a telephone system. In one embodiment, the data communication over the voice channel is synchronized to align with voice frames utilized by the telephone system to transmit communicated data between the devices. In some embodiments, the synchronization is performed by determining an offset between a received synchronization audio signal and the voice frames used by the telephone system to process the synchronization audio signal, such as based on an amount of energy present in the received synchronization audio signal.