Audio Data Transmission Phase Correction Using Movement Speed
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Solution Overview
Problem
Existing data transmission methods between computing devices without a shared network require specialized hardware and communicative pairing, and audio transmissions are susceptible to phase shifts due to device movement, causing interference and synchronization issues.
Innovation Solution
Implementing a system that uses audio transmissions with built-in speakers and microphones to transmit data without pairing, and corrects phase shifts by measuring differences between a first portion of the audio transmission and a predetermined sequence to estimate movement speed, adjusting the second portion based on this speed to account for interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If audio transmission is used for data transmission between computing devices, then specialized hardware and pairing are eliminated, but phase shifts occur due to device movement causing interference and synchronization issues
Solution Approach 1:
The patent applies preliminary action by inserting a known training sequence at the beginning of the audio transmission. This training sequence allows the receiving device to pre-calculate phase shift corrections based on expected signal characteristics before actual data transmission begins, enabling the system to compensate for device movement and maintain synchronization throughout the transmission
Solution Approach 2:
The patent implements feedback by continuously monitoring the received audio signal against the expected training sequence pattern. The receiving device calculates phase differences in real-time and uses this feedback to dynamically adjust synchronization, ensuring reliable data extraction even when devices move during transmission
2Measurement precision
If phase shift correction is implemented by comparing audio transmission to predetermined sequence, then synchronization accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent uses copying by creating a local copy of the expected training sequence at the receiving device. This reference copy is then compared against the received audio signal to detect phase shifts, simplifying the processing by using a known pattern rather than requiring complex analysis of the transmitted signal itself
Solution Approach 2:
The patent applies parameter changes by focusing the phase shift correction on specific characteristics of the audio signal (frequency, phase) rather than attempting to correct all signal parameters. This selective approach to parameter correction reduces processing complexity while maintaining adequate synchronization accuracy for data transmission
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
Enables data transmission without specialized hardware or pairing, and accurately corrects phase shifts to ensure proper data extraction, enhancing synchronization and processing accuracy.
Implementation Method 1
an audio transmission including symbols, at least a portion of the symbols corresponding to data modulated onto a carrier signal for transmission by the audio transmission
Implementation Method 2
identifying a phase difference between at least one of the first subset of symbols and at least one of the expected symbols
Implementation Method 3
correcting the second subset of symbols based on the movement speed between the transmitter and the receiver
Data Source
AI summary
Methods and systems for correcting distortions of audio transmissions are provided. In one embodiment, a method is provided that includes receiving an audio transmission that includes symbols. A first portion of the audio transmission including a first subset of the symbols may be identified and compared to an expected sequence having expected symbols. One or more differences may be determined between the first subset of the symbols and the expected symbols and a movement speed between a transmitter and a receiver of the audio transmission may be determined based on the differences. A second portion of the audio transmission may be identified including a second subset of the symbols in the second subset of the symbols may be corrected based on the movement speed between the transmitter and the receiver.