Audio Bitstream Control Segment Disturbance Reduction
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Solution Overview
Problem
Audio disturbances, such as 'clicking' sounds or distortions, occur when control messages are processed as audio data in electronic devices, leading to a diminished user experience due to the integration of control bits with audio bits in bitstreams.
Innovation Solution
The system modifies the bitstream by inserting control segments with a preamble and control bits, using a delta-sigma modulator to change the oversampling frequency, and generates an audio sequence that estimates the bitstream without control segments to replace them, ensuring control bits are not processed by the audio digital-to-analog converter, thereby reducing audio disturbances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control messages are integrated into the audio bitstream, then device complexity is reduced and communication efficiency is improved, but audio disturbances such as clicking sounds and distortions occur
Solution Approach 1:
The patent extracts control bits from the audio bitstream by detecting them through preamble identification and removes them before audio conversion, preventing audio disturbances while maintaining integrated communication efficiency
Solution Approach 2:
The patent introduces a preamble as an intermediary signal that enables detection and separation of control messages from the audio bitstream, allowing control bits to be identified and removed without affecting audio quality
2Productivity
If control bits are transmitted within the audio band, then transmission efficiency is improved, but audio quality deteriorates due to noise and distortion
Solution Approach 1:
The patent moves control message transmission to a different dimension by using out-of-band frequencies above the audible range, allowing control bits to be transmitted without interfering with audio quality while maintaining transmission efficiency
3Quantity of substance
If oversampling frequency is increased to transmit control messages, then bandwidth is sufficient for control transmission, but audio signal quality deteriorates
Solution Approach 1:
The patent segments the bitstream into audio portions and control portions, allowing different processing strategies for each segment - high oversampling for control messages and optimized processing for audio signals, maintaining both bandwidth and quality
Data Source
AI summary
The embodiments described herein are directed to systems and methods for transmitting audio data and control segment in a single bitstream and reducing audio disturbance associated with the control segment when the bitstream is processed by an audio digital-to-analog converter. The system, according to one aspect, comprises a first audio unit, a transmitter coupled to the first audio unit, a receiver coupled to the transmitter, a second audio unit coupled to the receiver, a first processor coupled to at least one of the first audio unit and the transmitter, a second processor coupled to the second audio unit and the receiver, and an audio digital-to-analog converter connected to the second processor.