Adaptive Bit-Rate Audio Recording for Multi-Device Synchronization
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Solution Overview
Problem
Wireless input/output devices experience sound cutoff and synchronization issues due to varying transmission environments, leading to degraded audio quality and synchronization challenges, particularly in weak electric fields.
Innovation Solution
An electronic device with a processor that adjusts the bit rate of audio data transmission based on the transmission environment, encoding audio data using higher bit rates in strong electric fields and lower bit rates in weak electric fields, and synchronizing audio data using a common index number.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of audio data is reduced to prevent sound cutoff in weak electric fields, then transmission reliability is improved, but audio quality is degraded
Solution Approach 1:
The patent applies dynamics by making the bit rate adjustable rather than fixed. The audio encoding system dynamically changes the bit rate based on transmission environment conditions (electric field strength), allowing it to adapt between high bit rates for good conditions (maintaining audio quality) and low bit rates for poor conditions (ensuring transmission reliability).
Solution Approach 2:
The patent changes the parameter of bit rate based on transmission environment. By monitoring electric field strength and adjusting the bit rate parameter accordingly, the system resolves the contradiction between transmission reliability and audio quality - using higher bit rates when reliable transmission is possible and lower bit rates when transmission conditions are poor.
2Device complexity
If a fixed bit rate and packet type are used in Bluetooth A2DP transmission, then device complexity is reduced, but adaptability to changing transmission environments is worsened
Solution Approach 1:
The system transitions from static fixed bit rate encoding to dynamic adaptive encoding. The encoder continuously monitors transmission conditions and adjusts bit rate and packet type accordingly, enabling the system to adapt to changing environments while maintaining manageable complexity through automated control.
Solution Approach 2:
The patent implements feedback by monitoring transmission environment conditions (electric field strength, transmission quality) and using this information to adjust encoding parameters. This closed-loop control system automatically adapts to environmental changes without requiring complex manual configuration or reconfiguration.
3Reliability
If different bit rates are used in left and right devices to handle varying transmission environments, then transmission reliability is improved, but synchronization between devices becomes more difficult
Solution Approach 1:
The system dynamically adjusts bit rates in left and right devices independently based on their respective transmission conditions, while maintaining synchronization through dynamic timestamp adjustment. This allows each device to optimize for its local environment while the system as a whole maintains temporal coherence.
Solution Approach 2:
The patent changes the timing parameter (timestamp) dynamically to compensate for different bit rate adjustments in left and right devices. By adjusting timestamps based on actual transmission conditions and arrival times, the system maintains synchronization stability even when bit rates differ between devices.
Data Source
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AI summary
Various embodiments of the present invention provide a method and a device, the device comprising a microphone, a communication module, a memory comprising a transmission buffer, and a processor operatively connected to the microphone, the communication module, or the memory, wherein the processor is configured to establish a connection of a first communication link with a first external electronic device through the communication module, establish a connection of a second communication link with a second external electronic device through the communication module, acquire a microphone input signal by operating the microphone upon reception of a recording request from the first external electronic device, monitor a transmission environment with the communication module or the second external electronic device, determine a bit rate of audio, based on the transmission environment, encode the audio, based on the determined bit rate, and transmit the encoded audio data to the first external electronic device. Various embodiments are possible.