Bluetooth Modulation Scheme Switching for High-Quality Audio
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Solution Overview
Problem
Bluetooth devices face challenges in receiving high-quality audio data due to limitations in existing modulation schemes, particularly when using the π/4 DQPSK scheme, which struggles to maintain desired bit rates for high-quality audio transmission.
Innovation Solution
The electronic device dynamically changes its modulation scheme from π/4 DQPSK to 8 DPSK, allowing for higher data rates by transmitting audio packets using the second codec, such as the UHQ codec, to improve audio quality and capacity during Bluetooth communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the π/4 DQPSK modulation scheme is used for Bluetooth communication, then the device can maintain stable connection and basic audio transmission, but the data transmission rate is insufficient for high-quality audio services
Solution Approach 1:
The patent implements dynamic modulation scheme switching, allowing the Bluetooth device to transition between π/4 DQPSK and 8 DPSK schemes based on real-time audio service requirements. The system dynamically selects the appropriate modulation scheme: using π/4 DQPSK for stable connection scenarios and 8 DPSK when high data rates are needed for high-quality audio, thus resolving the contradiction between connection stability and data transmission rate.
Solution Approach 2:
The patent changes the modulation scheme parameter from fixed π/4 DQPSK to a variable parameter that can switch between π/4 DQPSK and 8 DPSK. By modifying this key communication parameter based on audio service quality requirements, the system achieves both connection reliability and high data transmission rates when needed, effectively resolving the technical contradiction.
2Productivity
If the maximum size packet of π/4 DQPSK modulation scheme is used, then the device can transmit audio data with current capabilities, but it cannot achieve desired bit rate for high-quality audio data transmission
Solution Approach 1:
The system dynamically adjusts the modulation scheme based on the required audio quality and data rate. When high-quality audio transmission is needed, the system switches to 8 DPSK modulation which supports higher bit rates, thereby achieving both high audio data transmission capacity and high audio quality simultaneously.
Solution Approach 2:
The patent changes the modulation scheme parameter from π/4 DQPSK to 8 DPSK to increase the data transmission capacity. This parameter change enables the system to achieve the desired bit rate for high-quality audio data transmission while maintaining proper audio quality through the enhanced transmission capabilities.
3Productivity
If a modulation scheme with higher data rate is implemented, then high-quality audio transmission becomes possible, but the device complexity increases
Solution Approach 1:
The patent implements a dynamic modulation scheme that switches between π/4 DQPSK and 8 DPSK based on actual needs. Instead of always using the more complex 8 DPSK scheme, the system uses the simpler π/4 DQPSK when sufficient, and only transitions to 8 DPSK when high data rates are required. This dynamic approach achieves high data rates when needed while minimizing device complexity during normal operation.
Solution Approach 2:
The system changes the modulation scheme parameter dynamically rather than being fixed at a high-complexity setting. By adjusting the modulation parameter from π/4 DQPSK to 8 DPSK only when necessary for high-quality audio transmission, the system achieves high data rates while keeping the average device complexity manageable through selective parameter changes.
Data Source
AI summary
A method by an electronic device, includes: establishing a communication connection configured to use a first codec and a first modulation scheme for an audio service with an external electronic device; determining to use a second codec for reproducing a media file; transmitting, to the external electronic device, a first configuration message indicating the use of the second codec; after transmitting the first configuration message, receiving, from the external electronic device, a first change request message for a change from the first modulation scheme to a second modulation scheme; and transmitting, to the external electronic device, at least one audio packet generated using the second codec by using the second modulation scheme.