Signal Processing Device for High-Quality Audio Synchronization
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Solution Overview
Problem
Existing call applications, such as Skype, struggle to consistently transmit high-quality sound during online music lessons due to fluctuating bandwidth, while specialized acoustic applications for high-quality sound transmission are not user-friendly for general purposes and lack video capabilities.
Innovation Solution
A signal processing method that synchronizes and delays acoustic signals received through different transmission paths to ensure high-quality sound output, using a combination of dedicated and general-purpose applications to minimize delay and maintain sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If general-purpose call applications are used for online music lessons, then ease of operation is improved, but sound quality deteriorates due to fluctuating bandwidth
Solution Approach 1:
The patent combines multiple reception units that receive acoustic signals through different transmission paths (including dedicated acoustic applications and general-purpose call applications) into a single processing system. The delay amount calculation unit processes signals from both paths together, and the delay amount addition unit integrates them with proper timing adjustment, merging the advantages of both specialized and general-purpose applications.
Solution Approach 2:
The patent introduces intermediary processing units (delay amount calculation unit and delay amount addition unit) that mediate between the different transmission paths. These intermediaries calculate delay amounts based on correlation between signals from different paths and apply appropriate delays to synchronize acoustic signals, enabling reliable sound quality while maintaining ease of operation through automated processing.
2Reliability
If specialized acoustic applications are used for high-quality sound transmission, then sound quality is improved, but ease of operation deteriorates due to limited functionality
Solution Approach 1:
The patent creates a universal processing system that handles both dedicated acoustic applications and general-purpose call applications through the same reception units and processing units. This multi-functional approach allows the system to provide high-quality sound transmission while maintaining compatibility with widely used applications, making it easy for users to operate without needing specialized software.
Solution Approach 2:
The patent merges the functionality of specialized acoustic applications with general-purpose call applications into a unified system. By combining multiple reception units and processing units that handle both application types through common delay calculation and addition mechanisms, the system achieves both high sound quality and broad usability.
3Reliability
If multiple transmission paths are used for acoustic signals, then sound quality is improved through redundancy, but device complexity increases
Solution Approach 1:
The patent implements self-service processing where the delay amount calculation unit automatically calculates delay amounts by analyzing correlation between acoustic signals from different transmission paths. The system self-adjusts timing without external intervention, and the delay amount addition unit automatically integrates signals with proper delays, reducing the need for complex manual configuration while maintaining high sound quality through multiple paths.
Data Source
AI summary
A signal processing method includes: receiving, by a first reception unit, an acoustic signal transmitted via a first transmission path, the acoustic signal received by the first reception unit being a first acoustic signal; receiving, by a second reception unit, the acoustic signal transmitted via a second transmission path different from the first transmission path, the second transmission path having a longer delay time for transmission than the first transmission path, and the acoustic signal received by the second reception unit being a second acoustic signal; calculating, by a delay amount calculation unit, a transmission delay amount that is a relative delay amount between the first acoustic signal and the second acoustic signal; and delaying, by a delay amount addition unit, the first acoustic signal based on the calculated transmission delay amount and outputting the delayed first acoustic signal.