Sound Recording Device Microphone Type Determination
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Solution Overview
Problem
Conventional sound recording devices inaccurately determine the type of connected external microphones based solely on impedance, leading to inappropriate adaptations.
Innovation Solution
A sound recording device with a connector having multiple terminals and a determiner that uses signal correlations between specific terminals to accurately identify the type of connected external microphones, employing a dedicated-microphone detection process to differentiate between dedicated and general microphones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If impedance-based determination is used to identify external microphone types, then the device can adapt to multiple audio apparatuses using a single jack interface, but the determination accuracy deteriorates leading to inappropriate adaptations
Solution Approach 1:
The patent transitions from one-dimensional impedance-based identification to multi-dimensional signal correlation analysis. By examining correlation values between multiple terminal signals (terminal 202, 203, 204) rather than relying on a single impedance measurement, the system achieves more accurate microphone type determination while maintaining universal jack interface compatibility
Solution Approach 2:
The patent changes the identification parameter from impedance alone to a combination of signal correlation values from multiple terminals. The determiner calculates correlation between signals at different terminals and uses these multi-parameter correlations to accurately distinguish between dedicated microphones and general microphones, resolving the inaccuracy of impedance-based methods
Data Source
AI summary
A sound recording device of the present disclosure is can be connected with an external sound pickup device. The sound recording device includes a connector having a plurality of terminals to which the external sound pickup device can be connected, and a determiner that determines a type of the external sound pickup device when the external sound pickup device is connected to the connector, based on a correlation between signals of specific terminals out of the plurality of terminals.