USB-C Audio Output Recognition to Prevent Speaker Sound Leakage
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Solution Overview
Problem
When an audio output device is connected through a USB Type-C connector to an electronic device, the recognition process is lengthened, leading to a sound leakage phenomenon where the audio signal is output through the speaker of the electronic device for a certain period.
Innovation Solution
The electronic device transmits in advance information necessary for recognizing the audio output device to the audio framework that processes audio signals, allowing for quicker recognition and activation of the audio output interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electronic device uses a USB Type-C connector to connect an audio output device, then the device can provide modern connectivity and audio output capability, but the recognition process lengthens causing sound leakage through the speaker
Solution Approach 1:
The electronic device performs preliminary actions by detecting the connection of the audio output device through the USB Type-C connector before fully switching the audio signal path. The processor detects the connection status and prepares the audio framework in advance, allowing for a smoother and faster transition without sound leakage through the speaker.
2Measurement precision
If the electronic device waits for complete recognition before switching audio output, then accurate device identification is achieved, but sound leakage occurs during the waiting period
Solution Approach 1:
The electronic device performs preliminary detection of the audio output device connection through the USB Type-C connector before completing the full recognition process. The processor initiates the audio framework setup and prepares the audio signal path switching in advance, reducing the period during which sound leakage could occur while maintaining accurate device identification.
3Speed
If the electronic device speeds up the audio output device recognition process, then sound leakage is reduced, but the audio framework may not be fully prepared for proper audio signal routing
Solution Approach 1:
The electronic device performs preliminary actions by detecting the audio output device connection and initiating the audio framework setup before completing the full recognition process. This allows the system to prepare necessary components and data structures in advance, enabling faster recognition while ensuring the audio framework is properly prepared for accurate audio signal routing.
Solution Approach 2:
The electronic device maintains continuous operation of the audio framework during the recognition process. The processor continuously monitors the recognition status and keeps the audio framework active and ready, ensuring that the transition from speaker output to audio output device is smooth and reliable without interruption or sound leakage.
Data Source
AI summary
Embodiments of an electronic device are disclosed. The electronic device may include a USB Type-C connector including at least one configuration channel (CC) pin and a processor operatively connected to the USB Type-C connector. The processor may be configured to: obtain first information of a connected audio output device by using a USB driver; transmit the first information and/or audio card information of the audio output device to an audio framework through a USB framework; control the audio framework to access an interface corresponding to the audio card information; and activate, when at least a portion of second information of the audio output device is obtained through the USB driver while accessing the interface, the interface by transmitting the at least a portion of the second information to the audio framework through the USB framework. Various additional embodiments in addition to the disclosed embodiments are possible.