Audio Playback Bus Format Switching for Host Compatibility
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Solution Overview
Problem
Some hosts' operation systems do not support the latest digital audio transmission port formats, preventing digital audio playback devices from functioning correctly.
Innovation Solution
An audio playback device and operation method that selects and responds with audio playback device information corresponding to different transmission bus formats, automatically switching to a secondary format if the primary format is not supported by the host, ensuring compatibility and continued operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the audio playback device uses the latest transmission bus format, then the transmission speed and audio quality are improved, but the compatibility with older hosts is worsened
Solution Approach 1:
The audio playback device dynamically switches between different bus format versions (first version and second version) based on host compatibility. The device initially uses the latest format for optimal performance, then detects host support status and transitions to an older format when incompatibility is detected, making the system adaptable rather than static
Solution Approach 2:
The device changes the bus format parameter (version number) based on detected host compatibility. When the host does not support the latest format, the device modifies its transmission parameter to use an earlier version, allowing compatibility while maintaining the capability to use newer formats when supported
2Adaptability or versatility
If the audio playback device supports multiple bus formats, then the compatibility is improved, but the device complexity increases
Solution Approach 1:
The bus format support is segmented into distinct versions (first version and second version), allowing the device to handle different format requirements separately. This segmentation enables selective activation of format versions based on host needs without requiring all formats to be simultaneously active, reducing overall complexity
Solution Approach 2:
The audio playback device is designed with multi-functionality to support multiple bus format versions through a single interface. Rather than requiring separate hardware interfaces for different formats, the device can operate in multiple format modes through software/firmware control, reducing physical complexity while maintaining versatility
Data Source
AI summary
An audio playback device operation method is provided. First audio playback device information corresponding to a first transmission bus format is selected to respond to a host according to a status descriptor request thereof. Whether an audio class-specific request command is received from the host is determined. When the audio class-specific request command is received, the response to the status descriptor request from the host is maintained. When the audio control feature unit descriptor request command is not received, the host is determined to not support the first transmission bus format. Second audio playback device information corresponding to a second audio bus transmission format is selected to response to the host according to the status descriptor request of the host such that when the audio class-specific request command is received, the response to the status descriptor request from the host is maintained.