Audio Signal Processor with Independent Amplifier Segmentation
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Solution Overview
Problem
Existing audio signal processing methods for vehicles can reduce the effectiveness of voice guidance and warning sounds when they overlap with other audio sources, and users may adjust amplification ratios that affect these critical sounds.
Innovation Solution
An audio signal processor that includes amplifiers, mixers, and a setter to independently process and mix audio signals, ensuring the driver's seat remains a 'sweet spot' for critical audio content while allowing flexible amplification ratios for other audio content based on listener position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the amplification ratio between right and left channels is adjusted according to user preference or occupant presence, then the audio quality for general listeners is improved, but the effectiveness of voice guidance and warning sounds for the driver is reduced
Solution Approach 1:
The audio signal processing is divided into two independent paths: one for the first audio content (voice guidance and warning sounds) and another for the second audio content (general audio). The first amplifier processes the first audio content with fixed amplification amounts, while the second amplifier processes the second audio content with adjustable amplification ratios. This segmentation allows each path to have independent amplification control, resolving the contradiction between user-adjustable audio quality and driver warning effectiveness.
2Adaptability or versatility
If a single amplifier processes all audio content with adjustable amplification ratios, then user preference and occupant presence can be accommodated, but the driver seat cannot maintain a fixed sweet spot for critical audio content
Solution Approach 1:
The system uses two separate amplifiers: the first amplifier is dedicated to processing the first audio content (voice guidance and warning sounds) with fixed amplification amounts that maintain the driver seat as a sweet spot. The second amplifier processes the second audio content (general audio) with adjustable amplification ratios to accommodate user preference and occupant presence. This segmentation enables both fixed positioning precision and flexible adaptability simultaneously.
Solution Approach 2:
Different amplification characteristics are applied to different audio content types and different listening positions. The first amplifier provides fixed amplification for critical audio content to ensure optimal quality at the driver seat position. The second amplifier provides adjustable amplification for general audio content to accommodate various listener positions and preferences. This local quality differentiation resolves the contradiction between fixed sweet spot positioning and flexible adaptability.
Data Source
AI summary
An audio signal processor includes: a first amplifier that amplifies a first audio content; a mixer that mixes an output signal of the first amplifier and a second audio content; a second amplifier that amplifies an output signal of the mixer; and a setter that sets an amplification amount of the first amplifier. The setter sets an amplification amount in the first amplifier so that the amplification amount in the first amplifier cancels an amplification amount in the second amplifier.