Audio Apparatus Automatic Channel Mapping via Test Tone Analysis
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Solution Overview
Problem
In home theater systems, users often struggle to accurately connect audio signals to corresponding speakers, leading to improper audio reproduction due to the lack of effective channel mapping and spatial speaker positioning.
Innovation Solution
An audio system that includes a controller and sound generator to automatically map channels by using test tone signals with time differences, allowing for correct routing of multichannel audio signals to the appropriate speakers, even when speakers are randomly connected to output terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users manually connect audio signals to speakers, then connection accuracy depends on user skill, but the process becomes complex and error-prone
Solution Approach 1:
The system performs automatic channel mapping without requiring user intervention. The audio apparatus autonomously generates test tones, receives signals from speakers, determines spatial locations, and maps channels to speakers automatically, eliminating manual connection errors and simplifying the user process.
Solution Approach 2:
The system performs preliminary channel mapping before actual audio playback. By预先 generating test tones and establishing speaker connections in advance, the system ensures accurate channel-s speaker correspondence is set up before the user needs to use the home theater system.
2Adaptability or versatility
If speakers are arranged in fixed positions, then channel mapping is simplified, but spatial flexibility and adaptability are reduced
Solution Approach 1:
The system transitions from two-dimensional planar speaker arrangement to three-dimensional spatial positioning by utilizing vertical distance information. Microphones capture test tones from speakers at different heights and distances, enabling the system to map channels based on three-dimensional spatial coordinates rather than fixed positional assignments.
Solution Approach 2:
The system uses feedback from microphone signals to automatically adjust channel mapping. By receiving test tone signals from speakers and analyzing their spatial characteristics, the system continuously adapts the channel-s speaker correspondence based on actual speaker locations, enabling flexible arrangement while maintaining accurate mapping.
3Productivity
If test tone signals are sent simultaneously to all speakers, then mapping process is faster, but signal identification becomes difficult
Solution Approach 1:
The system sends test tone signals sequentially to each speaker rather than simultaneously. The audio apparatus generates test tones for individual speakers in a predetermined sequence, allowing the microphones to clearly identify which speaker is transmitting which signal without interference from other speakers.
Solution Approach 2:
The system establishes a predetermined transmission sequence for test tones before actual mapping begins. By pre-defining the order in which test tones are sent to different speakers, the system ensures that each speaker's signal can be individually identified and mapped to the correct channel without signal confusion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures accurate audio signal distribution to the correct speakers, enhancing sound quality and convenience by allowing flexible speaker arrangement without space constraints, as the system determines the spatial location of each speaker based on received test tone signals.
Implementation Method 1
generates a plurality of test tone signals, and transmits the generated test tone signals to a plurality of speakers
Implementation Method 2
determines locations of the first sound output apparatus and the plurality of second sound output apparatuses by analyzing a plurality of received test tone signals
Data Source
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AI summary
An audio system, and an audio apparatus and a channel mapping method thereof are provided. The audio apparatus includes a interface configured to receive a plurality of test tone signals from each of a plurality of sound output apparatuses configured to output multichannel audio signals, a channel determiner configured to analyze the plurality of test tone signals determine locations of the plurality of sound output apparatuses, and generate a determination result based on the determined locations, an switch configured to output one test tone to each of the plurality of sound output apparatuses, and perform channel mapping to map channels through which the multichannel audio signals are output according to the determination result, and an output unit configured to be randomly connected to the plurality of sound output apparatuses, and output the multichannel audio signals by adjusting the random connection according to the channel mapping.