Sound Signal Processing Device Acoustic Environment Adaptation

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Solution Overview

Problem

Existing sound signal processing methods do not effectively reproduce the intended effects added by distributors during distribution, as they do not consider the acoustic characteristics of the listener's reproduction environment, leading to unintended outcomes.

Innovation Solution

A sound signal processing method that receives a sound signal and its associated parameters, detects the acoustic characteristics of the listener's environment, and adjusts additional processing parameters to apply signal processing that aligns with the distributor's intent, ensuring the intended effect is reproduced.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a distributor adds effects to sound signals for content distribution, then the sound production quality is improved, but the intended effect cannot be realized at the listener's end due to different acoustic characteristics

Engineering Contradiction:

Improvesound production qualityVSAvoideffect reproduction accuracy

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The system changes the effect parameters dynamically based on the detected acoustic characteristics of the listener's environment. The processor adjusts parameters such as reverberation time, decay rate, and echo density to match the original acoustic conditions, ensuring the intended effect is reproduced accurately despite differences in reproduction environments

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system uses feedback from acoustic characteristic detection to adjust the effect parameters. By detecting the actual acoustic characteristics at the listener's end and comparing them with the original conditions, the system iteratively adjusts the parameters to achieve the intended sound production effect

Inventive Principle:

Principle #23Feedback

2Device complexity

If fixed effect parameters are used for sound distribution, then the processing complexity is reduced, but the adaptation to different acoustic environments is insufficient

Engineering Contradiction:

Improveprocessing complexityVSAvoidacoustic environment adaptation

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The system performs preliminary detection of acoustic characteristics before applying the effect. By measuring the acoustic environment in advance and storing the characteristics, the system can quickly retrieve and apply appropriate parameters without complex real-time calculations, reducing processing complexity while maintaining adaptability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of using fixed parameters, the system prepares multiple preset parameters corresponding to different acoustic environments and selects the appropriate ones based on detection results. This approach maintains relatively simple processing while achieving good adaptability to various acoustic conditions

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20240422496A1Sound signal processing method, sound signal processing device, and sound signal distribution system

Publication Date: 2024.12.19 YAMAHA CORP

AI summary

A sound signal processing method includes receiving, from a distribution source, a sound signal, and a first parameter of a first signal processing to be applied to the sound signal, detecting a first acoustic characteristic of a listener's reproduction environment, adjusting a second parameter based on the first parameter and the first acoustic characteristic, and applying a second signal processing on the sound signal based on the second parameter, thereby obtaining a reproduction sound signal to be reproduced in the reproduction environment.