Acoustic Processing Device for Dynamic Virtual Surround Control
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Solution Overview
Problem
Existing sound image localization technologies, such as virtual surround, often result in an unnatural sound field spread during scenes like movie dialogues, where the sound image localization is not effectively pinpointed, leading to an unnatural listener experience.
Innovation Solution
An acoustic processing device that analyzes input signals and determines between two distinct acoustic effects - feedback cross delay and trans-aural processing - based on signal characteristics, applying the appropriate effect to enhance sound localization and prevent unnatural sound field spreads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If virtual surround acoustic effect is applied to all input signals, then sound image localization in rear channels is improved, but sound field spread becomes unnatural in front sound field scenes
Solution Approach 1:
The system dynamically switches between different acoustic effects (virtual surround and alternative acoustic effect) based on the analyzed characteristics of the input signal. The determining task selects which acoustic effect to apply in real-time, allowing the system to adapt to different scene requirements and maintain naturalness while achieving sound image localization when needed.
Solution Approach 2:
Different acoustic effects are applied to different types of input signals based on their characteristics. The system analyzes the input signal and applies virtual surround effect only to signals that benefit from rear channel localization, while applying a different acoustic effect to signals that require natural front sound field reproduction, thus achieving local optimization of sound quality.
2Adaptability or versatility
If acoustic effect is applied to enhance surround feeling, then listener immersion is improved, but sound localization precision deteriorates in dialogue scenes
Solution Approach 1:
The system dynamically adjusts the type of acoustic effect applied based on real-time analysis of the input signal characteristics. When dialogue or front sound field scenes are detected, the system switches to an acoustic effect that preserves localization precision. When movie scenes or surround effects are appropriate, it applies virtual surround to enhance immersion, thus adapting to different listening scenarios.
Solution Approach 2:
The system changes the parameters of acoustic processing based on the input signal characteristics. By analyzing features of the input signal and switching between different acoustic effect configurations, the system optimizes the balance between surround feeling and localization precision for different types of audio content.
Data Source
AI summary
An acoustic processing device including a memory storing instructions and a processor that implements the stored instructions to execute a plurality of tasks, the tasks including: an analyzing task that analyzes an input signal; a determining task that determines an acoustic effect to be applied to the input signal, from among a first acoustic effect of virtual surround and a second acoustic effect of virtual surround different from the first acoustic effect, based on a result of the analyzing task; and an acoustic effect applying task that applies the acoustic effect determined by the determining task to the input signal.