Acoustic Processing With Separate Paths for Mixed-Band Speakers
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Solution Overview
Problem
In object-based audio systems with speakers having different replaying bands, sound quality degradation occurs due to mismatched frequency bands and localization positions, particularly when high-frequency components are replayed by speakers with lower bands.
Innovation Solution
Perform rendering processing separately for speakers with different replaying bands, using high-pass, band-pass, and low-pass filters to ensure each speaker reproduces the appropriate frequency components, thereby generating output audio signals tailored to their respective bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If rendering processing is performed using a single speaker layout with uniform replaying bands, then the system complexity is reduced, but sound quality degrades when speakers with different replaying bands are used
Solution Approach 1:
The patent divides the rendering processing into multiple independent processing paths, each dedicated to a specific speaker layout with uniform replaying bands. Instead of using a single rendering processor that handles all speakers, the system creates separate rendering processors for different speaker groups (e.g., front speakers, rear speakers, woofers, tweeters), allowing each to be optimized for its specific frequency range and spatial position.
Solution Approach 2:
The patent applies different rendering characteristics to different speaker groups based on their specific properties. Each speaker layout is configured with localization information appropriate to its spatial position and frequency range, allowing high-frequency speakers (tweeters) to handle high-frequency components while low-frequency speakers (woofers) handle low-frequency components, thereby maintaining sound quality across the entire audio spectrum.
2Adaptability or versatility
If speakers with different replaying bands are used to cover wider frequency range, then the frequency coverage is improved, but sound quality degrades due to mismatched frequency bands and localization positions
Solution Approach 1:
The patent segments the speaker system into multiple groups based on replaying band characteristics. Each speaker group (e.g., woofers for low frequencies, tweeters for high frequencies) is assigned to a dedicated rendering processor that applies appropriate localization information, ensuring that each frequency range is handled by speakers with matching capabilities.
Solution Approach 2:
The patent configures different localization information for different speaker groups according to their spatial positions and frequency ranges. High-frequency speakers positioned at specific locations receive localization information optimized for high-frequency perception, while low-frequency speakers receive localization information appropriate for their position and frequency characteristics, preventing sound quality degradation.
3Device complexity
If all speakers are configured with the same replaying band, then the system configuration is simplified, but the ability to reproduce different frequency components appropriately is reduced
Solution Approach 1:
The patent segments the speaker system into multiple rendering processors, each handling a specific speaker layout with uniform replaying bands. This segmentation allows the system to maintain relatively simple individual configurations while achieving complex overall frequency reproduction capabilities through the combination of multiple specialized processors.
Solution Approach 2:
The patent creates a universal rendering processing system that can handle multiple speaker layouts with different replaying bands through a common framework. The rendering processing apparatus is designed to accommodate various speaker configurations (front, rear, woofers, tweeters) using a unified approach that applies appropriate localization information to each group, achieving both simplicity and versatility.
Data Source
AI summary
The present technology relates to an acoustic processing device, method, and program capable of performing audio replaying with higher sound quality. An acoustic processing device includes: a first rendering processing unit that performs rendering processing on the basis of an audio signal and generates a first output audio signal for outputting sound from a plurality of first speakers; and a second rendering processing unit that performs rendering processing on the basis of an audio signal and generates a second output audio signal for outputting sound from a plurality of second speakers having a different replaying band from that of the first speakers. The present technology can be applied to an audio replaying system.