Sound Field Control Apparatus Using Room Impulse Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Voice recognition systems struggle to accurately receive user commands due to noise interference from electronic devices, such as TVs, which requires users to reduce volume or speak loudly, limiting the effectiveness of sound field control in reflecting spatial characteristics and providing optimal user experience.
Innovation Solution
A sound field control apparatus that uses room impulse response to cancel sound signals around the microphone, generating and filtering sound signals to provide an independent sound field, allowing for accurate voice recognition and personalized audio delivery by removing direct sound and synthesizing indirect sound information based on spatial characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sound signal cancellation is applied around the microphone, then voice recognition accuracy is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary sound field control by generating room impulse response information before voice recognition occurs. The processor pre-calculates cancellation signals based on spatial characteristics, so when a user speaks, the noise cancellation is already in place, improving recognition accuracy without adding real-time processing complexity
Solution Approach 2:
The patent introduces room impulse response information as an intermediary element that mediates between the sound source and microphone. This intermediary contains pre-computed spatial characteristics that enable the system to cancel noise effectively without requiring complex real-time calculations, thus resolving the contradiction between accuracy and complexity
2Adaptability or versatility
If room impulse response is used to provide personalized sound field, then user experience is improved, but processing time increases
Solution Approach 1:
The system pre-computes room impulse response information based on spatial characteristics before actual use. This preliminary action stores the processed spatial data, so when providing personalized sound fields, the system only needs to retrieve and apply pre-computed information rather than calculating everything in real-time, thus reducing processing time while maintaining personalization capability
Solution Approach 2:
The patent creates a copied representation of the acoustic environment through room impulse response information. Instead of processing actual acoustic signals in real-time, the system uses this copied spatial model to simulate and control sound fields, significantly reducing processing time while preserving the personalized sound field effects
Data Source
AI summary
A sound field control apparatus includes a microphone configured to receive an utterance of a user, an output interface configured to output at least one of a sound signal and image data, and one or more processors configured to cancel a sound signal in a specific area around the microphone, obtain room impulse response information based on a user utterance position when the utterance of the user is received, and output a sound signal for providing an independent sound field to the user based on the room impulse response information.