Object Audio Reverb Processing for Distance Feeling Control
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Solution Overview
Problem
Existing object-based audio technologies face challenges in effectively implementing distance feeling control, particularly in creating a front-rear distance feeling through gain control or frequency characteristics, and struggle to maintain control over the reproduction side.
Innovation Solution
A signal processing device and method that incorporates a reverb processing unit to generate a reverb component based on object audio data and reverb parameters, allowing for distance feeling control by adding a reflection or reverberation component, which is localized differently from the sound image of the object, using meta information for filtering and reconfiguring the reverb processing algorithm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gain control or frequency characteristic control is used to create distance feeling, then distance feeling control is achieved, but the control effect is insufficient and cannot be effectively implemented
Solution Approach 1:
The patent changes the parameter space by introducing reverb-related parameters (reverb gain, pre-delay time, early reflection gain, late reflection gain) beyond traditional gain and frequency characteristics. This allows more precise and effective distance feeling control by manipulating the temporal and spatial characteristics of reflected sound
Solution Approach 2:
The patent adds temporal dimension (delay time, pre-delay) and spatial dimension (early reflection, late reflection separation) to the traditional one-dimensional gain control. This multi-dimensional approach enables more effective distance feeling control that cannot be achieved by gain or frequency control alone
2Illumination intensity
If a waveform signal previously processed to have distance feeling is used, then sound quality with distance feeling is achieved, but distance feeling cannot be controlled on the reproduction side
Solution Approach 1:
The patent segments the audio signal into direct sound and reverb component, with independent control parameters for each. The reverb component is further segmented into early reflection and late reflection. This segmentation allows the reproduction side to control distance feeling by adjusting reverb parameters without affecting the original waveform signal's sound quality
Solution Approach 2:
The patent performs preliminary encoding of reverb parameters (reverb gain, pre-delay time, early reflection gain, late reflection gain) into the bitstream during content creation. This preliminary action enables the reproduction side to flexibly control distance feeling by decoding and applying these pre-encoded parameters to the object audio data
Data Source
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AI summary
The present technology relates to a signal processing device, a signal processing method, and a program that enable implementation of more effective distance feeling control. The signal processing device includes a reverb processing unit that generates a signal of a reverb component on the basis of object audio data of an audio object and a reverb parameter for the audio object. The present technology can be applied to a signal processing device.