Audio Signal Processing Device for Reverb Encoding Efficiency
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Solution Overview
Problem
Existing audio encoding methods struggle to efficiently transmit and process reverb data for audio objects in real-time, leading to increased transmission rates and reduced encoding efficiency.
Innovation Solution
A signal processing device and method that acquire reverb information, including space and object-specific reverb data, and generate reverb components for audio objects, allowing for adaptive encoding and improved transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If reverb processing data is stored for each frame for every audio object, then audio reproduction quality is improved, but transmission rate increases and encoding efficiency decreases
Solution Approach 1:
The patent segments reverb processing data into two distinct types: space reverb information (common to all audio objects in a space) and object reverb information (specific to each audio object). This segmentation allows the system to transmit only necessary data for each audio object while sharing common space reverb information, thereby reducing the overall transmission rate and improving encoding efficiency while maintaining audio reproduction quality.
Solution Approach 2:
The space reverb information serves multiple functions by being commonly used for all audio objects within the same space. Instead of transmitting separate reverb data for each audio object, the system transmits the space reverb information once and applies it to multiple audio objects, reducing redundancy and improving encoding efficiency while maintaining high audio reproduction quality.
2Manufacturing precision
If physical calculation of reflection and attenuation is performed, then sense of distance expression is improved, but calculation time increases and real-time rendering becomes difficult
Solution Approach 1:
The system performs physical calculations of reflection and attenuation in advance to pre-compute space reverb information and object reverb information. These pre-computed values are stored and can be quickly applied during real-time audio rendering, allowing the system to achieve accurate sense of distance expression without the computational burden of performing full physical calculations in real-time.
Solution Approach 2:
Instead of performing complex physical calculations in real-time, the system uses pre-computed and stored reverb information (impulse responses, reflection coefficients, attenuation values) as copies of the actual physical acoustic characteristics. These pre-computed data structures replicate the effects of physical calculations much faster, enabling real-time rendering while maintaining accurate sense of distance expression.
3Manufacturing precision
If reverb information is transmitted for all audio objects, then audio quality is maintained, but data transmission rate increases
Solution Approach 1:
The patent merges space reverb information and object reverb information into a unified transmission framework where space reverb information is transmitted once for the entire space and object reverb information is transmitted only when necessary for specific audio objects. This merging approach allows the system to maintain audio quality by including both types of information while significantly reducing the overall data transmission rate compared to transmitting complete reverb data for all audio objects.
Solution Approach 2:
The system applies local quality by transmitting space reverb information universally for all audio objects in a space, while transmitting object reverb information selectively only when needed for specific audio objects. This localized approach ensures that audio quality is maintained for objects requiring detailed reverb processing while avoiding unnecessary data transmission for objects where space reverb information alone is sufficient.
Data Source
AI summary
The present technology relates to a signal processing device, method, and program that can improve encoding efficiency.A signal processing device includes: an acquisition unit that acquires reverb information including at least one of space reverb information specific to a space around an audio object or object reverb information specific to the audio object and an audio object signal of the audio object; and a reverb processing unit that generates a signal of a reverb component of the audio object on the basis of the reverb information and the audio object signal. The present technology can be applied to a signal processing device.