3D Audio Spatial Coding With Dynamic Bit Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of bit allocation in three-dimensional audio signal processing is unresolved, leading to inefficient storage and transmission due to the large data volume and high bandwidth requirements of three-dimensional sound field information.
Innovation Solution
A method for three-dimensional audio signal processing that involves spatial coding to obtain transmission channel signals and attribute information, allowing for separate determination of bit allocation ratios for virtual speaker and residual signal groups based on energy representation values and anisotropic sound sources, using preset algorithms to optimize bit allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the three-dimensional audio signal is compressed to reduce storage space and bandwidth requirements, then the storage space and bandwidth requirements are reduced, but the bit allocation for virtual speaker and residual signal groups becomes uncertain
Solution Approach 1:
The patent changes the parameter of bit allocation by introducing dynamic bit allocation ratios based on energy representation values. The system calculates the energy representation value of the three-dimensional audio signal and uses it to determine the bit allocation ratio for virtual speaker signal groups and residual signal groups, transforming the bit allocation from a fixed parameter to a dynamically adjustable one based on signal characteristics.
Solution Approach 2:
The patent implements dynamic bit allocation where the bit allocation ratio is not fixed but varies according to the energy representation value of the audio signal. The system continuously adapts the bit allocation between virtual speaker and residual signal groups based on the current signal's energy characteristics, making the coding system flexible and adaptive to different audio content.
2Quantity of substance
If the three-dimensional audio signal is compressed to reduce bandwidth requirements, then the bandwidth requirement is reduced, but the coding efficiency becomes insufficient without proper bit allocation
Solution Approach 1:
The patent changes the bit allocation parameter dynamically based on energy representation values. By calculating the energy representation value of the three-dimensional audio signal and using it to determine optimal bit allocation ratios, the system improves coding efficiency while maintaining reduced bandwidth requirements.
Solution Approach 2:
The patent introduces a feedback mechanism where the energy representation value of the audio signal is calculated and used to adjust the bit allocation ratio. This feedback loop ensures that the bit allocation is continuously optimized based on the actual signal characteristics, improving coding efficiency without increasing bandwidth consumption.
3Ease of operation
If uniform bit allocation is used for virtual speaker and residual signal groups, then the allocation process is simple, but the coding efficiency is reduced due to lack of optimization
Solution Approach 1:
The patent transforms the bit allocation parameter from a uniform fixed value to a dynamic value based on energy representation ratios. The system calculates the energy representation value and uses it to determine the bit allocation ratio for virtual speaker signal groups versus residual signal groups, optimizing coding efficiency while maintaining operational simplicity through automated calculation.
Data Source
AI summary
Embodiments of this application disclose a three-dimensional audio signal processing method and apparatus, to implement bit allocation of a signal. The method includes: performing spatial coding on a to-be-coded three-dimensional audio signal, to obtain a transmission channel signal and transmission channel attribute information, where the transmission channel signal includes at least one virtual speaker signal group and at least one residual signal group; and determining a bit allocation ratio of the virtual speaker signal group and a bit allocation ratio of the residual signal group based on the transmission channel attribute information.