Sound Data Creation Through Bit-Depth Conversion and Directivity
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Solution Overview
Problem
Existing sound data creation methods do not effectively improve the quality of sound data, particularly in converting between different bit formats and incorporating directivity information.
Innovation Solution
A method and device that generate first sound data with a specific number of bits and then create second sound data with fewer bits, incorporating directivity information through gain processing, format conversion, and directivity acquisition, either using machine-trained models or device information to enhance sound data quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If sound data is converted from high bit format to low bit format, then data size is reduced, but sound quality deteriorates
Solution Approach 1:
The patent applies preliminary action by performing gain processing on the sound signal before A/D conversion to optimize the signal level. This pre-processing ensures that the sound signal is at the optimal level for conversion, which helps maintain sound quality even when converting to lower bit formats. The gain processing is done in advance to prevent quality loss during the bit format conversion process.
Solution Approach 2:
The patent employs parameter changes by converting sound data between different bit formats (e.g., 32-bit floating point to 24-bit or 16-bit pulse code modulation) while applying specific processing techniques. The system changes the numerical representation parameters of the sound data and uses directivity information to compensate for potential quality degradation, allowing efficient storage and transmission while maintaining acceptable sound quality.
2Manufacturing precision
If monaural sound data is converted to stereo sound data, then spatial audio quality is improved, but data complexity increases
Solution Approach 1:
The patent uses directivity information as an intermediary element to convert monaural sound data to stereo sound data. Instead of directly generating stereo signals from monaural input, the system first determines directivity information (spatial characteristics) and then uses this information to synthesize the stereo sound field. This intermediary approach simplifies the conversion process while achieving realistic spatial audio effects.
3Measurement precision
If directivity information is incorporated into sound data, then spatial audio accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies segmentation by separating the sound data processing into distinct components: the sound signal itself and the directivity information. The directivity information is extracted and processed as a separate element that describes spatial characteristics without being mixed with the audio signal data. This segmentation allows for efficient storage and processing, as the directivity information can be handled independently to achieve spatial audio accuracy without unnecessarily complicating the overall processing system.
Data Source
AI summary
A sound data creation method of the present disclosure includes a recording step of generating and recording first sound data having a first number of bits based on a first sound signal output from a first sound collection element, and a creation step of creating, based on the first sound data, second sound data having a second number of bits, which is smaller than the first number of bits, and having directivity information.