Sound Processing Apparatus Frequency-Based BGM Volume Adjustment
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Solution Overview
Problem
Conventional sound control processing often results in sound effects being drowned out by background music (BGM) during simultaneous output, making it difficult for users to hear the sound effects effectively.
Innovation Solution
A computer-readable storage medium with a sound processing program that adjusts the sound intensity of BGM by decreasing specific frequency components of the BGM when the sound intensity of corresponding sound effect components is low, ensuring a balanced volume between BGM and sound effects through discrete Fourier transform and frequency analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If BGM and sound effect are outputted simultaneously, then entertainment characteristics are enhanced, but sound effect becomes difficult to hear
Solution Approach 1:
The patent applies local quality by adjusting the volume of BGM specifically at frequency components where sound effects occur, rather than uniformly across all frequencies. This allows the sound effect to be heard clearly at its specific frequency range while maintaining the overall BGM volume and entertainment quality.
Solution Approach 2:
The patent changes the volume parameter of BGM dynamically based on the frequency components of the sound effect. By detecting the frequency of the sound effect and adjusting the corresponding BGM frequency components, the system ensures sound effect audibility while maintaining overall audio quality and entertainment characteristics.
2Reliability
If volume of BGM is decreased to hear sound effect, then sound effect becomes audible, but overall volume balance is disrupted
Solution Approach 1:
Instead of decreasing the overall BGM volume, the patent decreases only the volume at specific frequency components where the sound effect occurs. This local adjustment ensures sound effect audibility while maintaining the overall volume balance and listener comfort.
Solution Approach 2:
The patent dynamically changes the volume parameter of BGM based on the detected sound effect frequency components. This selective parameter adjustment ensures that sound effects are audible without disrupting the overall volume balance of the audio output.
3Ease of operation
If frequency analysis is performed on sound signals, then appropriate volume adjustment is enabled, but processing complexity increases
Solution Approach 1:
The patent performs frequency analysis to identify the frequency components of sound effects and uses this information to adjust the volume of corresponding BGM frequency components. This parameter-based approach enables precise volume adjustment while keeping the processing relatively simple by focusing only on relevant frequency components.
Data Source
AI summary
A BGM signal of sound of BGM is outputted over time, and a sound effect signal of sound of a sound effect is outputted at a timing determined based on information processing. If it is determined that a sound intensity at a predetermined frequency component of the sound effect to be outputted is low or a sound intensity at the predetermined frequency component of the BGM is high, adjustment is performed such that the sound intensity at the predetermined frequency component of the BGM to be outputted at the same timing as the sound effect is decreased. Then, a final sound signal including the sound of the sound effect and the sound of the BGM on which the adjustment has been performed, is synthesized and outputted.