Sound Signal Processing Device Vocal Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sound signal processing techniques fail to appropriately add surround sound effects while maintaining vocal clarity, often resulting in unclear voice or reduced surround sound intensity due to inadequate removal of vocal components.
Innovation Solution
A sound signal processing device that includes a remover to generate a vocal-free signal, a surround sound processor to add effects, an amplifier to adjust signal intensity based on specific coefficients, and synthesizers to combine signals, with the setting unit adjusting amplification factors to prioritize surround sound effects over vocal bandwidth removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vocal components are removed using a band elimination filter, then vocal clarity is improved, but surround sound effects are reduced or lost
Solution Approach 1:
The patent segments the audio signal processing into distinct stages: first removing vocal components using a band elimination filter, then separately adding surround sound effects to the filtered signal. This segmentation allows independent optimization of vocal clarity and surround sound effects without mutual interference
Solution Approach 2:
The patent applies preliminary vocal removal before surround sound processing. By removing vocal components first and then adding surround effects to the cleaned signal, the system ensures that surround effects are applied only to non-vocal content, preventing vocal degradation while maintaining surround sound quality
2Power
If amplification factor is increased to maintain signal intensity, then surround sound intensity is improved, but vocal distortion increases
Solution Approach 1:
The patent applies different processing qualities to different signal components: vocal components are removed entirely from the surround processing path, while non-vocal components receive full surround processing and amplification. This local quality differentiation allows high amplification for surround effects without affecting vocal quality
Solution Approach 2:
The patent extracts vocal components from the audio signal before applying surround processing and amplification. By taking out vocals from the processing chain, the system can apply aggressive amplification to the remaining signal to maintain surround intensity without risking vocal distortion
3Loss of information
If surround sound processing is applied to signals with vocal components, then surround sound effects are enhanced, but vocal clarity deteriorates
Solution Approach 1:
The patent performs preliminary vocal removal before applying surround sound processing. This preliminary action ensures that subsequent surround processing operates only on non-vocal content, thereby enhancing surround sound intensity without degrading vocal clarity
Solution Approach 2:
The patent converts the potential harm of applying surround processing to vocals into a benefit by first removing vocals. The band elimination filter transforms the signal by removing unwanted vocal content, which then allows aggressive surround processing to be applied to the cleaned signal, turning what would have been a harmful operation into a beneficial one
Data Source
AI summary
A sound signal processing device includes: a vocal remover which generates a first output signal based on first-channel and second-channel sound signals and a first coefficient indicating a vocal bandwidth to be removed; a surround sound processor which generates a second output signal by adding a surround sound effect to the first output signal; an amplifier which amplifies a signal at an amplification factor that is based on a second coefficient; a synthesizer which synthesizes the second output signal with one of the first-channel and second-channel sound signals, and synthesizes a signal that is the second output signal inverted with another one of the first-channel and second-channel sound signals; and a coefficient determination unit which sets the second coefficient such that the amplification factor, used when the vocal bandwidth to be removed is greater than a first bandwidth, is greater than the amplification factor for the first bandwidth.