Speech Processing With High-Frequency Attack and Release Adjustment
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Solution Overview
Problem
Conventional audio technologies are limited in creating an immersive three-dimensional sound experience, particularly at higher frequencies, as they rely primarily on phase shifting, which is inadequate and can confuse the brain about sound location, leading to poor sound effects.
Innovation Solution
The system modifies audio files by combining phase shifting and gain adjustment of various frequency portions, allowing for increased phase shifting effects and enhancing higher frequency aspects to create a more immersive sound experience, using techniques like bandpass filtering and equalization to enhance specific frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase shifting is used to create three-dimensional sound effects, then sound localization is improved, but at higher frequencies the phase shifting becomes inadequate and can confuse the brain about sound location
Solution Approach 1:
The patent changes the processing parameters by applying frequency-dependent phase shifting and gain adjustment. Specifically, it applies different phase shift amounts and gain values to different frequency bands, with higher gain values applied to higher frequencies to compensate for the brain's reduced sensitivity to phase shifts at those frequencies. This parameter adaptation resolves the contradiction by making the phase shifting effective across the entire frequency spectrum.
Solution Approach 2:
The patent segments the audio signal into multiple frequency bands using bandpass filtering. Each frequency band is then processed independently with customized phase shifting and gain adjustment parameters. This segmentation allows the system to apply appropriate processing to each band, preventing the confusion that would occur if uniform phase shifting were applied across all frequencies.
2Measurement precision
If gain adjustment of higher frequency portions is applied, then the three-dimensional aspect of sound is increased, but the complexity of audio processing increases
Solution Approach 1:
The patent divides the audio processing into segmented frequency bands using bandpass filters. This segmentation simplifies the overall processing complexity by allowing independent, standardized processing of each band rather than requiring complex full-spectrum processing. Each band can be processed with relatively simple gain adjustment and phase shifting operations.
Solution Approach 2:
The patent applies local quality enhancement by adjusting gain and phase shift parameters specifically for higher frequency bands where the brain is less sensitive to phase changes. This localized processing approach improves three-dimensional sound quality where needed without requiring complex processing across the entire frequency spectrum, thus managing overall system complexity.
3Ease of operation
If conventional phase shifting methods are used, then processing simplicity is maintained, but sound effects quality deteriorates at higher frequencies
Solution Approach 1:
The patent maintains processing simplicity through segmentation by using standard bandpass filtering techniques and independent processing of each frequency band. This modular approach keeps individual processing steps simple while achieving overall high-quality results that conventional single-stage phase shifting cannot provide, particularly at higher frequencies.
Solution Approach 2:
The patent improves sound effects quality by changing processing parameters based on frequency band. Different gain values and phase shift amounts are applied to different bands, with higher gain values for higher frequencies. This parameter adaptation maintains relative processing simplicity while dramatically improving sound effects quality compared to uniform phase shifting.
Data Source
AI summary
Systems and methods described herein modify audio content on an electronic device. Embodiments can be configured to detect a mode of the electronic device to determine whether the device is in a telephone mode; receive a speech signal from a speech source while the device is in the telephone mode; and process the speech signal to improve the perceived quality of the speech at a recipient when the electronic device is in a telephone mode; wherein processing the speech signal to improve the perceived quality of the speech comprises, decreasing the signal level of audio content outside of a determined frequency band relative to the signal level of the audio content within the determined frequency band; and wherein the determined frequency band is a frequency band associated a vocal range of the anticipated speech content. The method further includes adjusting high frequency sounds such as attack and release times of the speech signal based on sound events within the speech signal.