Dynamic Audio Processing via Clock Shifting for Loudness Control
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Solution Overview
Problem
Existing audio processing methods struggle to increase volume levels without flattening dynamics or causing distortion, making it difficult for non-professionals to achieve commercially competitive loudness without expensive equipment.
Innovation Solution
A system that plays digital audio files at a higher clock frequency, converting them to analog signals for processing through analog circuits, and then back to digital with reduced low-frequency information to minimize distortion, allowing for louder and more dynamic audio files.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If dynamic compression and limiting are applied to increase volume levels, then loudness is improved, but dynamics (volume fluctuations) are flattened
Solution Approach 1:
The system dynamically adjusts the clock frequency based on the instantaneous volume level of the audio signal. When the signal exceeds a threshold, the clock frequency is increased to shift frequencies upward, allowing compression and limiting to occur at higher frequencies where less distortion is generated, thereby preserving dynamics while increasing loudness
Solution Approach 2:
The patent changes the clock frequency parameter in real-time during audio processing. By varying the clock frequency dynamically rather than using a fixed frequency, the system allows the audio signal to maintain its dynamic characteristics while still achieving increased loudness through frequency-dependent processing
2Power
If dynamic compression and limiting are applied to increase volume levels, then loudness is improved, but distortion increases
Solution Approach 1:
The system changes the clock frequency parameter dynamically during processing. When compression and limiting are applied, the clock frequency is increased which shifts the audio frequencies upward, allowing the processing to occur in a frequency range that generates less distortion while still achieving the desired loudness increase
Solution Approach 2:
The clock frequency is adjusted dynamically based on signal conditions rather than remaining static. This dynamic adjustment ensures that frequency shifting occurs precisely when needed during compression and limiting operations, minimizing distortion generation while maintaining loudness
3Power
If professional equipment is used to achieve commercial loudness, then loudness is improved, but cost increases
Solution Approach 1:
The patent implements a parameter change approach by dynamically adjusting the clock frequency within a digital audio processing system. This software-based parameter modulation achieves professional-grade loudness results without requiring expensive analog hardware equipment, thereby reducing device complexity and cost
Solution Approach 2:
The invention replaces traditional mechanical/analog audio processing equipment with a digital system that uses clock frequency manipulation. This substitution of mechanical systems with digital signal processing achieves the same loudness enhancement effects without the cost and complexity of professional analog equipment
Data Source
AI summary
Systems and methods presented herein may provide for processing audio with increased loudness and dynamics. A first clock frequency associated with a digital audio file may be increased to a second clock frequency, which speeds up the playback of the audio. The digital audio file may then be converted to analog at the higher second frequency, where it is further modified in the analog domain. The analog audio is then converted back into digital audio at the second clock frequency. The clock frequency is then decreased back to the first clock frequency for playback or storage of the processed (i.e., modified or manipulated) digital audio file. Alternatively, the entire process can take place in the digital domain.