Digital Audio Signal Processing with EQ and Compression
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Solution Overview
Problem
Current methods for reproducing studio-quality sound outside of recording studios are costly and yield inconsistent results, requiring expensive hardware and complex signal processing, making it difficult to achieve high-quality sound in vehicles and other settings without significant investment.
Innovation Solution
A digital signal processing system that adjusts audio signals using a combination of gain amplifiers, filters, and compressors, including low and high shelf filters, graphic equalizers, and compressors, to enhance audio quality in personal listening devices and vehicle audio systems, allowing for studio-quality sound reproduction at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If expensive hardware and complex signal processing are used to reproduce studio-quality sound, then audio quality is improved, but cost and device complexity increase
Solution Approach 1:
The patent replaces complex hardware-based signal processing with software-based digital signal processing algorithms. The equalization and audio processing functions are implemented through programmable code rather than dedicated hardware circuits, allowing studio-quality sound reproduction through software processing of audio signals in portable devices.
Solution Approach 2:
The patent applies dynamic equalization parameters and signal processing settings that can be adjusted through software to achieve studio-quality sound. By changing processing parameters such as equalization curves, compression ratios, and gain settings through programmable algorithms, the system achieves high audio quality without requiring expensive fixed hardware.
2Manufacturing precision
If expensive hardware upgrades are made to achieve studio-quality sound in vehicles, then audio quality is improved, but cost increases
Solution Approach 1:
The patent replaces expensive hardware upgrades with software-based processing solutions that can be implemented in existing vehicle audio systems. The digital signal processing algorithms run on standard processors already present in modern vehicles, eliminating the need for costly hardware modifications while achieving studio-quality sound output.
Solution Approach 2:
The patent replicates the functionality of expensive studio-quality audio equipment through software algorithms that simulate professional audio processing. By copying the signal processing functions of studio hardware into programmable form, the system achieves similar audio quality at a fraction of the cost.
3Manufacturing precision
If advanced speaker design and power amplification are used to achieve studio-quality sound, then audio quality is improved, but power consumption and cost increase
Solution Approach 1:
The patent applies preliminary digital signal processing and equalization to optimize audio signals before they reach the speakers. By pre-processing the audio signal with software-based equalization and compression algorithms, the system maximizes the efficiency of the existing speaker and amplifier hardware, achieving studio-quality sound with reduced power consumption compared to brute-force power amplification.
Data Source
AI summary
The present invention provides methods and systems for digitally processing audio signals. Some embodiments receive an audio signal and converting it to a digital signal. The gain of the digital signal may be adjusted a first time, using a digital processing device located between a receiver and a driver circuit. The adjusted signal can be filtered with a first low shelf filter. The systems and methods may compress the filtered signal with a first compressor, process the signal with a graphic equalizer, and compress the processed signal with a second compressor. The gain of the compressed signal can be adjusted a second time. These may be done using the digital processing device. The signal may then be output through an amplifier and driver circuit to drive a personal audio listening device. In some embodiments, the systems and methods described herein may be part of the personal audio listening device.