The optimization of PWM methods is essential for the evolution of integrated digital audio systems. The proposed system employs multirate analysis of the original audio wave form with parallel evaluation of its noise-masking threshold. The signal is then requantized and PWM coded so that quantization and modulation noise is kept below this threshold. An additional oversampling and noise-shaping procedure is included to minimize modulation artifacts.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.