Oversampled Analog-to-Digital Conversion for Digital Audio Systems
An alternative method of digitizing music signals is presented. It relies on the techniques of spectral noise shaping and oversampling, which achieve theoretical and computed signal-to-quantization-noise ratios of 110-120 dB. This encoding scheme is based on high order delta-sigma modulation and is referred to as HLDSM A/D conversion. A hardware conversion of this system was developed measuring 80-dB SQNR and 0.007% total harmonic distortion. Potentially the HLDSM A/D converter offers noise and distortion performance superior to pulse-code modulation, a simpler hardware realization and reduced cost.
Click to purchase paper 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 $20 for non-members, $5 for AES members and is free for E-Library subscribers.