Journal Forum

Synthetic Reverberator - January 1960

Sound Board: High-Resolution Audio - October 2015

Synchronized Swept-Sine: Theory, Application, and Implementation - October 2015

Access Journal Forum

AES E-Library

Companded Predictive Delta Modulation: A Low-Cost Conversion Technique for Digital Recording

Document Thumbnail

Adigital recording system is described that employs a type of analog-to-digital converter other than the 16-bit linear pulse-code modulation converters commonly in use. The conversion process, called companded predictive delta modulation, differs from adaptive delta modulation in that the input signal is dynamically (in both amplitude and spectrum) adjusted by a voltage-controlled amplifier and then passed through a fixed (nonadaptive) delta modulator. Dither is added to provide a white noise floor and minimize low-level distortion. Instead of a single integrator, the delta modulator uses a second-order feedback filter, which increases its dynamic range substantially. Since delta modulators have low sensitivity to bit errors, the error-correction circuitry is relatively simplified. A convolutional error-correction code was chosen in this application.

JAES Volume 32 Issue 9 pp. 659-672; September 1984
Publication Date:

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.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society