AES Store

Journal Forum

Reflecting on Reflections - June 2014

Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007

Quiet Thoughts on a Deafening Problem - May 2014
1 comment

Access Journal Forum

AES E-Library

Zero Position Coding (ZePoC) - A Generalised Concept of Pulse-Length Modulated Signals and its Application to Class-D Audio Power Amplfiers

Zero Position Coding (ZePoC) is introduced in this paper as a generalised concept for describing methods of generating binary signals with varying pulse-lengths. This class of signals is of basic interest within concepts of class-D power amplification. It is emphasised that from a generalised point of view such signals are generated by coding the positions of the zero-crossings (sign-changes) of some auxiliary signal being uniquely determined by the audio input signal. The new ZePoC concept is shown to include classical methods like NPWM and UPWM as well as a new method, SB-ZePoC, which allows the generation of a binary signal with separated baseband. The methods are compared showing that SB-ZePoC is favoured for use in the class-D amplification concept. Results of a first full audio band implementation of SB-ZePoC are given.

AES Convention: Paper Number:
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