Low Distortion Sound Reproduction Using 8Bit cU and ZePoC-Algorithms

Mathis W, Schnick O, Wellmann J. Low Distortion Sound Reproduction Using 8Bit cU and ZePoC-Algorithms. In: AES Convention 122. Audio Engineering Society; 2007. Paper 7109. Available from: https://aes.org/publications/elibrary-page/?id=14094

@inproceedings{Mathis2007_14094,
  author = {Mathis, Wolfgang and Schnick, Olaf and Wellmann, Jan},
  title = {{Low Distortion Sound Reproduction Using 8Bit cU and ZePoC-Algorithms}},
  booktitle = {AES Convention 122},
  note = {Paper 7109},
  year = {2007},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14094}
}

TY  - CPAPER
TI  - Low Distortion Sound Reproduction Using 8Bit cU and ZePoC-Algorithms
AU  - Mathis, Wolfgang
AU  - Schnick, Olaf
AU  - Wellmann, Jan
T2  - AES Convention 122
M1  - Paper 7109
PY  - 2007
DA  - 2007/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14094
PB  - Audio Engineering Society
LA  - en
AB  - The ZePoC-Encoding algorithm for Class-D amplification allows to separate the signal-baseband completely from all higher-frequency switching artifacts. Realtime-ZePoC-Encoding demands a lot of computational power, but in applications where recorded signals should be reproduced, they can be encoded by a software-defined ZePoC-System in advance. Reproducing this pre-encoded signal has very low hardware requirements: No digital-analog-converter or linear amplifier is needed, the playback device must only contain memory, a counter for forming the rectangular output-signal and,if higher output-power is required, an additional switching power-stage and filter. A simple system made up of an 8bit micro-controller at 16Mhz clock-rate could reach a Signal-to-Noise-ratio of 80dB and a usable frequency range of up to 15kHz. A test-system made up of an 8bit RISC-Processor, external memory and a single-transistor, single power-supply switching-stage will be presented.
ER  -