On July 14, MP3 audio data reduction will be a quarter of a century old – A success story from Germany that is far from over.

This paper describes a pulse code modulation (PCM) encoder that employs a delta modulator as the analog-to-digital converter. A tapped binary shift register and an up-down counter cause delta ...

This paper proposes the fixed-off-time pulse coding modulation (PCM) for single-phase direct ac-ac converters in induction heating (IH) systems, which achieves fixed-frequency control of the direct ac ...