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Featured researches published by Udo Reimann.


IEEE Journal of Solid-state Circuits | 1989

A single-chip adaptive DPCM video codec

Matthias Schobinger; Bernd Zehner; Fred Matthiesen; Ulrich Totzek; Jutta Hartl; Udo Reimann

A differential pulse-code modulation (DPCM) video codec with two-dimensional intrafield prediction and adaptive quantizer is presented. An approach for the arithmetic implementation of the DPCM structure and the design of a test chip, fabricated in a 1.5 mu m CMOS technology, is described. This is the first VLSI realization of a DPCM codec with adaptive quantizer. For the test chip transmitter or receiver mode, application as part of a three-dimensional interframe codec and processing of luminance or chrominance signals are optional. A line buffer and ten different quantizer characteristics are realized on-chip. Correct operation has been verified up to 26 MHz. >


Archive | 1991

Passive optical telecommunication system for narrow band and broadband integrated services digital networks

Udo Reimann


Archive | 1991

Optical data network having adjustable delays for switching over to backup unit

Andreas Imhoff; Hendrik Keller; Udo Reimann; Walter Wessely


Archive | 1991

Highly reliable optical data system.

Andreas Imhoff; Hendrik Keller; Udo Reimann; Walter Wessely


Archive | 1984

Circuit for rapidly determining the greatest difference among three binary numerical values

Udo Reimann


Archive | 1991

Optisches datennetz hoher betriebssicherheit

Andreas Imhoff; Hendrik Keller; Udo Reimann; Walter Wessely


Archive | 1988

Method and apparatus for improving the picture quality in multi-dimensional differential pulse code modulation

Udo Reimann; Werner Liegl


Archive | 1990

Optical data network high reliability

Andreas Imhoff; Udo Reimann; Hendrik Keller; Walter Wessely


Archive | 1990

Optisches datennetz hoher betriebssicherheit Optical data network high operational safety

Andreas Imhoff; Udo Reimann; Hendrik Keller; Walter Wessely


Journal of Pain and Symptom Management | 1988

A Single-Chip Adaptive DPCM Intrafield Video Codec

Matthias Schoebinger; Bernd Zehner; Fred Matthiesen; Ulrich Totzek; Jutta Haertl; Udo Reimann

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