Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Hardware implementation of the framestore and data rate control for a digital HDTV-VCR

: Gruneberg, K.; Klein, H.; Nie, J.; Schussler, J.F.; Stammnitz, P.

Dubois, E. ; European Association for Signal Processing -EURASIP-:
Signal processing of HDTV, IV : Proceedings of the International Workshop on HDTV '92, Kawasaki, Japan, November 18 - 20, 1992
Amsterdam: Elsevier, 1993
ISBN: 0-444-81551-1
International Workshop on HDTV <1992, Kawasaki, Japan>
Fraunhofer HHI ()
codecs; high definition television; video tape recorders; fifo; data rate control; digital HDTV-vcr; digital recording; HDTV signals; eureka standard; codec; hdi-codec; playtime; quantization errors; HDTV framestore; 230 Gbit/s

For the purpose of digital recording of HDTV signals (EUREKA standard, 1250/50/2:1) a codec has been realized (HDI-codec) which can reduce the initial data rate from 1152 Gbit/s down to one fifth. According to the desired reduction, the playtime of a digital VCR (video cassette recorder) can be increased from about 40-60 minutes up to at least the length of a feature film. A data rate control unit is described which makes sure that the data rate per frame is kept constant and an optimum distribution of quantization errors is guaranteed. Additionally a description of an HDTV framestore, which uses slow standard FIFOs, is given.