Abstract
In this paper we consider consumer digital HDTV recording, using small magnetic recording mechanics and advanced bit-rate reduction techniques. A system concept based on the existing 8 mm tape format is described, which opens the possibility for designing a small portable recorder suited for digital HDTV and SDTV recordings for home use. It appears that, when a system is worked out which can cope with 25 Hz and 30 Hz environments, only a very few recording bit-rates are applicable. At the same time, an elegant possibility for recording SDTV and HDTV on the same machine should be maintained. Since small recording mechanics are proposed, HDTV signals must be substantially compressed to obtain sufficient playing time. For this reason, motion-compensated DCT coding of HDTV signals has been studied for digital home-use HDTV recording, because high-quality images can be obtained with a compression factor of 7–10. The total recording system concept would result in 2 hours playing time for HDTV and 4 hours for SDTV, using an 8 mm-type cassette.
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