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Hardware codec for digital HDTV recording


Ohta, N. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; European Optical Society -EOS-:
High-definition video : 5 - 6 April 1993, Berlin, FRG, held as part of the International Symposium on Video Communications and Fiber Optic Networks
Bellingham/Wash.: SPIE, 1993 (SPIE Proceedings Series 1976)
ISBN: 0-8194-1222-8
Conference on High Definition Video <1993, Berlin>
International Symposium on Video Communications and Fiber Optic Networks <1993, Berlin>
Fraunhofer HHI ()
codecs; data compression; discrete cosine transforms; high definition television; image coding; video recording; interframe editing; digital HDTV recording; hardware realization; data rate reduction; adaptive interframe/intrafield discrete cosine transform; dct; adaptive quantization; variable length encoding; vlc; multiple copy; shuttle mode; code architecture

For the recording of HDTV signals (EUREKA standard, 1250/50/2:1) a codec has been realized which can reduce the initial data rate from 1.152 GBit/s 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 to at least the length of a feature film. This paper describes the hardware realization of the data rate reduction codec. Algorithms utilized are adaptive interframe/intrafield discrete cosine transform (DCT), adaptive quantization and variable length encoding (VLC). Interframe editing, multiple copy and shuttle mode are supported by a special code architecture.