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Considerations on new primaries for high definition television

: Schäfer, R.; Chen, S.-C.


IEEE transactions on consumer electronics 34 (1988), No.3, pp.513-522
ISSN: 0018-9308
ISSN: 0098-3063
International Conference on Consumer Electronics (ICCE) <7, 1988, Rosemont/Ill.>
Journal Article, Conference Paper
Fraunhofer HHI ()
codecs; colour television; encoding; high definition television; television standards; colour tv spectrum; bbc standard colour card; constant-luminance-coding; codec; HDTV; receiver; camera primaries; hd-mac system; calorimetric distortions; decoder

A constant-luminance-coding (CIELAB) codec is presented for high-definition TV (HDTV) use that offers the possibility of enlarging the reproducible color TV spectrum by selecting a new set of primary colors. Tests on a BBC standard color card showed that this type of processing gives full flexibility for the choice of receiver and camera primaries and transparency for the transmission of all real surface colors. Subjective tests were carried out to investigate the importance of a wider color spectrum and the acceptability of CIELAB coding in a compatible HD-MAC system. It was found that more saturated primaries help to minimize calorimetric distortions if CIELAB coded signals are decoded by a conventional decoder.