
DV compression
39
Concerning DVC recording, see
page 422. D-7 is the SMPTE
standard corresponding to
DVCPRO and DVCPRO 50;
D-9 corresponds to DigitaI-S.
DV
denotes the compression and data packing scheme
used in consumer
digital video cassette
(DVC) recorders
and their professional derivatives. DV compression uses
discrete cosine transform (DCT), quantization, and vari-
able-length encoding (VLE) comparable to JPEG;
however, DV does not
conform
to the JPEG standard:
Optimizations have been made to accommodate inter-
laced scanning, constant bit-rate (CBR) operation, and
other features related to videotape