km@emory.UUCP (Ken Mandelberg) (08/04/85)
Recently I posted a query about a cryptic reference
in a quote from an article on VCRs in the July 15 Wall
Street Journal:
"Before the end of the year, suppliers are expected to
introduce higher priced units with features that greatly
enhance the picture. The improvements will result from
signal-processing technology borrowed from the broadcast
industry, says David Lachenbruch, editorial director of
Television Digest.."
I now find a "newsbrief" in the September Video Review (reported by
James B. Meigs) that may be what Lachenbruch was refering to:
".. VHS inventor, JVC, has developed a picture enhancing technique
that can compete with the quality boost of Super Beta, say JVC
executives in Japan .. The new process raises the white-clip
level from 160 to 200 percent in pre-emphasis of the video signal.
This should make the picture appear sharper, especially around the
borders of objects. Though it made no previous announcement, JVC
quietly included the enhancement in its HR-D140, HR-D250, and
HR-D555 VCRs already available in the US, and made the technique
available to other VHS manufacturers. Other VHS picture improvements
may be on the way. JVC engineers recently presented a paper
detailing a technique which could visibly reduce video noise. When
might the process be included in VHS decks? JVC execs were mum on
that one."
Does anyone no any more about this? Video Review is a glossy
magazine which presumably freezes editorial material months before
it appears, so there are probably later developments. It would
be interesting to read the JVC paper, but no reference was given.
--
Ken Mandelberg
Emory University
Dept of Math and CS
Atlanta, Ga 30322
{akgua,sb1,gatech,decvax}!emory!km USENET
km@emory CSNET
km.emory@csnet-relay ARPANET