Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1997-08-11
2000-03-21
Olms, Douglas W.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
348423, 348584, 348563, 370535, 380 10, H04J 302, H04N 712, H04N 974, H04N 5445
Patent
active
06041068&
ABSTRACT:
A device for deriving an ancillary signal from a compressed digital video signal (e.g. MPEG), wherein the ancillary signal includes selected parts of the main signal, for example, the DC coefficients of I-pictures, or the unscrambled parts, which parts can be used for display in a (multi-) picture-in-picture television receiver, or as an "appetizer" in order to encourage the user to pay a subscription fee, is described. The ancillary signal can separately be recorded in digital video recorders so as to assist the user in finding the beginning of a scrambled program on tape. The ancillary signal can also be generated at the transmitter end and transmitted at a low bit rate. A decoder for decoding such an ancillary signal is considerably simpler and less expensive than a full-spec MPEG decoder. A decoding method is also described.
REFERENCES:
patent: 3580989 (1971-05-01), Banning
patent: 5091785 (1992-02-01), Canfield et al.
patent: 5377266 (1994-12-01), Katta et al.
patent: 5420866 (1995-05-01), Wasilewski
patent: 5426699 (1995-06-01), Wunderlich et al.
patent: 5450209 (1995-09-01), Niimura et al.
patent: 5483287 (1996-01-01), Siracusa
patent: 5485221 (1996-01-01), Banker et al.
patent: 5504484 (1996-04-01), Wilson
patent: 5504530 (1996-04-01), Obikane et al.
patent: 5515107 (1996-05-01), Chiang et al.
patent: 5515437 (1996-05-01), Katta et al.
patent: 5576902 (1996-11-01), Lane et al.
patent: 5598222 (1997-01-01), Lane
patent: 5600573 (1997-02-01), Hendricks et al.
patent: 5600721 (1997-02-01), Kitazato
patent: 5631693 (1997-05-01), Wunderlich et al.
"ISO/IEC CD 13818: Information Technology-Generic Coding of Moving Pictures and Associated Audio Information" 1993 12-01.
"ISO/IEC CD 13818-2: Information Technology--Generic Coding of Moving Pictures and Associated Audio Information" Part 2: Video 1993 12-01.
Persoon Eric H. J.
Rosengren Jurgen F.
Saeijs Ronald W. J. J.
Gathman Laurie E.
Olms Douglas W.
U.S. Philips Corporation
Vincent David R
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