Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-09-19
1990-11-27
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 14, H04N 1100, H04N 1102
Patent
active
049740644
ABSTRACT:
A high definition television signal having 525 lines per frame, a sequential scan, and 59.94 frames per second is encoded into a time multiplex signal for transmission. The encoder drops alternate lines, but creates line difference signals which allow reconstruction of the dropped lines at the receiver. The line difference signals are time compressed, while the luminance signals of the alternate, transmitted lines are time expanded. The encoder can accept programs from any one of a plurality of program originators, as long as the frame and line rates are multiples of one another. The time multiplex signal carries luminance and chrominance components in each line, but updates signals such as high frequency luminance, high frequency chrominance and the line difference signals in a predetermined pattern in sequential frames. At the receiver, the time multiplex signal is decoded into the original high definition signal and is further encoded directly into two channels, the first being compatible with NTSC, the second being an augmentation channel. The two channels can later be recombined, for example at a cable receiver, to create the high definition signal, while the first channel signal can be directly received on an NTSC receiver.
REFERENCES:
patent: 3715483 (1973-02-01), Limb et al.
patent: 4485401 (1984-11-01), Tan et al.
patent: 4533936 (1985-08-01), Tiemann et al.
patent: 4605950 (1986-08-01), Goldberg et al.
patent: 4621287 (1986-11-01), Reitmeier et al.
patent: 4633311 (1986-12-01), Gordon et al.
patent: 4652904 (1987-03-01), van de Polder
patent: 4661850 (1987-04-01), Strolle et al.
patent: 4720745 (1988-01-01), De Forest et al.
Marion Michael E.
North American Philips Corporation
Shepperd John W.
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