Compatible HDTV with increased vertical and horizontal resolutio

Details Compatible HDTV with increased vertical and horizontal resolutio Compatible HDTV with increased vertical and horizontal resolutio

1984-12-28

1987-11-17

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358141, H04N 708

Patent

active

047077280

ABSTRACT:
A high-definition camera uses sinuous scanning to produce wide-bandwidth signals having high definition in the horizontal direction as well as in the vertical direction. A lowpass filter produces a limited-bandwidth signal from the wideband signal. The limited-bandwidth signal is compatible with standard television broadcast systems and receivers. A subtracting circuit compares the wide-bandwidth and limited-bandwidth signals to produce a delta signal representative of the difference. The delta signal exists only in regions of fine detail which cannot be resolved by the limited-bandwidth signal. The delta signal and its address are transmitted to the receiver together with the limited-bandwidth signal. At the receiver, the high-definition image is recreated by operation of the delta signal on the limited-definition signal. The delta signal and its addresses may be transmitted during the vertical blanking interval. In order to reduce the data rate of the delta signal, its generation is inhibited in regions of the picture which exhibit frame-to-frame motion.

REFERENCES:
patent: 3006991 (1961-10-01), Cherry et al.
patent: 3715483 (1973-02-01), Limb et al.
patent: 4057835 (1977-11-01), Kinuhata et al.
patent: 4107736 (1978-08-01), Lowry et al.
patent: 4168509 (1979-09-01), Hartmann
patent: 4268861 (1981-05-01), Schreiber et al.
patent: 4364090 (1982-12-01), Wendland
Paper by Professor W. Wendland entitled "Development Options for Future Television Systems" and presented by Mike Hausdorfer to the SMPTE High-Definition Study Group on May 7, 1981.

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