Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1982-09-10
1984-11-27
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 12, 358188, H04N 548, H04N 538
Patent
active
044854013
ABSTRACT:
A compatible television system for high-definition and for standardized low-definition television. In a transmitter (1) in the system, a high-definition video signal (VS1) is generated which is split into a contour signal (HVC2) which on display shows details in the horizontal and vertical directions, and a low-definition video signal (VS6). The low-definition video signal (VS6) is converted into a low-definition video signal (VS7) in conformity with the standard. The contour signal (HVC2) is also converted, but is transmitted periodically over several picture periods (HVC3). Both these converted signals are transmitted or stored, respectively, in two separate signal channels (3,4), each suitable for standard low-definition television. In a receiver (2) the standard video signal (VS7) can be utilized directly for low-definition display by a standard display device (8). In addition, a receiver (2) comprises a high-definition display device (7) in which the converted signals are reconverted and, after having been combined (48) result in a high definition video signal suitable for high-definition display by a picture display apparatus (49 ). As high-definition in the region of movement in the picture may disturb the picture quality, the contour signal may be locally suppressed on display.
REFERENCES:
patent: 4107736 (1978-08-01), Lowry
patent: 4168509 (1979-09-01), Hartmann
patent: 4210927 (1980-07-01), Yumde
patent: 4310850 (1982-01-01), Casler
patent: 4322750 (1982-03-01), Lord
High Definition Television System-Signal Standard and Transmission, Fujio, SMPTE Journal, vol. 89, Aug. 1980, pp. 579-584.
Standards Conversion of a TV Signal with 625 Lines into Videophone Signal with 313 Lines Van Buul, Philips Res. Repts. 28, 377-390, 1973.
Hayashi, Research and Developement on High Definition Television in Japan, SMPTE Journal, Mar. 1981, pp. 178-186.
Kremers Theodoor M. M.
Tan Sing L.
Van De Polder Leendert J.
Briody Thomas A.
Goodman Edward W.
Masinick Michael A.
Streeter William J.
U.S. Philips Corporation
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