Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-01-30
1990-02-27
Peng, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 11, 358 12, 358142, 358 15, H04N 704, H04N 708, H04N 1120, H04N 1106
Patent
active
049050842
ABSTRACT:
High definition television (HDTV) signals are broadcast in a manner to be compatible with television receivers that operate to reproduce standard definition images, and the broadcast HDTV signals are contained within an existing frequency band in the electromagnetic spectrum allocated for transmission of the standard definition images. An image to be broadcast is scanned with a high definition camera capable of producing an image frame of N lines of resolution, wherein N is equal to about twice the line resolution of a standard definition image frame. The camera produces N/2 odd line image signals and N/2 even line image signals for each image frame. The odd line signals are modulated on a radio frequency (RF) carrier wave to produce HDTV odd line image signals occupying at most the same frequency band in the electromagnetic spectrum as occupied by standard definition images. The even line signals are modulated on a RF carrier wave signal to produce HDTV even line image signals that occupy at most the same frequency band. The HDTV odd line image signals are radiated from a first transmitting antenna to produce first radiated waves of a first polarization, and the HDTV even line image signals are radiated from a second transmitting antenna to produce second radiated waves of a second polarization mutually orthogonal with the first polarization. Reception of HDTV images is carried out with mutually orthogonally polarized antennas matched to the first and the second radiated waves.
REFERENCES:
patent: 2820844 (1958-01-01), Beers
patent: 3617626 (1971-11-01), Bluth et al.
patent: 3830971 (1974-08-01), van de Polder
patent: 4389668 (1983-06-01), Favreau
patent: 4429327 (1984-01-01), Oakley et al.
patent: 4485401 (1984-11-01), Tan et al.
patent: 4521803 (1985-06-01), Gittinger
patent: 4535352 (1985-08-01), Haskell
patent: 4567508 (1986-01-01), Hulyer
patent: 4574300 (1986-03-01), Hulyer
patent: 4605950 (1986-08-01), Goldberg et al.
patent: 4622578 (1986-11-01), Rzeszewski
patent: 4694338 (1987-09-01), Tsinberg
patent: 4707728 (1987-11-01), Hurst
patent: 4720744 (1988-01-01), Washi et al.
M. Javid & P. M. Brown, Field Analysis and Electromagnetics, pp. 293-294 (McGraw-Hill 1963).
R. C. Johnson & H. Jasik, Antenna Engineering Handbook, pp. 23-4 to 23-11 (McGaw-Hill 1984).
R. Angus, "The HDTV Revolution", Popular Electronics, p. 61 et seq, Sep. 1989.
Advertisement for the NEC model IDC-1000 Improved Definition Converter, AV Video at p. 33, Feb. 1989.
Carole Broadcasting Technologies, Inc.
Peng John K.
Zucker Leo
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