Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-09-02
1991-01-08
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 11, 358 12, 358140, H04N 701, H04N 704, H04N 1120, H04N 1106
Patent
active
049840789
ABSTRACT:
An extended definition television (EDTV) system transmits, receives and displays both EDTV and NTSC signals using a NTSC channel bandwidth. The system procudes an EDTV broadcast signal having a picture with a 16:9 aspect ratio and at least one adjacent horizontal border to produce an overall image apsect ratio of 4:3. Picture information is also selectively modulated onto the horizontal border. The EDTV broadcast signal is transmitted in a NTSC format, and a receiving circuit is provided comprising a display with a 16:9 aspect ratio, a detector for determining whether an EDTV or other type of signal is being received, and an expansion circuit responsive to the detector to produce an expanded picture for display. When an EDTV signal is received, it is expanded and filtered vertically and is expanded horizontally and the 16:9 picture is displayed on the 16:9 display. The receiving circuit derives picture information from both the picture portion and the border portion of the EDTV signal. When an NTSC signal is received, it is displayed on the 16:9 display with at least one vertical border so that the NTSC picture has a 4:3 aspect ratio. The EDTV signal is also compatible with and may be received and displayed on standard NTSC receivers as a 16:9 picture with at least one horizontal border.
REFERENCES:
patent: 4521803 (1985-06-01), Gittinger
patent: 4551754 (1985-11-01), Meise et al.
patent: 4622577 (1986-11-01), Reitmeier et al.
patent: 4652904 (1987-03-01), Van der Polder
patent: 4661850 (1987-04-01), Strolle et al.
patent: 4672443 (1987-06-01), Dischert et al.
patent: 4677483 (1987-06-01), Dischert et al.
patent: 4694337 (1987-09-01), Lyons
patent: 4698673 (1987-10-01), Johnson
patent: 4831441 (1989-05-01), Ando
"DICE: The First Intercontinental Digital Standards Converter" by Baldwin et al.-The Royal Television Society Journal; vol. 15, No. 5, pp. 140-159 Sep.-Oct. 1974.
"Standards Conversion of a Videophone Signal with 313 Lines Into a TV Signal with 625 Lines", by M.C.W. van Buul et al., Philips Res. Rept. 29, pp. 413-428, 1974.
"Digital Standards Converter by Adaptive Intra-Frame Line Interpolation"; by Kinuhata et al. IEEE 1978 pp. 1413-1420.
"Fall Screen TV Standards Converter: Changes American to European Standards Without Reducing Picture Size and Allows Output to be Locked to Local sources" by Davies, BBC Research Dept.
"An Extended Definition Television System Using Quadrature Modulation of the Video Carrier with Inverse Nyquist Filter," by Yoshio Yasumoto, et al., IEEE Transactions on Consumer Electronics, Aug. 1987.
Bingham Joseph P.
Skinner Kenneth R.
Marion Michael E.
North American Philips Corporation
Parker Michael D.
Shepperd John W.
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