Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1984-04-27
1987-04-28
Cardillo, Raymond F.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358133, 358135, 375122, 360 91, 360 32, 360 331, H04N 592, H04N 713, H04N 712
Patent
active
046618627
ABSTRACT:
A wide-aspect-ratio HDTV signal having 1600 luminance pixels/32 .mu.S line and 980 lines/frame is data reduced by deleting odd pixels of each line of TV field #1 and even pixels of each line of TV field #2 to produce 800 pixels per line, and is further data compressed by a form of differential-pulse-code modulation. The DPCM organizes the pixels into groups of five, and for each group transmits or records one reference pixel at full N-bits. The pixels to the right and left of the reference pixel are compared therewith to produce difference signals of M bits, where M<N. The remaining two pixels of each group are compared with reference pixels from the lines above and below to form M-bit difference signals. The difference signals are transmitted. The DPCM coding reduces the 800 pixels/line to the equivalent of 480 pixels/line. The color portion of the wide-aspect-ratio HDTV is similarly coded to produce the equivalent of 240 pixel/line. The 480 luminance samples and 240 color samples are added to form 720 samples/line, or 1440 samples/64 .mu.sec which can be accommodated by a CCIR-standard-601 signal processing system.
REFERENCES:
patent: 2905756 (1959-09-01), Graham
patent: 2921124 (1960-01-01), Graham
patent: 3403226 (1968-09-01), Wintringham
patent: 3715722 (1973-02-01), Hall
patent: 3739083 (1973-06-01), Leiboff et al.
patent: 3769451 (1973-10-01), Connor
patent: 3772458 (1973-11-01), May et al.
patent: 3784737 (1974-01-01), Waehner
patent: 3825832 (1974-07-01), Frei et al.
patent: 4155097 (1979-05-01), Lux
patent: 4200886 (1980-04-01), Musmann et al.
patent: 4204227 (1980-05-01), Gurley
patent: 4334246 (1982-06-01), Saran
patent: 4353096 (1982-10-01), Sakurai
patent: 4429327 (1984-01-01), Oakley et al.
patent: 4430670 (1984-02-01), Metravali
patent: 4438452 (1984-03-01), Powers
patent: 4468708 (1984-08-01), Coleman, Jr.
patent: 4531151 (1985-07-01), Hentschke
patent: 4541012 (1985-09-01), Tescher
patent: 4551754 (1985-11-01), Meise et al.
patent: 4562426 (1985-12-01), Forney, Jr.
patent: 4562467 (1985-12-01), Bradley
Kerns H. Powers paper describing Wide-Aspect Angle Television, HDTV, 13.5 MHz Transmission given at SMPTE 123rd Technical Conf., Los Angeles, Oct. 25-30, 1981 published in SMPTE Journal Dec. 1982.
Article High Definition Television Studies on Compatible Basis with Present Standards by Broder Wendland, published in SMPTE Television Technology in the 80's.
Article Questions on the Orientation of Research in HDTV in the 80's by Joseph Polansky, published in SMPTE in Television Technology in the 80's.
"A Digital Standards-Converter for Television Using Intra-Frame Line Interpolation Techniques" by Kinuhate et al., published in International Conference on Communications, Jun. 1974, IEEE.
Delta Modulation or DPCM as described in Conditional Vertical Subsampling--A Technique to Assist in the Coding of Television Signals" by Pease, Bell System Technical Journal, vol. 51, No. 4, Apr. 1972.
"Television Standards Converter Using Digital Technique", published in The Radio and Electronic Engineer, vol. 43, No. 3, Mar. 1973.
"Developments in Standards Conversion" by Clarke et al., read at International Broadcasting Convention, Sep. 1978 in London.
Cardillo Raymond F.
Coalter R. G.
Emanuel P. M.
Rasmussen P. J.
RCA Corporation
LandOfFree
Differential PCM video transmission system employing horizontall does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Differential PCM video transmission system employing horizontall, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential PCM video transmission system employing horizontall will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-480341