Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-08-31
1991-07-02
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358140, H04N 700, H04N 1100
Patent
active
050290029
ABSTRACT:
A high definition television system includes an encoder for encoding a video source signal having a horizontal bandwidth of about 28-30 MHz for transmission through a 6 MHz RF channel. The video source signal is provided in the form of a plurality of horizontal video lines occurring at a vertical rate equal to the NTSC field repetition rate and at a predetermined horizontal rate greater than the NTSC horizontal scanning rate. The video lines of the source signal are encoded for transmission at NTSC vertical and horizontal rates, with the lines representing the lower frequencies of the video source signal being transmitted at a higher temporal rate than the lines representing the higher frequencies. The transmitted lines are converted to a plurality of display lines by a receiver for display at a vertical rate equal to the NTSC field repetition rate and at a horizontal rate equal to the predetermined horizontal rate.
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Citta Richard W.
Lee Ronald B.
Parker Michael D.
Shepperd John W.
Zenith Electronics Corporation
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