Scan conversion apparatus
AssigneeWestinghouse Electric Corp.
InventorPaul G. Kennedy
Life of this patent
Estimating the term…
Abstract
A standard television picture is transmitted over conventional phone lines by sampling and storing one picture element per TV line, and transmitting the information of the stored samples over the phone line as a reduced bandwidth television signal. At the receiver end the transmitted signal is placed into storage and extracted at standard TV rates and written as a TV line onto a rotating video disc. The process is repeated until the final picture to be displayed is assembled on a line-by-line basis on the disc.
Claims14
A system for transmitting a standard television picture over a relatively narrow bandwidth transmission link, comprising:
- A. means providing an information containing television signal scanned in a plurality of television lines each comprised of a plurality of adjacent picture elements;
- B. means for sampling picture elements lying along a line substantially orthogonal to the direction of line scan and deriving a reduced bandwidth television signal therefrom;
- C. means coupling said reduced bandwidth television signal to said transmission link for transmission thereof;
- D. means for receiving and processing transmitted reduced bandwidth television signals and displaying each as a single scanned line.
A system for transmitting a standard television picture over a relatively narrow bandwidth transmission link, comprising:
- A. means for sampling a vertical column of picture elements of a plurality of horizontally scanned television lines;
- B. means for transmitting, over said transmission link, the information represented by said picture elements;
- and
- C. means for displaying said transmitted information of vertically adjacent picture elements as horizontally adjacent picture elements.
A system for transmitting a standard television picture over a relatively narrow bandwidth transmission link, comprising:
- A. a source of television scan lines representative of information to be transmitted, each said scan line being comprised of a plurality of adjacent picture elements to be sampled;
- B. means for sampling one picture element per scanned line, of a predetermined number of lines, per television frame, the picture element being the i.sup.th picture element for each said line;
- C. first storage means for storing the sampled i.sup.th picture elements;
- D. means for transmitting the information represented by said stored picture elements over said transmission link as a reduced bandwidth television signal;
- E. display means;
- F. means for processing and displaying said transmitted reduced bandwidth television signal as a single scan line on said display means.
Dependencies are inferred from the claim text.