Method and apparatus for increasing the definition of an...

Details Method and apparatus for increasing the definition of an... Method and apparatus for increasing the definition of an...

H - Electricity

04

N

350/40, 350/56

H04N 7/06 (2006.01) H04N 11/00 (2006.01) H04N 11/24 (2006.01)

Patent

CA 1332638

METHOD AND APPARATUS FOR INCREASING THE DEFINITION OF AN NTSC SIGNAL USING AN AUGMENTATION CHANNEL ABSTRACT OF THE DISCLOSURE A method for increasing the definition of an NTSC video signal using an augmentation channel involves the generation of both a line summation signal as well as a line difference signal. From the line summation signal, a horizontal detail signal may be derived which may be diagonally filtered and added to a diagonally filtered vertical detail signal and transmitted in a bandwidth of approximately 2.5 mega- hertz. Furthermore. the line summation signal may be applied for the derivation of a standard NTSC video signal which is transmitted sepa- rately from the augmentation channel. Decoder apparatus comprises a single digital diagonal filter having complimentary output functions resulting in both improved horizontal and vertical resolution at low cost.

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