Extended horizontal resolution of luminance and chrominance in a

Details Extended horizontal resolution of luminance and chrominance in a Extended horizontal resolution of luminance and chrominance in a

1987-08-13

1989-10-10

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358141, 358 11, H04N 704

Patent

active

048735671

ABSTRACT:
Method and apparatus for extending the horizontal resolution of the luminance and chrominance video signals in a two-channel HDTV system, requiring no increase in channel bandwidth. High-frequency components of luminance and chrominance of a wide bandwidth source signal are bandpass filtered, vertically decimated, time expanded, and heterodyned into frequency interleaved relationship with each other and with a line differential signal to produce an enhancement package carried in a designated time and frequency slot on the second channel. At the receiver, the various signal components are recombined to substantially reproduce the source signal for display.

REFERENCES:
patent: 4521803 (1985-06-01), Gittinger
patent: 4622578 (1986-11-01), Rzeszewski
Turner, R., "Some Thoughts on Using Comb Filters in the Broadcast Television Transmitter and at the Receiver", IEEE Transactions on Consumer Electronics, vol. CE-23, No. 3, 8/77, pp. 248-257.

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