Line tripler for NTSC/HDTV dual receiver

Details Line tripler for NTSC/HDTV dual receiver Line tripler for NTSC/HDTV dual receiver

1993-10-27

1996-01-16

Groody, James J.

Television

Format conversion

Conversion between standards with different aspect ratios

348556, 348458, 348448, H04N 701

Patent

active

054852170

ABSTRACT:
A line tripler for an NTSC/HDTV dual receiver includes a control signal generation section for generating write enable signals and read enable signals. A FIFO line memory section writes each line of an NTSC video signal three times at a predetermined write sampling rate in response to the write enable signals from the control signal generation section to triple each line. The memory section sequentially outputs the stored three lines of the NTSC video signal at a predetermined read sampling rate in response to the plurality of read enable signals from the control signal generation section. The increase in the number of samples of each line of the NTSC video signal is made possible by adjusting the sampling rate or clock signal frequency in reading the stored three lines of the NTSC video signal. A format of the NTSC signal can be converted into an HDTV format of 16:9 or 4:3 aspect ratio.

REFERENCES:
patent: 5173774 (1992-12-01), Bretl et al.
patent: 5218436 (1993-06-01), Sugiyama et al.
patent: 5231490 (1993-07-01), Park

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