Sampling frequency down-converting apparatus

Details Sampling frequency down-converting apparatus Sampling frequency down-converting apparatus

1990-02-08

1993-04-06

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358138, H04N 712, H04N 1102

Patent

active

052008126

ABSTRACT:
A sampling frequency down-converting apparatus low-pass converts a digital picture signal sampled at a sampling frequency of 8 Fsc by a thinning out operation into the digital picture signal sampled at a frequency of 4 Fsc, and a sampling frequency up-converting apparatus high-pass converts the digital picture signal sampled at 4 Fsc into one sampled at 8 Fsc by interpolation. If the signal is wider in the required zone than the conventional NTSC signal and the PAL signal like the ATV signal, the transmission and the recording may be effected without the deterioration of the frequency characteristics.

REFERENCES:
patent: 4291331 (1981-09-01), Devereaux
patent: 4302776 (1981-11-01), Taylor et al.
patent: 4322739 (1982-03-01), Drewery
patent: 4651208 (1987-03-01), Rhodes
patent: 4912549 (1990-03-01), Altman
patent: 5041906 (1991-08-01), Matsumoto
patent: 5053859 (1991-10-01), Lucas
patent: 5055916 (1991-10-01), Dieterich

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