Frequency converter for a digital chrominance modulator

Details Frequency converter for a digital chrominance modulator Frequency converter for a digital chrominance modulator

1989-09-11

1990-09-11

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 23, H04M 1122

Patent

active

049567012

ABSTRACT:
A frequency converter circuit for converting the frequency of a Hi-Vision carrier chrominance signal into the frequency of an NTSC signal includes a buffer memory wherein color signal data are written in according to a writing signal derived from the Hi-Vision (source) subcarrier frequency, and color signal data are read out according to a reading signal derived from the NTSC (target) subcarrier frequency. The reading signal may correspond to a delayed writing signal, which is delayed by a time derived from the target subcarrier frequency.

REFERENCES:
patent: 4500908 (1985-02-01), Mandeberg
patent: 4845546 (1989-07-01), Dischert et al.

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