Railway mail delivery – Projectors
Patent
1990-08-15
1991-11-12
Britton, Howard W.
Railway mail delivery
Projectors
358 22, 358140, H04N 545
Patent
active
050652435
ABSTRACT:
Current television signals are converted into sequential scanning signals in a sequential scanning conversion circuit and supplied to a memory circuit. In the memory circuit, the sequential scanning signals are converted into interlaced scanning signals, and then the signals are time-compressed and converted into small screen signals. High-definition television signals decoded by a MUSE decoder are supplied to a selector as master screen signals. In the selector, the master and slave screen signals are selectively produced to form a picture-in-picture signal.
REFERENCES:
patent: 4982288 (1991-01-01), Isobe et al.
Britton Howard W.
Kabushiki Kaisha Toshiba
Vu Kim Yen
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