H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/53
H04N 5/45 (2006.01) H04N 5/272 (2006.01)
Patent
CA 1295729
ABSTRACT OF THE DISCLOSURE A picture-in-picture video signal generator includes a source of an auxiliary video signal, and a producer of successive samples representing the auxiliary video signal. A self-sequencing memory includes a data input terminal coupled to the producer of auxiliary video samples; a write address input terminal, for receiving an initial write address; a data output terminal and a read address input terminal for receiving an initial read address. Write control circuitry is coupled to the write address terminal of the self-sequencing memory, and generates initial write addresses in synchronism with horizontal line intervals of the auxiliary video signal. A source of a main video signal is also provided. Read control circuitry is coupled to the read address terminal of the self-sequencing memory, and generates initial read addresses in synchronism with horizontal line intervals of the main video signal. Means are provided for combining the main video signal with samples from the self-sequencing memory to form a video signal representing a picture-in- picture image.
561120
Craig Wilson And Company
Rca Licensing Corporation
LandOfFree
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