Digital TV having on-screen display feature

Details Digital TV having on-screen display feature Digital TV having on-screen display feature

1987-04-29

1988-08-30

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358181, 358183, H04N 5262, H04N 5268

Patent

active

047680830

ABSTRACT:
A television pix-in-pix system includes a pixel memory for storing one field of pixel intensity values of a television signal. A 1-bit overlay indication signal representative of pixel address locations defining a desired indicia on the TV screen is stored in an associated bit map memory. A digital multiplexor having input terminals coupled for respectively receiving the pixel intensity values and suitable overlay display values, and responsive to the overlay indication signal, provides the overlay display values when the overlay indication signal is a logical one, and provides the pixel intensity values otherwise, thereby generating the desired indicia as a part of the inset image on the TV screen.

REFERENCES:
patent: 3812285 (1974-05-01), Miyata et al.
patent: 4249212 (1981-02-01), Ito
patent: 4559561 (1985-12-01), Amano et al.
patent: 4638360 (1987-01-01), Christopher et al.
patent: 4665438 (1987-05-01), Miron

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