04233628 is referenced by 211 patents and cites 1 patents.

A Teletext equipped NTSC television receiver system includes means for compressing the raster in the vertical direction in response to 625-line formatted Teletext signals to display normally overscanned horizontal lines on the television viewing screen. Thus 625-line formatted Teletext material may be used directly with NTSC receivers.

Title
NTSC receiver useable with Teletext/Viewdata information
Application Number
6/2523
Publication Number
4233628
Application Date
January 11, 1979
Publication Date
November 11, 1980
Inventor
Walter S Ciciora
Park Ridge
IL, US
Agent
Thomas E Hill
Assignee
Zenith Radio Corporation
IL, US
IPC
H04N 3/22
H04N 7/08
View Original Source