04237484 is referenced by 178 patents and cites 10 patents.

Supplementary digital data is encoded together with a video signal by predicting the intensity values of a first set of video samples, compressing the range of the prediction errors and superimposing a value indicative of the supplementary data on the compressed value. The samples in the first set may be selected in a regular sequence or asynchronously in accordance with a function of the video signal such as the slope in the area of the picture being processed; the composite values are time multiplexed with the remaining intensity values.

Title
Technique for transmitting digital data together with a video signal
Application Number
6/64918
Publication Number
4237484
Application Date
August 8, 1979
Publication Date
December 2, 1980
Inventor
Arun N Netravali
Matawan
NJ, US
Earl F Brown
Piscataway
NJ, US
Agent
Barry H Freedman
Assignee
Bell Telephone Laboratories Incorporated
NJ, US
IPC
H04N 7/08
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