January 25, 1962

Dr. W.G. Stroud

Goddard Space Flight Center
Bullding T 39

Naval Receiving Station
Anacostia, Virginia

Dear Fills

You asked me about some possible sources of Interest in bandwidth
reduction for video transmission. John Tukey thinks very highly of Or. &.£.
David, Director of Visual and Acoustic Research at Bell Laboratories, Murray
Hall, in this connection.

1 am enclosing what | had In the back of my mind about velocity
modulation. 1 think what Hanel was discussing would be very similar to the
velocity modulation of a derivative signal, but | may be missing something.

Yours sincerely,

Joshua Lederberg
Professor of Genetics

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