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Subject: Dead Media Working Note 06.7
Dead Medium: Bell Labs Half-Tone Television
From: house127_AT_teleport.com (Trevor Blake)
Source: RADIO PHYSICS COURSE / An Elementary Text Book on
Electricity and Radio by Alfred A. Ghirardi, E. E.
Second Edition, Revised and Enlarged, Eighth Impression
June 1937, Radio & Technical Publishing Co. 45 Astor Place, New York
City
(((In discussing how an image may be sliced into elements
for transmission, the half-tone process used in newspaper
photography is explained. Immediately following is this
curiosity.)))
"It is evident from this discussion of half-tone
reproductions, that in television, it is really not
necessary to transmit and reproduce the entire scene as a
single unit each 1/20 of a second. We may split up the
scene viewed by the television transmitter, into
elementary dots, transmit electrical vibrations
corresponding to the brightness or darkness of each
individual dot, and reproduce the dots in the same
relative order and position at the receiving end. Then
our received picture will be made up of a number of dots
similar to a half-tone, and if the elements are small
enough it will be acceptable. This system has actually
been used by Dr. Ives at the Bell Telephone Laboratories,
but since a separate circuit was necessary for each
element or dot (2,500 circuits in all in this particular
apparatus), the system was very complicated and
commercially impractical."
Trevor Blake
127 House - An Independent Archive of Systematic Ideology
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| 04.1-06.0 | 06.1-08.0 |
08.1-10.0 | 10.1-12.0 |