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Forum 139

Tech Chat Georges Valensi.

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Till Eulenspiegel
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In 1938 many years before before colour TV broadcasting started as we know it George Valensi invented the method of transmitting luminance and chroma signals. 

From Wikipedia:  Georges Valensi - Wikipedia

Till Eulenspiegel.

 
Posted : 01/02/2024 9:49 pm
ntscuser reacted
Nuvistor
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@till 
I hadn’t heard of this gentleman before, just shows how ideas are built on by others to produce working systems, obviously a forward thinking and very clever man.

 

Frank

 
Posted : 01/02/2024 10:52 pm
Till Eulenspiegel
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From a book titled "Color Television Fundamentals" published in 1955. An explanation how the colour sub-carrier signal is inserted into the gaps in the luma signal harmonics spectrum.  The figures are for the 525 line system but the concept also applies to the PAL system.

NTSC Colour Sub Carrier 1
NTSC Colour Sub Carrier 2

Till Euelenspiegel.

 
Posted : 02/02/2024 3:36 pm
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