The question is really whether the shifting of one demodulation axis was actually noticeable in the reproduced picture. I suspect that in the lab, and with the pressure to reduce the cost of the receiver, trimming the demodulation circuitry was an important option.
When the CTC2B chassis was offered, it was already nearing obsolescence with the simplified CTC4 already underway. The other distortions in the production and delivery chain in 1955 surely must have offset any noticeable distortion in the displayed picture color transitions.
The original I/Q quadrature modulation scheme was only a means to try and maintain some sort of a minimum chrominance bandwidth which at the end of the day I imagine in practice was not really noticed when it was shaved off.
Quote:
Originally Posted by old_tv_nut
...Whether this is noticeable or not will depend on the subject matter and also on whether the viewer knows what to expect. In most cases, these kinds of distortions do not become strongly apparent unless you have a correct picture to compare to. There might be exceptions for things like colored title letters, which the viewer may assume to originally have uniform color on the left and right edges.
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01-21-2014, 11:44 PM
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