03-11-2023, 06:51 AM
In the early 1980s I worked for Michael Cox Electronics who made true SECAM vision mixers. When a picture had to be faded, it was switched to a special and complex path with attendant drop in picture quality. The Y and C were separated by filters - there's no possibility of a comb filter. Then partial decoding of the alternating Db/Dr signal to baseband, though normal mixer kit and the whole lot reassembled.
Absolutely evil.
A few diehard SECAM broadcasters used this sort of kit (ISTR the Bulgarians were true believers) but most simply worked in PAL and transcoded for transmission. It's hardly surprising that France was a leading light in the development of component techniques for the studio. I also remember the monstrous switchers and mixers which had 3 parallel channels for Y, Cb, Cr. Betacam VCRs (Betamax size cassettes but very different formulation and electronics) recorded the component signal. There were also the relatively rare M and M2 formats based loosely on VHS cassettes.
Absolutely evil.
A few diehard SECAM broadcasters used this sort of kit (ISTR the Bulgarians were true believers) but most simply worked in PAL and transcoded for transmission. It's hardly surprising that France was a leading light in the development of component techniques for the studio. I also remember the monstrous switchers and mixers which had 3 parallel channels for Y, Cb, Cr. Betacam VCRs (Betamax size cassettes but very different formulation and electronics) recorded the component signal. There were also the relatively rare M and M2 formats based loosely on VHS cassettes.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
