4 ms·
> The audio stream is interleaved at the end of the blocks. If I remember correctly, audio was transmitted on a subcarrier some 6 or so MHz higher? Edit: Late
by aivisol 6y ago
> The audio stream is interleaved at the end of the blocks.
If I remember correctly, audio was transmitted on a subcarrier some 6 or so MHz higher?
Edit: Later in the article it is actually stated: "A normal SECAM signal uses FM on a 6Mhz carrier"
- FraKtus 6y agoThe sound just had the spectrum inverted. That's why when inverted it was sounding like crickets speaking. You could unscramble the sound just by multiplying it with the right sine wave at the right frequency. I remember prototyping that with a modular synthesizer :-)
- hyakosm 6y agoFrench SECAM was broadcasted in « L » (heritage from black & white 819 lines « E »), with positive image modulation and audio transmitted in AM. (https://fr.wikipedia.org/wiki/Norme_et_standard_de_t%C3%A9l%C3%A9vision#S%C3%89CAM_:_S%C3%A9quentiel_couleur_%C3%A0_m%C3%A9moire https://fr.wikipedia.org/wiki/Norme_et_standard_de_t%C3%A9l%...)