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Satellite TV receivers & systems support forums
Analogue systems
Need help with understanding encryption. Namely Oak Orion.
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<blockquote data-quote="Captain Jack" data-source="post: 1154510" data-attributes="member: 243342"><p>That's before FilmNet switched to D2MAC. Prior to that they used a modified Irdeto/Oak system called SATPAC. I have a few decoders in the loft. Similarly, RTL4 used Luxcrypt - again based on Oak Orion but without scrambled audio.</p><p></p><p>From what I know (and it isn't a lot), Oak replaced h and v-sync pulses with a ~2MHz sine wave. They also had a picture inversion bit - perhaps based on APL (average picture level), which indicated whether a picture is inverted or not. I believe this was done at field or frame level. The whole picture level (including pulses and blanking areas) was also reduced to 0-0.7V.</p><p></p><p>I'd be very interested in following your work. We tried to get RTL4 decoders working with hacktv but without much luck so far.</p></blockquote><p></p>
[QUOTE="Captain Jack, post: 1154510, member: 243342"] That's before FilmNet switched to D2MAC. Prior to that they used a modified Irdeto/Oak system called SATPAC. I have a few decoders in the loft. Similarly, RTL4 used Luxcrypt - again based on Oak Orion but without scrambled audio. From what I know (and it isn't a lot), Oak replaced h and v-sync pulses with a ~2MHz sine wave. They also had a picture inversion bit - perhaps based on APL (average picture level), which indicated whether a picture is inverted or not. I believe this was done at field or frame level. The whole picture level (including pulses and blanking areas) was also reduced to 0-0.7V. I'd be very interested in following your work. We tried to get RTL4 decoders working with hacktv but without much luck so far. [/QUOTE]
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Need help with understanding encryption. Namely Oak Orion.
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