Dalvi decoder

Does anyone how to create a dalvi decoder? Pls if you have any datasheet any circuit diagram, blocks.

Dolby decoder ?

Dalvi decoder for analog cable coded chanels
My provider uses
DV100 www.dalvi.co.uk/pdfs/DV100.pdf
dsr400 www.technetix.plc.uk/products/section_c/c2/dhr200.pdf

for PAL
Technical Specification: Active Line Cut & Rotate.
Cut position is dynamic and random in one of 256 positions
Optional Audio Descrambling:
Scrambling system: Spectrum inversion
Frequency Response: 100Hz to 11kHz ±3dB

Scrambling system: Spectrum inversion... old ...

moretv-> wilma program for PC

Your search canal plus

http://www.ayudadigital.com/video/manual_ver_canalplus.htm
http://www.ayudadigital.com/video/manual_ver_canalplus.htm

http://es.geocities.com/ketoc2k3/Files/Elect/adecod.pdf

Spectrum inversion is just for audio scrambling.
for video they cut each line in 2 parts. the cuting point can be done in 256 positions on a line. After the cut the lines are rotated (the first part becomes the second part). the system is pseudo digital because they convert the chanels (HBO, DISCOVERY TRAVEL....) from analog to digital make the coding and convert back to analog. It is something like Videocypt systems. if you have something for videocrypt decoding it might help me.