DTT decoder CDV-DVB-T PVR 3506 multimedia recovery

[michael chiklis]

Hello,
i need to recover video recorded on hard drive which was inside this DTT decoder:
CDV-DVB-T PVR 3506

Filesystem is Tiny UDF but encrypted, i decrypted it with this tool:
http://www.ulozto.net/xsyReMD/sigmatek- ... reader-zip

now windows shows me UDF partition but there isn't quite nothing inside, very likely because filesystem is damaged.
I tried to recover multimedia files via RAW in R-Studio but all MPEG2 video seem damaged (all frames are very dark and with a lot of noises).

Do you know the proper way how to recover this kind of filesystem or at least how to recover multimedia files in RAW?

Sigmatek.jpg (41.94 KiB) Viewed 4144 times

This is just what i see inside 'StorageLabs TinyUDF Volume' mounted partition with Sigmatek tool:

I physically imaged entire drive with WinHex:

as you can see on pic above bytes need to be inverted every 2, so i modified the image by inverting bytes:

I think what does Sigmatek tool is just inverting bytes in the hard drive on fly, as i did manually on the image via WinHex.
I'm not sure if it Sigmatek does something else besides inverting bytes

After that i created new image with swapped bytes, i loaded it in R-Studio but i can't find any valid multimedia file in RAW.

[michael chiklis]

Thank you all, i finally recovered all videos