Dobly encoded stereo -> DPLII -> AC3 5.1?

[m455954]

Hi,

Are there tools available that would enable me to take a dolby surround 2ch mix and from that create a DD 5.1 mix by running it through a DPL II decoder?

DPL II creates a true 5.1 channels, and there's no reason those couldn't be re-encoded into AC3 as long as there was a way of capturing them as seperate streams.

This would make it possible to listen to old dolby surround encoded material from a burnt DVD on a DD5.1 amp without having a DPL II capable amp.

Anyone know if this is possible without re-sampling the analogue output of a DPLII card/amp?

Cheers,

Mark

[DSPguru]

this process will degrade quality much more than it will improve it.

your amp can only decode DPL1 ? that's fine.
decoding the original AC3, manipulating it (with DPL2 decoder, for instance), and re-encoding to AC3, is bad for its quality.

[m455954]

no, you misread my post. The starting point is NOT AC3, it's DPL encoded stereo.

DPL2 decoding sounds better than DPL1, so I was wondering if there was a way of taking a STEREO DPL encoded track, passing it through a DPL2 decoder to create seperate channels, and then encoding those as AC3 so that the DPL2 soundtrack could be had without having a DPL2 amp.

sorry for the confusion.

Mark.

[DSPguru]

hmm.. you need to find a dpl2 software decoder..

[m455954]

exactly - I've had a look around but can't find any.

I know PowerDVD can do it, but no idea how to get the different streams out of it without re-sampling an analogue output for each channel - not my preferred route obviously.

is anyone else working on a DPL2 decoder?