How do I preserve the Dolby Surround when capturing from TV?

[ViperXT]

When I capture Simpsons episodes(which are broadcast in Dolby Surround) and then convert to CVD and burn 'em with Nero, I get no surround sound when hooked up my surround sound reciever. Does converting the audio to PCM 44.1/16 and then to mp2(192 kb/s, 44.1 khz, 16 bit) destroy the surround effects? I thought the surround sound was matrixed in to the stereo signal. I know my reciever is working fine, because I get DD 5.1 in the Simpsons Season 1 DVD set and Pro-Logic sound on the 2 channel track of the same set. Can anyone offer some insight?

[gll99]

You don't say how you encode but if you use tmpgenc use dual channel mode not stereo if you want to preserve the Dolby.

[ViperXT]

thanks for the advice, i have been encoding in stereo mode. I will try dual channel and see if this helps. Thanks again

[yg1968]

I am not sure how you are capturing but wouldn't your sound card have to have a "spdif in" in order to maintain the dolby digital surround sound?

[beta72]

I always use stereo and always ge dolby.

[SatStorm]

The only mode which "destroy" the suround info, is the joint stereo mode
I use Stereo and only stereo in my encodings and when the source is suround, it stays that way....
Dual Stereo for some users is better for lower bitrates. For 192kb/s, Stereo is the most common option (most of DVB broadcasts are 192kb/sec Stereo)

Dolby prologic and prologic 2 are for the audio decoding, the encoding is another subject!

[yg1968]

Am I missing something? How can you have a dolby digital file if you have an analog capture card? Unless you are capturing audio through a spdif-in (i.e. digital in) (available on some Soundblaster soundcard) or unless you are capturing through firewire, I can't see how you could maintain a dolby digital signal upon capturing.

[Mirror_Image]

Dolby digital and dolby surround are not the same animal.

http://home.earthlink.net/~kantack/surround3.htm

[yg1968]

Thanks for the clarification. It's easy to get confused with these terms.