Dolby Surround

bgolsen · 26th March 2004, 22:16

I plan to capture my old VHS tapes and put them n vcd or dvd - I just wonder what happens with the Dolby Surround sound. I'd like to kep the surround sound, maybe convert it to dts, but will the capturing result in the loss of the surround matrix?

jggimi · 26th March 2004, 22:54

Dolby Surround (TM) is part of the analog stereo signal. If your capture equipment captures in stereo (not all do), then the surround information will be retained.

26th March 2004, 23:09

And you need to encode in "joint stereo" mode, is that right?

jggimi · 26th March 2004, 23:14

I think you may have that backwards. Dolby Surround works by exploiting separation. If you use Joint Stereo, you might put the surround information at risk.

See http://www.dtg.org.uk/reference/glos...int_stereo.htm

bgolsen · 26th March 2004, 23:53

Thanks jggimi

KpeX · 27th March 2004, 00:14

As long as M/S joint stereo is used, joint stereo will preserve Dolby Surround information. This means that for MP3 (lame encoder) and AAC for sure, joint stereo is fine. For MP2 however, full stereo should definitely be used.

However, this is debated from time to time. And you will never lose surround information using full stereo.

jggimi · 27th March 2004, 00:16

thanks for the clarification, Kpex!

26th March 2004, 22:16	#1 \| Link
bgolsen Registered User Join Date: Mar 2004 Location: Denmark Posts: 3	Dolby Surround I plan to capture my old VHS tapes and put them n vcd or dvd - I just wonder what happens with the Dolby Surround sound. I'd like to kep the surround sound, maybe convert it to dts, but will the capturing result in the loss of the surround matrix?

26th March 2004, 22:54	#2 \| Link
jggimi Moderator Emeritus Join Date: Dec 2001 Location: The NW corner of Lake Erie Posts: 5,552	Dolby Surround (TM) is part of the analog stereo signal. If your capture equipment captures in stereo (not all do), then the surround information will be retained. __________________ "It is easier for a camel to pass through the eye of a needle if it is lightly greased." Kehlog Albran, The Profit

26th March 2004, 23:14	#4 \| Link
jggimi Moderator Emeritus Join Date: Dec 2001 Location: The NW corner of Lake Erie Posts: 5,552	I think you may have that backwards. Dolby Surround works by exploiting separation. If you use Joint Stereo, you might put the surround information at risk. See http://www.dtg.org.uk/reference/glos...int_stereo.htm __________________ "It is easier for a camel to pass through the eye of a needle if it is lightly greased." Kehlog Albran, The Profit

27th March 2004, 00:14	#6 \| Link
KpeX Registered User Join Date: Jun 2003 Location: Great Lakes, USA Posts: 1,433	As long as M/S joint stereo is used, joint stereo will preserve Dolby Surround information. This means that for MP3 (lame encoder) and AAC for sure, joint stereo is fine. For MP2 however, full stereo should definitely be used. However, this is debated from time to time. And you will never lose surround information using full stereo. __________________ KpeX Audio FAQs: General \| BeSweet \| SVCD/MP2 \| MP3 \| Vorbis \| AC3 \| DTS \| AAC Linux Audio/Video FAQ

27th March 2004, 00:16	#7 \| Link
jggimi Moderator Emeritus Join Date: Dec 2001 Location: The NW corner of Lake Erie Posts: 5,552	thanks for the clarification, Kpex! __________________ "It is easier for a camel to pass through the eye of a needle if it is lightly greased." Kehlog Albran, The Profit

26th March 2004, 23:09	#3 \| Link
FlimsyFeet Guest Posts: n/a	And you need to encode in "joint stereo" mode, is that right?

26th March 2004, 23:53	#5 \| Link
bgolsen Registered User Join Date: Mar 2004 Location: Denmark Posts: 3	Thanks jggimi