Originally Posted by 4DHD
As I've said b4, there is Dolby Stereo, and it is consumer, I also made mention of the '78 film Grease as being one of those releases, on VHS.
denvertrakker was wrong in saying its not a consumer format. But these days you rarely see it on DVD. As most titles are Dolby Digital multichannel.
The basic Dolby Stereo is an analog 2 channel format with matrix encoding to make it up to 4 channel. It is not a format that is available on DVD. A DVD may have the mutant DD (digital not analog) Dolby Surround (analog matrix) format encoded on it.
VHS is an analog format, and DVD is a digital format.
As far as I know, Dolby Surround and Dolby Stereo are the same thing. Matrix 2 channel analog content that requires a decoder.
Theaters used a Dolby Stereo decoder (analog). Have you ever seen a consumer product that has a Dolby Stereo decoder in it? A Dolby Pro Logic decoder pretty much equates to a Dolby Stereo decoder.
The three earliest consumer decoders:
Dolby Surround L, R, Mono Surround
Dolby Pro Logic L, C, R, Mono Surround
Dolby PL-2 L, C, R, Stereo Surround