rana wrote:
DTS arrived with Jurassic Park. Dolby Digital, I think came later to catch up with DTS.
Sony competed much later. It has lots of support from themselves as Sony owns Columbia. Also, AMC theatres in Canada USA have SDDS as default audio system (some theatres have DTS). NO DOLBY DIGITAL. So beware any Indian film playing at AMC, you don't get DD, you just get back-up Dolby SRD which is Digital but only front channels.
Rana
Rana, here are a few corrections to your post:
Dolby Digital (Batman Returns, 1992) is an older system than DTS (Jurassic Park, 1993) - it's just that it came in India later than DTS. Dolby Stereo (Spectral Recording and Dolby A) had arrived in India (in Hindi films) long before DTS.
Also, when a Dolby Digital film is played back in a hall without a DD reader, it doesn't play the front channels in digital. I don't know where you got the idea. The system reads the optical analogue Dolby SR information and plays the film in either mono, stereo or 4-channel analogue Dolby Stereo (the most common).
Dolby Stereo SR is an analogue surround system despite the name. SRD is not a standard term, just a confusing abbreviation by some theatres for 'surround'.
Edited By Aryan on 1076245132