Talk:Dolby

Missing: Inifinitec/Dolby3D
Missing technology, originally called "Infinitec", now branded as "Dolby3D". Unlike the others this is completely unrelated to sound, so this would definitely need a new section under technologies. Actually, I imagine it is worthy of its own page... (likely with a reference to Real_D, the competitor) 69.12.141.101 (talk) 07:25, 31 December 2007 (UTC)

Contradiction or Typo ?
"Dolby Digital Plus: audio codec based on Dolby Digital that is backward compatible"

Yet clicking on "Dolby Digital Plus" says "It is an incompatible[1] development of the technologies used in the earlier Dolby Digital system.".

Preroll (talk) 20:43, 16 June 2010 (UTC)

70mm Dolby Stereo
Dolby also improved the presentation of 70mm prints by applying (type A) and in later years (type SR).

Logan’s Run (1976) used five-screen front with mono surround with Dolby type A

Star Wars and Close Encounters the Third Kind (1977) was among two films to use subwoofer track that was dubbed as “Baby Boom”. It used two of the magnetic tracks on the 70mm and was played over the stage channels 2 and 4 that was commonly used for 5-screen fronts along with one mono surround channel.

Thou Star Wars used the inner two stage front channels, Close Encounters the Third Kind used sub bass arrays, presumable I assume they would be laid out beneath the stage channels.

(1978) saw the introduction of stereo surrounds that was dubbed split-surrounds on Superman The Movie and for the first time an even more realistic sound panning to create believable effects can be made to move around the audience.

So in sense Superman The Movie is the first film to use stereo surrounds, it was only Apocalypse Now (1979) that was publicized.

List of Dolby Stereo 70mm films at the In-70mm site, only a few dozen 70mm was ever turned out with stereo surrounds the rest was ether standard LCRS/subwoofer or five-screen/mono surround http://www.in70mm.com/library/process/dolby/index.htm

Most projectionists would grumble over 35mm Dolby Stereo that was only a optical matrix format. It was 70mm that offered discrete sound as each part of the soundtrack has its own individual magnetic stripe on the print. — Preceding unsigned comment added by JBListening (talk • contribs) 18:28, 23 December 2010 (UTC)

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Missing: Dolby AC-2
Dolby AC-3 was developed in the early 1990's, not 1986. It was also preceded by another Dolby digital standard, AC-2. AC-2 was used in the the first generation hardware of the Primestar satellite system. There was an even earlier codec which I suppose logically would be called AC-1 but was called something else (the name eludes me). AC-2 was not compatible with AC-3, although the technology was very similar. I developed ASICs at General Instrument in the early 1990s to support both AC-2 and AC-3. Jlodman (talk) 00:19, 26 April 2018 (UTC)

Add Atmos to the "Dolby Surround systems at a glance" table?
Shouldn't Dolby Atmos be added to the Dolby Surround systems at a glance table? There are lots of models of A/V receivers that tout Dolby Atmos as a feature. 98.38.201.121 (talk) 16:24, 26 March 2022 (UTC)
 * Indeed, Dolby Atmos should be added, so we did it. It sounds very nice! Steve shelok  honov  19:03, 19 June 2022 (UTC)