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2. 5.1 surround sound - Wikipedia

   en.wikipedia.org/wiki/5.1_surround_sound

   The provision of 5.1 digital sound on 35 mm significantly reduced the use of the very expensive 70 mm format. 5.1 digital surround, in the forms of Dolby Digital AC-3 and DTS, started appearing on several mid-1990s LaserDisc releases, among the earliest being Clear and Present Danger and Jurassic Park (the latter having both AC3 and DTS ...

3. Dolby Digital - Wikipedia

   en.wikipedia.org/wiki/Dolby_Digital

   Dolby AC-3 (a backronym for Audio Codec 3, Advanced Codec 3, or Acoustic Coder 3), also known as ATSC A/52 (name of the standard) [18] or simply Dolby Digital (DD), is the common version containing up to six discrete channels of sound.

4. Surround sound - Wikipedia

   en.wikipedia.org/wiki/Surround_sound

   Cinema 5.1 surround formats include Dolby Digital and DTS. Sony Dynamic Digital Sound (SDDS) is an 8 channel cinema configuration which features 5 independent audio channels across the front with two independent surround channels, and a Low-frequency effects channel.

5. Dolby - Wikipedia

   en.wikipedia.org/wiki/Dolby

   Dolby Digital Plus (also known as E-AC-3) is a lossy audio codec based on Dolby Digital that is backward compatible, but more advanced. The DVD Forum has selected Dolby Digital Plus as a standard audio format for HD DVD video. It supports data rates up to 6 Mbit/s, an increase from Dolby Digital's 640 kbit/s maximum. On Blu-ray, Dolby Digital ...

6. Dolby Digital Plus - Wikipedia

   en.wikipedia.org/wiki/Dolby_Digital_Plus

   Dolby Digital Plus, also known as Enhanced AC-3 (and commonly abbreviated as DDP, DD+, E-AC-3 or EC-3), is a digital audio compression scheme developed by Dolby Labs for the transport and storage of multi-channel digital audio. It is a successor to Dolby Digital (AC-3), and has a number of improvements over that codec, including support for a ...

7. Surround channels - Wikipedia

   en.wikipedia.org/wiki/Surround_channels

   Some matrix encoding surround sound systems use a single back center channel surround (Dolby Digital EX, Dolby Pro Logic IIx 6.1) or a back left and back right (Dolby Pro Logic IIx 7.1) speaker configuration. Often the standard surround channels are misconceived to be "rear channels" when they are in fact meant to be placed at 90-120 degrees.