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5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. [1] It uses five full-bandwidth channels and one low-frequency effects channel (the "point one"). [2] Dolby Digital, Dolby Pro Logic II, DTS, SDDS, and THX are all common 5.1 systems. 5.1 is also the ...
YouTube TV is finally rolling out 5.1 Dolby surround sound audio support — which has been among users’ biggest requests — and is launching a premium “4K Plus” service tier.
The most common surround sound specification, the ITU's 5.1 standard, calls for 6 speakers: center (C), in front of the listener; left (L) and right (R), at angles of 60°; left surround (LS) and right surround (RS) at angles of 100–120°; and a subwoofer, whose position is not critical.
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.
If played on a 5.1 audio set equipped with Neural Surround decoder, the watermarks (i.e. spatial cues) in the waveforms are detected and the signal is recovered to its original 5.1 form. The technology is similar to parametric stereo , in which a mono signal is recovered to stereo.
A 1080 line variant of Test Card W (sometimes referred to unofficially [30] as Test Card X) was used on the now-defunct BBC HD channel. It could be viewed every two hours as part of the BBC HD preview slot. When viewed, it was enhanced with 5.1 surround sound tests.
All songs are featured in Dolby Digital, DTS and DVD-Audio (MLP) 5.1 surround sound mixes. The tracklist is slightly different from that given on the inlay cards ("Some People" comes before "Don't Hang Up"). The DVD has an extra track, "I Really Love Her", which was previously a hidden track on Ringo Rama.
Dolby TrueHD is a lossless, multi-channel audio codec developed by Dolby Laboratories for home video, used principally in Blu-ray Disc and compatible hardware. Dolby TrueHD, along with Dolby Digital Plus (E-AC-3) and Dolby AC-4, is one of the intended successors to the Dolby Digital (AC-3) lossy surround format.