Dolby Laboratories Atmos Operation & User’s Manual
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Dolby Laboratories Atmos, 2 Dolby Atmos ® , the revolutionary cinema sound technology, has come to home theaters. With Dolby Atmos, content creators can precisely place and move sounds anywhere in your living room, including overhead, to make entertainment incredibly immersive and lifelike. This white paper is designed to explain how Dolby Atmos will work in home theaters and how you can build a Dolby Atmos enabled system or upgrade your existing system to support Dolby Atmos. This paper also explains the technological components of Dolby Atmos in home theater and the tools that content creators and broadcasters will use to create and deliver Dolby Atmos content to homes. Why replace chan
Dolby Laboratories Atmos, We wor k entire m sound m enabled The res u Brave. S the first films in D Dolby A Dolby A t a combi n envelopi car horn specific l right, w h Using so dimensi o exactly w mix, the number Figure 1: F k ed closely w ovie theatr e m ixers, adap t mixers to c u lt of that in S ince then, a two years a D olby Atmo s A tmos an d t mos is bas e n ation of 9. 1 ng sound s c blaring—c a ocation in t h ile the yelli phisticated o nal space, w here they
4 Dolby Atmos in home theater Dolby has now developed the technology required to translate the Dolby Atmos experience in cinema to home theaters. In the case of the home theater, every sound in the mix is represented as an audio object. What happens when you play a Dolby Atmos film, whether from a Blu-ray Disc™ or a streaming video service, is quite remarkable. When you set up
5 Blu-ray Disc. Both formats now support Dolby Atmos sound, meaning that you’ll be able to play Dolby Atmos movies from your Blu-ray player or streaming device. A Blu-ray player that fully conforms to the Blu-ray specification can play a Dolby Atmos movie without a firmware update. The player will need to be connected to an AVR capable of supporting
Dolby Laboratories Atmos, Through Atmos e n feet off t produce to belie v Figure 2: D overhead s You will upward- f tradition Atmos d Figure 3: I the same c our knowl e n abled spe a t he floor. T h an incredib v e them. D olby Atmos e n s ound. be able to p f iring elem e al speaker a rivers are e ntegrated Dol b c abinet. The t w e dge of psy c a kers that c a h ese speak e ly lifelike r e n abled speake r p urchase un e nts in one c a nd one for nclosed in a b y Atmos ena b w o sets of spe a c hoacoustic s a n create o v e rs fire soun e -creation o f r s reflect
Dolby Laboratories Atmos, 7 But if you already have conventional speakers you like, you can simply buy Dolby Atmos enabled add-on speaker modules. These include only the upward-firing elements. You can place these add-on modules on top of your current speakers or on a nearby surface. Figure 4: You can place Dolby Atmos enabled add-on speaker modules on top of or near your existing traditional speakers. Dolby Atmos enabled speakers can produce an incredibly accurate Dolby Atmos experience in many types of rooms. You’ll get the best sound if your ceiling is flat (not vaulted or
Dolby Laboratories Atmos, 8 auditorium, creating a more diffuse experience. Audio experts who have heard Dolby Atmos enabled speakers agree that in certain rooms, the sound these speakers produce can be preferable to the sound that overhead speakers produce. Speaker recommendations Dolby recommends that you use four Dolby Atmos enabled speakers when possible. Use of four speakers will make the placement of overhead sounds more accurate, and you’ll get more precise, realistic sounds as an object—such as a helicopter—passes overhead in a video. Two of the speakers (whether they are integrated speakers or add-on modules) should be in the front l
Dolby Laboratories Atmos, Figure 5: I You can theater. ceiling b two Dol b trouble o whether of both. While th e system c instance “front v e other sp e Howeve r that it s u Descri b With the speaker f you use ove r also combi n This can b e ut want to a b y Atmos e n o f installing you’re usin e arrangem c an support , Dolby At m e rtical heigh e aker positi r , before de s u pports the b in g your debut of D configurati o r head speaker s n e Dolby At m e useful if, f o a dd two mo n abled spea k new speak e g overhead ents recom m many othe m os support s t” positio
Dolby Laboratories Atmos, 10 adds a number at the end to specify the number of overhead or Dolby Atmos enabled speakers you use (for example, 7.1.4). The following figures show the most common speaker layouts in a Dolby Atmos system for home theater. Figure 6: A traditional 7.1 speaker layout with four Dolby Atmos enabled speakers (7.1.4). Figure 7: A traditional 5.1 speaker layout with four Dolby Atmos enabled speakers (5.1.4). Figure 8: A traditional 5.1 speaker layout with two Dolby Atmos enabled speakers (5.1.2).
Dolby Laboratories Atmos, 11 There is one important consideration in expanding your system: new speakers must be added to your Dolby Atmos system in pairs. A new speaker on the right side of the room must be matched by a similar speaker on the left side of the room. This is true for speakers located on the floor as well as overhead. This pairing ensures a balanced soundstage. The exceptions to this rule are when you add speakers in the center or center back locations. For high-end home theaters, a 7.1.4 system (a traditional 7.1-channel-based layout with four overhead or Dolby Atmos enabled speakers) will pro
Dolby Laboratories Atmos, 12 Atmos format was designed to be backward compatible, so it will play on both new and existing hardware platforms. In the future, upgrading your equipment to products capable of supporting Dolby Atmos will unlock the ultimate experience from Dolby Atmos content. In the meantime, you will get a great surround experience from traditional channel-based home theaters. The technological building blocks of Dolby Atmos Initially, you’ll be able to play Dolby Atmos content from a Blu-ray Disc or from a streaming video service. Eventually, cable, terrestrial, and digital broadcast systems as well as video game consoles will be
Dolby Laboratories Atmos, 13 Figure 9: This diagram represents the workflow for translating cinematic Dolby Atmos content to home theaters. Dolby Atmos in Dolby TrueHD Dolby has expanded the Dolby TrueHD format, used in Blu-ray discs, to allow the format to support Dolby Atmos content. Before Dolby Atmos, Dolby TrueHD provided lossless support for channel-based audio, such as 5.1 and 7.1. We have added a fourth substream for Dolby Atmos sound. This substream represents a losslessly encoded fully object-based mix. Dolby Atmos in Dolby TrueHD is transmitted from a Blu-ray player to y
14 Both new audio decoders are designed to be fully backward compatible with legacy channel- based Dolby Digital Plus and Dolby TrueHD soundtracks Dolby Atmos in Dolby MAT In the past, the Dolby MAT encoder resided in a Blu-ray player to pack the variable bit-rate Dolby TrueHD bitstreams for transmission over the fixed bit-rate HDMI. A MAT decoder is subsequent
Dolby Laboratories Atmos, 15 Figure 10: Dolby Atmos for home theaters supports as many as 24 speakers on the floor and 10 speakers producing overhead sound. Dolby surround upmixer If you invest in building a Dolby Atmos home theater, you want to get full use of it, even if the content you’re playing isn’t mixed in Dolby Atmos. That’s where the Dolby surround upmixer comes in. If you choose to enable it, the Dolby surround upmixer expands the audio of legacy channel-based content to take advantage of your entire system, including overhead or Dolby Atmos enabled speakers. The Dolby surround upmixer employs the original sound
Dolby Laboratories Atmos, 16 To maintain the frontal spatial audio image, the upmixer will not send upmixed audio to speakers that are located between the left, center, and right speakers or to the left and right wide speakers. Additionally, the unmixed audio is not sent to the center surround speaker. Spatial imaging is complemented through the use of overhead or Dolby Atmos enabled speakers in these cases. Translating cinematic Dolby Atmos content to the home As we’ve noted, Dolby Atmos allows each sound in a movie scene to be
17 Production houses that create Dolby Atmos content for home theaters will use a tool called Dolby Media Producer, along with its suite of professional encoding, decoding, and media- related tools. Before using Dolby Media Producer, though, production houses have the option to perform several preliminary steps, including a near-field remix and remastering of the cinematic mast
Dolby Laboratories Atmos, 18 Conclusion Dolby has invested years of engineering and research work into accurately translating the Dolby Atmos experience from the cinema to home theaters. Today we can bring a Dolby Atmos experience to the home through established delivery methods while maintaining backward compatibility with legacy playback systems. The result is nothing short of the most realistic and immersive entertainment experience ever available for home theaters. Dolby, Dolby Atmos, Pro Logic, and the double-D symbol are registered trademarks of Dolby Laboratories. Dolby Digital Plus is a trademark of Dolby Laboratories. All other trademarks remain the property of thei
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