When our editors thoroughly read Dolby Atmos's white papers and various domestic and foreign media materials, we thought it was necessary to introduce the equipment and placement of Dolby Panorama before listening to an ordinary consumer and user. Understand the knowledge, come and sort it out carefully.
It's not a simple 7.1-channel upgrade. From the 5.1 era of Dolby Digital to the Dolby TrueHD 7.1 era, we can think of Dolby's work by assigning various sounds to these speakers in 5.1 or 7.1 channels. Go and then increase the amount of data to improve the fidelity of the sound. If you still think that Dolby Atmosphere is working in this way, it is a big mistake. The increase in the number of home theater channels is affirmative. This is a trend, but in the traditional way, the problem of excessive data volume and unsuitable storage will be faced sooner or later.
What is the difference between Dolby Atmos and the traditional home theater system based on the channel?
Dolby Atmos is the first home theater system based on audio objects rather than channels. What is a sound object? Any sound you hear in a movie scene is a sound object, such as the child's shouts, the helicopter's takeoff, and the car's whistle. Using film Dolby panoramic sound, filmmakers can accurately determine the sounding position of these sounds and accurately control the displacement of the sound as the plot progresses. Home Theater Network welcomes you!
Conceiving sound in this way does not have the limitations of a channel-based audio system. In channel-based systems, filmmakers need to consider speaker settings: Should this sound come from left surround or left surround? With Dolby Atmos, the filmmaker only needs to consider the storyline: Where does the child yell and scream? Whether in a movie theater or a home theater, the Dolby Atmos sound system can intelligently determine which speakers to use to accurately reproduce the direction of movement of the child that the filmmaker wants to present.
Moreover, Dolby Atmos is more flexible and adaptable than a channel-based home theater. Playing channel-based content in a channel-based system, the number of speakers is fixed: 7.1 systems typically contain 7 speakers and 1 woofer. With Dolby Atmos, the opposite is true, and you have an unparalleled flexibility: 8 speakers (5.1.2) for a perfect experience, or more speakers for a fuller, more detailed listener the sound of. When adding speakers, the receiver that supports Dolby Atmos automatically determines how to use the speakers to create a wonderful, immersive sound.
Why is the panoramic video like a web game?
Dolby panoramic sound composition
The sound is three-dimensional. To restore the natural sound perfectly, it is obviously not enough to rely on a speaker that is divided into five groups or seven groups of sound effects. In order for the sound to be perfectly positioned both horizontally and vertically, it depends on different solutions. Dolby proposed the most natural sound (Dolby Atmos) consisting of Bed Audio, audio object and (Metadata) panoramic source data. If this is still a bit of an image, then I will use a metaphor that everyone can understand! Panoramic sound technology is very much like a large online game! And Bed Audio is equivalent to a large map in online games. The audio object is equivalent to the character that swims inside. Metadata is equivalent to the coordinates of the character that triggers the event in the map.
Bed: Movie sound effects can't all be objects, so it's like there are only actors on the stage, no background, so Atmos provides the so-called Bed sound, which is the basis of all the sounds of the whole movie, you can understand that this is the most traditional 5.1 or 7.1 channels.
Object: A set of sound effects that exist in a three-dimensional space. For example, in the Dolby panoramic sound demonstration disc, the leaf that rotates the leaf is a standard object, which is Object.
Metadata: It is the information about the position coordinates, audio size, and movement time of the object. You can imagine the sound of a bomb explosion in the train and the top of the head. In addition to their different positions, the size of the sound image and the time state of the presentation will be different.
Audio-object
After defining the audio object to be added, Atmos will automatically assign this information to each channel. The basis of traditional multi-channel coding is to consider several channels and then put the sound into it. And Dolby Atmos only used the stage of the sound of the test, what happened, and what happened. As for how many channels to use, what sounds are being made in the speakers, the power producers don't have to think about it. Because Atmos's system automatically calculates and uses these speakers to display the complete panoramic sound effect according to the playing conditions of the scene, regardless of the number and position of the speakers, it will be flexibly utilized. This is the Atmos logic based on sound objects. Therefore, the Atmos system must have sound from above, which is to give the stereo coordinate position of the sound. As for whether the speaker in this aspect is mounted on the ceiling or the sound from the floor is hitting the sky, it doesn't matter.
What is the difference between the 5.1 channel Atmos system and the traditional 5.1 channel?
The principle of Dolby Atmos is described above, so let's use an example to give you a deep understanding of 5.1. The Atmos system is different from the traditional 5.1 channel cinema. I use the cinema to give an example, because the wall of the electric power yard is a row of speakers, which is easier to explain clearly. In the case of the traditional 5.1 technology, the speaker array in the right rear half of the seat can only emit one channel of sound, which is right surround. If it is Atmos technology, a certain sound object (Object) sound can start from the right-hand speaker, one speaker slowly walks to the back of the seat, creating a clear movement of the audio, rather than the single sound of the whole face, this is There is a significant difference between Channel-based and sound objects as the underlying Object-based.
That is to say, whether it is 5.1.2 or 24.1.10, the audio tracks of Atoms can be exactly the same, and it is no longer necessary to record two tracks like the previous 5.1 and 7.1.
And this is where many people will be confused, because when Atmos is placed in the family theater, there is only one or two speakers at the right rear of the seat, so it will be concluded that Atmos is just the conclusion of the upper channel, the fact The essence is different. Maybe you think that the Atmos of the home version is not as good as the cinema? It can't be said that the 5.1 system is based on the convenience of the consumer to set up the system. In fact, due to the advanced nature of Atmos coding, the channel upgrade of the home theater function has never been easier. As long as the amplifier manufacturers believe that there is a market, there will be dozens of channels of panoramic sound home theater systems next year.
Do you have to care about Dolby Atmos's 8 questions?
Q: If Dolby Atmos allowed me to add more speakers, why do I see an AV amplifier with only 11 channels?
A: Many hardware partners are building or planning to build Dolby Atmos AV amplifiers and speakers. These partners will decide which product configurations are most appropriate for their customers. But the Dolby Atmos system is almost unlimited. If you have enough space and budget, you can create a Dolby Atmos system with 24 speakers on the floor and 10 speakers on the top. Some vendors are planning to release amplifiers with 32 channels.
Q: Do I have to install speakers on the ceiling to experience Dolby Panorama?
A: In real life, the sound comes from all directions, including the top of the head. Being able to reshape the top sound is one of the keys to creating Dolby panoramic sound. The most straightforward way to create a top-over sound is to install the speakers on the ceiling. But this is not the only way to get the best top sound.
Using knowledge of psychoacoustics and physical acoustics, Dolby and related speaker manufacturers have introduced products that use Dobly Enabled technology to create a top sound even a few feet from the ground. These speakers sound up and then reflect back from the ceiling to create and reproduce an extremely natural and realistic top sound that you can only believe when you hear it!
You'll be able to purchase an integrated speaker that supports Dolby Atmos, which includes both a traditional forward-sounding speaker and an up-sounding speaker in a single speaker cabinet (there are two sets of speakers for this type of speaker, one for traditional speakers, one for The group is for the upward sounding speaker). However, if you already have a favorite traditional speaker, just buy a speaker module that supports Dolby Atmos. This type of module only contains speakers that sound up, and you can place the module on other platforms above or beside the existing speakers.
Q: Can I use a speaker that supports Dolby Atmos in my room?
A: Speakers that support Dolby Atmos can create a truly unparalleled Dolby Atmos experience in many types of rooms. If your ceiling is flat (not arched or angular) and uses a material that reflects sound (such as standard drywall, plaster, concrete or wood), you can enjoy the best sound. Although Dolby was originally designed for rooms with indoor heights ranging from 2.4 meters to 2.7 meters (8 to 9 feet), experiments have shown that even if the room ceiling is 4.3 meters (14 feet), you can still hear the shocking Dolby panoramic sound effects. However, in a room with a high ceiling, the sound effect will become more divergent. Finally, concealed lighting fixtures, chandeliers, ceilings, and heating or air conditioning vents on the ceiling do not significantly interfere with the Dolby Atmos experience.
Triad InRoom Bronze LR-H is also a product that supports Atmos on the ground.
Q: How many top speakers do I need?
A: To create the best Dolby panoramic sound experience, we recommend using four top speakers in most rooms. But the two top speakers are enough to create extraordinary sound.
Q: If it is not a channel-based system, why is there a predefined speaker position?
A: This is because Dolby Atmos has just entered the home theater. Dolby has defined several "reference" speaker configurations to ensure that early customers can enjoy an extraordinary experience while choosing to retain most of their existing equipment. One such reference setting is the 5.1.2 configuration, which adds two top speakers or speakers that support Dolby Atmos based on a traditional 5.1 system; the 7.1.4 configuration is based on the traditional 7.1 system, adding four Top speakers or speakers that support Dolby Atmos.
5.1.2up
However, we believe this is just the beginning. Because the object-based audio system of Dolby Atmos is very adaptable, you can use many other speaker configurations. No matter which system you build, the Dolby Atmos sound format and system will adjust itself to create the best possible listening experience.
Q: How do I get a Dolby Atmos movie?
A: Whether it is Dolby TrueHD or (Dolby Digital Plus), Dolby Atmos sound is already supported. This means that the current movie carrier can be used. In fact, Dolby has stated that as long as it is at the time of the release, Dolby Atmos sound movies with Dolby Atmos tracks on their Blu-ray discs.
"Transformers 4" Blu-ray menu, everyone pay attention to see the first is the panoramic color track.jpg / /
Q: Do I need to replace the Blu-ray player or HDMI cable?
A: Any Blu-ray player that is fully compliant with the Blu-ray specification can play Dolby Atmos movies.
No need to update the firmware, just remember to set your player to the audio bitstream output mode. At the same time, you don't need to buy a new HDMI cable. Dolby panoramic audio is fully supported by the current HDMI specification.
Q: If I use the Dolby Atmos system to play a Blu-ray disc without a panoramic sound track, what would happen?
A: Regardless of whether the original audio track is 2.0, 5.1 or 7.1, as long as the amplifier is turned into Dolby Surround mode, the amplifier will automatically adjust the channel-based signal to fully utilize all the functions of the new system including the top speaker to ensure that you hear it. Lifelike, immersive voice. Simply put, even if you put any sound, Dolby Surround will make the top speaker ring.
Dolby Surround needs to be further understood during the actual operation of the t-way, because the amount of information in the center speaker will be much less when converted to Dolby Surround.
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