[Home Theater Network HDAV.com.cn] As early as 10 years ago, Wilfried Van Baelen, the leader of Galaxy Studios, officially announced the concept of Auro-3D, and in 2006, in Paris and San Francisco's Audio Engineering Society. (AES) The Audio Engineers Association presented and explored this new surround sound technology, and by 2010, Wilfried Van Baelen and Alfred Schefenacker co-founded Auro Technologies to continue to develop Auro-3D. It can be seen that Auro-3D is far ahead of Dolby Atmos in technology development. So far, Auro-3D 3D sound has been applied to over 100 movies and more than 500 cinemas worldwide. There are already many Auro-3D cinemas in the country, although the number is not too much.
Not just for cinemas or home theaters, it is infiltrating into the entire consumer electronics arena.
At the application level, Auro-3D is much broader than Dolby Atmos, which focuses exclusively on digital cinema and home theater, and is used in other consumer electronics sectors, including video games, car audio and portable mobile audio devices. For example, in the development of video game surround sound, Auro Technologies has partnered with the famous game sound developer AudioKinetic to introduce Auro-3D into AudioKinetic's industry-leading Wwise series of software, enabling game developers to create immersive and realistic games. Sound experience. In terms of portable mobile audio devices, Auro Technologies has launched the exclusive Auro-Beautifyer audio enhancement APP app, which can be used in a range of Apple products, including iPhone, iPad and iPod Touch, which can greatly enhance MP3. The depth and resolution of the sound presented with the AAC audio file.
In addition, in terms of car audio, it is an important direction for the development of Auro-3D. In many large-scale exhibitions at home and abroad, we have seen the example of Auro-3D technology applied to luxury cars. After all, for ultra-small spaces like cars, Achieving a realistic sound field must rely on advanced sound optimization and equalization adjustment techniques.
Mainly based on the original 5.1 or 7.1 system to add the upper channel to present immersive sound
Back in the Auro-3D 3D sound in the home surround sound system, the Auro-3D is a channel-based surround sound system, which is extended by adding one or two layers above the original 5.1 or 7.2 speaker system. The layered surround sound system forms the system of Auro 9.1, Auro 10.1, Auro 11.1 and Auro 13.1. According to Auro Technologies' official website (), Auro 9.1 and Auro 10.1 are mainly for home theater. (small rooms), Auro 11.1 and Auro 13.1 are for cinemas (large rooms).
This extension is ideal for home users who have built a 5.1 or 7.1 surround sound system at home, but it's important to note that if the surround and surround speakers in the existing system are placed far above the height of the ear, you will need Reset these speakers to the height of the human ear, otherwise it will conflict with the upper surround channel. Why is the Auro-3D using a three-layer surround sound layout? The most fundamental reason is to improve the original flattened 5.1 and 7.1 surround sound system for insufficient sound detail above the head. Before the Auro-3D and Dolby Atmos did not appear, all Blu-ray movie surround sound tracks were recorded using flat 5.1 or 7.1 channels, if the surround sound field placement method according to the conventional ITU International Telecommunication Union standard, Inevitably, the problem of insufficient details of the sound field above is caused. As a result, THX has proposed to set the surround channel to a higher position to complement this lack, while Dolby and DTS have introduced surround sound processing technologies such as Dolby Prologicllz and DTS Neo:X. Add the top channel above the track to increase the sound detail in front of the screen. This has caused many of the surround sound systems in the home of many audio-visual enthusiasts not to be based on the height of the human ear. If you want to set up the Auro-3D or Dolby Atmos system, you need to adjust accordingly.
Three-layer surround sound layout effectively covers the entire sound space
Which kind of surround sound is better than Dolby Atmos and Auro-3D? This is a very hot topic in recent days, and it has become a hot topic for many players who plan to build a new generation of immersive surround sound systems. As mentioned earlier, Dolby Atmos differs a lot from Auro-3D in that the former pays more attention to the realism of the sound in the entire stereo field, while the latter pays more attention to the surround sound of the sound field. The main reason is that Dolby Atmos is based on sound objects, while Auro-3D is based on traditional channels. Therefore, the number of speakers is sensitive to the Dolby Atmos system, and the more speakers in the entire room, the more sound details and changes, but for the Auro-3D, the first layer The sound field above is only to create a better sense of surround sound by reflecting sound, and not too much attention to the number of speakers, and adding speakers only increases the coverage of the sound field, and does not increase the sound details of the sound field above. In addition, the second layer is simply to express the effect of some of the top positions, only one speaker is needed in the family. It can be seen that if we only build the Dolby Atmos system of 7.1.4 or the Auro-3D system of 13.1 at home, in theory, the Auo-3D system has an advantage in terms of spatial envelopment, and the sense of detail is not Inferior, but if the 13.1 Auro-3D system is compared to the 24.1.10 Dolby Atmos system, the latter will clearly dominate. Therefore, the choice of which surround sound box system to build depends on the number of speakers in the system you choose.
The following is a detailed analysis of the way and characteristics of the Auro-3D three-layer surround sound field layout.
Lower surround sound field layout (first layer): This layer has two layout modes, which are in accordance with the sound field layout of 5.1 or 7.1 developed by ITU-R International Telecommunication Union, which is the basic adopted by most audio and video enthusiasts. Surround sound box system, mainly covering all the sound details in the horizontal direction, including the vocal dialogue details in the movie sound effects. All speakers in this layer need to be placed at the ear height, including surround and surround speakers.
The sound field layout above the middle layer (the second floor): This layer is the key to the entire Auro-3D system, mainly to present the ambient reflection sound of 30-40° above the water level to enhance the position of the entire sound source and enhance the sound field above. Sense of envelopment. This is the sound that is difficult to be presented by the traditional 5.1 and 7.1 ground systems. It plays an important role in recognizing the composition of the sound field. It not only allows the listener to hear more details of the ambient sound, but also grasps the height information of the sound. Present a more realistic sound.
Sound field layout above the upper level (third layer): This layer is called the Voice of God throughout the Auro-3D system and can be composed of one or an array of speakers. Note that Auro- The 3D standard does not force users to build this layer. Even the current Blu-ray music or movie clips are just the 9.1 Auro-3D system, which is just a two-layer sound field system. But don't underestimate this layer of sound field. It is important to grasp the transition of the details of the sound field above. When the sound of a plane flying from above is presented, the sound field above the upper layer can play the role of bridge transition. The voice is transmitted from one side to the other.
The Auro-3D surround sound system is mainly extended on the basis of the 5.1 system. The construction of the whole speaker system is not complicated, and the user is not required to install the speaker on the ceiling, which greatly reduces the difficulty of upgrading the existing system.
Auro 9.1 system speaker layout: This is the Auro-3D's most basic speaker system configuration, just like the 5.1.2 configuration in Dolby Atmos, mainly for small and medium-sized home theater audio-visual rooms. The construction method is also not complicated. Just put the four full-range speakers on the left and right main speakers and the left and right surround speakers at the height of 30-40° in the human ear listening position.
Auro 10.1 system speaker layout: Compared to the Auro 9.1 system, a third layer of sound field above the sound field is added to enhance the surround sound and detail transition of the upper sound field.
Auro 11.1 system speaker layout: Although this is the Auro-3D's speaker layout for professional theaters, most of the Auro-3D theaters in China use such speaker systems, but there are already many support for Auro 11.1 systems. The surround sound processor is located in the home theater, and the Auro 9.1 source can be upmixed by these processors to implement the Auro 11.1 system. Auro 11.1 is based on the Auro 10.1 system, adding an upper center speaker to the top of the center speaker.
Auro 13.1 system speaker layout: This system is not much different from the Auro 11.1 two layers above the sound field, only the lower layer surround sound field uses a 7.1 speaker system.
The above is the key interpretation of Auro-3D in the hardware part, mainly through the analysis of the speaker system, and the surround sound processor and AV amplifier part that determines the core processing power of the whole system will be interpreted in the following software part, because this part The relationship with the signal source is closer, and the combination of the two aspects will be more appropriate. Overall, the Auro-3D's speaker system is not complicated, and Auro 9.1 and Auro 10.1 are more suitable for use in the home. If the indoor space is large enough, it is not a bad idea to build a 11.1 or 13.1 channel Auro-3D system, but you need a powerful processor or amplifier.
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