I have experienced the capability of "22.2 Multichannel Sound" which allows you to freely control the overwhelming presence of the sound image with NHK Institute of Public Access 2016

It is open to the public from Thursday 26th (Thu) 20th to Sunday 29th (Sun) in 2016NHK Giken Open 2016It has 4 times the information volume of 4K TVFull spec 8K Super Hi-VisionTechnology, etc., but one of the things realized with this technology "22.2 Multichannel soundIn the corner demonstrating "It was quite surprising experience I was able to experience.

NHK Giken Public 2016 ~ Please feel the evolving broadcasting technology continues ~
https://www.nhk.or.jp/strl/open2016/

22.2 A place where you can experience multichannel sound is a room that was slightly beside the main area of ​​STRL Open 2016.


In this room, you can experience three dimensional acoustics that the overwhelming number of speakers of 22 + 2, which is one of the features of the full spec 8K Super Hi - Vision, will be possible. Many people have experienced surround systems that can be experienced in the immediate surroundings, such as 4ch surround and 5.1ch surround, but it can be reproduced up to the height of the top and bottom. 22.2 Multichannel sound creates what kind of sound image Will it be?


The number of tremendous speakers who seemed to laugh in spite of entering the room. Actually speakers for 2ch stereo and 5.1ch which were set for comparison are also placed, but at any rate speakers placed in a place far away from the screen, and two subwoofers for bass And there is already an overwhelming atmosphere from the appearance.


Multiple speakers on side and rear. 22.2 Multichannel sound consists of 11 speakers on the front of the listener, 4 on the left and right of the listener, 1 on the top of the listener, 6 on the back of the listener, and subwoofer for low-frequency reinforcement with L + R It is said that it is the ultimate surround system that wraps around the listener all together by arranging a total of 24 speakers called 2 pieces.


In the demonstration, listening comprehension in the order of 2ch stereo, 5.1ch surround, and 22.2 multichannel sound, using the performance by the orchestra as a material. Stereo is certainly the only front ringing, this is as expected. Even when I was surrounded by the sound at the next 5.1 ch, it was thought as "ho", but when the last 22.2 ch comes up, a high-density sound like "what was the earlier?" Is reproduced I am particularly surprised. The room used for the demo is a space like an ordinary conference room, but the orchestra feels like a trembling air in the space, the ears to the appearance of the reverberation sound disappearing When it is tilted, it is an illusion that the wall of the room is gone and standing in a wide hall. It is certainly a system that makes things say goods, but when experiencing the overwhelming realistic sensation gained by that, it was a formidable technology that I thought "this ... wanted ..." in spite of it.

22.2 The concept of multichannel sound and the technology that enables volume adjustment and replacement of dialogue (narration etc) etc Details like this.


Moving to the next room while literally drowning in the lingering finish. In this room, you can actually experience the equipment and effects that produce 22.2 multichannel 3D sound.


Demonstration using material of football relay was done here, but it is possible to experience the "dialog control" mentioned earlier. It was demonstrated how you can freely adjust such as adjusting the volume of the live announcer to make it easier to hear, conversely cutting off live sounds on the contrary, converting to sub-audio in English. Also, it might be a technique that makes the overwhelming sense of wrapping certainly like three-dimensional sound like inside a football stadium. In addition, a demo that changes the sound field by adding reverberation to the surround speaker is also done.

This device is a device for loading three dimensional reverberation to the sound source. It is a dedicated software plus reverberation sound, and in the rack under the display, FURMAN's power distributor and YAMAHA's network audio I / O rack "RMio64-D, And under it is set a dedicated three-dimensional reverberation addition controller and so on.


When adding reverberation, it is said that processing is being performed based on the reverberation characteristics measured in actual halls and the like. In that case, however, it is not possible to add reverberation longer than the original environment, but it is now possible to control the reverberation time by using a proprietary algorithm developed using the "block shift method" It is said that.


With this, it becomes possible to "upmix" to the 22.2 ch by adding reverberant sound to the original 2ch sound material. In other words, even if the original is a stereo material, it can be reborn as a material with a very realistic feeling.


In addition, "Loudness meter / super realistic meter" which can numerically display the response of the listener obtained by these systems is newly developed, and it seems that it will be incorporated into the actual production site.


The concept of the loudness meter / super-realistic meter looks like this. It may be said to be a revolutionary meter system that graphically represents human subjective reactions obtained from sound.