3D TV has just arrived, but BBC engineers are already working on the next step - 3D broadcasting.
Researchers at the BBC R&D department have been developing acoustics that will allow listeners to come to the scene (such as concerts) – sounds come from every direction, even up and down.
This technology can bring new vitality to the BBC's sound department, enabling its experts to “cheat†the audience to hear the sound of objects rising or falling. Engineers claim that the new technology should enable consumers to listen to 3D sound from their existing radio and TV speakers.
Frank Melchior, audio chief technologist at BBC R&D, said: "We want to give our audience a new experience of being more immersed and involved in content. We must also ensure that we are flexible enough to distribute this content. It must be OK to listen on headphones and speakers."
This is not the first time the BBC has claimed to have made this breakthrough. Last year, Radio 4's "Today" program demonstrated 3D radio on April Fool's Day, asking the audience to hold their hands in front of their faces to get this effect.
This joke proves to be true. A paper from the BBC R&D department stated that the hope for 3D audio is to hear the sound from above and below, in addition to the left and right front and back sounds of the existing stereo or surround sound audio on the radio and television.
Engineers tested the new technology with a "Happy Concert", a concert by rock band Elbow and a radio series "The Wizard of Oz".
The paper co-author Anthony Churnside said there are many ways to generate 3D sound. Psychoacoustic illusions can make you feel the sound from the top and bottom.
"For the Wizard of Oz, we focus on a number of scenes, including the tornado that rolls away the house. Suddenly there are a few cows that are screaming in the air, and the wind may be blowing around you. With 3D sound, you are in every direction. Can be manipulated, so you can have a lot of creativity."
“For concerts or live events, most of the sound comes from the stage in front of you, but the immersion comes from the sound of the roof and walls.â€
BBC engineers have been testing different technologies, including audio ambient stereo recording of microphones in different locations.
Each track is broadcast simultaneously, and as the computing power of high fidelity devices and televisions evolves, the signals can be decoded and configured to accommodate the speaker placement of each listener.
Churnside said: "The final solution will probably be a hybrid technology, so we can record, produce, broadcast and listen to audio in the most flexible way."
3D audio may eventually help to enhance 3D TV broadcasting, and it is expected to add 3D audio after Sky TV 3D broadcasts the first episode of David Attenborough's "Plant Kingdom" at the end of June.
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