APPENDIX
➤
Basic Knowledge of Surround Sound
En
103
What is Object Based Audio?
With traditional audio technologies, which channels (speakers)
should output what types of sounds when creating audio sources
was pre-defined. This is called “channel-based audio”. In contrast,
new audio systems such as Dolby Atmos use a new technology
called object-based audio. This technology processes each sound
(e.g., the sound of a car or an actor’s voice) contained in an audio
source as an “object” and memorizes each object's sound changes
and positional changes in a sound field to control these changes
during playback. The greatest advantage of applying object-based
audio to a home surround sound system is the power to control the
audio output method based on device features and the number of
speakers used for playback. The unit adjusts sound beam output
according to the listening room setup. It calculates the movements of
an object according to each playback environment and reproduces
sound fields that best match the intentions of a sound director. It also
enables audio output in the vertical direction so that each sound
(object) in an audio source can freely move within a sound field.
Yamaha’s Audio Technologies
This unit features many more functions based on Yamaha’s superior
audio technologies.
This technology enhances and extends bass and treble, which tend
to be weak in digitally compressed formats such as MP3 used with
portable digital audio players and computers. This makes
compressed audio sound more musically dynamic.
This technology enables precise digital recreation of actual acoustic
environments found in well-known concert halls and movie theaters.
This is achieved using Yamaha’s exclusive sound field programs,
which are based on data measured in various sound fields, and with
which the amplitude, depth, and volume of sounds have been
adjusted.
CINEMA DSP 3D uses three-dimensional sound field data, including
vertical directional information, and further extends standard
CINEMA DSP, to make sound field effects more realistic and
three-dimensional.
Compressed Music Enhancer
CINEMA DSP/CINEMA DSP 3D
