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SURROUND SOUND contributed by Navaneeth K K

Surround sound encompases a range of
techniques for enriching the sound
reproduction quality
of an audio source with
audio channels reproduced
via additional, discrete speakers.
Surround sound application encircles the
Surround sound technology is used in cinema
and home theater systems etc
Encoding Surround Sound
Discrete Surround
¢ Sound encoding where the additional
channels, beyond the standard left and right
for stereo audio, are encoded in separate
streams rather than being matrixed from a
stereo signal.
¢ The most common discrete surround formats
are the various versions of Dolby Digital and
High Bitrate

Encoding Surround Sound
The multi-channel sound is matrix-encoded
into a two-channel stereo downmix signal by
using fixed calculation rules.
Common in Home theatre systems
Leads to an imprecise spatial sound image and
therefore a limited audio quality

MPEG Surround is the latest technology to
code multichannel audio
It uses Spatial Audio coding
Its backwards Compatible with existing

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