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Techno Tidbits & Problem-solving
DTS
DTS has been adopted as a sound recording format in the latest movie theaters since the release of “JURASSIC
PARK” in 1993, and has a good reputation for high quality sound and dynamic surround effects.
In this system, 6 channels of digital sound are recorded on CD-ROM, rather than on the film. DTS adopts a
simultaneous playback format. With a low rate of compression of sound signals and a high rate of transmittance,
a higher sound quality format is produced. Also, unlike the process of recording digital sounds on film directly,
the only components required are a CD-ROM player as might be used with a personal computer and a DTS
processor, and therefore less investment is required than with other formats. For this reason, the format is
being introduced in more and more movie theaters, and is being adopted in home movie software (DVD, LD)
and music software (5.1 channel CD).
More than 11,000 movie theaters around the world have adopted the DTS format, which is now the most
popular digital format for movie theaters, especially in U.S.A, Europe, and Asia.
No. of recorded
channels
No. of playback
channels
Playback channel
structure
Sound processing
Rear (Surround) high
frequency playback
limit
Other
Dolby Digital
5.1 channels (Max.)
5.1 channels (Max.)
Front Left, Front Right,
Center, Surround Left,
Surround Right, Sub
Woofer
Digital discrete
processing
20,000 Hz
• 5.1 completely
independent
channels
• High dynamic range
• Stable position, high
phase characteristics,
and advanced
surround effects
reproduction
• High efficiency
(Compression rate of
about one-tenth)
DTS
6 channels (Max.)
6 channels (Max.)
Front Left, Front Right,
Center, Surround Left,
Surround Right, Sub
Woofer
Digital discrete
processing
20,000 Hz
• 6 completely
independent
channels
• High dynamic range
• Stable position, high
phase characteristics,
and advanced
surround effects
reproduction
• Low compression
rate
(about one-fourth),
high quality sound
Dolby Pro Logic
Surround
2 channels
4 channels
Front Left, Front Right,
Center, Surround
Analog matrix
processing
7,000 Hz