Glossary
• Dolby Digital
Digital audio encoding/decoding technology
developed by Dolby Laboratories, Inc. It
consists of front (Left/Right), center, surround
(Left/Right) and sub woofer channels. It is a
designated audio standard for DVD-video and
also known as 5.1 channel surrotmd. Since
surround information is recorded and
reproduced in stereo, more realistic sound with
fnller presence is delivered than with Dolby
sun'ound.
• Dolby Pro Logic II
This technology converts 2 channel stereo
recorded audio into 5.1 channel for playback.
There is a MOVIE mode for movies and
MUSIC mode for stereo soarces such as
music. Old movies encoded in the traditional
stereo t_rmat can be enhanced with 5.1
channel sun'ound sound.
• Dolby Surround (Dolby Pro
Logic)
Audio processing technology developed by
Dolby Laboratories, Inc. Center and mono
sun'ound information is matrixed into two
stereo channels. When reproduced, audio is
decoded and ompm in 4 cham_el sun'ound
sound. This is the most common audio
processing method for DVD-video.
• DTS Digital Surround
Digital audio encoding/decoding technology
for theaters developed by DTS, Inc. It
compresses audio less than Dolby Digital,
delivering a higher quality sound
reproduction.
• HDMI (High-Definition
Multimedia Interface)
HDMI is an interface that supports both video
and audio on a single digital connection. The
HDMI connection carries standard to high
definition video signals and multi-channel
audio signals to audio/video components, such
as HDMI equipped TVs, in digital form
without degradation. The HDMI specification
supports HDCP (High-bandwidth Digital
Contents Protection), a copy protection
technology that incorporates coding
technology for digital video signals.
• Sampling frequency
To convert analog audio to digital, analog data
should be quantified. This process is called
sampling, and the number of times per second
the analog data is qnantified is called the
sampling frequency. A standard music CD
stores data quantified at 44,100 times per
second, which is expressed as a sampling
frequency of 44.1 kHz. Generally speaking, a
higher sampling freqnency means better sound
quality.
• TSP (Time Stretched Pulse)
A TSP signal is a highly precise measuring
signal that utilizes impulse energy, measm'ing
a wide band, from low" to high, in a short
period.
The amount of energy used to measm'e signals
is important to ensure measurement accuracy
in a normal indoor environment. Using TSP
signals makes it possible to measure signals
effectively.
60 ;8
To Next Page
Loading...
