Sony HT-DDW900 User Manual

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Glossary
Component video
A format for transmitting video signal 
information consisting of three separate 
signals: luminance Y, chrominance Pb, and 
chrominance Pr. High quality pictures, such as 
DVD video or HDTV pictures, are transmitted 
more faithfully. The three jacks are color - 
coded green, blue and red.
Composite video
A standard format for transmitting video 
signal information. The luminance signal Y 
and chrominance signal C are combined and 
transmitted together.
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 5.1ch surround. Since surround 
information is recorded and reproduced in 
stereo, more realistic sound with fuller 
presence is delivered than with Dolby 
surround.
Dolby Pro Logic II
This technology converts 2ch stereo recorded 
audio into 5.1ch for playback. There is a 
MOVIE mode for movies and MUSIC mode 
for stereo sources such as music. Old movies 
encoded in the traditional stereo format can be 
enhanced with 5.1ch surround sound.
Dolby Surround (Dolby Pro 
Logic)
Audio processing technology developed by 
Dolby Laboratories, Inc. Center and mono 
surround information is matrixed into two 
stereo channels. When reproduced, audio is 
decoded and output in 4ch surround sound. 
This is the most common audio processing 
method for DVD-video.
DTS Digital Surround
Digital audio encoding/decoding technology 
for theaters developed by Digital Theater 
Systems, Inc. It compresses audio less than 
Dolby Digital, delivering a higher quality 
sound reproduction.
HDMI (High-Definition 
Multimedia Interface)
Technology developed by modifying the 
display connecting technology, DVI (Digital 
Visual Interface), for AV equipment. This 
interface can transmit video, audio, and 
control signals in digital format.
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 quantified 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 frequency means better sound 
quality.
Additional Information
US01COV_HT-DDW900-U.book  Page 65  Thursday, December 15, 2005  4:08 PM