Yamaha DVD-S2300 - Manual (Page 39)

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English
APPENDIX
Bitstream
In this manual, “bitstream” refers to the digital form of
multiple channel audio data (e.g., 5.1 channel audio)
before it is decoded into its various channels.
CINEMA DSP
The Dolby Surround and DTS systems were originally
designed for use in movie theaters, and theaters remain the
premiere listening experience—especially movie theaters
with complex speaker and sound systems, optimized for
acoustics and special effects.
There is a great variety in the sound quality of listening
environments in homes, due to variables such as room
size, wall material, number of speakers, etc.
A result of extensive research, YAMAHA CINEMA DSP
utilizes YAMAHA original sound field technology to com-
bine three systems—Dolby Pro Logic, Dolby Digital and
DTS—to create a theater-quality visual and audio experi-
ence in your home.
Decoder
A device or program that translates (decodes) encoded
data on DVDs into an appropriate format.
Dolby Digital
A method for coding digital signals developed by Dolby
Laboratories. In addition to stereo (2-channel) audio,
Dolby Digital signals can also be 5.1-channel audio. A
large amount of audio information can be recorded on one
disc using this method.
Dolby Pro Logic
A surround system in which a 4-channel audio track is
recorded as two channels, then restored to four channels
for playback. The surround channel is monaural and can
reproduce up to 7 kHz.
Dolby Pro Logic II
Dolby Pro Logic II is an improved technique for decoding
data that was encoded by Dolby Surround software. This
new technology enables discrete 5-channel playback with
2 front channels, 1 center channel, and 2 rear channels
(instead of only 1 rear channel as with conventional Pro
Logic technology). A music mode is also available for 2-
channel sources in addition to the movie mode.
Frames
Moving pictures are composed of a sequence of still
images called frames. About 30 frames are shown each
second (30fps). Each frame is composed of two interlaced
fields. A television displays these fields in rapid succes-
sion to create frames.
Frame stills and field stills
A frame still is an image composed of two alternating
fields. Edges may be slightly blurry, but the overall image
quality is high.
A
field still is an image composed from only one of the
two fields. The picture is not blurry, but contains only half
of the visual information of a frame still.
Group
A DVD audio disc is divided into large sections called
“groups” and smaller sections called “tracks.” The num-
bers allocated to these sections are called “group num-
bers” and “track numbers.”
Interlaced and progressive output
NTSC, the video signal standard, uses 525 interlaced (i)
scan lines. Progressive scanning uses twice that number of
scan lines and is called 525p. The 525i video signals out-
put from the unit’s COMPONENT VIDEO OUT jacks (Y,
P
B
, P
R
) allow you to enjoy higher quality pictures than if
the signals were output from the video output jack or S
VIDEO OUT jack. The COMPONENT VIDEO OUT
jacks are also able to handle 525p (progressive) video sig-
nals, which are of even greater resolution.
LFE 0.1 channel
This channel reproduces low bass signals in the frequency
range of 20 Hz to 120 Hz. This channel is counted as 0.1
because it generates only a low frequency range relative to
the full-range reproduced by the other five channels in a
Dolby Digital or DTS 5.1 system.
PCM
Pulse Code Modulation (PCM) converts analog waves into
digital signals. It is commonly used in the creation of
music CDs. DVDs allow greater volume, and hence use
linear PCM, which has a higher sampling rate. Com-
pressed PCM signals are called packed PCM (PPCM).
Matrix 6.1
The unit incorporates a Matrix 6.1 decoder for Dolby Dig-
ital and DTS multi-channel software that enables 6.1-
channel reproduction by adding a rear center channel to an
existing 5.1-channel format. (The rear center channel is
created from rear left and right channels, and output from
a virtual rear center speaker.) With this additional channel,
you can experience more dynamic and realistic moving
sounds, especially in scenes with “fly-over” and “fly-
around” effects.
GLOSSARY
DVD-A
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