Panasonic CQ-DVR909U Manual De Instrucciones página 73

Dolby Digital
This is a digital audio compression technology that
was developed by Dolby Labs. This technology
breaks up a music signal into 5.1 channels for
recording and playback: left front, right front, center,
left surround, right surround and subwoofer
(0.1 channel). Because this technology makes it
possible to store a large amount of audio data on a
disc efficiently, it is used to record audio in multiple
languages, in stereo or monaural.
dts (Digital Theater System)
The amount of data is greater than with Dolby
Digital, and it enables a higher quality surround
sound to be reproduced. With this format which is a
completely discrete (separate) format, the music
signals are separated into 5.1 channels as with
Dolby Digital — left front, right front, center, left
surround, right surround, and subwoofer
(0.1 channel) — and the signals of each channel are
recorded and played back discretely.
Dolby Surround
This is a system that records a 4-channel signal (left
front, right front, center, monaural surround) in
2 channels, and then uses a Dolby Pro Logic
decoder to decode the resulting signal back into
4 signals for output. The surround channel output is
monaural.
Linear PCM Audio (LPCM)
This is a signal recording format that is used for
music CDs. Music CDs are recorded at 44.1 kHz/
16 bits, DVD video discs are recorded at
44.1 kHz/16 bits to 96 kHz/24 bits, and DVD audio
discs are recorded at 44.1 KHz/16 bits to 192 kHz/
24 bits. As a result, these formats permit playback
with even greater quality than music CDs.
Sampling Frequency, Number of Quantization Bits
When an analogue signal is converted into a digital
signal, the signal is divided into fixed time intervals
and digitized. This method is called "sampling". The
sampling frequency indicates how many intervals
1 second is divided into; the number of quantization
bits indicates the size of the data that is used to
represent each interval. The larger these figures are,
the more faithfully the analogue sound can be
reproduced.
Titles and Chapters (DVD Video), Groups and
Tracks (DVD Audio)
A DVD is divided into several large divisions (titles,
groups), and several smaller divisions (chapters,
tracks). These divisions are assigned numbers,
allowing the user to easily specify where he or she
wants to start playback.
Example) DVD video
Title 1 Title 2
Chapter 1 | Chapter 2] -+-+ [Chapter 1] -=
Example) DVD audio
Group 2
O
| Track 1 | Track2 | + | Tracki [ > ] .
Tracks (Video CD, Music CD)
Video CDs and music CDs are divided into several
divisions (tracks), each of which is numbered.
Example}
Pan & Scan Screen
This is one method for displaying wide-screen video
on a normal sized (4:3) TV; in this view, the left and
right edges of the screen are cut off.
This is one method for displaying wide-screen video
on anormal sized (4:3) TV; in this view, black bands
appear at the top and bottom of the screen.
SEA
Playback Control (Video CD)
When a video CD package is labeled as "supports
playback control", etc., the user can display a menu
screen on the TV and interactively access certain
scenes and information.
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