Panasonic cq-dvr909n Manuel D’Utilisation

78

79

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 Digitaljleft front, right front, center, left
surround, right surround and subwoofer 
(0.1 channel)jand 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

Example) DVD Audio

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.

Letterbox Screen
This is one method for displaying wide-screen video
on a normal sized (4:3) TV; in this view, black bands
appear at the top and bottom of the screen.

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.

Power supply voltage

: 12 V DC (11Vj16V), 

- ground
(test voltage: 14.4 V)

Current consumption

: Less than 8.5 A (during

disc operations at rated
output)

Rated output

: 18 Wa4 ch_2 W

(1 kHz, 1 %, 4 ≠)

Maximum output

: 45 Wa4 ch_5 W

Suitable speaker impedance: 4 ≠
Audio input impedance : 10 k≠
Audio input sensitivity

: 200 mV

Pre-out output voltage

: 5 Vrms

Pre-out output impedance : 60 ≠
External dimensions
(WaHaD)

• Main unit

: 178a50a155 mm

• Power amplifier unit : 84a37a83 mm

Weight 

• Main unit

: 2 

kg

• Power amplifier unit : 0.35 kg

FM tuner section 
Frequency range

: 87.5 MHzj108 MHz

Usable sensitivity

: 6 dB/¨V (S/N 30 dB)

Stereo separation

: 35 dB (at 1 kHz)

MW Radio
Frequency range

: 531 kHzj1,602 kHz

Usable sensitivity

: 28 dB/¨V (S/N 20 dB)

LW Radio
Frequency range

: 153 kHzj279 kHz

Usable sensitivity

: 32 dB/¨V (S/N 20 dB)

Frequency response
(When LARGE is selected) : 2 Hzj88 kHz (192 kHz

sampling frequency DVD
audio only)
2 Hzj44 kHz (96 kHz
sampling frequency DVD
audio/video only)
2 Hzj22 kHz (48 kHz
sampling frequency DVD
audio/video only)
2 Hzj20 kHz (CD)

Delay time
Dolby Digital

• Center

: 0 msj4 ms

• Surround L/R

: 0 msj15 ms

Dolby Pro Logic

• Surround L/R

: 0 msj15 ms

Distortion
Front L/R (1 kHz, 0 dB, 
PCM input)

: 0.02 %

Dynamic range

: at least 100 dB*

S/N ratio

: at least 100 dB*

(*DVD audio)

Pickup-wave length

: 650 nm

Laser power

: Class 

II

Signal format

: PAL (standard signal

format in Europe)

Video output

: 75 ≠, 1 Vp-p

The specifications and appearance of this unit are subject to change without notice.

≥

Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are
trademarks of Dolby Laboratories. Confidential unpublished works. 

C 1992-1997 Dolby Laboratories, Inc.

All rights reserved.

≥

Manufactured under license from Digital Theater System, Inc. US Pat. No. 5,451,942 and other world-wide
patents issued and pending. “dts”, “dts Digital Surround”, are trademarks of Digital Theater Systems, Inc.
Copyright 1996 Digital Theater Systems, Inc. All rights reserved.

≥

“NAVI” is a registered trademark.

Chapter 1 Chapter 2

……

Chapter 1 ……

Title 1

Title 2

Track 1

Track 2

……

Track 1

……

Group 1

Group 2

Track 4

Track 1

Track 2

Track 3