Dolby Pro Logic; Dolby Headphone - Denon AVC-A1SR Bedienungsanleitung

ENGLISH
w Dolby Pro Logic II
• Dolby Pro Logic II is a new multi-channel playback format developed by Dolby Laboratories using feedback
logic steering technology and offering improvements over conventional Dolby Pro Logic circuits.
• Dolby Pro Logic II can be used to decode not only sources recorded in Dolby Surround (
stereo sources into five channels (front left, front right, center, surround left and surround right) to achieve
surround sound.
• Whereas with conventional Dolby Pro Logic the surround channel playback frequency band was limited,
Dolby Pro Logic II offers a wider band range (20 Hz to 20 kHz or greater). In addition, the surround
channels were monaural (the surround left and right channels were the same) with previous Dolby Pro
Logic, but Dolby Pro Logic II they are played as stereo signals.
• Various parameters can be set according to the type of source and the contents, so it is possible to achieve
optimum decoding (see page 30).
Sources recorded in Dolby Surround
These are sources in which three or more channels of surround have been recorded as two channels of
signals using Dolby Surround encoding technology.
Dolby Surround is used for the sound tracks of movies recorded on DVDs, LDs and video cassettes to be
played on stereo VCRs, as well as for the stereo broadcast signals of FM radio, TV, satellite broadcasts
and cable TV.
Decoding these signals with Dolby Pro Logic makes it possible to achieve multi-channel surround
playback. The signals can also be played on ordinary stereo equipment, in which case they provide normal
stereo sound.
There are two types of DVD Dolby surround recording signals.
q 2-channel PCM stereo signals
w 2-channel Dolby Digital signals
2 Sources recorded in Dolby Surround are indicated with the logo mark shown below.
Dolby Surround support mark:
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are trademarks of Dolby Laboratories.
Confidential Unpublished Works. ©1992-2000 Dolby Laboratories. All rights reserved.
e Dolby Headphone
• This is a three-dimensional sound technology developed jointly by Dolby Laboratories and Lake
Technology Ltd. of Australia for achieving surround sound using regular headphones.
• Previously, when using headphones all the sounds resonated inside the head and it was uncomfortable
to listen over headphones for long periods of time. Dolby Headphone simulates speaker playback in a
room and places the sound at the front or the sides, outside the head, to achieve a powerful sound like
the sound of movie or home theaters. This technology is mainly for multichannel audio/video equipment
with Dolby Digital or Dolby Pro Logic Surround decoding functions and works with a high performance
digital signal processing (DSP) chip.
• Dolby Headphone is effective not only for multichannel sources but also for stereo programs.
• On the AVC-A1SR, it is possible to output signals encoded in the Dolby Headphone mode from the
recording output terminal and record them on a separate recorder.
(2) DTS Digital Surround
DTS Digital Surround (also called simply DTS) is a multi-channel digital signal format developed by Digital
Theater Systems.
DTS offers the same "5.1" playback channels as Dolby Digital (front left, front right and center, surround left
and surround right) as well as the stereo 2-channel mode. The signals for the different channels are fully
independent, eliminating the risk of deterioration of sound quality due to interference between signals,
crosstalk, etc.
DTS features a relatively higher bit rate as compared to Dolby Digital (1234 kbps for CDs and LDs, 1536 kbps
for DVDs) so it operates with a relatively low compression rate. Because of this the amount of data is great,
and when DTS playback is used in movie theaters, a separate CD-ROM synchronized with the film is played.
With LDs and DVDs, there is of course no need for an extra disc; the pictures and sound can be recorded
simultaneously on the same disc, so the discs can be handled in the same way as discs with other formats.
There are also music CDs recorded in DTS. These CDs include 5.1-channel surround signals (compared to
two channels on current CDs). They do not include picture data, but they offer surround playback on CD
players that are equipped with digital outputs (PCM type digital output required).
DTS surround track playback offers the same intricate, grand sound as in a movie theater, right in your own
listening room.
38
2 DTS compatible media and playback methods
Marks indicating DTS compatibility:
) but also regular
The following are general examples. Also refer to the player's operating instructions.
Media
Optical or coaxial digital output
CD
Optical or coaxial digital output
LD (VDP)
Optical or coaxial digital output
DVD
1 DTS signals are recorded in the same way on CDs and LDs as PCM signals. Because of this, the un-
decoded DTS signals are output as random "hissy" noise from the CD or LD player's analog outputs. If
this noise is played with the amplifier set at a very high volume, it may possibly cause damage to the
speakers. To avoid this, be sure to switch the input mode to "AUTO" or "DTS" before playing CDs or LDs
recorded in DTS. Also, never switch the input mode to "ANALOG" or "PCM" during playback. The same
holds true when playing CDs or LDs on a DVD player or LD/DVD compatible player. For DVDs, the DTS
signals are recorded in a special way so this problem does not occur.
2 The signals provided at the digital outputs of a CD or LD player may undergo some sort of internal signal
processing (output level adjustment, sampling frequency conversion, etc.). In this case the DTS-encoded
signals may be processed erroneously, in which case they cannot be decoded by the AVC-A1SR, or may
only produce noise. Before playing DTS signals for the first time, turn down the master volume to a low
level, start playing the DTS disc, then check whether the DTS indicator on the AVC-A1SR (see page 27)
lights before turning up the master volume.
3 A DVD player with DTS-compatible digital output is required to play DTS DVDs. A DTS Digital Output logo
is featured on the front panel of compatible DVD players. Recent DENON DVD player models feature DTS-
compatible digital output – consult the player's owner's manual for information on configuring the digital
output for DTS playback of DTS-encoded DVDs.
Manufactured under license from Digital Theater Systems, Inc. US Pat. No. 5,451,942, 5,956,674, 5,974,380,
5,978,762 and other world-wide patents issued and pending. "DTS","DTS-ES Extended Surround" and "Neo:6"
are trademarks of Digital Theater Systems, Inc. Copyright 1996, 2000 Digital Theater Systems, Inc. All Rights
Reserved.
(3) DTS-ES Extended Surround
DTS-ES Extended Surround is a new multi-channel digital signal format developed by Digital Theater
Systems Inc. While offering high compatibility with the conventional DTS Digital Surround format, DTS-ES
Extended Surround greatly improves the 360-degree surround impression and space expression thanks to
further expanded surround signals. This format has been used professionally in movie theaters since 1999.
In addition to the 5.1 surround channels (FL, FR, C, SL, SR and LFE), DTS-ES Extended Surround also offers
the SB (Surround Back, sometimes also referred to as "surround center") channel for surround playback with
a total of 6.1 channels. DTS-ES Extended Surround includes two signal formats with different surround
signal recording methods, as described below.
TM
2 DTS-ES Discrete 6.1
DTS-ES Discrete 6.1 is the newest recording format. With it, all 6.1 channels (including the SB channel) are
recorded independently using a digital discrete system. The main feature of this format is that because the
SL, SR and SB channels are fully independent, the sound can be designed with total freedom and it is
possible to achieve a sense that the acoustic images are moving about freely among the background sounds
surrounding the listener from 360 degrees.
Though maximum performance is achieved when sound tracks recorded with this system are played using
a DTS-ES decoder, when played with a conventional DTS decoder the SB channel signals are automatically
down-mixed to the SL and SR channels, so none of the signal components are lost.
TM
2 DTS-ES Matrix 6.1
With this format, the additional SB channel signals undergo matrix encoding and are input to the SL and SR
channels beforehand. Upon playback they are decoded to the SL, SR and SB channels. The performance
of the encoder used at the time of recording can be fully matched using a high precision digital matrix
and .
Dolby Digital output jacks Playback method (reference page)
Set the input mode to "AUTO" or "DTS" (page 20). Never set
(same as for PCM) 2 the mode to "ANALOG" or "PCM".
Set the input mode to "AUTO" or "DTS" (page 20). Never set
(same as for PCM) 2 the mode to "ANALOG" or "PCM".
Set the input mode to "AUTO" or "DTS" (page 20).
(same as for PCM) 3
TM
1
1