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Denon AVR-550SD Handleiding

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Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories.
(2) Dolby Pro Logic IIx
• Dolby Pro Logic II x furthers the matrix decoding technology of Dolby Pro Logic II to decode audio signals
recorded on two channels into up to 7.1 playback channels, including the surround back channel. Dolby Pro
Logic IIx also allows 5.1-channel sources to be played in up to 7.1 channels.
The mode can be selected according to the source. The Music mode is best suited for playing music, the
Cinema mode for playing movies, and the Game mode for playing games. The Game mode can only be
used with 2-channel audio sources.
(3) 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 ( ) but also regular
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 24, 25).
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
II 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
When either of these signals is input to the AVR-550SD, the surround mode is automatically set to Dolby
Pro Logic
II when the “DOLBY/DTS SURROUND” mode is selected.
2 Sources recorded in Dolby Surround are indicated with the logo mark shown below.
Dolby Surround support mark:
2 Dolby Digital compatible media and playback methods
Marks indicating Dolby Digital compatibility: .
The following are general examples. Also refer to the player’s operating instructions.
Media
LD (VDP)
DVD
Others
(satellite broadcasts, CATV, etc.)
Dolby Digital output jacks
Coaxial Dolby Digital RF output jack
1
Optical or coaxial digital output
(same as for PCM) 2
Optical or coaxial digital output
(same as for PCM)
Playback method (reference page)
Set the input mode to “AUTO”.
(Page 19)
Set the input mode to “AUTO”.
(Page 19)
Set the input mode to “AUTO”.
(Page 19)
1 Please use a commercially available adapter when connecting the Dolby Digital RF output jack of the
LD player to the digital input jack.
Please refer to the instruction manual of the adapter when making connection.
2 Some DVD digital outputs have the function of switching the Dolby Digital signal output method
between “bit stream” and “(convert to) PCM”. When playing in Dolby Digital surround on the AVR-
550SD, switch the DVD player’s output mode to “bit stream”. In some cases players are equipped with
both “bit stream + PCM” and “PCM only” digital outputs. In this case connect the “bit stream + PCM”
jacks to the AVR-550SD.
Media
CD
LD (VDP)
DVD
Dolby Digital output jacks
Optical or coaxial digital output
(same as for PCM) 2
Optical or coaxial digital output
(same as for PCM) 2
Optical or coaxial digital output
(same as for PCM) 3
Playback method (reference page)
Set the input mode to “AUTO” or “DTS” (page 19).
Never set the mode to “ANALOG” or “PCM”. 1
Set the input mode to “AUTO” or “DTS” (page 19).
Never set the mode to “ANALOG” or “PCM”. 1
Set the input mode to “AUTO” or “DTS” (page 19).
DTS Digital Surround
Digital Theater 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.
2 DTS compatible media and playback methods
Marks indicating DTS compatibility: and .
The following are general examples. Also refer to the player’s operating instructions.
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 AVR-550SD, 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 AVR-550SD (see page 23)
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. ©1996,
2000 Digital Theater Systems, Inc. All Rights Reserved.
… 42 …

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