Denon AVR-1905 Operating Instructions Manual

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38ENGLISHManufactured under license from Dolby Laboratories.“Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories.(3) Dolby Pro Logic II• Dolby Pro Logic II is a new multi-channel playback format developed by Dolby Laboratories using feedbacklogic 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 regularstereo sources into five channels (front left, front right, center, surround left and surround right) to achievesurround 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 channelswere monaural (the surround left and right channels were the same) with previous Dolby Pro Logic, butDolby 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 achieveoptimum decoding (see page 30).Sources recorded in Dolby SurroundThese are sources in which three or more channels of surround have been recorded as two channels ofsignals using Dolby Surround encoding technology.Dolby Surround is used for the sound tracks of movies recorded on DVDs, LDs and Video cassettes to beplayed on stereo VCRs, as well as for the stereo broadcast signals of FM radio, TV, satellite broadcasts andcable TV.Decoding these signals with Dolby Pro Logic II makes it possible to achieve multi-channel surroundplayback. The signals can also be played on ordinary stereo equipment, in which case they provide normalstereo sound.There are two types of DVD Dolby surround recording signals.q 2-channel PCM stereo signalsw 2-channel Dolby Digital signalsWhen either of these signals is input to the AVR-1905, the surround mode is automatically set to DolbyPro Logic II when the “DOLBY/DTS SURROUND” mode is selected.2 Sources recorded in Dolby Surround are indicated with the logo mark shown belowDolby Surround support mark:MediaCDLD (VDP)DVDDolby Digital output jacksOptical or coaxial digital output(same as for PCM) 2Optical or coaxial digital output(same as for PCM) 2Optical or coaxial digital output(same as for PCM) 3Playback method (reference page)Set the input mode to “AUTO” or “DTS” (page 20).Never set the mode to “ANALOG” or “PCM”. 1Set the input mode to “AUTO” or “DTS” (page 20).Never set the mode to “ANALOG” or “PCM”. 1Set the input mode to “AUTO” or “DTS” (page 20).DTS Digital SurroundDigital Theater Surround (also called simply DTS) is a multi-channel digital signal format developed by DigitalTheater Systems.DTS offers the same “5.1” playback channels as Dolby Digital (front left, front right and center, surround left andsurround 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 forDVDs) so it operates with a relatively low compression rate. Because of this the amount of data is great, andwhen 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 recordedsimultaneously 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 twochannels on current CDs). They do not include picture data, but they offer surround playback on CD players thatare 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 ownlistening room.2 DTS compatible media and playback methodsMarks 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. Ifthis noise is played with the amplifier set at a very high volume, it may possibly cause damage to thespeakers. To avoid this, be sure to switch the input mode to “AUTO” or “DTS” before playing CDs or LDsrecorded in DTS. Also, never switch the input mode to “ANALOG” or “PCM” during playback. The sameholds true when playing CDs or LDs on a DVD player or LD/DVD compatible player. For DVDs, the DTSsignals 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 signalprocessing (output level adjustment, sampling frequency conversion, etc.). In this case the DTS-encodedsignals may be processed erroneously, in which case they cannot be decoded by the AVR-1905, or mayonly produce noise. Before playing DTS signals for the first time, turn down the master volume to a lowlevel, start playing the DTS disc, then check whether the DTS indicator on the AVR-1905 (see page 20)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 logois 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 digitaloutput for DTS playback of DTS-encoded DVDs.MANUFACTURED UNDER LICENSE FROM DIGITAL THEATER SYSTEMS, INC.U.S. PAT. NO’S. 5,451,942; 5,956,674; 5,974,380; 5,978,762; 6,226,616; 6,487,535 AND OTHER U.S. ANDWORLD–WIDE PATENTS ISSUED AND PENDING.“DTS”, “DTS–ES”, “Neo:6”, AND “DTS 96/24” ARE TRADEMARKS OF DIGITAL THEATER SYSTEMS, INC.© 1996, 2003 DIGITAL THEATER SYSTEMS, INC. ALL RIGHTS RESERVED.