Denon AVR-2105 Operating Instructions Manual

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41ENGLISHDTS-ES Extended Surround™DTS-ES Extended Surround is a new multi-channel digital signal format developed by Digital Theater SystemsInc. While offering high compatibility with the conventional DTS Digital Surround format, DTS-ES ExtendedSurround greatly improves the 360-degree surround impression and space expression thanks to further expandedsurround 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 theSB (Surround Back, sometimes also referred to as “surround center”) channel for surround playback with a totalof 6.1 channels. DTS-ES Extended Surround includes two signal formats with different surround signal recordingmethods, as described below.2 DTS-ES™ Discrete 6.1DTS-ES Discrete 6.1 is the newest recording format. With it, all 6.1 channels (including the SB channel) arerecorded independently using a digital discrete system. The main feature of this format is that because theSL, SR and SB channels are fully independent, the sound can be designed with total freedom and it is possibleto achieve a sense that the acoustic images are moving about freely among the background soundssurrounding the listener from 360 degrees.Though maximum performance is achieved when sound tracks recorded with this system are played using aDTS-ES decoder, when played with a conventional DTS decoder the SB channel signals are automaticallydown-mixed to the SL and SR channels, so none of the signal components are lost.2 DTS-ES™ Matrix 6.1With this format, the additional SB channel signals undergo matrix encoding and are input to the SL and SRchannels beforehand. Upon playback they are decoded to the SL, SR and SB channels. The performance ofthe encoder used at the time of recording can be fully matched using a high precision digital matrix decoderdeveloped by DTS, thereby achieving surround sound more faithful to the producer’s sound design aims thanwith conventional 5.1- or 6.1-channel systems.In addition, the bit stream format is 100% compatible with conventional DTS signals, so the effect of theMatrix 6.1 format can be achieved even with 5.1-channel signal sources. Of course it is also possible to playDTS-ES Matrix 6.1 encoded sources with a DTS 5.1-channel decoder.When DTS-ES Discrete 6.1 or Matrix 6.1 encoded sources are decoded with a DTS-ES decoder, the format isautomatically detected upon decoding and the optimum playing mode is selected. However, some Matrix 6.1sources may be detected as having a 5.1-channel format, so the DTS-ES Matrix 6.1 mode must be set manuallyto play these sources.(For instructions on selecting the surround mode, see page 28.)The DTS-ES decoder includes another function, the DTS Neo:6 surround mode for 6.1-channel playback of digitalPCM and analog signal sources.2 DTS Neo:6™ surroundThis mode applies conventional 2-channel signals to the high precision digital matrix decoder used for DTS-ESMatrix 6.1 to achieve 6.1-channel surround playback. High precision input signal detection and matrixprocessing enable full band reproduction (frequency response of 20 Hz to 20 kHz or greater) for all 6.1channels, and separation between the different channels is improved to the same level as that of a digitaldiscrete system.DTS Neo:6 surround includes two modes for selecting the optimum decoding for the signal source.• DTS Neo:6 CinemaThis mode is optimum for playing movies. Decoding is performed with emphasis on separation performanceto achieve the same atmosphere with 2-channel sources as with 6.1-channel sources.This mode is effective for playing sources recorded in conventional surround formats as well, because thein-phase component is assigned mainly to the center channel (C) and the reversed phase component to thesurround (SL, SR and SB channels).• DTS Neo:6 MusicThis mode is suited mainly for playing music. Changes in the sound quality are reduced by decoding withemphasis on the front channel signals (FL and FR), and a natural sense of expansion is given to the soundfield by the effect of the surround signals output from the center (C) and surround (SL, SR and SB) channels.DTS 96/24The sampling frequency, number of bits and number of channels used for recording of music, etc., in studios hasbeen increasing in recent years, and there are a growing number of high quality signal sources, including 96kHz/24 bit 5.1-channel sources.For example, there are high picture/sound quality DVD video sources with 96 kHz/24 bit stereo PCM audio tracks.However, because the data rate for these audio tracks is extremely high, there are limits to recording them ontwo channels only, and since the quality of the pictures must be restricted it is common to only include stillpictures.In addition, 96 kHz/24 bit 5.1-channel surround is possible with DVD audio sources, but DVD audio players arerequired to play them with this high quality.DTS 96/24 is a multi-channel digital signal format developed by Digital Theater Systems Inc. in order to deal withthis situation.Conventional surround formats used sampling frequencies of 48 or 44.1 kHz, so 20 kHz was about the maximumplayback signal frequency. With DTS 96/24, the sampling frequency is increased to 96 or 88.2 kHz to achieve awide frequency range of over 40 kHz.In addition, DTS 96/24 has a resolution of 24 bits, resulting in the same frequency band and dynamic range as 96kHz/24 bit PCM.As with conventional DTS Surround, DTS 96/24 is compatible with a maximum of 5.1 channels, so sourcesrecorded using DTS 96/24 can be played in high sampling frequency, multiple channel audio with such normalmedia as DVD videos and CDs.Thus, with DTS 96/24, the same 96 kHz/24 bit multi-channel surround sound as with DVD-Audio can be achievedwhile viewing DVD-Video images on a conventional DVD-Video player ( 1). Furthermore, with DTS 96/24compatible CDs, 88.2 kHz/24 bit multi-channel surround can be achieved using normal CD/LD players ( 1).Even with the high quality multi-channel signals, the recording time is the same as with conventional DTSsurround sources.What’s more, DTS 96/24 is fully compatible with the conventional DTS surround format, so DTS 96/24 signalsources can be played with a sampling frequency of 48 kHz or 44.1 kHz on conventional DTS or DTS-ES surrounddecoders ( 2).1 A DVD player with DTS digital output capabilities (for CD/LD players, a player with digital outputs forconventional DTS CDs/LDs) and a disc recorded in DTS 96/24 are required.2 The resolution is 24 or 20 bits, depending on the decoder.