Denon AVR-4806CI Operating Instructions Manual

Also see for AVR-4806CI: User manual Service manual Capabilities and Compatibilities Guide Specifications

Contents

151Additional Information[4] DTS 96/24The sampling frequency, number of bits and number ofchannels used for recording of music, etc., in studios hasbeen increasing in recent years, and there are a growingnumber of high quality signal sources, including 96 kHz/24bit 5.1-channel sources.For example, there are high picture/sound quality DVDvideo sources with 96 kHz/24 bit stereo PCM audio tracks.However, because the data rate for these audio tracks isextremely high, there are limits to recording them on twochannels only, and since the quality of the pictures mustbe restricted it is common to only include still pictures.In addition, 96 kHz/24 bit 5.1-channel surround is possiblewith DVD audio sources, but DVD audio players arerequired to play them with this high quality.DTS 96/24 is a multi-channel digital signal formatdeveloped by Digital Theater Systems, Inc. in order to dealwith this situation.Conventional surround formats used sampling frequenciesof 48 or 44.1 kHz, so 20 kHz was about the maximumplayback signal frequency. With DTS 96/24, the samplingfrequency is increased to 96 or 88.2 kHz to achieve a widefrequency range of over 40 kHz.In addition, DTS 96/24 has a resolution of 24 bits, resultingin the same frequency band and dynamic range as 96kHz/24 bit PCM.As with conventional DTS Surround, DTS 96/24 iscompatible with a maximum of 5.1 channels, so sourcesrecorded using DTS 96/24 can be played in high samplingfrequency, multiple channel audio with such normal mediaas DVD videos and CDs.Thus, with DTS 96/24, the same 96 kHz/24 bit multi-channel surround sound as with DVD-Audio can beachieved while viewing DVD-Video images on aconventional DVD-Video player ( 1). Furthermore, withDTS 96/24 compatible CDs, 88.2 kHz/24 bit multi-channelsurround can be achieved using normal CD/LD players (1).Even with the high quality multi-channel signals, therecording time is the same as with conventional DTSsurround sources.What’s more, DTS 96/24 is fully compatible with theconventional DTS surround format, so DTS 96/24 signalsources can be played with a sampling frequency of 48kHz 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 inDTS 96/24 are required.2 The resolution is 24 or 20 bits, depending on thedecoder.[5] Home THX Cinema SurroundTHX is an exclusive set of standards and technologiesestablished by the world-renowned film productioncompany, Lucasfilm Ltd. THX grew from George Lucas’personal desire to make your experience of the filmsoundtrack, in both movie theaters and in your hometheater, as faithful as possible to what the directorintended.Movie soundtracks are mixed in special movie theaterscalled dubbing stages and are designed to be played backin movie theaters with similar equipment and conditions.The soundtrack created for movie theaters is thentransferred directly onto Laserdisc, VHS tape, DVD, etc.,and is not changed for playback in a small home theaterenvironment.THX engineers developed patented technologies toaccurately translate the sound from the movie theaterenvironment into the home, correcting the tonal andspatial errors that occur. On the AVR-4806CI, when theHome THX Cinema mode is on, THX post-processing isautomatically added after the Dolby Pro Logic, DolbyDigital or DTS decoder:¢ Re-EQ™ (Re-Equalization)The tonal balance of a film soundtrack will be excessivelybright and harsh when played back over audio equipmentin the home because film soundtracks are designed to beplayed back in large movie theaters using very differentprofessional equipment. Re-Equalization restores thecorrect tonal balance for listening to a movie soundtrack ina normal home environment.¢ Timbre Matching™The human ear changes our perception of a sounddepending on the direction from which the sound iscoming. In a movie theater, there is an array of surroundspeakers so that the surround information is all aroundyou. In a home theater, only two speakers located to theside of your head are used. The Timbre Matching featurefilters the information going to the surround speakers sothat they more closely match the tonal characteristics ofthe sound coming from the front speakers. This ensuresseamless panning between the front and surroundspeakers.¢ Adaptive Decorrelation™In a movie theater, a large number of surround speakershelp create an enveloping surround sound experience,while in a home theater there are usually only twospeakers. This can make the surround speakers sound likeheadphones that lack spaciousness and envelopment. Thesurround sounds will also collapse into the closest speakeras you move away from the middle seating position.Adaptive Decorrelation slightly changes one surroundchannel’s time and phase relationship with respect to theother surround channel. This expands the listening positionand creates—with only two speakers—the same spacioussurround experience as in a movie theater.