Yamaha RX-V365 Owner's Manual

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43 EnEnglishINTRODUCTIONADDITIONALINFORMATION APPENDIXPREPARATIONBASICOPERATIONADVANCEDOPERATION■ Audio informationDolby DigitalDolby Digital is a digital surround sound system that gives youcompletely independent multi-channel audio. With 3 front channels(front L/R and center), and 2 surround stereo channels, Dolby Digitalprovides 5 full-range audio channels. With an additional channelespecially for bass effects, called LFE (Low Frequency Effect), thesystem has a total of 5.1-channels (LFE is counted as 0.1 channel). Byusing 2-channel stereo for the surround speakers, more accuratemoving sound effects and surround sound environment are possiblethan with Dolby Surround. The wide dynamic range from maximumto minimum volume reproduced by the 5 full-range channels and theprecise sound orientation generated using digital sound processingprovide listeners with unprecedented excitement and realism. Withthis unit, any sound environment from monaural up to a 5.1-channelconfiguration can be freely selected for your enjoyment.Dolby Pro Logic IIDolby Pro Logic II is an improved technique used to decode vastnumbers of existing Dolby Surround sources. This new technologyenables a discrete 5-channel playback with 2 front left and rightchannels, 1 center channel, and 2 surround left and right channelsinstead of only 1 surround channel for conventional Pro Logictechnology. There are three modes available: “Music mode” for musicsources, “Movie mode” for movie sources and “Game mode” forgame sources.Dolby SurroundDolby Surround uses a 4-channel analog recording system toreproduce realistic and dynamic sound effects: 2 front left and rightchannels (stereo), a center channel for dialog (monaural), and asurround channel for special sound effects (monaural). The surroundchannel reproduces sound within a narrow frequency range. DolbySurround is widely used with nearly all video tapes and laser discs,and in many TV and cable broadcasts as well. The Dolby Pro Logicdecoder built into this unit employs a digital signal processing systemthat automatically stabilizes the volume on each channel to enhancemoving sound effects and directionality.DTS Digital SurroundDTS digital surround was developed to replace the analog soundtracksof movies with a 5.1-channel digital sound track, and is now rapidlygaining popularity in movie theaters around the world. DTS, Inc. hasdeveloped a home theater system so that you can enjoy the depth ofsound and natural spatial representation of DTS digital surround inyour home. This system produces practically distortion-free 5.1-channel sound (technically, left, right and center channels, 2 surroundchannels, plus an LFE 0.1 channel as a subwoofer, for a total of 5.1-channels).LFE 0.1 channelThis channel reproduces low-frequency bass signals. The frequencyrange of this channel is from 20 Hz to 120 Hz. This channel is countedas 0.1 because it only enforces a low-frequency range compared to thefull-range reproduced by the other 5 channels in Dolby Digital or DTS5.1-channel systems.PCM (Linear PCM)Linear PCM is a signal format under which an analog audio signal isdigitized, recorded and transmitted without using any compression.This is used as a method of recording CDs and DVD audio. The PCMsystem uses a technique for sampling the size of the analog signal pervery small unit of time. Standing for “Pulse Code Modulation,” theanalog signal is encoded as pulses and then modulated for recording.Sampling frequency and number of quantizedbitsWhen digitizing an analog audio signal, the number of times thesignal is sampled per second is called the sampling frequency, whilethe degree of fineness when converting the sound level into a numericvalue is called the number of quantized bits. The range of rates thatcan be played back is determined based on the sampling rate, whilethe dynamic range representing the sound level difference isdetermined by the number of quantized bits. In principle, the higherthe sampling frequency, the wider the range of frequencies that can beplayed back, and the higher the number of quantized bits, the morefinely the sound level can be reproduced.■ Sound field program informationCINEMA DSPSince the Dolby Surround and DTS systems were originally designedfor use in movie theaters, their effect is best felt in a theater havingmany speakers designed for acoustic effects. Since home conditions,such as room size, wall material, number of speakers, and so on, candiffer so widely, it is inevitable that there are differences in the soundheard. Based on a wealth of actually measured data, YamahaCINEMA DSP uses Yamaha original DSP technology to combineDolby Pro Logic, Dolby Digital and DTS systems to provide theaudiovisual experience of movie theater in the listening room of yourown home.SILENT CINEMAYamaha has developed a natural, realistic sound effect DSP algorithmfor headphones. Parameters for headphones have been set for eachsound field program so that accurate representations of all the soundfield programs can be enjoyed on headphones.Virtual CINEMA DSPYamaha has developed a Virtual CINEMA DSP algorithm that allowsyou to enjoy DSP surround effects even without any surroundspeakers by using virtual surround speakers. It is even possible toenjoy Virtual CINEMA DSP using a minimal two-speaker system thatdoes not include a center speaker.■ Video informationComponent video signalWith the component video signal system, the video signal is separatedinto the Y signal for the luminance and the P B and PR signals for thechrominance. Color can be reproduced more faithfully with thissystem because each of these signals is independent. The componentsignal is also called the “color difference signal” because theluminance signal is subtracted from the color signal. A monitor withcomponent input jacks is required in order to output componentsignals.Composite video signalWith the composite video signal system, the video signal is composedof three basic elements of a video picture: color, brightness andsynchronization data. A composite video jack on a video componenttransmits these three elements combined.Glossary

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