Pioneer VSX-27TX, VSX-26TX Techno Tidbits & Problem-solving, Dolby Digital, Laser disc format

Page 72

Techno Tidbits & Problem-solving

Dolby Digital

Dolby Digital is a compression format which records the sound of 6 channels of the theater surround system (Dolby Digital) on the movie film digital track. Of the 6 channels, the sub woofer channel is intended for bass only, and because the frequency range is smaller than the main channel, it is expressed as 5.1 channel.

Dolby Digital is the name of the Dolby surround multi-channel digital system that was developed after the Dolby Surround System and Dolby Pro Logic Surround System.

5.1 channel digital

4 channel analog

surround track

sound track (Matrix)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dolby

Digital

encoding

Dolby Digital for movie films

The number of movies made using Dolby Digital since 1992 has exceeded 300 and continues to increase. For compact disc players and laser disc digital sounds, 16 bits are used to sample the original analog audio waveform and sampling is carried out 44,100 times every second. However because an enormous amount of recording signal data is required for the multi channel system with this method, AC-3 is used to compress the data.

In reproducing audio signals, the smaller the bit number used, the lower the sound quality. With AC-3, drop in auditory sound quality is prevented by using masking technology and digital filtering technology based on the human auditory characteristics.

Laser disc format

Laser discs are now available on the market in large numbers. This means that the recording of different format audio signals on the laser disc raises the important question of compatibility with existing laser discs. Dolby Digital tracks on Laser discs record signals using the space of one analog audio channel so it will maintain compatibility with existing discs and players.

As shown in the following figure, the digital audio sounds of Dolby Digital discs can be played back as currently done. Analog sounds are played back by using the other channel without the Dolby Digital signals for mono audio signals.

Analog sound

Dolby Digital

(Monaural)

sound

Digital sound

Video

Frequency

2

4

6

8

10

12

14 MHz

Comparison with Dolby Pro Logic Surround

Dolby Digital is also known as the 5.1 channel system. It is equipped with 5 channels (front left, front right, center, surround left, surround right) in the frequency range from 20 Hz to 20 kHz and an independent Low Frequency Effect (LFE) channel. The sub woofer channel is also called Low Frequency Effect (LFE).

The sub woofer channel can be used as desired to enjoy strong bass sounds.

The table on the next page shows the comparison with Dolby Pro Logic Surround effects.

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Contents VSX-27TXVSX-26TXVSX-24TX For Canadian model Important NoticeImportant Safety Instructions Information to UserFeatures Table of Contents Checking the Supplied Accessories How to Use This ManualPreparing the Remote Control Before You StartInstalling the Receiver Operating range of remote control unitOpening the Front Panel Inches 20 cmConnecting Your Equipment Cassette deck placementAudio Components Audio cordsVideo Components FrontAudio/Video cords Digital Connections Digital audio cords/Optical cablesOnly the VSX-27TX has a RF in jack Optical cableExample Connection for a DVD/LD or LD player VSX-26TXRFD-1 External Decoder Input Components equipped with 5.1 channel analog output jacksUsing external antennas AntennasAM loop antenna To improve FM receptionPowered sub woofer SpeakersSpeaker terminals Front SpeakersSpeaker placement Speaker impedance 26TX and 24TX onlyWhile holding down the Speakers button STANDBY/ONConnecting additional amplifiers Power connections AC OutletsSwitched Total 100 W 0.8 a MAX Unswitched 100 W 0.8 a MAXDisplays & Controls Display= Master Volume Front Panel VSX-27TX/26TXSignal Select button See p.40 @ Loudness button See p.42 Tape 2 Monitor button See p.60# Midnight button See p.41 $ Digital NR button See p.41Master Volume Front Panel VSX-24TX$ Signal Select button See p.40 # Digital NR button See p.41 + Speakers A/B buttonsVideo Input jacks See p.9 Input ATT buttonRemote Control System SET UP button Remote Setup button# Master Volume button Signal Select buttonSurround Sound Set Up Setting Up for Surround SoundPress System Setup button On Screen DisplayTo the mode you want. Then press Enter Go on to the next page to continue set upPress the 5or arrow buttons to move the hand Speaker Setting Select Speaker Setting with the 5´ buttonsSelect a speaker setting mode with the 2´3 buttons Press EnterFront default setting is Large Center default setting is LargeSurround default setting is Large SUB Woofer default setting is YESChannel Delay Speaker using the commands belowUse the 5´ buttons to select a speaker. Specify Distance from your listening position to eachChannel DELAY, it will already be selected Select aTEST Tone modeChannel Level Select Channel Level if continuing fromAuto mode Manu modeIf you are using a Sound Pressure Level SPL meter To exit before outputting the Test ToneSelect Exit to return to the System Setup Menu Crossover NetworkSpecify the crossover frequency for your small SpeakersSystem Setup Menu Bass Peak Level ManagerSelect Exit and press Enter to return to Range Control Use the 2 or 3 arrows to choose OFF, MID orMAX Digital-In Select Choose a Digital in and assign it an input functionUse the 2 or 3 to choose the input function that Matches the component hooked up to that digitalIndicator Basic PlaybackPlaying Sources with Stereo Sound ReceiverStandard mode Home THX Cinema modeSound Modes Stereo mode DSP modesHall JazzSelecting a Sound Mode Select the sound modeSurround operation Default setting is Stereo For more see Sound Modes p Playing Sources with Dolby Digital or DTS SoundMemo Switching ANALOG/DIGITAL Signal Input Signal SelectEach press switches the signal in the order below = Auto = Analog = Digital = AC-3RFListening in Midnight Listening Mode Reducing noise during playback Digital NR functionListening in Loudness Mode External decoder playback96kHz 24bit Performance Press External DecoderAdjusting bass and treble tone control Adjusting the brightness of the display front panel onlyDirect playback Using the Tuner Automatic and Manual TuningMPX Mode Direct Access Tuning Using the front panel Memorizing Frequently Used StationsTune in the desired station Press Memory to activate the memory functionUsing the remote control Recalling Memorized StationsUse the number buttons to select the channel you want To skip through each channel in orderRemote Control of Other components Setting Up the Remote Control to Control Other ComponentsRecalling preset codes Press Remote SetupPress Remote Setup to exit the Preset Recall Setup mode Press the Multi Control button forComponent you want to control Press the 2/3 buttons to choose the functionPress Remote Setup and 2 at the same time to Select the Learning Setup modeVideo Press Remote Setup to exit the Learning Setup Press the button to be programmedMode To program additional operations for the current componentUsing Remote Control with Other Components DVD or LD player operationsSource TOP MenuVCR & DVD video recorder operations Channel -/+Enter TV/VCR = MenuCD player operations DiscAllows you to change the display mode of the MD MD operationsDisc DISP/CHARA STB satellite tuner operations GuideExit MenuSTB DTV operations Press to switch the TV on or off TV operationsCassette deck operations Number buttons 1~6Using Other Functions Recording from Audio ComponentsRecord monitor Tape 2 Monitor Receiver in that function. Set the Signal Recording from Digital Audio ComponentsPrepare the source you want to record and put Select to digitalSet the Signal Select to analog Recording from Video ComponentsFirst, decide the component youd like to Record and put the receiver in that functionTo cancel Multi Operation Setup mode Press Remote SetupMulti Operations Using the system off button Performing multi operationsSetting up the direct function Press Remote Setup and 4 at the same timeTo select the Direct Function mode Remote Back LightResetting the Remote Control Erasing the learned remote control commandsErasing all signals learned & preset codes Erasing the multi operationsSet up example Multi-RoomMULTI-ROOM connections MULTI-ROOM set up VSX-27TX/26TX only Press System Setup on the remote controlRemote Setup Menu appears on your TV screen. You can AgainUsing the front panel 27TX/26TX with the MULTI-ROOM system Press the Multi Room & Source buttonPress the Control button Within ten seconds of , select the Function withPress Volume +/- to adjust the volume ClassReceiver Station -/+ Number 0~9Control Techno Tidbits & Problem-solving Dolby DigitalLaser disc format Comparison with Dolby Pro Logic SurroundDolby Digital DTSDolby Pro Logic SurroundTHX Preset Code List Troubleshooting Symptom Cause RemedyFM broadcasts AM broadcastsSet Signal Select to AnalogSpecifications VSX-26TX0 4 2 1 1 4 0 Power cord Caution Maintenance of External SurfacesEIA
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