Model DP564 Multichannel Audio Decoder User’s Manual Issue 1 Part Number 91830
DP564 Multichannel Audio Decoder Dolby Laboratories, Inc. Corporate Headquarters Dolby Laboratories, Inc. 100 Potrero Avenue San Francisco, CA 94103-4813 Telephone 415-558-0200 Fax 415-863-1373 www.dolby.com European Headquarters Dolby Laboratories, Inc. Wootton Bassett Wiltshire, SN4 8QJ, England Telephone (44) 1793-842100 Fax (44) 1793-842101 Dolby, Pro Logic, and the double-D symbol are registered trademarks of Dolby Laboratories. Surround EX is a trademark of Dolby Laboratories.
DP564 Multichannel Audio Decoder Table of Contents List of Figures ............................................................................................................................ vi List of Tables.............................................................................................................................. vi Regulatory Notices and Fusing Information .................................................................... vii Fusing Information.......................................
DP564 Multichannel Audio Decoder 4.4 Setup Menu .............................................................................................. 4-6 4.4.1 Operating Mode ........................................................................... 4-7 4.4.2 Monitor Control ........................................................................... 4-8 4.4.3 User Presets................................................................................ 4-12 4.4.4 I/O Control ......................................
DP564 Multichannel Audio Decoder Chapter 8 Streaming Server and Remote Software ............................................ 8-1 8.1 DolbyRemote 564 .................................................................................... 8-1 8.2 Hardware Connection .............................................................................. 8-1 8.3 Installing DolbyRemote 564 .................................................................... 8-1 8.4 Launching the Application................................
DP564 Multichannel Audio Decoder List of Figures Figure 1-1 DP564 System Block Diagram .................................................................................. 1-3 Figure 2-1 Connection Ports for Digital Signals ......................................................................... 2-1 Figure 2-2 Connection Ports for Optical, Ethernet, Remote, and GPI/O .................................... 2-2 Figure 3-1 Front-Panel Controls .....................................................................
DP564 Multichannel Audio Decoder Regulatory Notices and Fusing Information FCC This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
DP564 Multichannel Audio Decoder EU This equipment complies with the EMC requirements of EN55103-1 and EN55103-2 when operated in an E2 environment in accordance with this manual. IMPORTANT SAFETY NOTICE This unit complies with the safety standard EN60065. The unit shall not be exposed to dripping or splashing and no objects filled with liquids, such as coffee cups, shall be placed on the equipment.
DP564 Multichannel Audio Decoder Fusing Information WARNING: To reduce the risk of fire, replace fuses only with the same type and rating. The DP564 uses a universal switching power supply that handles the full range of nominal mains voltages between 90 and 264 VAC and any frequency between 50 and 60 Hz. Main Fuse The main fuse rating is: T 1A L (1 amp, 250 V, 20 mm, time-lag, low breaking capacity) for all operating voltages.
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DP564 Multichannel Audio Decoder Chapter 1 Introduction The DP564 Multichannel Audio Decoder gives studio professionals unparalleled ability to monitor different audio programs in a variety of listening modes. Critical monitoring is essential to ensure that the highest quality audio reaches your listeners at home.
DP564 Multichannel Audio Decoder Introduction Note: The processing sequence is not identical to that of a consumer decoder. To efficiently deliver all the available features, downmixing is separated from the decoding block.
DP564 Multichannel Audio Decoder Introduction Figure 1-1 DP564 System Block Diagram The 2-U rack-mount unit features multiple inputs including two AES3 inputs, a Toslink optical input, and an Ethernet port for RTP-streaming Dolby Digital audio. The inputs are easily selected with dedicated front-panel buttons. The front panel also incorporates a display screen, featuring high contrast and a wide viewing angle.
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DP564 Multichannel Audio Decoder Chapter 2 Installation This chapter covers the physical connections necessary to operate the DP564. 2.1 Mounting The DP564 occupies 2U of rack space. The unit operates at ambient temperatures up to 122° F (50° C) and vents from front to rear. Caution: Do not mount the DP564 directly above heat-generating equipment. Ensure adequate ventilation. The temperature inside a poorly ventilated rack can be considerably higher than ambient room temperature. 2.
DP564 Multichannel Audio Decoder Installation signal on to another unit; if pass-through is not necessary, this connector should be fitted with a 75-ohm terminator. The Digital In connectors, AES 1 and AES 2, can receive both Dolby® Digital and PCM signals. The decoder recognizes each signal type and processes the signal appropriately. Digital inputs can also be received using the Optical In and 100BASE-T inputs shown in Figure 2-2. The LTC Out connector provides a SMPTE 12M linear timecode output signal.
DP564 Multichannel Audio Decoder 2.2.3 Installation Analog Outputs The +4 dBu balanced Analog Audio Outputs connect directly to your monitoring system. Each connector is labeled according to the channel signal it sends. If your system includes a single speaker for Back Surround, use only the Bsl output, and leave the Bsr output open. 2.2.4 Power The main fuse rating is: T 1A L (1 amp, 250 V, 20 mm, time-lag, low breaking capacity) for all operating voltages.
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DP564 Multichannel Audio Decoder Chapter 3 Front-Panel Controls Every function of the DP564, except control of streaming audio, is accessible using the front-panel buttons in combination with the information on the display screen. This chapter covers • • • • Front-panel layout Button functions LED indicators The RS-232 connection Streaming audio can be controlled using the DolbyRemote 564 software. See Chapter 8, Streaming Server and Remote Software, for details. 3.
DP564 Multichannel Audio Decoder Front-Panel Controls one-touch recall of a complete set of parameter settings previously stored as a preset. Output-level controls set the volume level for your listening environment. Detailed explanations of each button function follow. 3.2 Button Functions Each button on the front panel controls a function or functions in the DP564. These functions are defined in this section. Any time a feature is active, the front-panel button associated with that feature is lit.
DP564 Multichannel Audio Decoder Front-Panel Controls menu. If you are in a setup menu, Status changes the display to a status menu. If you are in a setup menu, Setup brings up the top-level setup menu. If you are in a status menu, Status brings up the main status menu. ▲ moves the item selection in the display to the next item up. In the setup menu, if the current menu designates a numerical value, ▲ increases the value to the next higher increment. Brig htness ► navigates within and between menus.
DP564 Multichannel Audio Decoder Front-Panel Controls Decode Use the Decode buttons to select a specific surround-decoding mode. Note: Dolby Digital decoding is applied whenever a Dolby Digital signal is received. The Decode buttons offer additional processing options. Pro Logic II Pro Logic EX EX activates Dolby Digital Surround EX ™ decoding. It is available only when decoding Dolby Digital bitstreams with stereo surround channels.
DP564 Multichannel Audio Decoder 3.2.3 Front-Panel Controls Input Use the Input buttons to select the source for the input signal. Only one of these buttons is lit at a time, indicating the selected source: AES1, AES2, Optical, or Streaming. If the selected source receives an invalid signal, the Error LED turns red. 3.2.4 Preset Preset buttons 1, 2, 3, and 4 recall and store those preset configurations. To recall any one of those presets, press the associated button and release the button quickly.
DP564 Multichannel Audio Decoder 3.2.6 Front-Panel Controls Special Button Functions Under certain conditions, you may need to reset the DP564. Table 3-1 shows the button combinations to use in those cases. Table 3-1 Special Button Functions Function Action; Result Hardware Reset Press Shift + Esc + ► simultaneously; the DP564 reboots. Firmware Upgrade During reboot, press and hold Setup; the status display gives you the option of upgrading the unit firmware or completing the boot sequence.
DP564 Multichannel Audio Decoder 3.4 Front-Panel Controls RS-232 Connection The Remote RS-232 connection port can be used to connect for software updates, or to a computer running DolbyRemote 564. The DolbyRemote 564 application is far more efficient, however, when connected via the 100BASE-T port. For details, see Chapter 8, Streaming Server and Remote Software.
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DP564 Multichannel Audio Decoder Chapter 4 Menus Much of the versatility and power of the DP564 lies in its menu structure. This chapter covers: • • • • 4.1 Menu basics Hot-key function Status menu Setup menu Menu Basics The screen shows information on the current operating status via the status menu, and lets you adjust operational settings using the setup menu.
DP564 Multichannel Audio Decoder 4.2 Menus Hot-Key Functions Certain front-panel buttons activate a special function when you press and hold the button for two seconds. We refer to that function as the hot-key function. No matter what menu you are viewing, there are three front-panel buttons that display the setup menu for that function when you press and hold the button for two seconds: Pro Logic II, Custom, and Dim.
DP564 Multichannel Audio Decoder Menus If the selected input is receiving a valid Dolby® Digital signal, the display conveys important information about the input stream and the decoding status, as shown in Figure 4-3. Dolby Digital Dialog 48kHz Level Data Rate 448 Chan Mode 3/2L 00:00:00:00 29ND PL EX Preset 1 EB DH -27 Figure 4-3 Main Status Menu with a Valid Dolby Digital Input The main box displays the type of input, sample rate, data rate (in kbps), channel mode, and timecode.
DP564 Multichannel Audio Decoder Menus PCM Audio 44.1 kHz 20 Bit Consumer Preset 1 Figure 4-4 Main Status Menu with a Valid PCM Input The space above the line displays the type of input, sample rate, bit depth, and mode (Professional or Consumer) of the stream. The DP564 accepts inputs up to 96 kHz, downsampling higher sample rates for processing at 48 or 44.1 kHz. Below the line, you can still see the preset name and number, but the two-letter abbreviations do not apply to a PCM stream. 4.3.
DP564 Multichannel Audio Decoder 4.3.6 Menus Input Status The input status menu identifies the selected input in the menu title line. When a valid signal is present, information displays for signal lock, sample rate, signal type, and Emphasis, Bit-0, and Bit-1 informational bits. Emphasis reflects the setting of the channel status emphasis field in the input stream. Bit-0 indicates a professional or a consumer stream, and Bit-1 indicates whether the stream is audio or non-audio.
DP564 Multichannel Audio Decoder 4.3.8 Menus Timecode Status The Timecode Status menu includes: • • • A large timecode readout Frame rate Timestamp delay word The main status display also shows timecode information, according to settings in the Timecode Display setup menu. 4.3.9 Error Statistics When an error occurs, the front-panel Error LED is lit. The Error Stats menu supplies more detailed information to help troubleshoot the problem.
DP564 Multichannel Audio Decoder Menus Unit Setup Operating Mode Monitor Control User Presets I/O Control Monitor Configuration System Settings Figure 4-5 Main Setup Menu Scroll to select a menu item and press Enter or ► to display that item’s submenu. To change a parameter value, enter the parameter adjustment menu, and press ▲ or ▼ to adjust the parameter value. Press Enter to accept the new value selection and return to the next higher menu level.
DP564 Multichannel Audio Decoder Menus Detection Detection offers two options: Normal and Silent Switch. In Normal mode, an input that switches from PCM to Dolby Digital (if, for example, the complete bitstream information carried in a Dolby Digital signal is interrupted for some reason) may produce a short burst of noise at the transition point. Silent Switch eliminates that noise in most (but not all) instances; however, it adds latency to the PCM processing time.
DP564 Multichannel Audio Decoder • Speaker Mutes • LFE Mon Mode Menus Pro Logic Pro Logic is set either to Manual or Automatic. In Automatic, the DP564 applies Pro Logic® decoding according to the setting of the Dolby Srnd metadata parameter in a Dolby Digital 2/0 signal. You can use the front-panel buttons to apply Pro Logic II as soon as the Dolby Digital 2/0 input is locked.
DP564 Multichannel Audio Decoder Menus Pro Logic II The DP564 supports four Pro Logic II modes: Movie, Music, Pro Logic, and Matrix. Additional menus under Pro Logic II give you control over settings for Panorama, Dimension, and Center Width, which offer a variety of settings activated when in Music mode. Movie mode is the standard setting for programs with video.
DP564 Multichannel Audio Decoder Menus Karaoke The DP564 can process karaoke information in a Dolby Digital bitstream. In a karaoke bitstream, the standard Center, Left Surround, and Right Surround channels are replaced with a music channel and two vocal channels. Karaoke processing may only be applied to a karaoke bitstream. The Karaoke menu includes Karaoke Mode and Level/Pan. Karaoke Mode can be set to Unaware, Aware, or Capable, representing the different karaoke DVD systems available.
DP564 Multichannel Audio Decoder 4.4.3 Menus User Presets The DP564 stores up to 32 presets. Each preset includes all active settings. If you recall a preset, then change one parameter, the configuration with the one changed parameter is not stored unless you save it as a separate preset. Presets 29–32 are reserved by the factory configurations shown in Table 4-2.
DP564 Multichannel Audio Decoder Menus viewing, but if you activate any preset using the User Presets menu, the display goes to the main status menu upon activation. Save Preset Saving a preset stores every active setting. Be sure you have all parameters set correctly, then enter the Save Preset menu and choose the preset number you want to assign. You can give each preset a name with up to 12 characters.
DP564 Multichannel Audio Decoder Menus Clock Use the Clock menu to select the clock source for the DP564. Digital In locks the system to the currently selected digital input (AES1, AES2 or Optical). Ref In locks the system to the reference input (AES Ref)1. When locking to the reference input, sample rate converters are available if the digital input and reference input sample rates do not match. Ref In–SRC On applies sample-rate conversion (SRC) to the digital outputs.
DP564 Multichannel Audio Decoder 4.4.5 Menus Monitor Configuration The Monitor Configuration menu is used primarily to configure your listening environment for accurate monitoring of all content. For details on how to set up your listening room, see Chapter 5, Listening Room Calibration, which covers Digital Ref, Dim Gain, Channel Trims, Speaker Delays, and Speaker Config. 4.4.
DP564 Multichannel Audio Decoder Menus To enter text: 1. Press ► to select Del, then Enter to delete the text to the left of the flashing cursor. When the letter characters appear uppercase, ↓ changes them to lowercase. From the lowercase display, ↑ changes the letters to uppercase. Space inserts a single character space, Clear erases the whole text entry field. 2. Press the arrow buttons to select a letter or symbol, then Enter. The letter displays in the text entry field above the selection box. 3.
DP564 Multichannel Audio Decoder Menus The first line on this menu is IP Config, which lets you choose Manual or Automatic configuration. If you choose Automatic, the DP564 uses DHCP protocol to request an IP address from the network server. Note: Dynamic DNS updates must be enabled at the DHCP server for the DP564 automatic mode to register the host name on the network. The DNS server in the network should support Dynamic DNS. The default setting for Host Name is DP564.
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DP564 Multichannel Audio Decoder Chapter 5 Listening Room Calibration Setting up your listening environment is a crucial element in enabling you to properly evaluate content. Follow the procedures in this chapter carefully. You should only need to do this once for each monitor system or room; however, quick checks are advised before each session to confirm the correct calibration settings.
DP564 Multichannel Audio Decoder Listening Room Calibration 80 Hz, but if any of those speakers is particularly small, choose the highest frequency, 120 Hz. This setting not only produces better response from your system, but also protects small speakers from damage. In a system that includes a subwoofer, with all speakers set to Large, the crossover value is not applied. Back Surround Speakers Two Surround speakers (Ls, Rs) are used in standard 5.1-channel monitoring systems (setting: None).
DP564 Multichannel Audio Decoder Listening Room Calibration Note: Left and Right speakers should be equidistant from the reference listening position. If they are not, adjust the speaker positions.
DP564 Multichannel Audio Decoder Listening Room Calibration 3. Use the ▲▼ buttons to change the setting to match the value you calculated, then press Enter. 5.2.3 Back Surround Delay To calculate the setting for Back Surround delay: C – Bs = setting in ms for Surround delay To enter the Surround delay setting: 1. On the Monitor Configuration menu, select Speaker Delays, then press Enter. 2. Select Bsl/Bsr and press Enter to go to the Back Surround Bsl,Bsr menu. 3.
DP564 Multichannel Audio Decoder Listening Room Calibration To enter the Pro Logic delay setting: 1. On the Monitor Configuration menu, select Speaker Delays, then press Enter. 2. Select Pro Logic and press Enter to go to the Pro Logic Delay menu. 3. Use the ▲▼ buttons to change the setting to match the value you calculated, then press Enter. 5.
DP564 Multichannel Audio Decoder Listening Room Calibration For film work, test noise at reference level should produce an SPL of 85 dBC for each of the main front channels (Left, Center, Right) and 82 dBC for each Surround channel . The lower Surround level is specific to film-style mixing rooms. For television work, test noise at reference level is typically set to produce an SPL ranging from 79 to 82 dBC for each of the main five channels.
DP564 Multichannel Audio Decoder Listening Room Calibration Measuring SPL Before generating test noise, press Ref to check that the master volume level is set to 0 dB. Master volume should remain at 0 dB while you set channel trim levels. The Ref button remains lit as long as the master volume level is set to 0 dB. If the Ref light turns off, press Ref again to return the level to 0 dB.
DP564 Multichannel Audio Decoder Listening Room Calibration 3. Keep the SPL meter in this position. Make sure that the meter is aimed at the center speaker as you take readings for the Left, Center, and Right speakers. 4. To take the SPL readings for the Left Surround or Right Surround speakers, keep the meter at the same angle and position as you did for the front speakers. Turn your body 90 degrees from the Center speaker toward the wall closest to the Surround speaker you are measuring.
DP564 Multichannel Audio Decoder Listening Room Calibration For future reference, if you calibrate the subwoofer with an RTA, measure the calibrated level with an SPL meter and note the meter reading for the proper calibration. Use this measured value for quick future checks of the system calibration. When you have set trim levels for all channels, return to the Channel Trim menu, select Test Noise, select Off, and press Enter. 5.
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DP564 Multichannel Audio Decoder Chapter 6 Operating Modes The DP564 offers unique control and monitoring options. This chapter covers: • • 6.1 Monitoring modes Hardware remote control Monitoring Modes The front panel provides easy access to different monitoring modes. Control options include: • • • • Downmix Decoding Listening Compression Any time a feature is active, the front-panel button associated with that feature is lit.
DP564 Multichannel Audio Decoder Operating Modes Mono can only be activated when one of the two-channel downmixes is in use, or when the input is PCM or a 2/0 Dolby Digital program. We recommend that program mixers designate Lo/Ro as the source for mono downmixes. A mono output of the Lt/Rt mix is possible, however. Both Lo/Ro and Lt/Rt output to the Left and Right channels.
DP564 Multichannel Audio Decoder 6.1.3 Operating Modes Listening The Listening section provides the ability to emulate different listening environments at a single touch. • • • 6.1.4 Full uses all speaker outputs. The signals are routed to the speakers directly. 3 Stereo routes the Ls and Rs signals to Left and Right outputs, respectively. Phant (Phantom Center) mutes the Center output and splits the Center signal equally between Left and Right.
DP564 Multichannel Audio Decoder 6.2.1 Operating Modes Cat. No. 549 Configuration The Cat. No. 549 Config menu allows you to customize functions controlled by the Cat. No. 549 GPIO Controller. The initial display identifies which button is selected for configuration, and the active settings for that button. An example is shown in Figure 6-1. Cat.No.549 Config Button 4 Function Pro Logic II LED Sense Normal Figure 6-1 Cat. No.
DP564 Multichannel Audio Decoder Operating Modes Table 6-1 Cat. No.
DP564 Multichannel Audio Decoder Operating Modes 3. Choose the appropriate assignments, and press Enter to activate each change. 4. When you have configured the pin, press Esc to return to the GPI/O Pin Config menu, and repeat steps 1–3 as needed to configure other pins on the GPI/O Controller. Each pin is designated as an input or output pin as shown in Table 6-2. The available functions vary depending on whether you are configuring an input pin or an output pin.
DP564 Multichannel Audio Decoder Operating Modes Table 6-3 Functions Available for Assignment to Input Pins Bypass Preset 1 Preset 2 Preset 3 Preset 4 Preset 5 Preset 6 Preset 7 Preset 8 Preset 9 Preset 10 Preset 11 Preset 12 Preset 13 Preset 14 Preset 15 Preset 16 Preset 17 Preset 18 Preset 19 Preset 20 Preset 21 Preset 22 Preset 23 Preset 24 Preset 25 Preset 26 Preset 27 Preset 28 Preset 29 Preset 30 Preset 31 Preset 32 AES Input 1 AES Input 2 Optical Input 3 Streaming Input 4 Stereo Downmix Lt/Rt Dow
DP564 Multichannel Audio Decoder Operating Modes Table 6-4 Functions Available for Assignment to Output Pins Error External AES Ref Remote Control Dolby Digital Input Bypass Preset 1 Preset 2 Preset 3 Preset 4 Preset 5 Preset 6 Preset 7 Preset 8 Preset 9 Preset 10 Preset 11 Preset 12 Preset 13 Preset 14 Preset 15 Preset 16 Preset 17 Preset 18 Preset 19 Preset 20 Preset 21 Preset 22 Preset 23 Preset 24 Preset 25 Preset 26 Preset 27 Preset 28 Preset 29 Preset 30 Preset 31 Preset 32 AES Input 1 AES Input 2
DP564 Multichannel Audio Decoder Chapter 7 Using New Features This chapter is for users of the DP562, the predecessor to this model. It provides a quick look at the new features in the DP564, and a quick reference on how to access those features, including: • • • • • • • • • • • • • 7.
DP564 Multichannel Audio Decoder 7.3 Using New Features Enhanced Monitoring Control You have enhanced control over monitoring level and output control when using the DP564. The Master Volume knob and the Ref button make this adjustment quick and easy, and if you need to mute one or more channel outputs, you can do so using the menu screen as described on page 4-11. 7.4 Dedicated GPI/O Remote Control Capability One of the ways the DP564 can be controlled is by hardware remote.
DP564 Multichannel Audio Decoder 7.9 Using New Features Timecode Output The DP564 extracts the timecode from a Dolby Digital stream if timecode is present. This is used to generate a matching linear timecode output signal from the rear-panel LTC connection. This can be used to synchronize external equipment, such as a videotape machine, to follow the Dolby Digital bitstream. Details of timecode output are discussed under Clock on page 4-14. 7.
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DP564 Multichannel Audio Decoder Chapter 8 Streaming Server and Remote Software To activate the streaming audio input or to use the DolbyRemote 564 software by network connection, you need to configure the DP564 using the Network Settings menu as described starting on page 4-16. 8.1 DolbyRemote 564 DolbyRemote 564 provides quick access to virtually all DP564 functions. In addition, the application provides access to some features not available from the DP564 frontpanel interface.
DP564 Multichannel Audio Decoder Streaming Server and Remote Software CD-ROM Installation To install DolbyRemote 564 on your computer: 1. Place the CD-ROM in the PC. 2. The installation program should run automatically. If nothing happens, open the Run prompt (click the Start menu, then Run) and type d:\setup.exe (where d is the letter of your CD- or DVD-Rom drive). 3. Follow the on-screen prompts to install. 4. Use the default destination or select an alternate location for the software installation. 8.
DP564 Multichannel Audio Decoder 8.6 Streaming Server and Remote Software Streaming The Streaming tab enables you to select and control the streaming input. This functionality includes: • • • • • 8.6.1 Server location File selection Play, Pause, and Stop control Slide bar control for locating starting positions within a file +10 Seconds / –10 Seconds buttons Server Location Select the server location by selecting the server name on the local area network (LAN) that contains the Dolby® Digital (.
DP564 Multichannel Audio Decoder 8.7 Streaming Server and Remote Software Dolby Streaming Server The Dolby Streaming Server gives functionality to the computer where you store Dolby Digital files you want to decode via the streaming input on your DP564. Note: The DP564 only recognizes files that are stored in the directory defined when you install the Streaming Server program. 8.7.1 Installing the Dolby Streaming Server The Dolby Streaming Server software is provided on a CD-ROM.
DP564 Multichannel Audio Decoder Appendix A Metadata Note: This appendix was originally written for users of Dolby® E products that assign metadata parameter values. The DP564, as a decoder, simply uses the metadata parameters included in a Dolby Digital bitstream. However, the detailed explanation of metadata concepts and parameters may prove useful to you.
DP564 Multichannel Audio Decoder Appendix A: Metadata decoder processes the metadata stream according to parameters set by the program creator, as well as certain settings for bass management and dynamic range that are chosen by the consumer to reflect their specific home theater equipment and environmental conditions. Dolby E is a distribution bitstream capable of carrying up to eight channels of encoded audio and metadata. The number of programs ranges from one single program (Program Config: 5.
DP564 Multichannel Audio Decoder Appendix A: Metadata transparent to consumers, certain parameters affect the output of a home decoder, like when downmixing for a specific speaker configuration, or when the consumer chooses Dynamic Range Control to avoid disturbing family and neighbors. Figure A-1 shows a 5.1 + 2 Program Config consisting of a 5.1-channel program and a two-channel Secondary Audio Program (SAP). Multichannel Monitor System The Dolby E bitstream contains both the 5.
DP564 Multichannel Audio Decoder Appendix A: Metadata Both types of metadata can be examined, modified, or passed through during encoding. Table A-1 lists the active metadata parameters and indicates if each parameter is informational or control. Table A-1 Metadata Parameters Extended Bitstream Information parameters are in italics.
DP564 Multichannel Audio Decoder Appendix A: Metadata When received at the consumer’s Dolby Digital decoder, this parameter setting determines the level shift in the decoder that sets, or normalizes, the average audio output of the decoder to a preset level. This aids in matching audio volume between program sources.
DP564 Multichannel Audio Decoder Appendix A: Metadata The most important point to remember is that in setting the dialogue level parameter, you are providing your listener with an essential service. For your listeners, setting this level properly means: • • The volume level is consistent with other programs. The DRC profiles you make available to them work as you intend. Once dialogue level is set, you can set up DRC profiles to further benefit the consumer. A.
DP564 Multichannel Audio Decoder Appendix A: Metadata Note: While the use of DRC modes during decoding is a consumer-selectable feature, the dialogue level parameter setting is not. Therefore, the proper setting of the dialogue level parameter is essential before previewing a DRC profile. Line Mode Line Mode offers these features: • • • Low-level boost compression scaling is allowed. High-level cut compression scaling is allowed when not downmixing.
DP564 Multichannel Audio Decoder Appendix A: Metadata Dynamic Range Control Profiles in Ga y t i Un Early Cut Range Dialogue Level Setting Cut Range Null Band Centered at the Dialogue Level Setting Boost Range Low Ouput Level High Six preset DRC profiles are available to content producers: Film Light, Film Standard, Music Light, Music Standard, Speech, and None. Each is applied in the pattern shown in Figure A-2. All DRC profiles are encoded using a modified B-weighted curve.
DP564 Multichannel Audio Decoder Appendix A: Metadata • Music Standard Max Boost: 12 dB (below –55 dB) Boost Range: –55 dB to –31 dB (2:1 ratio) Null Band Width: 5 dB (–31 dB to –26 dB) Early Cut Range: –26 dB to –16 dB (2:1 ratio) Cut Range: –16 dB to +4 dB (20:1 ratio) • Speech Max Boost: 15 dB (below –50 dB) Boost Range: –50 dB to –31 dB (5:1 ratio) Null Band Width: 5 dB (–31 dB to –26 dB) Early Cut Range: –26 dB to –16 dB (2:1 ratio) Cut Range: –16 dB to +4 dB (20:1 ratio) • None No DRC profile s
DP564 Multichannel Audio Decoder Appendix A: Metadata It is important to consider the output signals from each piece of equipment that can receive a Dolby Digital program in the home. Table A-2 shows the output types from different equipment. Table A-2 Outputs from Various Dolby Digital Signal Processing Equipment Output Equipment Digital 5.1-Channel Analog r r 5.1-channel decoder r r Hi-end DVD player r r DVD player r 5.
DP564 Multichannel Audio Decoder Appendix A: Metadata In each of these devices, the analog stereo output is one of two different stereo downmixes. One type is a stereo-compatible Dolby Surround downmix (also called Pro Logic®, left-total/right-total, or Lt/Rt) of the multichannel source program that is suitable for Dolby Surround Pro Logic decoding.
DP564 Multichannel Audio Decoder Appendix A: Metadata Extended BSI parameters translate seamlessly to decoders that read only universal parameters. A.5.1 Universal Parameters Universal parameters are present in all Dolby Digital encoders and decoders. Dialogue Level The dialogue level parameter is discussed in Section A.2, Dialogue Level.
DP564 Multichannel Audio Decoder Appendix A: Metadata LFE Channel The status of the LFE Channel parameter indicates to a Dolby Digital encoder whether an LFE Channel is present within the bitstream. Channel Mode determines whether the LFE Channel parameter can be set. You must have at least three channels in order to be able to add an LFE channel. LFE Channel Setting Enable Disable Bitstream Mode This parameter describes the audio service contained within the Dolby Digital bitstream.
DP564 Multichannel Audio Decoder Appendix A: Metadata Bitstream Mode Setting Complete Main (CM) Main M&E (ME) Assc. Visual Imp. (VI) Assc. Hear Imp. (HI) Assc. Dialogue (D) Assc. Commentary (C) Assc. Emergency (E) Definition CM flags the bitstream as the Main Audio Service for the program and all elements are present to form a complete audio program. Currently, this is the most common setting. The CM Service may contain from one (mono) to six (5.1) channels.
DP564 Multichannel Audio Decoder Appendix A: Metadata RF Overmodulation Protection This parameter is designed to protect against overmodulation when a decoded Dolby Digital bitstream is RF modulated. When enabled the Dolby Digital encoder includes pre-emphasis in its calculations for RF Mode compression. The parameter has no effect when decoding using Line Mode compression. Except in rare cases, this parameter should be disabled.
DP564 Multichannel Audio Decoder Appendix A: Metadata Surround Downmix Level Setting Definition 0.707 (–3 dB) default The left and right surround channels are each attenuated 3 dB and sent to the left and right front channels, respectively. Same as above, but the signal is attenuated 6 dB. The surround channel(s) are discarded. 0.5 (–6 dB) 0 (–999 dB) Dolby Surround Mode This parameter indicates to a Dolby Digital decoding product that also contains a Dolby Pro Logic decoder (for example a 5.
DP564 Multichannel Audio Decoder Appendix A: Metadata environment matches that of the mixing room. This control operates in addition to the dialogue level control, and is best thought of as the final volume setting on the consumer’s equipment. This value can be determined by measuring the SPL of pink noise at studio reference level and then adding the amount of digital headroom above that level. For example, 85 dB equates to a reference level of –20 dBFS; the mixing level is 85+20, or 105 dB.
DP564 Multichannel Audio Decoder Appendix A: Metadata Note: The parameters DC Filter, Lowpass Filter, LFE Lowpass Filter, Surround 3 dB Attenuation, and Surround Phase Shift appear after the Extended BSI parameters on Dolby E and Dolby Digital equipment menus. DC Filter This parameter determines whether a DC blocking 3 Hz highpass filter is applied to the main input channels of a Dolby Digital encoder prior to encoding. This parameter is not carried to the consumer decoder.
DP564 Multichannel Audio Decoder Appendix A: Metadata Surround 3 dB Attenuation The Surround 3 dB Attenuation parameter determines whether the surround channel(s) are attenuated 3 dB before encoding. The attenuation actually takes place inside the Dolby Digital encoder. It balances the signal levels between theatrical mixing rooms (dubbing stages) and consumer mixing rooms (DVD or TV studios). Consumer mixing rooms are calibrated so that all five main channels are at the same sound pressure level (SPL).
DP564 Multichannel Audio Decoder Appendix A: Metadata Because the revised definitions affect metadata parameters that were not used by the consumer decoders, all decoders will be compatible with the revised bitstream. Newer decoders that are programmed to detect and decode the new parameters will be able to implement the new features the Extended BSI provides.
DP564 Multichannel Audio Decoder Appendix A: Metadata Lt/Rt Surround Mix Level This parameter indicates the level shift applied to the surround channels when downmixing to an Lt/Rt output. Its operation is similar to the surround downmix level in the universal metadata. Lt/Rt Surround Mix Level Setting 1.414 (+3.0 dB) 1.189 (+1.5 dB) 1.000 (0.0 dB) 0.841 (–1.5 dB) 0.707 (–3.0 dB) 0.595 (–4.5 dB) 0.500 (–6.0 dB) 0.
DP564 Multichannel Audio Decoder Appendix A: Metadata Lo/Ro Surround Mix Level This parameter indicates the level shift applied to the surround channels when downmixing to a Lo/Ro output. When Extended BSI parameters are active, this parameter is used, and the Surround Mix Level parameter in the universal parameters is not. Lo/Ro Surround Mix Level Setting 1.414 (+3.0 dB) 1.189 (+1.5 dB) 1.000 (0.0 dB) 0.841 (–1.5 dB) 0.707 (–3.0 dB) 0.595 (–4.5 dB) 0.500 (–6.0 dB) 0.
DP564 Multichannel Audio Decoder A.6 Appendix A: Metadata Metadata Combinations Table A-3 provides examples of combinations of parameters that could be used as a preset. Note: These parameter settings are provided as examples to demonstrate that different settings can be saved, named, and brought up as needed for quick use in different situations. The settings are not recommendations, but could provide a baseline starting point from which to create your own metadata values.
DP564 Multichannel Audio Decoder Appendix A: Metadata Extended Bitstream Information parameters are in italics. Parameter Lo/Ro Center Downmix Level Lo/Ro Surround Downmix Level Dolby Surround EX Mode A/D Converter Type DC Filter Lowpass Filter LFE Lowpass Filter Srnd 3 dB Atten Srnd Phase Shift Action Film (5.1) Drama (Lt/Rt) Local News (Mono) Music (5.
DP564 Multichannel Audio Decoder Appendix B Latency Values The latency of the DP564 is defined as the difference in time between the beginning of a valid Dolby® Digital frame entering the DP564 and the output of the first PCM sample represented by that frame. Note: At any sample rate, a Dolby Digital frame represents 1,536 audio samples. The DP564 accepts data over both professional and consumer industry standardized interfaces. The professional interface is specified by SMPTE2.
DP564 Multichannel Audio Decoder Appendix B: Latency Values Table B-1 shows the SMPTE Standard specified decoder latency with respect to the first word of the Dolby Digital frame (which is the reference point). Table B-1 SMPTE-Specified Latency B.2 Sample Rate Decoder Latency with Respect to Reference Point 48 kHz 44.1 kHz 32 kHz 32 ms 34.
DP564 Multichannel Audio Decoder Appendix B: Latency Values Table B-2 IEC 61937 Specified Latency, with Respect to Beginning of Dolby Digital (AC-3) burst payload Data Rate in kbps 56 64 80 96 112 128 160 192 224 256 320 384 448 512 576 640 Latency in Milliseconds Sample Rate: 48 kHz Sample Rate: 44.1 kHz Sample Rate: 32 kHz 6.11 6.22 6.44 6.67 6.89 7.11 7.56 8.00 8.44 8.89 9.78 10.67 11.56 12.44 13.33 14.22 6.73 6.86 7.12 7.38 7.65 7.91 8.44 8.96 9.49 10.02 11.07 12.12 13.18 14.23 15.28 16.34 9.
Virtual Dolby Technologies Test DVD Track List iv
DP564 Multichannel Audio Decoder Appendix C Specifications Audio Coding Algorithms Dolby® Digital, Dolby Surround Pro Logic®, Dolby Digital Surround EX™, Dolby Pro Logic II, Dolby Headphone Audio Input Sampling Rates 32, 44.1, 48, 88.2, or 96 kHz Audio Output Sampling Rates 32, 44.1, or 48 kHz Frequency Response Digital Outputs: 20 Hz to 20 kHz, ±0.01 dB Analog Outputs: 20 Hz to 20 kHz, ±0.5 dB Distortion <0.02%, 20 Hz to 10 kHz Dynamic Range >106 dB Trim Level Adjust +6 to –20 dB in 0.
DP564 Multichannel Audio Decoder Appendix C: Specifications Digital Audio Outputs Four BNC female connectors, unbalanced, 75Ω per AES-3ID-1995 (SMPTE 276M) Analog Audio Outputs 0 dBFS = +24 dBu; balanced floating; eight 3-pin male XLR connectors, 24-bit DAC Headphone Output +7 dBu maximum output into 50Ω nominal; 1/4-inch standard stereo headphone jack; level adjustable Linear Timecode Output One SMPTE 12M-1995, BNC female, unbalanced, nominal output signal 1 Vp–p, output impedance 50Ω Serial Remote Contr
DP564 Multichannel Audio Decoder Appendix C: Specifications Test Noise Auto: Sequences wideband or band-limited pink noise through enabled channels at two-second intervals Manual: Feeds continuous noise to selected channel when unit is in Trim Level mode Power Requirements 90 to 264 VAC, 50 to 60 Hz, auto-sensing, 40 W maximum; this unit is designed to operate from a centrally switched power source Dimensions and Weight 2-U rack-mount: 88 × 483 × 376 mm (3.5 × 19 × 14.8 inches) Net: 4 kg (8.
