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Dolby Laboratories DP564 User Manual

Dolby Laboratories DP564 User Manual

Multichannel audio decoder
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Model DP564
Multichannel Audio Decoder
User's Manual
Issue 1
Part Number 91830

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Summary of Contents for Dolby Laboratories DP564

  • Page 1 Model DP564 Multichannel Audio Decoder User’s Manual Issue 1 Part Number 91830...
  • Page 2 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. All other trademarks remain the property of their respective owners.

  • Page 3: Table Of Contents

    4.3.4 Monitor Status... 4-4 4.3.5 Metadata Status... 4-4 4.3.6 Input Status ... 4-5 4.3.7 AES Reference Input Status... 4-5 4.3.8 Timecode Status... 4-6 4.3.9 Error Statistics... 4-6 4.3.10 System Status ... 4-6 DP564 Multichannel Audio Decoder Table of Contents ... 2-1 Controls... 3-1...
  • Page 4 Dolby Headphone Processing ... 7-2 IFE Mode ... 7-2 Timecode Output ... 7-3 7.10 External AES Reference ... 7-3 7.11 Ethernet Software Remote Control... 7-3 7.12 Streaming ... 7-3 7.13 Karaoke ... 7-3 DP564 Multichannel Audio Decoder Calibration... 5-1 ... 6-1 ... 7-1...
  • Page 5 Dynamic Range Control Profiles ... A-8 Downmixing ... A-9 Parameter Definitions ... A-11 A.5.1 Universal Parameters ... A-12 A.5.2 Extended Bitstream Information Parameters ... A-19 Metadata Combinations ... A-23 Appendix B Latency Values ...B-1 Appendix C Specifications ...C-1 DP564 Multichannel Audio Decoder ... 8-1...
  • Page 6 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 ... 3-1 Figure 3-2 LED Indicators ...

  • Page 7: Regulatory Notices And Fusing Information

    N or coloured black. The core that is coloured brown must be connected to the terminal that is marked with the letter L or coloured red. This apparatus must be earthed. DP564 Multichannel Audio Decoder or coloured green or green...
  • Page 8 Gebruik alleen zekeringen van de aangegeven typen en waarden. Aansluiting van de unit alleen aan een geaarde wandcontactdoos. De netkabel die met de unit wordt geleverd, moet als volgt worden aangesloten: DP564 Multichannel Audio Decoder IMPORTANT SAFETY NOTICE Live—Brown Neutral—Blue Earth—Green/Yellow...

  • Page 9: 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.
  • Page 10 Virtual Dolby Technologies Test DVD Track List...

  • Page 11: Chapter 1 Introduction

    Pro Logic II decoding, making the DP564 the ideal digital reference decoder for both Dolby Digital and Dolby Surround audio. With the DP564, you can easily monitor all of Dolby Digital’s unique downmixing capabilities. This means content producers and providers can verify how material delivered in a 5.1-channel format will sound on systems that offer only Dolby...
  • Page 12 DP564 Multichannel Audio Decoder 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. AES1 (AES3 BNC) Dolby Digital AES2 (AES3 BNC) Bitstream...

  • Page 13: Figure 1-1 Dp564 System Block Diagram

    Ethernet port enable remote control and software updates; a remote control software application is included to configure and control the DP564 from a PC via Ethernet or serial connection. Remote control is also possible from an optional dedicated hardware controller—either the Dolby Cat.
  • Page 14 Virtual Dolby Technologies Test DVD Track List...

  • Page 15: Chapter 2 Installation

    This chapter covers the physical connections necessary to operate the DP564. 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.

  • Page 16: Optical In And Serial Ports

    DP564 Multichannel Audio Decoder signal on to another unit; if pass-through is not necessary, this connector should be fitted with a 75-ohm terminator. connectors, Digital In PCM signals. The decoder recognizes each signal type and processes the signal appropriately. Digital inputs can also be received using the inputs shown in Figure 2-2.

  • Page 17: Analog Outputs

    WARNING: Before applying power, check the main fuse using the procedure on page ix. There is no power switch on the DP564. To apply power, connect the power cord to a live outlet. connect directly to your monitoring Analog Audio Outputs output open.
  • Page 18 Virtual Dolby Technologies Test DVD Track List...

  • Page 19: 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.

  • Page 20: Button Functions

    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.

  • Page 21: Listening Modes

    DolbyRemote 564 software. When the DP564 is under remote control, remote control and re-activates all front-panel controls. Note: When the DP564 is under remote control, most front-panel controls are inactive. In this mode, the through the status menus, or press activates all front-panel controls.
  • Page 22 Custom Note: When downmixing, the DP564 automatically applies compression at peak moments to prevent potential signal overload from combining multiple channels, regardless of whether a compression mode is selected. buttons to select a specific surround-decoding mode.

  • Page 23: Input

    3.2.5 Output Level You can control the DP564 output level with the buttons. The headphone output has its own dedicated volume-control knob. Rotate Master Volume range of –95 to +10 dB.

  • Page 24: Special Button Functions

    DP564 Multichannel Audio Decoder 3.2.6 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. Function Hardware Reset Firmware Upgrade Factory Reset LED Indicators Figure 3-2 shows the LED lights on the front panel. Table 3-2 provides definitions of the LED indicators.

  • Page 25: Rs-232 Connection

    DP564 Multichannel Audio Decoder RS-232 Connection Remote RS-232 a computer running DolbyRemote 564. The DolbyRemote 564 application is far more efficient, however, when connected via the 8, Streaming Server and Remote Software. connection port can be used to connect for software updates, or to...
  • Page 26 Virtual Dolby Technologies Test DVD Track List...

  • Page 27: Status Menu

    Much of the versatility and power of the DP564 lies in its menu structure. This chapter covers: 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.

  • Page 28: Hot-Key Functions

    Timecode status Error Statistics System Status 4.3.1 Main Status Menu At power-up, the DP564 displays the main status menu. If there is no valid input, the main status screen shows No Input. , and . Holding Custom down is the only way to define the...

  • Page 29: Figure 4-3 Main Status Menu With A Valid Dolby Digital Input

    DP564 Multichannel Audio Decoder If the selected input is receiving a valid Dolby important information about the input stream and the decoding status, as shown in Figure 4-3. 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.

  • Page 30: Output Level Meters

    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.

  • Page 31: Input Status

    DP564 Multichannel Audio Decoder 4.3.6 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.

  • Page 32: Timecode Status

    Enter 4.3.10 System Status The top line of this menu displays the current DP564 software version number. To receive notification of software upgrades, register your product on the software upgrades page at The next lines show the current settings for IP address (IP), subnet mask (Mask), default gateway (Route), and DNS server (DNS).

  • Page 33: Operating Mode

    DP564 Multichannel Audio Decoder Scroll to select a menu item and press change a parameter value, enter the parameter adjustment menu, and press ▲ or ▼ to adjust the parameter value. Press the next higher menu level. To discard a new value selection and return to the next...

  • Page 34: Monitor Control

    Selecting Channel 1+2 requires a 32-bit input stream. When you select Auto, the DP564 locks onto the first signal it recognizes. If there are two 16-bit streams in a pair, Auto locks to the stream on Channel 1. Auto saves time, and is therefore recommended unless you know you have 16-bit signals on each channel of the pair, in which case you should specify which signal you want to process.
  • Page 35 Speaker Mutes LFE Mon Mode Pro Logic Pro Logic is set either to Manual or Automatic. In Automatic, the DP564 applies Pro Logic parameter in a Dolby Digital 2/0 signal. You can use the front-panel buttons to apply as soon as the Dolby Digital 2/0 input is locked. If the metadata...
  • Page 36 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.
  • Page 37 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.

  • Page 38: User Presets

    4.4.3 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.

  • Page 39: I/O Control

    DP564 Multichannel Audio Decoder 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.
  • Page 40 For details on configuring your device, see Section 6.2, Hardware Remote Control. If the input is selected with the clock source set to Digital In, the DP564 uses an internal clock at Streaming the sampling rate indicated by the streaming data. Ref In SRC Off uses the –...

  • Page 41: Monitor Configuration

    Unit Name You can give your unit a name, using up to 12 characters. This is useful to identify the DP564 from the DolbyRemote 564 software. You can also use the unit name for the screensaver. Select Unit Name, press shown in Figure 4-7.

  • Page 42: Settings Menu

    Timecode Status, displays all the available timecode information. Screensaver Timeout After a period of inactivity, the DP564 applies a screensaver to the display to preserve display life. Use the Screensaver Timeout menu to set the period of inactivity before the screensaver activates.
  • Page 43 The DNS server in the network should support Dynamic DNS. The default setting for Host Name is DP564. If you have more than one DP564 on the network, name each unit to uniquely identify it. If the network does not support automatic DNS configuration, choose Manual, or use IP address instead of host name to connect to the DP564.
  • Page 44 Virtual Dolby Technologies Test DVD Track List...

  • Page 45: Listening Room Calibration

    4. Assign a level to the one-touch Speaker Configuration Settings Use the Speaker Config menu to configure the DP564 to match your listening system. The settings for speaker size, subwoofer and crossover determine how the DP564 distributes low frequencies to your speakers. Settings that match your system allow the most accurate processing possible in your listening environment.

  • Page 46: Speaker Delay Values

    DP564 Multichannel Audio Decoder 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.

  • Page 47: Center Delay

    Example 3 shows that if C = L = R, Center delay should be set to 0 ms. If you set a negative time value for Center delay, the DP564 actually sets Center delay to 0 and adds corresponding delay time to the Left, Right, and Surround outputs.

  • Page 48: Back Surround Delay

    DP564 Multichannel Audio Decoder 3. Use the ▲▼ buttons to change the setting to match the value you calculated, then press 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.

  • Page 49: Calibration

    DP564 Multichannel Audio Decoder To enter the Pro Logic delay setting: 1. On the Monitor Configuration menu, select Speaker Delays, then press 2. Select Pro Logic and press 3. Use the ▲▼ buttons to change the setting to match the value you calculated,...
  • Page 50 2. Send a 1 kHz PCM tone at studio reference level to the 3. On the Digital Ref Auto Cal menu, select Yes, then press The DP564 sets the reference level to match the input. To manually set the digital reference level: 1.
  • Page 51 Adjust your amplifiers, self-powered speakers, or mixer, not the DP564 master volume. An overall attenuation of up to –20 dB can be applied using the DP564 master trim control. Beware that if the playback level is very high, you may risk damaging your speakers or possibly your hearing.

  • Page 52: Figure 5-1 Real Time Analyzer (Rta) Display

    Subwoofer Calibration The ideal test noise for subwoofer calibration should be band-limited pink noise, lowpass filtered at 120 Hz. The DP564 outputs band-limited pink noise (20 to 120 Hz) on the Subwoofer output. To properly calibrate the subwoofer, a real-time analyzer (RTA) is required.

  • Page 53: One-Touch Output Level Adjustment

    DP564 Multichannel Audio Decoder 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.
  • Page 54 Virtual Dolby Technologies Test DVD Track List...

  • Page 55: Chapter 6 Operating Modes

    DP564 Multichannel Audio Decoder options when a Dolby downmixing modes, but not in the listening modes Lo/Ro . The DP564 may route low-frequency signals from all or some of Chapter 6 Operating Modes ® Digital multichannel input signal is ®...

  • Page 56: Decoding

    DP564 Multichannel Audio Decoder can only be activated when one of the two-channel downmixes is in use, or Mono 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.

  • Page 57: Listening

    For more detailed information on compression modes, see Section A.3, Dynamic Range Control. Hardware Remote Control You can control the DP564 with a dedicated hardware remote control. When a GPI/O control device is connected to the rear-panel exclusive—the front-panel controls also remain active.

  • Page 58: Cat. No. 549 Configuration

    DP564 Multichannel Audio Decoder 6.2.1 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.

  • Page 59: Gpi/O Pin Configuration

    DP564 Multichannel Audio Decoder Table 6-1 Cat. No. 549 Default Button and LED Functions Cat. No. 549 GPIO Controller 6.2.2 GPI/O Pin Configuration The GPI/O Pin Config menu allows you to assign the functions your GPI/O device controls. The initial display identifies which pin is selected for configuration, and the active settings for that pin.

  • Page 60: Table 6-2 Default Gpi/O Pin Assignments

    DP564 Multichannel Audio Decoder 3. Choose the appropriate assignments, and press 4. When you have configured the pin, press 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.

  • Page 61: Table 6-3 Functions Available For Assignment To Input Pins

    DP564 Multichannel Audio Decoder 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...

  • Page 62: Table 6-4 Functions Available For Assignment To Output Pins

    DP564 Multichannel Audio Decoder 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...

  • Page 63: 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: Multiple inputs Expanded preset storage...

  • Page 64: Enhanced Monitoring Control

    4-11. Dedicated GPI/O Remote Control Capability One of the ways the DP564 can be controlled is by hardware remote. Dolby Laboratories makes the Cat. No. 549 GPIO Controller, which can be used with the DP564, or you can connect your own GPI/O device.

  • Page 65: Timecode Output

    Clock on page 4-14. 7.10 External AES Reference You can lock the DP564 output to the studio reference clock by plugging the studio reference to the option on the Clock menu. Details on the Clock menu options are discussed on page 4-14.
  • Page 66 Virtual Dolby Technologies Test DVD Track List...

  • Page 67: Streaming Server And Remote Software

    Using DolbyRemote 564 allows the DP564 to be located in another room or at some distance from the operator. While DolbyRemote 564 is in operation, the on the front panel of the DP564 is lit and access to the setup menu via the front-panel buttons is disabled.

  • Page 68: Launching The Application

    The PC network settings should reflect the DP564 network settings. DolbyRemote 564 can also be opened in Off Line mode to view the application without a hardware connection. Before you click OK to begin remote software operation of the DP564, on the DP564 front panel, press down while pressing ◄.) To disable remote operation and resume using the...

  • Page 69: Streaming

    Streaming Server program, the file selection window allows you to select a file to be played back via the streaming input. The DP564 only recognizes files that are stored in the directory defined when you install the Streaming Server program.

  • Page 70: 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.

  • Page 71: A.1 Metadata Overview

    Note: This appendix was originally written for users of Dolby 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.
  • Page 72 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.

  • Page 73: Figure A-1 Metadata Flow From Production To Consumer

    DP564 Multichannel Audio Decoder 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).

  • Page 74: A.2 Dialogue Level

    DP564 Multichannel Audio Decoder 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. Extended Bitstream Information parameters are in italics.
  • Page 75 DP564 Multichannel Audio Decoder 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.

  • Page 76: Dynamic Range Control

    DP564 Multichannel Audio Decoder 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.
  • Page 77 DP564 Multichannel Audio Decoder 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.

  • Page 78: Dynamic Range Control Profiles

    DP564 Multichannel Audio Decoder Dynamic Range Control Profiles 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.

  • Page 79: A.4 Downmixing

    DP564 Multichannel Audio Decoder 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)

  • Page 80: Table A-2 Outputs From Various Dolby Digital Signal Processing Equipment

    DP564 Multichannel Audio Decoder 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 Equipment 5.1-channel amplifier...

  • Page 81: A.5 Parameter Definitions

    DP564 Multichannel Audio Decoder 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.

  • Page 82: Universal Parameters

    DP564 Multichannel Audio Decoder 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.
  • Page 83 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.
  • Page 84 DP564 Multichannel Audio Decoder Bitstream Mode Setting CM flags the bitstream as the Main Audio Service for the program and all Complete Main elements are present to form a complete audio program. Currently, this is (CM) the most common setting. The CM Service may contain from one (mono) to six (5.1) channels.
  • Page 85 DP564 Multichannel Audio Decoder 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.
  • Page 86 DP564 Multichannel Audio Decoder Surround Downmix Level Setting 0.707 (–3 dB) default 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 5.1-channel amplifier) whether the two- channel encoded bitstream contains a Dolby Surround (Lt/Rt) program that requires Pro Logic decoding.
  • Page 87 DP564 Multichannel Audio Decoder 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.
  • Page 88 DP564 Multichannel Audio Decoder 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.

  • Page 89: Extended Bitstream Information Parameters

    A.5.2 Extended Bitstream Information Parameters In response to requests from content producers, Dolby Laboratories recently modified the definitions of several metadata parameters from their original definition as described in ATSC document A/52. The original parameters were rarely, if ever used.
  • Page 90 DP564 Multichannel Audio Decoder 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.
  • Page 91 DP564 Multichannel Audio Decoder 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. Lo/Ro Center Mix Level This parameter indicates the level shift applied to the center channel when adding to the left and right outputs when downmixing to a Lo/Ro output.
  • Page 92 DP564 Multichannel Audio Decoder 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.

  • Page 93: A.6 Metadata Combinations

    DP564 Multichannel Audio Decoder 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.
  • Page 94 DP564 Multichannel Audio Decoder Extended Bitstream Information parameters are in italics. Parameter Action Film Lo/Ro Center Downmix Level Lo/Ro Surround Downmix Level Dolby Surround Surround EX Mode A/D Converter Standard Type DC Filter Enable Lowpass Filter Enable LFE Lowpass Enable...

  • Page 95: Appendix B Latency Values

    The latency of the DP564 is defined as the difference in time between the beginning of a valid Dolby 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.

  • Page 96: Table B-1 Smpte-Specified Latency

    DP564 Multichannel Audio Decoder 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). Sample Rate IEC 61937 Specification (Consumer S/PDIF) Like the SMPTE professional specification, the IEC consumer specification also describes placement of the Dolby Digital frame on the S/PDIF interface such that a decoder with the specified latency will produce correctly timed audio.

  • Page 97: Table B-2 Iec 61937 Specified Latency, With Respect To Beginning Of Dolby Digital (Ac-3) Burst Payload

    In the Silent Switch mode, an additional latency is applied to an incoming PCM signal in order to detect bitstream type prior to decoding. This allows the DP564 to minimize any audio artifacts that may occur when switching between different bitstream types.
  • Page 98 Virtual Dolby Technologies Test DVD Track List...

  • Page 99: Appendix C Specifications

    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...
  • Page 100 DP564 Multichannel Audio Decoder Appendix C: Specifications Digital Audio Outputs Four BNC female connectors, unbalanced, 75 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 50 nominal; 1/4-inch standard stereo headphone jack;...
  • Page 101 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...

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