Dolby Laboratories DP571 User Manual
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Dolby Laboratories DP571 User Manual

Dolby Laboratories DP571 User Manual

Multichannel distribution system
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Dolby E
Model DP571 Encoder
Model DP572 Decoder
Multichannel Distribution System
User Manual
Issue 3
Version 1.05
Part No. 91685

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Summary of Contents for Dolby Laboratories DP571

  • Page 1 Dolby E Model DP571 Encoder Model DP572 Decoder Multichannel Distribution System User Manual Issue 3 Version 1.05 Part No. 91685...
  • Page 2 (including but not limited to damage to software or recorded audio or visual mate- rial), or loss of use, revenue or profit even if Dolby Laboratories or its agents have been advised, orally or in writing, of the possibility of such damages.

  • Page 3: Table Of Contents

    1.4.2 Display ..................1-10 1.4.3 Display LEDs................1-10 1.4.4 Remote ..................1-12 1.5 Quickstart Guide for the DP571 and DP572 ......... 1-13 1.6 Common Features of the DP571 and DP572......... 1-15 1.6.1 PCM Delay Channel ..............1-15 1.6.2 Metadata..................1-15 1.6.3 Timecode..................
  • Page 4 3.1.8 PCM Delay Out................3-4 3.1.9 Status.................... 3-4 3.1.10 Auxiliary ..................3-5 3.1.11 10BASE-T..................3-5 3.2 DP571 Setup Mode Menu Reference ............3-6 3.2.1 Program Config................3-7 3.2.2 Operating Mode ................3-9 3.2.3 Presets ..................3-12 3.2.4 Metadata Params................ 3-13 3.2.5 System Settings................
  • Page 5 4.2 DP572 Setup Mode Menu Reference ............4-6 4.2.1 Operating Mode ................4-7 4.2.2 PCM Chan Config................ 4-8 4.2.3 Headphone Prog................4-9 4.2.4 Headphone Map ................. 4-10 4.2.5 System Settings................4-10 4.2.6 Firmware Upgrade ..............4-11 4.3 DP572 Status Mode Menu..............4-11 Chapter 5 System Specifications .................

  • Page 7: List Of Figures

    List of Figures Checking the main fuse ....................1-4 Connection between a DP569 and DP572 ..............1-6 DP571 and DP572 front-panel controls and LEDs ............1-8 Typical Dolby E system in a postproduction facility ............. 2-3 DP571 Block Diagram ....................3-1 DP571 front and back panel ...................

  • Page 8: List Of Tables

    LEDs common to the DP571 and DP572 ..............1-11 LEDs unique to the DP571 and DP572 ............... 1-11 Channel Activity LEDs for the DP571 and DP572 ............. 1-12 RS-485 Termination jumper settings ................1-16 DP571 Status port pin functions ..................3-4 Status port preset selection ....................

  • Page 9: Preface Regulatory Notices

    Dolby E Multichannel Distribution System User Manual Preface Regulatory Notices 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.
  • Page 10 Dolby E Multichannel Distribution System User Manual Regulatory Notices As the colours of the cores in the mains lead may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: • The core which is coloured green and yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol or coloured green or green and yellow.
  • Page 11 Dolby E Multichannel Distribution System User Manual Regulatory Notices Important Safety Notice This unit complies with the safety standard IEC65. To ensure safe operation and to guard against potential shock hazard or risk of fire, the following must be observed: •...
  • Page 12 Dolby E Multichannel Distribution System User Manual Regulatory Notices Aviso Importante De Seguridad Esta unidad cumple con la norma de seguridad IEC65. Para asegurarse un funcionamiento seguro y prevenir cualquier posible peligro de descarga o riesgo de incendio, se han de observar las siguientes precauciones: •...

  • Page 13: Chapter 1 Introduction

    Even experienced studio engineers must learn new techniques and terminology to begin using these Dolby E devices. Fortunately, Dolby Laboratories has greatly simplified the process of getting started: •...
  • Page 14 Each application type strongly suggests a program configuration which, in turn, almost entirely configures both devices. • Chapter 3 – DP571 Dolby E Encoder and Chapter 4 – DP572 Dolby E Decoder Supplies detailed hardware and menu reference information about each device. •...

  • Page 15: Unpacking And Inspection

    Dolby E Multichannel Distribution System User Manual Introduction Unpacking and Inspection Before unpacking the unit, inspect the outer carton for shipping damage. If the carton shows damage, inspect the unit in those areas. Several accessories are provided with the unit. These may include: •...

  • Page 16: Checking The Main Fuse

    Dolby E Multichannel Distribution System User Manual Introduction Metal clip installed on unused side of carrier Open the door Active fuse Install fuse Figure 1-1 Checking the main fuse Internal Fuse The switching power supply contains a separate fuse. Most fault conditions should be protected by the main fuse.

  • Page 17: System Considerations

    1.2.1 Digital I/O The digital input and output connections on the DP571 encoder and DP572 decoder may seem unfamiliar to the first time user of a digital audio device. The Audio Engineering Society (AES) created a standard electrical interface for digital audio with a balanced XLR connector and 110Ω...

  • Page 18: Connection With The Dp569 Multichannel Encoder

    One of Dolby E’s most important features is its ability to carry Dolby Digital metadata. The DP571 can receive metadata from an external device, such as a metadata authoring tool, or it can generate metadata internally. The DP572 decodes the Dolby E signal, extracts the metadata and sends it to the DP569 Dolby Digital encoder.

  • Page 19: Front-Panel User Interface

    Dolby E Multichannel Distribution System User Manual Introduction Front-Panel User Interface The DP571 and DP572 employ the same user interface to access menus and display status information. This section introduces the interface, controls, and display features (see Figure 1-3). Conventions The + symbol will be used to notate key sequences not simultaneous key combinations.

  • Page 20: Dp571 And Dp572 Front-Panel Controls And Leds

    Dolby E Multichannel Distribution System User Manual Introduction Figure 1-3 DP571 and DP572 front-panel controls and LEDs...

  • Page 21: Menu Selection And Push-Button Operation

    Press Shift + Setup to enter Status mode to query the device status; values can be viewed but not set in this mode. See Section 3.3 - DP571 Status Mode Menu and Section 4.3 - DP572 Status Mode Menu to view the Status mode menus.

  • Page 22: Display

    Display LEDs Output/Input Data The DP571 displays the Output Data width. At version 1.05, only the 16- and 20-bit set- tings are valid. The DP572 displays the Input Data width for the incoming Dolby E stream. Note: A 24-bit version will be available in the future.

  • Page 23: Leds Common To The Dp571 And Dp572

    Yellow: Non-48 kHz input or AES3 error condition Input/Output Channel Activity The DP571 Input Channel Activity LEDs display the number of channels in the currently selected program configuration. The DP572 Output Channel Activity LEDs display the number of active output channels.

  • Page 24: Remote

    ≥ -0.1 Channel enabled; level dBFS Channel disabled Flashing Yellow Channel sample frequency out of range (DP571 only) 1.4.4 Remote Future versions of the DP571 and DP572 will allow remote control operation. The front-panel Remote port is an RS-232 connector. 1-12...

  • Page 25: Quickstart Guide For The Dp571 And Dp572

    NTSC or PAL reference signal (black burst) is applied to both units and that they are properly terminated. The DP571 shows the current encoding Program Config. Set it to 5.1 + 2 by pressing Setup + Enter when the display shows DP571 Unit Setup: Program Config.
  • Page 26 Verify that the Metadata Revert and Source parameters are in the correct mode. Press Esc until DP571 Unit Setup: Program Config is displayed again (home in the setup menu structure). Press the ↓ ↓ ↓ ↓ key until DP571 Unit Setup: Operating Mode is displayed, then press Enter.

  • Page 27: Common Features Of The Dp571 And Dp572

    Common Features of the DP571 and DP572 This section discusses the most important common features between the encoder and decoder. See Chapter 3 – DP571 Dolby E Encoder and Chapter 4 – DP572 Dolby E Decoder for complete references for both units.

  • Page 28: Configuring Jumper Settings

    As with video, the termination should occur only at the destination of the signal (i.e., on the inputs to a device). For the DP571, the loop-through BNC connectors for the inputs must have terminators if they are not being used to feed other equipment.

  • Page 29: Chapter 2 Common Dolby E Applications

    Dolby E Multichannel Distribution System User Manual Chapter 2 Common Dolby E Applications This section presents six common broadcast audio applications with configuration instructions for the Dolby E encoder and decoder. With minor modifications to these application settings, most common variations can be easily accommodated. Film The two most common types of major motion picture sound formats are two-channel Dolby Stereo (compatible with Dolby Surround), and 5.1-channel Dolby Digital.

  • Page 30: Commercial And Interstitial

    Dolby E Multichannel Distribution System User Manual Common Dolby E Applications Commercial and Interstitial Although current commercial and interstitial material is primarily two-channel stereo, this fast-growing broadcasting sector will almost certainly catch up to film practice, thereby ensuring smooth transitions between commercial and feature programs. See Section 2.1 - Film for the settings to use for two- and 5.1-channel material.

  • Page 31: Postproduction

    VRef black burst signal locks all units; an LTC signal slave-locks a digital multitrack recorder to a digital VTR. The LTC signal is also sent to the DP571 LTC Input via the loop-through connector on the multitrack. The DP571 and VTR have the same time code signal to resynchronize the video and audio if they are separated.

  • Page 33: Chapter 3 Dp571 Dolby E Encoder

    Dolby E Multichannel Distribution System User Manual Chapter 3 DP571 Dolby E Encoder Hardware Reference This section discusses the DP571 hardware connectors. Refer to the following diagrams while reading this chapter: • Figure 3-1 – block diagram of the DP571 •...

  • Page 34: Dp571 Front And Back Panel

    Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Figure 3-2 DP571 front and back panel...

  • Page 35: Digital Inputs

    VRef LED will be red (Vref not present) or yellow (Vref unequal to frame rate of Dolby E Main Output). 3.1.3 LTC Input The DP571 accepts a SMPTE LTC signal. After decoding in the LTC receiver, the resulting time code information is passed to the DSP subsystem. 3.1.4 PCM Delay Input When sending both encoded and non-encoded channel pairs to a digital recorder, the non-encoded pair must be delayed to remain synchronized with the encoded signal.

  • Page 36: Main Out

    The two inputs on pins 7 and 8 select among the first three (of eight) presets stored in the DP571. The inputs are normally high (internal pull-up) and trigger a preset recall by sensing a momentary high-to-low transition. A momentary contact closure between pins 7 and 9 (ground) or pins 8 and 9 is sufficient to activate a function but a held closure also works.

  • Page 37: Auxiliary

    Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Table 3-2 Status port preset selection Pin 7 Transition Pin 8 Transition Preset High-to-low None or low-to-high None or low-to-high High-to-low High-to-low High-to-low Presets 1 – 3 also generate corresponding outputs on the Status port that can be used to indicate selection of a preset via the Status port, Serial Remote port (future), or the front panel.

  • Page 38: Dp571 Setup Mode Menu Reference

    System Settings Firmware Upgrade Figure 3-3 DP571 Unit Setup menus This is the top level of the DP571 menu hierarchy for editable parameters. Each menu is discussed in its own section and displayed with all submenus and values. Conventions In the menu diagrams, the arrow keys select among menus at the same hierarchical level and settings within a menu category.

  • Page 39: Program Config

    Dolby E Multichannel Distribution System User Manual 3.2.1 Program Config DP571 Unit Setup Enter Program Config Program Config Program Config Program Config Program Config 5.1 + 2 x 1 5.1 + 2 4 x 1 2 + 2 x 1...

  • Page 40: Dp571 Program Configurations

    Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Table 3-4 DP571 Program Configurations Program Program and Channel Explanation Config One 5.1-channel and two mono programs. May be used for a 5.1 + 2 x 1 5.1-channel and two mono SAPs.

  • Page 41: Operating Mode

    Metadata Revert Preset Figure 3-5 Operating Mode menu Time Code Input This parameter controls where the DP571 derives its time code information. LTC: LTC In connector supplies time code. VITC: Vertical Interval Time Code is derived from the Video Ref In connector.
  • Page 42 Disable: Default value appropriate for most common VTRs. Enable: Allows a DP571 encoder to be used with a 30 Hz VTR operating at 29.97 Hz. The < in the display below reflects that 48 kHz Pull Down is enabled. Dolby E <...
  • Page 43 DP571 Dolby E Encoder Bit Depth Version 1.05 and later of the DP571/572 can encode/decode both 16- and 20-bit Dolby E bitstreams. Versions prior to 1.05 offer only 20-bit operation and future versions will offer 24-bit operation. The 16-bit feature allows Dolby E to be used with 16-bit recording devices.

  • Page 44: Presets

    ENTER=Yes ESC=No Figure 3-6 Presets menu A Preset represents all settings and values in the DP571. Presets are useful when an en- coding task requires manual parameter setting beyond selecting a Program Config. Rather than repeating the steps for each encoding session, save the proper settings as a named Preset that can be recalled when needed.

  • Page 45: Metadata Params

    Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder 3.2.4 Metadata Params The Metadata Params affect Dolby Digital decoding, not Dolby E encoding or decoding. Enter Metadata Params Program 1 Program 1 Program 1 Program 1 Bitstream Mode...

  • Page 46: Reversion Preset Menu

    Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Reversion Preset Metadata Params Metadata Params Program 1-N Reversion Preset Enter Reversion Preset Program Config Enter See the Program Config section for possible settings. Figure 3-8 Reversion Preset menu Reversion Preset specifies a Program Config to use in case an external metadata source is interrupted.
  • Page 47 Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Dolby Srnd Mode Dolby Srnd: Indicates to the decoder that a two-channel signal is a Dolby Surround (Lt/Rt) program. Can activate Dolby Pro Logic decoding in a 5.1- channel Dolby Digital decoder.

  • Page 48: System Settings

    Firmware Upgrade ENTER=Yes ESC=No Figure 3-10 Firmware Upgrade menu The firmware in the DP571 can be upgraded via the Remote Serial port. See the docu- mentation that accompanies the upgrade kit. DP571 Status Mode Menu Access the Status mode menus by pressing Shift + Setup. These menus simply display the device’s current status and are not used to set values.

  • Page 49: Chapter 4 Dp572 Dolby E Decoder

    Dolby E Multichannel Distribution System User Manual Chapter 4 DP572 Dolby E Decoder Hardware Reference This section discusses the DP572 hardware connectors. Refer to the following diagrams while reading this chapter: • Figure 4-1 – block diagram of the DP572 •...
  • Page 50 Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder Figure 4-2 DP572 front and rear panels...

  • Page 51: Main In

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder 4.1.1 Main In A Dolby E encoded signal is applied to Main In, sent to an AES3 receiver, then passed to the DSP subsystem for decoding. A PCM signal can also be input to Main In and passed directly to Digital Outputs 1/2.

  • Page 52: Status

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder 4.1.8 Status General Purpose Input/Output (GPI/O) signals for the DP572 are available from the Status port, a female DB-9 connector. The input and output signals are 0 – 5 V TTL. Table 4-1 defines the pin configuration.

  • Page 53: Digital Outputs

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder The state of the pins is normally high (internal pull up), and they detect a high-to-low transition. A held contact closure between pins 7 and 9 (ground) or pins 8 and 9 is required to activate a function.

  • Page 54: Dp572 Setup Mode Menu Reference

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder DP572 Setup Mode Menu Reference This is the top level of the DP572 menu hierarchy for editable parameters. Each menu is discussed in its own section and displayed with all submenus and values. DP572 Unit Setup DP572 Unit Setup DP572 Unit Setup...

  • Page 55: Operating Mode

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder 4.2.1 Operating Mode DP572 Unit Setup Enter Operating Mode Operating Mode Operating Mode Operating Mode Operating Mode Operating Mode Program Play 48kHz Pull Down PCM Bypass Bypass Metadata Bypass Latency Enter Enter...

  • Page 56: Pcm Chan Config

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder Bypass Latency This feature is only relevant if PCM Bypass mode is enabled. 1 Frame: Maintains a one-frame delay. Minimal: The PCM Bypass audio undergoes the minimum propagation delay from Main In to PCM Out.

  • Page 57: Headphone Prog

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder Voiceover Mode Selects Mono or Stereo for Voiceover PCM input. Mono adds PCM Input Channels 1 and 2 and attenuates 6 dB. Note: Voiceover and Switched Out modes can be selected via the Status port. See Section 4.1.8 - Status.

  • Page 58: Headphone Map

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder PCM Delay Selects the PCM Input channel for headphone monitoring. 4.2.4 Headphone Map DP572 Unit Setup Enter Headphone Map Headphone Map Headphone Map Headphone Map Headphone Map L=LFE R=LFE L=L R=R L=Ls R=Rs L=C R=C...

  • Page 59: Firmware Upgrade

    Dolby E Multichannel Distribution System User Manual DP572 Dolby E Decoder 4.2.6 Firmware Upgrade DP572 Unit Setup Firmware Upgrade Enter Firmware Upgrade ENTER=Yes ESC=No Figure 4-9 Firmware Upgrade menu The firmware in the DP572 can be upgraded via the Remote Serial port. See the docu- mentation that accompanies the upgrade kit.

  • Page 61: Chapter 5 System Specifications

    Dolby E Multichannel Distribution System User Manual Chapter 5 System Specifications Audio Encoding Method Dolby E Frequency Response 20 Hz – 20 kHz ±0.25 dB Distortion < 0.01% at 1 kHz; < 0.02%, 20 Hz – 20 kHz Dynamic Range >...

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