Dolby E Model DP571 Encoder Model DP572 Decoder Multichannel Distribution System User Manual Issue 3 Version 1.05 Part No.
Dolby Laboratories Inc www.dolby.com United States 100 Potrero Avenue San Francisco, CA 94103-4813 Telephone 415-558-0200 Facsimile 415-863-1373 United Kingdom Wootton Bassett Wiltshire SN4 8QJ England Telephone (44) 1793-842100 Facsimile (44) 1793-842101 WARNING: Troubleshooting must be performed by trained technicians. Do not attempt to service this equipment unless you are qualified to do so.
Table of Contents List of Figures ...................................................................................................................... vii List of Tables ....................................................................................................................... viii Preface Regulatory Notices ...................................................................................ix Chapter 1 Introduction ............................................................................
Chapter 3 Chapter 4 DP571 Dolby E Encoder...................................................................... 3-1 3.1 Hardware Reference ................................................................................ 3-1 3.1.1 Digital Inputs ............................................................................... 3-3 3.1.2 Video Reference........................................................................... 3-3 3.1.3 LTC Input................................................................
Chapter 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.
List of Figures 1-1 Checking the main fuse .................................................................................................. 1-4 1-2 Connection between a DP569 and DP572 ...................................................................... 1-6 1-3 DP571 and DP572 front-panel controls and LEDs ......................................................... 1-8 2-1 Typical Dolby E system in a postproduction facility .....................................................
List of Tables 1-1 LEDs common to the DP571 and DP572 .................................................................... 1-11 1-2 LEDs unique to the DP571 and DP572 ....................................................................... 1-11 1-3 Channel Activity LEDs for the DP571 and DP572 ..................................................... 1-12 1-4 RS-485 Termination jumper settings ...........................................................................
Dolby E Multichannel Distribution System User Manual Preface Regulatory Notices 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.
Dolby E Multichannel Distribution System User Manual Regulatory Notices UK 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.
Dolby E Multichannel Distribution System User Manual Important Safety Notice Regulatory Notices GB 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: • • • • • If the unit has a voltage selector, ensure that it is set to the correct mains voltage for your supply. If there is no voltage selector, ensure that your supply is in the correct range for the input requirement of the unit.
Dolby E Multichannel Distribution System User Manual Regulatory Notices E 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: • • • • • Asegúrese que el selector de tensión esté ajustado a la tensión correcta para su alimentación.
Dolby E Multichannel Distribution System User Manual Chapter 1 Introduction The Dolby E multichannel distribution system is the first technology that can transport multichannel audio within the digital broadcast industry’s current two-channel infrastructure. A single Dolby E bitstream can carry up to eight discrete audio channels, each with its associated Dolby Digital metadata, in a 16- or 20-bit, 48 kHz AES pair.
Dolby E Multichannel Distribution System User Manual Introduction The rest of this chapter presents important introductory information: • Section 1.1 - Unpacking and Inspection • Discusses how to unpack, inspect, and check the fuses for both units. Section 1.2 - System Considerations • Discusses Dolby E’s digital I/O, connector types, and signal characteristics. Section 1.
Dolby E Multichannel Distribution System User Manual 1.1 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: • Rack screws and washers • Power cord • BNC 75Ω terminators, used on Digital and Video Ref inputs (Part No. 79114) • Spare fuse 1 A (Part. No.
Dolby E Multichannel Distribution System User Manual Open the door Introduction Metal clip installed on unused side of carrier rrier ca Fuse Active fuse Top 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.
Dolby E Multichannel Distribution System User Manual 1.2 System Considerations 1.2.1 Digital I/O Introduction 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 impedance called AES3-1995.
Dolby E Multichannel Distribution System User Manual 1.3 Introduction 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.
Dolby E Multichannel Distribution System User Manual 1.4 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.
Model DP572 Dolby E Decoder Model DP571 Dolby E Encoder Dolby E 5.1+2 Dolby E 5.1+2 20bit 20bit 1-8 Shift Remote Shift Remote Contrast Delete Contrast Delete Enter Insert Enter Insert Esc Setup Status Esc Setup Status Other 6x1 8x1 3x2 PCM 4x2 5.1+2 x 1 Other 6x1 8x1 20 bit 24 bit 3x2 5.1 5.1 + 2 16 bit Dolby E Program Config 4x2 Input Data 5.1+2 x 1 24 bit 5.1 + 2 5.
Dolby E Multichannel Distribution System User Manual 1.4.1 Introduction Menu Selection and Push-button Operation The DP571 and DP572 share an almost identical push-button user interface. ↓ → Keys Both keys advance to the next menu or parameter value. When editing a text field, → moves to the next letter in the name; ↓ changes the value of the current character to the next alphanumeric character. ↑ ← Keys Both keys return to the previous menu or parameter value.
Dolby E Multichannel Distribution System User Manual 1.4.2 Introduction Display The display is a 2-line by 16-character alphanumeric display with green LED backlighting. The contrast can be adjusted by pressing Shift + ↓. Use the arrows to set the contrast. 1.4.3 • During normal Dolby E encoding, the DP571 displays the Program Config, frame rate, and the output data width.
Dolby E Multichannel Distribution System User Manual Introduction Fault, Remote, PCM Dly, Error, and VRef Table 1-1 LEDs common to the DP571 and DP572 Name Function Fault Red: Off: Hardware related fault condition No fault condition Remote Green: Remote mode enabled with no communication errors Red: Remote mode enabled but communication error detected Off: Remote mode not enabled PCM Delay Green: Valid PCM signal Yellow: Non-48 kHz signal Off: No PCM signal Error Red: Off: VRef Green: Lock wi
Dolby E Multichannel Distribution System User Manual Introduction The following LED color codes describe the same channel activity for both units: Table 1-3 Channel Activity LEDs for the DP571 and DP572 Name 1.4.4 Function Yellow Channel enabled; level < -60 dBFS Green Channel enabled; -60 ≤ level < -0.1 dBFS Red Channel enabled; level ≥ -0.
Dolby E Multichannel Distribution System User Manual 1.5 Introduction Quickstart Guide for the DP571 and DP572 This section supplies necessary information to allow immediate encoding and decoding. 1. 2. Since neither unit will function without a video reference signal, we recommend making this connection first. Connect the digital audio inputs to the DP571. 3. These are AES3-ID inputs (unbalanced, 75Ω, 1 V peak-to-peak standard output), and are very similar to analog composite video.
Dolby E Multichannel Distribution System User Manual 9. Introduction 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. Press the ↓ key until Operating Mode: Metadata Revert is displayed, then press Enter. Use the ↓ ↑ keys to select Metadata Revert: Last Used and press Enter.
Dolby E Multichannel Distribution System User Manual 1.6 Introduction 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. 1.6.1 PCM Delay Channel The encoder and decoder each impart an audio delay equal to one video frame.
Dolby E Multichannel Distribution System User Manual 1.7 Introduction Configuring Jumper Settings Although the DP571 encoder and DP572 decoder will function correctly with no internal adjustments, five jumpers provide additional termination options. Any necessary changes to the jumpers should be made before the units are installed. There are 124 Ω terminations on both units for the RS-485 Metadata and Remote control ports. The units ship with these terminations bypassed (pins 3 and 4).
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. 2.1 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.
Dolby E Multichannel Distribution System User Manual 2.2 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. 2.
Dolby E Multichannel Distribution System User Manual 2.6 Common Dolby E Applications Postproduction Figure 2-1 shows a typical postproduction configuration using Dolby E. The same 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.
Dolby E Multichannel Distribution System User Manual Chapter 3 DP571 Dolby E Encoder 3.1 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 • Figure 3-2 – DP571 front and rear panels VREF Synchron. HSYNC Frequency Lock Module VSYNC Video Reference TC Receiver LTC Input AES3 Receiver Sample Rate Converter AES3 Receiver Sample Rate Converter Input Chan.
3-2 Metadata Remote Auxiliary Status Model DP571 10BASE-T Dolby E Encoder PCM Delay Dolby E 5.1+2 Out In Main Out 20bit Video Ref Contrast Delete Enter Insert Esc Setup Status LTC In Figure 3-2 DP571 front and back panel Model DP571 Dolby E Encoder Dolby Laboratories Inc. San Francisco and U.K. Made in U.S.A.
Dolby E Multichannel Distribution System User Manual 3.1.1 DP571 Dolby E Encoder Digital Inputs A maximum of eight PCM channels can be sent to the Digital Inputs, each with a loopthrough connection. 3.1.2 Video Reference An analog composite video reference signal is required for Dolby E encoding. Versions 1.05 and later support two frame rates: 29.97 Hz (NTSC) and 25 Hz (PAL). VITC information can also be extracted from the video reference signal.
Dolby E Multichannel Distribution System User Manual 3.1.7 DP571 Dolby E Encoder Main Out The encoded Dolby E bitstream is output from the rear-panel Main Out connector as an AES3 coaxial digital signal. Two connectors are available for transmission of Dolby E data to multiple decoders or monitoring units. Note: The two Main outputs are electrically separate, not passive loop-through connections, so there is no need to terminate an unused output. 3.1.
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 1 None or low-to-high High-to-low 2 High-to-low High-to-low 3 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.
Dolby E Multichannel Distribution System User Manual 3.2 DP571 Dolby E Encoder DP571 Setup Mode Menu Reference DP571 Unit Setup Program Config DP571 Unit Setup Operating Mode DP571 Unit Setup Metadata Params DP571 Unit Setup Presets DP571 Unit Setup System Settings DP571 Unit Setup 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.
Dolby E Multichannel Distribution System User Manual 3.2.1 Program Config Enter DP571 Unit Setup Program Config Esc Program Config 5.1 + 2 x 1 Program Config 5.1 + 2 Program Config 4x1 Program Config 2+2x1 Program Config 2+2 Program Config 4 Program Config 6x1 Program Config 2+4x1 Program Config 2x2+2x1 Program Config 3x2 Program Config 4+2x1 Program Config 4+2 Program Config 5.
Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Table 3-4 DP571 Program Configurations Program Config Program and Channel Explanation 5.1 + 2 x 1 One 5.1-channel and two mono programs. May be used for a 5.1-channel and two mono SAPs. 5.1 + 2 One 5.1-channel and one stereo program. One of the most common configs. Two channel could be stereo, Dolby Surround (Lt/Rt), or even stereo SAP.
Dolby E Multichannel Distribution System User Manual 3.2.
Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Metadata Source Internal: Assigns factory default metadata values based on each Program within a Program Config; these values can still be modified (see Section 3.2.4 - Metadata Params). Ext Override: Allows local modification of the external source’s metadata values. External: Uses the external source’s Metadata without permitting local modification.
Dolby E Multichannel Distribution System User Manual 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. The DP572 automatically responds to the encoded input signal’s bit depth and inaudibly switches to decode the correct Dolby E stream.
Dolby E Multichannel Distribution System User Manual 3.2.3 DP571 Dolby E Encoder Presets Enter DP571 Unit Setup Presets Presets Save Preset Enter Up/Down arrow keys select presets 1-8. Presets Recall Preset Enter Esc Recall Preset 01 Preset 1 Save Preset 1 Enter Left/right arrow keys move to next letter in preset name. Up/Down arrow keys select letters and numbers. Esc Esc Arrow keys select presets 1-8. Names assigned in Save Preset appear to the right of the number.
Dolby E Multichannel Distribution System User Manual 3.2.4 DP571 Dolby E Encoder Metadata Params The Metadata Params affect Dolby Digital decoding, not Dolby E encoding or decoding. Enter Metadata Params Esc Program 1 Program 1 Channel Mode Program 1 Bitstream Mode Enter Esc Enter Esc Program 1 Center Dwnmx Lev Enter Esc Bitstream Mode Main Complete Bitstream Mode Assc Voice Over Channel Mode 2/0 Stereo Channel Mode 1/0 Mono Center Dwnmx Lev 0.707 (-3.
Dolby E Multichannel Distribution System User Manual DP571 Dolby E Encoder Reversion Preset Metadata Params Program 1-N Metadata Params Reversion Preset Enter Esc Reversion Preset Program Config Enter Esc 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. See Metadata Revert on page 9 for more information on this feature.
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 5.1channel Dolby Digital decoder. Not Dolby Srnd: Indicates to the decoder that a two-channel signal is not a Dolby Surround Pro Logic (Lt/Rt) program. Not Indicated: Indicates to the decoder that a two-channel signal may or may not be a Dolby Surround (Lt/Rt) program.
Dolby E Multichannel Distribution System User Manual 3.2.5 DP571 Dolby E Encoder System Settings Enter DP571 Unit Setup System Settings System Settings Remote Baud Rate Enter Esc System Settings Unit Address Enter Esc System Settings Unit Name Enter Esc Unit Name Dolby E Encoder Unit Address 8280 Remote Baud Rate 9.6 kbps Esc Remote Baud Rate 38.4 kbps Remote Baud Rate 19.
Dolby E Multichannel Distribution System User Manual Chapter 4 DP572 Dolby E Decoder 4.1 Hardware Reference This section discusses the DP572 hardware connectors.
4-2 Metadata Remote Auxiliary Status Model DP572 10BASE-T Dolby E Decoder PCM Dolby E 5.1+2 Dly Out In Main In 20bit Video Ref Shift Contrast Delete Enter Insert Esc Setup Status LTC Out Model DP572 Dolby E Decoder Dolby Laboratories Inc. San Francisco and U.K. Made in U.S.A. S/N XXXXX Ch 1/2 PCM 24 bit 20 bit 16 bit Input Data Dolby and the double-D symbol are trademarks of Dolby Laboratories Inc.
Dolby E Multichannel Distribution System User Manual 4.1.1 DP572 Dolby E Decoder 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. The DP572 automatically detects whether the Main In signal is Dolby E or PCM. 4.1.2 Video Reference An analog composite video reference signal is required for Dolby E decoding. Versions 1.
Dolby E Multichannel Distribution System User Manual 4.1.8 DP572 Dolby E Decoder 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.
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. A low-to-high transition (i.e., a switch release) restores the External Standby setting. Table 4-2 shows the function of the two GPI pins on the DP572. Table 4-2 Status port output routing mode selection 4.1.
Dolby E Multichannel Distribution System User Manual 4.2 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.
Dolby E Multichannel Distribution System User Manual 4.2.
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. 4.2.
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. Voiceover Atten Applies 0 to -31 dB attenuation to the main Dolby E program. At 0 dB attenuation, overload can occur if the main Dolby E program and Voiceover audio both reach 0 dBFS.
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 Enter Headphone Map L=L R=R DP572 Unit Setup Headphone Map Headphone Map L=Ls R=Rs Esc Headphone Map L=LFE R=LFE Headphone Map L=C R=C The mappings above are for a 5.
Dolby E Multichannel Distribution System User Manual 4.2.6 DP572 Dolby E Decoder Firmware Upgrade DP572 Unit Setup Firmware Upgrade Enter Esc 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 documentation that accompanies the upgrade kit. 4.3 DP572 Status Mode Menu Access the Status mode menus by pressing Shift + Setup.
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 > 110 dB Sampling Rate 48 kHz Video Frame Rate 29.97 Hz (NTSC); 25 Hz (PAL) Encoding Delay 1 video frame (fixed) Output Data Width 20-bit (8 channels); 16-bit (6 channels) Dolby E Configurations User Selectable: 5.1/5.1+2/5.
