input is PCM.
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1C/2C
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1L/1R
1C/2C
1L/1R
1L/1R
1L/1R
1C/2C
1L/1R
1L/1R
1L/1R
1C/1LFE
1C/1LFE
1C/1S
1C/1S
1C/1S
1C/1S
3L/3R
3L/3R
3C/4C
4C/5C
3C/4C
1C/1LFE
1C/1S
1C/1S
3L/3R
3C/4C
4C/5C
3C/4C
1C/1S
None
None
3C/4C
1C/1LFE
1C/1LFE
1L/1R
1Ls/1Rs
1Ls/1Rs
2C/2S
3L/3R
3C/4C
4C/5C
4L/4R
4C/5C
5C/6C
6C/7C
5C/6C
1Ls/1Rs
None
None
None
None
None
5C/6C
None
None
None
None
1Ls/1Rs
1Ls/1Rs
1L/1R
2L/2R
2C/3C
2L/2R
2L/2R
2L/2R
2C/3C
2L/2R
2L/2R
2L/2R
2C/3C
7C/8C
None
2L/2R
2C/3C
2L/2R
2L/2R
2C/3C
None
None
2L/2R
2C/3C
None
1Bsl/1Bsr
1Le/1Re
1L/1R
Channel Activity Indications
Color Indication
Off Channel is disabled.
Yellow Channel is enabled; level <–60 dBFS.
Green Signal present above –60 dBFS.
Red Signal above –0.1 dBFS (clipping).
Flashing Yellow Required input missing.
Function LED Indications
Function Color Indication
Video Green Video reference is present and valid.
Ref Yellow Vref does not match Dolby E frame rate.
Red Video reference is missing or invalid.
Fault Off Normal operation; system OK.
Off Hardware-related fault.
Error Off No operational errors detected.
Red Operational errors; output may be invalid.
PCM Off No PCM signal detected.
Dly In Green Valid PCM signal present at input.
Yellow Non-48 kHz signal present. (DP572)
DP572 Operating Modes
Program Play
• Enabled: Allows users to decode a Dolby E stream off a VTR in
Program Play mode, up to ±10% varispeed. The source VTR must
support varispeed without sample rate conversion.
• Disabled: Normal playback mode; Main Input is locked to video
reference at 48 kHz. Latency is locked at one frame; if Dolby E audio is
delayed by up to 10 msec with respect to video, the decode latency is
reduced to correct for the delay to maintain one-frame system latency.
PCM Bypass
• Enabled: PCM audio on the Main Input passes through the unit and is
sent to all outputs. Allows clean audio transitions when the Main Input
signal switches from Dolby E to PCM.
• Disabled: Audio outputs are muted when non-Dolby E stream is present
at the Main Input. This is the recommended setting for editing Dolby E
audio on a VTR.
Bypass Latency
• 1 Frame: Maintains a one-frame delay on a PCM signal present at the
Main In connector to match the Dolby E decoding delay. Only valid if
PCM Bypass mode is enabled.
• Minimal: The PCM Bypass delay is the minimum necessary (<8 ms)
from Main In to PCM Out.
Program Configuration
In the DP571 Encoder, the selection you make under the Program
Configuration menu determines how the audio channels are
grouped within the Dolby
®
E bitstream. Up to eight input channels
may be grouped together in “programs,” where each program
contains its own metadata.
Examples:
5.1 + 2: one six-channel and one stereo program (two individual
programs)
2×2: two stereo programs (two individual programs)
2 + 6×1: one stereo and six mono programs (seven individual
programs)
4 + 2 + 2×1: one four-channel, one stereo, and two mono programs
(four individual programs)
DP571 Operating Modes
Reversion Mode
These four selections determine what happens when external
metadata is lost.
• Stop Encoding: Encoding stops, output mutes, error LED lights.
• Last Used: Encoding continues using the last valid external metadata
values received.
• Preset: Missing metadata values are replaced using the internal
metadata values as selected in Metadata Params.
• Adaptive: If metadata is completely lost, the encoder uses the Last
Used method. If only some parameters are missing, the encoder uses
the Preset method.
Metadata Source
These two options determine the source of the metadata.
• Internal: Uses internal metadata values as selected in Metadata
Params.
• External: Metadata is supplied by the external source, and may not be
modified locally.
Dolby Digital Metadata
A home decoder uses Dolby Digital metadata to optimize the audio
program for the local listening environment. It controls replay level,
dynamic range, and downmixing. Dolby Digital metadata is also
used when monitoring in the station or during transmission to the
home.
• Enabled: Default setting; includes Dolby Digital metadata.
• Disabled: The Dolby E stream does not include Dolby Digital metadata;
useful only if the decoded bitstream will never be re-encoded as Dolby
Digital audio.
Bit Depth
This setting refers to the number of bits used in the digital audio
output to carry the Dolby E data stream. This should be configured
to match the bit depth available on the recording device or within
the facility. 20-bit allows for eight channels of audio and metadata,
16-bit for six channels of audio and metadata. This setting does not
refer to the number of bits of resolution of the audio signals carried
within the Dolby E stream.
Metadata (DP571 and DP572)
DP571: The Dolby E output includes metadata, which may be set
internally through the front-panel menus or taken from an external
metadata stream connected to the rear panel.
DP572: When decoding Dolby E, the metadata included in the
stream is sent to the rear-panel metadata port. When in Bypass or
Switched Out modes, metadata may also be sent to this port
(enabled via the Bypass Metadata menu) from an internal set of
parameters configured in the PCM Metadata menus. This allows
simple, local generation of metadata appropriate for the PCM audio
signal. The metadata is also used to control the transmission Dolby
Digital encoder and is often used to switch automatically between
5.1 and stereo programming or main and back-up feeds.
DP571/DP572 Dolby E Professional Encoder/Decoder Quick Start Guide
www.dolby.com
DP572 Switched Out Mode
DP572 Decoding and PCM Bypass
5.1 + 2
5.1 + 2×1
4 + 4
4 + 2×2
4 + 2 + 2×1
4 + 4×1
4×2
3×2 + 2×1
2×2 + 4×1
2 + 6×1
8×1
5.1
4 + 2
4 + 2×1
3×2
2×2 + 2×1
2 + 4×1
6×1
4
2 + 2
2 + 2×1
4×1
7.1
7.1 Screen
PCM Bypass
Input/Output Channel Assignments
The program number (1–8) identifies the channels associated with
individual programs in this chart.
Program Connector Channel Map
Config 1/2 3/4 5/6 7/8
Main Input Carries PCM:
Dolby and the double-D symbol are registered trademarks of Dolby Laboratories.
All other trademarks remain the property of their respective owners.
© 2003 Dolby Laboratories, Inc. All rights reserved. S03/14766 Part Number 91820
Video Reference (DP571 and
DP572)
The DP571 and DP572 both need a video reference: to align the
individual frames of data in the Dolby E bitstream and to generate
the output audio clock and align the metadata output, respectively.
In the DP571, you must manually configure the Frame Rate menu
to match the current video reference frame rate, whereas the
DP572 auto-detects the frame rate (see Function LED Indications).
To operate at 25 or 29.97 fps, a standard analog video reference is
required. To operate using a tri-level video reference at 23.98, 24,
or 30 fps, the DP571 and DP572 require the DP579 Tri-Level Sync
Interface.
DP572 Output Routing Modes
The DP572 Dolby E Decoder offers five routing modes to assist
with integration into existing digital audio paths. All five modes can
be selected from the PCM Ch Config menu; Voiceover and
Switched Out modes can also be selected through the rear-panel
Status Port.
Voiceover Mode: Mixes the PCM signal present at the PCM In
connector with the audio in Program 1 of the Dolby E stream.
The attenuation of the decoded Dolby E content can be
adjusted using the Voiceover Attn menu, and the incoming
PCM voiceover signal can be routed to either the Center or
Left and Right channels by selecting either Mono or Stereo
from the Voiceover Ch menu.
Switched Out Mode: Replaces Program 1 of the decoded Dolby E
audio with the signal present at the PCM In connector. Audio
present at the PCM Input connector is routed to output
channels 1 and 2, while all other outputs relevant to Program 1
are muted.
Auto Switched Out Mode: Provides an automatic, smooth
transition between material decoded with Dolby E technology
and a “Switched Out” condition when the Main Input to the
DP572 switches from Dolby E to PCM.
Delay Out Mode: Allows a two-channel PCM signal present at the
PCM In connector to stay in sync with the decoding latency of
the Dolby E audio. In this mode, the PCM Delay Output
connector is active. You can optionally place an internal sample
rate converter in the path of the PCM Input signal.
External Ctrl: Instructs the DP572 to look for routing commands
from the rear-panel Status Port.
Tip: The Switched Out mode menu controls the DP572 audio and
metadata outputs if the Main Input signal disappears and the
unit is set to Switched Out (or Auto Switched Out) mode. If set
to Mute, both audio and metadata outputs are silent; if set to
Active, Switched Out mode operates normally.
Normal Dolby E Decoding:
To Next Page
Need help?
General
