Dolby Laboratories PRO LOGIC DP563 User Manual

Input

Channel

Lt Output

Level Expected

Offset

Rt Output

Level Expected

Offset

Lt Output

Level Expected

Offset

Rt Output

Level Expected

Offset

Left 0 dB <–60 dB 0 dB <–60 dB

Right <–60 dB 0 dB <–60 dB 0 dB

Center –3 dB –3 dB –3 dB –3 dB

Ls* –1.2 dB –6.2 dB –3 dB*** –3 dB***

Rs* –6.2 dB –1.2 dB –3 dB*** –3 dB***

LFE** 0 dB 0 dB 0 dB 0 dB

Calibration

It is necessary to calibrate the DP563 to your local reference level. Simply introduce a 1 kHz signal into the left input channel of the DP563 at reference level using the “Auto Calibrate” function. Alternatively, the DP563 can be calibrated manually by using the up/down cursor keys to adjust the internal level until the LCD displays the desired level. While in manual calibration mode, the level can be reset to the default value of –20 dBFS by pressing the up and down cursor keys simultaneously.

Output and LFE Limiters

LFE Limiter

During Pro Logic II or Dolby Surround encoding with an LFE signal present at the input, a soft limiter (attack time 5 ms, release time 1 s) can be applied to the LFE signal prior to being combined with the Left and Right channels. This limiter helps to prevent high-level LFE signals from overloading the output signal.

Output Limiter

Since both Dolby Surround and Pro Logic II encoding are additive processes, there is a possibility that high-level input signals can create an overload condition when matrix encoded. An output limiter (attack time 0.5 ms, release time 100 ms) is provided to protect against this condition. When the output limiter is disabled, a hard clipper is used to prevent overload.

Metadata Control

When audio metadata is present at the rear-panel connection, the DP563, under metadata control, responds to the following metadata parameters:

Metadata Source: Selects whether external metadata is used

to configure the unit.

Disabled: Metadata is not used. Program Number: Use the corresponding program in the

external metadata signal.

Dialogue Normalization (Dialnorm): The encoded output

level is adjusted to match a dialnorm value of –31. For example, when receiving a dialnorm value of –25, the DP563 adjusts its output level –6 dB to normalize the audio level to –31 dB, relative to digital full-scale. Note: The actual digital fullscale output level is affected by the output level trims.

LFE Channel: When the LFE channel is enabled, a trim is

applied based on the value selected in the Metadata Override/LFE Channel parameter. When audio metadata indicates presence of an LFE channel, and the DP563 is encoding in Pro Logic II mode, LFE processing is automatically enabled.

Channel Mode: The Channel mode parameter within the

incoming metadata stream tells the DP563 how many channels to use when creating its output signal. The DP563 processes the surround channels slightly differently between Dolby Surround or Pro Logic II encoding, per the incoming metadata stream. When receiving programs with a single Surround channel, Dolby Surround encoding passes the single Surround channel to both Left and Right Surround processors. When receiving programs with stereo Surround channels, Dolby Surround encoding combines the stereo Surround signals prior to mono surround encoding. Stereo (2/0) programs are adjusted according to the dialnorm parameter and sent to the output, while mono (1/0) programs are attenuated 3 dB, sent to the Left and Right channels, adjusted for dialnorm, and passed to the output.

Downmix Parameters: The DP563 adjusts the appropriate

input channel according to the downmix parameters within the incoming metadata stream. If extended bitstream metadata is present, the DP563 uses these parameters, including the “Preferred Downmix” parameter, which can indicate either Lt/Rt or Lo/Ro. If Lo/Ro is indicated, the DP563 does not matrix encode the input channels using either Dolby Surround or Pro Logic II technology, but rather uses the downmix parameters to create an Lo/Ro mix that is not intended for Dolby Surround or Pro Logic II decoding.

Surround 3 dB Attenuation: The DP563 inserts a 3 dB

attenuation on the Surround channels when instructed by external audio metadata.

Dolby®Pro Logic®II Basics

Unlike the Dolby Pro Logic system, which offered four channels of audio (L, C, R, and S), including a band limited (100 Hz–7 kHz) surround channel, the Dolby Pro Logic II system features five-channel encoding and full bandwidth audio in all five main speaker channels. Pro Logic II provides improved matrix steering that results in greater channel separation and an exceptionally stable soundfield. Both Dolby Surround and Pro Logic II are stereo and mono compatible, and Pro Logic II is compatible with existing Pro Logic decoding systems. The DP563 Pro Logic II Encoder features user-adjustable premix settings, providing a simple method to create an Lt/Rt mix from an original discrete

5.1 program.

Front-Panel Features

Reset

The DP563 can be reset to factory defaults, erasing all saved presets and configurations. Hold down the Enter button during a power cycle and follow the prompts on the display to re-initialize the unit to the factory settings.

Firmware Upgrade

Updates to the operating system software are periodically available for download at www.dolbysupport.com. Software upgrades are possible through the front-panel remote connector (RS232) or the rear remote connection (RS485). Hold down the Setup button during a power cycle and follow the prompts on the display.

DP563 Dolby®Pro Logic®II and Sur round Encoder Quick Star t Guide

Metadata Control–continued

Reversion Mode:

When under metadata control, the DP563 uses one of three modes to determine the behavior of the unit when the external metadata source is interrupted or corrupted:

Last Used: Uses the last valid metadata parameters received

until new valid metadata parameters are received.

Internal Params: Uses internal settings until valid metadata

parameters are received.

Mute Outputs: Mutes DP563 outputs until valid metadata

reappears.

Override Parameters: The DP563 can override certain

metadata parameters while still looking at the external metadata source for others.

Selectable parameters for override:

Dialogue Level: The Dialnorm parameter is used to produce

a normalized loudness level equivalent to –31 dBFS LeqA . For more information on program loudness, see the LM100

User's Manual available at

www.dolbysupport.com. Note:

The actual output level will also be affected by the output trims.

LFE Channel:

The DP563 ignores the LFE Channel parameter within the incoming metadata stream, allowing the LFE channel to be hard-enabled or hard-disabled in the encoded Lt/Rt output. The default is disabled.

Preferred Downmix: This parameter is present only when

extended bitstream metadata is used. This override allows the user to ignore this parameter and enable or disable Dolby Surround or Pro Logic II encoding at all times.

Surround 3 dB Attenuation: The DP563 can ignore this

parameter and either enable or disable surround channel attenuation when under external metadata control.

I/O Control

Enter through the Setup/I/O menu.

Input Channels

Maps digital inputs to audio channels. The six predefined channel mappings are:

Clock Source

The DP563 requires a valid AES sample clock reference to operate. The unit can be locked to Digital Input 1/2 or to the external reference input. When using the Ref In, sample rate converters (SRC) can be selected, which will convert the input signals to the external reference if desired. This is useful when it is necessary to avoid sample clock differences resulting from multiple input signals being switched into the DP563.

Digital In: Digital Input 1/2 is used as the clock source. Ref In: An audio sample clock signal presented at the Ref

In connector can be used as the system clock reference with sample rate conversion enabled or disabled.

Output Word Length

The DP563 operates with 24-bit precision. When used with equipment that does not support 24-bit resolution, the output word length can be dithered to a shorter length. The default setting is 20-bit.

Coding Delay

The minimum coding delay through the DP563 is less than 2 ms. This delay can be incremented in PAL or NTSC video frames, fields, or in milliseconds. The maximum delay setting is two video frames or 100 ms. When in bypass mode, the DP563 delay is less than 2 ms.

Bypass Mode

When in Bypass mode, the DP563 routes the L/R inputs to the Lt/Rt outputs without any premixing, encoding, word length reduction, or limiting. The system delay in Bypass Mode is less than 2 ms, and is not affected by the Coding Delay setting.

Mode Channel Config

1 L/R Ls/Rs C/LFE 2 L/C R/Ls Rs/LFE 3 L/Ls C/Rs R/LFE 4 L/R C/LFE Ls/Rs 5 L/R C/Ls Rs/LFE 6 C/L R/Ls Rs/LFE

Lt/Rt Output Levels

When running test signals on individual input channels through the unit, use the following matrix to confirm the appropriate output level corresponding to the input channel. Note that any channel level trims and the Surround 3 dB metadata value (when under external metadata control) will affect the expected output level offset.

* Note that when sending a test signal to either the Ls or Rs

input, the Lt/Rt output will be out of phase.

** Note that the LFE Source menu selection will determine

whether the LFE input is active.

***Note that the Surround Source menu selection will determine

the active input channels.

Pro Logic II Encoding Dolby Surround Encoding

DP563 Main Setup Menu

Operating Mode

Dolby Pro Logic II

Coding Mode

Dolby Surround

Metadata Control

Disabled

Metadata Source

Program 1-8

Last Used

Auto Calibrate

ENTER=Yes

ESC=No

Reversion Mode

Internal Params

Mute Output

Manual Calibrate –26dB - –8dB

Dialogue Level

LFE Channel

Override Params

Pref Downmix

DIGITAL INPUT METER LED &

CHANNEL ACTIVITY METER LEDS

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)

Function Color Indication

Off Both output and LFE limiters are disabled Limiter Green Either or both limiters are enabled, and not currently limiting Red Either limiter is enabled and is engaged Fault &

Off Normal operation Error

Red Fault Off Remote Mode disabled Remote Green Remote enabled, no communication error Red Remote enabled, communication error Off The Ref Input is not selected as the clock source Ref In Green The Ref Input is selected and locked to an AES reference without errors Red The Ref Input is selected but invalid Off Normal operation

Test

Red Test tone output is enabled and audio inputs are ignored

FUNCTION LEDs

Srnd 3dB Attn

Internal Params

Ext Metadata

–31dB - –1dB

Disabled

Enabled –20dB - +10dB

Ext Metadata

Lt/Rt

Lo/Ro

Ext Metadata

Disabled

Enabled

Surround Source

Center Trim –3dB - +3dB

Surround Trim –6dB - 0dB

LFE Trim –20dB + 10dB

Disabled

LFE Source

Enabled

Disabled

LFE Filter

Enabled

Disabled

LFE Limiter

Enabled

Preset Name Coding Mode Calibration Level Metadata Source Reversion Mode Override/Dialogue Level Override/LFE Channel Override/Pref Dwnmix Override/Srnd 3dB Attn Center Trim Surround Trim LFE Trim Surround Source LFE Source LFE Filter LFE Limiter Output Limiter Output Trim Input Channels Clock Source Output Word Len Coding Delay Bypass Mode Remote Baud Rate Unit Address

PRO LOGIC II

Dolby Pro LogicII

–20 dB

Disabled

Last Used

Ext Metadata

Disabled Ext Metadata Ext Metadata

0 dB 0 dB

+7 dB

Ls=Ls Rs=Rs

Disabled

Enabled Enabled Enabled

0 dB

L/R C/LFE Ls/Rs

Digital Input

20 bits Minimum Disabled

38400 bps

8280

Postprocessing

Output Limiter

Output Trim

Ls=Ls Rs=Rs

Ls + Rs

Ls – Rs

PRESETS

PLII EXT MD

Dolby Pro Logic II

–20 dB Program 1 Last Used

Ext Metadata

Disabled Ext Metadata Ext Metadata

Ls=Ls Rs=Rs

Disabled

Enabled

L/R C/LFE Ls/Rs

Digital Input

20 bits Minimum Disabled

38400 bps

–10dB - +4dB

0 dB 0 dB

+7 dB

0 dB

8280

Enabled

Disabled

Pro Logic II Encoding

Dolby Surround Encoding

DS 4-CHANNEL

Dolby Surround

–20 dB

Disabled

Last Used

Ext Metadata

Disabled Ext Metadata Ext Metadata

0 dB 0 dB

+7 dB

Disabled

Enabled Enabled Enabled

0 dB

L/C R/Ls Rs/LFE

Digital Input

20 bits Minimum Disabled

38400 bps

8280

User Presets

Recall Preset

Save Preset

DS WITH PREMIX

Dolby Surround

–20 dB

Disabled

Last Used

Ext Metadata

Disabled Ext Metadata Ext Metadata

0 dB 0 dB

+7 dB

Ls+Rs Enabled Enabled Enabled Enabled

0 dB

L/R C/LFE Ls/Rs

Digital Input

20 bits

Minimum Disabled

38400 bps

8280

I/O Control

L/R C/LFE Ls/Rs

(Mode 4)

L/R C/Ls Rs/LFE

(Mode 5)

C/L R/Ls Rs/LFE

Input Channels

Clock Source

Output Word Len 16-24bits

Coding Delay

Bypass Mode

(Mode 6)

L/R Ls/Rs C/LFE

(Mode 1)

L/C R/Ls Rs/LFE

(Mode 2)

L/Ls C/Rs R/LFE

(Mode 3)

Digital Input

Ref In SRC On

Ref In SRC Off

Minimum

2-100 msec

1-4 NTSC Fields

1-2 NTSC Frames

1-4 PAL Fields

1-2 PAL Frames

Disabled

Enabled

System Settings

Remote Baud Rate

Unit Address

Unit Name

Test Tone

When encoding Dolby Pro Logic I

When encoding Dolby Surround

Firmware Upgrade

LCD Contrast Adjust

Press and release

Adjust contrast using

38400 bps

19200 bps

9600 bps

8280-FFFE

Disabled

Left

Center

Right

Left Surround

Right Surround

Surround

ENTER=Yes ESC=No

SHIFT

Software v2.0.6.0