Dolby Metadata Presets
Eight Dolby Metadata Presets can be configured. By default, presets 1 - 4 have the same configuration recommended by
EricssonTelevision. Presets 5 - 8 are by default configured to the Dolby defaults for "Stereo Film", "Stereo Music", "Surround Film"
and "Surround Music" respectively. All of the parameters in the presets can changed to the users requirements. Any of these presets
can then be applied to any audio channel encoding audio in the Dolby Digital format. The table lists the parameters for each preset.
DD Plus Pass Thru
Embedded PCR
Sets PCR to be embedded in the audio stream or on a
separate PID
Lipsync Offset
Configure a delay to the audio to improve A/V synchronisation
DolbyE Pass Thru
Embedded PCR
Sets PCR to be embedded in the audio stream or on a
separate PID
AU Ctrl
Controls the data put into the TS for audio Access Units (AU).
AU info is defined in ETSI 101 154.
Lipsync Offset
Configure a delay to the audio to improve A/V synchronisation
Linear Pass Thru
(SMPTE 302M)
Channel Mode
Sets the required number of channels
Bit Depth
Sets the required output bit depth (word size).
Channel Identification
Sets the channel number of the first channel in the SMPTE
302M ES
Embedded PCR
Sets PCR to be embedded in the audio stream or on a
separate PID
AU Ctrl
Controls the data put into the TS for audio Access Units (AU).
AU info is defined in ETSI 101 154.
Lipsync Offset
Configure a delay to the audio to improve A/V synchronisation
Aud Desc Service
Embedded PCR
Sets PCR to be embedded in the audio stream or on a
separate PID
Lipsync Offset
Configure a delay to the audio to improve A/V synchronisation
Language
Sets the language descriptor
MPEG Version
Configure MPEG-1 or MPEG-2
Copyright
Indicates if the material is copyright protected.
Original
Indicates if source is the original or a copy
De-Emphasis
To meet the MPEG-1 Layer 2 encoding algorithm specification
the audio must not have pre-emphasis applied. If the input
signal does have pre-emphasis applied, a de-emphasis filter
must be applied prior to encoding.
Action on Contrack Loss
Controls if the PID is dropped (bit rate saving) or if no action
is taken
Action when silence detected
Controls if the PID is dropped (bit rate saving) or if no action
is taken
Silence Threshold
Defines the level that the audio track is deemed as silent when
the audio description service is present.
Silence Period
Defines the time that the audio track is silent before the audio
description service PID is dropped from the output.
Selected Option
Description
Preset name
Name of the preset (for user information)
Dialogue normalization level
Used by a decoder to determine the level of adjustment required to achieve this the set
level.
Bitstream mode
Flags the type of service in the bitstream.
Line mode compression profile Alters the dynamic range for line output.
RF mode compression profile
This alters the dynamic range for RF output. The overall level is raised by 11dB.
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