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EN/LZT 790 0023/1 R16A
5-125
Table 5.107 Dolby Metadata Preset Parameters
Parameter Values Description
Preset name Name of the preset (for user information)
Dialogue
normalization level
-31 to -1 dB
Used by a decoder to determine the level of adjustment
required to achieve the set level.
Bitstream mode
Main audio service: complete main, music and
effects, Associated service: visually impaired,
Associated service: hearing impaired,
Associated service: dialogue, Associated
service: commentary, Associated service:
emergency, Associated service: visually
impaired, Associated service: karaoke/voiceover
Flags the type of service in the bitstream.
Line mode
compression profile None, Film Standard, Film Light, Music
Standard, Music Light, Speech Alters the dynamic range for line output.
RF mode compression
profile None, Film Standard, Film Light, Music
Standard, Music Light, Speech This alters the dynamic range for RF output. The overall
level is raised by 11dB.
Center mix level 0.707 (-3.0 dB), 0.595 (-4.5 dB), 0.500 (-6.0 dB) Indicates the downmix level when there is no centre
speaker. This is applied to left and right channels only.
Surround mix level 0.707 (-3.0 dB), 0.500 (-6.0 dB), 0 (-inf dB) Surround downmix level for the front left and right
channels when consumer has no surround speakers.
Dolby Surround mode Not Indicated, Not Encoded, Encoded Flags if a two channel encoded stream contains
information for a Dolby Pro-logic decode (Lt/Rt)
Audio production
information exists Off, On This indicates whether the Mixing Level and Room Type
parameters exist within the bit-stream.
Mixing level 80 to 111 dB Indicates the acoustic sound pressure level of the dialogue
level during the final audio mixing session.
Room type Not indicated, Large room X curve monitor,
Small room flat monitor Type and calibration of the mixing room used for the final
audio mixing session.
Copyright flag Off, On Indicates if the material is copyright protected
Original bitstream flag Off, On Indicates if source is the original or a copy
Enable extended
bitstream information Off, On Flags if additional information is available for downmixing.
Preferred downmix
mode Not indicated, Lt/Rt downmix preferred, Lo/Ro
downmmix preferred Indicates if the producer would prefer a Lt/Rt or a Lo/Ro
downmix. Can be over-ridden by the decoder.
Lt/Rt center mix level 1.414 (+3.0 dB), 1.189 (+1.5 dB), 1.000 (0 dB),
0.841 (-1.5 dB), 0.707 (-3.0 dB), 0.595 (-4.5 dB),
0.500 (-6.0 dB), 0 (-inf dB) Indicates the required level reduction of the center channel
when mixed with the L& R channels for a Lt/Rt downmix.
Similar to 'Center mix level'.
Lt/Rt surround mix
level 0.841 (-1.5 dB), 0.707 (-3.0 dB), 0.595 (-4.5 dB),
0.500 (-6.0 dB), 0 (-inf dB) Indicates the required level reduction of the surround
channels when mixed for a Lt/Rt downmix. Similar to
Surround mix level'.
Lo/Ro center mix level 0.841 (-1.5 dB), 0.707 (-3.0 dB), 0.595 (-4.5 dB),
0.500 (-6.0 dB), 0 (-inf dB) Indicates the required level reduction of the center channel
when mixed with the L& R channels for a Lo/Ro downmix.
When present this replaces the value set for the 'Center
mix level'
Lo/Ro surround mix
level 0.841 (-1.5 dB), 0.707 (-3.0 dB), 0.595 (-4.5 dB),
0.500 (-6.0 dB), 0 (-inf dB) Indicates the required level reduction of the center channel
when mixed for Lo/Ro downmix. When present this
replaces the value set for the 'Surround mix level'.
Dolby Surround EX
mode 0.841 (-1.5 dB), 0.707 (-3.0 dB), 0.595 (-4.5 dB),
0.500 (-6.0 dB), 0 (-inf dB) Flags if the stream has been encoded in Surround Ex.
Only used if surround channels are present.