Ericsson AVP 4000, Справочное руководство, Страница: 235 / 422

Web GUI Control
1/1553-FGC 101 1790 Uen Y 5-51
Dolby Metadata Presets
Four custom Dolby Metadata Presets can be configured in the Advanced Setup tab of the
Device Configuration page. To set the preset options, in the Advanced Video Processor
Settings
drill down to
Encoder > Slots > Slot <n> - EI9001 >EI9001 > Audio Module >
Dolby Metadata Presets , and select the preset you want to modify. Alternatively, the
settings can be reached through the front panel under Advanced/EI9001/Audio
Module/Dolby Metadata Presets . 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.
Table 5.26 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'.