Ericsson SPR1100, Руководство пользователя, Страница: 202 / 256

Selected Option Description
Room type
Type and calibration of the mixing room used for the final audio
mixing session.
Copyright flag Indicates if the material is copyright protected
Original bitstream
flag
Indicates if source is the original or a copy
Enable extended
bitstream information
Flags if additional information is available for downmixing.
Preferred downmix
mode 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
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 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
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
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 Flags if the stream has been encoded in 'Surround Ex'. Only used if
surround channels are present.
A/D converter type Indicates type of A/D conversion used.
Digital de-emphasis
To meet the Dolby Digital 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.
DC high pass filter
enable
Removing the DC component can lead to more efficient encoding,
but there is a risk that signals that do not reach 100% PCM may
exceed this after filtering and therefore must be clipped.
Bandwidth low-pass
filter enable Remove high frequency signals before encoding. The filter removes
frequencies that would not normally be encoded.
Low-frequency effects
low pass filter enable
Apply a 120 Hz low pass filter prior to an encode. Should only be
switched off if it is known that there are no frequencies above 120
Hz.
Surround attenuation
enable
Attenuate surround channels by 3 dB before encoding. Theatrical
and consumer mixing rooms use different levels for the surround
channels, and this can be used to compensate.
Surround phase shift
enable Apply a phase shift of 90 degrees to the surround channels. This
simplifies the decode process for producing a 'Lt/Rt' downmix.
© Ericsson AB 2011. All rights reserved
Room type
Type and calibration of the mixing room used for the final audio
mixing session.
Copyright flag Indicates if the material is copyright protected
Original bitstream
flag
Indicates if source is the original or a copy
Enable extended
bitstream information
Flags if additional information is available for downmixing.
Preferred downmix
mode 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
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 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
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
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 Flags if the stream has been encoded in 'Surround Ex'. Only used if
surround channels are present.
A/D converter type Indicates type of A/D conversion used.
Digital de-emphasis
To meet the Dolby Digital 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.
DC high pass filter
enable
Removing the DC component can lead to more efficient encoding,
but there is a risk that signals that do not reach 100% PCM may
exceed this after filtering and therefore must be clipped.
Bandwidth low-pass
filter enable Remove high frequency signals before encoding. The filter removes
frequencies that would not normally be encoded.
Low-frequency effects
low pass filter enable
Apply a 120 Hz low pass filter prior to an encode. Should only be
switched off if it is known that there are no frequencies above 120
Hz.
Surround attenuation
enable
Attenuate surround channels by 3 dB before encoding. Theatrical
and consumer mixing rooms use different levels for the surround
channels, and this can be used to compensate.
Surround phase shift
enable Apply a phase shift of 90 degrees to the surround channels. This
simplifies the decode process for producing a 'Lt/Rt' downmix.
© Ericsson AB 2011. All rights reserved