Operating the Equipment Locally — Audio Menu
Reference Guide: evolution 5000 E5780 and E5782 Encoder
Page 4-55
ST.RE.E10135.4
Selected Item
Options
Description
Option Availability
A
B C D
2/0 (L,R)
3
3
3
3
3/2(L,C,R,Ls,Rs)
3
2
2
2
5.1
—
7.1
Front L+R
Subwoofer
Surround L + R
Rear L + R
3/2L(L,C,R,Ls, Rs,LFE)
3
2
2
2
5.1
—
7.1
Front L+R
Subwoofer
Surround L + R
Rear L + R
Coding Mode: (continued)
When a multichannel coding mode
is selected, the channels are
presented to the module inputs as
shown alongside.
Adv
anc
ed A
udi
o C
odi
ng (AAC)
1+1
3
3
3
3
Coding Standard:
This option defines the standard that is used for the audio encoding operation
associated with this menu. The available standards are shown in Table 4.16.
Component Tag:
This item defines the optional component tag to be assigned to this audio
stream.
Copyright:
Control the Copyright flag in the
bitstream.
If set to On the bitstream is shown to be protected by copyright.
DC Filter:
Turn on or off a dc high pass filter
in the input channel.
Removing the dc component can allow more efficient coding. However, there is
a risk that signals that do not reach 100% PCM level before high pass filtering,
will exceed 100% level after filtering and therefore be clipped.
MPEG Layer 2
To meet the MPEG Layer 2 audio encoding algorithm specification, the audio
must not have pre-emphasis applied. If the input signal does have pre-
emphasis applied, a de-emphasis filtering process must be applied prior to
encoding.
Dolby Digital
To meet the Dolby Digital audio encoding algorithm specification, the audio
must not have pre-emphasis applied. If the input signal does have pre-
emphasis applied, a de-emphasis filtering process must be applied prior to
encoding.
De-emphasis:
This option is turned on in order to
de-emphasise pre-emphasised
audio input into the Encoder.
For a digital audio input, pre-emphasis detection is typically achieved by monitoring the pre-emphasis
flags within the channel status data of the incoming digital audio signal. The de-emphasis is automatically
adjusted when the Encoder is set to Auto.
For an analogue audio signal, the user must manually select the appropriate de-emphasis filter.
Dialogue Level:
Set the dialogue level that the
Encoder will signal in the
bitstream.
–1 dB to –31 dB
The dialogue level indicates how far the average dialogue level is below digital
100%. It is not used by the Dolby Digital decoder, but may be used by other
parts of the sound reproduction system.
Not indicated
It is not known if the bitstream is conveying a Dolby Surround encoded
program.
Not Dolby Surround
The bitstream is not conveying a Dolby Surround encoded program.
Dolby Surround
The bitstream is conveying a Dolby Surround encoded program.
Dolby Srnd Mode:
Select whether the bitstream is
signaled as conveying a Dolby
Surround encoded program or not.
This option is only available if the coding mode is 2/0(L,R). This information is not used by the Dolby
Digital Decoder, but may be used by other parts of the sound reproduction system.
DSP Codec Id
It is for status only and cannot be changed.
