Chapter 6 Audio Configuration
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138
Ellipse 3000 Release 3.0, Rev. B
Audio General Menu
6.2.1
Coding Scheme
The Coding Scheme parameter allows setting the coding scheme of the audio channel. Selecting a
coding scheme – MPEG-1 Layer 2, Dolby Digital, AAC LC, or a pass through coding scheme—
enables the configuration menu suitable for that coding scheme.
NOTE:
Before setting the coding scheme, the user must set the Activation mode of the audio channel to
Disabled.
On the front panel, any changes last only 60 seconds while the Warning LED blinks. Therefore, when setting a
new coding scheme, for the change to be permanent or last longer the user must save the change (press F1, for
details, see
NOTE:
Due to the complexity and wide diversity of the Coding Schemes provided by the Ellipse Contribution
Encoders, a full detailed description is provided in
6.5 Coding Scheme Configuration
The available options are:
■
MPEG-1 Layer 2 (Default option)
– Sets the coding scheme of the audio channel to MPEG-1
Layer 2 analog, enabling the Musicam Configuration menu. See
.
■
DD 2.0
– Sets the coding scheme of the audio channel to Dolby Digital 2.0, enabling the Dolby
Digital 2.0 Configuration menu. See
6.5.2 Dolby Digital 2.0 Parameters
and
2.0 and Dolby Digital 5.1 Pre-Processing
■
MPEG-2 AAC LC
– Sets the coding scheme of the audio to embedded MPEG-2 AAC LC (Advance
Audio Coding – Low Complexity), enabling the MPEG-2 AAC LC Configuration menu. See
6.5.4 MPEG-2 AAC LC Parameters
■
DD Pass Through
– Sets the coding scheme of the audio to Dolby Digital pass-through, enabling
the Dolby Digital Pass Through Configuration menu. See
6.5.7 Dolby Digital Pass Through
.
■
Dolby E pass through
– Sets the coding scheme of the audio to Dolby E pass through, enabling
the Dolby E Pass Through Configuration menu. See
6.5.8 Dolby E Pass Through Parameters
.
■
Linear PCM pass through
– Sets the coding scheme of the audio to Linear PCM pass through
(Pulse Code Modulation), enabling the Linear PCM Configuration menu. See
■
MPEG-4 HE AAC
– Sets the MPEG-4 HE AAC (Advance Audio Coding - High Efficiency) is a lossy
data compression scheme for digital audio. It is an extension of MPEG-2 AAC LC optimized for
MPEG-4 low-bitrate applications such as streaming audio. See
.
■
Cue Tone
– Sets the Cue Tone parameters. See
.
■
DD 5.1
– See
.