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Configuring Alarms
6
– Program config
– Dialnorm for program 1
– VU and Peak meters come from the AES in PCM
Definitions
Audio Format
The format of each audio channel (PCM, Dolby AC-3, Dolby E, other or Unavailable) is reported as a text
attribute, that can be assigned to a text level within a logical source.
Metadata
The metadata extracted from the VANC and from the Dolby E is available as text in the XEdit hierarchical
system list, and therefore can be exposed via any layout element capable of displaying text levels from
logical sources (currently only UMDs).
Dialnorm is displayed as a numeric value between -31 and -1 dB. Program Config is displayed as the Dolby E
Program Config description. Unavailable is displayed if the source is not being decoded, or is not Dolby E.
Logical Source Assignment
Logical source assignment is performed by dragging an AES pair onto a logical source’s audio level.
Term Definition
Dolby E Stream A coded (compressed) 8-channel digital stream that fits inside an AES channel
(L/R)
Dolby Metadata Metadata of Dolby E type such as dialnorm and program config
Dolby E Extracted [Metadata] Dolby metadata extracted from a Dolby E stream. Includes audio level data from
encoded audio data
VANC Extracted [Metadata] Dolby metadata extracted from VANC packets. Audio level data is probed
directly from the PCM AES signal
Embedded audio source or
channel 1 of the 8 SDI or HD-SDI embedded audio AES signals
AES Signal or Source A bit stream for audio service
Multichannel Audio Audio service or essence composed of more than 2 channels of audio (more
than Left and Right)