Audio Modes
Page F-4
Reference Guide: Voyager E5784 and E5788 HD DSNG Encoder
ST.RE.E10137.3
F.3
Embedded Audio on the SDI
Figure F.3 shows the audio signal flow on the Base Board. While eight
audio stereo pairs are available, only two stereo pairs can be processed by
the Base Board at any one time.
Audio can be embedded on a SDI video feed. The specified groups are:
1, 2, 3, 4. Each group contains two stereo pairs, hence each SDI can carry
a maximum of 2 x 4 = 8 stereo pairs, or 16 mono channels.
Each group has an associated Data Identifier (DID). The standard DIDs are
typically:
SD
HD
•
Group 1 = 0x2FF
0x2E7
•
Group 2 = 0x1FD
0x1E6
•
Group 3 = 0x1FB
0x1E5
•
Group 4 = 0x2F9
0x2E4
F.4
Detail of Encoder Operation
The Encoder can de-embed any two DIDs at any one time, thus giving a
total of four embedded audio sources: embedded audio 1-4.
The default DID for embedded audio 1-2 is (SD) 2FFh or (HD) 0x2E7
(Group 1).
The default DID for embedded audio 3-4 is (SD) 1FDh or (HD) 0x1E6
(Group 2).
The DIDs are located in ancillary packets in the data stream.
NOTE…
Default DIDs are selected when a DID value
≥
1024 is set.
