Ericsson AVP 4000 - IP Input; VPS Audio Control

Advanced Video Processing and Networking
6-14
1/1553-FGC 101 1790 Uen Y
6.4.3 IP Input
The VCM can transcode or pass-thru up to four audio streams contained within an
input transport stream. Each stream comprises two channel pairs of compressed
audio data, most often compressed by a single encode instance upstream of the
AVP 4000.
6.4.4 VPS Audio Control
The unit enables extraction of VPS data from the incoming video VBI and signals
the audio control as shown in Table 6.5. The control of audio switching via VPS is
enabled when VPS is selected as a VBI input on line 16 and the encoded profile of
the video component is set to SD MPEG-2.
Note: When the GUI setting, for VPS to control the audio coding, is active, the
output of VPS on the separate VBI PID is not supported.
Table 6.5 Handling of VPS Data
VPS Signaling
User Parameters Codec
VPS Stereo Mode VPS Dual Channel Mode Mpeg2 HE-AAC / AAC AC3
DON’T KNOW n/a n/a USE CONFIG
NOT
SUPPORTEDⁿ
NOT
SUPPORTEDⁿ
MONO n/a n/a MONO LEFT
NOT
SUPPORTEDⁿ
NOT
SUPPORTEDⁿ
STEREO
Bit 5
Signalled*
n/a
JOINT STEREO
NOT
SUPPORTEDⁿ
NOT
SUPPORTEDⁿ
Not Signalled STEREO
Bit 6
Signalled* JOINT STEREO
Not Signalled STEREO
Bit 7
Signalled* JOINT STEREO
Not Signalled STEREO
Bit 8
Signalled* JOINT STEREO
Not Signalled STEREO
Stereo STEREO
Joint Stereo JOINT STEREO
DUAL SOUND n/a
Bit 5
Signalled* DUAL_MONO
NOT
SUPPORTEDⁿ
NOT
SUPPORTEDⁿ
Not Signalled MONO LEFT
Bit 6
Signalled* DUAL_MONO
Not Signalled MONO LEFT
Bit 7
Signalled* DUAL_MONO
Not Signalled MONO LEFT
Bit 8
Signalled* DUAL_MONO
Not Signalled MONO LEFT