Cobalt Digital COMPASS 9322 HD_SD De-Embedder - Manual (Page 20)

1
932X Functional Description
1-16 9323 GROUP PRODUCT MANUAL 9323G-OM (V4.6)
Dolby ® Identification and Metadata Output Processing
(See Figure 1-9.) All AES pairs and embedded channels are checked by the
+DEC card for valid Dolby
® status. When a valid Dolby ® encoded embedded
or discrete AES pair is detected, the channel pair carrying the Dolby ® format
is displayed as “Present Dolby E” or “Present Dolby Digital”, as applicable.
(The decoder always uses the metadata associated with its respective AES or
embedded pair.) A selected encoded channel pair can then be directed to the
Dolby
® decoder. The decoder then displays the Dolby ® bitstream format and
program configuration (for example, “Dolby E 20-bit 5.1+2” indicating
5-channel surround with LFE channel and stereo monitor pair) for the
selected pair, as defined by its metadata.
The +DEC card can embed metadata on the SDI output, sourced from either
SDI input video or from the decoder as desired. Similarly, the
DOLBY META
output can provide RS-485 metadata for downstream devices or systems.
Metadata on the
DOLBY META RS-485 output can also be sourced from either
SDI input video or from the decoder as desired.
Audio Decoding
(See Figure 1-9.) Based on the channels carrying the Dolby ® encoded pair and
the format defined within, the Dolby ® decoder provides up to 10 decoded
audio channels ( Dolby Ch 1 thru Dolby Ch 8 ; Dolby Mix 1 , Dolby Mix 2 ). Each
channel can be routed just as any other audio channel described in this
section.
Figure 1-9 Dolby
®
Decoding and Metadata Output Processing
SDI IN
De-embed
SMPTE 2020
De-mux
Discrete
AES IN Pair
Dolby ® Encoded Channel/
Format/Program
Identification (User
Interface Display)
SDI OUT
DOLBY
META
SMPTE 2020
Mux
Dolby ®
Decode
Dolby ® Encoded Embedded
Pair (1+2)...(15+16)
Dolby ® Encoded AES
Pair (1)...(8)
Ch 1
Mix 2
Dolby ®
Decoded
Audio
Channels (Ch 1...Mix 2)
2X2 Mux
Input Select
Input Video
Metadata
Decoder
Metadata