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Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder Page G-3
ST.TM.E10076.3
G.1 Analogue Audio
Figure G.1 shows the coding methods that may be used with the analogue
audio input.
Analogue Audio
Code to Linea
r
PCM
Linear PCM
Internal Coding
MUSICAM
Dolby (AC-3)
Independent of Encoder Clock Source
Figure G.1: Analogue Audio Modes
G.2 Digital Audio
When a digital audio source is used, consideration must be given to the
choice of clock source used by the Encoder. To ensure correct operation
the Encoder and the audio may need to be genlocked. Figure G.2 shows
the clock source that is appropriate for a given audio coding mode. The
two main clock sources are internal and external (derived from the H SYNC
input).
Digital Audio
Embedded
(SDI)
Pre-encoded
Dolby E
MUSICAM
Dolby (AC-3)
1.
Entire system must be genlocked to studio reference black and burst.
2.
Set Encoder clock source to HSYNC.
3.
Feed Dolby (AC-3) coder from genlocked output of the audio A/D.
Lock Dolby (AC-3) Encoder to AES/EBU reference from Encoder. Independent of Encoder
clock source
Inde
p
endent of Encoder clock source
Dolby (AC-3)
Linear PCM
Linear PCM
Internal Coding
A
udio Port
AES/EBU
Pre-encoded
Dolby E
Dolby (AC-3)
Linear PCM
Linear PCM
Internal Coding
or
*
*
*
MUSICAM
Dolby (AC-3)
*
*
Figure G.2: Digital Audio Modes