Dolby Laboratories S01/13621 - Manual (Page 40)

Dolby Installation Guidelines Serial Communications
6-4
For further information about metadata, see user manuals or the Dolby Digital
Professional Encoding Manual.
The DP569, DP570, and DP571 have metadata inputs; the DP570 and DP572 have
metadata outputs. Connecting a metadata input to a metadata output requires a 9-pin
male to male cable with direct connections between the pins. As metadata streams
only flow in one direction, the cable only requires pins 3, 8, and ground to be
connected. A metadata output can be connected to many metadata inputs. To do this,
cables can be wired that have multiple connections to the output pins. An example
application is shown in Figure 6-1. Each DP569 can be controlled by a separate set of
parameters in the metadata stream. The set of parameters is referred to as a program.
Metadata
DP569
(5.1)
DP569
(Two-Channel)
Two-Channel
Dolby Digital
Output
5.1
Dolby Digital
Output
Lt/Rt
L/R
C/LFE
Ls/Rs
DP572
Figure 6-1 Metadata Multidrop
6.4 Serial Control
Serial control is available for a number of Dolby pro audio products. Each product
requires an address to be assigned. The DP562 has a fixed address of 8282h. Other
products allow selection of a valid address as detailed in SMPTE RP113-1996. For
details of the serial control parameters of a particular model, please contact Dolby
Laboratories.
When designing serial control systems for Dolby products, it is useful to have
SMPTE RP113-1992 (Supervisory Protocol for Digital Control Interface) and
SMPTE RP 138-1192 (Control Message Architecture) for reference.