Spdif; Message Handling - DCS 900E User Manual

dCS 900E / 902E User Manual
dCS Ltd

SPDIF

Message Handling

The SPDIF interface (sometimes known as the Consumer AES/EBU interface)
transmits a data structure that conforms to the IEC 958
AES/EBU, this contains 28 bits of Manchester encoded data, and a 4 bit near-
Manchester encoded preamble in a subframe, and subframes are further
assembled in a block and frame structure.
voltage levels, and the Channel Status bits (the System Message). It contains
24 bits of audio data.
IMPORTANT!
structures, although the messages are completely different. The two
structures are identified in the data domain by the use of the
Consumer/Professional bit (bit 1 in the message). A "1" indicates AES/EBU
format, a "0" indicates SPDIF format.
The default SPDIF message attached to the output data by the unit before being
changed by the user is as follows:
Professional:
Non-Audio:
Copy Permit:
Format:
9
See EN 60958:1995 or IEC958:1989 with amendments 1 & 2. The structure of the message is sufficiently
complex that it is best to read the source material.
Manual part no: DOC0029021E1
Contact on + 44 1799 531 999
dCS
(inside the UK replace + 44 with 0)
All manuals and user guides at all-guides.com
-
The AES/EBU interface and the SPDIF interface have similar data
Off
Off
On
2-Channel General Format
Page 45
Manual for Software Versions 1.3x to 1.5x
9
standard. Like the
The difference lies only in the
Document No: OS-MA-D0002-902.1E1
email to: more@dcsltd.co.uk
web site: www.dcsltd.co.uk
th
12 June 2000