Download Dolby Laboratories SDU4 Specifications

5.1-Channel Production Guidelines
Production Environment
For example, if distance C is two feet less than distance L or R, Center delay is set to
2 ms. If distance C is two feet more than distance L or R, Center delay is set to -2 ms.
To make the Center delay negative, the decoder actually sets C delay to zero and adds
delay to the Left, Right, Left Surround, and Right Surround outputs of up to 3 ms. This
ensures coincident arrival of the Surround and front channel signals.
3.5.3
Compatibility with Dolby Surround Monitoring
When monitoring Dolby Surround signals, a decoder adds additional delay (typically
15 ms) to the Surround channel output. When using a Dolby SDU4 or Dolby DP562
for Dolby Surround decoding, the minimum delay setting for these units will allow
them to be used with 5.1-channel monitoring systems.
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