RoadRunner
U S E R S G U I D E
49
decoder ACE must be set individually for bi-directional protection.
Audio will be muted if your encoder ACE is set ON and the far-end
decoder ACE is not.
Use the
ESP
(encoder) and
DSP
(decoder) commands or the keypad
sequences
<Advanced><Encoder><ACE>
and
<Advanced><Decocder><ACE>
to enable this function. Please note that ACE is not compatible with
other manufacturers products.
Sine Detector
MPEG algorithms, in particular, the bit allocation portion of the
compression scheme, handles normal audio in a different manner that
pure tones, the discussion of these differences is well beyond the scope
of this manual.
The encoder Sine Detector should be used only when using test
equipment to evaluate codec performance.
For normal operation, the
sine detector should be OFF.
The state of the Sine Detector is
toggled
using the
ESD
command or the keypad sequence:
<Advanced><Encoder><Sine Det>
Only MPEG Layer 2 algorithms support the Sine Detector function.
Header and Status Bits
ISO Header bits
— There are five user settable ISO header bits:
Copyright (
ECR
), Emphasis (
EEP
), Original (
EOR
), Protect, (
EPR
) and
Private (
EPI
). These bits can be used as signaling bits by the far end
decoder. The state of these bits is can be observed using the decoder
status bits on all
CDQ
Prima. Prima LT
and
RoadRunner
codecs.
Status bits
(
DRS
) — The status bits are used to ‘read’ the status of the
user selectable encoder header bits.
Use the
<Advanced><Encoder><ISO Header>
sequence to set the header bits, and the
