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( a eb elow) . . > paluer rr p r trbh kw
Cause Locrtlon Lallon (d (;rwr]
(8- blow) . f > palus as per hbh bdow)
EHnt bm:
Clear Back
Cause Class Caur Clau
AMS(R)S C WW:
Call Progress - Channel Release
> p/ alues ms per tatdm klowl
Cause Valu. Cause Vrlw
Proudurn Uuge:
GES Incoming
... -~ . . ~
Comments:
Figure AS-38
SPECIFIC C M l b U PARAMETER CODING INDICATIVE OF YHlS EVENT
Event Trim~er
Normal backward claarlng
Codi~pSt d.
0
Loatlan
0
a u u c L . u
1
CnuUVdw
0
Part I Annex 10 - Aeronautical Telecommunicutions
Parameter Mawlnu:
MAPS INTO:
I BITE PARAMETER
(S" bb)
Cause tku
E d N.m:
Sending Finished - Set Up Speech Condition
LlCl PARAMETER CODING
AMqR)S CWIDU:
Call Progress - Call Attempt Result
Routlng
Cchnnl wbbmnd
Comments:
hadure Uugr:
GES Incoming
SPECIFIC CM-UDU PARAMETER COMNO INDICATNE OF THIS WENT
Evant Trlggu
AMreu compMa sl-l rerhrrd ham the brrrwbbl notuuork
Cmu-VaLU.
1
Cdwfd
1
-
6 0
Annex 10 - Aeronnuticul T~bcommunicatwns Volume ZZZ
Paramctu Mapptng:
BITE PARAMETER I LICI PARAMETER CODING
Codlng Sandard S (Coding Slandrrd)
>.,,,,,(
MAPS INTO:
Cause Locatlon
alms as prr tabla klwv]
30 (hex)
Comments:
Ewnt Name:
Release Incoming Side
Figure AS-40
AMS(R)S CWDU:
Call Progress - Channel Release
SPECIFIC CMllDU PARAMETER CODING INDICATIVE OF THIS WENT
k#rdurc U.rgr:
GES Incoming
C m m e V ~ l ~
0
Evwt T r i g g ~
Release lncornlna Slde event recelved from brrartrlal network
(Normal backward clearlng)
M n g # d
0
W o n
0
an-
1
Appendix 6 to Chapter 4
AMS(R)S CONFIGURATION PARAMETERS
Table A6-1. Circuit-mode configuration parameters
Parameter Description Value
nA2 1 Length of CM-LIDU series for distress/urgency air-orginations
nA22 Length of CM-LIDU series for flight safety air-originations
nA23 Length of CM-LIDU series for regularity/meteorological air-originations
ANNEX 10 - VOLUME 1I1
Appendix 7 to Chapter 4
VOICE ENCODING ALGORTTHM DEFINITION
Note.- The voice encoding algorithm is subject to BT
(formerly British Telecom) patent rights and copyrights. BT
has agreed to grant royalty-free non-exclusive licenses under
such patent rights and copyrights to all manufacturers of AES
and GES implementations operating in the AMS(R)S service.
These manufacturers should enter into a royalry-jree Eiumse
agreement with BT Laboratories prior to incolporating the
algorithm in eguipments operating in the AMS{R)S service.
Interoperability of equipments operating in the AMS(R)S
service can only be ensured if all provisions of this algorithm
definition are fully complied with.
Note 1.- Refer to Figure A7-I * for a schematic representatio~
io f the algorithm.
Note 2.- The $ow and processing of information within
the algorithni is defined with the use of the Pascal language.
Individual implementations of this algorithm need not use this
language.
Note 3.- All scalar variable names are depicted with a
simple name. All vector variable names are depicted with a
simple name followed by paired brackets {[I);
2. REQUIREMENTS FOR
NUMERIC CALCULATIONS
Except where explicitly noted, and except for obvious integer
variables such as vector indices and loop counters, all
variables shall be maintained as floating-point values with a
minimum mantissa precision of 24 bits inclusive of a sign bit.
The range of the associated exponent shall be such that the
magnitude of a positive or negative non-zero variable can vary
over a minimum range of 5.87747*10-3' to 3.40282*10~~.
Note.- Compliance with this rninimum numeric range is
essential if interoperabili~b etween dzfferent vocoder implementations
is to be ensured.
3. AUDIO INPUT
CHARACTERISTICS
3.1. Audio input spectral
characteristics
Prior to sampling and quantization, speech audio which is
presented to the encoding algorithm shall exhibit the following
minimum spectral characteristics. These characteristics may be
met by any combination of specific anti-aliasing filters and/or
the natural spectral roll-off characteristics of transducers and
audio channels:
Note.- All specifications are referenced to I 120 Hz.
a) over a passband of 300 to 3 400 Hz, a gain variation
of no more than +2 dB;
b) over a transition band of 4 000 Hz to 4 600 Hz, a gain
of -45 dB or lower; and
　
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