Digital Voice Systems Net-2000 Especificaciones descargar pdf (Pagina 42)

Net-2000™ VCU Users Manual

Version 4.0, December, 2013

File Mo

Voc

oders

Default

cmode

Values

VAD_ENABLE

VAD_LEVEL

TONE_DET_ENABLE

0x1000

NS_ENABLE

0x0040

AGC_ENABLE

0x2000

HPD_ENABLE

0x0200 (GMR-2+ )

DTX_ENABLE

0x0800

AMBE®

AMBE+™

0x1000 ON -25 ON N/A N/A N/A N/A

AMBE+2™ 0x1040 ON -25 ON ON N/A N/A N/A

APCO Standard 0x0000 N/A 0 N/A N/A N/A N/A N/A

APCO Enhanced 0x1040 ON 0 ON ON OFF N/A N/A

GMR-1 Vocoder 0x1040 ON -20 ON N/A N/A N/A N/A

GMR-2 Vocoder 0x1040 ON -25 ON N/A N/A N/A N/A

BGAN Vocoder 0x1040 ON -20 ON ON N/A N/A OFF

GMR-2+ Vocoder 0x1240 ON 0 ON ON OFF ON OFF

Table 7 cmode default values

To select more than one vocoder option at a time you must AND the desired ON /OFF values

The VAD level is set at the recommended value and should typically not be changed.

5.4.1 EXAMPLE (encode):

To encode a file of 16-bit PCM 8kHz voice samples to bits use the following command (on a single line):

net2k_file -ip <net2k_ip_addr> -r <vocoder_type>,<index_no> -e <input_file> <output_file>

where

<net2k_ip_addr> is the IP address of the net2k

(DEPENDING ON WHICH VOCODER IS IMPLEMENTED IN THE NET-2000)

<vocoder_type> is either one of the following

"ambe+2t,00" for GMR-1 at 4000 bps source 1200 bps FEC

or "ambe+2t,01" for GMR-1 at 4000 bps source 0 bps FEC

or "ambemm,01" for GMR-2 at 3600 bps source 0 bps FEC

or "ambe2000,<index_no>" where 0 <= <index_no> < 32 for AMBE-2000 compatible Rates

or "ambe+2,<index_no>" where 48 <= <index_no> < 64 for AMBE+2 rates

or "ambe+2a,<index_no>" where 0 <= <index_no> <= 3 for APCO Enhanced rates

or "ambe+2i,0" for BGAN rate of 4000 bps / 0 bps FEC

or "ambe+2g,<index_no>" for GMR-2+ where <index_no> sets the following rates

<index_no> = 0 for 6000 bps (2450 bps src / 3550 bps FEC)

<index_no> = 1 for 2450 bps (2450 bps src / 0 bps FEC)

<index_no> = 2 for Bit Steal 1 Bit (2450 bps src / 3550 bps FEC)

<index_no> = 6 for Bit Steal 1 Bit (2450 bps src / 0 bps FEC)

or "apco,0" for Standard APCO rate at 4400 bps source and 2800 bps FEC

or "apco,1" for Standard APCO rate at 4400 bps source and 0 bps FEC

or "u-law"

or "a-law"

(Subject to Change) Page 34

DVSI CONFIDENTIAL PROPRIETARY

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 74 75

Comentarios a estos manuales

Sin comentarios

Digital Voice Systems Net-2000 Especificaciones Pagina 42

Comentarios a estos manuales