isd-t360sb ETC-unknow, isd-t360sb Datasheet - Page 45
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isd-t360sb
Manufacturer Part Number
isd-t360sb
Description
Manufacturer
ETC-unknow
Datasheet
1.ISD-T360SB.pdf
(112 pages)
- Current page: 45 of 112
- Download datasheet (2Mb)
2—SOFTWARE
2.2.3
SUPPORTED FUNCTIONALITY
The VoiceDSP processor supports analog and dig-
ital telephony in various configurations. For analog
telephony the VoiceDSP operates in master
mode, where it provides the clock and the syn-
chronization signals. It supports a list of single
channel and dual channel codecs, as listed in
Table 1-6. For digital telephony the VoiceDSP op-
erates in slave mode, where the control signals
are provided by an external source.
The codec interface is designed to exchange
data in short frame format as well as in long frame
format. The channel width may be either 8 bits (u-
Law format or A-Law format), or 16 bits (linear for-
mat). In slave mode the clock may be divided by
two, if required (two bit rate clock mode).
The VoiceDSP processor supports up to 2 voice
channels, where the line should be connected as
channel 0 (in master mode or in slave mode - de-
pends on the configuration), and the speaker-
phone (speaker and microphone) should be
connected as channel 1 or as channel 2, de-
pends on the configuration (channel 2 is always
connected as master).
See “The Codec Interface” on page 1-9, for de-
tailed description of the supported codec devic-
es and the hardware connectivity.
Use the CFG command to define the codec
mode (master or slave), the data frame format
(short or long), the channel width (8 bits or 16 bits),
the clock bit rate (single or dual) and the number
and type of codecs (one or two, single channel or
dual channel). See “CFG Configure VoiceDSP
config_value” on page 2-26.
DATA CHANNEL TIMING
To provide additional flexibility (e.g., when using
speakerphone), the codec interface provides a
programmable delay of data and synchroniza-
tion signals, relative to the CFS0 signal.
ISD
CODEC INTERFACE
Refer to tunable parameters index 65 to index 69,
in Table 2-11, for detailed description of the delay
registers and their significance.
2.3
This section provides details of the VoiceDSP algo-
rithms and their principle operation. It is divided
into the following subjects:
•
•
•
•
•
•
VCD (Voice Compression and
Decompression)
DTMF Detection
Tone and Energy Detection (Call Progress)
Speakerphone
Speech Synthesis
SW Automatic Gain Control
ALGORITHM FEATURES
ISD-T360SB
2-9
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