Channel [192]; Table 27 Channel Parameters - Digital Voice Systems Net-2000 User Manual

Net-2000™ Voice Codec Unit
User's Manual

channel [192]

For simplicity, and since channel data packets are small compared to nominal Ethernet frames all
192 Channel Data bytes are ALWAYS transmitted regardless of the actual bit-rate of the vocoder.
Each byte of the channel [] array contains one channel data "bit".
Channel [192]
Bytes
(msb-lsb)
...
28 - 29
30 – 31
32 – 33
...
216-217

Table 27 channel parameters

If channel[] contains hard decision data (no soft decision error detection)
channel[i] == 0x01 is a one,
channel[i] == 0x00 is a zero
If 8 bit soft decision error detection is used then,
channel[i] == 0xff is the most confident one
channel[i] = 0x00 is the most confident zero
Other values for the number of soft-decision bits are coded in a similar manner. For transmitting DTX
frames a channel data packet must contain all ones in the channel[] array. To signal no data and
force a frame repeat the channel[] array data packet must contain all zeros.
DVSI Confidential Proprietary
Bit
7 6 5 4 3 2 1 0
...
X x x x x x x x
X x x x x x x x
X x x x x x x x
...
X x x x x x x x
Bit
7 6 5 4 3 2 1 0
...
x x x x x x x x
x x x x x x x x
x x x x x x x x
...
x x x x x x x x
Section 3 – Net-2000™ VCU Control
Parameter Name
...
channel [0-1]
channel [2-3]
channel [4-5]
...
channel [191-192]
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