Digital Voice Systems Net-2000-P25, Руководство пользователя

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Net-2000™ Voice Codec Unit
User’s Manual
Page 28
DVSI Confidential Proprietary
Section 4 – Net-2000™ VCU Interface Protocol
Reset Packet
The Reset packet is used to reset the encoder and decoder state when the VCU is in File Mode. In
order to get reproducible, bit-exact results in File Mode the state of the vocoder must be reset before
sending Channel or Voice packets to the VCU.
Reset Packet
Bytes
(msb-lsb)
Bit
7 6 5 4 3 2 1 0
Bit
7 6 5 4 3 2 1 0
Parameter Name
0 – 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 len
2 – 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 type
H
e
a
d
e
r
4 – 5 x x x x x x x x x x x x x x x x seq
6 – 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x which
Table 18 Reset Packet
Reset packets have the following format described Table 18 and C-language data structure below:
struct reset_packet_t {
short len;
short type;
short seq;
short which;
};
The size of the Reset packet is eight bytes. The elements of the Reset packet are described in
detail in the following sections.