
PSB 7230
Firmware Features
Semiconductor Group
144
Data Sheet 1998-07-01
*:
P(1-0) bits are autoincremented in outband controlled mode. Thus, OPT1 does not
need to be explicitly written for each 10 ms packet! If P(1-0) bits are written to the JADE
which don’t match the corresponding status bits, they will be ignored.
#Data Bytes means the number of compressed data bytes transmitted from the User to
the JADE AN or from the JADE AN to the User, respectively. The uncompressed data is
exchanged constantly with 80 samples in 10 ms (8 kHz).
6.2.2
The uncompressed data protocol is quite simple. The default configuration is 8 kHz
sampling rate and 16-bit linear data. The data format can be selected to be either 16-bit
linear or 8-bit PCM (G.711 A-/
μ
-law). For a 10 ms framing the size of the uncompressed
data (in bytes) is listed in the table below:
Uncompressed Data Protocol
Note:
I
ndependently of the interface selection for the uncompressed audio, always the
most significant bit of the most significant byte is transferred first, e.g. 16-bit linear
samples are split up into two bytes and the most significant bit of the most
significant byte is transferred first (big endian).
38
06
00
8
06
00
0
Part 0 of 30 ms frame
39
06
08
8
06
00
0
Part 1 of 30 ms frame
40
00
10
8
06
00
0
Part 2 of 30 ms frame,
Command: Neutral Mode,
last G.723 data to JADE
AN
–
41
00
00
0
06
00
0
42
00
00
0
06
00
0
Last G.723 decoded data
from JADE AN
4th neutral packet, next
can change mode
43
00
00
0
00
00
0
16-bit linear
160
G.711 A-/
μ
-law
80
8 kHz sampling rate
Table 26
Packet#
(10 ms)
Control/Status Pipeline for G.723
(cont’d)
Control (User to
JADE AN)
MODE OPT1* #Data
Bytes
Status (JADE AN to
User)
MODE OPT1 #Data
Comment
Bytes