AMBE-3000F™ Vocoder Chip Users Manual
Version 3.4, April, 2014
Dat
a and Configuration Packets
samples dcmode ecmode
0x15 Reserved (bits set to 0)
See Table 62
PKT_CHANFMT Data
Settings
Table 61 PKT_CHANFMT Field
NOTE: All Reserved data bits in the PKT_CHANFMT Field (bits 6 through bit 15) must be set to 0 in
order to avoid unexpected results.
Options for PKT_CHANFMT Field
Description Value
ecmode bit 1 bit 0
Output Channel packets never contain ecmode field 0 0
Output Channel packets always contain ecmode field 0 1
Output Channel packets only contain ecmode field when changed 1 0
Reserved 1 1
dcmode bit 3 bit 2
Reserved 0 0
Reserved 0 1
Reserved 1 0
Reserved 1 1
samples bit 5 bit 4
Output Channel packets NEVER include the number of samples used
in the current frame.
0 0
Output Channel packets ALWAYS include the number of samples
used in the current frame.
0 1
Output Channel packets include the number of samples used in the
current frame ONLY WHEN IT IS DIFFERENT FROM THE LAST
FRAME.
1 0
Output Channel packets include the number of samples used in the
current frame ONLY WHEN THE NUMBER OF SAMPLES DOES
NOT EQUAL 160.
1 1
Table 62 PKT_CHANFMT Data Settings
PKT_CHANFMT Response field (1 byte) this field indicates the output channel packet format has been changed.
PKT_CHANFMT Response Field - Format
Field Identifier Response Field Data
1 Byte 1 Byte
0x15
0x00
(anything different indicates error)
Table 63 PKT_CHANFMT Response Field
PKT_SPCHFMT field (3 bytes total) this field will set the format of the Speech packets output from the AMBE-3000F™
Vocoder Chip
(Subject to Change) Page 69
DVSI CONFIDENTIAL PROPRIETARY
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