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Semiconductor
MSM6679A-110 Voice Recognition Processor
43
Record (Continued)
SD Recognition Control
Opcode
FA3Dh ~
FAFFh
Action
Return Value
—
—
Reserved. These commands are reserved for
future use.
Opcode
Recognition performance is largely a function of how well the enrollment data represents subsequent tokens of the
enrolled utterances, and performance generally improves steadily with each additional enrollment pass. For most
applications, three initial enrollment passes are recommended. Subsequent reference updating can be performed
with the SD Recognize Update command (F342).
Clear SDR table. This command initializes a
blank SD template table. The 2684-byte area
from the address set by the F103 command
(the working SDR table) is set to zeros. The
SDR tables in the FLASH banks are not af-
fected. The default is (4A00 - 547B).
Set SD Segment Pointer. This command sets
the SD segment pointer to XY00h, i.e., set the
starting address of the current SD recognition
parame-ter table to XY00h. Issuing this
command is equivalent to issuing the Set SD
Origin command, F103h XY00h. (For further
details of operation, please refer to the
description of that command.)
Action
Return Value
F521h
SDR table is cleared
F501h
F6XYh
No return value.
Utterance number found.
F740h
F9XYh
Utterance number not found.
F700h
Search for SD Utterance XY. This is the first
step in adding an utterance to the vocabulary,
or in replacing an existing one. The SD
vocabulary memory is searched for utt. no.
XYh. If it is not found and if sufficient SD
memory exists, the MSM6679A prepares to
add utterance number XYh to the vo-cabulary.
Memory full.
F73Fh
Operation complete.
F740h
Aborting SD Listen mode.
F700h
FB00h
Improper level, must repeat.
F73Eh
Enroll SD Utterance. This command starts
MSM6679A SD Listen mode, then uses the
next captured utterance to start or update
training of the reference data for SD utterance
number XY specified in the most recent Search
command (F9XYh). The user must be
prompted to say the utter-ance prior to issuing
this command.
If the utterance was previously enrolled, a
training update is performed; if not, the
reference data is initialized. Each utterance in
the SD vocabulary must be enrolled at least
once before it can be recognized.
Invalid signal processing table.
F802h
Sample data overrun.
F840h
FC00h
Operation complete.
F740h
Erase utterance from SD vocabulary. This
command erases the reference parameters for
utterance number XYh from the SD vocabulary,
where XYh is the utterance number retained
from the previous Search command (F9XYh).