RC8650 datasheet(40/48 Pages) ETC

40 / 48 page

RC8650 VOICE SYNTHESIZER

RC SYSTEMS

Punctuation deﬁned in the exception dictionary has priority over the

Punctuation Filter command. Any punctuation deﬁned in the dictionary

will be used, regardless of the Punctuation Filter setting.

Note If the dollar sign character ($) is deﬁned within the text frag-

ment of any exception, currency strings will not be read as dollars

and cents.

CHARACTER MODE EXCEPTIONS

Exceptions are deﬁned independently for the Character and Text

modes of operation. The beginning of the Character mode exceptions

is deﬁned by inserting the letter

C just before the ﬁrst Character mode

exception. No exceptions prior to this marker will be used when the

RC8650 is in Character mode, nor will any exceptions past the marker

be used in Text mode. For example:

(Text mode exceptions)

()=

(optional; used if built in rules are not to be

used in no-match situations)

(Character mode exceptions marker)

(Character mode exceptions)

()=

(optional; used if built in rules are not to be

used in no-match situations)

APPLICATIONS

The following examples illustrate some ways in which the exception

dictionary can be used.

Correcting MispronouncedWords

Correcting mispronounced words is the most common application for

exception dictionaries.

S(EAR)CH=ER

$(OK)$=OW K EY

The ﬁrst exception corrects the pronunciation of all words containing

search (search, searched, research, etc.). As this exception illustrates,

it is only necessary to deﬁne the problem word in its root form, and

only the part of the word that is mispronounced (ear, in this case). The

second exception corrects the word ok, but because of the left and

right contexts, will not cause other words (joke, look, etc.) to be incor-

rectly translated.

No Cussing, Please

The reading of speciﬁc characters or words can be suppressed by

writing exceptions in which no pronunciation is given.

(????)=

(YOU ﬁll in the blanks!)

When Zero Isn’t Really Zero

When reading addresses or lists of numbers, the word “oh” is often

substituted for the digit 0. For example, we might say 1020 North East-

lake as “one oh two oh North Eastlake.” The digit 0 can be redeﬁned

in this manner with the following exception:

(0)=OW

Acronyms and Abbreviations

Acronyms and abbreviations can be deﬁned so the words they repre-

sent will be spoken.

$(KW)$=K IH L AH W AA T

$(DR)$=D AA K T ER

$(TV)$=T EH L AX V IH ZH IX N

String Parsing & Decryption

Sometimes the data that we would like to have read is not available in

a “ready-to-read” format. For example, the output of a GPS receiver

may look something like this:

$GPGGA,123456,2015.2607,N,...

The ﬁrst 14 characters of the string consists of a ﬁxed header and vari-

able time data, which we would like to discard. The following exception

ensures that the header will not be read:

($GPGGA,``````,)=

Note how wildcard tokens are used for handling the time data (8th–13th

characters), since the content of this ﬁeld is variable.

The 15th–16th and 17th–18th characters represent the latitudinal co-

ordinate in degrees and minutes, respectively. The three exceptions

shown below handle the latitudinal component of the GPS string. Note

in the ﬁrst exception how a null text fragment is used in the appropriate

position to generate the word “degrees,” without actually translating

any of the input characters.

,\\()\\.=D IX G R IY Z , ,

(.)=M IH N IH T S , ,

(,N,)=N OW R TH

L AE T IH T UW D

The four exceptions together will translate the example string as “20

degrees, 15 minutes, north latitude.” (Additional exceptions for han-

dling the seconds component, and digits themselves, are not shown

for clarity).

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