Speech recognition of character sequences
View Patent ↗A method of and a system for processing speech. A spoken utterance of a plurality of characters can be received. A plurality of known character sequences that potentially correspond to the spoken utterance can be selected. Each selected known character sequence can be scored based on, at least in part, a weighting of individual characters that comprise the known character sequence.
1. A method comprising:
receiving a spoken utterance of a plurality of uttered characters;
determining an identified character sequence by determining corresponding identified characters for individual ones of the plurality of uttered characters;
selecting a plurality of known character sequences that potentially correspond to the identified character sequence; and
for each selected known character sequence, scoring such known character sequence, using a processor, based at least in part on a weighting of individual characters that comprise the known character sequence, wherein scoring the known character sequence comprises:
determining whether a selected character of the known character sequence matches a selected character of the identified character sequence;
when the selected character of the known character sequence matches the selected character of the identified character sequence:
selecting a value that corresponds to the selected character of the known character sequence; and
adding the selected value to a cumulative score associated with the known character sequence; and
when the selected character of the known character sequence does not match the selected character of the identified character sequence:
making no changes to the cumulative score associated with the known character sequence based upon the selected character of the known character sequence.
2. The method of claim 1 , wherein the weighting is based at least in part on frequencies of utterance of the individual characters.
3. The method of claim 1 , wherein the selected value is pre-assigned to the character in a character set.
4. The method of claim 1 , further comprising:
selecting the known character sequence having the highest cumulative score; and
communicating the selected known character sequence having the highest cumulative score to an application that receives recognized speech.
5. The method of claim 1 , wherein selecting the plurality of known character sequences comprises selecting character sequences from a limited set of character sequences.
6. A method comprising:
receiving a spoken utterance of a plurality of uttered characters;
determining an identified character sequence by determining corresponding identified characters for individual ones of the plurality of uttered characters;
selecting a plurality of known character sequences that potentially correspond to the identified character sequence; and
for each selected known character sequence, scoring such known character sequence, using a processor, based at least in part on a weighting of individual characters that comprise the known character sequence, wherein scoring the known character sequence comprises:
for each individual character of the known character sequence, weighting the individual character based on a unigram frequency with which the individual character is known to be uttered, wherein said weighting comprises:
determining whether a selected character of the known character sequence matches a selected character of the identified character sequence; and
when the selected character of the known character sequence matches the selected character of the identified character sequence:
selecting a value that corresponds to the selected character of the known character sequence; and
adding the selected value to a cumulative score associated with the known character sequence; and
when the selected character of the known character sequence does not match the selected character of the identified character sequence:
making no changes to the cumulative score associated with the known character sequence based upon the selected character of the known character sequence.
7. The method of claim 6 , wherein the selected value is pre-assigned to the character in a character set.
8. The method of claim 6 , further comprising:
selecting the known character sequence having the highest cumulative score; and
communicating the selected known character sequence having the highest cumulative score to an application that receives recognized speech.
9. The method of claim 6 , wherein selecting the plurality of known character sequences comprises selecting character sequences from a limited set of character sequences.
10. A non-transitory computer-readable storage medium having computer-usable program code that, when executed, performs a method comprising:
receiving a spoken utterance of a plurality of uttered characters;
determining an identified character sequence by determining corresponding identified characters for individual ones of the plurality of uttered characters;
selecting a plurality of known character sequences that potentially correspond to the identified character sequence; and
for each selected known character sequence, scoring such known character sequence, based at least in part on a weighting of individual characters that comprise the known character sequence, wherein scoring the known character sequence comprises:
determining whether a selected character of the known character sequence matches a selected character of the identified character sequence;
when the selected character of the known character sequence matches the selected character of the identified character sequence:
selecting a value that corresponds to the selected character of the known character sequence; and
adding the selected value to a cumulative score associated with the known character sequence; and
when the selected character of the known character sequence does not match the selected character of the identified character sequence:
making no changes to the cumulative score associated with the known character sequence based upon the selected character of the known character sequence.
11. The non-transitory computer-readable storage medium of claim 10 , wherein the weighting is based at least in part on frequencies of utterance of the individual characters.
12. The non-transitory computer-readable storage medium of claim 11 , wherein the frequencies of utterance are unigram frequencies.
13. The method of claim 10 , wherein the selected value is pre-assigned to the character in a character set.
14. The non-transitory computer-readable storage medium of claim 10 , wherein the method further comprises:
selecting the known character sequence having the highest cumulative score; and
communicating the selected known character sequence having the highest cumulative score to an application that receives recognized speech.
15. The non-transitory computer-readable storage medium of claim 10 , wherein selecting the plurality of known character sequences comprises selecting character sequences from a limited set of character sequences.