Navigation apparatus

• US 20060074661A1
• Filed: 09/27/2004
• Published: 04/06/2006
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Kabushikikaisha Equos Research
• Original Assignee: Kabushikikaisha Equos Research
• Inventors: Ito, Yasuo, Sugawara, Takashi, Muramatsu, Ryuya, Zeng, Jianwu, Takaichi, Toshio
• Granted Patent: US 7,310,602 B2
• Time in Patent Office: Days
• US Class Current: 704/252
• CPC Class Codes: G10L 15/08 Speech classification or search
• CPC Class Codes: G10L 15/22 Procedures used during a speech recognition process, e.g. man-machine dialogue
• CPC Class Codes: G10L 2015/088 Word spotting

Abstract

In this navigation apparatus, when speech recognition of inputted speech is carried out, keywords included in the content of the recognized speech are searched from a dictionary DB, and then these words are displayed as keywords of a POI search. When a correction of a keyword is required by the user, because most errors occur in the first phonetic symbol of the misrecognized word, a search of words each having phonetic symbols in which the first phonetic symbol of the misrecognized word is changed from the phonetic symbols of the word to be corrected (i.e., a search of words having one different first phonetic symbol) is carried out to present candidates for correction. In this navigation apparatus, because the displayed candidates for correction are limited to words having a different first phonetic symbol which has a high possibility of being the cause of misrecognition, the user can correct the misrecognized keyword by a simple operation. Further, it is possible to reduce the process burden as compared to the conventional misrecognition correction processes.

Claims

1. A navigation apparatus, comprising:

storage means which stores keywords related to geographical points and their phonetic symbols;

speech recognition means for recognizing the content of speech;

word displaying means which displays words contained in the content of the recognized speech and matched with the keywords stored in the storage means;

search means for searching, in the case where correction is required for one of the displayed words, words each having phonetic symbols in which the first phonetic symbol thereof is different from the first phonetic symbol of the phonetic symbols of the word to be corrected;

candidates presenting means for presenting the searched words as candidates for correction;

result acquiring means for acquiring the word selected from the candidates for correction and words contained in the displayed words other than the selected word as a recognition result; and

geographical point search means for carrying out a geographical point search based on the words of the recognition result.

2. The navigation apparatus as claimed in claim 1, wherein the word displaying means converts the content of the speech into text data, extracts keywords from the text data that can be used for a POI search, and then displays words that are matched with the keywords.

3. The navigation apparatus as claimed in claim 1, wherein the candidates presenting means displays the candidates for correction in alphabetical order.

4. The navigation apparatus as claimed in claim 1, wherein the candidates presenting means displays the candidates for correction in the form of a list determined by considering the frequency or history of previous selections.