Voice query extension method and system

At least one non-transitory computer-readable medium comprising computer readable instructions, that when executed, implements a voice query extension method, comprising:

• detecting a voice activity of a user from an input signal and extracting a feature vector from the voice activity using a computer;
• converting the feature vector into at least one phoneme sequence and generating the at least one phoneme sequence;
• matching the at least one phoneme sequence with words registered in a language dictionary, extracting a string of the matched words with a linguistic meaning, and selecting the string of the matched words as a query;
• determining whether the query is in a predetermined first language, and when the query is not in the first language as a result of the determining, converting the query using a phoneme to grapheme rule, and generating a query in the first language;
• and
• searching using the query in the first language.

A voice query extension system, comprising:

• a signal processing unit to detect a voice activity of a user from an input signal and extracting a feature vector from the voice activity using a computer;
• a phonetic decoder to convert the feature vector into at least one phoneme sequence and to generate the at least one phoneme sequence;
• a lexical decoder to match the at least one phoneme sequence with words registered in a dictionary, to extract a string of the matched words with a linguistic meaning, and to select the string of the matched words as a query;
• a multilingual query extension unit to determine whether the query is in a predetermined first language, and when the query is not in the first language as a result of the determining, to convert the query using a phoneme to grapheme rule, and to generate a query in the first language;
• and
• a search unit to search using the query in the first language.