Speech input method and system for portable device

A speech input system for a portable device, comprising:

• a multi-lingual unit for determining an acoustic unit for a language mode selected by a user;
• a database for storing data;
• and
• a mapping table for storing a plurality of keywords, providing that a comparison result of at least one speech inputted by said user with said acoustic unit is converted into corresponding keywords therethrough;
• wherein a plurality of selected results are generated by searching said database in response to said corresponding keywords.

A speech input method for a portable device, comprising steps of:

• (a) selecting a language mode and determining an acoustic unit;
• (b) inputting a speech by a user and comparing said speech with said acoustic unit to generate a plurality of recognition results;
• (c) selecting one of said recognition results as a search unit for searching a database so as to obtain a plurality of selected results having said search unit therein;
• (d) repeating step (b) to step (c) so as to narrow a range of said selected results when a next voice is present;
• and
• (e) displaying said selected results in order when said next speech is absent.

A speech input system for a portable device, comprising:

• a multi-lingual unit for determining an acoustic unit for a language mode selected by a user;
• and
• a database for storing data;
• wherein a plurality of selected results are generated by searching said database in response to a comparison result of at least one speech inputted by said user with said acoustic unit.