| 摘要 |
Selected objects may be located by pushing a button on a keypad of a base unit, or by giving an oral command thereto. A receiver microprocessor, loaded with a unique electronic address, is attachable to each object. A base unit PROM is loaded with a library of digitized voice command templates. A user's command to find a lost object is received by a microphone, and digitized. The digitized command is compared with the templates using pattern recognition algorithms, which may utilize a Hidden Markov Model. When matched, the base unit processor causes radio transmission of RF interrogation packets targeted at the unique address corresponding to the lost object. A receiver chip detects the interrogation packets, and compares the transmitted unique address with the address stored in its microprocessor. Where matched, the microprocessor modulates a sounding device to direct the user to the lost object. The voice command templates can be preset for speaker independent operation or can be customizable for speaker dependent operation.
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