Abstract: In one example embodiment, a data processing apparatus includes a database that stores purchase history information; and a processor that causes a user device to display a list of at least one purchased item and a selectable re-sell button to re-sell each purchased item. The processor provides the selectable re-sell button after a certain period of time, based on predetermined criteria, from time of the purchase of the at least one item. When the selectable re-sell button is selected, the processor provides the user device with a user interface to input information about the purchased item, and the user interface includes multiple input fields of which at least one of the multiple input fields is suggested by the processor based on the purchase history information stored in the database.

Abstract: The speech signal of one speaker in a plurality of signals of speakers can be isolated and recognized by using non-linear oscillators which lock on the fundamental and harmonic frequencies of the one speaker, whereby extraction of the one speaker's signals and speech recognition is done.