SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD

摘要

A signal processing apparatus and signal processing method capable of correctly detecting that a conversation is established even in a daily environment are provided. In signal processing apparatus (100), excitation separation section (130) separates a mixed sound signal in which a plurality of excitations are mixed into the respective excitations. Speech detection section (140) performs speech detection on the plurality of separated excitation signals, judges whether or not the plurality of excitation signals are speech and generates speech section information indicating speech/non-speech information for each excitation signal. Identification parameter extraction section (150) extracts an identification parameter indicating a feature value of a daily conversation based on a plurality of excitation signals or speech section information. Conversation establishment degree calculation section (160) calculates and outputs a degree of establishment of a conversation based on the extracted identification parameter. Conversation partner identifying section (170) judges which excitation is a conversation partner using the degree of establishment of a conversation.