User interface, system, and method for automatically labelling phonic symbols to speech signals for correcting pronunciation

A user interface for automatically labeling speech signals with phonic symbols for correct pronunciation, comprising:

• Waveform graphs, obtained by analyzing the sound signals;
• Intensity variation graphs, obtained by analyzing the sound signals;
• Pitch variation graphs, obtained by analyzing the sound signals;
• Multiple pronunciation intervals on the waveform, intensity variation, and pitch variation graphs, where each interval corresponds to a phonic symbol and is bounded by two partitioning line segments;
• and
• Phonic symbol labeling areas, which display the phonic symbols corresponding to the pronunciation intervals.

A system for automatically labeling speech signals with phonic symbols to correct a language learner's pronunciation, comprising:

• An input device, to input a text string and a corresponding sound signal;
• An electronic phonetic dictionary, which is used to look up the string of phonic symbols that correspond to a text string;
• An audio cutter that partitions the sound signals into multiple frames. The frames may be overlapping;
• A feature extractor, which extract a set of features from each frame;
• A phoneme-feature database, including multiple phoneme clusters, where each of the phoneme clusters corresponds to a phonic symbol;
• A phonic symbol labeler, which labels intervals of a speech signal with phonic symbols;
• and
• An output device, which displays a waveform graph, a pitch variation graph, an intensity variation graph and phonic symbols corresponding to each pronunciation interval of the input sound signals.