The invention relates to the technical field of
speech recognition, in particular to a Chinese learner-oriented tone evaluation and improvement method, which comprises the following steps of: extracting a
fundamental frequency F0 curve and sound channel parameters of a speech
signal, constructing a turbid and clear adaptive fusion model, and fusing to generate
fundamental frequency related characteristics and
fundamental frequency unrelated characteristics; constructing a tone error corpus, carrying out tone classification labeling, generating a multi-level tone
feature set through a turbid and clear adaptive fusion model, aligning a voice
signal with a reference voice
time domain, and extracting and decoupling a tone shape
feature vector and a tone domain
feature vector; and based on the decoupled feature vectors, establishing a dual-channel evaluation path, hierarchically calculating the tone type distance and the tone domain distance of the tones, carrying out weighted fusion, generating a final evaluation
score, and finally generating feedback information for the Chinese learner. According to the method, a
complete method from feature decoupling to two-channel evaluation is constructed, the pronunciation problem of the learner is quantitatively diagnosed, and the pertinence and efficiency of Chinese tone learning are improved.