| According to infant experts’studies, emotional expression of infant is not only the primary way to communicate with the world, but also the important information source of the physiological and psychological needs, the mental health status, and intelligence development level. Recently, the research on infant emotional information has already drawn scholar’great attention extremely and has become the newly emerging and focusing field.The previous researches show that the infant speech information is the most facilitate way to collect and reflect the baby-special language movement fashion and emotional expression characteristics, which has been general concern to researchers. However, there is no unified infant emotional information classified method and corresponding language description, especially for the infant emotion of laughter and crying with rich emotional information, with no uniform views to recognition and understanding of its significance.Based on the experience in contacting with an infant, I explored the research on the issue mentioned above using the pattern recognition technique. Firstly, through analysis on structure of infant vocal organs, combined with the infant physiological and psychological needs and its surrounding conditions, infant emotional classification and relevant language speech information were analyzed Secondly, as for the infant voice information, data collection, preprocess and feature parameters identification are discussed based on technical parameters such as LPC, LPCC and MFCC. Furthermore, the study explored and compared the feasibility of the methods of identifying infant emotional information such as ANN, HMM and DTW and so on. By the comprehensive comparison, I did research on emotional information pattern recognition of the three typical states, that is, happiness, hunger and sleepiness, by MFCC and DTW. In addition, its technique realization method and test result with a good recognition effect were elaborated in detail in the paper. The research result in the paper will provide an important exploratory inspiration for the research work of related fields. |