Abstract: In the system of artificial intelligence technology, computer vision and image recognition, speech recognition and speech synthesis, natural language processing belong to the basic functional technology. They have been studied and applied to intelligent robots, automatic driving, intelligent medical treatment, intelligent security and other products and fields. They are the closest to the product-oriented development of artificial intelligence technology so far. Based on the global and domestic patent search of the above three kinds of technologies, and the reading of a large number of patent documents, this paper makes a thorough study on the current situation, characteristics and future evolution trend of patent distribution, compares the differences of patent distribution among high-tech enterprises in relevant countries, and hopes that the research results will provide reference in technical research and intellectual property distribution for domestic enterprises.

Key words: artificial intelligence, computer vision and image recognition, speech recognition, speech synthesis, natural language processing