Patent ID: 11928117
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 8:
9. A computer system comprising a computer processor coupled to a computer-readable memory unit, the memory unit comprising instructions that when executed by the computer processor implements a method comprising:
obtaining a plurality of live comments for a video, the plurality of live comments being associated with a plurality of fragments in the video, respectively;
classifying each live comment of the plurality of live comments into a topic of a plurality of topics associated with the video;
extracting a plurality of features from the plurality of live comments, respectively, wherein the plurality of features comprises a text feature for representing a text of a particular live comment, a time feature for representing a time point of a fragment in the video when a particular live comment is submitted, and a time relevance feature for representing a time relationship between a first live comment and a second live comment in the plurality of live comments;
generating a knowledge base for the plurality of live comments based on the plurality of features, wherein the knowledge base acts as a searchable index for the plurality of live comments, wherein generating the knowledge base comprises:
generating a graph based on the plurality of features, the graph including: a plurality of nodes respectively corresponding to the plurality of live comments and a plurality of edges among the plurality of nodes;
dividing the graph into at least one subgraph based on the plurality of nodes and the plurality of edges; and
building at least one knowledge model that is included in the knowledge base based on the at least one subgraph; and

in response to detecting that a further live comment has been inputted by a user and includes a question regarding a live comment of the plurality of comments or the video, identifying a respective topic of the plurality of topics of the further live comment and searching the knowledge base for an answer to the question based on the topic.