METHOD AND SYSTEM FOR INDEXING AND CONTENT-BASED ADAPTIVE STREAMING OF DIGITAL VIDEO CONTENT

摘要

The present invention discloses systems and methods for automatically parsing digital video content into segments corresponding to fundamental semnatic units, events, and camera views, and streaming parsed digital video content to users for display and browsing. The systems and methods effectively use the domain-specific knowledge such as regular structures of fundamental semnatic units, unique views corresponding to the units, and the predictable state transition rules. The systems and methods also include scene change detection, video text recognition, and view recognition. The results of parsing may be used in a personal video browsing/navigation interface system. Furthermore, a novel adaptive streaming method in which quality levels of video segments are varied dynamically according to the user preference of different segments is disclosed. Important segments are transmitted with full-motion audio-video content at a high bit rate, while the rest is transmitted only as low-bandwidth media (text, still frames, audio).