Patent ID: 8413197
Filing Date: 2013-04-02
Classification: H04N

Abstract:
1. A key frame delivery method of selecting key frames of a video file by a video delivery server connected over a network to a client device, where the video file is stored on a storage device, the key frame delivery method comprising the steps of: a) storing on the storage device, for each of the respective key frames included in the video file, key frame information including a key frame number that identifies the respective key frame, offset from the beginning of the video file, a relative delivery time of the key frame from the beginning of the video file in a case of delivering the video file at normal play and a size of the key frame; b) determining a cycle delivery time t c) acquiring a key frame relative delivery time i d) acquiring a key frame relative delivery time i e) selecting, at the video delivery server, a key frame l f) transmitting the selected key frame l g) incrementing the cycle number k; and h) repeating steps b) through g), wherein said |t wherein said |i