| 摘要 |
<p>Fast and efficient transferral of video data is achieved by a method comprising segmenting a digital video image into at least a first and second segment. The intra coded frames included in the video stream are identified by an encoder, and the segments are encoded for the intra frames. The first segment is encoded at a first (low) quantisation level, and the second at a second (high) quantisation level. Both segments, encoded at different resolutions, may therefore be transmitted as a single signal. The first image segment provides a high resolution image for objects of interest, while fast transferral of the image as a whole is achieved as the second segment is encoded at a low resolution. Application of the method may include an alarm or security system where rapid transmission of an image is required as well as a high resolution image of the area of interest.</p> |
