Patent ID: 7672524
Filing Date: 2010-03-02
Classification: H04N

Abstract:
1. A method for scalable image transcoding, comprising an encoder for performing steps of the method, comprising the step of: analyzing an encoded input bitstream of an image to obtain a structure of the encoded input bitstream, in which the image includes a region-of-interest and a background region, and in which the encoded input bitstream is a stream of packets, in which a number of packets in each subset of packets are determined according to an allocated variable bit rate T determining a first quality value for the region-of-interest and a second quality value for the background region; and composing an encoded output bitstream from a subset of the packets selected from the encoded input bitstream according to the structure, in which the subset of packets includes a first set of packets corresponding to the region-of-interest having the first quality value, a second set of packets corresponding to the background region and having second quality value, and empty packets.