Patent ID: 7072366
Filing Date: 2006-07-04
Classification: G10L,H04N

Abstract:
1. Scalable encoder for encoding a media signal, said encoder comprising a core encoder for producing a first data stream, which is a core data stream relating to the media signal, having a first bit-rate, an enhancement encoder for producing a second data stream, which comprises at least one enhancement data stream relating to the media signal, said at least one enhancement data stream having a second bit-rate, a multiplexer for combining at least the first data stream and the second data stream into a third data stream, and a controller arranged to receive control information, to determine a target ratio of bitrates of the first data stream and the second data stream in the third data stream according to the control information and to adjust the combination of the first data stream and the second data stream in the third data stream by adjusting the first and the second bit-rates so as to maintain the ratio substantially constant.