APPARATUS FOR ASSIGNING AND ASSESSING TRANSMISSION SYMBOLS WHEN TRANSMITTING PARTIAL STREAMS OF DIFFERENT SIGNIFICANCE

摘要

An apparatus for assigning transmission symbols to a media data stream of information symbols is described, said media data stream encompassing a first partial stream for representing a media content at a basic quality and a second partial stream including additional data for representing the media content along with the first partial stream at an improved quality. The apparatus comprises a first device for assigning first transmission symbols to the information symbols of the first partial stream and a second device for assigning second transmission symbols to the information symbols of the second partial stream, the first transmission symbols being transmissible via a transmission channel having a lower error probability than the transmission channel via which the second transmission symbols can be transmitted.