METHOD AND DEVICE FOR THE GENERATION OF A SCALABLE DATA STREAM AND METHOD AND DEVICE FOR DECODING A SCALABLE DATA STREAM

摘要

The invention relates to a method for generating a scalable data stream from at least two blocks of output data from a first encoder (12) and a block of output data from a second encoder (14). The at least two blocks of output data from the first encoder (12) together represent a current section of an input signal in the first encoder (12) and the block of output data from the second encoder represents the same current section of the input signal, whereby a determining data block for the current section of the input signal is written. Furthermore, at least one block of output data from the first encoder (12) in the transmitting direction is written before the determining data block of the current section of the input signal, whereupon offset information is then written in the scalable data stream, which show that the at least one block of output data from the first encoder lies before the determining data block in the transmitting direction. The first scaled layer only can thus be transmitted and decoded with little delay.