Method and device for the generation of a scalable data stream and method and device for decoding a scalable data stream

A method of decoding a scalable data stream of at least two blocks of output data of a first coder and at least one block of output data of a second coder, wherein the scalable data stream comprises a header for the current section of the first coder or the second coder, a block of output data of the second coder after the header, at least one block of output data of the first coder in front of the header and offset information indicating that the at least one block of output data of the first coder, in the direction of transfer from a coding device to a decoding device, is in front of the header, the method comprising:

• reading the at least one block of output data of the first coder;
• reading the output data of the second coder;
• reading the offset information;
• determining that the at least one block of output data of the first coder belongs to the output data of the second coder although the at least one block is in front of the header in the data stream;
• and
• decoding the output data of the second coder and the output data of the first coder to obtain a decoded signal.

A device for producing a scalable data stream of at least two blocks of output data of a first coder and at least one block of output data of a second coder, the device comprising:

• a data stream writer formed to:
• write a header for the current section of the input signal for the first or the second coder;
• write a block of output data of the second coder, in the direction of transfer from a coding device to a decoding device, after the header;
• write at least one block of output data of the first coder, in the direction of transfer, in front of the header;
• and
• write offset information in the scalable data stream indicating that the at least one block of output data of the first coder, in the direction of transfer, is in front of the header.

A device for decoding a scalable data stream of at least two blocks of output data of a first coder and at least one block of output data of a second coder, wherein the scalable data stream comprises a header for the current section of the first coder or the second coder, a block of output data of the second coder after the header, at least one block of output data of the first coder in front of the header and offset information indicating that the at least one block of output data of the first coder, in the direction of transfer from a coding device to a decoding device, is in front of the header, the device comprising:

• a data stream demultiplexer formed to:
• read the at least one block of output data of the first coder;
• read the output data of the second coder;
• read the offset information;
• determine that the at least one block of output data of the first coder belongs to the output data of the second coder although the at least one block is in front of the header in the data stream;
• and
• a decoder for decoding the output data of the second coder and the output data of the first coder to obtain a decoded signal.