Method and device for producing a scalable data stream, and method and device for decoding a scalable data stream while taking a bit bank function into account

Device for generating a scalable data stream from one or several blocks of output data of a first encoder and from one or several blocks of output data of a second encoder, wherein the one or the several blocks of output data of the first encoder together represent a number of samples of the input signal for the first encoder, forming a current section of the input signal for the first encoder, and wherein the one block or the several blocks of output data of the second encoder together represent a number of samples of the input signal for the second encoder, wherein the number of samples for the second encoder form a current section of the input signal for the second encoder, wherein the number of samples for the first encoder and the number of samples for the second encoder are equal and wherein the current sections for the first and the second encoders are identical or shifted from each other by a period of time, comprising:

• means for writing a determining data block for the current section of the input signal for the first or the second encoder;
• means for writing output data of the second encoder representing a preceding section of the input signal for the second encoder, in transmission direction from an encoder to an decoder after the determining data block;
• means for writing output data of the second encoder representing the current section of the input signal for the second encoder when the output data of the second encoder for the preceding section of the input signal are written;
• means for writing buffer information into the scalable data stream, wherein the buffer information indicates how far the output data of the second encoder for the preceding section extend beyond the determining data block for the second encoder;
• and
• means for writing the one or the several blocks of output data of the first encoder into the scalable data stream.

Method for decoding a scalable data stream from one or several blocks of output data of a first encoder and from or several blocks of output data of a second encoder, wherein the one or the several blocks o-f output data of the first encoder together represent a number of samples of the input signal for the first encoder, forming a current section of the input signal for the first encoder, and wherein the one block or the several blocks of output data of the second encoder together represent a number of samples of the input signal for the second encoder, wherein the number of samples for the second encoder form a current section of the input signal for the second encoder, wherein the number of samples for the first encoder and the number of samples for the second encoder are equal, and wherein the current sections for the first and the second encoder are identical or shifted to each other by a period of time, wherein the scalable data stream comprises a determining data block for the current section for the first or the second encoder, output data of the second encoder for a preceding section of the input signal in transmission direction after the determining data block, and buffer information, indicating how far the output data of the second encoder for the preceding section extend beyond the determining data block, comprising the following steps:

• reading the determining data block for the current section of the input signal for the first or the second encoder;
• reading the output data of the first encoder for the current section of the first encoder;
• reading the buffer information;
• reading the output data of the second encoder for the current section starting from a position in the scalable data stream indicated by the buffer information;
• and
• decoding the output data of the second encoder and the output data of the first encoder to obtain a decoded signal.

Device for decoding a scalable data stream from one or several blocks of output data of a first encoder and from or several blocks of output data of a second encoder, wherein the one or the several blocks of output data of the first encoder together represent a number of samples of the input signal for the first encoder, forming a current section of the input signal for the first encoder, and wherein the one block or the several blocks of output data of the second encoder together represent a number of samples of the input signal for the second encoder, wherein the number of samples for the second encoder form a current section of the input signal for the second encoder, wherein the number of samples for the first encoder and the number of samples for the second encoder are equal, and

• wherein the current sections for the first and the second encoder are identical or shifted to each other by a period of time, wherein the scalable data stream comprises a determining data block for the current section for the first or the second encoder, output data of the second encoder for a preceding section of the input signal in transmission direction after the determining data block, and buffer information, indicating how far the output data of the second encoder for the preceding section extend beyond the determining data block, comprising:
• a bit stream demultiplexer, adapted to be able to perform the following steps:
• reading the determining data block for the current section of the input signal for the first or the second encoder;
• reading the output data of the first encoder for the current section of the first encoder;
• reading the buffer information;
• reading the output data of the second encoder for the current section starting from a position in the scalable data stream indicated by the buffer information;
• and
• means for decoding the output data of the second encoder and the output data of the first encoder to obtain a decoded signal.