Abstract: A method for sending first data as quantum information in qubits and classical second data over a quantum channel, in particular in quantum information communication systems, includes applying quantum error correction (QECC) encoding to the qubits obtaining quantum information codewords, applying intentional errors with error syndromes representing the second classical data to the quantum information codewords obtaining quantum information codewords with intentional errors applied upon, transmitting from a transmitting side the quantum information codewords with intentional errors applied upon over the quantum channel which outputs received codewords at a receiving side, computing error syndromes from the received codewords, performing a QECC error correction operation on the received codewords by applying a correction operator obtained at least by the computed syndromes to obtain corrected codewords, and outputting the corrected codewords and the computed syndromes.

Abstract: Method for sending first data as quantum information in qubits (I?>) and classical second data (Si) over a quantum channel (12; 12a; 12b), in particular in quantum information communication systems (10; 10a; 10b), which includes applying QECC encoding (111) to said qubits ((I?>) obtaining quantum information codewords (I?>), wherein said method (200; 300) includes applying (210) intentional errors (Pi) with error syndromes (Si) representing said second classical data to said quantum information code-words ((I?>) obtaining quantum information codewords with intentional errors (P1) applied upon (PiI?i>), and transmitting (220) from a transmitting side (11; 11a; 11b) said quantum information codewords with intentional errors applied upon (PiI?i>) over said quantum channel (12; 12a) which outputs received codewords (PiI?i>;EiPiI?i>) at a receiving side (13; 13b), computing (230; 330) error syndromes (Si,Ri) from said received codewords (PiI?i>;EiPiI?i>), performing a QECC error corre

Abstract: Coding a data stream is provided, wherein the data stream comprises at least one packet having a given packet length and respective partitions of the at least one packet are coded with different error protection rates, the respective lengths of the respective partitions being determined by respective predetermined percentages of the packet length or a fraction of the packet length.

Abstract: Coding a data stream is provided, wherein the data stream comprises at least one packet having a given packet length and respective partitions of the at least one packet are coded with different error protection rates, the respective lengths of the respective partitions being determined by respective predetermined percentages of the packet length or a fraction of the packet length.

Abstract: Coding a data stream is provided, wherein the data stream comprises at least one packet having a given packet length and respective partitions of the at least one packet are coded with different error protection rates, the respective lengths of the respective partitions being determined by respective predetermined percentages of the packet length or a fraction of the packet length.

Abstract: Respective error detection codes (CRC) are selectively added to respective source coded signal parts depending on the type of source coded signal part. Further, important source coded signal parts may be provided with respective error detection codes, whereas less important source coded parts are not provided with error detection codes. If the source coded signal comprises source coded packets, the error detection codes (CRC) may relate to a part of given source coded packets (p2), e.g. a header (H).

Abstract: Coding a data stream is provided, wherein the data stream comprises at least one packet having a given packet length and respective partitions of the at least one packet are coded with different error protection rates, the respective lengths of the respective partitions being determined by respective predetermined percentages of the packet length or a fraction of the packet length.

Abstract: Respective error detection codes (CRC) are selectively added to respective source coded signal parts depending on the type of source coded signal part. Further, important source coded signal parts may be provided with respective error detection codes, whereas less important source coded parts are not provided with error detection codes. If the source coded signal comprises source coded packets, the error detection codes (CRC) may relate to a part of given source coded packets (p2), e.g. a header (H).

Abstract: Coding a data stream comprising: channel coding (11) respective partitions of a given part of the data stream with different error protection rates to obtain a coded data stream (WS1), and including (20, 14) length information (lf) concerning respective lengths of the respective partitions in the coded data stream (WS1).

Abstract: Coding of a data stream is provided, the data stream comprising at least one marker out of a predetermined set of at least two mutually different markers, the marker indicating a start of a given part of the data stream, wherein the at least one marker is represented with a higher-robustness word having a higher robustness to channel errors than the at least one marker, e.g. a pseudo-noise word. Advantageously, the higher-robustness word representing the at least one marker is obtained from a predetermined set of higher-robustness words, each higher-robustness word in the predetermined set of higher-robustness words corresponding to a given marker in the predetermined set of markers.

Abstract: Coding a data stream is provided, wherein the data stream comprises at least one packet having a given packet length and respective partitions of the at least one packet are coded with different error protection rates, the respective lengths of the respective partitions being determined by respective predetermined percentages of the packet length or a fraction of the packet length.