Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Friedrich-alexander-universitaet Erlangen-nuernberg

Friedrich-alexander-universitat Erlangen-nürnberg

Andreas Mull

Heinz Gerhaeuser

Christian Forster

Stefan Doehla

Albert Heuberger

Rainer Hildinger

Prof Heinz Gerhäuser

Dr Gerhäuser

A device for demultiplexing a packet-based transport stream of transport stream packets each provided with a systematic forward error detection code is described. The transport stream packets are each allocated to one of a plurality of data sinks, so that in a payload data section of the transport stream packets allocated to the same data sink a data stream of forward error protection code-protected data packets which are addressed to the respective data sink is embedded. The device determines, for a transport stream packet which is erroneous according to the systematic forward error detection code, a probability value for each of the plurality of data sinks which indicates how probable it is that the predetermined transport stream packet is allocated to the respective data sink, and allocates the predetermined transport stream packet to a selected one of the plurality of data sinks.

Demultiplexing a packet-based transport stream

Exact data-rate analysis of the information signal portions to be transmitted in a subsequent transmission cycle per time-division multiplexing process shall be initially omitted. Instead, on the basis of highly accurate estimated values for the subsequent data rates, estimated values for relative waiting times are transmitted, in a current transmission cycle, from the current time slice to the subsequent time slice of the same service. In the subsequent transmission cycle, actual data rates may be set which may deviate from the estimated data rates for the individual information signals, as a result of which predicted time-slice boundaries for the subsequent transmission cycle may shift. However, the potential shift in the time-slice boundaries is subject to several boundary conditions. No time slice of the subsequent transmission cycle can start prior to its signaled estimated starting time. With constant data rates, the estimated time-slice structure and the actual time-slice structure are identical.

Apparatus and method for transmitting a plurality of information signals in flexible time-division multiplexing

Growing community of inventors

Nuremberg, Germany

Andreas Mull