Institut Fur Rundfunktechnik Gmbh

Matthias Laabs

Matthias Hammer

Markus Berg

Andreas Metz

Aylin Vogl

Sonja Langhans

Herbert Guist

Siegfried Hauzeneder

An information-signal (e.g., video-stream of certain quality) (SB1.1, SB1.2, SB1.3, . . . ) is split into two or more (Multicast-) sub-data-streams and transmitted via different channels (CH1,CH2). Thereby, on switching over of two information-signals, seamlessly switch over to another information-signal (e.g., from SD to HD quality) is enabled (in particular at the GOP-boundary in case of video).

Method for transmitting and receiving of an information-signal via a network, transmitter and receiver for application of method and splitter unit for application within the network

A method for data packets transmission includes a first group of data packets transmitted with a first bitrate, this first group including a first payload. Quality of transmission of the first group of data packets is checked and, if it is above a first threshold, a second group of data packets is transmitted with a second bitrate higher than the first bitrate. The second group of data packets includes a payload, and additional control data (C) allowing a receiver to check consistency of the delivered payload.

Method and system for controlling data packet transmissions over lossy protocols

An apparatus () for switching real-time media streams of one or multiple sources (Q, Q, Q) to one or multiple sinks (S, S, S) includes one or multiple source ports (QA, QA, QA) for connecting of the one or multiple sources (Q, Q, Q) as well as one or multiple sink ports (SA, SA, SA) for connecting of the one or multiple sinks (S, S, S). The apparatus () is adapted to provide a switching sink (S) and to switch it to a real-time media stream of a first source (Q). The switching sink (S) is adapted to receive the real-time media stream of the first source (Q) in a packet-switched format and to forward the received real-time media stream in a packet-switched format, wherein the packets are provided with a first multi-point destination address (IPMZ) allocated to the switching sink (S) during forwarding in order to allow for a connecting of the one or multiple sinks (S) with the real-time media stream of the first source (Q) forwarded by the switching sink (S). The switching sink (S) represents the source of the real-time media stream forwarded by the switching sink (S) from the 'point of view' of the sinks (S, S, S) connected to the apparatus, with which the sinks (S, S, S) can connect through the multi-point destination address (IPMZ).

Apparatus and method for switching real-time media streams

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Munich, Germany

Matthias Laabs