Institut Fur Rundfunktechnik Gmbh

Institut Fuer Rundfunktechnik Gmbh

Alexander Erk

Jens Groh

Robert Sedlmeyer

Klaus Merkel

Matthias Hammer

Sebastian Kilger

Mark Gulbahar

Mark GÜLBAHAR

In a peer-to-peer (P2P) system, in each individual transmitting peer (), the incoming data stream is divided logically and with regard to time into different parts, which are buffered in a volatile memory () and are transmitted to the receiving peers () on different paths by means of a peer-to-peer transmission mechanism (). In a receiving peer (), the received parts of the subdivided data stream are buffered in a volatile memory () and are reassembled into a complete data stream. Further, in the receiving peer (), the parts of the subdivided data stream, buffered by the volatile memory (), are copied into a persistent memory (), from where they are copied back into the volatile memory () at a later point in time if necessary. A fraction of the received data is excluded from persistent storing by selecting parts of the subdivided data stream.

Peer-to-peer transmission system for data streams

The aim of the invention is to indicate the availability of an update for an MHP application, which is modified only periodically, to the user of a set top box, while helping him or her to decide whether the modified update is actually required and optionally still maintaining the availability of the older update without restrictions. To achieve this, information concerning the scope and/or type of modification in relation to the older version is provided in the transmitted version number for the modified MHP application. The set top box starts the saved older version if special information exists ('launchable with older version' flag) and permits a comparison of the version number with the received version number of the modified MHP application as to whether the modifications of the modified MHP application are of such significance that the modified version must be received and saved in the cache memory. If an update of the cache memory is required, the user of the set top box receives an indication to switch to the narrow-band transponder channel and to receive the modified MHP application.

Method for controlling set top boxes and set top box that can be controlled by said method

Growing community of inventors

Ismaning, Germany

Alexander Erk