FIELD: physics, communications.
SUBSTANCE: invention relates to transmission of a media stream over an error-prone digital video broadcasting - handheld (DVB-H) channel in which media datagrams are labelled according to a priority, packed in a multiprotocol encapsulation section, unequally protected using forward error-correction codes packed into a traffic stream and transmitted into the channel using packets with time-division. A system and a method are proposed for transmitting a multiplexed service stream over a DVB-H channel. Media IP packets are priority labelled. For each packet with time division, the IP packets are grouped based upon the priority labels. Multi protocol encapsulation - forward error correction (MPE-FEC) matrices are made for different priority labels in each packet with time division. Reed-Solomon code data table (RSDT) columns are computed such that the average service bit rate does not overshoot the maximum allowed bit rate, and protection increases with priority. The application data table (ADT) and RSDT of the MPE-FEC matrices are then encapsulated into MPE-FEC sections.
EFFECT: shorter start delay during reception of an unequally protected priority service bit stream.
21 cl, 10 dwg
