Abstract

The invention relates to a reception method that comprises, the step of recovering (18) a conveyance packet (TS), the conveyance packet (TS) conveying a SI/PSI table, the SI/PSI table including a version field, and the step of reading (20) the value of the version field of the SI/PSI table conveyed by the conveyance packet (TS), characterised in that it comprises the step of comparing (22) the read value of the version field of said SI/PSI table with a stored value, in case the read value is different from the stored value, the step of recovering (30) the entire SI/PSI table, and the step of storing (32) the read value so as to replace the stored value.

IPC Classes  ?

• H04N 5/00 - Details of television systems
• H04N 7/16 - Analogue secrecy systemsAnalogue subscription systems
• H04N 7/24 - Systems for the transmission of television signals using pulse code modulation

Abstract

Method for scanning frequencies of a network by a tuner, in order to determine available frequencies, the network comprising a plurality of coverage zones, a respective signal being emitted over each coverage zone of the network, at a respective frequency, the tuner being located in one of the coverage zones, referred to as the current coverage zone, a signal, referred to as the current signal, being emitted over the current coverage zone, the current signal conveying a plurality of services according to a time slicing method. The method comprising obtaining (100, 102) a group of frequency values of the frequencies of coverage zones of the network, and during time intervals separating the time slices dedicated to the at least one service intended to be received, the tuner scanning (104) all the frequency values of the group in order to determine available frequencies, whatever is the number of frequency values in the group.

IPC Classes  ?

• H04H 60/43 - Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast channels

Abstract

Method of decoding a DVB digital television service by a DVB-H portable digital television receiver intended to be integrated into a terminal, characterized in that it comprises: - a step of retaining in memory, in a memory of the terminal (2), SI/PSI tables, while the terminal is switched off; - a step of switching on (28) the terminal; - a step of loading (30) the SI/PSI tables from the memory of the terminal; and - a step of attempted decoding (40), of said DVB service using the SI/PSI tables loaded.

IPC Classes  ?

• H04H 40/09 - Arrangements for receiving desired information automatically according to timetables
• H04H 60/25 - Arrangements for updating broadcast information or broadcast-related information

Abstract

The method comprises determining (100) a first surface of a first coverage zone, determining (102) second surfaces of second coverage zones, determining (104), amongst the second coverage zones, a second coverage zone, referred to as the most probable second coverage zone, whose second surface has the greater overlapping with the surface of the first coverage zone, and attempting (106) to synchronize the turner with a second signal emitted over the most probable second coverage zone, in order to receive a second service.

IPC Classes  ?

• H04H 20/26 - Arrangements for switching distribution systems
• H04H 60/42 - Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast areas

Abstract

The packet interleaving method comprises selecting successive input sets of consecutive input packets (X1...XNin) received from a forward correction module (14), each input packet (Xj) being a vector of constellation points of a predetermined constellation diagram. For each input set, it further comprises generating an output set of output packets (O1...ONout), each output packet (Om) being a vector of constellation points, by distributing the constellation points of each input packet (Xj) of the input set, and sending the output packets (O1...ONout) of the output set to a modulator (18). The input set comprising Nin input packets (X1...XNin) and each of the Nin input packets (X1...XNin) comprising a same number Lin of constellation points, the number Nout of output packets in the output set is related to Lin by the relation Lin = A x Nout, where A is a fixed whole number.

IPC Classes  ?

• H03M 13/27 - Coding, decoding or code conversion, for error detection or error correctionCoding theory basic assumptionsCoding boundsError probability evaluation methodsChannel modelsSimulation or testing of codes using interleaving techniques
• H04L 1/00 - Arrangements for detecting or preventing errors in the information received