Abstract:
The present invention provides a digital multimedia broadcasting transmitting apparatus, including: a pilot signal generator that is used in estimating a transmission channel in a receiving apparatus and generates a pilot signal including at least one information a; a subcarrier mapping unit that maps the pilot signal to a subcarrier corresponding thereto; and a modulating unit that modulates an output of the subcarrier mapping unit, wherein the pilot signal has a value for specific information rather than a predetermined value in the receiving apparatus.
Abstract:
Provided is a transmitting/receiving method and device for providing a conditional access broadcasting service. A transmitting method for providing a conditional access broadcasting service includes generating a control word (SI 10) for scrambling by- encoding a conditional access subscriber's, and changing the encoded data into an entitlement control message and an entitlement management message including the data generated by classifying the conditional access subscriber and a non-subscriber by activating the data (S120). Also, the method includes generating a final stream by multiplexing (S130) the entitlement control message, the entitlement management message, and a base stream for a first broadcasting service (SI 40), generating a base layer frame and an enhancement layer frame (SI 50) based on the final stream and an enhancement layer stream for a second broadcasting service, generating a broadcasting signal by hierarchically modulating (SI 60) the base layer frame and the enhancement layer frame, and transmitting the broadcasting signal.
Abstract:
A digital multimedia broadcasting transmitting apparatus includes: a variable spreader (120) that spreads a pilot signal to a frequency domain and outputs a signal having a format where the pilot signal is partially inserted to the entire subcarriers; a modulator (130) that modulates the output of the variable spreader (120); and an antenna (140) that transmits the signal modulated by the modulator (130).
Abstract:
An apparatus for transmitting digital multimedia broadcasting includes: a base layer processor that outputs a base layer stream; an enhancement layer processor that outputs an enhancement layer stream; and a transmitter that modulates the enhancement layer stream based on one of a first and second hierarchical modulation modes using different modulation schemes and maps a symbol of the modulated enhancement layer stream based on a symbol position of the base layer stream to generate a transmission frame.
Abstract:
A transmission apparatus for a broadcast service according to the present invention comprises: a sync layer (SL) packetizer which receives a basic layer elementary stream and an enhanced layer elementary stream and generates SL packets for each stream; a packetized elementary stream (PES) packetizer which converts each of the SL packets into PES packets; a first TS multiplexer unit which multiplexes the PES packets and outputs a basic layer transport stream; and a second TS multiplexer unit which multiplexes the PES packets, and outputs an enhanced layer transport stream, wherein said second TS multiplexer unit inserts, into the enhanced layer transport stream, a descriptor containing information on whether or not the enhanced layer transport stream is dependent on the basic layer transport stream.
Abstract:
A method and apparatus for processing enhanced media data in a Digital Multimedia Broadcasting (DMB) system is provided. The apparatus for processing enhanced media data includes: a base layer processing unit configured to multiplex an elementary stream of a base layer and perform channel encoding for the multiplexed elementary stream of the base layer; an enhancement layer processing unit configured to synchronize an elementary stream of an enhancement layer with the elementary stream of the base layer and thereby multiplex the elementary stream of the enhancement layer and process the elementary stream of the enhancement layer to be transmittable via at least one of a plurality of transmission channels; and a synchronizer configured to provide the enhancement layer processing unit with synchronization information that is used for synchronizing the elementary stream of the enhancement layer with the elementary stream of the base layer.
Abstract:
The terminal (130) has a data transmission unit for transmitting information concerning a point in time to decode a portion of contents received using a broadcasting network (120) i.e. terrestrial multi-media digital broadcasting network, with a communication network (140). A receiving unit receives a remaining portion of the contents received from the communication network after the point in time to decode the portion of the contents that run-out. A transfer control unit controls transferring of the contents from the broadcasting network to the communication network. The information includes a value depending to a group including a system clock value of the contents, a packet counter value of the contents and a reference value of coordinated universal time.
Abstract:
La présente invention propose un procédé et un dispositif pour construire un réseau à fréquence unique (SFN) en effectuant une synchronisation temporelle d'un signal d'interface de transport d'ensemble (ETI) qui est délivré en sortie par différents multiplexeurs d'ensemble. Dans un système de radiodiffusion numérique multimédia terrestre évoluée (AT-DMB), même quand une couche de base et une couche évoluée sont délivrées à partir de différents multiplexeurs d'ensemble, en synchronisant des paramètres liés à la synchronisation temporelle qui sont inclus dans une trame ETI, un signal ETI dans lequel un temps est synchronisé avec un signal ETI spécifique pout être délivré en sortie. Par conséquent, en utilisant un procédé et un dispositif pour synchroniser un temps d'ETI, durant la construction d'un SFN AT-DMB, un multiplexeur d'ensemble T-DMB existant peut être recyclé et un coût pouvant survenir lors de l'ajout d'un multiplexeur d'ensemble exclusif AT-DMB peut être économisé.
Abstract:
Es wird eine Vorrichtung zum Verwürfeln oder Entwürfeln eines Multimediastroms, der in einem Signal des digitalen Multimediarundfunks (DMB) enthalten ist, geschaffen. Die Vorrichtung kann nur einen Abschnitt von Audioströmen oder Videoströmen, die in einem Multimediastrom enthalten sind, verwürfeln oder kann einen Multimediastrom, in dem nur ein Abschnitt der Ströme verwürfelt ist, verarbeiten.
Abstract:
Es ist ein Signalgabeverfahren für einen hybriden digitalen Multimedia-Rundfunkübertragungs-(DMB = digital multimedia broadcasting)Dienst offenbart, das ein Definieren eines Datendienstkomponententyps in Anwenderanwendungsinformation, ein Definieren eines Anwenderanwendungstyps in der Anwenderanwendungsinformation, ein Eingeben von Information über einen Hybrid-DMB-Dienst in die Anwenderanwendungsinformation, um als ein Hauptobjekttyp-Identifizierer verwendet zu werden, ein zusätzliches Zuteilen eines reservierten Felds zu einem Feldwert, der dem Hauptobjekttyp-Identifizierer zugeteilt ist, ein Hinzufügen eines Hybrid-DMB-Diensttyp-Identifizierers zu dem reservierten Feld und ein Senden der Anwenderanwendungsinformation zu einem Empfangsendgerät enthält.