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:
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:
In a method of transmitting broadcasting signals, a transmission frame has the same configuration as that of the existing terrestrial DMB signal. A transmission frame including a base layer service stream is modulated to a base layer, and a transmission frame including an enhancement layer service stream is modulated to an enhancement layer. The enhancement layer service stream is composed of additional data that is not included in the base layer service stream, in order to provide an enhancement layer service. In this way, the method can provide a high-quality service requiring high transmission efficiency while being compatible with the existing terrestrial DMB system. The high transmission efficiency means a higher data transfer rate than that of the existing terrestrial DMB system.
Abstract:
In a terrestrial DMB, a transmitting apparatus multiplexes a plurality of service streams generated for any service to a plurality of ensembles. In this case, the same sending time data is constructed in a time stamp field of each frame for each of a plurality of ensembles. With this configuration, a plurality of transmitting apparatuses can send a plurality of transmission frames including service streams for the same service at the same point of time, and thus receiving apparatuses can actually receive a plurality of transmission frames at the same point of time.
Abstract:
Lors de la fourniture d'un service Web de diffusion basé sur une diffusion multimédia numérique (DMB) terrestre, un site Web de diffusion de qualité étendue est formé en combinant des données pour un service de site Web de diffusion de qualité de base et des données fournies en plus. Pour cela, des objets correspondant à des données pour le service de site Web de diffusion de qualité de base sont émis par le biais d'une couche de base et des objets correspondant aux données pour le service de site Web de diffusion de qualité étendue sont émis par le biais d'une couche d'amélioration.
Abstract:
Il est proposé un procédé de fourniture d'un signal de diffusion 3D à l'aide d'un système DMB comprenant : une étape de réception d'un signal de diffusion comprenant un signal audio, un signal vidéo 2D, un signal vidéo 3D, un signal de données générales et un signal de données 3D additionnelles ; une étape de génération d'un flux continu de couche de base en multiplexant le signal audio, le signal vidéo 2D et le signal de données générales ; une étape de génération d'un flux continu de couche d'amélioration en multiplexant le signal audio, le signal vidéo 3D, le signal de données générales et le signal de données 3D additionnelles ; et une étape de génération d'un signal de diffusion 3D en modulant le flux continu de couche de base et le flux continu de couche d'amélioration.
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:
Provided are an apparatus and method for multiplexing and demultiplexing based on DMB. The multiplexing apparatus includes a packetizer, a section generator, and a multiplexer. The packetizer (340) packetizes element streams and object information of a base layer and an enhancement layer. The section generator (350, 360) generates 14496 sections including the object information of the base layer and the enhancement layer, a SCST section having element stream information of the enhancement layer, an IOD having descriptors for the object information of the base layer and the enhancement layer, and a PSI section having a descriptor connecting the SCST. The multiplexer (380,390) generates base layer and enhancement layer TSs by multiplexing the packetized element streams and the packetized object information of the base layer and the enhancement layer, the 14496 sections including the object information of the base layer and the enhancement layer, the PSI section, and the SCST section.
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.