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:
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 DMB/mobile telecommunication integrated service terminal and a method for connecting a DMB network and a mobile telecommunication network, which can provide a DMB broadcasting service in a mobile environment and a two-way data service through a mobile telecommunication network simultaneously by integrating a mobile telecommunication terminal and a mobile DMB receiving terminal and physically/logically connecting them into one entity. The DMB/mobile telecommunication integrated service terminal for connecting a network between DMB and a mobile telecommunication includes a DMB broadcasting processing block for extracting video/audio and synchronized data, transmitting the video/audio to corresponding application program for restoration, and transmitting the DMB data to a DMB/mobile telecommunication network connecting block, but generating network linkage data by integrating mobile data with the DMB data in case that the mobile data are transmitted from a mobile telecommunication accessing block; a DMB/mobile telecommunication network connecting block for controlling the DMB broadcasting processing block, an application program or a mobile telecommunication accessing block to receive a DMB broadcasting or provide a mobile telecommunication service, requesting additional mobile data to a return channel server through the mobile telecommunication accessing block upon a user request during DMB broadcasting reception, and processing the network linkage data generated in the DMB broadcasting processing block; and the mobile telecommunication accessing block for performing a mobile telecommunication network accessing process receiving the mobile data from the return channel server, and transmitting the mobile data to the DMB broadcasting processing block or the DMB/mobile telecommunication network connecting block under control of the DMB/mobile telecommunication network connecting block. The DMB/mobile telecommunication integrated service terminal is applied to a DMB/mobile telecommunication integrated service.
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 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. Also, the method includes generating a final stream by multiplexing the entitlement control message, the entitlement management message, and a base layer stream for a first broadcasting service, generating a base layer frame and an enhancement layer frame based on the final stream and an enhancement layer stream for a second broadcasting service, generating a broadcasting signal by hierarchically modulating 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 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 that modulates the output of the variable spreader; and an antenna that transmits the signal modulated by the modulator.
Abstract:
Provided is a DMB/mobile telecommunication integrated service terminal and a method for connecting a DMB network and a mobile telecommunication network, which can provide a DMB broadcasting service in a mobile environment and a two-way data service through a mobile telecommunication network simultaneously by integrating a mobile telecommunication terminal and a mobile DMB receiving terminal and physically/logically connecting them into one entity. The DMB/mobile telecommunication integrated service terminal for connecting a network between DMB and a mobile telecommunication includes a DMB broadcasting processing block for extracting video/audio and synchronized data, transmitting the video/audio to corresponding application program for restoration, and transmitting the DMB data to a DMB/mobile telecommunication network connecting block, but generating network linkage data by integrating mobile data with the DMB data in case that the mobile data are transmitted from a mobile telecommunication accessing block; a DMB/mobile telecommunication network connecting block for controlling the DMB broadcasting processing block, an application program or a mobile telecommunication accessing block to receive a DMB broadcasting or provide a mobile telecommunication service, requesting additional mobile data to a return channel server through the mobile telecommunication accessing block upon a user request during DMB broadcasting reception, and processing the network linkage data generated in the DMB broadcasting processing block; and the mobile telecommunication accessing block for performing a mobile telecommunication network accessing process receiving the mobile data from the return channel server, and transmitting the mobile data to the DMB broadcasting processing block or the DMB/mobile telecommunication network connecting block under control of the DMB/mobile telecommunication network connecting block. The DMB/mobile telecommunication integrated service terminal is applied to a DMB/mobile telecommunication integrated service.
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:
A transmission apparatus for broadcasting service according to the present invention includes a sync layer (SL) packetizer for receiving a base layer elementary stream and an enhancement layer elementary stream and generating an SL packet for the base layer elementary stream and an SL packet for the enhancement layer elementary stream, a packetized elementary stream (PES) packetizer for converting the SL packets into respective PES packets, a first transport stream (TS) multiplexer for multiplexing the PES packet and outputting a base layer transport stream, and a second TS multiplexer for multiplexing the PES packet and outputting an enhancement layer transport stream. The second TS multiplexer inserts a descriptor into the enhancement layer transport stream. The descriptor includes information about whether the enhancement layer transport stream is dependent on the base layer transport stream.
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.