According to one embodiment, a transmitter for transmitting at least one broadcast signal having PLP (Physical Layer Pipe) data includes: a BCH (Bose-Chadhuri-Hocquenghem) encoder configured to BCH encode the PLP data; an LDPC (Low Density Parity Check) encoder configured to LDPC encode the BCH encoded PLP data and output FECFrames (Forward Error Correction Frames); a mapper configured to map data in the FECFrames onto constellations by QAM (Quadrature Amplitude Modulation) schemes; a time-interleaver configured to time-interleave the mapped data; a frame builder configured to build a signal frame including preamble symbols and data symbols; and an OFDM (Orthogonal Frequency Division Multiplexing) modulator configured to modulate data in the signal frame by an OFDM scheme. The PLP data are processed by an LDPC scheme for a long or a short LDPC FECframe. The preamble symbols include signaling information for the time-interleaved PLP data. The data symbols include the time-interleaved PLP data.

An audio device and a control method thereof are provided. The audio device includes a charger and at least one audio broadcaster. The charger is coupled to a transmission line and is configured to generate a charging voltage. The audio broadcaster is coupled to the charger through the transmission line. The charger transmits the charging voltage to the audio broadcaster through the transmission line, and transmits first data to the audio broadcaster through the transmission line. The audio broadcaster transmits second data to the charger through the transmission line.

An audio device and a control method thereof are provided. The audio device includes a charger and at least one audio broadcaster. The charger is coupled to a transmission line and is configured to generate a charging voltage. The audio broadcaster is coupled to the charger through the transmission line. The charger transmits the charging voltage to the audio broadcaster through the transmission line, and transmits first data to the audio broadcaster through the transmission line. The audio broadcaster transmits second data to the charger through the transmission line.

It is possible for the content distribution side to control the conditions of target viewers for distributions without depending on the functions specific to a receiver. Content which is broadcast, a content profile, and a program are received. In an initial step of the program, prestored viewer profile information is read. All the content profiles and the contents are downloaded temporarily. Next, the profile information is read, and then a process of matching the profile information with the viewer profile information is performed. When it is determined that they do not match, a matching process for the next content profile is performed. If, on the other hand, they match, at the next step, the content is stored. The viewer reproduces the stored content at an appropriate time.

An audio device and a control method thereof are provided. The audio device includes a charger and at least one audio broadcaster. The charger is coupled to a transmission line and is configured to generate a charging voltage. The audio broadcaster is coupled to the charger through the transmission line. The charger transmits the charging voltage to the audio broadcaster through the transmission line, and transmits first data to the audio broadcaster through the transmission line. The audio broadcaster transmits second data to the charger through the transmission line.

An audio device and a control method thereof are provided. The audio device includes a charger and at least one audio broadcaster. The charger is coupled to a transmission line and is configured to generate a charging voltage. The audio broadcaster is coupled to the charger through the transmission line. The charger transmits the charging voltage to the audio broadcaster through the transmission line, and transmits first data to the audio broadcaster through the transmission line. The audio broadcaster transmits second data to the charger through the transmission line.