Abstract:
The present invention relates to a multimedia broadcast signal transmitting/receiving method, and it generates a pilot signal by mapping transmission information on an orthogonal code, disperses the pilot signal in the frequency domain, modulates the dispersed pilot signal, and transmits the modulated pilot signal.
Abstract:
In order to achieve synchronization of ensemble transport interface (ETI) signals of a first network and a second network, a synchronization device receives a first ETI signal from the first network and a second ETI signal from the second network, generates delay times between the same frames, compares frames of the first ETI signal and frames of the second ETI signal, and then synchronizes the first ETI signal and the second ETI signal according to the delay time.
Abstract:
The present invention relates to a local broadcasting service providing method and device in a local broadcasting system. The local broadcasting service providing device receives a first main broadcasting signal from a terrestrial digital multimedia broadcasting system, and converts the first main broadcasting signal into a second main broadcasting signal for local broadcasting. The local broadcasting service providing device generates a second local broadcasting signal by encoding the first local broadcasting signal to be broadcast, hierarchically modulates the second main broadcasting signal and the second local broadcasting signal, and transmits the signals. Ac¬ cordingly, the local broadcasting service providing device provides compatibility with terrestrial digital multimedia broadcasting and a local broadcasting service in a specific area to thus provide convenience to the user.
Abstract:
The present invention relates to a multimedia broadcast signal transmitting/receiving method, and it generates a pilot signal by mapping transmission information on an orthogonal code, disperses the pilot signal in the frequency domain, modulates the dispersed pilot signal, and transmits the modulated pilot signal.
Abstract:
In order to achieve synchronization of ensemble transport interface (ETI) signals of a first network and a second network, a synchronization device receives a first ETI signal from the first network and a second ETI signal from the second network, generates delay times between the same frames, compares frames of the first ETI signal and frames of the second ETI signal, and then synchronizes the first ETI signal and the second ETI signal according to the delay time.
Abstract:
The present invention relates to a local broadcasting service providing method and device in a local broadcasting system. The local broadcasting service providing device receives a first main broadcasting signal from a terrestrial digital multimedia broadcasting system, and converts the first main broadcasting signal into a second main broadcasting signal for local broadcasting. The local broadcasting service providing device generates a second local broadcasting signal by encoding the first local broadcasting signal to be broadcast, hierarchically modulates the second main broadcasting signal and the second local broadcasting signal, and transmits the signals. Ac¬ cordingly, the local broadcasting service providing device provides compatibility with terrestrial digital multimedia broadcasting and a local broadcasting service in a specific area to thus provide convenience to the user.