Abstract:
Provided is a method and apparatus for providing local broadcasting in a digital multimedia system. The apparatus receives a first transport stream broadcasted from a main broadcasting system, extracts a main broadcasting stream from the first transport stream, and is provided with a local broadcasting stream corresponding to data for a local broadcasting service. Further, a first layer signal and a second layer signal are generated according to a predetermined format by respectively multiplexing the main broadcasting stream and the local broadcasting stream. Information for notifying that there is data for a local broadcasting service is included in the first layer signal. The first layer signal and the second layer signal are hierarchically modulated and are transmitted through a different frequency bandwidth from that through which the first transport stream is transmitted.
Abstract:
A broadcasting signal receiving device demodulates received broadcasting signals with the terrestrial digital multimedia broadcasting mode and the advanced terrestrial digital multimedia broadcasting mode, checks an error of the demodulated high-speed information channel data, and selects a receiving mode of the broadcasting signal receiving device from among the terrestrial digital multimedia broadcasting mode and the advanced terrestrial digital multimedia broadcasting mode.
Abstract:
A broadcasting signal transmitting method of a broadcasting signal transmitting apparatus is provided. According to the method, a base layer signal including a plurality of subchannels that include a base layer symbol is generated, and an enhancement layer signal including an enhancement layer symbol is generated. In a first subchannel corresponding to a section in which the enhancement layer signal has data among a plurality of subchannels, a hierarchical modulation symbol is generated by hierarchically modulating the base layer symbol and the enhancement layer symbol in accordance with a hierarchical modulation index. In a second subchannel corresponding to a section in which the enhancement layer signal does have not data among the plurality of subchannels, the base layer symbol is outputted. The broadcasting signal including the hierarchical modulation symbol of the first subchannel and the base layer symbol of the second subchannel is transmitted.
Abstract:
Disclosed is a digital broadcast protocol conversion system including: a PSIP/PSI extractor for demultiplexing a transport stream of an ATSC broadcast standard to extract PSIP/PSI data; an SI/PSI extractor for demultiplexing a transport stream of a DVB broadcast standard to extract SI/PSI data; a protocol converter for converting the PSIP/PSI data to SI'/PSI' data corresponding to a broadcast protocol of the DVB broadcast standard or converting the SI/PSI data to PSIP'/PSI' data corresponding to a broadcast protocol of the ATSC broadcast standard; and a multiplexer for multiplexing the SI'/PSI' data and the transport stream having the PSIP/PSI data extracted therefrom, or multiplexing the PSIP'/PSI' data and the transport stream having the PSIP/PSI data extracted therefrom, thereby converting the broadcast protocol between different broadcast standards and making it possible to use contents of a specific standard in a broadcast system of a different standard.
Abstract:
A broadcasting signal transmitting method of a broadcasting signal transmitting apparatus is provided. According to the method, a base layer signal including a plurality of subchannels that include a base layer symbol is generated, and an enhancement layer signal including an enhancement layer symbol is generated. In a first subchannel corresponding to a section in which the enhancement layer signal has data among a plurality of subchannels, a hierarchical modulation symbol is generated by hierarchically modulating the base layer symbol and the enhancement layer symbol in accordance with a hierarchical modulation index. In a second subchannel corresponding to a section in which the enhancement layer signal does have not data among the plurality of subchannels, the base layer symbol is outputted. The broadcasting signal including the hierarchical modulation symbol of the first subchannel and the base layer symbol of the second subchannel is transmitted.
Abstract:
Provided is a method and apparatus for providing local broadcasting in a digital multimedia system. The apparatus receives a first transport stream broadcasted from a main broadcasting system, extracts a main broadcasting stream from the first transport stream, and is provided with a local broadcasting stream corresponding to data for a local broadcasting service. Further, a first layer signal and a second layer signal are generated according to a predetermined format by respectively multiplexing the main broadcasting stream and the local broadcasting stream. Information for notifying that there is data for a local broadcasting service is included in the first layer signal. The first layer signal and the second layer signal are hierarchically modulated and are transmitted through a different frequency bandwidth from that through which the first transport stream is transmitted.
Abstract:
Broadcasting signals transmitted from a signal transmitting apparatus are demodulated into first main service channel data and first fast information channel data, and a hierarchical modulation mode value is extracted by analyzing the first fast information channel data. The broadcasting signals are demodulated into second main service channel data and second fast information channel data using the hierarchical modulation mode value, and then the fast information channel data information is extracted from the second fast information channel data. After the service channel data of the base layer and the service channel data of the enhancement layer that are output from the second fast information channel data are demultiplexed using the fast information channel data information to generate the plurality of broadcasting services, one of the plurality of generated broadcasting services is selected and reproduced as a broadcasting program.
Abstract:
A broadcasting signal receiving device demodulates received broadcasting signals with the terrestrial digital multimedia broadcasting mode and the advanced terrestrial digital multimedia broadcasting mode, checks an error of the demodulated high-speed information channel data, and selects a receiving mode of the broadcasting signal receiving device from among the terrestrial digital multimedia broadcasting mode and the advanced terrestrial digital multimedia broadcasting mode.
Abstract:
Disclosed is a digital broadcast protocol conversion system including: a PSIP/PSI extractor for demultiplexing a transport stream of an ATSC broadcast standard to extract PSIP/PSI data; an SI/PSI extractor for demultiplexing a transport stream of a DVB broadcast standard to extract SI/PSI data; a protocol converter for converting the PSIP/PSI data to SI'/PSI' data corresponding to a broadcast protocol of the DVB broadcast standard or converting the SI/PSI data to PSIP'/PSI' data corresponding to a broadcast protocol of the ATSC broadcast standard; and a multiplexer for multiplexing the SI'/PSI' data and the transport stream having the PSIP/PSI data extracted therefrom, or multiplexing the PSIP'/PSI' data and the transport stream having the PSIP/PSI data extracted therefrom, thereby converting the broadcast protocol between different broadcast standards and making it possible to use contents of a specific standard in a broadcast system of a different standard.