Method of processing traffic information and digital broadcasting system
First Claim
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1. A digital broadcast transmitter, comprising:
- a pre-processor configured to pre-process traffic information data, wherein the traffic information data are included in a data group comprising known data in advance known to the receiver and a digital broadcast transmitter, the known data inserted continuously and periodically in the data group, the data group divided into at least two areas, one area of them having main data and the traffic information data able to be coded at a first code rate, and another area of them having the traffic information data able to be coded at a second code rate lower than the first code rate;
a multiplexer configured to multiplex the traffic information data with one or more main audio and video (AV) data;
a trellis encoder configured to have at least one memory and trellis-code the multiplexed data,the at least one memory being initialized by initialization data when data outputted from the multiplexer correspond to a beginning of a sequence of the known data; and
a data transmission unit configured to insert synchronization data into the trellis-encoded data, modulate the trellis-encoded data having the synchronization data, and transmit the modulated data,wherein the traffic information data include at least one of road change information and traffic route shape information.
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Abstract
A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.
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Citations
16 Claims
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1. A digital broadcast transmitter, comprising:
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a pre-processor configured to pre-process traffic information data, wherein the traffic information data are included in a data group comprising known data in advance known to the receiver and a digital broadcast transmitter, the known data inserted continuously and periodically in the data group, the data group divided into at least two areas, one area of them having main data and the traffic information data able to be coded at a first code rate, and another area of them having the traffic information data able to be coded at a second code rate lower than the first code rate; a multiplexer configured to multiplex the traffic information data with one or more main audio and video (AV) data; a trellis encoder configured to have at least one memory and trellis-code the multiplexed data, the at least one memory being initialized by initialization data when data outputted from the multiplexer correspond to a beginning of a sequence of the known data; and a data transmission unit configured to insert synchronization data into the trellis-encoded data, modulate the trellis-encoded data having the synchronization data, and transmit the modulated data, wherein the traffic information data include at least one of road change information and traffic route shape information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A digital broadcast transmitter, comprising:
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a pre-processor configured to pre-process traffic information data, wherein the traffic information data are included in a data group comprising known data in advance known to the receiver and a digital broadcast transmitter, the known data inserted continuously and periodically in the data group, the data group divided into at least two areas, one area of them having main data and the traffic information data able to be coded at a first code rate, and another area of them having the traffic information data able to be coded at a second code rate lower than the first code rate; a multiplexer configured to multiplex the traffic information data with one or more main audio and video (AV) data; a post-processor configured to post-process the multiplexed data by encoding only traffic information data included in the multiplexed data with a coding rate of G/H, wherein G and H are positive integers and G is less than H; a data encoding and interleaving unit configured to add first parity data into the post-processed data and interleave the post-processed data having the first parity data; a trellis encoder configured to have at least one memory and trellis-encode the interleaved data, the at least one memory being initialized by initialization data when data outputted from the data encoding and interleaving unit correspond to a beginning of a sequence of the known data; and a data transmission unit configured to insert synchronization data into the trellis-encoded data, modulate the trellis-encoded data having the synchronization data, and transmit the modulated data, wherein the traffic information data include at least one of road change information and traffic route shape information. - View Dependent Claims (9, 10, 11, 12)
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13. A digital broadcast transmitter, comprising:
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a pre-processor configured to pre-process traffic information data, wherein the traffic information data are included in a data group comprising known data in advance known to the receiver and a digital broadcast transmitter, the known data inserted continuously and periodically in the data group, the data group divided into at least two areas, one area of them having main data and the traffic information data able to be coded at a first code rate, and another area of them having the traffic information data able to be coded at a second code rate lower than the first code rate; a multiplexer configured to multiplex the traffic information data with one or more main audio and video (AV) data; a data encoding and interleaving unit configured to add first parity data into the multiplexed data and interleave the multiplexed data having the parity data; a post-processor configured to post-process the interleaved data by coding only traffic information data included in the interleaved data with a coding rate of G/H, wherein G and H are positive integers and G is less than H; a trellis encoder configured to have at least one memory and trellis-encode the post-processed data, the at least one memory being initialized by initialization data when data outputted from the post-processor correspond to a beginning of a sequence of the known data; and a data transmission unit configured to insert synchronization data into the trellis-encoded data, modulate the trellis-encoded data having the synchronization data, and transmit the modulated data, wherein the traffic information data include at least one of road change information and traffic route shape information. - View Dependent Claims (14)
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15. A digital broadcast receiver, comprising:
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a demodulator configured to demodulate a data group including traffic information data and known data in advance known to the receiver and a digital broadcast transmitter, the known data inserted continuously and periodically in the data group, the data group divided into at least two areas, one area of them having main data and the traffic information data able to be coded at a first code rate, and another area of them having the traffic information data able to be coded at a second code rate lower than the first code rate; a data decoding unit configured to decode the demodulated traffic information data; a data storage configured to store the decoded traffic information data; and an application manager configured to provide a traffic information service to a user using the stored traffic information data by extracting at least one of road change information, traffic route shape information and average speed, wherein the demodulator comprises; an equalizer configured to channel-equalize the traffic information data based on the known data; a block decoder configured to perform soft decision decoding on the channel-equalized traffic information data; and a reed solomon frame decoder configured to perform an inverse process of a reed solomon frame encoder included in the transmitter. - View Dependent Claims (16)
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Specification