Method of processing traffic information and digital broadcast system
First Claim
Patent Images
1. A digital broadcast transmitter, comprising:
- a pre-processor configured to pre-process enhanced data, the enhanced data being included in a first data group having known data, wherein the pre-processor further configured to de-interleave the first data group to output a second data group, each packet of both the first data group and the second data group consisting of 207 bytes, the first segment and the last segment in the first data group having RS parity data;
a multiplexer configured to multiplex the enhanced data with one or more main audio and video data;
a post-processor configured to post-process the multiplexed data by encoding only the enhanced 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 corresponds to a start 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 transmitting the modulated data, wherein the enhanced data includes a status information, which includes prediction information on a link travel time, and a traffic information message, which includes location information corresponding to the status 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.
30 Citations
15 Claims
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1. A digital broadcast transmitter, comprising:
a pre-processor configured to pre-process enhanced data, the enhanced data being included in a first data group having known data, wherein the pre-processor further configured to de-interleave the first data group to output a second data group, each packet of both the first data group and the second data group consisting of 207 bytes, the first segment and the last segment in the first data group having RS parity data; a multiplexer configured to multiplex the enhanced data with one or more main audio and video data; a post-processor configured to post-process the multiplexed data by encoding only the enhanced 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 corresponds to a start 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 transmitting the modulated data, wherein the enhanced data includes a status information, which includes prediction information on a link travel time, and a traffic information message, which includes location information corresponding to the status information. - View Dependent Claims (2, 3, 4, 5, 12)
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6. A digital broadcast transmitter, comprising:
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a pre-processor configured to pre-process enhanced data, the enhanced data being included in a first data group having known data, wherein the pre-processor further configured to de-interleave the first data group to output a second data group, each packet of both the first data group and the second data group consisting of 207 bytes, the first segment and the last segment in the first data group having RS parity data; a multiplexer configured to multiplex the enhanced data with one or more main audio and video data; a data encoding and interleaving unit configured to add first parity data into the multiplexed data and interleaving the multiplexed data having the parity data; a post-processor configured to post-process the interleaved data by coding only the enhanced 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 corresponds to a start 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 enhanced data includes status information, which includes prediction information on a link travel time and an identifier indicating that the prediction information on the link travel time is included, and a traffic information message, which includes location information corresponding to the prediction information. - View Dependent Claims (7, 13)
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8. A method of processing enhanced data in a digital broadcast receiver, the method comprising:
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receiving a first data group including enhanced data and system information; de-interleaving the first data group to output a second data group, each packet of both the first data group and the second data group consisting of 207 bytes, the first segment and the last segment in the first data group having RS parity data; demultiplexing the enhanced data and the system information; decoding the enhanced data using the system information, thereby extracting prediction information on a link travel time and location information corresponding to the prediction information; and providing a service to a user using the extracted prediction information and location information. - View Dependent Claims (9, 14)
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10. A digital broadcast receiver, comprising:
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a demodulator configured to demodulate a first data group including enhanced data and system information; a de-interleaver configured to de-interleave the first data group to output a second data group, each packet of both the first data group and the second data group consisting of 207 bytes, the first segment and the last segment in the first data group having RS parity data; a data decoding unit configured to decode the demodulated enhanced data; a data storage configured to store the decoded enhanced data; and an application manager configured to provide a service to a user reading the stored enhanced data by extracting prediction information on a link travel time and location information corresponding to the prediction information, wherein the demodulator comprises; an equalizer configured to channel-equalize the enahnced data based on known data; a block decoder configured to perform soft decision decoding on the channel-equalized enhanced 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 (11, 15)
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Specification