Method of processing traffic information and digital broadcast system
First Claim
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1. A digital broadcast transmitter, comprising:
- a pre-processor pre-processing traffic information data, wherein the traffic information data are included in a first data group, the first data group being before reordering a second data group, the first data group further including known data in advance known to a digital broadcast receiver and a transmitter which is inserted continuously and periodically, the second data group having at least one segment, an end of respective segment in the second data group corresponding to MPEG header data;
a multiplexer multiplexing the traffic information data packet with one or more main audio and video (AV) data packets;
a trellis encoder having at least one memory and trellis-encoding the multiplexed data packets, the at least one memory being initialized by initialization data when data outputted from the multiplexer correspond to a beginning of a known data sequence; and
a data transmission unit inserting synchronization data into the trellis-encoded data, modulating the trellis-encoded data having the synchronization data, and transmitting the modulated data, wherein the traffic information data include tendency information on traffic congestion information and the tendency information corresponds to a value indicating one of improved, deteriorated, constant, and unknown state for a link in the location 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
17 Claims
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1. A digital broadcast transmitter, comprising:
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a pre-processor pre-processing traffic information data, wherein the traffic information data are included in a first data group, the first data group being before reordering a second data group, the first data group further including known data in advance known to a digital broadcast receiver and a transmitter which is inserted continuously and periodically, the second data group having at least one segment, an end of respective segment in the second data group corresponding to MPEG header data; a multiplexer multiplexing the traffic information data packet with one or more main audio and video (AV) data packets; a trellis encoder having at least one memory and trellis-encoding the multiplexed data packets, the at least one memory being initialized by initialization data when data outputted from the multiplexer correspond to a beginning of a known data sequence; and a data transmission unit inserting synchronization data into the trellis-encoded data, modulating the trellis-encoded data having the synchronization data, and transmitting the modulated data, wherein the traffic information data include tendency information on traffic congestion information and the tendency information corresponds to a value indicating one of improved, deteriorated, constant, and unknown state for a link in the location information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A digital broadcast transmitter, comprising:
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a pre-processor pre-processing traffic information data, wherein the traffic information data are included in a first data group, the first data group being before reordering a second data group, the first data group further including known data in advance known to a digital broadcast receiver and a transmitter which is inserted continuously and periodically, the second data group having at least one segment, an end of respective segment in the second data group corresponding to MPEG header data; a multiplexer multiplexing the traffic information data packet with one or more main audio and video (AV) data packets; a post-processor post-processing the multiplexed data by encoding only traffic information data included in the multiplexed data with a coding rate of C/H, wherein G and H are positive integers and G is less than H; a data encoding and interleaving unit adding first parity data into the post-processed data and interleaving the post-processed data having the first parity data; a trellis encoder having at least one memory and trellis-encoding 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 known data sequence; and a data transmission unit inserting synchronization data into the trellis-encoded data, modulating the trellis-encoded data having the synchronization data, and transmitting the modulated data, wherein the traffic information data include tendency information on traffic congestion information and the tendency information corresponds to a value indicating one of improved, deteriorated, constant, and unknown state for a link in the location information. - View Dependent Claims (8, 9, 10)
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11. A digital broadcast receiver, comprising:
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a demodulator demodulating a first data group including traffic information data and system information and performing error correction to the demodulated data, the first data group being generated after reordering a second data group in a digital broadcast transmitter, the first data group further including known data in advance known to a receiver and a transmitter which is inserted continuously and periodically, the second data group having at least one segment, an end of respective segment in the second data group corresponding to MPEG header data; a data demultiplexing and decoding unit demultiplexing the traffic information data and system information from the error-corrected data and decoding the demultiplexed traffic information data using the system information; a data storage storing the system information and the decoded traffic information data; and an application manager providing a traffic information service to a user using the stored traffic information data by extracting tendency information on traffic congestion information, wherein the tendency information corresponds to a value indicating one of improved, deteriorated, constant, and unknown state for a link in the location information. - View Dependent Claims (12, 13, 14, 15)
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16. A digital broadcast receiver, comprising:
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a tuner configured to receive a first data group including traffic information data, the first data group being generated after reordering a second data group in a digital broadcast transmitter, the first data group further including known data in advance known to a receiver and a transmitter which is inserted continuously and periodically, the second data group having at least one segment, an end of respective segment in the second data group corresponding to MPEG header data, wherein the traffic information data include tendency information on traffic congestion information, and the tendency information corresponds to a value indicating one of improved, deteriorated, constant, and unknown state for a link in the location information; a demodulator configured to perform demodulating on the traffic information data based on the known data; and a decoder configured to perform decoding on the demodulated traffic information data.
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17. A method of processing digital broadcast data in a digital broadcast receiver, comprising:
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receiving a first data group including traffic information data, the first data group being generated after reordering a second data group in a digital broadcast transmitter, the first data group further including known data in advance known to a receiver and a transmitter which is inserted continuously and periodically, the second data group having at least one segment, an end of respective segment in the second data group corresponding to MPEG header data, wherein the traffic information data include tendency information on traffic congestion information, and the tendency information corresponds to a value indicating one of improved, deteriorated, constant, and unknown state for a link in the location information; performing demodulating on the traffic information data based on the known data; and performing decoding on the demodulated traffic information data.
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Specification