VSB reception system with enhanced signal detection for processing supplemental data
First Claim
1. A digital television receiver, comprising:
- a demodulator detecting sync information in an input signal comprising first service data multiplexed with second service data and demodulate the input signal;
a first forward error correction (FEC) decoder decoding the demodulated signal for first forward error correction (FEC) in order to correct errors in the first and second service data that occurred during reception of the input signal;
a demultiplexer demultiplexing the first service data and the second service data from the FEC-decoded signal; and
a second forward error correction (FEC) decoder decoding the demultiplexed first service data for second forward error correction (FEC) in order to additionally correct errors in the first service data that occurred during the reception of the input signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy VSB receiver for processing the data received from the VSB transmission system in a reverse order of the VSB transmission system by using the sequence, and a demultiplexer for demultiplexing the data from the modified legacy VSB receiver into the MPEG data and the supplemental data. The VSB reception system also includes a supplemental data processor for processing the supplemental data segment from the demultiplexer in a reverse order of the transmission system, to obtain the supplemental data, thereby carrying out the slicer prediction, decoding, and symbol decision more accurately by using the predefined sequence, to improve a performance.
81 Citations
46 Claims
-
1. A digital television receiver, comprising:
-
a demodulator detecting sync information in an input signal comprising first service data multiplexed with second service data and demodulate the input signal; a first forward error correction (FEC) decoder decoding the demodulated signal for first forward error correction (FEC) in order to correct errors in the first and second service data that occurred during reception of the input signal; a demultiplexer demultiplexing the first service data and the second service data from the FEC-decoded signal; and a second forward error correction (FEC) decoder decoding the demultiplexed first service data for second forward error correction (FEC) in order to additionally correct errors in the first service data that occurred during the reception of the input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of decoding a digital broadcast signal, the method comprising:
-
detecting sync information in an input signal comprising first service data multiplexed with second service data and demodulating the input signal; decoding the demodulated signal for first forward error correction (FEC) in order to correct errors in the first and second service data that occurred during reception of the input signal; demultiplexing the first service data and the second service data from the FEC-decoded signal; and decoding the demultiplexed first service data for second forward error correction (FEC) in order to additionally correct errors in the first service data that occurred during the reception of the input signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A broadcast transmitter comprising:
-
a first forward error correction (FEC) coder coding first service data for first forward error correction (FEC) in order to reduce errors in the first service data during data transmission; a first multiplexer multiplexing the FEC-coded first service data and second service data; a second forward error correction (FEC) coder coding the multiplexed first and second service data for second forward error correction (FEC) in order to reduce errors in the first and second service data during data transmission; a frame formatter adding sync information to the FEC-coded first and second service data; and a modulator modulating the FEC-coded first and second service data containing the sync information for data transmission. - View Dependent Claims (16, 17, 18, 19, 20, 21)
-
-
22. A method of encoding a digital broadcast signal, the method comprising:
-
coding first service data for first forward error correction (FEC) in order to reduce errors in the first service data during data transmission; multiplexing the FEC-coded first service data and second service data; coding the multiplexed first and second service data for second forward error correction (FEC) in order to reduce errors in the first and second service data during data transmission adding sync information to the FEC-coded first and second service data; and modulating the FEC-coded first and second service data containing the sync information for data transmission. - View Dependent Claims (23, 24, 25, 26, 27, 28)
-
-
29. A digital television (DTV) receiver, comprising:
-
a sync detector detecting sync information in a digital television (DTV) signal comprising first service data multiplexed with second service data; a demodulator demodulating the DTV signal; a first decoder decoding the demodulated DTV signal for first error correction in order to correct errors in the first and second service data that occurred during reception of the DTV signal; a data extractor extracting the first service data from the decoded DTV signal; and a second decoder further decoding the extracted first service data for second error correction in order to additionally correct errors in the first service data that occurred during the reception of the DTV signal. - View Dependent Claims (30, 31)
-
-
32. A method of processing digital broadcast data, the method comprising:
-
detecting sync information in a digital television (DTV) signal comprising first service data multiplexed with second service data; demodulating the DTV signal; decoding the demodulated DTV signal for first error correction in order to correct errors in the first and second service data that occurred during reception of the DTV signal; extracting the first service data from the decoded DTV signal; and further decoding the extracted first service data for second error correction in order to additionally correct errors in the first service data that occurred during the reception of the DTV signal. - View Dependent Claims (33, 34)
-
-
35. A method of processing data in a transmission system, the method comprising:
-
performing first encoding on first data in a first encoder, the first data being input to the first encoder through a first path and including at least audio or video data; multiplexing the encoded first data with second data in a multiplexer, the second data being input to the multiplexer through a second path different from the first path and including at least audio or video data; performing second encoding on the multiplexed first and second data in a second encoder, the second encoding being different from the first encoding; and adding sync information to the first and second data encoded in the second encoder. - View Dependent Claims (36, 37)
-
-
38. A transmission system for processing data, the transmission system comprising:
-
a first encoder performing first encoding on first data, the first data being input to the first encoder through a first path and including at least audio or video data; a multiplexer multiplexing the encoded first data with second data, the second data being input to the multiplexer through a second path different from the first path and including at least audio or video data; a second encoder performing second encoding on the multiplexed first and second data, the second encoding being different from the first encoding; and an inserter for inserting sync information into the first and second data encoded in the second encoder. - View Dependent Claims (39, 40)
-
-
41. A method of processing data in a reception system, the method comprising:
-
detecting sync information from a signal in a sync detector, the signal including first data multiplexed with second data, the first and second data including at least audio or video data; performing first decoding on the multiplexed first and second data in a first decoder; separating the first data from the decoded first and second data in a demultiplexer, the first data being output from the demultiplexer through a first path, the second data being output from the demultiplexer through a second path different from the first path; and performing second decoding on the separated first data in a second decoder, the second decoding being different from the first decoding. - View Dependent Claims (42, 43)
-
-
44. A reception system for processing data, the reception system comprising:
-
a sync detector detecting sync information from a signal including first data multiplexed with second data, the first and second data including at least audio or video data; a first decoder performing first decoding on the multiplexed first and second data, a demultiplexer separating the first data from the decoded first and second data, the first data being output from the through a first path, the second data being output from the demultiplexer through a second path different from the first path; and a second decoder performing second decoding on the separated first data, the second decoding being different from the first decoding. - View Dependent Claims (45, 46)
-
Specification