Digital television system
First Claim
1. A Vestigial Sideband (VSB) transmitter for transmitting a terrestrial broadcasting signal including main Advanced Television Systems Committee (ATSC) data and enhanced supplemental data, the VSB transmitter comprising:
- an additional error correction encoder for encoding the enhanced supplemental data for error correction;
a multiplexer for multiplexing the encoded supplemental data and the main ATSC data;
a Trellis Coded Modulation (TCM) encoder for encoding or bypassing a first input data bit in accordance with whether the first input data bit belongs to the main ATSC data or the enhanced supplemental data and for trellis-encoding a second input data bit, wherein the first and second data bits are generated based on the multiplexed data; and
a VSB modulator for modulating a signal generated based on the data bits output from the TCM encoder and transmitting the modulated signal to one or more VSB receivers.
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Accused Products
Abstract
Disclosed is a digital television system carrying out modulation/demodulation by VSB (vestigial side band). A VSB transmitter includes an additional error correction encoder designed in a manner that a signal mapping of a TCM encoder is considered, a multiplexer (MUX), a TCM encoder operating in a manner corresponding to state transition processes of the additional error correction encoder, and a signal transmission part including an RF converter. And, A VSB receiver includes a signal receiver part receiving a signal transmitted from the transmitter, a TCM decoder, a signal processing part including a derandomizer, and an additional error correction decoder part.
83 Citations
24 Claims
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1. A Vestigial Sideband (VSB) transmitter for transmitting a terrestrial broadcasting signal including main Advanced Television Systems Committee (ATSC) data and enhanced supplemental data, the VSB transmitter comprising:
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an additional error correction encoder for encoding the enhanced supplemental data for error correction; a multiplexer for multiplexing the encoded supplemental data and the main ATSC data; a Trellis Coded Modulation (TCM) encoder for encoding or bypassing a first input data bit in accordance with whether the first input data bit belongs to the main ATSC data or the enhanced supplemental data and for trellis-encoding a second input data bit, wherein the first and second data bits are generated based on the multiplexed data; and a VSB modulator for modulating a signal generated based on the data bits output from the TCM encoder and transmitting the modulated signal to one or more VSB receivers. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A Vestigial Sideband (VSB) transmitter for transmitting a terrestrial broadcasting signal including main Advanced Television Systems Committee (ATSC) data and additional data, the VSB transmitter comprising:
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an additional error correction encoder for performing state transition processes on the additional data; a main processor for operating in accordance with the state transition processes of the additional error correction encoder and configured to change input data if it belongs to the main ATSC data, and to bypass the input data if it belongs to the additional data; and a VSB mapper for mapping the coded or uncoded input data outputted from the main processor into a corresponding signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A digital television (DTV) receiver for processing a digital broadcast signal generated from encoding additional input data for additional error correction, multiplexing the encoded additional input data with conventional input data, Reed-Solomon (RS) encoding the multiplexed input data, interleaving the RS-encoded data, performing Trellis Coded Modulation (TCM) encoding on the interleaved data, and transmitting a Radio Frequency (RF) digital broadcast signal including the TCM-encoded data, the DTV receiver comprising:
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a tuner for receiving the RF digital broadcast signal containing first service data corresponding to the conventional input data and second service data corresponding to the additional input data; a demodulator for demodulating the broadcast signal; a TCM decoder for performing trellis decoding on the first and second service data in the demodulated broadcast signal for first error correction in order to correct errors in the first and second service data that occurred during reception of the broadcast signal, and for outputting the first and second service data as a soft signal; and an additional error correction decoder for decoding the trellis-decoded second service data for second error correction in order to additionally correct errors in the second service data that occurred during the reception of the broadcast signal. - View Dependent Claims (17, 18)
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19. A method of processing a digital broadcast signal generated from additional error correction encoding additional input data, multiplexing the encoded additional input data with conventional input data, Reed-Solomon (RS) encoding the multiplexed input data, interleaving the RS-encoded data, performing Trellis Coded Modulation (TCM) encoding on the interleaved data, and transmitting a Radio Frequency (RF) digital broadcast signal including the TCM-encoded data, the method comprising:
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receiving, through a digital television (DTV) receiver, the RF digital broadcast signal containing first service data corresponding to the conventional input data and second service data corresponding to the additional input data; demodulating the received RF digital broadcast signal; performing trellis decoding on the first and second service data in the demodulated broadcast signal for first error correction in order to correct errors in the first and second service data that occurred during reception of the broadcast signal; outputting the first and second service data as a soft signal; and decoding the trellis-decoded second service data for second error correction in order to additionally correct errors in the second service data that occurred during the reception of the broadcast signal. - View Dependent Claims (20, 21)
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22. A method of processing a digital broadcast signal generated from additional error correction encoding additional input data, multiplexing the encoded additional input data with conventional input data, Reed-Solomon (RS) encoding the multiplexed input data, interleaving the RS-encoded data, performing Trellis Coded Modulation (TCM) encoding on the interleaved data, and transmitting a Radio Frequency (RF) digital broadcast signal including the TCM-encoded data, the method comprising:
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receiving, a digital television (DTV) receiver, the RF digital broadcast signal containing first service data corresponding to the conventional input data and second service data corresponding to the additional input data; demodulating at least one of the first service data and second service data included in the received RF digital broadcast signal; performing trellis decoding on the second service data in the demodulated broadcast signal for first error correction in order to correct errors in the second service data that occurred during reception of the broadcast signal; outputting the second service data as a soft signal form; and decoding the trellis-decoded second service data for second error correction in order to additionally correct errors in the second service data that occurred during the reception of the broadcast signal. - View Dependent Claims (23, 24)
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Specification