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公开(公告)号：US20190341940A1
公开(公告)日：2019-11-07
申请号：US16516514
申请日：2019-07-19
Inventor： Sung-Ik PARK , Sun-Hyoung KWON , Bo-Mi LIM , Jae-Young LEE , Heung-Mook KIM , Nam-Ho HUR
Abstract: A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 16200 and a code rate of 4/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 64-symbol mapping.
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52.发明申请公开(公告)号：US20190296841A1
公开(公告)日：2019-09-26
申请号：US16436621
申请日：2019-06-10
Inventor： Sung-Ik PARK , Sun-Hyoung KWON , Jae-Young LEE , Heung-Mook KIM , Nam-Ho HUR
Abstract: An apparatus and method for generating a broadcast signal frame using enhanced layer dummy values are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling time interleaver information corresponding to the time interleaver, the time interleaver uses one of time interleaver groups, and enhanced layer data corresponding to the one of the time interleaver groups include dummy values.
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公开(公告)号：US20190260508A1
公开(公告)日：2019-08-22
申请号：US16401006
申请日：2019-05-01
Inventor： Sung-Ik PARK , Sun-Hyoung KWON , Jae-Young LEE , Heung-Mook KIM , Nam-Ho HUR
Abstract: A modulator and a modulation method using a non-uniform 16-symbol signal constellation are disclosed. The modulator includes a memory and a processor. The memory receives a codeword corresponding to a low-density parity check (LDPC) code having a code rate of 2/15. The processor maps the codeword to 16 symbols of the non-uniform 16-symbol signal constellation on a 4-bit basis.
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54.发明申请公开(公告)号：US20180145843A1
公开(公告)日：2018-05-24
申请号：US15793650
申请日：2017-10-25
Inventor： Dong-Joon CHOI , Joon-Young JUNG , Nam-Ho HUR
CPC classification number: H04L12/2801 , H04L65/1066 , H04L65/4076 , H04L2012/5615 , H04M7/125 , H04N21/242 , H04N21/6168
Abstract: Disclosed herein is a synchronization method for transmitting a DOCSIS upstream signal, which is performed by an RoIP terminal, the synchronization method including receiving a synchronization (SYNC) message periodically sent by a Cable Modem Termination System (CMTS) and thereby synchronizing a clock and generating a reference time; receiving a ranging request signal from a Cable Modem (CM); including information about a start time of an allocated ranging interval in the ranging request signal, converting the ranging request signal into an IP packet, and transmitting the IP packet to an RoIP headend device over an IP network in order to enable the RoIP headend device to convert the ranging request signal, delivered via the IP network, into an RF signal and transmit the RF signal to the CMTS; and converting a ranging response message delivered from the CMTS into an electric signal and transmitting the electric signal to the CM.
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公开(公告)号：US20180019764A1
公开(公告)日：2018-01-18
申请号：US15703822
申请日：2017-09-13
Inventor： Sung-Ik PARK , Sun-Hyoung KWON , Bo-Mi LIM , Jae-Young LEE , Heung-Mook KIM , Nam-Ho HUR
CPC classification number: H03M13/2767 , H03M13/1165 , H03M13/255 , H03M13/2778 , H03M13/2792 , H04L1/0057 , H04L1/0071 , H04L2001/0093
Abstract: A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 16200 and a code rate of 2/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 64-symbol mapping.
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Patent Agency Ranking
公开(公告)号：US20180006663A1
公开(公告)日：2018-01-04
申请号：US15709191
申请日：2017-09-19
Inventor： Sung-Ik PARK , Heung-Mook KIM , Sun-Hyoung KWON , Nam-Ho HUR
CPC classification number: H03M13/1102 , H03M13/116 , H03M13/1177 , H03M13/1185 , H03M13/255 , H03M13/616
Abstract: A low density parity check (LDPC) encoder, an LDPC decoder, and an LDPC encoding method are disclosed. The LDPC encoder includes first memory, second memory, and a processor. The first memory stores an LDPC codeword having a length of 64800 and a code rate of 4/15. The second memory is initialized to 0. The processor generates the LDPC codeword corresponding to information bits by performing accumulation with respect to the second memory using a sequence corresponding to a parity check matrix (PCM).
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57.发明申请公开(公告)号：US20170279550A1
公开(公告)日：2017-09-28
申请号：US15461231
申请日：2017-03-16
Inventor： Sung-Ik PARK , Sun-Hyoung KWON , Jae-Young LEE , Heung-Mook KIM , Nam-Ho HUR
CPC classification number: H04H20/42 , H04H20/426 , H04H60/07 , H04H60/73 , H04L1/0041 , H04L1/0045 , H04L1/0057 , H04L1/007 , H04L1/0071 , H04L1/0075 , H04L27/2601 , H04L27/2615 , Y02D70/00 , Y02D70/166 , Y02D70/168
Abstract: An apparatus and method for generating a broadcast signal frame using enhanced layer dummy values are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling time interleaver information corresponding to the time interleaver, the time interleaver uses one of time interleaver groups, and enhanced layer data corresponding to the one of the time interleaver groups include dummy values.
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58.发明申请公开(公告)号：US20170201336A1
公开(公告)日：2017-07-13
申请号：US15323944
申请日：2015-07-03
Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , R&DB FOUNDATION, KOREA MARITIME AND OCEAN UNIVERSITY
Inventor： Sung-Ik PARK , Sun-Hyoung KWON , Jeong-Chang KIM , Jae-Young LEE , Heung-Mook KIM , Nam-Ho HUR
CPC classification number: H04H20/423 , H04H20/42 , H04J11/004 , H04L1/0071 , H04L27/26 , H04L27/2613 , H04L27/3488 , H04L69/323 , Y02D70/00 , Y02D70/168
Abstract: A broadcast signal transmission apparatus and method using layered division multiplexing are disclosed. A broadcast signal transmission apparatus according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; a frame builder configured to generate a broadcast signal frame using the time-interleaved signal; and an orthogonal frequency division multiplexing (OFDM) transmitter configured to generate a pilot signal that is shared by a core layer corresponding to the core layer signal and an enhanced layer corresponding to the enhanced layer signal.
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公开(公告)号：US20170149447A1
公开(公告)日：2017-05-25
申请号：US15425692
申请日：2017-02-06
Inventor： Sung-Ik PARK , Heung-Mook KIM , Sun-Hyoung KWON , Nam-Ho HUR
CPC classification number: H03M13/1165 , H03M13/036 , H03M13/2792 , H03M13/6505 , H04L1/0043 , H04L1/0057 , H04L1/0058
Abstract: A low density parity check (LDPC) encoder, an LDPC decoder, and an LDPC encoding method are disclosed. The LDPC encoder includes first memory, second memory, and a processor. The first memory stores an LDPC codeword having a length of 16200 and a code rate of 4/15. The second memory is initialized to 0. The processor generates the LDPC codeword corresponding to information bits by performing accumulation with respect to the second memory using a sequence corresponding to a parity check matrix (PCM).
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公开(公告)号：US20170126250A1
公开(公告)日：2017-05-04
申请号：US15374609
申请日：2016-12-09
Inventor： Sung-Ik PARK , Sun-Hyoung KWON , Jae-Young LEE , Heung-Mook KIM , Nam-Ho HUR
CPC classification number: H03M13/2792 , G06F11/1076 , H03M13/1102 , H03M13/1151 , H03M13/1165 , H03M13/255 , H03M13/2739 , H03M13/2778 , H03M13/6552
Abstract: A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 64800 and a code rate of 3/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 64-symbol mapping.
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