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公开(公告)号：US11923871B2
公开(公告)日：2024-03-05
申请号：US17341875
申请日：2021-06-08
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC分类号： H03M13/255 , H03M13/1102 , H03M13/1111 , H03M13/19 , H03M13/35 , H03M13/6362 , H04L1/00
摘要： One coding scheme is selected from a plurality of coding schemes, an information sequence is encoded by using the selected coding scheme, and an obtained encoded sequence is modulated to obtain a modulated signal. The obtained modulated signal is subjected to a phase change and is transmitted. The plurality of coding schemes include at least a first coding scheme and a second coding scheme. The first coding scheme is a coding scheme with a first coding rate for forming a generated first codeword as a first encoded sequence by using a first parity check matrix. The second coding scheme is a coding scheme with a second coding rate obtained after puncturing processing, for generating a second encoded sequence by performing the puncturing processing on a generated second codeword by using a second parity check matrix different from the first parity check matrix. The number of bits of the first encoded sequence is equal to the number of bits of the second encoded sequence.
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公开(公告)号：US11063609B2
公开(公告)日：2021-07-13
申请号：US16801234
申请日：2020-02-26
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
摘要： One coding scheme is selected from a plurality of coding schemes, an information sequence is encoded by using the selected coding scheme, and an obtained encoded sequence is modulated to obtain a modulated signal. The obtained modulated signal is subjected to a phase change and is transmitted. The plurality of coding schemes include at least a first coding scheme and a second coding scheme. The first coding scheme is a coding scheme with a first coding rate for forming a generated first codeword as a first encoded sequence by using a first parity check matrix. The second coding scheme is a coding scheme with a second coding rate obtained after puncturing processing, for generating a second encoded sequence by performing the puncturing processing on a generated second codeword by using a second parity check matrix different from the first parity check matrix. The number of bits of the first encoded sequence is equal to the number of bits of the second encoded sequence.
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公开(公告)号：US10666386B2
公开(公告)日：2020-05-26
申请号：US16261881
申请日：2019-01-30
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
摘要： One coding method is selected from a plurality of coding methods per data symbol group, an information sequence is encoded by using the selected coding method. The plurality of coding methods includes at least a first coding method and a second coding method. The first coding method is a coding method with a first coding rate for generating a first codeword as a first encoded sequence by using a first parity check matrix. The second coding method is a coding method with a second coding rate different from the first coding rate and obtained after puncturing processing, where a second encoded sequence is generated by performing the puncturing processing on a second codeword by using a second parity check matrix different from the first parity check matrix. A number of bits of the first encoded sequence is equal to a number of bits of the second encoded sequence.
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公开(公告)号：US10271082B2
公开(公告)日：2019-04-23
申请号：US15285736
申请日：2016-10-05
发明人： Toshiyasu Sugio , Youji Shibahara , Yuki Maruyama , Toru Matsunobu , Yoichi Sugino , Mikihiro Ouchi , Hisao Sasai , Kuniaki Isogai , Ryuji Muta , Takako Hori , Tomoaki Itoh
IPC分类号： H04N21/262 , H04N21/218 , H04N21/2187 , H04N21/2665 , H04N7/18 , H04N21/234
摘要： A video distribution method is a video distribution method to be performed by a server that distributes a plurality of videos captured by a plurality of users from different viewpoints to a terminal apparatus. The video distribution method includes distributing, from a server to a terminal apparatus, a first video that is one of a plurality of videos captured by a plurality of users from different viewpoints and that is requested by the terminal apparatus, selecting a second video that is one of the plurality of videos and that is likely to be next requested next time by the terminal apparatus, and starting transmission of the second video to the terminal apparatus during distribution of the first video to the terminal apparatus.
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公开(公告)号：US10237015B2
公开(公告)日：2019-03-19
申请号：US15284601
申请日：2016-10-04
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
摘要： One coding method is selected from a plurality of coding methods per data symbol group, an information sequence is encoded by using the selected coding method. The plurality of coding methods includes at least a first coding method and a second coding method. The first coding method is a coding method with a first coding rate for generating a first codeword as a first encoded sequence by using a first parity check matrix. The second coding method is a coding method with a second coding rate different from the first coding rate and obtained after puncturing processing, where a second encoded sequence is generated by performing the puncturing processing on a second codeword by using a second parity check matrix different from the first parity check matrix. A number of bits of the first encoded sequence is equal to a number of bits of the second encoded sequence.
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公开(公告)号：US09628159B2
公开(公告)日：2017-04-18
申请号：US15011706
申请日：2016-02-01
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC分类号： H04B7/0456 , H04B7/046 , H04B7/0615 , H04B7/0682
摘要： A transmission device comprising: a weighting circuity which, in operation, generates transmission signals of n streams (n is an integer of 3 or more) by weighting modulated signals of the n streams using a predetermined fixed precoding matrix; a phase changing circuity which, in operation, regularly changes each phase of a symbol series included in each of the transmission signals of the n streams; and a transmitter which, in operation, transmits the transmission signals of the n streams from different antennas, the phases of each of the transmission signals of the n streams being changed in each symbol, wherein the transmission signal of an i-th stream has an mi kind of phase change value yi(t) (i is an integer between 1 and n (inclusive), 0≦yi
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公开(公告)号：US10700811B2
公开(公告)日：2020-06-30
申请号：US16391939
申请日：2019-04-23
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
摘要： A decoding device includes: a BP decoder that performs BP decoding on an input signal; a maximum likelihood decoder that performs maximum likelihood decoding on a signal subjected to the BP decoding; and a selector that selects one of the input signal, the signal subjected to the BP decoding, and a signal subjected to the maximum likelihood decoding. In a configuration of the decoding device, when a decoder is appropriately operated according to quality of data, a calculation scale can be reduced, and power consumption can be decreased.
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公开(公告)号：US10326554B2
公开(公告)日：2019-06-18
申请号：US15618404
申请日：2017-06-09
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
摘要： A decoding device includes: a BP decoder that performs BP decoding on an input signal: a maximum likelihood decoder that performs maximum likelihood decoding on a signal subjected to the BP decoding; and a selector that selects one of the input signal, the signal subjected to the BP decoding, and a signal subjected to the maximum likelihood decoding. In a configuration of the decoding device, when a decoder is appropriately operated according to quality of data, a calculation scale can be reduced, and power consumption can be decreased.
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公开(公告)号：US09854279B2
公开(公告)日：2017-12-26
申请号：US14847361
申请日：2015-09-08
发明人： Mihail Petrov , Frank Herrmann , Tomohiro Kimura , Mikihiro Ouchi
IPC分类号： H04N21/23 , H04N21/43 , H04N21/61 , H04N21/236 , H04L12/861 , H04N21/2389 , H04N21/4385 , H04N21/434 , H04L29/06
CPC分类号： H04N21/23608 , H04L49/9057 , H04L49/9094 , H04L69/04 , H04L69/22 , H04N21/2389 , H04N21/4344 , H04N21/4385 , H04N21/6112
摘要： A demultiplexer 630 routes only one or more transport stream packets with a single packet identifier value to each physical layer pipe. A header compression unit 620 replaces the packet identifier of the transport stream packet with a short packet identifier of one bit length indicating at least whether the transport stream packet is a NULL packet.
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公开(公告)号：US09749104B2
公开(公告)日：2017-08-29
申请号：US14868877
申请日：2015-09-29
发明人： Mihail Petrov , Tomohiro Kimura , Mikihiro Ouchi
CPC分类号： H04L5/0048 , H04B7/02 , H04B7/0613 , H04L25/0224 , H04L27/2611 , H04L27/2613 , H04L27/2627 , H04L27/2649
摘要： The present invention relates to orthogonal frequency-division multiplexing (OFDM) communication systems with four transmit antennas and one or more receive antennas, and in particular to methods for inserting scattered pilots (SPs) into the transmit signals of such OFDM systems, for estimating channel properties on the basis of the scattered pilots, a multi-antenna OFDM transmitter, and an OFDM receiver. In this context, it is the particular approach of the present invention to keep the same SP pattern like in the single-transmitter case, to partition the pilots into as many subsets as there are transmitters (transmit antennas), and to interleave these subsets both in time and in frequency. In this manner, the granularity of pilots of the same subset is reduced. This offers increased flexibility in designing the scattered pilot patterns and greater accuracy of the estimated channel properties.
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