| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 221 | Method and apparatus for random shuffled turbo multiuser detector | US10134330 | 2002-04-29 | US06981203B2 | 2005-12-27 | Diane G. Mills |
| A multi-user turbo decoder combining multi-user detection and forward error correction decoding is disclosed in which randomly ordered indices are assigned to interfering users before a decoding tree is constructed in the multi-user decoder for each symbol interval for every iteration and for each new block of data. By building the decoding tree in this manner for each symbol interval, a reduced complexity search is more likely to include paths (and nodes) in the tree containing the correct value for the channel symbols. All users thus share in the benefit of root level placement in the decoding tree. In an alternative embodiment of the invention only one decoding pass is accomplished and there is no re-construction of the decoding tree based on further random index ordering for iterative decoding. No modification to the transmitted signaling method is needed. | ||||||
| 222 | Method and apparatus for data reproducing using iterative decoding in a disk drive | US10995070 | 2004-11-23 | US20050120286A1 | 2005-06-02 | Manabu Akamatsu |
| A disk drive using a read/write channel including an iteration decoder for performing iterative decoding processing is disclosed. The iteration decoder has an RLL error detector for detecting a burst error portion from an LLR group output from the channel decoder, and an LLR adjuster. The LLR adjuster makes adjustment by reducing the value of the LLR group corresponding to the detected burst error portion. | ||||||
| 223 | Method for improving the performance of a coding in a radio communication system | US10485507 | 2004-02-02 | US20040184553A1 | 2004-09-23 | Ari Hottinen |
| The invention relates to a method for improving the performance of data transmissions over a communications channel, wherein data is coded and modulated for transmission, wherein coding said data results in differently coded bits. In order to allow for a simple way of a more flexible coding, it is proposed that said differently coded bits are mapped for modulation to different modulation symbols of a symbol alphabet, to which modulation symbols different relative reliabilities are assigned, and wherein by mapping said coded bits to said modulation symbols, different reliabilities are associated to differently coded bits depending on the conditions on said communications channel. The invention equally relates to a corresponding communications system and to elements of such a communications system. | ||||||
| 224 | Quantizing signals using sparse generator factor graph codes | US10672919 | 2003-09-26 | US06771197B1 | 2004-08-03 | Jonathan S. Yedidia; Emin Martinian |
| A method quantizes an input signal of N samples into a string of k symbols drawn from a q-ary alphabet. A complementary method reproduces a minimally distorted version of the input signal from the quantized string, given some distortion measure. First, an [N,k]q linear error-correcting code that has a sparse generator factor graph representation is selected. A fixed mapping from q-ary symbols to samples is selected. A soft-input decoder and an encoder for the SGFG codes is selected. A cost function is determined from the input signal and a distortion measure, using the fixed mapping. The decoder determines an information block corresponding to a code word of the SGFG code with a low cost for the input signal. The input signal can be reproduced using the encoder for the SGFG code, in combination with the fixed mapping. | ||||||
| 225 | Method and configuration for decoding information | US10149232 | 2002-09-25 | US06677865B1 | 2004-01-13 | Wen Xu |
| A method and system for decoding information that is output by an information source and transmitted in coded fashion via a transmission channel affected by interference, wherein the influence of statistical information, which is applied along side the transmitted information via the information source, on the decoding is modified as a function of the reliable of the decoding. | ||||||
| 226 | Method for channel decoding a data stream containing useful data and redundant data, device for channel decoding, computer-readable storage medium and computer program element | US10257724 | 2003-02-24 | US20030156663A1 | 2003-08-21 | Frank Burkert; Ralf Buschmann; Gero Base |
| The data stream contains useful data and redundant data and at least one source-coded error-containing bit sequence that characterizes a given position within the data stream. The source-coded, error-free bit sequence is known by the channel decoder. The data stream is channel-decoded and the source-coded, error-containing bit sequence is determined from the channel-coded data stream. The data stream is once again channel-decoded, wherein the data stream is once again channel decoded taking into account the detected source coded, error-containing bit sequence. | ||||||
| 227 | Hard-output iterative decoder | US09983564 | 2001-10-25 | US20030101402A1 | 2003-05-29 | Ofer Amrani; Meir Ariel |
| A decoder, for decoding a data sequence received from a noisy channel into an estimate of an input sequence, comprises a soft-decision decoder combined with a soft-input calculator. The decoder and calculator are interconnected, and jointly converge on an output which is an estimate of a transmitted sequence. | ||||||
| 228 | nB2P coding/decoding device | US941214 | 1997-09-30 | US5940018A | 1999-08-17 | Jin-Young Kim; Bhum-Cheol Lee; Kwon-Chul Park |
| An nB2P coding/decoding device having a line code function facilitating data transmission and data recovery in the transmission line or link, and a function of a channel code for detecting errors in the recovered data, is provided, including: an nB2P coding device for dividing n bit width parallel data into two data units each having a predetermined bit width, and serial-transmitting the resulting n+2 bit coded data to which two odd parity bits are added, with predetermined n+2 bit with block synchronization data which is orthogonal to the coded data; and an nB2P decoding device for detecting the block synchronization data from the serially transmitted data, converts serial data to parallel form of n+2 bits, checking for errors in the coded data using the odd parity, and removing the odd parity to decode them into the original n bit width parallel data. | ||||||
| 229 | Process of selectively protecting information bits against transmission errors | US745554 | 1996-11-12 | US5850403A | 1998-12-15 | Xavier Lasne |
| Based on the sequence of the information bits to be transmitted, the coder forms a second sequence of bits c.sub.n, which includes a redundant subset. A differential coding of the form d.sub.n =c.sub.n .sym.d.sub.f(n) with f(n)<n produces a third sequence of bits d.sub.n. The signal sent represents the bits of the third sequence in a specified order. Having obtained likelihood data r.sub.n associated with the bits d.sub.n, the receiver calculates estimates of the bits c.sub.n of the redundant subset as a function of the sign of r.sub.n .multidot.r.sub.f(n). By exploiting the redundancy, the receiver can detect the bits c.sub.n of the subset having erroneous estimates, and rectify the sign of the less reliable of the two associated likelihood data items r.sub.n and r.sub.f(n). The other bits c.sub.n ' of the second sequence then benefit from additional protection if there is at least one bit c.sub.n of the redundant subset such that n'=f(n) or f(n')=n or f(n). | ||||||
| 230 | 공동 보안 어드벤스드 LDPC 암호화 코딩 방법 및 장치 | KR1020150094780 | 2015-07-02 | KR1020160098004A | 2016-08-18 | 피섹에란; 아부-슈라샤디 |
| 본발명의다양한실시예에따른송신장치는, 일반텍스트데이터를유효부호율(Re)에따라인코딩하여암호화텍스트데이터를출력하는제1 인코더와, 상기암호화텍스트데이터에대응하는제1 인코딩블록을인코딩하여제2 인코딩블록을출력하는제2 인코더를포함하고, 상기유효부호율(Re)은, Re=R/(1-Rpunc)에의해정의되며, 여기서 R은부호율을나타내고, Rpunc은펑처링율을나타내며, 상기제1 인코딩블록은, Zp x Rs x 2n 비트를포함하고, 상기제2 인코딩블록은, Zp x 2n 비트를포함하며, 여기서 n은상기일반텍스트데이터의비트수를나타내고, Zp는리프팅인자를나타내며, Rs는 SLSS 코드율을나타내는것을특징으로한다. | ||||||
| 231 | 디지털 송수신 시스템에서 적응/가변형 변복조 장치 | KR1020090052207 | 2009-06-12 | KR101552359B1 | 2015-09-10 | 김성훈; 이응돈; 최진수; 홍진우; 안충현; 김창중; 이경훤; 이호경 |
| 디지털송수신시스템에서적응/가변형변복조장치를제안한다. 본발명의실시예에따른디지털송신시스템에서적응/가변형변조하는물리계층송신장치는비트스트림을수신하면이를기설정한방법에따라저밀도패리티점검(Low Density Parity Check; LDPC) 부호화할비트스트림과부호화하지않을비트스트림으로분류하는분류부; 상기부호화하지않을비트스트림을기설정한비트수로그룹화하여비부호화비트그룹을출력하는비부호화비트그룹부; 상기부호화할비트스트림을 LDPC 부호화하여부호화비트스트림을출력하는 LDPC 인코더; 상기부호화비트스트림을기설정한비트수로그룹화하여부호화비트그룹을출력하는부호화비트그룹부; 상기부호화비트그룹을이용하여심볼부분집합(coset)을선택하고상기비부호화비트그룹을이용해서상기선택한심볼부분집합에서심볼을결정하는직교진폭변조부; 및, 상기직교진폭변조부에서결정한심볼을컨볼루셔널인터리빙하는컨볼루셔널인터리버를포함한다. | ||||||
| 232 | 반도체 장치 및 반도체 장치에의 데이터 기입 방법 | KR1020120065834 | 2012-06-19 | KR1020120140217A | 2012-12-28 | 오시다다이스께; 후루따시게루; 히로까와마사유끼; 야마자끼아끼라; 후지모리다까시; 시오따시게마사 |
| PURPOSE: A semiconductor device and a method for writing data in the semiconductor device are provided to improve security by not directly transmitting and receiving key and secure information between the semiconductor device and a writing device. CONSTITUTION: A unique code generating unit(12) generates an initial unique code including errors in a random bit as a unique value in a device. A first error correcting unit generates an intermediate unique code by correcting the error of the initial unique code. A second error correcting unit generates a first definite unique code by correcting the error of the intermediate unique code. A decoding unit generates secure information by decoding transmission data using the first definite unique code. The transmission data encodes secure information using key information generated based on the intermediate unique code. [Reference numerals] (11) Identification information maintaining unit; (12) Unique code generating unit; (13) Bit mask circuit; (14) ECC code; (15,23) ECC circuit; (16,26) Hash function decoding unit; (17) Encoding unit; (21) Identification information-mask bit corresponding table; (22) ECC code CRC code table; (24) CRC circuit; (25) Hash function; (AA) Encoding-completed information; (BB) Information to be transmitted | ||||||
| 233 | 무선 랜 시스템 내에서 보이스 컨텐츠의 리던던시 기반디코딩을 위한 방법 및 시스템 | KR1020070074502 | 2007-07-25 | KR100943856B1 | 2010-02-24 | 캐러오구즈,제이헌; 호너리,후먼; 세샤드리,남비라쟌; 트래치프스키,제이슨에이.; 헤어먼,애리 |
| 무선 근거리 통신망(WLAN) 시스템 내에서 보이스 컨텐츠(voice content)의 리던던시 기반 디코딩을 할 수 있는 방법 및 그 시스템의 여러 측면들이 제공된다. 무선 랜 수신기는 수신된 패킷 중 디코딩된 부분이 보이스 컨텐츠를 포함하는지 판정할 수 있고, 보이스 컨텐츠가 포함된 경우에 그 패킷의 나머지 부분을 디코딩하도록 리던던시 기반 디코더를 선택할 수 있다. 리던던시 기반 디코더는 비터비 디코더일 수 있다. 리던던시 기반 디코더는 소정 개수의 연속하는 패킷들을 디코딩하거나, 또는 소정 시간 동안 연속하는 패킷들을 디코딩하는 것으로 선택될 수 있다. 패킷의 나머지 부분들 및 후속 패킷들을 디코딩한 후에는, 무선 랜 수신기는 추가적으로 수신되는 패킷들을 디코딩하도록 표준 비터비 디코더를 선택할 수 있다. 무선 랜 수신기는 리던던시 기반 디코더와 표준 비터비 디코더를 선택할 수 있도록 적어도 하나의 신호를 생성할 수 있다. | ||||||
| 234 | 디지털 방송 송신기 및 수신기와 그 스트림 처리방법들 | KR1020090015844 | 2009-02-25 | KR1020090115045A | 2009-11-04 | 권용식; 이준희 |
| PURPOSE: A digital broadcasting transceiver and stream processing methods thereof are provided to detect whether a transport stream received in a receiving side includes additional data stream, easily. CONSTITUTION: A digital broadcasting transmitter and receiver(200) comprises a receiver, an additional data stream detecting unit, and a processing unit. The receiver(210) receives a transport stream transmitted from a digital broadcasting transmitter. The additional data stream detecting unit determines whether the received transport stream includes additional data stream. The processing unit processes the additional data stream. The transport stream including the additional data stream resets memories used for the trellis encoding in the digital broadcasting transmitter at a predetermined time, and then inserts a training signal. | ||||||
| 235 | 이동 통신 시스템에서 귀환 비트를 이용하여 메시지를 시공간 터보 부호화하여 송신하는 장치 및 방법 | KR1020050019227 | 2005-03-08 | KR100809551B1 | 2008-03-04 | 이재홍; 유치훈 |
| 본 발명은 복수개의 안테나를 구비하는 디지털 이동 통신 시스템에서 시공간 터보 부호로 메시지를 부호화하여 송신하는 장치 및 방법에 있어서, 채널 이득 또는 위상에 대한 귀환 정보를 갖는 귀환 비트를 이용하여 메시지를 부호화하여 송신하는 장치 및 방법에 관한 것이다. 본 발명에 따른 귀환 형태를 사용하는 시공간 터보 부호는 종래의 시공간 터보 부호보다 더 우수한 성능을 나타낸다. | ||||||
| 236 | 모바일 이미징 애플리케이션, 장치구조, 및 서비스 플랫폼구조 | KR1020077010759 | 2005-10-12 | KR1020070085316A | 2007-08-27 | 랄스턴존디; 콜라로프크라시미르디; 선더스스티븐이 |
| Systems and methods are provided for compressing and decompressing still image and video image data in mobile devices. Corresponding mobile device architectures, and service platform architectures for transmitting, storing, editing and transcoding still images and video images over wireless and wired networks and viewing them on display-enabled devices are also provided. | ||||||
| 237 | 암호화와 채널부호화를 동시수행하는 복합부호화방법, 이를적용한 송신장치, 채널복호화와 복호화를 동시수행하는 복합복호화방법, 및 이를 적용한 수신장치 | KR1020050015471 | 2005-02-24 | KR1020060094361A | 2006-08-29 | 이경희; 쿠룩이브즈; 린스키이브즈; 서제이베자티프; 정태철 |
| 복합부호화방법, 이를 적용한 송신장치, 복합복호화방법, 및 이를 적용한 수신장치가 제공된다. 본 송신장치는 소스코딩된 메세지를 복합부호화하고 복합부호화된 메세지를 출력함으로서 소스코딩된 메세지에 대한 암호화와 채널부호화를 동시에 수행하는 복합부호화부를 포함하고, 본 수신장치는 잡음부가 복합부호화된 메세지를 복합복호화하여 소스코딩된 메세지를 출력함으로서 잡음부가 복합부호화된 메세지에 대한 채널복호화와 복호화를 동시에 수행하는 복합복호화부를 포함한다. 이에 의해, 송/수신장치에서 각각 하나의 블럭이 하나의 알고리즘을 이용하여 암호화와 채널부호화 / 채널복호화와 복호화를 동시수행할 수 있게 되므로, 메세지처리가 단순화되고 처리속도가 증가되게 된다. 암호화, 복호화, 채널부호화, 채널복호화, 복합부호화, 복합복호화 | ||||||
| 238 | VOICE QUALITY MONITORING SYSTEM | EP16726688.1 | 2016-05-05 | EP3292674A1 | 2018-03-14 | KIM, Doh-Suk |
| This disclosure falls into the field of voice communication systems, more specifically it is related to the field of voice quality estimation in a packet based voice communication system. In particular the disclosure provides methods, computer program products and devices for reducing a prediction error of the voice quality estimation by considering forward error correction of lost voice packets. | ||||||
| 239 | METHOD AND SYSTEM FOR PROVIDING LOW DENSITY PARITY CHECK (LDPC) CODING FOR SCRAMBLED CODED MULTIPLE ACCESS (SCMA) | EP17185474.8 | 2011-01-12 | EP3261259A1 | 2017-12-27 | Lin-Nan, Lee; Mustafa, Eroz |
A multiple access scheme is described. One or more encoders are configured to encode a plurality of bit streams using Low Density Parity Check (LDPC) coding. The bit streams correspond to a respective plurality of terminals. The plurality of bit streams are converted to provide a multiple access scheme for the terminals.
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| 240 | ERROR DETECTION CONSTANTS OF SYMBOL TRANSITION CLOCKING TRANSCODING | EP15816567.0 | 2015-11-24 | EP3224979A1 | 2017-10-04 | SENGOKU, Shoichiro |
| Apparatus, systems and methods for error detection in transmissions on a multi-wire interface are disclosed. A method for correcting transmission errors in multi-wire transition-encoded interface may include determining whether a symbol error is present in the sequence of symbols based on a value of an error detection code (EDC) in the received plurality of bits, generating one or more permutations of the sequence of symbols, where each permutation includes one symbol that is different from corresponding symbols in the sequence of symbols and different from corresponding symbols in other permutations. A permutation in the one or more permutations may be identified as including a corrected sequence of symbols when it produces a decoded EDC value that matches an expected EDC value. The expected EDC value may correspond to a predefined value for EDCs transmitted over the multi-wire interface to enable detection of up to two symbol errors at the receiver. | ||||||
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