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公开(公告)号：US3705357A
公开(公告)日：1972-12-05
申请号：US3705357D
申请日：1971-03-23
Applicant: IBM
Inventor： CARTER WILLIAM C , JESSEP DONALD C JR , WADIA ASPI B
CPC classification number: H03K19/007
Abstract: The present invention relates to a logic circuit for testing the condition of a set of self-testing logic variables. More specifically, it relates to such a logic circuit for forming an Exclusive-Or function on such variables. The circuit has particular utility in high reliability systems for checking the conditions of a plurality of line pairs wherein each line pair constitutes a morphic self-testing variable and wherein the circuit output is itself a morphic self-testing function.
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公开(公告)号：US3688265A
公开(公告)日：1972-08-29
申请号：US3688265D
申请日：1971-03-18
Applicant: IBM
Inventor： CARTER WILLIAM C , HENLE ROBERT A , JESSEP DONALD C JR , WADIA ASPI B
IPC: G06F11/10 , G06F11/267 , G08C25/00 , G06F11/00
CPC classification number: G06F11/1044 , G06F11/2215
Abstract: A translator for a digital memory system which performs single error correction and double error detection (SEC/DED) upon the stored word in converting it into a parity-encoded form and in addition detects circuit failures in the translator itself. The translator also takes a parity-encoded word, checks the parity encoding, translates the word into an SEC/DED form and writes it into memory. The translator consists of a syndrome generator, a single error corrector, a double error detector, a byte parity encoder, a byte parity checker and a circuit to implement a check on the parity-encoded form of the word which is read. The paritycheck matrix used in formulating the SEC/DED encoded form of the word has the following properties: Property 1: The columns of the parity check matrix are a minimum Hamming distance of 2 apart. Property 2: Each column of the parity check matrix is odd weight. Property 3: If there are r check bits C(j), m bytes with parity bits P(i), and odd parity is used, then
Abstract translation: 一种用于数字存储器系统的翻译器，其对存储的字执行单个纠错和双重错误检测（SEC / DED），将其转换为奇偶校验编码形式，并且还检测翻译器本身中的电路故障。 翻译器还采用奇偶校验编码的字，检查奇偶编码，将该字翻译成SEC / DED格式，并将其写入内存。 翻译器由校正子发生器，单个误差校正器，双重误差检测器，字节奇偶编码器，字节奇偶校验器和用于对读取的字的奇偶校验编码形式进行检查的电路组成。 用于制定SEC / DED编码形式的奇偶校验矩阵具有以下属性：
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公开(公告)号：CA2019527A1
公开(公告)日：1991-03-20
申请号：CA2019527
申请日：1990-06-21
Applicant: IBM
Inventor： GUNDERSEN STEVEN C , WADIA ASPI B
Abstract: Apparatus and methods are described which take advantage of the peculiar characteristics of dynamic signature data while segmenting and compressing such data for storage on a limited capacity device. Compression is accomplished by digital oversampling, segmenting, filtering, decimating and later interpolating reference signature data, thereby allowing storage in compressed form without significant matching degradation. The pen down and pen up information which define signature segments is separated from the pressure waveform and stored in a separate array for each reference signature. The acceleration and pressure data are then filtered, decimated and stored for each reference signature. Later, during identity verification, the stored acceleration and pressure data are restored to an oversampled rate by interpolation. To verify the identity of a person supplying a trial signature, each segment of the trial signature is compared with corresponding segments of one or more of the stored reference signatures.
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Patent Agency Ranking
公开(公告)号：CA992210A
公开(公告)日：1976-06-29
申请号：CA170775
申请日：1973-05-04
Applicant: IBM
Inventor： CARTER WILLIAM C , WADIA ASPI B
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公开(公告)号：CA2019527C
公开(公告)日：1996-01-30
申请号：CA2019527
申请日：1990-06-21
Applicant: IBM
Inventor： GUNDERSEN STEVEN C , WADIA ASPI B
IPC: G07F7/12 , G06F3/041 , G06F3/048 , G06K9/00 , G06K17/00 , G06T7/00 , G07C9/00 , G06K9/68 , G06F17/40 , G06K9/62
Abstract: Apparatus and methods are described which take advantage of the peculiar characteristics of dynamic signature data while segmenting and compressing such data for storage on a limited capacity device. Compression is accomplished by digital oversampling, segmenting, filtering, decimating and later interpolating reference signature data, thereby allowing storage in compressed form without significant matching degradation. The pen down and pen up information which define signature segments is separated from the pressure waveform and stored in a separate array for each reference signature. The acceleration and pressure data are then filtered, decimated and stored for each reference signature. Later, during identity verification, the stored acceleration and pressure data are restored to an oversampled rate by interpolation. To verify the identity of a person supplying a trial signature, each segment of the trial signature is compared with corresponding segments of one or more of the stored reference signatures.
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公开(公告)号：DE69019095T2
公开(公告)日：1995-12-21
申请号：DE69019095
申请日：1990-08-09
Applicant: IBM
Inventor： GUNDERSEN STEVEN C , WADIA ASPI B
Abstract: Apparatus and methods are described which take advantage of the peculiar characteristics of dynamic signature data while segmenting and compressing such data for storage on a limited capacity device. Compression is accomplished by digital oversampling, segmenting, filtering, decimating and later interpolating reference signature data, thereby allowing storage in compressed form without significant matching degradation. The pen down and pen up information which define signature segments is separated from the pressure waveform and stored in a separate array for each reference signature. The acceleration and pressure data are then filtered, decimated and stored for each reference signature. Later, during identity verification, the stored acceleration and pressure data are restored to an oversampled rate by interpolation. To verify the identity of a person supplying a trial signature, each segment of the trial signature is compared with corresponding segments of one or more of the stored reference signatures.
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公开(公告)号：DE69019095D1
公开(公告)日：1995-06-08
申请号：DE69019095
申请日：1990-08-09
Applicant: IBM
Inventor： GUNDERSEN STEVEN C , WADIA ASPI B
Abstract: Apparatus and methods are described which take advantage of the peculiar characteristics of dynamic signature data while segmenting and compressing such data for storage on a limited capacity device. Compression is accomplished by digital oversampling, segmenting, filtering, decimating and later interpolating reference signature data, thereby allowing storage in compressed form without significant matching degradation. The pen down and pen up information which define signature segments is separated from the pressure waveform and stored in a separate array for each reference signature. The acceleration and pressure data are then filtered, decimated and stored for each reference signature. Later, during identity verification, the stored acceleration and pressure data are restored to an oversampled rate by interpolation. To verify the identity of a person supplying a trial signature, each segment of the trial signature is compared with corresponding segments of one or more of the stored reference signatures.
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8.发明专利
公开(公告)号：CA993999A
公开(公告)日：1976-07-27
申请号：CA167868
申请日：1973-03-28
Applicant: IBM
Inventor： CARTER WILLIAM C , HSIEH EDWARD P , WADIA ASPI B
Abstract: Novel error correction and detection codes and self-checking translators therefor are disclosed. A first of these codes is a t b-adjacent bit group error correcting and t+d b-adjacent d-adjacent bit group error detecting code using a quantity of 2t+d groups of b check bits. This code with a b-bit BSM (basic storage module) memory organization is capable of correcting b-adjacent errors due to failures in any t basic storage modules, detecting b-adjacent errors due to failures in any t+d basic storage modules, and, because of the translator design, detecting with high probability b-adjacent errors in 2t+2d-1 storage modules where 1
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