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公开(公告)号：CA1108766A
公开(公告)日：1981-09-08
申请号：CA325935
申请日：1979-04-20
Applicant: SONY CORP
Inventor： DOI TOSHITADA , IGA AKIRA
Abstract: In a digital signal transmission system, a predetermined number of words of digital information signals are added bit by bit in a modulo 2 adder to produce a first parity signal. The information signals and the first parity signal are delayed so as to have different delay times to each other, and the signals thus delayed are again added bit by bit in a modulo 2 adder to produce a second parity signal. The predetermined number of words of information signals and the first and second parity signals are Aerially transmitted through a transmission line.
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公开(公告)号：FR2476943A1
公开(公告)日：1981-08-28
申请号：FR8103784
申请日：1981-02-25
Applicant: SONY CORP
Inventor： DOI TOSHITADA , ODAKA KENTAROU
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公开(公告)号：DE3038066A1
公开(公告)日：1981-04-23
申请号：DE3038066
申请日：1980-10-08
Applicant: SONY CORP
Inventor： TANAKA MASATO , FURUKAWA SHUNSUKE , IWAMOTO IKUO , DOI TOSHITADA
Abstract: A method and appratus are provided for communicating a sequence of digital information words. The information words are separated into a sequence of odd information words and a sequence of even information words. The separated odd and even information words are time-displaced from each other by a predetermined amount. The odd information words are encoded in an error-correcting code, and the even information words are separately encoded in a similar error-correcting code. The encoded time-displaced odd and even information words are combined into a transmission block, and this transmission block is transmitted or recorded. In one embodiment, the information words are encoded by generating an error-correcting word in response to the odd information words and by generating an error-correcting word in response to the even information words. The respective error-correcting words are interleaved with the odd and even information words. To recover the original information words, the transmission block is received and the odd and even information words are decoded so as to correct errors therein. The time displacement between the decoded off and even information words are removed. If an information word contains an uncorrected error therein, a correct information word is approximated therefor by interpolating adjacent decoded odd or even information words so as to approximate a correct even or odd information word, respectively. A corrected sequence of information words formed of the decoded and approximated information words is recovered.
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公开(公告)号：CA1097819A
公开(公告)日：1981-03-17
申请号：CA293317
申请日：1977-12-19
Applicant: SONY CORP
Inventor： DOI TOSHITADA , ITO TAKASHI
Abstract: DIGITAL SIGNAL TRANSMISSION METHOD Groups of primary multi-bit digital signals arranged in digital words are spaced apart in sequence and are interleaved with related groups of secondary multi-bit digital signals, each of which is derived from, and encodes substantially the same information as, one of the primary signals. To minimize errors in processing signals, either the primary signals are delayed relative to the secondary signals, or vice versa, before they are interleaved. Cyclic redundancy check code signals are derived for each group of primary signals and each group of secondary signals and are interleaved in sequence with the primary and secondary signals. At a further stage in processing the signals, the checked code signals are analized and the related pairs of primary and secondary signals, which have been brought back into coincidence, are checked to determine whether one or both of the primary and the secondary signals of each related pair has been processed without error. If only one of the signals has been processed without error, that signal is selected for further processing. If both signals have been processed without error a predetermined one of them is selected for further processing. If neither one of them has been processed without error, the immediately preceding signal that was selected may be selected a second time. In order to incorporate all of the signals in S0968 the most convenient format, the secondary signals may comprise only the higher bit orders of the primary signals, eliminating some of the lower bit orders as containing unnecessarily detailed information. The number of bits thus omitted preferrably causes a group of secondary signals plus the cyclic redundancy check code signals for that group and for the related primary group to equal the total number of bits of that primary group.
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Patent Agency Ranking
公开(公告)号：IT8119989D0
公开(公告)日：1981-02-25
申请号：IT1998981
申请日：1981-02-25
Applicant: SONY CORP
Inventor： DOI TOSHITADA , ODAKA KENTAROU
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公开(公告)号：IT8025205D0
公开(公告)日：1980-10-08
申请号：IT2520580
申请日：1980-10-08
Applicant: SONY CORP
Inventor： TANAKA MASATO , FURUKAWA SHUNSUKE , IWAMOTO IKUO , DOI TOSHITADA
Abstract: A method and appratus are provided for communicating a sequence of digital information words. The information words are separated into a sequence of odd information words and a sequence of even information words. The separated odd and even information words are time-displaced from each other by a predetermined amount. The odd information words are encoded in an error-correcting code, and the even information words are separately encoded in a similar error-correcting code. The encoded time-displaced odd and even information words are combined into a transmission block, and this transmission block is transmitted or recorded. In one embodiment, the information words are encoded by generating an error-correcting word in response to the odd information words and by generating an error-correcting word in response to the even information words. The respective error-correcting words are interleaved with the odd and even information words. To recover the original information words, the transmission block is received and the odd and even information words are decoded so as to correct errors therein. The time displacement between the decoded off and even information words are removed. If an information word contains an uncorrected error therein, a correct information word is approximated therefor by interpolating adjacent decoded odd or even information words so as to approximate a correct even or odd information word, respectively. A corrected sequence of information words formed of the decoded and approximated information words is recovered.
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公开(公告)号：CA1074236A
公开(公告)日：1980-03-25
申请号：CA271064
申请日：1977-02-04
Applicant: SONY CORP
Inventor： DOI TOSHITADA , IGA AKIRA , HAMADA OSAMU , HUKUDA JYOJI , HAMADA YUICHIRO
Abstract: A speaker system having a fluid source, plural flow pipes connected to the fluid source, each of the plural flow pipes having an opening, the area of the opening corresponding to each order of bite of a PCM (Pulse Code Modulated) input signal, and a device for controlling a flow-condition of the fluid of each of said flow pipes by the PCM input signal, a summation of the outflow from each of the pipes composing an analog acoustic output signal in response to the PCM input signal.
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公开(公告)号：AU3163077A
公开(公告)日：1979-06-21
申请号：AU3163077
申请日：1977-12-15
Applicant: SONY CORP
Inventor： DOI TOSHITADA , KAZAMI SHIN-ICHI
IPC: H03M13/00 , G11B20/10 , G11B20/12 , G11B20/18 , H03M13/27 , H04L1/10 , G11B5/09 , H04N5/785 , H04L3/02
Abstract: Digital signals consisting of sets of simultaneous bits have an error-correcting signal encoded into them by adding an error-correcting bit to each set. The sets thus enlarged are referred to as digital words. The digital signals are then converted from simultaneous, or parallel, form to serial, or sequential, form and the digital words from a block of several digital signals at a time are interleaved in such a way that corresponding words from each of the digital signals in the same block are placed in immediate sequence. Prior to adding the error-correcting bits error-detecting bits can be added to the original bits in intersecting sets can that intersect the first-mentioned sets in row by column relationship, and parity bits can also be formed simultaneously with the formation of the error-correcting bits as extensions of the intersecting sets. In decoding the resulting signals, changes in the bits forming one word of each digital signal can be directly corrected, and additional errors can be detected and minimized by forming mean value signals of digital signals that immediately precede and follow the erroneous digital signal or by retaining the preceding digital signal until the succeeding signals return to correct or correctable form.
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