公开(公告)号：CZ296699A3

公开(公告)日：2000-02-16

申请号：CZ296699

申请日：1998-12-07

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  SONY CORP

Inventor： KAHLMAN JOSEPHUS ,  NAKAGAWA TOSHIYUKI ,  SHIMPUKU YOSHIHIDE ,  NARAHARA TATSUYA ,  NAKAMURA KOUSUKE

IPC: H03M5/14

公开(公告)号：CA2281936A1

公开(公告)日：1999-07-01

申请号：CA2281936

申请日：1998-12-07

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  SONY CORP

Inventor： NAKAMURA KOUSUKE ,  KAHLMAN JOSEPHUS A H M ,  NAKAGAWA TOSHIYUKI ,  NARAHARA TATSUYA ,  SHIMPUKU YOSHIHIDE

IPC: H03M7/14 ,  G11B20/14 ,  H03M5/14

Abstract: A device is disclosed for encoding a stream of databits of a binary source signal (S) into a stream of databits of a binary channel signal (C), wherein the bitstream of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) adapted to convert said source words into corresponding m-bit channel words (y1, y2, y3). The converting means (CM) are further adapted to convert n-bit source words into corresponding m-bit channel words, such that the conversion for each n-bit source word is parity preserving (table I) (Fig. 1). The relations hold that mn1, p1, and that p can vary. Preferably, m = n + 1. The device is adapted to convert the 8-bit bitsequence '00010001' in the source signal into the 12-bit bitsequence '100010010010' and to convert the 8-bit bitsequence '10010001' into the 12-bit bitsequence '000010010010', in order to limit the repeated minimum transition runlength in the channel signal. Also other 8-bit sequences require a specific encoding into 12-bit bitsequences in order to limit the kconstraint of the channel signal to 7. Further, a decoding device is disclosed for decoding the channel signal obtained by means of the encoding device.

公开(公告)号：AT170019T

公开(公告)日：1998-09-15

申请号：AT93108290

申请日：1993-05-21

Applicant: SONY CORP

Inventor： SHIMPUKU YOSHIHIDE ,  INO HIROYUKI ,  CHAKI YASUYUKI ,  NAKAGAWA TOSHIYUKI

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B20/14

Abstract: A method of modulating digital data to a variable-length code (d, k; m, n; r) for recording information on and reproducing the same from an optical disc (21). The optimal range of a minimum run length d corresponding to the minimum number of successive same symbols is determined by a procedure which comprises a first step (52, 53) to determine the minimum S/N required for obtaining a desired error rate from the relationship between a bit error rate and the S/N when d = 0; a second step (54) to obtain the relationship between a change of the numerical value d and that of the S/N by calculating, on the basis of the required minimum S/N obtained at the first step (52, 53), the S/N loss caused due to the change of the numerical value d; and a third step (55) to determine, from the relationship between the numerical value d and the S/N, the range of the value d corresponding to the S/N of the transmission characteristic dependent on an optical system and an optical disc (21).

公开(公告)号：PL315845A1

公开(公告)日：1996-12-09

申请号：PL31584595

申请日：1995-12-12

Applicant: SONY CORP

Inventor： SHIMPUKU YOSHIHIDE ,  NAKAGAWA TOSHIYUKI

IPC: G06T9/00 ,  G11B20/14 ,  H03M5/14 ,  H03M7/14

公开(公告)号：NO332391B1

公开(公告)日：2012-09-10

申请号：NO20000392

申请日：2000-01-26

Applicant: SONY CORP ,  KONINKL PHILIPS ELECTRONICS NV

Inventor： SCHOUHAMER IMMINK KORNELIS A ,  KAHLMAN JOSEPHUS A H M ,  NAKAGAWA TOSHIYUKI ,  SHIMPUKU YOSHIHIDE ,  NAKAMURA KOSUKE ,  NARAHARA TATSUYA ,  ENDEN GIJSBERT JOSEPH VAN DEN

IPC: H03M7/14 ,  G06F7/00 ,  G11B20060101 ,  G11B5/60 ,  G11B20/14 ,  G11B21/21 ,  H03M20060101 ,  H03M5/14 ,  H03M7/00 ,  H03M7/02 ,  H03M7/40 ,  H04L27/00 ,  H04L27/04

Abstract: A DSV control bit determining/inserting unit 11 inserts DSV control bits for execution of DSV control into an input data string and outputs the data string including the DSV control bits to a modulation unit 12. The modulation unit 12 converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit 13. The conversion table used by the modulation unit 12 includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit. In addition, the conversion table enforces a conversion rule, according to which the remainder of division of the "1" count of an element in a data string by 2 having a value of 0 or 1 shall always be equal to the remainder of division of the "1" count of an element in the code resulting from conversion of the data string by 2.

公开(公告)号：DE69825551T2

公开(公告)日：2005-07-28

申请号：DE69825551

申请日：1998-12-09

Applicant: SONY CORP

Inventor： NAKAGAWA TOSHIYUKI ,  SHIMPUKU YOSHIHIDE

IPC: G06F7/00 ,  G06F1/02 ,  G06F7/76 ,  G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H03M7/46

Abstract: A DSV bit is inserted in an input data string by a DSV bit determining insertion unit (11). A modulation unit (12) has a conversion table, and the element of the conversion table comprises the element for determining uniquely, and has a conversion rule that residues obtained by dividing the number of "1" in the element of a data string and the number of "1" in the element of a code word string to be converted by 2 are identically 1 or 0 for both residues. A channel bit string is modulated according to the conversion table, and further NRZI modulated by an NRZI modulation unit (13). Thus, DSV control can be performed with reduced redundancy.

公开(公告)号：DE69825551D1

公开(公告)日：2004-09-16

申请号：DE69825551

申请日：1998-12-09

Applicant: SONY CORP

Inventor： NAKAGAWA TOSHIYUKI ,  SHIMPUKU YOSHIHIDE

IPC: G06F7/00 ,  G06F1/02 ,  G06F7/76 ,  G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H03M7/46

Abstract: A DSV bit is inserted in an input data string by a DSV bit determining insertion unit (11). A modulation unit (12) has a conversion table, and the element of the conversion table comprises the element for determining uniquely, and has a conversion rule that residues obtained by dividing the number of "1" in the element of a data string and the number of "1" in the element of a code word string to be converted by 2 are identically 1 or 0 for both residues. A channel bit string is modulated according to the conversion table, and further NRZI modulated by an NRZI modulation unit (13). Thus, DSV control can be performed with reduced redundancy.

公开(公告)号：ZA9811732B

公开(公告)日：2000-09-27

申请号：ZA9811732

申请日：1998-12-21

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  SONY CORP

Inventor： KAHLMAN JOSEPHUS A H M ,  NAKAGAWA TOSHIYUKI ,  SHIMPUKU YOSHIHIDE ,  NARAHARA TATSUYA ,  NAKAMURA KOUSUKE

IPC: G06K20060101 ,  G11B20060101 ,  G11C20060101 ,  H03K20060101 ,  H03M20060101 ,  H03M ,  G06K ,  G11B ,  G11C ,  H03K

公开(公告)号：TR9902381T1

公开(公告)日：2000-07-21

申请号：TR9902381

申请日：1998-12-07

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  SONY CORP

Inventor： KAHLMAN JOSEPHUS ,  NAKAGAWA TOSHIYUKI ,  SHIMPUKU YOSHIHIDE ,  NARAHARA TATSUYA ,  NAKAMURA KOUSUKE

IPC: H03M7/14 ,  G11B20/14 ,  H03M5/14

CPC classification number: G11B20/1426 ,  H03M5/145

公开(公告)号：DE69327740T2

公开(公告)日：2000-06-08

申请号：DE69327740

申请日：1993-03-10

Applicant: SONY CORP

Inventor： INO HIROYUKI ,  SHIMPUKU YOSHIHIDE ,  CHAKI YASUYUKI ,  NAKAGAWA TOSHIYUKI

IPC: G11B20/14 ,  H03M5/14 ,  H03M7/40

Abstract: A modulating method and apparatus and a demodulating method and apparatus in which a variable length code (d, k;m, n;r) which can provide a greater minimum reversal distance to allow recording of a higher density than ever is provided. According to the modulating method and apparatus, digital data of a basic data length of m bits is modulated into a variable length code (d, k;m, n;r) of a basic code length of n bits, and where the distance between adjacent ones of the digital data is represented by T, the minimum reversal distance (Tmin) of the variable length code is equal to or greater than 2.0T and the minimum length of a run of a same symbol is equal to or greater than 4. The demodulating apparatus demodulates the digital data back into the variable length code and comprises storage means (23) for storing therein a plurality of tables for converting the digital data into the variable length code, discriminating means (21) for discriminating the binding length of the digital data, and selecting means (22) for selecting one of the tables in accordance with a result of discrimination of the discriminating means(21).