Patents by Inventor Willem M. J. Coene
Willem M. J. Coene has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7065161Abstract: Sample values of an input information signal are obtained at sampling instants. For each of a plurality of states at a sampling instant, an optimum path metric value is determined. For each of the plurality of states a best predecessor state at he directly preceding sampling instant is determined. A state at the sampling instant identifies a sequence of n subsequent bits, where n is larger than 3, and sequences of n subsequent bits having n?1 directly successive bits of the same binary value ar allocated to the same state. The best path is established from the state at the sampling instant having the lowest optimum path metric value, back in time towards a previous sampling instant via best predecessor states, established earlier for earlier sampling instants, to establish an optimum state at the previous sampling instant. Then at least one bit of the n bits of the sequence of bits corresponding to the established optimum state at the previous sampling instant is output.Type: GrantFiled: June 4, 2003Date of Patent: June 20, 2006Assignee: Koninklijke Philips Electronics N.V.Inventor: Willem M. J. Coene
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Patent number: 7058142Abstract: An apparatus for deriving amplitude values from an input information signal, which amplitude values can he used as reference levels for the states of a finite state machine, which are needed for the computation of the likelihood functional in a partial response maximum likelihood bit detection apparatus. The apparatus includes an input for receiving the input information signal, a conversion device that derives a digital signal from the input information signal, a detection device for repeatedly detecting a state from subsequent sequences of n subsequent bits in the digital signal, a sample value determining mechanism for deriving sample values from input information signal, a processing mechanism for processing the sample values belonging to sequences of n bits of the same state, an output mechanism for supplying the processed signal values for each possible state as the amplitude values that can be used in the partial response maximum likelihood bit detection apparatus.Type: GrantFiled: March 31, 2003Date of Patent: June 6, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Willem M.J. Coene, Renatus J. Van Der Vleuten
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Patent number: 6664905Abstract: 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 stream of databits of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) conceived to convert said n-bit source words into corresponding m-bit channel words (y1, y2, y3) in accordance with a conversion of the Jacoby type, where m and n are integers, with m>n. The device further comprises control means (10) for carrying out DC-control on said binary channel signal by introducing a freedom of choice in the source-to-channel conversion. Furthermore, a decoding device is disclosed for decoding the channel signal obtained by means of the encoding device.Type: GrantFiled: January 22, 2003Date of Patent: December 16, 2003Assignee: Koninklijke Philips Electronics N.V.Inventor: Willem M. J. Coene
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Publication number: 20030194027Abstract: A partial response maximum likelihood (PRML) bit detection apparatus is disclosed for deriving a bit sequence from an input information signal. The apparatus comprises input means for receiving the input information signal, sampling means for sampling the input information signal at sampling instants so as to obtain samples of the input information signal at said sampling instants, conversion means for converting an array of said samples into an array of bits of a first or a second binary value, detection means for repeatedly detecting a state for subsequent sequences of n subsequent bits of said array of bits, said subsequent sequences being obtained by shifting a time window of n subsequent bits each time over one bit in time, means for establishing the best path through the states, and deriving means for deriving a sequence of bits in accordance with the best path through said states.Type: ApplicationFiled: June 4, 2003Publication date: October 16, 2003Inventor: Willem M.J. Coene
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Publication number: 20030189993Abstract: An apparatus for deriving amplitude values from an input information signal is proposed, which amplitude values can be used as reference levels for the states of a finite state machine, which are needed for the computation of the likelihood functional in a partial response maximum likelihood bit detection apparatus.Type: ApplicationFiled: March 31, 2003Publication date: October 9, 2003Inventors: Willem M.J. Coene, Renatus J. Van Der Vleuten
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Patent number: 6587520Abstract: Apparatus for deriving from an input information signal (IIS) amplitude values usable as reference levels for finite state machine states. The apparatus includes: conversion apparatus for deriving a digital signal from the IIS; detection apparatus for repeatedly detecting a state from sequences of n subsequent bits in the digital signal; sample value apparatus for deriving sample values from the IIS, one sample value for each sequence of n bits; processing apparatus for processing the sample values belonging to sequences of n bits of the same state, and for carrying out this processing step for all states, to obtain a processed signal value for each state; output apparatus for supplying the processed signal values for each state as the amplitude values; and apparatus to use the amplitude values for the possible states, obtained from a first portion of the IIS, for detecting bits from a second portion of the IIS.Type: GrantFiled: September 20, 1999Date of Patent: July 1, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Willem M. J. Coene, Renatus J. Van Der Vleuten
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Patent number: 6580766Abstract: A partial response maximum likelihood (PRML) bit detection apparatus derives a bit sequence from an input information signal. The apparatus includes: input apparatus for receiving the input information signal; sampling apparatus for sampling the input information signal at sampling instants so as to obtain samples of the input information signal at the sampling instants; conversion apparatus for converting an array of the samples into an array of bits of a first or a second binary value, detection apparatus for repeatedly detecting a state for subsequent sequences of n subsequent bits of the array of bits, the subsequent sequences being obtained by shifting a time window of n subsequent bits each time over one bit in time; apparatus for establishing the best path through the states; and deriving apparatus for deriving a sequence of bits in accordance with the best path through the states.Type: GrantFiled: September 20, 1999Date of Patent: June 17, 2003Assignee: Koninklijke Philips Electronics N.V.Inventor: Willem M. J. Coene
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Patent number: 6535151Abstract: 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 stream of databits of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) conceived to convert said n-bit source words into corresponding m-bit channel words (y1, y2, y3) in accordance with a conversion of the Jacoby type, where m and n are integers, with m>n. The device further comprises control means (10) for carrying out DC-control on said binary channel signal by introducing a freedom of choice in the source-to-channel conversion. Furthermore, a decoding device is disclosed for decoding the channel signal obtained by means of the encoding device.Type: GrantFiled: March 20, 2002Date of Patent: March 18, 2003Assignee: Koninklijke Philips Electronics N.V.Inventor: Willem M.J. Coene
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Publication number: 20020175842Abstract: 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 stream of databits of the source signal is divided into n-bit source words (x1, X2), which device comprises converting means (CM) conceived to convert said n-bit source words into corresponding m-bit channel words (Y1, Y2, y3) in accordance with a conversion of the Jacoby type, where m and n are integers, with m>n. The device further comprises control means (10) for carrying out DC-control on said binary channel signal by introducing a freedom of choice in the source-to-channel conversion.Type: ApplicationFiled: March 20, 2002Publication date: November 28, 2002Applicant: U.S. Philips CorporationInventor: Willem M.J. Coene
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Patent number: 6418096Abstract: An apparatus for reading an optical data carrier (1) in accordance with the invention, comprises a transducer (5) for optically reading an optically readable pattern recorded in substantially parallel data tracks of the data carrier (1). The transducer (5) generates a read signal (S0(t)) which is an indication of the optically readable pattern. The apparatus further includes unit for realizing a relative movement of the transducer (5) with respect to the data carrier (1). The apparatus also has correction unit (16, 17, 18) for reducing tangential tilt (IT) and error, signal generating unit (20) for generating an error signal (SE(t) for the correction unit. The apparatus characterized in that the error signal generating unit (20) are adapted to derive the error signal (SE(t)) from a temporal asymmetry of the response of the read signal (S0(t)) to the optically readable pattern.Type: GrantFiled: August 10, 1999Date of Patent: July 9, 2002Assignee: Koninklijke Philips Electronics N.V.Inventors: Josephus A. H. M. Kahlman, Willem M. J. Coene
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Publication number: 20020075172Abstract: 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 stream of databits of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) conceived to convert said n-bit source words into corresponding m-bit channel words (y1, y2, y3) in accordance with a conversion of the Jacoby type, where m and n are integers, with m>n. The device further comprises control means (10) for carrying out DC-control on said binary channel signal by introducing a freedom of choice in the source-to-channel conversion.Type: ApplicationFiled: December 10, 2001Publication date: June 20, 2002Applicant: U.S. Philips CorporationInventor: Willem M.J. Coene
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Patent number: 6404355Abstract: An apparatus is disclosed for generating a runlength limited (RLL) digital information signal, the digital information signal having a minimum runlength of d′ and a maximum runlength of k′, d′ and k′ being integers larger than zero and where k′ is larger than d′. In accordance with the invention, the apparatus is adapted to generate the runlength limited digital information signal, such that a minimum runlength in the digital information signal occurs isolated from other minimum runlengths in the digital information signal.Type: GrantFiled: September 30, 1999Date of Patent: June 11, 2002Assignee: Koninklijke Philips Electronics N.V.Inventor: Willem M. J. Coene
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Patent number: 6356215Abstract: 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 (C), wherein the stream of databits of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) conceived to convert said n-bit source words into corresponding m-bit channel words (y1, y2, y3) in accordance with a conversion of the Jacoby type, where m and n are integers with m>n. The device further comprises control means (10) for carrying out DC-control on said binary channel signal by introducing a freedom of choice in the source-to-channel conversion. Furthermore, a decoding device is disclosed for decoding the channel signal obtained by means of the encoding device.Type: GrantFiled: December 14, 1999Date of Patent: March 12, 2002Assignee: U. S. Philips CorporationInventor: Willem M. J. Coene
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Patent number: 6232896Abstract: An encoding device encodes a stream of databits of a binary source signal into a stream of databits of a binary channel signal, wherein the stream of databits of the source signal is divided into n-bit source words, which device includes converting apparatus to convert the n-bit source words into corresponding m-bit channel words in accordance with a conversion of the parity preserve type, where m and n are integers, with m>n. The device further includes control apparatus for carrying out DC-control on the binary channel signal by introducing a freedom of choice in the source-to-channel conversion. A decoding device decodes the channel signal obtained from the encoding device.Type: GrantFiled: December 21, 1999Date of Patent: May 15, 2001Assignee: U.S. Philips CorporationInventors: Willem M. J. Coene, Josephus A. H. M. Kahlman
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Patent number: 5753913Abstract: A method of non-recursive reconstruction of images in a High Resolution Electron Microscope (HRTEM). In an HRTEM a series of, for example, 100 images of an object is formed with each time a different setting of the astigmatism of the imaging lens or lenses. By subjecting these images to a Fourier transformation and multiplying the transformed images by a known filter function, a reconstruction of the object electron wave function is obtained by summing of the images thus filtered and transformed; said object electron wave function no longer contains the linear information which is undesirable for the reconstruction and the non-linear information which is not negligibly small for large thicknesses of the object is no longer present either.Type: GrantFiled: October 3, 1996Date of Patent: May 19, 1998Assignee: U.S. Philips CorporationInventors: Willem M.J. Coene, Augustus J.E.M. Janssen
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Patent number: 5691770Abstract: The picture quality of an MPEG-coded video signal can be improved considerably by modifying selected coefficients after conventional quantization, for example by rendering them zero. The modification is such that the Lagrangian cost D+.lambda.R (D is distortion, R is bitrate) is minimal for a given value of a Lagrange multiplier .lambda.. A relatively simple process is disclosed in which the value of .lambda. is calculated by means of statistical analysis (6) of the picture to be coded. The statistical analysis comprises the estimation of the RD curve on the basis of the amplitude distribution of the coefficients. The searched .lambda. is the derivative of this curve at the desired bitrate.Type: GrantFiled: April 24, 1996Date of Patent: November 25, 1997Assignee: U.S. Philips CorporationInventors: Gerrit J. Keesman, Willem M. J. Coene, Eduard W. Salomons
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Patent number: 5654547Abstract: In a method for the iterative formation of an image of a specimen in a particle-optical apparatus a series of experimental images (the experimental series) is recorded with each time a different setting of an imaging parameter (for example, the focal distance), and a comparable series of images is calculated on the basis of the electron wave at the specimen (the estimation). The two series are compared and on the basis thereof an electron wave is calculated (the feedback) with which a new series of images is calculated which better approximates the experimental series. This iteration step is repeated until the correspondence between the experimental series and the calculated series is sufficient, after which the associated electron wave is considered to be the desired image of the specimen. A substantial gain as regards calculation time can be achieved during the estimation step as well as during the feedback step by executing the operation of the invention by means of FFTs.Type: GrantFiled: March 15, 1996Date of Patent: August 5, 1997Assignee: U.S. Philips CorporationInventors: Willem M. J. Coene, Augustus J. E. M. Janssen