Abstract: Computer-aided processing of data from a number of data sources is provided. The data is analyzed with respect to a plurality of data quality types based on respective analysis methods for each data quality type, resulting in a quality value for each data quality type. The quality values for the respective data quality types are visualized on a graphical user interface.

Abstract: The present invention relates to a method for analyzing abnormal regions on an optical recording medium. The method includes the steps of: detecting the abnormal region; determining the type of the abnormal region; and measuring the length of the abnormal region. Before playback or recording of an optical recording medium inserted in an apparatus for reading from and/or writing to optical recording media the apparatus determines the positions, lengths and types of abnormal regions on the optical recording medium. The obtained information can then be used, for example, to avoid that during playback or recording a pickup for reading and/or recording unexpectedly encounters an abnormal region. This makes the operation of the apparatus more reliable.

Abstract: The invention proposes an appliance for recording or playing back information having means for detecting or moving the position of a scanning device over a disc with a wobble track, said appliance being able to be used both in recorded and in unrecorded areas of the disc and hence being able to be used both for write-once and for rewriteable recording media with a wobble track, and said appliance additionally permitting fast determination of the scanning location without decoding of scanned-location information which is contained in the wobble track. According to the invention, a wobble signal is scanned from the wobble track on the disc using a scanning device, and a wobble frequency contained in the wobble signal detected from the disc is used for detecting or moving the position of the scanning device.

Abstract: The present invention relates to a method for analyzing abnormal regions on an optical recording medium. The method includes the steps of: detecting the abnormal region; determining the type of the abnormal region; and measuring the length of the abnormal region. Before playback or recording of an optical recording medium inserted in an apparatus for reading from and/or writing to optical recording media the apparatus determines the positions, lengths and types of abnormal regions on the optical recording medium. The obtained information can then be used, for example, to avoid that during playback or recording a pickup for reading and/or recording unexpectedly encounters an abnormal region. This makes the operation of the apparatus more reliable.

Abstract: The invention proposes an appliance for recording or playing back information having means for signal generation from a wobble signal which is scanned from the undulating track on a recording medium, such as a DVD+RW. According to the invention, a signal scanned from the undulating recording track on the recording medium is supplied to a circuit arrangement for generating a clock signal which is both a square-wave voltage whose phase is synchronous with that of the signal and a signal with an even-numbered multiple of the frequency of the wobble signal contained in the signal. In this regard, the invention provides a phase locked loop which is synchronized with the signal and contains a frequency divider for actuating a digital phase shifter and for providing a clock signal which is a phase-synchronous square-wave voltage having the frequency of the wobble signal. The phase comparator provided is a multiplier which is formed using a changeover switch to which the signal and the inverted signal are applied.

Abstract: A data player or a method in which a reading and/or writing head is positioned according to anyone of 3 methods or combinations thereof: Calculating a desirable speed curve to position the head from a first to a second position and adjust the speed of the head's movement to the desirable speed, calculating and outputting an amount of energy to a driving mechanism to move the head a determined number of steps, increasing the power applied to a driving mechanism until the head is moved for one step. The positioning may additionally be used to perform coarse positioning while the head is positioned on a track of a data medium using a fine positioning mechanism.

Abstract: The present invention relates to a method and a circuit for write pulse generation for recording on optical media, and to an apparatus for writing to optical recording media using such method. It is an object of the invention to propose a reliable and accurate method for write pulse generation with low hardware complexity. According to the invention, this object is achieved by a method for write pulse generation on the basis of a bit clock, including the steps of: dividing the bit clock by a factor n, multiplying the divided bit clock by a factor n+x or n?x with a phase-locked loop to obtain signal edges which are time-shifted relative to the bit clock, selecting a desired time-shifted signal edge, and multiplying the selected time-shifted signal edge by the factor n with a further phase-locked loop to obtain a time-shifted bit clock.

Abstract: A disc speed control device for use in a disc player and/or recorder having a pick-up for reading/recording data. The device comprises an inner loop which regulates a determined disc rotation speed value received at its input and an outer loop which delivers this speed value depending on a frequency at which data is read by the pick-up. The present invention is particularly useful in multistandard disc drives which need to adjust to different disc speed modes, for example, constant angular velocity, or constant linear velocity.

Abstract: A data player or a method in which a reading and/or writing head is positioned according to anyone of 3 methods or combinations thereof: Calculating a desirable speed curve to position the head from a first to a second position and adjust the speed of the head's movement to the desirable speed, calculating and outputting an amount of energy to a driving mechanism to move the head a determined number of steps, increasing the power applied to a driving mechanism until the head is moved for one step. The positioning may additionally be used to perform coarse positioning while the head is positioned on a track of a data medium using a fine positioning mechanism.

Abstract: The invention proposes an appliance for recording or playing back information having means for detecting or moving the position of a scanning device over a disc with a wobble track, said appliance being able to be used both in recorded and in unrecorded areas of the disc and hence being able to be used both for write-once and for rewriteable recording media with a wobble track, and said appliance additionally permitting fast determination of the scanning location without decoding of scanned-location information which is contained in the wobble track. According to the invention, a wobble signal is scanned from the wobble track on the disc using a scanning device, and a wobble frequency contained in the wobble signal detected from the disc is used for detecting or moving the position of the scanning device.

Abstract: a data player or a method in which a reading and/or writing head is positioned according to anyone of 3 methods or combinations thereof: Calculating a desirable speed curve to position the head from a first to a second position and adjust the speed of the head's movement to the desirable speed, calculating and outputting an amount of energy to a driving mechanism to move the head a determined number of steps, increasing the power applied to a driving mechanism until the head is moved for one step. The positioning may additionally be used to perform coarse positioning while the head is positioned on a track of a data medium using a fine positioning mechanism.

Abstract: The invention proposes an appliance for recording or playing back information having means for signal generation from a wobble signal which is scanned from the undulating track on a recording medium, such as a DVD+RW. According to the invention, a signal scanned from the undulating recording track on the recording medium is supplied to a circuit arrangement for generating a clock signal which is both a square-wave voltage whose phase is synchronous with that of the signal and a signal with an even-numbered multiple of the frequency of the wobble signal contained in the signal. In this regard, the invention provides a phase locked loop which is synchronized with the signal and contains a frequency divider for actuating a digital phase shifter and for providing a clock signal which is a phase-synchronous square-wave voltage having the frequency of the wobble signal.

Abstract: A sailcloth is constructed by laminating two layers of cloth together with a central layer of film. The cloth layers are oriented such that stretch resistant yarns in the layers run perpendicular to each other.

Abstract: The present invention relates to a device for reading from or writing to recording media in disc form which has an unbalance compensation means.

Abstract: A device and a method are disclosed for obtaining a corrected servo control signal in a servo control loop take in account a dynamic behavior of the servo control signal to calculate a new threshold for this signal. If the servo control signal for any reason goes beyond the extremum then it is corrected by replacing it with the value of the threshold. Depending on the difference between the servo control signal and the threshold the new threshold may be greater or smaller than the previous threshold value. The threshold may be a maximum or a minimum thus limiting the servo control in its maximum or in its minimum value.

Abstract: The present invention relates to a device for reading from or writing to recording media in disc form which has an unbalance compensation means. The object of the invention is to propose a device of this type which has the smallest possible unbalance even when exchangeable recording media are used. This object is achieved according to the invention by virtue of the fact that the unbalance compensation means is a centrifugal force generation means which generates a centrifugal force which is variable during operation. According to another aspect of the present invention, provision is made for the unbalance compensation means to be a positioning means for positioning the recording medium. The field of application of the invention includes, inter alia, devices for reading from and/or writing to optical recording media such as CD, CD-ROM, DVD, DVD-ROM, DVD-RAM and the like.

Abstract: A method for tracking control of a head unit with respect to data tracks on a magnetic tape determines a first tracking signal and a second tracking signal from control tracks recorded on the tape. The data tracks are divided into successive data sections, each of which is subdivided into an initial region and a useful region. A first control track extends over the entire length of the data section. In addition to this, a second control track is provided in the initial region of each data section. A first tracking signal is generated from the first control track and a second tracking signal is generated from the first and second control track. A difference signal is generated and stored, which is based on a comparison of the first and second tracking signal. A tracking control signal applied to an actuator adjusting the head unit is generated from the second tracking signal when the second tracking signal is available.

Abstract: A method for controlling a phase relation between a head drum and a tape feed system, of a type wherein digital picture data is subdivided into blocks having an assigned pointer value each and wherein the pointer values define which part of the picture the block of picture data represents includes the steps of: incrementing or decrementing a location in a measured value with a corresponding pointer value with corresponding data block in a reproduced data stream, monitoring the content of the locations in the measured value store after a certain amount of reproducing time by means of determining the distance between pointer value regions which have been reproduced more often than the regions in-between, thereby taking into account the difference in reproducing frequency between the more often reproduced regions and the more seldom reproduced regions according to the measured value store entries, and determining a phase correction value for the control of the phase relation between the head drum and the tape fe

Abstract: A triangular sail is made by laminating three triangular layers of reinforced film together on a mold to provide a one piece molded sail. Each layer is made up of a plurality of triangular pieces which radiate out of one of the three corners of the sail, such that the pieces in each layer cross in the body of the sail.

Abstract: A method for tracking control of a head unit with respect to data tracks on a magnetic tape determines a first tracking signal and a second tracking signal from control tracks recorded on the tape. The data tracks are divided into successive data sections, each of which is subdivided into an initial region and a useful region. A first control track extends over the entire length of the data section. In addition to this, a second control track is provided in the initial region of each data section. A first tracking signal is generated from the first control track and a second tracking signal is generated from the first and second control track. A difference signal is generated and stored, which is based on a comparison of the first and second tracking signal. A tracking control signal applied to an actuator adjusting the head unit is generated from the second tracking signal when the second tracking signal is available.