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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8134897 | Current gain control system A current gain control system is described and comprises first and second gain blocks respectively associated with the first and second input channels, wherein first and second gain blocks transmit first and second gain signals in response to receiving first and sec... | 03/13/2012 |
| 8102739 | Optical disk playback apparatus and optical disk recording/playback apparatus Disclosed herein is an optical disk playback apparatus including: a signal playback device configured to read and decode information recorded to an optical disk through an optical pickup unit in order to reproduce the information; the signal playback device includin... | 01/24/2012 |
| 8054719 | Comparator and optical-disc recording/reproduction apparatus A comparator includes a variable-gain amplifier circuit configured to vary an amplitude of an input signal by changing a gain in accordance with a control signal, and a comparison section configured to compare a slice level interlocked with a signal level received f... | 11/08/2011 |
| 7442913 | Photocurrent amplifier circuit and optical pick-up device A photocurrent amplifier circuit is capable of selectively amplifying one or more of photocurrents which are respectively obtainable from plural receiving devices, and can be realized to have a small size. The photocurrent amplifier circuit includes: light receiving... | 10/28/2008 |
| 7414928 | Method for determining sub-beam add signal (SBAD) value A method for determining a sub-beam add signal (SBAD) value is provided. At first, a jth read SBAD value is obtained at the jth read status. Next, the jth write SBAD value is determined according to the (j−1)th write SBA... | 08/19/2008 |
| 7369476 | Device for reading from or writing to optical recording media having a control unit for a data slicer The present invention relates to a device for reading from and/or writing to optical recording media (1) having an optical scanner (2) for scanning the recording medium (1) by means of a light beam (3) and for generating scanning signals ... | 05/06/2008 |
| 7366071 | Data recording method and device, data recording medium, data reproduction method and device The present invention provides a DSV normal controller and a DSV special controller. In only a predetermined region designated on an optical disc, the DSV special control is performed. The DSV special control causes the absolute value of the DSV to increase so that ... | 04/29/2008 |
| 7342862 | Optical disc system and control method thereof An optical disc system includes a disc recording unit for recording an information signal on an optical disc by switching irradiation power of laser light to be applied to the optical disc in accordance with the information signal. The disc recording unit includes a... | 03/11/2008 |
| 7343103 | Apparatus and method for detecting beam power in optical drive An apparatus and method for detecting beam power generated by a plurality of light sources, using a single device. The apparatus includes a light-receiving unit that receives the beam power generated by one of a plurality of light sources, and an amplifying unit tha... | 03/11/2008 |
| 7315494 | Optical disk device and method for controlling slider An optical disk device includes a head including an actuator that supports and moves an objective lens at least in a direction of focusing, and a slider for transporting the head in the direction of tracking. In response to a static acceleration acting on the object... | 01/01/2008 |
| 7295499 | Wobble signal reproducing circuit The present invention has an object to stably reproduce wobble signals of all disks of CD-R/RW, DVD-R/RW and DVD-RAM by one wobble signal reproducing circuit. In the wobble signal reproducing circuit, an AGC (AUTOMATIC GAIN CONTROL) circuit for equating a push-pull ... | 11/13/2007 |
| 7289412 | Adaptive recording control method and apparatus for high density optical recording An adaptive recording control method and apparatus independently controlling the power levels of a first pulse, a multi-pulse, and a last pulse. The adaptive recording control method of an optical recording medium, according to which a mark is formed using a multipl... | 10/30/2007 |
| 7286447 | Recording and/or reproducing apparatus and method of controlling the same A recording and/or reproducing apparatus and a method of controlling the same. The method of controlling the apparatus for recording information in or reproducing information from a disc having a wobbled track, the method includes detecting a wobble signal recorded ... | 10/23/2007 |
| 7281175 | Readout controlling apparatus, reproducing apparatus, recording apparatus, and readout controlling method A readout controlling apparatus for controlling reading conditions at the time of reading data coded in units of predetermined code blocks from a recording medium capable of performing error correction at a high reliability even when the playback conditions are poor... | 10/09/2007 |
| 7266076 | Automatic detecting device for land pre-pits signals An automatic detecting device of land pre-pits signal is disclosed. The device adjusts gain of push-pull signals to raise the signal to noise ratio of the land pre-pits signal to the wobble signal. Digital logic computation is also utilized to recognize the practica... | 09/04/2007 |
| 7260231 | Multi-channel audio panel A method and apparatus for providing improved intelligibility of contemporaneously perceived audio signals. Differentiation cues are added to monaural audio signals to allow a listener to more effectively comprehend information contained in one or more of the signal... | 08/21/2007 |
| 7257058 | Offset adjusting circuit for optical disc and offset adjusting method An offset adjusting circuit for an optical disc comprises an offset-adjustment differential operational amplifier having an input terminal to which an output signal of an optical pickup is input and the other input terminal to which a control voltage is applied, an ... | 08/14/2007 |
| 7230401 | Apparatus and method for controlling an electric motor An apparatus for controlling an electric motor provided to drive a movable object such that a detected actual amount of motion of a movable portion of the electric motor or the movable object coincides with a target amount, comprising: ... | 06/12/2007 |
| 7230891 | Optical disk device recording data on a recordable or rewritable optical disk by setting a recording velocity and a recording power for each of zones on an optical disk An optical disk device record data on a recordable or rewritable optical disk. After a pause and a restart in the constant angular velocity (CAV) method occurs predetermined times due to a cause of a recording error such as a buffer underrun, the data-recording by t... | 06/12/2007 |
| 7224659 | Disk reproducing device with suppressed reproduction signal error An RF signal that is a disk reproduction signal is binarized through an equalizer and a slicer, followed by data demodulation, and an error rate of the reproduction signal is detected in an error detection circuit. If the error rate in the error detection circuit is... | 05/29/2007 |
| 7221627 | Optical device for reading information An optical playback or recording device is equipped with mass-unbalance detection means (20) for detecting unbalance on the record carrier (2). Mass-unbalance causes vibration and sound in the optical device when the record carrier (2) is rotate... | 05/22/2007 |
| 7219296 | Information reproducing apparatus and method with correction of equalized signal levels An information reproducing apparatus has an equalizing filter which performs partial response equalization of a detection signal detected by a detecting section and which outputs an equalized signal, a variable gain amplifier which corrects the potential of the equa... | 05/15/2007 |
| 7212482 | Apparatus and method to dynamically adjust the amplitude of a signal comprising information A method and apparatus to dynamically adjust the amplitude of a signal comprising information read from an information storage medium. The method first forms (N) digital signals comprising information read from an information storage medium. The method provides a fi... | 05/01/2007 |
| 7212640 | Variable attack and release system and method Variable attack and release system and method are disclosed for dynamically modifying the various elements of the system, including modifying compander response time to dynamically adjust for changing parameters such as environmental or input signal changes, to main... | 05/01/2007 |
| 7212486 | Optical disk device setting a gain of an amplifier so that a peak value and a bottom value of wobble signal components coincide In this optical disk device, a reflected light of a light beam reflected from a pre-pit-formed side of a track wobbled on a disk is detected as a first detection signal. A reflected light of the light beam reflected from the other side of the track is detected as a ... | 05/01/2007 |
| 7206152 | Adaptive equalizing circuit and regenerative device using it, and adaptive equalizing method An adaptive type equalization circuit and a playback apparatus can be used for the playback of a digital signal. A playback signal is supplied to an analog to digital converter and phase lock loop such that digital conversion of the playback signal is performed. Cha... | 04/17/2007 |
| 7203143 | Slew rate limiting circuit and optical disc apparatus In a slew rate limiter, a slew rate is limited so as not to pass a signal varying more abruptly than a wobble signal included in a difference signal generated by a differential amplifier, and this limited slew rate is used to process the difference signal to be outp... | 04/10/2007 |
| 7197001 | Apparatus for detecting a pre-pit signal An apparatus for detecting a pre-pit signal at different laser power intensities of an optical disk drive. The apparatus includes an amplifier for receiving a push-pull signal acquired from an optical disk to generate an adjusted signal, a multiplexer for receiving ... | 03/27/2007 |
| 7193949 | Method for recording data on optical recording medium, device for recording data on optical recording medium, and optical recording medium A method is provided for recording data in a write-once type optical recording medium which can record data by forming a recording mark having a desired length and reduce jitter of a reproduced signal. The method comprises determining a pulse train pattern so that a... | 03/20/2007 |
| 7190292 | Input level adjust system and method A method of matching input amplitudes in a system wherein one or more of a plurality of inputs may be selected, with each input capable of having different characteristics, involving selecting an input signal and mapping the input signal to a predetermined signal am... | 03/13/2007 |
| 7180838 | Optical pickup apparatus with single light source module An optical pickup apparatus includes a light source module which emits a light beam, a beam splitter which reflects or transmits the light beam emitted from the light source module, an objective lens which focuses the light beam passing through the beam splitter ont... | 02/20/2007 |
| 7161887 | Method and apparatus for extracting digital data from a medium A computer-implemented method and apparatus for extracting digital data from a medium. Digital audio extraction techniques are implemented with additional features that improve the quality of the resulting audio playback files. In one embodiment of the invention, a ... | 01/09/2007 |
| 7152009 | Parameter correction circuit and parameter correction method In a parameter correction circuit in an LSI, a reference resistor element with high precision having a resistance value set to a target value is connected to an external terminal of the LSI. A constant current from a mirror circuit connected to a current supply flow... | 12/19/2006 |
| 7151732 | Optical disk unit capable of reading out data normally and continuously after suspension of data writing An optical disk unit includes the following: a storage part temporarily storing data to be written to an optical disk; a processing part processing the data; an encoder part modulating and outputting the processed data; a writing control part controlling writing of ... | 12/19/2006 |
| 7106667 | Data recording device capable of restarting after an interruption When data recording is interrupted, a location at which data have been last recorded is accurately detected and a seamless restart of the recording is achieved even if reproducing errors occur due to scratches or the like on an optical disk. A pattern data that indi... | 09/12/2006 |
| 7106672 | Method and apparatus for using a frequency difference to adjust a target bit for bit counting A method and apparatus for normalized bit counting is described. The method comprising incrementing a bit counter using a first clock, and adjusting a target bit based on a difference in frequency between the first clock and a second clock. The method further compri... | 09/12/2006 |
| 7106823 | System and method for accelerated clock synchronization of remotely distributed electronic devices A timing recovery system and method for accelerated clock synchronization of remotely distributed electronic devices is provided. The system includes a phase locked loop, a linear estimator and control logic. The method includes sampling a clock signal received from... | 09/12/2006 |
| 7102974 | Optical head optical output setting method and optical disk recording apparatus To provide a method for optimizing the optical output from an optical head when recording data onto an optical disk, each time a suspension of data recording onto the disk is determined, the optical head reads data recorded onto the disk before the suspension, and r... | 09/05/2006 |
| 7099246 | Method and apparatus for recording data on an optical disc with restarting writing of data after data recording interruption A data recording equipment that accurately restarts the writing of data to an optical disc after data recording is interrupted. The equipment interrupts recording when detecting an external shock or when predicting the occurrence of a buffer underrun error. The equi... | 08/29/2006 |
| 7085477 | Television apparatus A ROM 51 stores a plurality of volume set values and a plurality of level change rates corresponding to each other and an IC 5 accepts a volume set value specified by a user when carrying out volume setting. Moreover, it is decided whether a reproducin... | 08/01/2006 |
