Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7907484 | Reproducing apparatus and reproduction method A reproducing apparatus includes the following elements. A reproducing head unit irradiates an optical disk with a laser beam to obtain a reproduced signal. An offset cancellation circuit cancels an offset element of the reproduced signal. An automatic gain control ... | 03/15/2011 |
| 7701818 | Optical disk apparatus with controller for changing an amount of lifting and a control method thereof In an optical disk apparatus, for reproducing information recorded on a recording surface of an optical disk, by setting such a focus condition that a tracking servo-error level comes to be maximum with a reflection light from the recording surface, while irradiatin... | 04/20/2010 |
| 7433289 | Frequency detection method for optical disc bit data reproduction apparatus The present invention relates to a frequency detection method for an optical disc bit data reproduction apparatus. The frequency detection method uses the optical disc bit data reproduction apparatus including an Analog to Digital Converter (ADC), an interpolator, a... | 10/07/2008 |
| 7394744 | Reproduction apparatus and information recording medium testing apparatus A reproduction apparatus is capable of reproducing information recorded on information recording media including at least a super RENS recording medium. The reproduction apparatus includes: an optical head that receives laser light that has been reflected or transmi... | 07/01/2008 |
| 7369185 | Broadcast receiving apparatus and method having volume control A receiving apparatus includes a receiving unit configured to receive a signal including a program, an acquiring unit configured to acquire information representing a category of the program received by the receiving unit, a volume data generating unit configured to... | 05/06/2008 |
| 7349305 | Wobble signal reproducing device and method A wobble signal reproducing device and method. The wobble signal reproducing device may include a computation unit for outputting a push-pull signal by use of a signal picked up by wobbling an optical disc; a wobble band pass filter (BPF) unit for applying band pass... | 03/25/2008 |
| 7337394 | Digital content production system and digital content production program The invention provides a digital content production system which is appropriate for use in preventing a layout intended by a designer from being destroyed and provides freedom in the order of posting information. A content delivery terminal processes a flow object u... | 02/26/2008 |
| 7327183 | Squaring cells and multipliers using summed exponentials A squaring cell combines first and second exponential currents to approximate square law behavior. The exponential currents can be generated by current stacks having pairs of series-connected junctions. The exponential currents can be altered to change the shape of ... | 02/05/2008 |
| 7324903 | Method and apparatus for measuring signal quality using eye pattern A signal quality measuring method and apparatus in which a quality of a signal detected from an RF signal read out from a disk or a communications channel is measured by using eye pattern signals of the detected RF signals. Eye pattern signals representing time chan... | 01/29/2008 |
| 7310291 | Method and apparatus for tracking error detection in optical disk driver A method and apparatus for tracking error detection in an optical disk reproduction system. The tracking error detecting apparatus generates a tracking error signal as a difference signal of optical detection signals generated by more than two optical detectors posi... | 12/18/2007 |
| 7310292 | Optical disk reproducing device that demodulates digital data by switching between a channel bit frequency and a frequency that is half of the channel bit frequency A data demodulation process rate is varied according to a reproduction state, thereby reducing power consumption while maintaining a reading performance in a favorable state. A channel rate process data demodulation device performs a data demodulation process by emp... | 12/18/2007 |
| 7310508 | Inline filter resistors A shorted resistive block formed in line with at least one trace of a plurality of a top metal layer includes a plurality of resistors with a removable shorting link coupled across the resistive block. The resistive block comprises one of a plurality of series coupl... | 12/18/2007 |
| 7274759 | Antenna switching based on a preamble MSE metric An apparatus and method for improving the signal reception of a digital wireless receiver comprises a processing circuit for processing the preamble information of incoming signals, wherein a first predetermined portion of the preamble information is applied to a fi... | 09/25/2007 |
| 7274645 | Reproduction signal processing apparatus and optical disc player including the same A reproduction signal processing apparatus includes: a reproduction unit, an A/D converter for sampling a reproduction signal to obtain a multi-bit digital signal, a phase-locked loop controller for outputting a reproduction clock that is in phase with clock compone... | 09/25/2007 |
| 7230782 | Correlation receiver for demodulating servo track information A correlation receiver, among other functions, detects peaks of a correlation signal. The correlation receiver includes a master peak detector for determining whether an amplitude of a pulse of the correlation signal exceeds by at least a first delta an amplitude of... | 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 |
| 7218686 | Decision threshold voltage control circuit and decision threshold voltage controlling method of clock and data recovery circuit, optical receiver, and decision threshold voltage control program According to a decision threshold voltage controlling method of feeding an optimum decision threshold voltage to a clock and data recovery circuit which converts an optical input signal into an electric signal, extracts a clock component from an input data signal am... | 05/15/2007 |
| 7215613 | Optical disk apparatus Without waiting for the rotational speed of an optical disk reaches a rotational speed (Vb) for a reproduction process, a cutoff frequency (Fca) of an RF signal and a boost amount (Bt) for an equalizer circuit are detected, and, with using the rotational speed (Va) ... | 05/08/2007 |
| 7203325 | Audio processing device An audio processing device for processing an audio input signal comprises one or more noise reducing means, noise level measuring means and control means connected to the noise level measuring means for controlling the noise reducing means. The audio processing devi... | 04/10/2007 |
| 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 |
| 7171010 | Dynamic bass boost apparatus and method Audio processing methods and apparatus are provided for at least partially compensating for the Fletcher-Munson effect. An audio processor includes a variable filter receiving an input signal and providing a filtered output signal, the variable filter having a fixed... | 01/30/2007 |
| 7154424 | Digital equalization apparatus A digital equalization apparatus is provided with an analog low pass filter for removing a high-frequency component from an input analog signal, a non-linear analog to digital (A/D) converter for non-linearly sampling the analog signal to output a digital signal, an... | 12/26/2006 |
| 7136340 | Semiconductor integrated circuit and medium record playback device A disk type record playback device having a wobble signal extracting bandpass filter for controlling a filter's center frequency according to a frequency follow-up control loop including a dummy filter identical in configuration to a filter to be controlled, and a p... | 11/14/2006 |
| 7133335 | 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 ... | 11/07/2006 |
| 7130253 | Disk DVD-ROM drive unit with a playback speed control and disk drive method A disk drive unit for reproducing information recorded on a digital versatile disk (DVD). The disk drive unit has a copyright management information reading unit for reading copyright management information from a predetermined location on a DVD loaded into the disk... | 10/31/2006 |
| 7123572 | Method for reducing the noise in a wobble signal The present invention relates to a method and a circuit for recovering information contained in a wobbled track on an optical storage medium. One aim of the invention is to describe a method within an appliance for reading from and/or writing to optical storage medi... | 10/17/2006 |
| 7123846 | Optical receiving device, waveform optimization method for optical data signals, and waveform optimization program for optical data signals This optical receiving device for discriminating and recovering a data signal, which results from converting an optical signal input through a dispersion equalizer into an electrical signal and amplifying it to a pre-determined amplitude, by using a clock and data r... | 10/17/2006 |
| 7102967 | Method and apparatus for tracking error detection in optical disk driver A method and apparatus for tracking error detection in an optical disk reproduction system. The tracking error detecting apparatus generates a tracking error signal as a difference signal of optical detection signals generated by more than two optical detectors posi... | 09/05/2006 |
| 7102978 | Multi-format optical disk device and optical disk recording and/or reproducing method The present invention is applied to an optical disk apparatus which records data on and/or plays back data from one of a variety of DVD optical disks. The present invention generates a binarization threshold S3 by offsetting an envelope S2 of a playbac... | 09/05/2006 |
| 7085297 | Driving method and driving circuit of light source apparatus A driving method of a semiconductor laser having an active layer region, a phase adjustment region and a distributed Bragg reflector region includes the steps of: calculating an average value of multipulse modulation currents modulated between a peak current and a b... | 08/01/2006 |
| 7082082 | Apparatus for recording and playing back information from an optical disk having PEP and BCA blocks An optical disk, a recording apparatus and playing apparatus which can record various kinds of identification information in the form of a pit train and a bar code without decreasing the data recording area for main information. Both a first data block including a p... | 07/25/2006 |
| 7075869 | Method and apparatus for determining applicable recording speed of a recordable optical disk Information indicative of disk-applicable recording speeds is incorporated in lead-out start time information within ATIP information that is recorded in pre-grooves located in a lead-in area of an optical disk. Once the optical disk is inserted in an optical disk r... | 07/11/2006 |
| 7050371 | Cross-talk removal apparatus and data reproduction apparatus A pick up irradiates light beams at specified intervals in the tangential direction of the main track to be reproduced and both of adjacent tracks on a disk 10 on which tracks are formed. A CTC unit 15 uses the delay amount Δd of the respective sample... | 05/23/2006 |
| 7027374 | Optical disk having wobble patterns representing control information On an optical disk medium according to the present invention, address information is recorded along a wobbling track groove 2. The track groove 2 is made up of a plurality of unit sections 22, 23. Each of these unit sections 22, 23 has si... | 04/11/2006 |
| 7023782 | Dropout detection circuit and optical disc apparatus The dropout detection circuit of the invention includes: a high-speed envelope detection circuit for detecting an envelope of a reflection signal of a light beam with a first time constant; a low-speed envelope detection circuit for detecting an envelope of the refl... | 04/04/2006 |
| 7020054 | Digital servo system with biased feed-forward A digital servo system with a biased feed-forward control is disclosed. The biased feed-forward control determines the low frequency component of a control signal from the digital servo system. The low frequency component can then be added to a future control signal... | 03/28/2006 |
| 7016509 | System and method for varying low audio frequencies inversely with audio signal level The present invention relates to an auto loudness circuit for performing loudness compensation automatically depending on the signal level. When the signal level decreases, loudness compensation is slowly introduced and as the signal level increases, loudness compen... | 03/21/2006 |
| 7013013 | Surround device There is provided a surround device which processes stereo signals decoded by a decoder of a multi-channel surround method comprises boost means which boosts middle and low frequency components of a center channel signal in the stereo signals. There is also provided... | 03/14/2006 |
| 7006415 | Sampling clock generator for BCA data decoding A sampling clock generator for BCA data decoding providing a sampling clock, which is proportional to the actual rotation speed of a disk. The sampling clock generator includes a frequency counter, a divider and a frequency divider. The frequency counter counts the ... | 02/28/2006 |
| 6992964 | Information reproducing device and information reproducing method There is provided an information reproducing device which outputs an equalization signal P by applying equalization processing to a signal detected from a storage medium based on equalization coefficients C0 to CN, outputs a decoding signal d b... | 01/31/2006 |
