Abstract: An information processing device includes: a detection unit that detects that an application enabling a call with another information processing device over a network occupies a microphone or a speaker; and a recording unit that starts recording of audio data output to the speaker and audio data input from the microphone in the case where the application detects that the microphone or the speaker is occupied.

Abstract: An ultrafast mode-locked laser comprising circuitry configured to drive an electro-optic modulator (EOM) in the mode-locked laser with a drive waveform, the drive waveform being a phase-coherent sinusoidal waveform at a frequency equal to a repetition rate of the mode-locked laser, a phase-coherent pulsed waveform at a frequency equal to the repetition rate of the mode-locked laser, or a phase-coherent sinusoidal waveform at a frequency equal to half of the repetition rate of the mode-locked laser.

Abstract: Circuits, architectures, systems, methods, software, and algorithms for detecting a modulation transition (e.g., a change from a written portion containing RF-modulated data to an unwritten portion containing only a wobble signal modulation) on an optical storage medium. The method generally includes steps of focusing a first spot of light onto an optical storage medium, wherein the first spot is substantially centered on a first track of the optical storage medium, focusing a satellite spot of light onto an optical storage medium, wherein the satellite spot at least partially overlaps a track adjacent to the first track, generating a satellite signal from light reflected from the optical storage medium from the satellite spot, and detecting the modulation transition by detecting a change in a level of the satellite signal.

Abstract: A device process for event-activated recording generally includes the steps of providing an acquisition buffer having at least one finite extent of a recording medium. Events are recorded in the acquisition buffer. Current events in place of earlier events are then recorded within the acquisition buffer. Action by the user or triggering system activates the preservation of all or part of the record of the most recent events recorded in the acquisition buffer upon the detection of one or more predetermined events. A portion of the record of events selected by the user is preserved by reserving a portion of the record of events from being overwritten by other events, and/or by transferring the selected portions of the record of events to a predetermined permanent location. Portable devices and applications to the recording telephone conversations are also disclosed.

Abstract: A method for illuminating a liquid crystal display device, a back-light assembly for performing the same and a liquid crystal display device using the same can improve the front luminance and production yield. Lights from a lamp is incident to a LCD panel side, which are then primarily diffused for a uniformity of the luminous flux of the incident lights. The luminous flux of the primarily diffused lights is condensed with respect to a first orientation component on a plane in parallel with the LCD panel, and then partially and secondarily diffused for extending a view angle of pixels of the LCD panel. After the luminous flux of the secondarily diffused lights is condensed with respect to a second orientation component perpendicular to the first orientation on the parallel plane, the condensed lights are illuminated onto the LCD panel.

Abstract: The invention relates to a process for selectively recording or recalling events, and a device therefor.

Abstract: A recording method and apparatus enabling a user to select for recall and preservation portions of audio, video or other data that have been continuously recorded on a finite extent of recording medium, thereby enabling the effective recording and reproduction of events that transpired before the decision to record or reproduce them was made.

Abstract: A modulated single channel (as opposed to a quadrature channel) digital radio frequency memory (DRFM) system retrievably stores incoming radio frequency (RF) signals in a digital memory and replicates the RF signals at the output. The input RF signal to be stored is mixed with a local oscillator (LO) signal modulated with a waveform pattern to produce an intermediate frequency (IF) signal which is digitized and retrievably stored in the digital memory. The stored digital values are later retrieved from memory after the programmed delay time, and converted back to an analog IF signal and mixed with the local oscillator to produce the output RF signal. The LO signal is modulated with the same waveform used to produce the input IF signal. A controller for controlling the modulation of the LO signal and the memory includes a ROM for storing a pseudo random string of one bit words and an address counter to drive the ROM beginning at a starting address upon the occurrence of the input RF signal.

Abstract: A transparent record disc is provided which may appropriately have video signals optically recorded thereon, the record is composed of a lamination, for example, of pliant transparent plastic on a base of hard transparent plastic. The base provides strength for the record and the pliant plastic permits the video recording to be impressed into the record by simple embossing means, rather than by stamping or molding by which the surface of the record is actually raised above its melting point and caused to flow. An improved process for forming the video recordings on the disc record is also provided.

Abstract: The present invention describes a resynthesized DRFM and method thereof. A conventional DRFM is utilized with the addition of a computer device. Once the digital pattern signals are stored they are utilized to generate a digital pattern which fills the interpulse period between the pair of signals. The interpulse digital pattern is then adjusted so that the digital pattern phases of the first and second signals match. In general the interpulse period digital pattern is not a uniform replication of the pulsed signal digital pattern because the adjustments have been made in order to accomplish pattern phase between the two pulses. These are then stored in memory until recalled.

Abstract: In a circuit arrangement for a disk player of the type arranged to reproduce information prerecorded in the form of pits, a variable gain circuit for changing the frequency characteristic of the reproduced signal is provided. The level of the reproduced signal is detected at high and low frequencies so as to produce a control signal the voltage of which varies in accordance with the difference between the level of the high frequency signal component and the level of the low frequency component. The control signal is then applied to the variable gain circuit receiving the reproduced signal so that the frequency characteristic of the reproduced signal will be controlled. Thus, the level of the reproduced signal is boosted at its high frequency range.

Abstract: A signal substitution system is employed in audio processing circuitry to compensate for impulse noise and signal dropouts. Stored or delayed audio signal is substituted in the IF portion of the receiver circuitry ahead of the IF filters thereby precluding the noise impulses from exciting the filters into a ringing mode and significantly broadening what are otherwise very narrow signal disturbances. To insure that the substitution signal is in relative phase coherence with the substituted signal, the substitution signal is delayed an integral number, N, of cycles of the audio carrier. The number N is chosen to be small, resulting in the change in the modulating signal corresponding to the stored portion of the carrier being small. The affect on the baseband signal is that during instances where defects occurred the signal appears to have been sampled and held, but the duration is so short that they are not audibly distinguishable.

Abstract: Audio signals recovered from a video disc record are applied to a dual mode decoder matrix via track and hold circuits which mute the audio signals in response to defect indicating signals and player mode control signals. A selected one of the mode control signals is applied to the matrix for causing the matrix to form sum and difference output signals at first and second output terminals thereof when at a first logic level and for causing the matrix to produce identical output signals at the output terminals when at a second logic level. Logic circuitry controls the muting and the matrix operating mode to provide compatibility with monophonic, matrixed two channel (e.g., stereophonic) and un-matrixed two channel (e.g., bilingual) video disc records and suppression of record noise in all operating modes.

Abstract: In a video disc player, a stylus arm, having a track-following stylus at one end thereof, has its other end secured to a pickup cartridge by means of a compliant member. A conductive flylead disposed in the cartridge provides an electrical connection between an electrode incorporated in the stylus and a terminal disposed in the cartridge. The pickup cartridge is removably received in an arm carriage which is translated along a path disposed radially of the disc record during playback. Reception of the cartridge on the carriage establishes an electrical contact between the cartridge terminal and signal pickup circuits in the player. The pickup circuits additionally serve to sense a stylus position representative capacitance formed between the flylead and a second electrode mounted on the cartridge adjacent thereto.

Abstract: Disclosed is a crosstalk attenuator system for reducing the crosstalk which occurs at the time of separating and reproducing the original signals from the video disc recording medium on which a video signal and a voice signal have been recorded as a compound signal on the same track. In the system, a first multiplier receives both the signals separated from the medium to analyze the relative relation between the signals and thus to generate an output signal according to the amount of the crosstalk between the signals; a second multiplier receives the output signal and one of the signals to generate a feedback signal equivalent to the other crosstalk signal component mixed in one signal, and the feedback signal is subtracted from the other signal component thereby to reduce the crosstalk.

Abstract: A method and apparatus are disclosed for achieving improved efficiency and economy in the transfer of information signals from a first to a second recording medium utilizing an optical storage medium as an intermediate transfer medium. Information signals from a first recording medium are reproduced and recorded onto a second recording medium at speeds in the range of 2 to 200 times normal speed.

Abstract: A recording medium, such as a light-reflective video disc, having a plurality of substantially parallel information tracks, each track formed by a succession of spaced, information-bearing indicia having reduced reflectivity. Each track records both a modulated carrier signal and a pilot signal, the pilot signal having a prescribed frequency substantially lower than a substantial portion of the modulated carrier signal. The duty cycle of the spaced indicia forming each track varies in accordance with the phase angle of the recorded pilot signal, and the pilot signal's phase angle is aligned with itself on adjacent tracks.

Abstract: In a video disc player, a stylus arm, carrying a track-following stylus at one end thereof, has its other end secured to an arm cage by a compliant member. The arm cage is translated along a path disposed radially of the disc record during playback. Pickup circuits are employed for sensing the variations in a signal representative capacitance formed between an electrode incorporated in the pickup stylus and conductive material disposed in the record to recover prerecorded information from a spiral track disposed on the record. A stylus position indicative capacitance, established between a first electrode secured to the stylus arm and coupled to the pickup circuits and a second electrode mounted to the carriage in the vicinity of the first electrode, is modulated at a given frequency rate. Circuitry is provided for sensing signals at a given frequency appearing at the output of the pickup circuits to generate a signal indicative of the position of the pickup stylus relative to the arm cage.