Abstract: An information recording apparatus such as an optical disc that can avoid an unrecordable condition between a power-on operation and an available state for recording thereby to solve a problem that an image taking chance is missed in a recording step, wherein its constitution is such that: receiving a command to turn on the apparatus after switching, a system controller drives a power-supply circuit to activate a drive controller and a memory controller; if the optical disc is not replaced while in power-off operation by a sub-battery, the system controller issues a request for high-speed activation, based on information stored in an EEPROM, to the drive controller, and drives plural drive control units one after another thereby to establish an activation period confirmedly, allowing the memory controller to accept a request for a recording start from the system controller without waiting for a report of activation completion to be issued by the drive controller.

Abstract: An optical disk apparatus which can carry out tilt control using a signal of a focus control system so as to improve the recording/reproducing performance of an optical disk. The optical disk apparatus includes a motor which rotates the optical disk, an optical pickup which reads at least information from the optical disk being rotated by the motor, a first memory which uses information of a rotation angle of the optical disk from the optical pickup as an address, a second memory which stores an offset by which information stored in the first memory should be shifted and then read, and a control portion which reads the information stored in the first memory after shifting the information by the offset stored in the second memory and which carries out tilt control using the read information.

Abstract: An optical disk apparatus which can carry out tilt control using a signal of a focus control system so as to improve the recording/reproducing performance of an optical disk. The optical disk apparatus includes a motor which rotates the optical disk, an optical pickup which reads at least information from the optical disk being rotated by the motor, a first memory which uses information of a rotation angle of the optical disk from the optical pickup as an address, a second memory which stores an offset by which information stored in the first memory should be shifted and then read, and a control portion which reads the information stored in the first memory after shifting the information by the offset stored in the second memory and which carries out tilt control using the read information.

Abstract: An information recording and reproducing apparatus is disclosed, wherein a hard disk drive or a flash memory in a video camera is accessed by a personal computer having a control program for the recording and reproducing process, through a USB-I/F circuit kept on. A CPU in the video camera, on the other hand, is connected to an external dubbing optical disk having a control program for the recording and reproducing process, through a SATA-I/F circuit only in the case where a user command is given through a switch or power is supplied from an AC adaptor. As a result, the connection with the personal computer is established at an arbitrary timing, and the I/F circuit of the external optical disk can save the power consumption.

Abstract: An information recording apparatus such as an optical disc that can avoid an unrecordable condition between a power-on operation and an available state for recording thereby to solve a problem that an image taking chance is missed in a recording step, wherein its constitution is such that: receiving a command to turn on the apparatus after switching, a system controller drives a power-supply circuit to activate a drive controller and a memory controller; if the optical disc is not replaced while in power-off operation by a sub-battery, the system controller issues a request for high-speed activation, based on information stored in an EEPROM, to the drive controller, and drives plural drive control units one after another thereby to establish an activation period confirmedly, allowing the memory controller to accept a request for a recording start from the system controller without waiting for a report of activation completion to be issued by the drive controller.

Abstract: In an information recording apparatus, for conducting finalizing process on a removable recording medium with certainty, on which information is recorded in an easy format contained within a portable equipment in real-time manner, wherein the finalizing process is executed (steps 102, 103 and 104) when a predetermined amount of capacity remains in a battery 22, or when an external electric power source is connected to (20), depending upon a disc recording medium 32. Also, providing electric power saving (37) during time-period of this process and means (16) for inhibition of camera operation, for stoppage on a way and for re-recording, realizes the certain finalizing process. Further, a means is provided for conducting that process at high speed. Therefore, the finalizing process can be achieved with stability even in a portable equipment.

Abstract: An information recording apparatus such as an optical disc that can avoid an unrecordable condition between a power-on operation and an available state for recording thereby to solve a problem that an image taking chance is missed in a recording step, wherein its constitution is such that: receiving a command to turn on the apparatus after switching, a system controller drives a power-supply circuit to activate a drive controller and a memory controller; if the optical disc is not replaced while in power-off operation by a sub-battery, the system controller issues a request for high-speed activation, based on information stored in an EEPROM, to the drive controller, and drives plural drive control units one after another thereby to establish an activation period confirmedly, allowing the memory controller to accept a request for a recording start from the system controller without waiting for a report of activation completion to be issued by the drive controller.

Abstract: A data recording/reproducing apparatus includes a first power source unit which generates necessary electric power signals from a commercial power source, and a second power source unit which generates a necessary electric power signal from the commercial power source. When a user issues an instruction to interrupt the operation of the power source of the apparatus, the generation of the electric power signal of the first power source unit is stopped, and the electric power is supplied to at least two of a control unit for controlling switching of operation states of the apparatus, a reception unit for receiving a manipulation instruction, and a display unit for displaying thereon data relating to the operation state from the second power source unit.

Abstract: An information recording apparatus such as an optical disc that can avoid an unrecordable condition between a power-on operation and an available state for recording thereby to solve a problem that an image taking chance is missed in a recording step, wherein its constitution is such that: receiving a command to turn on the apparatus after switching, a system controller drives a power-supply circuit to activate a drive controller and a memory controller; if the optical disc is not replaced while in power-off operation by a sub-battery, the system controller issues a request for high-speed activation, based on information stored in an EEPROM, to the drive controller, and drives plural drive control units one after another thereby to establish an activation period confirmedly, allowing the memory controller to accept a request for a recording start from the system controller without waiting for a report of activation completion to be issued by the drive controller.

Abstract: A signal recording/reproducing apparatus includes a first power source unit which generates necessary electric power signals from a commercial power source, a second power source unit which generates a necessary electric power signal from a battery, a recording signal processing unit, and a reproduced signal processing unit. The apparatus further includes time measuring instrument which is supplied with the electric power from the second power source unit, and a charging unit which charges the battery with the electric charges. Whenever the time measuring instrument measures a predetermined time, the generation of the electric power signals from the first power source unit is started, and the battery is charged with the electric charges by the charging unit.

Abstract: An information recording apparatus such as an optical disc that can avoid an unrecordable condition between a power-on operation and an available state for recording thereby to solve a problem that an image taking chance is missed in a recording step, wherein its constitution is such that: receiving a command to turn on the apparatus after switching, a system controller drives a power-supply circuit to activate a drive controller and a memory controller; if the optical disc is not replaced while in power-off operation by a sub-battery, the system controller issues a request for high-speed activation, based on information stored in an EEPROM, to the drive controller, and drives plural drive control units one after another thereby to establish an activation period confirmedly, allowing the memory controller to accept a request for a recording start from the system controller without waiting for a report of activation completion to be issued by the drive controller.

Abstract: An information recording apparatus such as an optical disc that can avoid an unrecordable condition between a power-on operation and an available state for recording thereby to solve a problem that an image taking chance is missed in a recording step, wherein its constitution is such that: receiving a command to turn on the apparatus after switching, a system controller drives a power-supply circuit to activate a drive controller and a memory controller; if the optical disc is not replaced while in power-off operation by a sub-battery, the system controller issues a request for high-speed activation, based on information stored in an EEPROM, to the drive controller, and drives plural drive control units one after another thereby to establish an activation period confirmedly, allowing the memory controller to accept a request for a recording start from the system controller without waiting for a report of activation completion to be issued by the drive controller.

Abstract: An optical disk apparatus includes an intermittent operation unit that causes a recording/standby memory device to accumulate an audio signal and video signal to be recorded and to intermittently read the signals, and causes a spindle motor control circuit and optical head control circuit to be intermittently actuated in response to the signals so that the signals can be recorded on an optical disk, a learning operation unit that obtains control values suited to the spindle motor control circuit and optical head control circuit, and a unit that judges about the necessity of the learning operation according to a temperature change and a surface condition of the optical disk.

Abstract: A recording apparatus of a helical scan system, including a first video head which records video signals on a magnetic tape when a running speed of the magnetic tape is a standard speed and a second video head which records video signals on the magnetic tape when the running speed of the magnetic tape is approximately 1/N of the standard speed, N being an integer larger than 3.

Abstract: In a disk device, when processing is resumed after replacing the disk or cutting off the power supply, in order to acquire disk-related information in a short period of time and reduce the start-up time, the effectiveness of management information recorded on the disk is judged, the finding of the judgment is stored into a memory means capable of storing even when power supply is off, the management information is read out of some of the recording areas of the disk in advance of a recording or reproducing operation if the stored information on the finding of the judgment indicates effectiveness for the inserted disk.

Abstract: A signal recording/reproducing apparatus includes a first power source unit which generates necessary electric power signals from a commercial power source, a second power source unit which generates a necessary electric power signal from a battery, a recording signal processing unit, and a reproduced signal processing unit. The apparatus further includes time measuring instrument which is supplied with the electric power from the second power source unit, and a charging unit which charges the battery with the electric charges. Whenever the time measuring instrument measures a predetermined time, the generation of the electric power signals from the first power source unit is started, and the battery is charged with the electric charges by the charging unit.

Abstract: An information recording apparatus such as an optical disc that can avoid an unrecordable condition between a power-on operation and an available state for recording thereby to solve a problem that an image taking chance is missed in a recording step, wherein its constitution is such that: receiving a command to turn on the apparatus after switching, a system controller drives a power-supply circuit to activate a drive controller and a memory controller; if the optical disc is not replaced while in power-off operation by a sub-battery, the system controller issues a request for high-speed activation, based on information stored in an EEPROM, to the drive controller, and drives plural drive control units one after another thereby to establish an activation period confirmedly, allowing the memory controller to accept a request for a recording start from the system controller without waiting for a report of activation completion to be issued by the drive controller.

Abstract: In a disk device, when processing is resumed after replacing the disk or cutting off the power supply, in order to acquire disk-related information in a short period of time and reduce the start-up time, the effectiveness of management information recorded on the disk is judged, the finding of the judgment is stored into a memory means capable of storing even when power supply is off, the management information is read out of some of the recording areas of the disk in advance of a recording or reproducing operation if the stored information on the finding of the judgment indicates effectiveness for the inserted disk.

Abstract: In an information recording apparatus, for conducting finalizing process on a removable recording medium with certainty, on which information is recorded in an easy format contained within a portable equipment in real-time manner, wherein the finalizing process is executed (steps 102, 103 and 104) when a predetermined amount of capacity remains in a battery 22, or when an external electric power source is connected to (20), depending upon a disc recording medium 32. Also, providing electric power saving (37) during time-period of this process and means (16) for inhibition of camera operation, for stoppage on a way and for re-recording, realizes the certain finalizing process. Further, a means is provided for conducting that process at high speed. Therefore, the finalizing process can be achieved with stability even in a portable equipment.

Abstract: When a video signal reproduced by a helical scan type video signal reproducing apparatus is displayed on the screen of a liquid crystal matrix circuit, a change in brightness on the screen is eliminated in a mode for displaying a trick reproduced image such as a noiseless search image, a still image or the like with respect to a mode for displaying a normally reproduced image, thus providing the user with displayed images causing a less feeling of strangeness. During normal reproduction, where a video signal is continuously written into a liquid crystal display circuit, the brightness of the liquid crystal display circuit is controlled based on the value in a reference brightness register set by the user. During trick reproduction, where a video signal is discontinuously written into the liquid crystal display circuit, the liquid crystal display circuit is controlled to display an image relatively darker than the value in the reference brightness register.