Abstract:
PROBLEM TO BE SOLVED: To provide a motor controller, a control method and a control program thereof which can control a rotating speed of a capstan motor with higher precision within a large range of rotating speed without large change in a circuit structure. SOLUTION: A rotation detector 20 outputs FG signals SFG1, SFG2 depending on the rotating speed of a capstan motor 10, and an A/D converter 30 converts such FG signals to digital signals. Thereafter, these digital signals are outputted to an angle detection circuit 40 to calculate angular information SA. A comparison circuit 70 generates a pulse signal SP depending on the FG signal. A rotation speed detector 56 of a microcomputer 50 detects the rotation speed of motor depending on the pulse signal SP, selects one of the angular information SA or pulse signal SP depending on the detected rotation speed, outputs the selected signal to a servo operation circuit 54 in order to calculate an error between the rotation speed and the target speed, and outputs an error signal SE. Therefore, a drive circuit 60 generates a drive signal SD depending on the error signal SE to drive the capstan motor 10.
Abstract:
PROBLEM TO BE SOLVED: To provide a retrieval unit for record/playback apparatus capable of quickly and adequately retrieving images recorded on a tape with retrieval data written in a memory wherein addresses corresponding to the recording positions of the images recorded on the tape are set. SOLUTION: Address corresponding to the absolute position of a tape 6 is assigned to a memory 7 disposed on the tape 6 one to one, data of the existence of the record of recorded images and record start position data are written at this address, the record image position on the tape 6 in the tape running direction is quickly and adequately retrieved, on the occasion of retrieving the recorded images, based on the data on the presence absence of record and record start position data in the memory 7 and the retrieved recorded image is displayed on a monitor for a fixed time whereby the user can efficiently retrieve the images recorded on the tape 6 at a high accuracy while confirming the recorded images on the monitor.
Abstract:
PROBLEM TO BE SOLVED: To provide an imaging device that absorb a variation of an imaging optical system for capturing a left-eye image and an imaging optical system for capturing a right-eye image, and generate image data that allows displaying a stereoscopic image without a sense of discomfort, and to provide an autofocus method and a program.SOLUTION: A left-eye image imaging unit 31L converts a subject optical image formed via a left-eye imaging optical system 21L into an electric signal to generate an image signal for a left-eye captured image. A right-eye image imaging unit 31R converts a subject optical image formed via a right-eye imaging optical system 21R into an electric signal to generate an image signal for a right-eye captured image. A control unit 45 independently controls the left-eye imaging optical system 21L and the right-eye imaging optical system 21R, and individually performs focus adjustments for the left-eye captured image and the right-eye captured image. Even if the variation of in-focus lens positions in the imaging optical systems for the left-eye image and the right-eye image occurs, the variation is absorbed and the image data that allows displaying a stereoscopic image display without the sense of discomfort can be generated.
Abstract:
PROBLEM TO BE SOLVED: To reproduce video or audio data without making moving picture reproduction discontinuous from a still picture in a reproducing apparatus which operates in accordance with time information for synchronous reproduction and reproduces moving pictures and still pictures recorded on a recording medium in a recording scheme where a size of data corresponding to one frame is a variable length. SOLUTION: The recording apparatus operates in accordance with the time information for synchronous reproduction. When shifting from a moving picture reproducing mode to a still picture reproducing mode in the case of reproducing moving pictures and still pictures recorded on a recording medium in a recording scheme where the size of data corresponding to one frame is a variable length, driving of the recording medium is stopped or the recording medium is driven backward after picking up all data of a final bank or after being over the final bank. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an angle detector for effectively removing a DC offset. SOLUTION: The angle detector comprises two detecting elements (10) for outputting at least two-phase detection signals in which phases are deviated at 90 deg. and which indicate a rotary angle of a motor, two A-D conversion means (21, 22) for converting analog detection signals to be output from the two detecting elements, two filter means (23, 24) for removing DC components included in the two digital signals converted by the A-D conversion means, an arithmetic means (25) for calculating the rotary position or the rotary angle of the motor from the two output signals of the filter means, and a control means (26) for adaptively controlling the filter means in response to the state of the motor. The filter means have an HPF part and an LPF part. A DC component is added to an A-D conversion signal in the HPF part. The LPF part has a variable gain amplifying means and a means for holding a DC value in which the DC offset is removed. The control means applies the DC component of a predetermined to a high-pas filter part in response to the state of the motor, changes the gain of the variable gain amplifying means to change the time constant of the filter means.
Abstract:
PROBLEM TO BE SOLVED: To provide a recording and reproducing method and a device capable of retrieving desired one of mixedly recorded moving images and still images, optionally setting a reproduction order, continuously and automatically reproducing the image in the optional reproduction order and by which no interruption is caused in reproduction. SOLUTION: In this method, a recording medium in which the moving images and the still images are mixedly recorded is used, when an instruction for starting or ending recording of the moving images or the still images is received, a record formed by making starting information and ending information consisting of an absolute address correspond to a type index of the image is compiled, recorded and stored in a semiconductor memory MIC built in a cassette type external recording medium MeD or an external card type recorder or an index recording area provided on a magnetic tape medium. In the case of reproduction, the record is read from these semiconductor memory, etc., and the desired moving image or still image is reproduced in the optional reproduction order based on the type index, the staring information and the ending information.
Abstract:
PROBLEM TO BE SOLVED: To prevent a user from having an impression that an apparatus fails, by attaining copyright protection while simplifying the configuration of an interface by applying the present invention to a camcorder, for example. SOLUTION: In the present invention, video contents are outputted to external equipment by an interface that attains copyright protection by processing of authentication and encryption. While copy prohibition is instructed, output is stopped and it is notified to a user by displaying a message and outputting warning sound. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a video tape recorder for recording video data by performing variable length encoding through MPEG2 in which desired processing can be executed by moving quickly from the time information of video data reproduced at that moment in time to a recording position on a corresponding magnetic tape, and to provide control method and program of video tape recorder, and a recording medium recording the control program of video tape recorder. SOLUTION: Positional information set on each recording track of a magnetic tape is calculated from decoding time management information of desired video data, and information about the time for storing streaming data in a decoding means. Based on the positional information thus calculated, heading is performed by P picture or I picture at the time of recording and performed by the I picture at the time of reproducing. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To appropriately perform a consecutive recording in a recording/reproducing device in which basic contents recorded in a recording medium are referred, and re-constituted to be written back at the time of the consecutive recording. SOLUTION: In the recording/reproducing device, the basic contents recorded in the recording medium are referred, and re-constituted to be written back at the time of the consecutive recording. The positional information of an error correction processing unit showing the final recording position at the recording termination, is acquired (step S1), and a consecutive recording start standby point before the predetermined distance from a consecutive recording start point is calculated (step S2) with the acquired final recording position as the consecutive recording start point, and a control is made for forming the recording standby state at the calculated consecutive recording start standby point (step S3), then, the recording, the standby of recording, the recording, are repeated in accordance with the positional information of the error correction processing unit at the above recording termination. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a phase angle detection device and its method capable of detecting a phase angle with a small-scale structure and with high resolution. SOLUTION: This device has a selector 22 and a sample hold circuit 23 for producing a single-line analog sampling signal by alternately sampling synchronized analog sine wave signal and cosine wave signal at predetermined time intervals, an analog-digital conversion circuit 24, a separation circuit 25 for separating the cosine wave signal from the sine wave signal, a timing adjustment circuit 26 for adjusting the timing by calculating the sampling value of the same sampling timing in relation to the cosine wave signal and the sine wave signal, and a phase angle detection circuit 27 for detecting the phase angle by using the cosine wave signal and the sine wave signal.