公开(公告)号：JP2004179854A

公开(公告)日：2004-06-24

申请号：JP2002342268

申请日：2002-11-26

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： MURAKAMI MASAHIRO ,  KUBO HIROAKI

IPC: H04N5/92 ,  H04N5/44 ,  H04N5/46 ,  H04N7/173 ,  H04N19/00 ,  H04N19/423 ,  H04N19/426 ,  H04N19/85 ,  H04N21/438 ,  H04N21/4402

CPC classification number: H04N5/4401 ,  H04N5/46 ,  H04N21/4135 ,  H04N21/4305 ,  H04N21/4334 ,  H04N21/434

Abstract: PROBLEM TO BE SOLVED: To provide a format conversion circuit capable of capturing the video data given from the outside by using an existing digital broadcast receiver system chip without modification.
SOLUTION: A format conversion circuit 100 is provided with: an FIFO memory 101 for writing and reading video data VD synchronously with a sampling clock CK; a header generating circuit 102 for generating a packet header of an MPEG2-TS; a synchronous timing detection circuit 103 for detecting a horizontal synchronizing signal of the video data VD; a counter 104 for counting the number of bytes of the packet header and the number of bytes of the video data VD read from the FIFO memory 101; and a switch 105 for selecting the packet header until the number of counted bytes reaches 4 bytes and thereafter selecting the video data read from the FIFO memory 101.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2000078431A

公开(公告)日：2000-03-14

申请号：JP24549398

申请日：1998-08-31

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレイション

Inventor： HORI MASAHIRO ,  KUBO HIROAKI

IPC: H04N5/04 ,  H04N5/08 ,  H04N5/20

CPC classification number: H04N5/20 ,  H04N5/08

Abstract: PROBLEM TO BE SOLVED: To output only a synchronizing signal while correcting its amplitude into a standard without affecting the video signal and color burst signal of a composite video signal.
SOLUTION: A pedestal voltage Vped (reference level) to be repeated in the same cycle as the synchronizing signal of an inputted composite video signal 30 is detected (14), and a reference voltage Vsync corresponding to the amplitude of the synchronizing signal determined to the standard of the composite video signal is generated (16). Based on the pedestal voltage Vped (reference level) and the reference voltage Vsync, a DC voltage Vh having a voltage level corresponding to the top level of synchronizing signal matching the standard of the composite video signal 30 is generated (18) and synchronized with a synchronizing signal 38 extracted from the composite video signal 30, and the composite video signal 30 and DC voltage Vh are outputted while being switched (24).
COPYRIGHT: (C)2000,JPO

Abstract translation: 要解决的问题：仅输出同步信号，同时将其幅度校正为标准，而不影响复合视频信号的视频信号和色同步信号。 解决方案：检测在与输入的复合视频信号30的同步信号相同的周期中重复的基准电压Vped（参考电平）（14），并且将与根据输入的复合视频信号30确定的同步信号的幅度相对应的参考电压Vsync 生成复合视频信号的标准（16）。 基于基准电压Vped（基准电平）和基准电压Vsync，产生具有与复合视频信号30的标准相匹配的同步信号的顶级电平对应的电压电平的直流电压Vh（18），并与 从复合视频信号30提取的同步信号38和复合视频信号30以及直流电压Vh被输出（24）。

公开(公告)号：JPH04146531A

公开(公告)日：1992-05-20

申请号：JP26398190

申请日：1990-10-03

Applicant: IBM

Inventor： KAGAMI NAOYUKI ,  KUBO HIROAKI ,  OKADA KEIICHI ,  TAKEKOSHI MAKOTO

IPC: G11B7/085 ,  G11B21/08

Abstract: PURPOSE: To prevent a failure in shifting from a seek operation to a track following operation and also a failure of the seek operation by correcting a variation in a feedback amt. at the time of speed control or a variation of a driving signal. CONSTITUTION: A prescribed value is set in a speed profile generator 88 by a controller 200, and a seek in the direction outside a prescribed number of tracks is started. At this time, a timer 400 is simultaneously started to judge whether contents of a track counter 84 is reduced by 100 tracks, and when the 100 tracks are reduced, its required time is measured by the timer 400. In this case, an outside seek TES gain correcting value is evaluated by a prescribed calculating expression to obtain the positive TES gain correcting value if a seek time is shorter than a target time, i.e., a prescribed reference value, and the negative correcting value if larger. By this method, no shifting failure from the seek operation to the track following operation and no failure in the seek operation can be ensured.

公开(公告)号：JP2002112199A

公开(公告)日：2002-04-12

申请号：JP2000273592

申请日：2000-09-08

Applicant: IBM

Inventor： KUBO HIROAKI ,  MURAKAMI MASAHIRO

IPC: H04N5/76 ,  H04L13/08 ,  H04N5/44 ,  H04N5/907 ,  H04N5/92 ,  H04N5/937 ,  H04N7/24 ,  H04N21/234 ,  H04N21/43 ,  H04N21/44 ,  H04N21/442

Abstract: PROBLEM TO BE SOLVED: To provide a receiving reproducing device, that can reduce the effect on reproduction of moving image data due to fluctuations in a data transmission rate produced on a communication channel. SOLUTION: The reception reproducing device 60 consists of a reception means 42, that receives moving image data transmitted via a communication channel, reproduction means 50, 52 that reproduce received moving image data, a buffer B that temporarily stores moving image data received by the reception means 42 and outputs the stored moving image data at a prescribed speed, and a buffer A that temporarily stores the moving image data outputted from the buffer B and supplies the moving image data required for the reproduction processing to the reproduction means 50, 52.

公开(公告)号：JPH11177652A

公开(公告)日：1999-07-02

申请号：JP27678997

申请日：1997-10-09

Applicant: IBM

Inventor： KUBO HIROAKI ,  ASAMOTO KENSHO

IPC: G06F1/12 ,  H04L7/00 ,  H04L29/08 ,  H04N7/62 ,  H04N19/00 ,  H04N19/102 ,  H04N19/134 ,  H04N19/196 ,  H04N19/44 ,  H04N19/70 ,  H04N21/43 ,  H04N7/24

Abstract: PROBLEM TO BE SOLVED: To suppress the generation of omission in data at the time of reproduction without stagnating data in a buffer by smoothly synchronizing transfer on the side of a decoder even when the short moving picture experts group(MPEG) 2 transfer stream of commercial or the like is successively transferred in a short time. SOLUTION: An extraction part 1 extracts synchronizing information POR on the side of transmission from the arriving MPEG 2 transfer stream. A voltage controlled oscillator(VCO) 4 generates a reference clock in the case of decoding data. According to the reference clock generated by the VCO 4, a counter 5 sets the synchronizing information STC of the decoder. A comparator 2 finds the difference of synchronizing information PCR and STC and a control value determining part 3 is provided between the comparator 2 and the VCO 4 and determines the control value corresponding to the difference of the synchronizing information STC and PCR. When the difference of the synchronizing information PCR and STC is more than a prescribed limit value, a discrimination part 6 outputs an instruction to the control value determining part 3 so as to start new transfer synchronization with a current reference clock as a reference.

公开(公告)号：JPH06103587A

公开(公告)日：1994-04-15

申请号：JP4457591

申请日：1991-01-17

Applicant: IBM

Inventor： KAGAMI NAOYUKI ,  KUBO HIROAKI ,  NAKASE KOJI

IPC: G11B7/085 ,  G11B7/095

Abstract: PURPOSE: To maintain a still state by operating a controlled variable for moving an optical disk in the radius direction of the optical disk at equal speed on the optical head which is once stopped. CONSTITUTION: A tracking error signal(TES) showing relative displacement quantity against the track of a spot on the optical disk of a laser beam which an object lens 16 emits is transmitted from the optical head 10 to a track counter 26, and a generated number is given to a micro processor 30. The processor 30 has a timer 32 and an analog value by the D/A converter 34 of the digital value of the controlled variable for controlling the head 10 is given to a VCM (voice coil motor) driver 38 through a switch 36. The driver 38 gives driving voltage or driving current based on the analog value to VCM 24. A servo control part 42 controls VCM 24 so that a relative rotary angle against the linear actuator 14 of a rotary actuator 12 becomes zero. Thus, the still state can be maintained.

公开(公告)号：JPH04139669A

公开(公告)日：1992-05-13

申请号：JP25546990

申请日：1990-09-27

Applicant: IBM

Inventor： KAGAMI NAOYUKI ,  KUBO HIROAKI ,  UENO SHIGEO

IPC: G11B21/08 ,  G11B7/085 ,  G11B7/09

Abstract: PURPOSE: To surely position an optical disk driving device even if an optical disk is inclined by adding/reducing speed of an optical pickup with the use of a tracking error signal. CONSTITUTION: An optical pickup 3 is moved outward after it is pressed to a position where no track guiding groove is formed inside an optical disk 5. Then, a tracking error signal is detected by a tracking sensor 15, with a track counter 21 calculating the number of crossing of the track guiding groove. The crossing state is monitored for the pickup 3 of the track guiding groove by constantly checking this discrete value, so that an adding/reducing/stopping control of the pickup 3 is carried out by CPU 20. Accordingly, without detecting the absolute position using a scale, the initial adjustment of the optical pickup is performed well by surely positioning the disk driving device without complicating the structure even when the pickup is inclined.

公开(公告)号：JPH04134729A

公开(公告)日：1992-05-08

申请号：JP25546790

申请日：1990-09-27

Applicant: IBM

Inventor： KAGAMI NAOYUKI ,  KUBO HIROAKI ,  OKADA KEIICHI

IPC: G11B7/085 ,  G11B7/09 ,  G11B7/095

Abstract: PURPOSE: To constantly perform a seek operation properly regardless of a seek speed by providing a means for controlling the control gain of a focus control means. CONSTITUTION: An optical head 10 is composed of a coarse actuator 20 and a fine actuator 30, with the coarse actuator 20 driven in the direction of a seek operation by a coarse actuator VCM(voice coil motor) 24. In addition, the coarse actuator 20 is provided with a relative position (RPE) detecting sensor 25, focus error signal(FES) detecting sensor 27, and tracking error signal(TES) detecting sensor 29. Then, with a highspeed seek operation performed for a certain period after the commencement of the seek operation, the control gain of the focus control means during this period is made the same value as the control gain in the period of a track following operation; with the seek operation nearing the completion, a control signal is imparted from a controller 200 to a gain control means 300, lowering the control gain of the focus control means to a prescribed value. Thus, the control of the seek operation can be constantly performed properly.

公开(公告)号：JP2002112180A

公开(公告)日：2002-04-12

申请号：JP2000286931

申请日：2000-09-21

Applicant: IBM

Inventor： MURAKAMI MASAHIRO ,  SUGITA KATSUYUKI ,  KUBO HIROAKI

IPC: H04N5/765 ,  G11B20/10 ,  H04N5/44 ,  H04N5/781 ,  H04N5/92

Abstract: PROBLEM TO BE SOLVED: To provide a digital data recording and reproducing device and its method, that records and reproduces digital data of a digital broadcast program or the like at the same time. SOLUTION: The digital data recording and reproducing device 10 is configured, such that a time division control means 18 applies time division control to a recording control means 16 and a reproduction control means 22 for recording data 42 in compliance with the MPEG2-PES(moving picture experts group phase 2-packetized elementary stream) generated by the recording control means 16 for a recording means 20 and to allow the reproduction control means 22 for read the data 42 in compliance with the MPEG2-PES recorded in the recording means 20 at the same time.

公开(公告)号：JPH04134632A

公开(公告)日：1992-05-08

申请号：JP25546690

申请日：1990-09-27

Applicant: IBM

Inventor： KAGAMI NAOYUKI ,  KUBO HIROAKI ,  OKADA KEIICHI

IPC: G11B7/085

Abstract: PURPOSE: To prevent a miscount of TES by providing a positive or negative peak level comparator, which generates a positive or negative peak pulse when TES exceeds a prescribed level on the positive or the negative side, and a logic circuit which generates an output pulse when the positive or the negative pulse is alternately inputted. CONSTITUTION: TES is inputted in a window comparator 300 for detecting zero cross detection. This comparator 300 outputs a zero cross pulse when TES is within a prescribed range including the zero level of TES, and no zero cross pulse when TES is not. The zero cross pulse is inputted in a pulse discriminator 301, the output of which is inputted in a track count logic 500. The logic 500 functions so as to generate an output pulse only when a prescribed pulse is inputted in a prescribed sequence; namely, it functions as a logic circuit for counting the number of tracks. Under this structure, the number of tracks can be accurately counted even if a fault or a pre-pit exists on the recording surface of an optical disk or if a noise is generated by other causes.