公开(公告)号：JP2003168224A

公开(公告)日：2003-06-13

申请号：JP2001364849

申请日：2001-11-29

Applicant: SONY CORP

Inventor： HARADA TSUTOMU ,  OGIWARA MASARU ,  HAYASHI KAZUYUKI

IPC: G11B7/09

Abstract: PROBLEM TO BE SOLVED: To minimize phase delay caused by signal processing to a specific input signal, while reducing the cost. SOLUTION: The drive is constituted so that the sampling order of a focus error signal FE and a tracking error signal TE at an input changeover switch 41 is set by means of changing over input switches 41A, 41B... of the input changeover switch 41 by using a changeover timing control circuit 46 in an order based on data being set in a setting register 46a. The minimization of the phase difference between the focus error signal FE or the tracking error signal TE selectable by the input changeover switch 41 and a focus drive signal or a tracking drive signal obtained from these servo error signals is attained. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2006033256A

公开(公告)日：2006-02-02

申请号：JP2004207309

申请日：2004-07-14

Applicant: Sony Corp ,  ソニー株式会社

Inventor： OGIWARA MASARU ,  MINAMINO TAKANORI

IPC: H04N5/00

Abstract: PROBLEM TO BE SOLVED: To determine an optimum channel according to a communication state from the whole of a plurality of frequency bands, when using the plurality of frequency bands for enabling communication. SOLUTION: A radio wave strength detector 31 detects the radio wave strength between a transmitting device and a receiving one. A priority defining section 32 defines priority to a 2.4 or 5 GHz band, based on the radio wave strength. When the 2.4 GHz band is compared with the 5 GHz one, the wavelength of the 5 GHz band is shorter than that of the 2.4 GHz band. Therefore, the 5 GHz band is worse than the 2.4 GHz one in the diffraction of an obstacle and reach distance. Then, the priority defining section 32 sets the 5 GHz band to be a priority band so that a channel used for communicating with the receiving device 3 is preferentially determined from the channel of the 5 GHz band at a channel determination section 33, when the radio wave strength is at a prescribed threshold or higher. The channel determination section 33 determines a channel utilized for communication with the receiving device from the channel of the 2.4 GHz band and that of the 5 GHz one, based on the conditions of a priority band, or the like. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：当使用多个频带进行通信时，根据来自多个频带的整体的通信状态确定最佳信道。 解决方案：无线电波强度检测器31检测发射装置与接收装置之间的无线电波强度。 优先权定义部分32基于无线电波强度来定义2.4GHz或5GHz频带的优先级。 当2.4GHz频带与5GHz频带进行比较时，5GHz频带的波长比2.4GHz频带的波长短。 因此，5GHz频带比障碍物衍射中的2.4GHz更差，达到距离。 然后，优先级确定部分32将5GHz频带设置为优先频带，使得在频道确定部分33处，优先地从5GHz频带的频道确定用于与接收装置3通信的信道，当无线电 波强在规定的阈值以上。 信道确定部分33基于优先级带的条件等，从2.4GHz频带的信道和5GHz信道的信道中确定用于与接收设备进行通信的信道。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004266504A

公开(公告)日：2004-09-24

申请号：JP2003053796

申请日：2003-02-28

Applicant: Sony Corp ,  ソニー株式会社

Inventor： YANAGIMOTO KAORU ,  MASATO TAKESHI ,  OGIWARA MASARU ,  TAKAHASHI KATSUYA

IPC: H04L29/08 ,  H04L29/06

CPC classification number: H04L65/608 ,  H04L1/1835 ,  H04L1/1848 ,  H04L1/1874 ,  H04L29/06 ,  H04L65/80 ,  H04L69/16 ,  H04L69/164 ,  H04L69/22 ,  H04L69/40

Abstract: PROBLEM TO BE SOLVED: To enable data that could not be received at a reception side by some sort of causes to be acquired from a transmission side by a retransmission request from the reception side. SOLUTION: In communication using UDP as a transport layer, a signal is transferred to which an RTP header is added. A receiver refers to a sequence number in the received RTP header for confirming the continuity of the number. When data containing a continuous sequence number are not received, the data are determined to be missing and a request for resending the data of the sequence number determined to be missing is sent to a transmitter. Corresponding to the request, the receiver acquires the missing data by receiving the data resent by the transmitter. The system can be applied to the transmitter for sending data and the receiver for receiving the data and improves reliability in communication. COPYRIGHT: (C)2004,JPO&NCIPI

Abstract translation: 要解决的问题：通过来自接收侧的重发请求，通过某种原因从发送侧获取在接收侧无法接收的数据。 解决方案：在使用UDP作为传输层的通信中，传送一个添加了RTP头的信号。 接收机是指接收的RTP报头中的序列号，用于确认数字的连续性。 当没有接收到包含连续序列号的数据时，数据被确定为丢失，并且将重新发送确定为丢失的序列号的数据的请求发送到发射机。 对应于该请求，接收机通过接收发射机重发的数据来获取丢失的数据。 该系统可应用于发送器发送数据，接收器可用于接收数据，提高通信的可靠性。 版权所有（C）2004，JPO＆NCIPI

公开(公告)号：JP2003208725A

公开(公告)日：2003-07-25

申请号：JP2002004926

申请日：2002-01-11

Applicant: SONY CORP

Inventor： OGIWARA MASARU ,  HARADA TSUTOMU ,  HAYASHI KAZUYUKI

IPC: G11B19/00 ,  G11B7/09

Abstract: PROBLEM TO BE SOLVED: To provide an overcurrent preventing device and an optical disk device, by which various kinds of actuators incorporated in an optical disk recording/reproducing device, etc., are protected from the damage. SOLUTION: The overcurrent preventing device is furnished with the actuator mounted on the optical disk device, a supply means 20 for supplying a driving current to this actuator, and a control means 22 for controlling a current value of the driving current supplied from the supply means 20, then the control means 22 is constituted so that the driving current is sampled for every constant time interval and the current values of the sampled driving currents are integrated, and when this integrated value exceeds a limited current, the driving current is made to zero. COPYRIGHT: (C)2003,JPO