公开(公告)号：JP2005157832A

公开(公告)日：2005-06-16

申请号：JP2003396872

申请日：2003-11-27

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： KUBO HIROAKI ,  MORIOKA SUMIO ,  CHO AMI

IPC: G06F17/14 ,  H04N19/60 ,  H04N19/625 ,  H04N7/30

Abstract: PROBLEM TO BE SOLVED: To provide a method of an inverse discrete cosine transform (IDCT) for reproducing a compressed image with high fidelity by limiting an accumulation of round-off errors of the decimal point arithmetic.
SOLUTION: The method of the inverse discrete cosine transform includes a step for receiving a temporary data t'(k, v) with 30 bits as a result of executing a one dimensional inverse discrete cosine transform, a mode 0 step for reserving a memory for 11 bits (without including a sign bit S) for use of an integer when the temporary data is stored in an external RAM if the integer of the data t'(k, v) is not within a range of -128 to +127, and a mode 1 step, which, on the other hand, reserves 7 bits (without including a sign bit S) for the integer if the integer is within the range of -128 to +127 and allocates remaining 4 bits to the decimals. Consequently, the method can increase the accuracy of computing the data t'(k, v) without expanding the external RAM required for temporally storing the data t'(k, v).
COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种用于通过限制小数点算术的舍入误差的积累来以高保真度再现压缩图像的逆离散余弦变换（IDCT）的方法。 解决方案：逆离散余弦变换的方法包括作为执行一维逆离散余弦变换的结果，接收具有30位的临时数据t'（k，v）的步骤，用于保留的模式0步骤 如果数据t'（k，v）的整数不在-128到...的范围内，当临时数据存储在外部RAM中时，用于11位（不包括符号位S）的存储器用于整数 +127，另一方面，如果整数在-128至+127的范围内，则为整数保留7位（不包括符号位S），并将剩余的4位分配给 小数点。 因此，该方法可以提高计算数据t'（k，v）的精度，而不会扩展临时存储数据t'（k，v）所需的外部RAM。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004274382A

公开(公告)日：2004-09-30

申请号：JP2003062215

申请日：2003-03-07

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： KUBO HIROAKI ,  FUJITA NORIO

IPC: H04B1/18 ,  H04B14/00 ,  H04J11/00 ,  H04L27/32

CPC classification number: H04L27/32 ,  H04B14/008

Abstract: PROBLEM TO BE SOLVED: To provide a radio communication method for extending a digital transmission band by utilizing two different polarized planes and performing amplitude shift modulation by comparison of relative amplitudes in respective polarized planes and superposing it over the existing phase shift modulation. SOLUTION: The radio communication method comprises; a step of generating codes associated with relative values of amplitude strength of a first polarized wave to be transmitted and a second polarized wave independent of the first polarized wave, correspondingly to transmission data; a step of modulating the first and second polarized waves correspondingly to the codes and transmitting them; a step of receiving the transmitted first and second polarized waves and detecting amplitude strength of the first and second polarized waves; a step of decoding the codes from the detected amplitude strength; a step of reproducing the transmission data from the decoded codes. COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2001144638A

公开(公告)日：2001-05-25

申请号：JP30724199

申请日：1999-10-28

Applicant: IBM

Inventor： KUBO HIROAKI ,  MURAKAMI MASAHIRO

IPC: H04N7/20 ,  H01Q1/12 ,  H04B1/18

Abstract: PROBLEM TO BE SOLVED: To inform a person adjusting the direction of an antenna 70 about the strength of a received signal of the antenna 70 without the need for connecting or adding a special device to the antenna 70 and a connection cable 74. SOLUTION: The satellite broadcast receiver 20 consists of a reception strength information output means 22 that outputs reception strength information denoting the strength of a received signal of the antenna 70, a modulation means 30 that multiplexes the reception strength information with a carrier, and a superimposing means 40 that superimposes the carrier with which the reception strength information is multiplexed onto the connection cable 74.

公开(公告)号：JPH05234099A

公开(公告)日：1993-09-10

申请号：JP34333591

申请日：1991-12-25

Applicant: IBM

Inventor： KAGAMI NAOYUKI ,  KUBO HIROAKI

IPC: G11B7/085

Abstract: PURPOSE: To execute scanning with high reliability at high speed by providing a means for indicating the number of tracks from the present to a target and driving a precise actuator, only when the number of the tracks is equal to below than the prescribed one. CONSTITUTION: A microprocessor and logic 22 inspect the contents of a track counter 21. When the residual number is equal to or blow a prescribed value, a long/short scanning control line 200 is made to be a short scanning state. A change-over equipment 201 is connected to the side of a course servo controller 14 and the change-over equipment 202 is connected to the side of an integration equipment 105. The contents of the counter 21 is inputted to a reference speed generator and reference speed, corresponding to the number of the residual tracks is given to a comparator 104. In the mean time, the signal of a TES sensor 7 is converted into the traveling speed of an optical point 23 by a differential equipment 102 and a rectifying equipment 103 and compared with a reference value by the comparator 104. Difference is adopted as a position difference signal PES with the integration equipment 105. An actuator 3 is driven, based on the PES with a servo controller 12 and a VCM driver 13. A head 1 follows and moves so as to permit the position difference of a lens 24 to be zero. The optical point 23 reaches the target, and the control line becomes a position control state.

公开(公告)号：JPH04134682A

公开(公告)日：1992-05-08

申请号：JP25546590

申请日：1990-09-27

Applicant: IBM

Inventor： KAGAMI NAOYUKI ,  KUBO HIROAKI ,  TAKEKOSHI MAKOTO

IPC: G11B21/10 ,  G11B7/085 ,  G11B7/09

Abstract: PURPOSE: To surely recover a track follow-up operation in a short time by carrying out a seek operation in which a track separated by a prescribed distance is made a target track, in response to a failed detection of the track follow-up operation. CONSTITUTION: With a track follow-up operation failing, the amplitude of a tracking error signal(TES) expands, with a TES error generated and guided to a controller 200, so that the failure of the track follow-up operation is detected. In this case, a seek operation is carried out by setting a target position at five tracks away towards the inside if the present position is near the outer side of an optical disk, and at five tracks away towards the outside if near the inner side. With the seek operation performed, the moving speed of a beam is controlled along a speed profile and, as a result, the beam gains such a speed as capable of being transferred to a follow-up operation at the point of time after moving five tracks. Thus, since a servo control is not turned off after the detection of the failure of the track follow-up operation, its recovery is surely performed.