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111. 发明专利

JP2001291317A INFORMATION RECORDING AND REPRODUCING DEVICE AND RECORDING AND REPRODUCING METHOD THE SAME 失效
公开(公告)号：JP2001291317A
公开(公告)日：2001-10-19
申请号：JP2000101196
申请日：2000-03-31
申请人： HITACHI LTD
发明人： HIRAYAMA HIROSHI
IPC分类号： G11B20/10 , G06F12/00 , G11B19/02
摘要： PROBLEM TO BE SOLVED: To minimize the waiting time before reproduction is started by subjecting plural optical disks to recording and reproducing which do not give rise to lacking of transit information. SOLUTION: This device has at least a first recording and reproducing means which subjects a selected first recording medium to recording and reproducing, a second recording and reproducing means which subjects a second recording medium to recording and reproducing and a control means which controls the first and second recording and reproducing means so as to record and reproduce information. The control means previously assures a top region for recording part recording part from the top of the recording information and a temporary region for recording round the continuous information after the same in the second recording medium. The means controls the second recording and reproducing means so as to record the recording information successively from its top to the top region and the temporary region and controls the second recording and reproducing means so as to reproduce the unreproduced information in the information recorded in the top region and the temporary region to maintain the continuity of this information in response with the feasibility of the recording to the first recording medium. The control means controls the first recording and reproducing means so as to record the reproduced information on the first recording medium.

112. 发明专利

JP2000306362A METHOD AND APPARATUS FOR RECORDING INFORMATION ONTO DISK RECORDING MEDIUM 失效
公开(公告)号：JP2000306362A
公开(公告)日：2000-11-02
申请号：JP11114599
申请日：1999-04-19
申请人： HITACHI LTD
发明人： HIRAYAMA HIROSHI
IPC分类号： G06F12/00 , G11B20/10 , G11B20/12 , G11B27/00
摘要： PROBLEM TO BE SOLVED: To shorten the time required for the recording operation or the reproducing operation of information. SOLUTION: When information 14 to be recorded is recorded while a file 8 existing as a discontinuous region and an unrecorded region 12 are used out of the files 8, 9, 10, 11 and the unrecorded region 12 which are worked on a writable optical disk, the information 14 to be recorded is recorded sequentially from the smallest discontinuous region of its head block address. That is to say, information on a file 17 is recorded in the region of the file 8, information on a file 18 is recorded in the region of the file 10, and information on a file 19 is recorded in the unrecorded region 12. Then, the recording order of the recorded files 17, 18, 19 is used as a directory structure so as to be recorded in a path table 6.

113. 发明专利

JPH11353817A ID NUMBER DETECTION PROTECTING METHOD AND CIRCUIT THEREFOR 失效
公开(公告)号：JPH11353817A
公开(公告)日：1999-12-24
申请号：JP15760098
申请日：1998-06-05
申请人： HITACHI LTD
发明人： HIRAYAMA HIROSHI , NAGAI YUTAKA
IPC分类号： G11B20/18
摘要： PROBLEM TO BE SOLVED: To allow a correction block to be correctly written into a memory by allowing a correct ID number to be always loaded into an ID number interpolation counter even when an ID number has not been detected in addition to occurrence of false detection and false correction of the ID number in a normal operation. SOLUTION: In both a pulling-in operation, in which transition from an ID error condition to an ID detection condition occurs, and a normal operation, following the pulling-in operation, to be performed after the detected ID number has been loaded into an ID number interpolation counter, a correct ID number is always loaded into the ID number interpolation counter even when an ID number has not been detected in addition to occurrence of false detection and false correction of the ID number. Thus, a block switching timing pulse and an address within a block are always correctly generated from its counter value and a correction block is correctly written into a memory. At the time when the correct ID number is detected, it can be determined that this ID number is correct, thereby a pulling-in operation in which the number of sectors to be passed is minimized can be performed.

114. 发明专利

JPH11264332A AIR FLOW RATE MEASURING DEVICE INTEGRATED WITH ELECTRICALLY CONTROLLED THROTTLE BODY 失效
公开(公告)号：JPH11264332A
公开(公告)日：1999-09-28
申请号：JP35722498
申请日：1998-12-16
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HIRAYAMA HIROSHI , IGARASHI SHINYA , ITSUJI TAKAYUKI , MAKIE YASUO
IPC分类号： G01F1/68 , F02D9/10 , F02D11/10 , F02D35/00 , F02D41/18 , F02D45/00 , G01F1/684 , G01F1/696 , G01F1/698 , G01F15/04
摘要： PROBLEM TO BE SOLVED: To improve a performance, reduce costs, and form this device in a compact size by providing with a correction control means for correcting a signal from an input flow rate detecting means and controlling throttle means. SOLUTION: An air flow rate signal 113a is corrected from, for example, a throttle valve, an air flow rate value, and a map and the like of a flow rate detecting error under its assembling condition by a throttle valve opening signal 116, and an air flow rate signal 113b after correction is outputted to an ECU as an air flow rate signal detected by an electrically controlled throttle body integrated type flow rate meter. A normal throttle valve opening is mainly controlled by an acceleration opening signal 115, and it is necessitated that the throttle valve opening is controlled for controlling a best air flow rate at the time of idling, for reducing a torque shock generated when an acceleration is rapidly changed, and for controlling the air flow rate matched with a rate for supplying fuel to an engine. And a motor control signal 111 as a control rate of an electrically controlled throttle motor is decided on the basis of the corrected air flow rate signal 113b. It is thus possible to control the throttle opening in the electrically controlled throttle body integrated type air flow rate meter.

115. 发明专利

JPH09120540A OPTICAL DISK AND OPTICAL DISK REPRODUCING DEVICE 失效
公开(公告)号：JPH09120540A
公开(公告)日：1997-05-06
申请号：JP27738695
申请日：1995-10-25
申请人： HITACHI LTD
发明人： HIRABAYASHI MASAYUKI , HIRAYAMA HIROSHI , KAWAMAE OSAMU , NAGAI YUTAKA , TAKEUCHI TOSHIFUMI
IPC分类号： G11B20/10 , G06F3/06 , G11B7/00 , G11B7/005 , G11B7/007 , G11B7/085 , G11B20/12 , G11B27/10
摘要： PROBLEM TO BE SOLVED: To provide an optical disk and an optical disk reproducing device capable of high speed retrieval operation by recording the same data on plural positions on the optical disk. SOLUTION: The optical disk reproducing device surveys whether or not another digital data recorded with the same data as the first digital data exist in addition to the first digital data recorded on the optical disk first of all when the optical disk is loaded, and when another digital data exist, the device stores the positions beforehand. When the device has access, it has access to the nearest place to a present position among these data.

116. 发明专利

JPH08293162A METHOD FOR RECORDING/REPRODUCING DIGITAL SIGNAL 失效
公开(公告)号：JPH08293162A
公开(公告)日：1996-11-05
申请号：JP6029895
申请日：1995-03-20
申请人： HITACHI LTD
发明人： HIRAYAMA HIROSHI , NAKAMURA MASAFUMI , NAGAI YUTAKA , HIRABAYASHI MASAYUKI , TAKEUCHI TOSHIFUMI
IPC分类号： G11B20/12 , G11B7/00 , G11B7/0045 , G11B20/14
摘要： PURPOSE: To perform the switch from reproducing to recording without that a recorded signal is disturbed when the data are rewritten by inserting and recording a synchronizing signal block consisting of the ineffective data of the same system as the synchronizing signal block between data frames each other at a recording time. CONSTITUTION: The synchronizing signal block 104 consists of a synchronizing signal 101 showing a boundary of a data block, an identification signal 102 identifying the contents of the data of the data block and the data 103. The data frame is constituted of plural pieces of the synchronizing signal blocks 104. Further, at the recording time, an ineffective data synchronizing signal block is constituted by storing two blocks of the ineffective data 105 of the same system as the synchronizing signal block 104 in the area where the data are stored between the data frames. Thus, at a rewriting time, only a rewrite part is rewritten correctly by performing the switch of the rewrite operation of the data in the data frame in the synchronizing signal block of the initial ineffective data 105 immediately after the data frame ends.

117. 发明专利

JPH0818891A DIGITAL SOUND SIGNAL REPRODUCING DEVICE 失效
公开(公告)号：JPH0818891A
公开(公告)日：1996-01-19
申请号：JP15218094
申请日：1994-07-04
申请人： HITACHI LTD
发明人： NAGAI YUTAKA , NAKAMURA MASAFUMI , HIRAYAMA HIROSHI , TAKEUCHI TOSHIFUMI
IPC分类号： H04N5/60 , H03G3/00 , H04B14/04 , H04L1/00 , H04N7/015 , H04N7/20
摘要： PURPOSE:To prevent production of a noise sound when reception state is deteriorated in the receiver receiving a broadcast in compliance with the MUSE-High Vision transmission system. CONSTITUTION:The digital sound signal reproduction device is provided with control means 11, 12 muting a signal when the number of sub frames whose correction is disable in one sound frame exceeds a prescribed number and control means 5, 13 muting the signal depending on the detection state of the synchronizing signal in the sound signal. Since the muting of data in one sound frame is started by correction information, muting is applied quickly and since the muting is applied depending on the detection state of the synchronizing signal in the unit of sound frames, muting is not released in mistake even when capability of a correction code is exceeded and production of noise sound is prevented independently of the reception state.

118. 发明专利

JPH07162374A DEVICE AND METHOD FOR REPRODUCING DIGITAL SOUND SIGNAL 失效
公开(公告)号：JPH07162374A
公开(公告)日：1995-06-23
申请号：JP30888693
申请日：1993-12-09
申请人： HITACHI LTD
发明人： NAGAI YUTAKA , NAKAMURA MASAFUMI , HIRAYAMA HIROSHI , TAKEUCHI TOSHIFUMI , TAKAGISHI HIROAKI
IPC分类号： H04N5/60 , H04B14/04 , H04N5/04 , H04N7/08 , H04N7/081
摘要： PURPOSE:To prevent the generation of an abnormal sound at a broadcasting mode changing point by detecting a change in a control code before the switching of an operation mode in accordance with the majority result of the control code in the case of changing a broadcasting mode and executing soft muting. CONSTITUTION:One sound frame is constituted of plural digital sound data, a control code and a synchronizing signal, and the control code reproduces a digital sound signal having constitution multiplexing the same data over N sound frames (N is a nutual number, e.g. 36). The control code out of sound frame signals is sent from a synchronzing signal detection protecting circuit 5 to a control code majority circuit 12, the majority of forward M (e.g. 28) frames out of the control code multiplied N times is found out, and when the majority result is different from the control code before N frames, a code change detecting circuit 14 sends a muting start pulse to a soft muting circuit 11 to gradually suppress the sound. The majority result is delayed up to the N-th frame by a delay circuit 13 and then mode switching is executed.

119. 发明专利

JPH06194199A AIR FLOW RATE MEAURING DEVICE 失效
公开(公告)号：JPH06194199A
公开(公告)日：1994-07-15
申请号：JP5837193
申请日：1993-03-18
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： IGARASHI SHINYA , HIRAYAMA HIROSHI , KOBAYASHI CHIHIRO , TSUTSUI MITSUKUNI , KATO YUKIO
IPC分类号： F02D45/00 , G01F1/68 , G01F1/684 , G01F5/00
摘要： PURPOSE:To provide a highly accurate air flow rate measuring device by decreasing a measurement error caused by a configuration change of an air cleaner and a duct being an air passage upstream of the air flow rate measuring device for measuring intake air quantity of internal combustion engine of automobile. CONSTITUTION:An inlet opening face of an auxiliary air passage 4 is arranged in a region containing the center of a main air passage 5, an outlet confluent part of the auxiliary air passage 4 is arranged near the wall surface of the main air passage 5, and a protrusion 1 or a flat surface part being an obstacle of main flow is arranged upstream the outlet confluent part so that the main flow of the outlet confluent part may be partially decreased in pressure. In order to regulate priority of air intake to an air flow rate detection part at respective portions of the inlet opening face of the auxiliary air passage 4, steps of level difference is provided in the inlet opening face of the auxiliary air passage 4. An output change when an air cleaner having a different flow velocity distribution is fitted, can be reduced by half in comparison with a conventional one, by adopting an output characteristic of an air flow rate measuring device, when an air cleaner generating relatively uniform flow is fitted, as a reference.

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