公开(公告)号：WO1990016123A1

公开(公告)日：1990-12-27

申请号：PCT/JP1990000769

申请日：1990-06-13

Applicant: FUJITSU LIMITED ,  MIZUTANI, Yasunao ,  KAKU, Takashi

Inventor： FUJITSU LIMITED

IPC: H04L07/08

CPC classification number: H04L27/38 ,  H04L7/048

Abstract: A modem comprising error control encoder means (16) which adds redundancy according to a predetermined procedure to a transmission bit sequence from bit processing means (10) on the transmitting side (1) and encodes them; data sequence-to-coordinate conversion means (18) which converts a bit sequence from said error control encoder means (16) into a signal point coordinate on a complex plane; coordinate rotating means (20) that rotates said converted signal point coordinate based on frame phase data from said frame phase generating means (12); coordinate rotating means (34) which rotates the reception point coordinate reversely to that of the coordinate rotating means (20) on the transmitting side based on the frame phase data of frame phase generating means (28) of the receiving side; second judging means (38) that judges the signal point of the maximum likelihood and corrects error in the reception point coordinate by utilizing the redundancy added by the error control encoder means (16) of the transmitting side; and judging means (40) which judges the presence or absence of an out-of-frame synchronism condition based on a distance between a judging point by said second judging means (38) and a demodulation reception point on the complex plane; wherein out-of-frame synchronism is quickly detected. In the modem, furthermore, values for evaluation are set for the transition series of the signals, the transition series of received signals of the maximum likelihood is selected based on the evaluation values renewed for each reception of signal on the receiving side, error control signal is decoded to correct error at a demodulated signal point, and error is corrected in the data transmission.

公开(公告)号：WO1990010993A1

公开(公告)日：1990-09-20

申请号：PCT/JP1990000356

申请日：1990-03-16

Applicant: FUJITSU LIMITED ,  DANGI, Ryoichi ,  FUJIYAMA, Takehiko ,  USUI, Toshiaki ,  KAWABATA, Takashi

Inventor： FUJITSU LIMITED

IPC: H04N07/15

CPC classification number: H04N21/2368 ,  H04B14/046 ,  H04N7/148 ,  H04N7/15 ,  H04N7/54 ,  H04N19/152 ,  H04N19/50 ,  H04N21/2335 ,  H04N21/23439 ,  H04N21/242 ,  H04N21/2662 ,  H04N21/4341

Abstract: A system for transmitting and receiving multiplexed video and audio signals. The video and audio signals are balanced to enhance the transmission quality and to use the transmission capability fully under the condition of a limited transmission capacity. At least one of the information contents of the video and audio signals is detected. According to this detection, the transmission contents are controlled in respect to the transmission ratio of the video and audio signals and the correction of the difference between the processing speeds of the two signals. Hence, the transmission quality is improved, especially in TV conference systems having only insufficient transmission capacities.

公开(公告)号：WO1990008441A1

公开(公告)日：1990-07-26

申请号：PCT/JP1990000036

申请日：1990-01-12

Applicant: FUJITSU LIMITED ,  KINOSHITA, Kazumi ,  TAKATO, Kenji ,  TOJO, Toshiro

Inventor： FUJITSU LIMITED

IPC: H04M03/18

CPC classification number: H04M19/008 ,  H04M3/30 ,  H04M19/006

Abstract: This invention relates to an earth detecting circuit for a long-distance subscriber's circuit in a small-capacity digital electronic switch-board. A DC/DC converter of a power source for supplying electric power is stopped when an earth is detected. Upon receiving a stop signal, the DC/DC converter converts the source voltage for the subscriber's circuit into the voltage of the system power source for the switch-board, i.e., the voltage before the conversion by the DC/DC converter. The supply resistors in the power supplying circuit are not broken even when the current continues to flow through the supply resistors because of the earth, and the alarm state is kept until the operation for resume is performed.

公开(公告)号：WO1990007829A1

公开(公告)日：1990-07-12

申请号：PCT/JP1990000011

申请日：1990-01-08

Applicant: FUJITSU LIMITED ,  OBANA, Yuji ,  HIRAMOTO, Masanori ,  TANAKA, Masayuki

Inventor： FUJITSU LIMITED

IPC: H04J03/00

CPC classification number: H04J3/047 ,  H04J3/0608 ,  H04J3/1611 ,  H04J2203/0089

Abstract: A digital signal multiplexer of this invention comprises n (an arbitrary integer) multiplexing circuits (11 to 1n) that converts signals input from a plurality of circuits into m (an arbitrary integer) parallel signals having a first transmission speed to which an additional bit is added, a parallel-serial converter circuit (40) which converts m parallel signals sent from n multiplexing circuits into multiplexed signals of the serial form, and buses (30) that connect n multiplexing circuits and the parallel-serial convert circuit together. Each of the n multiplexing circuits has a circuit that successively sends the m parallel signals onto the buses using pulse signals of a second transmission speed which is n times as fast as the first transmission speed. A digital signal separator of the invention comprises a serial-parallel converter circuit (75) for converting the serial input signals into m (an arbitrary integer) parallel signals having a predetermined speed, n (an arbitrary integer) separating circuits (51 to 5n) that separate the additional bit from the m parallel signals of the serial-parallel converter circuit (75) and send the signals onto a plurality of circuits at the above predetermined speed, and buses that connect the serial-parallel converter circuit (75) and the n separating circuits together. Each of the n separating circuits has means for receiving signals from the serial-parallel converter circuit sent onto the buses at a clock timing of the same speed as the predetermined transmission speed.

公开(公告)号：WO1990002454A1

公开(公告)日：1990-03-08

申请号：PCT/JP1989000870

申请日：1989-08-25

Applicant: FUJITSU LIMITED ,  MORI, Masakazu ,  ARAI, Masanori ,  TAKATSU, Kazuo ,  FUJIMOTO, Naonobu ,  YAMAGUCHI, Nobuhide

Inventor： FUJITSU LIMITED

IPC: H04J03/08

CPC classification number: H04J3/08

Abstract: Disclosed is a drop/insert selecting system in an optical transmission system. To decrease the circuit scale, the system comprises a switching unit (4, 4') having a plurality of input terminals for receiving a plurality of input channels and a plurality of output terminals, each of the input channels conveying a frame synchronization signal and a channel number; at least one drop/insert unit (51, 52, 51', 52') for sequentially generating channel preselection signals until a frame synchronization is established, and for dropping or inserting necessary signals from or into a corresponding one of the necessary channels incorporated into the drop/insert units when a frame synchronization is established; and a channel selecting unit (6, 6a, 6b) for generating a plurality of channel selecting signals in response to each of the channel preselection signals, each of the channel selecting signals functioning to connect each of the output terminals to one of the plurality of input terminals; the remaining output terminals of the switching unit being connected to through-channels to which no drop/insert means is connected.

Abstract translation: 公开了一种光传输系统中的放置/插入选择系统。 为了减小电路规模，系统包括具有用于接收多个输入通道的多个输入端子和多个输出端子的开关单元（4,4'），每个输入通道传送帧同步信号和 频道号码 至少一个用于顺序产生信道预选择信号直到帧同步建立的插入/插入单元（51,52,51'，52'），以及用于将必要信号从或并入相应的一个所需信道 建立帧同步时的丢弃/插入单元; 以及响应于每个信道预选信号产生多个信道选择信号的信道选择单元（6,6a，6b），每个信道选择信号用于将每个输出端连接到多个 输入端子; 开关单元的剩余输出端子连接到没有插入/插入装置的通道。

公开(公告)号：WO1990001902A1

公开(公告)日：1990-03-08

申请号：PCT/JP1989000881

申请日：1989-08-29

Applicant: FUJITSU LIMITED ,  HAYAKAWA, Kenichi ,  KAWABE, Kenji ,  WATANABE, Kazuhiro ,  MATSUI, Kiyoto ,  SHIMURA, Takaki ,  TAKEDA, Shiro

Inventor： FUJITSU LIMITED

IPC: A61B08/00

CPC classification number: A61B8/4281 ,  A61B8/4209 ,  G10K11/02

Abstract: An acoustic coupler combined with an ultrasound probe, made of a gel a part of which is hardened for providing holding means for holding the probe for lifting up the probe with the coupler and another part of which is used to an acoustically transparent path between the probe and a surface of an object to be acoustically inspected. Polyvinyl alcohol (PVA) is a typical material for the gel, and the coupler is fabricated by molding a PVA solution by partially increasing concentration of PVA and/or a repeating frequency of refrigerating and thawing the PVA solution, compared with those for the transparent path, in a molding process of the coupler.

Abstract translation: 一种与超声波探头结合的声耦合器，其由凝胶制成，其一部分被硬化以提供保持装置，用于保持用于将探针提升的联接器，并且另一部分用于探头之间的声透明路径 以及要被声学检查的物体的表面。 聚乙烯醇（PVA）是凝胶的典型材料，与透明路径相比，通过部分增加PVA的浓度和/或制冷和解冻PVA溶液的重复频率，通过模制PVA溶液来制造耦合器 ，在耦合器的模制过程中。

公开(公告)号：WO1989012292A1

公开(公告)日：1989-12-14

申请号：PCT/JP1989000580

申请日：1989-06-07

Applicant: FUJITSU LIMITED ,  TANIGUCHI, Tomohiko ,  ISEDA, Kohei ,  OKAZAKI, Koji ,  AMANO, Fumio ,  UNAGAMI, Shigeyuki ,  TANAKA, Yoshinori ,  OHTA, Yasuji

Inventor： FUJITSU LIMITED

IPC: G10L09/14

CPC classification number: G10L19/06 ,  G10L19/04

Abstract: A plurality of encoding means performs a local decoding of a speech signal and extracts excitation information and vocal tract information from a speech signal for an encoding. The transmission rate ratios between respective encoded information are different. An evaluation/selection means evaluates the quality of respective decoded signals subjected to a local decoding in the encoding means, determines the most suitable encoding means from among a plurality of encoding means based on a result of the evaluation, and selects the most suitable encoding means, thereby outputting the selection result as selection information. The decoding means decodes a speech signal based on selection information, vocal tract information and excitation information. Evaluation/selection means selects the output from the encoding means in which the quality of a locally decoded signal is the most preferable. When vocal tract information changes little, the vocal tract information is not output, thereby causing the surplus of the quality of information. As much of the surplus of information as possible is assigned to a residual signal. Thus, the quality of a decoded speech signal is improved.

Abstract translation: 多个编码装置执行语音信号的本地解码，并从用于编码的语音信号中提取激励信息和声道信息。 各个编码信息之间的传输速率比是不同的。 评估/选择装置在编码装置中评估经过本地解码的各个解码信号的质量，基于评估结果从多个编码装置中确定最合适的编码装置，并且选择最合适的编码装置 从而输出选择结果作为选择信息。 解码装置根据选择信息，声道信息和激励信息对语音信号进行解码。 评估/选择装置选择编码装置的输出，其中本地解码信号的质量是最优选的。 当声道信息变化不大时，声道信息不输出，从而导致信息质量过剩。 尽可能多的信息剩余被分配给残留信号。 因此，提高了解码语音信号的质量。

公开(公告)号：WO1989009420A1

公开(公告)日：1989-10-05

申请号：PCT/JP1989000299

申请日：1989-03-22

Applicant: FUJITSU LIMITED ,  KOMATSU, Masashi ,  NODA, Hideki ,  KUSAKA, Satoshi

Inventor： FUJITSU LIMITED

IPC: G02B06/30

CPC classification number: G02B6/30

Abstract: In connecting an optical fiber (15) to an optical waveguide (12) formed in a waveguide substrate (11), a first groove (13) is formed in the substrate to expose one end of the optical waveguide (12), and a second groove (14) is formed at right angles with the first groove. The optical fiber is fitted into the second groove in a manner that the end surface of the optical fiber (15) is brought into intimate contact with the end surface of the optical waveguide (12), and the optical fiber is secured in the second groove with an adhesive. Thus, there is provided a method of connecting the optical fiber and the optical waveguide together maintaining excellent temperature characteristics and impact resistance.

Abstract translation: 在将光纤（15）连接到形成在波导基板（11）中的光波导（12）的同时，在基板上形成第一凹槽（13）以露出光波导（12）的一端，而第二凹槽 槽（14）与第一槽成直角。 光纤以使光纤（15）的端面与光波导（12）的端面紧密接触的方式嵌入第二槽中，光纤固定在第二槽 用粘合剂。 因此，提供了一种将光纤和光波导连接在一起，保持优异的温度特性和抗冲击性的方法。

公开(公告)号：WO1989008374A1

公开(公告)日：1989-09-08

申请号：PCT/JP1989000176

申请日：1989-02-22

Applicant: FUJITSU LIMITED ,  YOKOTA, Takashi ,  KIKUCHI, Eiji ,  MIURA, Shoichi ,  FURUTA, Hirosuke ,  SHIGA, Masayuki

Inventor： FUJITSU LIMITED

IPC: H05K01/02

CPC classification number: H05K1/0204 ,  G02B6/42 ,  H01L25/167 ,  H01L2224/48091 ,  H01L2224/48137 ,  H01L2924/19105 ,  H05K1/0274 ,  H05K2201/09054 ,  H05K2201/10416 ,  H01L2924/00014

Abstract: A substrate for mounting optical parts and electric circuitry parts, wherein an insulating substrate on which an electric circuit is formed is provided with a metallic portion onto which will be welded optical parts. In contrast with this constitution, an insulating layer on which an electric circuit will be formed may be provided on a metal plate to which optical parts are welded. The device constituted using this substrate helps improve frequency band characteristics and helps stabilize the optical coupling efficiency for extended periods of time.

Abstract translation: 一种用于安装光学部件和电路部件的基板，其中形成有电路的绝缘基板设置有金属部分，焊接光学部件。 与该结构相反，可以在其上焊接有光学部件的金属板上设置将形成电路的绝缘层。 使用该衬底构成的器件有助于改善频带特性，并有助于在长时间内稳定光耦合效率。

公开(公告)号：WO1989007788A1

公开(公告)日：1989-08-24

申请号：PCT/JP1989000131

申请日：1989-02-09

Applicant: FUJITSU LIMITED ,  NAGAKURA, Masanao

Inventor： FUJITSU LIMITED

IPC: G03G15/00

CPC classification number: G03G15/0896 ,  G03G15/0882 ,  G03G15/0898

Abstract: This invention relates to a developing unit for use in developing a latent image on a medium, wherein a cartridge setting portion (5a) of the developing unit (15) is provided with a means for preventing the leak of the developing powder during the transportation of the developing unit (15). The leak preventing means consists of a tubular member (210) having an opening (240) and formed to a shaped identical with that of a supplementary toner cartridge, whereby the leak of the toner can be prevented simply.