Abstract: An electric signal measurement apparatus using the electro-optic sampling which is capable of measuring electric signals propagating on a signal line with only a lower disturbance, in a high precision over a wide bandwidth, and economically by a relatively compact apparatus size. The apparatus has a conductor body to be set in one point contact with the signal line, and an electro-optic material which changes a birefringence according to a strength of an electric field coupled by the conductor body, and which has a sufficient thickness between the lower surface and an upper surface such that a potential at the upper surface due to the electric field coupled by the conductor body is effectively zero. A polarization detector for detecting the laser beam with a polarization changed due to a change of the birefringence of the electro-optic material can be provided within a handy type probe body to which a probe head is attached.

Abstract: A private communication system using bus type transmission path, in which a plurality of communication terminal devices for carrying out communications and a system main device for exchanging communications from the communication terminal devices are connected by upward and downward digital transmission paths for transmitting data in forms of upward and downward transmission frames formed by a plurality of cells in fixed length.

Abstract: The present invention provides a transformable linked structure, a deployable diagonal structure, a plane stowage-type deployable truss and a line stowage-type deployable truss with high rigidity and reliability constituted by the above-described transformable linked structure and the above-described deployable diagonal structure, and also provides a plane/line stowage truss structure extremely approximated to a spherical surface using the two types of deployable trusses. The present invention discloses a module linked structure for linking deployable trusses securely and a holding/releasing mechanism for realizing reliable holding and release. Further, the present invention provides a modular deployable antenna with high precision even if it is large-sized which is realized by spreading mesh on the plane/line stowage truss structure.

Abstract: A command for application program is generated based on both a movement of a cursor on a display unit depending upon operation of a pointing device and a voice produced in parallel to the operation when the pointing device is operated to select an object being displayed on the display unit connected to a computer. Particularly, if a moving speed of the cursor in a region of the object has a local minimum value which is less than a predetermined speed, the object is selected as a referent candidate for the voice containing a demonstrative word. If a plurality of referent candidates each having the local minimum value less than the predetermined speed are present for the voice containing the demonstrative word, such object is recognized as a referent for the voice that a time period during when the cursor moves in a region overlaps at maximum with a time period during when the voice is produced.

Abstract: In a method and an apparatus for dereverberation provided speech from speaker is received by a first and second channel microphones which are disposed at different locations, and is input to a first and a second channel reverberant speech input terminal. Input signal in each channel is processed by an inverse filter processor, and a dereverberation evaluation part evaluates dereverberation performance on the basis of an output signal from the inverse filter processor and the input signals of respective channels. Subsequently, filter coefficients in the inverse filter processor are determined and updated in accordance with the evaluation so that a result of evaluation is brought closer to an optimum. By repeating this process, an optimum dereverberation is always enabled in a manner following a variation in an in-room impulse response.

Abstract: In a subband acoustic echo canceller which generates an echo replica from a subband received signal x.sub.k (m) by an estimated echo path in each subband, subtracts the echo replica from a subband echo signal y.sub.k (m) by a subtractor to generate a subband error signal e.sub.k (m) and uses an adaptive algorithm in an echo path estimation part to estimate the transfer function of the estimated echo path from the subband error signal e.sub.k (m) and the subband received signal x.sub.k (m) so that the subband error signal e.sub.k (m) approaches zero, the stop-band attenuation of each band-pass filter of a received signal subband analysis part for generating the subband received signal x.sub.k (m) is set to be smaller than the stop-band attenuation of each band-pass filter of an echo subband analysis part for generating the subband echo signal Y.sub.k (m) to thereby flatten the frequency characteristics of the subband received signals relative to the subband echo signals.

Abstract: An information navigation system based on an information resource topology among information resources in which each information resource is associated with at least one term combination and a set of links, where each term combination specifies a set of terms describing each information resource and each link links information resources with matching term combinations, and for every existing term combination, a set of information resources that contain said every existing term combination form a cluster, where a cluster is defined as a set of information resources for which there exists at least one path between every pair of information resources in said set of information resources such that said at least one path contains only information resources from said set of information resources and a path is defined as a series of information resources connected through links.

Abstract: A packet scrambling communication scheme capable of reducing the processing amount and the processing time required for the scrambling processing and the descrambling processing at the transmitting side and the receiving side. The original data is scrambled at the transmitting side, by dividing the original data into a plurality of data units in packet sizes, assembling packets by storing the data units into the packets and attaching false packet identifiers indicating a scrambled packet order to the packets, and transmitting the packets in the scrambled packet order according to the false packet identifiers from the transmitting side to the network. The packets received from the network are descrambled at the receiving side, by recovering a data unit order information indicating a descrambled order of the data units from the false packet identifiers, and reconstructing the original data from the data units stored in the packets according to the data unit order information.

Abstract: A coordinate address is generated which specifies the position in a square original tile area where pattern data is to be written for each pixel, and a check is made to determine if the coordinate address is adjacent any one of sides of the original tile area. When the written pixel is adjacent any one of sides of the original tile area, the position of a pixel is calculated which is adjacent the written pixel on another tile area adjacent the original tile area along that side, and the position of the adjacent pixel when the adjacent tile area is laid on the original tile area is calculated as a shifted position of the adjacent pixel. The positions of the written pixel and the shifted position are rotated predetermined angle about the center of a polygon at least once to obtain rotational positions. Pixel values are additionally written at these shift and rotational positions.

Abstract: In a CELP coding scheme, p-order LPC coefficients of an input signal are transformed into n-order LPC cepctrum coefficients c.sub.j (S.sub.2), which are modified into n-order modified LPC cepstrum coefficients c.sub.j ' (S.sub.3). Log power spectral envelopes of the input signal and a masking function suited thereto are calculated (FIGS. 3B, C), then they are subjected to inverse Fourier transform to obtain n-order LPC cepstrum coefficients, respectively, (FIGS. 3D, E), then the relationship between corresponding orders of the LPC cepstrum coefficients is calculated, and the modification in step S.sub.3 is carried out on the basis of the relationship. The modified coefficients c.sub.j are inversely transformed by the method of least squares into m-order LPC coefficients for use as filter coefficients of a perceptual weighting filter. This concept is applicable to a postfilter as well.

Abstract: A software analysis protection method capable of preventing an illegitimate use of a software reliably, by making a software analysis difficult without complicating or enciphering the software itself. Software parts dividing the software to be used at the user terminal are distributedly stored in the user terminal and the center, and the software parts stored in the center are transmitted to the user terminal and loaded into missing parts among the software parts stored in the user terminal on a memory so as to make the software operable at the user terminal. Then, the software as developed on the memory is operated at the user terminal. The software parts are down-loaded from the center to the user terminal such that an arranged pattern of the software as developed on the memory is changed at each time of a use of the software at the user terminal.

Abstract: Lead-containing fluoride glass comprises 50-70 mol % of ZrF.sub.4, 3-5 mol % of LaF.sub.3, 0.1-3 mol % of YF.sub.3, and 2-15 mol % of NaF and/or LiF and/or CsF, where LaF.sub.3 +YF.sub.3 =4.5-6 mol %, and further comprises lead. An optical fiber comprises a core made of the lead-containing fluoride glass and a cladding surrounding the core. A process for producing an optical fiber comprises forming a base material for a core of the lead-containing fluoride glass, forming a base material for a cladding of fluoride glass containing 30-60 mol % of HfF.sub.4, and drawing the base materials into an optical fiber at a drawing temperature of 315-340 .degree. C.

Abstract: A chemically amplified positive resist composition contains a novel trifluoromethanesulfonic or p-toluenesulfonic acid sulfonium salt having at least one tert-butoxycarbonylmethoxy group as an acid labile group. The composition is highly sensitive to high energy radiation, especially KrF excimer laser and has high sensitivity, resolution and plasma etching resistance while the resulting resist pattern is heat resistant.

Abstract: Communication between an image-information storage device and a terminal is made possible even in a case where they have images of different image formats. An image data delivery request, transmitted from any of a plurality of terminals and received by a receiving portion, includes information indicating that the terminal has a source format of CIF or QCIF. This information is transferred to a communication control portion which informs the source format control portion of the source format (CIF or QCIF of) the terminal. When the terminal has the CIF source format, the required data transmitted from an image-information storage device are transmitted through a transmitter portion to the terminal. When the terminal has the QCIF source format, a part of the image data transferred from the image-information storage device is extracted and converted into data of QCIF format by the source format control portion.

Abstract: In a chemically amplified positive resist composition comprising an organic solvent, an alkali soluble resin, an acid generator, and an optional dissolution inhibitor, a salt of a pyridine which may have an alkyl, alkoxy, amino or dialkylamino group with an alkylsulfonic acid, arylsulfonic acid or halogen atom is blended. Because of high sensitivity to deep UV and resolution and elimination of the PED problem causing T-top pattern configuration and the skirting phenomenon, the resist composition is improved in dimensional precision and lends itself to fine patterning.

Abstract: A chemically amplified, positive resist composition contains a trifluoromethanesulfonic or p-toluenesulfonic acid bis- or tris(p-tert-butoxyphenyl)sulfonium salt and a nitrogenous compound. The composition is highly sensitive to high energy radiation, especially KrF excimer laser and has high sensitivity, resolution and plasma etching resistance while the resulting resist pattern is heat resistant.

Abstract: A connection control equipment can connect a plurality of calls originating from a terminal to a private side terminal by identifying the calling terminal. Each of the user terminals sets a calling number and a calling sub-address or a user-to-user information for identifying the terminal in a call-setting message. A switching system of the connection control equipment receives the call-setting message and stores the calling number and the calling sub-address or the user-to-user information of the message, and connects the call to a private side terminal with which the same user terminal issuing the just received call is communicating. The switching system can connect calls from the same user terminal to the same private terminal, allowing for any user terminal to freely transmit a plurality of calls without considering how to access a host computer.

Abstract: A frequency conversion circuit having at least one transistor with an input terminal and an output terminal. A frequency signal to be converted or a local oscillator (LO) signal is input to the input terminal, and a converted frequency signal is output from the output terminal. A linear feedback circuit allowing at least a radio frequency (RF) signal and the LO signal to feed back is directly connected across the input and output terminals.

Abstract: A cipher communication system and scheme capable of realizing the cipher communication without affecting the already existing application programs and hardware, and establishing a synchronization at the start and end of the cipher communication. In the cipher communication, the session key generated by the key distribution center are obtained and shared at the first and second terminals at a timing of a request for establishing a cipher communication session between the first and second terminals, and then the cipher communication between the first and second terminals is carried out by using the shared session key.

Abstract: Disclosed is an optical connector connecting apparatus. In the apparatus, a plurality of fixed optical connectors are mounted on a fixed member in a lined-up manner. An optical connector containing member having a movable optical connector mounted thereon is supported on a support member through a small-diameter beam. A moving plate mounted on a base supports the support member, and the movable optical connector is moved in X-axis, Y-axis and Z-axis directions so as to be connected to the fixed optical connector. Therefore, a position deviation at the time of the connection is corrected by the flexing of the small-diameter beam so that fine-positioning is unnecessary.