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公开(公告)号：JP2000122740A
公开(公告)日：2000-04-28
申请号：JP28288799
申请日：1999-10-04
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BALISTRERI EMANUELE , BURZIO MARCO
Abstract: PROBLEM TO BE SOLVED: To provide a reference current generation circuit independent of not only changes in power supply voltage and temperature but also technical processes. SOLUTION: A reference current generator includes a pair of identical units G1, G2 for generating respective reference currents and a circuit CL for linearly connecting two references. Each of elements S1, S2 for determining respective operation points by current-voltage characteristics in respective units G1, G2 includes a single transistor(TR) T1 and a pair of TRs T2, T3 belonging to the same type as the TR T1 and connected in series. A differential amplifier AD stably maintains the operation points of respective units G1, G2 when power supply voltage is changed.
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222.发明专利
公开(公告)号：JP2000115748A
公开(公告)日：2000-04-21
申请号：JP22638899
申请日：1999-08-10
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BALESTRI MASSIMO , DE PETRIS GIANLUCA
Abstract: PROBLEM TO BE SOLVED: To allow the user to receive a digital service from a plurality of providers without the need for a plurality of user units. SOLUTION: Services served to the user (U) from a plurality of providers (SP) are identified by respective coded data streams such as MPEG data. Each of the users (U) is provided with a generic type reception means (STB) in common to all the users. Each user is provided with a user unit 105 in a form of a smart card preferably. The user unit 105 that adopts a processing function (VM) identifying, loading an executing at least one permission algorithm assembled in the data stream sent from each provider by using each identification code assembled in the served data stream enables the reception means to use the respective services.
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223.发明专利
公开(公告)号：JP2000029495A
公开(公告)日：2000-01-28
申请号：JP12590299
申请日：1999-05-06
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： FISSORE LUCIANO , GEMELLO ROBERTO , RAVERA FRANCO
Abstract: PROBLEM TO BE SOLVED: To provide a voice recognizing method and a device thereof permitting to obtain good recognition reliability evaluation by recognizing an isolated word within a large vocabulary and improving the recognition accuracy. SOLUTION: The method and device for recognizing a word isolated in a large vocabulary are described, and recognition is executed through two sequential steps (NE, MA) by using the techniques of a neural network and a Markov model, respectively. The results of both techniques are suitably combined so that the recognition accuracy is improved. A combining means (EL) gives also an evaluation of recognition reliability.
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公开(公告)号：JPH10182188A
公开(公告)日：1998-07-07
申请号：JP32060197
申请日：1997-11-07
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BRAGLIA MARCO
IPC: G02B6/00 , C03B37/012 , C03B37/014 , C03B37/023 , C03B37/027 , C03C3/32 , C03C13/04 , H01S3/06 , H01S3/10
Abstract: PROBLEM TO BE SOLVED: To produce a single-mode active optical fiber capable of eliminating conventional defects and to provide a method for producing the optical fiber. SOLUTION: This single-mode active optical fiber has a core prepared from a nonoxide glass doped with a rare earth element and a clad prepared from an oxide glass. The melting temperature of the glass of the clad is lower than that of the glass of the clad and is within the range of the softening temperature of the clad. In a preferred embodiment, the core is prepared from a chalcogen compound glass and the clad is prepared from a silica lead glass. In order to prepare the fiber, an element prepared from the nonoxide glass is introduced into a hole 2 of a capillary 1 made of the oxide glass to thereby provide a preform, which is then drawn at a certain temperature within the range of the softening temperature of the oxide glass. The capillary 1 acts as a container for the molten glass of the core during the drawing step.
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225.发明专利
公开(公告)号：JPH1091578A
公开(公告)日：1998-04-10
申请号：JP21547897
申请日：1997-07-28
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BOSTICA BRUNO , BURZIO MARCO , PELLEGRINO PAOLO
Abstract: PROBLEM TO BE SOLVED: To provide a device and a method to secure the time alignment of two digital signals which are substantially isochronal to each other. SOLUTION: Plural (2 ) pieces of replicas CK1 to CK4 are produced for a 1st signal CKIN having a given phase difference, and the replicas CK3 and CK4 are sampled (4, 5) in response to the rise edge of a 2nd signal DATA. A combination of logical signals is obtained through the above sampling and shows the phase relation between each of replicas CK1 to CK4 and the signal DATA. The output signal CKOIJT of this device is aligned with the signal DATA and corresponds to one of replicas CK1 to CK4 of the signal CKIN that reproduces best the desired alignment condition.
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Patent Agency Ranking
公开(公告)号：JPH09247678A
公开(公告)日：1997-09-19
申请号：JP5253397
申请日：1997-02-21
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： ANDOREA FUINOTERO , MARUKO GANDEIINI , PIERANJIERO GARINO , MAURO MARUCHISHIO
Abstract: PROBLEM TO BE SOLVED: To obtain a multi-function device to operate a compression video sequence by operating the device in one of plural modes corresponding to different functions. SOLUTION: Loading of a parameter given by an external controller to a decoder DIB is controlled by a microprocessor interface IU. When the microprocessor interface IU recognizes a specific configuration of a device on a connection line 14, it is loaded to a configuration register RC. A unit CM generates an address signal and a read command of an external memory SD in any of three macro block format read modes and gives them to an external memory controller. In the case that data are reached or this device MSM is to provide an output in a raster format, the unit CM does not intervene the processing, a controller CME conducts entirely addressing and drives an external memory addressing and control signal in a different write/read mode.
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公开(公告)号：JPH09214208A
公开(公告)日：1997-08-15
申请号：JP2982497
申请日：1997-01-30
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： RUCHIAANO AKATEIINO , JIYORUJIO BERUCHIN
Abstract: PROBLEM TO BE SOLVED: To provide the multi-mode cavity resonator that is resonated in 2 or 3 electromagnetic field modes, does not require a coupling screw and a tuning screw and is designed and manufactured easily and precisely by the design technology with the aid of computer. SOLUTION: The cavity resonator 1 includes at least one waveguide segment with an elliptic cross section and its axis has a prescribed tilt angle with respect to a polarized wave of an incident TE field. Thus, the dual mode cavity resonator is realized, in which two lateral fields TE having orthogonal polarized planes to each other are resonated. The triple mode cavity resonator is obtained by adding waveguide elements CR2, CR3 by which non-axial direction discontinuity is introduced and the longitudinal mode is resonated.
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公开(公告)号：JPH09214207A
公开(公告)日：1997-08-15
申请号：JP2982597
申请日：1997-01-30
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： RUCHIAANO AKATEIINO , JIYORUJIO BERUCHIN
Abstract: PROBLEM TO BE SOLVED: To provide the multi-mode (in general, triple mode) cavity resonator 1 for a waveguide band pass filter without the need for a tuning screw and a coupling screw and for round shaping. SOLUTION: The cavity resonator includes a waveguide element like an iris TR1 and a waveguide segment CR2. The waveguide segment is placed at a position eccentric in general with respect to a general extention of the cavity resonator, especially a major axis Z of the cavity resonator. The cavity resonator is used for a narrow band filter for satellite communication. The filter consisting of the cavity resonator 1 of a type of this embodiment is fully designed with an aid of an electronic computer and requires no calibration.
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229.发明专利
公开(公告)号：JPH09153889A
公开(公告)日：1997-06-10
申请号：JP31569496
申请日：1996-11-13
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MARUKO BURUTSUIO , PAORO PEREGURIINO
Abstract: PROBLEM TO BE SOLVED: To provide a serialigation-parallelization converting circuit for a high speed digital signal. SOLUTION: This serialization-parallelization converting circuit includes a transmitter(TX) and a receiver(RX) on one integrated circuit chip(IC). The transmitter(TX) parallel-serial-converts a data stream, inserts a period word in a prescribed period within this serial scream and line-codes this serial stream. The receiver(RX) draws a clock signal synchronized with the data stream from the serial stream of coded data, decodes data and serial-parallel-converts this decoded signal. These transmitter(TX) and receiver(RX) are constituted to execute the parallel operation of 4 or 8-bit.
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公开(公告)号：JPH08288792A
公开(公告)日：1996-11-01
申请号：JP6025896
申请日：1996-02-23
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： ARETSUSANDORO TORIERI
Abstract: PROBLEM TO BE SOLVED: To provide a delay device for not causing sensible distortion without the need of using a large constituting element. SOLUTION: This delay device (UR) is composed of one or more stages (R1...Rn) and the respective stages are provided with a series of inverters (IN1...IN4). A capacitive load is applied to the output node of the respective inverters. The load is changed by voltage control signals and constituted of the gate capacitance of P type transistors (Tp1...Tp4).
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