公开(公告)号：JP2001053735A

公开(公告)日：2001-02-23

申请号：JP2000188108

申请日：2000-06-22

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BONELLO ROBERTO ,  DA DALT NICOLA ,  MOSCA PAOLO ,  NERVO GIACOLINO ,  QUASSO ROBERTO

IPC: H03L7/06 ,  H04J3/06 ,  H04L7/00 ,  H04L7/033 ,  H04L12/56

Abstract: PROBLEM TO BE SOLVED: To obtain a mechanism capable of efficiently and surely operating band width of extremely wide frequency without imposing any synchronization constraint to a data channel to be transmitted. SOLUTION: Input (3) and output (4) are included in a memory (2) for storage of data, the data is inputted as an input data (Pin) stream under control of an input timing signal (XIN) in the input (3) and the data stored in the memory (2) is read as output data (Pout) under control of a reconstruction timing signal (XOUT) from the output (4). The input timing signal (XIN) is used as an input signal and a corresponding output signal (XOUT) with locked phase is generated by a phase locked loop (7). The reconstruction timing signal is obtained from the output signal of the phase locked loop output 7. A means (8) to measure drift transfer of the remaining phase is provided and affects to a transmission functional band of the phase of the phase locked loop output (7) (23, 9, 10). The means is preferable without using any ring filter.

公开(公告)号：JP2000183734A

公开(公告)日：2000-06-30

申请号：JP35030499

申请日：1999-12-09

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BALISTRERI EMANUELE ,  BURZIO MARCO

IPC: H03L7/099 ,  H03L7/10 ,  H03L7/107

Abstract: PROBLEM TO BE SOLVED: To provide a phase locked loop that is configured to be in operation according to a plurality of characteristics flexibly with high reliability over a sufficiently wide frequency range. SOLUTION: The phase locked loop includes an input comparator 2 that generates a deviation signal, and the deviation signal is used to drive an oscillator 5 to generate an output signal (CLKOUT) locked to an input signal. The oscillator 5 is operated according to a plurality of characteristics under the control of a control means 8 including a search means. The search means executes a 1st search stage for a characteristic group where an operation of the oscillator 5 is allowed by scanning the range that can gradually be reduced according to a general binary search procedure. When the 1st search step is finished, other fine search means identifies an optimum operating point to automatically compensate the fluctuation that may be possible.

公开(公告)号：JP2000155406A

公开(公告)日：2000-06-06

申请号：JP24865399

申请日：1999-09-02

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： ARDITO MARCO ,  MENEGHINI GIANCARLO

IPC: H01L21/306 ,  C03C15/00 ,  G02B5/18 ,  G03F1/00 ,  G03F1/08

Abstract: PROBLEM TO BE SOLVED: To etch the surface of quartz glass with good precision. SOLUTION: A layer 2 of an electrically conductive material is deposited on a quartz glass substrate 1 with a surface to be etched. A pattern that copies an etching pattern to be formed on the surface of the substrate 1 is formed on the electrically conductive material layer 2 by depositing a resist 3 on the layer 2 and exposing and developing the resist 3 to disclose a region of the layer 2 corresponding to the region of the substrate 1 to be etched. A material such as titanium is selected as the electrically conductive material and it is etched with the same etching medium as that used for etching the substrate 1, e.g. CHF3. The removal of the electrically conductive layer 2 and the etching of the substrate 1 in the region not convered with the resist are then carried out in a single step.

公开(公告)号：JP2000113217A

公开(公告)日：2000-04-21

申请号：JP27936999

申请日：1999-09-30

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FRANCINI GIANLUCA ,  QUAGLIA MAURO

IPC: G06T11/00 ,  G06T15/04 ,  G06T17/10 ,  G06T17/20 ,  G06T17/00

Abstract: PROBLEM TO BE SOLVED: To provide a method capable of producing a face model with reality in both a still state and an animation state. SOLUTION: This method is capable of producing a 3D face model and being used, for instance, for the realization of an incarnation (avatar), video communication use, a video game, video production and the production of an advanced man-machine interface. At least one human facial image is given together with a 3D face model M having a summit structure. The 3D face model M includes several surfaces selected from a set consisting of a face surface V, a right eye surface OD, a left eye surface OS, an upper teeth surface DS and a lower teeth surface DI. A set of corresponding points among vertexes of the model M surface and a set of corresponding points on at least one facial image are respectively selected. Next, the model structure M is corrected so that the respective sets of the corresponding points can be coincided with each other.

公开(公告)号：JPH11326657A

公开(公告)日：1999-11-26

申请号：JP10154799

申请日：1999-04-08

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BOSCHIS LAURA ,  GNAZZO ANGELANTONIO ,  ROSSOTTO ORIANA ,  TALLONE LUIGI

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/124 ,  G02B6/10

Abstract: PROBLEM TO BE SOLVED: To obtain a grating which has a narrow reflection factor spectrum distant from a 2nd lobe and reduced equivalent length. SOLUTION: A grating 10 formed in the core of an optical fiber 1 has a modulation profile, which is uneven and asymmetrical in refractive index along the length and the profile is represented with a curve which gradually and monotonously increases from a minimum value which is substantially zero to a maximum value. Here, the minimum value has a substantially horizontal tangent and corresponds to the end of the grating 10 and the maximum value also has a substantially horizontal tangent and corresponds to the other end of the grating 10.

公开(公告)号：JPH11317966A

公开(公告)日：1999-11-16

申请号：JP37504198

申请日：1998-12-14

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： QUACCHIA MARCO

IPC: H04N17/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for allowing distortions to be easily perceptible by obtaining a displacement index against a corresponding block group in a previous frame against a detected block, comparing it with a first threshold and giving distortions only to a block whose displacement index is not less than the threshold. SOLUTION: The sequence of a test picture is digitally converted in an analog/digital converter 2 and is given to a testing device 3 such as a digital encoder/ decoder and a reference picture generation system 4, for example. The system 4 is adapted so that a specified distortion is added to the picture. Generally, the added distortion is selected from distortions introduced by a processing. Outputs of the testing device 3 and of the system 4 are given to a digital/analog converter 5, which gives reformed sequence to a monitor 6 for comparison by an observer. The converters 2 and 5 can mutually and directly be connected.

公开(公告)号：JPH11225369A

公开(公告)日：1999-08-17

申请号：JP32439998

申请日：1998-10-30

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： PIOLINI FLAVIO

IPC: H04B7/24 ,  H04W16/24 ,  H04W16/28 ,  H04Q7/36

Abstract: PROBLEM TO BE SOLVED: To provide a channel assignment method that takes a position of a terminal, a geographic characteristic of cells and also a moving characteristic of the terminal into account. SOLUTION: In the mobile communication system conducting space division multiplex access, a channel to be assigned to a terminal is decided by evaluating an assignment cost to each channel under the condition of re-use of channels. The cost is a function of a mean time that elapses between two consecutive channel assignment jobs to a terminal and then a channel maximizing the time is identified. The evaluation is conducted by using a cost coefficient that takes information relating to cell topology and information of terminal mobility into account. The cost coefficient is decided by re-dividing a cell into sectors in the initializing stage of the system and detecting the moment when cell collision between terminals takes place.

公开(公告)号：JPH11225070A

公开(公告)日：1999-08-17

申请号：JP32440098

申请日：1998-10-30

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BURZIO MARCO

IPC: H03K5/26 ,  H03K3/027 ,  H03K3/03 ,  H03L7/093 ,  H03L7/099 ,  H03L7/10 ,  H04L7/033

Abstract: PROBLEM TO BE SOLVED: To obtain a high performance phase locked loop circuit. SOLUTION: This phase locked loop circuit includes an oscillator 5, which is usually configured as a voltage controlled oscillator VCO and is operated selectively according to different input/output characteristics. The phase locked loop circuit further includes a means 81 that selectively control the operation of the oscillator 5 under any of the input/output characteristics determined selectively according to the operating state of the phase locked loop 1.

公开(公告)号：JPH11139832A

公开(公告)日：1999-05-25

申请号：JP22520398

申请日：1998-07-27

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BRAGLIA MARCO ,  DAI GUOJUN ,  MOSSO SABRINA

IPC: C03B5/02 ,  C03B5/08 ,  F27D11/06

Abstract: PROBLEM TO BE SOLVED: To provide an improved induction electric furnace from which the temp. nonuniformity between different regions is removed. SOLUTION: The supporting device 6' for a crucible 3 of the glass synthesizing induction electric furnace and more particularly the induction electric furnace for fluorozirconate used in an fiber for communication is connected to a pair of sleeves 7, 9 and an annular element 8 constituting an actual supporting member is inserted therebetween. The first sleeve 7 has a such a size in a longitudinal direction that the crucible 3 is supported within this annular element 8 apart a specified spacing from a plane element 5'. The second sleeve has such a size in a longitudinal direction that the top end of the second sleeve exists at a level higher than the top end of the crucible so as to allow the existence of the temp. region uniform over at least the entire height of the crucible.

公开(公告)号：JPH10319255A

公开(公告)日：1998-12-04

申请号：JP15077798

申请日：1998-05-15

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BOSCHIS LAURA ,  ROSSOTTO ORIANA ,  TALLONE LUIGI

IPC: G02B6/13 ,  B29D11/00 ,  G02B20060101 ,  G02B5/18 ,  G02B5/26 ,  G02B6/02 ,  G02B6/10 ,  G02B6/124 ,  G02B6/136 ,  G02B6/255 ,  G02B6/293 ,  G02B6/34

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for uniformly irradiating all fibers or waveguides for writing a grating. SOLUTION: This method and a device simultaneously form the same Bragg grating in a different optical fiber or waveguide, the fiber/waveguide 1 is mounted in line on a common supporting base 2 together with a phase mask 3 and the phase mask 3 gives the desired intensity distribution to a radiating beam for writing a grating. The common supporting base 2 is moved back and forth in the lateral direction to the longitudinal axis of the fiber or the waveguide at appropriately low frequency so as to expose the fiber/waveguide to the radiating beam for a time enough to start changing the refractive index when each fiber/waveguide passes through the radiating beam.