公开(公告)号：US3919691A

公开(公告)日：1975-11-11

申请号：US14705271

申请日：1971-05-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： NOLL A MICHAEL

IPC: G06F3/00 ,  G06F3/01 ,  G06F3/033 ,  G06F3/038 ,  G06F3/02

CPC classification number: G06F3/016 ,  G06F3/033 ,  G06F3/0346 ,  G06F3/038

Abstract: Operation of a computer system is enhanced by means of a threedimensional tactile control unit interactively coupled by a software package to the computer. By means of a sticklike mechanism, which is mechanically controlled by a servomotor system and energized by computer-generated signals proportional to a stored definition of a three-dimensional object, the hand of an operator is restrained to move over the surface of the object. Hence, surfaces of a three-dimensional object, otherwise virtually impossible to display, may be ''''felt'''' by the operator.

Abstract translation: 通过将软件包交互地耦合到计算机的三维触觉控制单元来增强计算机系统的操作。 通过由伺服电动机系统机械控制并通过计算机产生的与存储的三维物体的定义成比例的信号激励的棒状机构，操作者的手被限制在物体的表面上移动。 因此，三维物体的表面，否则实际上不可能显示，可能被操作者“感觉到”。

公开(公告)号：US3420955A

公开(公告)日：1969-01-07

申请号：US3420955D

申请日：1965-11-19

Applicant: BELL TELEPHONE LABOR INC

Inventor： NOLL A MICHAEL

IPC: G10L25/90 ,  H04M1/00

CPC classification number: G10L25/90

公开(公告)号：US3566035A

公开(公告)日：1971-02-23

申请号：US3566035D

申请日：1969-07-17

Applicant: BELL TELEPHONE LABOR INC

Inventor： NOLL A MICHAEL ,  SCHROEDER MANFRED R

IPC: G10L25/90 ,  G10L1/04

CPC classification number: G10L25/90

Abstract: The periodicity or aperiodicity of a signal is determined, in a signal analyzer, from the so-called ''''cepstrum'''' of the signal; that is, from the Fourier transform of the logarithm of the power spectrum of the signal. The short-time cepstrum is obtained by passing the signal through a first spectrum analyzer followed by a logarithmic amplifier and a second spectrum analyzer. The cepstrum signal is characterized by a peak at a time proportional to the fundamental period during periodic portions of the signal, and by the absence of a peak during aperiodic portions of the signal.

公开(公告)号：US3555191A

公开(公告)日：1971-01-12

申请号：US3555191D

申请日：1968-07-15

Applicant: BELL TELEPHONE LABOR INC

Inventor： NOLL A MICHAEL

IPC: G10L25/90 ,  G10L1/00 ,  G10L1/04

CPC classification number: G10L25/90

Abstract: The pitch of a complex speech wave is determined by spectrum analyzing the infinitely peak-clipped log spectrum of a centerclipped and infinitely peak-clipped interval of an analogue speech wave.

公开(公告)号：US3493684A

公开(公告)日：1970-02-03

申请号：US3493684D

申请日：1966-06-15

Applicant: BELL TELEPHONE LABOR INC

Inventor： KELLY JAMES M ,  NOLL A MICHAEL ,  SCHROEDER MANFRED R

IPC: G10L19/02 ,  H04B1/66 ,  H04M1/00

CPC classification number: G10L19/02