公开(公告)号：US3431355A

公开(公告)日：1969-03-04

申请号：US3431355D

申请日：1965-04-05

Applicant: IBM

Inventor： ROTHAUSER ERNST H ,  PAULUS ERWIN F

IPC: G10L19/02 ,  H04M1/00

CPC classification number: G10L19/02

Abstract: 1,073,203. Vocoders. INTERNATIONAL BUSINESS MACHINES CORPORATION. Match 15,1966 [March 25, 1965], No. 11188/66. Heading H4R. Channel. vocoder in which each spectrum analysis channel includes a band-pass filter, a rectifier, and a low-pass filter, or integrator circuit; has a voiced-unvoiced detector the output from which is used to lower the cut-off frequency of the low-pass filter, or increase the integration time of the integrator circuit, when unvoiced sounds are detected; in order to reduce noise in the channels. The voiced-unvoiced detector may cause switching between two alternative filters provided for each channel, Fig. 2 (not shown), or it may modify the filtercircuit, e.g. by operation of switch Si. in the filter of Fig. 3. A typical integrator circuit which might be used in each spectrum analysis channel is shown in Fig. 5 in which the spectrum channel signal is applied to band causes capacitor C to be discharged by an amount proportional to the current applied through R 1' Periodically a signal is applied to line a to cause TR 2 to conduct to charge C up to the supply potential. The charging current, which will depend on the total discharge of C since the last charging pulse, flowing through R3 will produce an output pulse on Ki 1 the amplitude of which is proportional to the integral of the spectrum channel signal over a time equal to the period of the pulse signal applied to line a. The voiced-unvoiced discriminator output is employed to increase the period between the pulses applied to line b during unvoiced sounds.

公开(公告)号：US3626096A

公开(公告)日：1971-12-07

申请号：US3626096D

申请日：1969-02-24

Applicant: IBM

Inventor： MUENCH WALDEMAR KURT VON ,  ROTHAUSER ERNST H

IPC: G01L9/00 ,  G01L23/00 ,  H03M1/00 ,  H04R1/00 ,  H04R19/00 ,  H04R23/00

CPC classification number: H04R19/00 ,  G01L9/0072 ,  G01L23/00 ,  H03M1/26 ,  H04R1/005

Abstract: An arrangement for transforming mechanical or acoustical waves into digital electrical signals is disclosed. The arrangement includes a converter which in principle is a condenser microphone having a diaphragm which is flexible and electrically biased. Also included is a plurality of switching elements (FET''s) disposed in a stiff plate which forms a portion of the condenser microphone and arranged so that they are electrically actuated by the electric field associated with the diaphragm depending on the distance of the diaphragm from an individual switching element. Sampling circuits associated with each of the switching elements apply the outputs of the switching elements to a coding matrix and a binary output representative of the condition of the switching elements at any instant is provided. The arrangement of the switching elements along the radius of the diaphragm and the use of exclusive OR circuits in the sampling circuits are also disclosed.

公开(公告)号：US3564142A

公开(公告)日：1971-02-16

申请号：US3564142D

申请日：1968-07-30

Applicant: IBM

Inventor： ROTHAUSER ERNST H ,  BANDAT KURT F

IPC: G10L19/02 ,  H04B1/66

CPC classification number: H04B1/66 ,  G10L19/02

Abstract: The invention relates to a method of channel vocoder speech synthesis. For representing the speech signals for several independent speech lines, digital speech data stored in data processors are used. In addition, the method provides for the storage of the time-sampled digital description of the transient behaviors of n spectrum channel band-pass filters. Only one such description is needed for synthesizing the speech signals for m speech lines. For a given speech line the transient responses of the band-pass filters are modulated by the frequency function for the given line. The modulated transient values are added for corresponding time samples and stored in a delay line for the given speech line. The stored value of a speech line is released at points in time defined by the excitation function, thus releasing a digital description of the transient response of the set of band-pass filters as if they were excited by a unit pulse and modulated by the frequency function of the given speech line. The digital description is demodulated to an analogue form by conventional means.

公开(公告)号：CA994467A

公开(公告)日：1976-08-03

申请号：CA173048

申请日：1973-06-04

Applicant: IBM

Inventor： BAECHTOLD WERNER ,  ROTHAUSER ERNST H

IPC: B06B1/06 ,  H03M1/74 ,  H04R1/00 ,  H04R17/00

公开(公告)号：CA864140A

公开(公告)日：1971-02-16

申请号：CA864140D

Applicant: IBM

Inventor： MUENCH WALDEMAR K VON ,  ROTHAUSER ERNST H

公开(公告)号：CA1085015A

公开(公告)日：1980-09-02

申请号：CA287337

申请日：1977-09-23

Applicant: IBM

Inventor： ROTHAUSER ERNST H ,  WILD DANIEL

IPC: G06F13/00 ,  H04L12/413 ,  H04J3/08 ,  H04Q11/04

Abstract: MULTI-LEVEL MULTIPLE-ACCESS METHOD A method is disclosed by which several data stations which use a single communication channel, and which are simultaneously ready to transmit a data packet, can send a request for channel allocation, and will be granted the channel each for one data packet transmission, all within one time frame without central control, polling, or collisions. Addresses of all data stations desiring channel allocation are interleaved and superimposed in a specific manner for transmitting the requests, and by observing the resulting common signal, each data station determines when it can send its data packet. An arrangement for a data station is also disclosed which comprises the means necessary for transmitting address characters in an interactive procedure simultaneously with other stations, and for determining the allocated packet time slot.

公开(公告)号：FR2371018A1

公开(公告)日：1978-06-09

申请号：FR7729872

申请日：1977-09-28

Applicant: IBM

Inventor： ROTHAUSER ERNST H ,  WILD DANIEL

IPC: G06F13/00 ,  H04L12/413

Abstract: A method is disclosed by which several data stations which use a single communication channel, and which are simultaneously ready to transmit a data packet, can send a request for channel allocation, and will be granted the channel each for one data packet transmission, all within one time frame without central control, polling, or collisions. Addresses of all data stations desiring channel allocation are interleaved and superimposed in a specific manner for transmitting the requests, and by observing the resulting common signal, each data station determines when it can send its data packet. An arrangement for a data station is also disclosed which comprises the means necessary for transmitting address characters in an interactive procedure simultaneously with other stations, and for determining the allocated packet time slot.