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公开(公告)号：FR2294591A1
公开(公告)日：1976-07-09
申请号：FR7532212
申请日：1975-10-13
Applicant: IBM
Inventor： PATTEN MICHAEL A
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Patent Agency Ranking
公开(公告)号：DE3269814D1
公开(公告)日：1986-04-17
申请号：DE3269814
申请日：1982-07-27
Applicant: IBM
Inventor： MELAS CONSTANTIN , PATTEN MICHAEL A
Abstract: A switching network is comprised of a plurality of identical intelligent cross point arrays and a network (control) processor (10). Each of the array is a novel intelligent switch and includes both a cross point array as well apparatus to control the cross point array in response to a set of multi bit commands or to formulate a response to a query concerning status of the switching array. The number of command lines connecting network (control) processor to each of the arrays may be as few as two. The cross point array includes a cross point device (switch) for each inlet- outlet combination. The total number of cross points in the network is lower than that dictated by prior art networks.
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公开(公告)号：CA1176359A
公开(公告)日：1984-10-16
申请号：CA407323
申请日：1982-07-15
Applicant: IBM
Inventor： MELAS CONSTANTIN M , PATTEN MICHAEL A
Abstract: DIGITAL SPACE DIVISION EXCHANGE A switching network is comprised of a plurality of identical chips and a network (control) processor. Each of the chips is a novel intelligent switch and includes both a cross point array as well as apparatus to control the cross point array in response to a set of multi bit commands or to formulate a response to a query concerning status of the switching array. The number of command lines connecting network (control) processor to each of the array chips may be as few as two. The cross point array includes a cross point device (switch) for each inlet-outlet combination. The total number of cross points in the network is lower than that dictated by a CLOS network.
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公开(公告)号：CA1089772A
公开(公告)日：1980-11-18
申请号：CA300138
申请日：1978-03-31
Applicant: IBM
Inventor： PATTEN MICHAEL A
Abstract: CIRCUITRY FOR COMPRESSION OF SILENCE IN DICTATION SPEECH RECORDING Dictating apparatus is enhanced for normal and conference speech recording by simple circuitry for detecting "long periods of silence" and compressing the record during these periods, as for example by discontinuing the recording process. Starting and stopping the recording transducing apparatus is a basic concept. Conventional recording apparatus is adapted to function under control of circuitry using available digital circuit modules. Analog speech and like waves are converted to incremental digital form by delta modulating circuitry. "Silence periods" are recognized by digital sensing circuitry coupled to triggering logical control circuitry for operating the recording apparatus only in the presence of desired sound. Basically a predetermined series of indications of "silence" serve to trigger a latching flip-flop circuit for disabling substantially conventional dictating apparatus and the like until the desired sound resumes and the latching circuit is reset for continuing the recording of dictation. The same subcircuitry is applicable to analog or digital recording apparatus. Several embodiments are described with respect to additional desirable features.
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公开(公告)号：CA1035450A
公开(公告)日：1978-07-25
申请号：CA223387
申请日：1975-03-25
Applicant: IBM
Inventor： PATTEN MICHAEL A
Abstract: Conference call provisions are incorporated in a Time Division Multiplex (TDM) signalling exchange wherein the signals are summed energywise and transmitted to a receiving subscriber set without subtracting the signal from that subscriber set and any tendency toward regeneration is obviated by filtered signal reconstruction in conjunction with sample-and-hold signal reconstruction of the TDM signalling system. Simple low-pass, high-pass and band-shaping filters are adequate for the purpose.
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