Patents by Inventor Dominick Scordo

Dominick Scordo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9319757
    Abstract: An apparatus includes a wavelength-selective optical switch able to route light between a first optical port and a plurality of second optical ports. The wavelength-selective optical switch includes a bank of optical wavelength-converters. Each wavelength converter of the bank is able to selectively optically couple an optical data stream on a wavelength-channel between the first optical port and individual ones of the second optical ports.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: April 19, 2016
    Assignee: Alcatel Lucent
    Inventors: Aref Chowdhury, Dominick Scordo
  • Publication number: 20140177658
    Abstract: An apparatus includes a wavelength-selective optical switch able to route light between a first optical port and a plurality of second optical ports. The wavelength-selective optical switch includes a bank of optical wavelength-converters. Each wavelength converter of the bank is able to selectively optically couple an optical data stream on a wavelength-channel between the first optical port and individual ones of the second optical ports.
    Type: Application
    Filed: December 24, 2012
    Publication date: June 26, 2014
    Inventors: Aref Chowdhury, Dominick Scordo
  • Patent number: 6163549
    Abstract: Synchronizing local timing units to a central timing unit to determine the difference in timing between external links and the local timing units so as to synchronize the centralized timing unit to the external links. This difference in timing is then transmitted to the central timing unit, which utilizes this information to adjust the timing of the central timing unit. The adjustment to the central timing unit brings it into synchronization with the selected external link. The local timing units are synchronized to the central timing unit via multiple timing paths set up through switching units within the network. Each switching unit switches one bit of data for each group of data being received on each of the external links. In addition, information received by each of the external links designating the accuracy of the external link is transmitted to the central timing unit so that the central timing unit can select the external link having the highest accuracy.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: December 19, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: James R. Bortolini, Dominick Scordo
  • Patent number: 4873663
    Abstract: A memory matrix for storing control words for controlling a common control time division multiplexed (TDM) switch is formed by employing a plurality of shift registers connected in recirculating configuration. Synchronization of control word time slots in the memory matrix to system timing is realized by storing a timing marker which is advanced in identical manner as the control word time slots. If synchronization between the system timing and control word time slots is interrupted, it is restored by controllably inhibiting advancing of the control word time slots and the stored timing marker.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: October 10, 1989
    Assignees: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Lawrence Baranyai, Dominick Scordo
  • Patent number: 4633193
    Abstract: Synchronization of a local timing signal with an incoming reference timing signal is realized by employing a frequency estimator and frequency synthesizer in conjunction with a local fixed oscillator. The frequency estimator includes a first phase-locked loop including an integrator for generating a frequency estimate which is the difference between the frequency of the incoming reference timing signal and the frequency of the fixed oscillator signal. The phase value of the frequency estimate obtained by integrating the frequency estimate is supplied to a second phase-locked loop which includes a digitally controlled oscillator to generate the local timing signal. If the incoming reference timing signal is lost or if there is too large a variation in a phase error signal in the first phase-locked loop, the value of the frequency estimate is held constant. Consequently, the second phase-locked loop never free runs and the local timing signal remains in synchronization with the reference timing signal.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: December 30, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Dominick Scordo
  • Patent number: 4591660
    Abstract: Decryption of a plurality of simultaneously received, randomly phased signals is realized by employing a single data encryption standard module in a time shared manner. A plurality of process state counters, each of which is associated with a received signal, are employed to direct operations of the decryptor on a time shared basis. These operations include the generation on a time shared basis of so-called plain text data for each received signal, generation of corresponding encryption requests, and generation of cipher text data for each received signal which is used to decrypt associated received signal samples.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: May 27, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Dominick Scordo
  • Patent number: 4575860
    Abstract: Clock recovery pulse signals for use in recovering transmitted data are generated by employing a digitally variable phase oscillator. The variable phase oscillator includes an oscillator having a substantially fixed frequency output signal, a phase encoder and a comparator. Coded phase values of the oscillator output signal are periodically generated by the phase encoder. These coded phase values are compared to a prescribed phase value to generate periodically clock recovery pulse signals. The prescribed phase value is obtained in one embodiment by storing the coded phase value being generated upon the occurrence of an incoming data transition and adding a predetermined phase value to it to center the clock recovery pulse signals substantially in the center of the incoming data eye pattern.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: March 11, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Dominick Scordo
  • Patent number: 4574374
    Abstract: In a multilocation conference terminal for transmitting audio and video information to a plurality of remote locations, rapid video and non-disrupted audio switching are obtained by employing a plurality of single composite digital signals each including all the video information from an associated location and all of the audio mixes for all of the locations in a conference. Then, the composite signals are switched prior to conversion for transmission to one or more of the locations. Since each composite signal includes all the audio mixes for all of the locations, when video from anyone of the locations is selected for transmission to any of the locations, the audio mixes for those locations are also switched.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: March 4, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Dominick Scordo
  • Patent number: 4558180
    Abstract: Audio mixes for a plurality of conference locations are controllably obtained by using a matrix multiplication arrangement. The audio mixes for the individual conference locations are obtained by multiplying a dynamically determined gain matrix by an audio input matrix. Coefficient values in the gain matrix are dependent on whether incoming and outgoing transmission paths are assigned to a location and on whether an audio sample is being received or not.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: December 10, 1985
    Assignee: AT&T Bell Laboratories
    Inventor: Dominick Scordo
  • Patent number: 4531024
    Abstract: In a multilocation video conference system, contention for the video to be transmitted to the locations is resolved by employing so-called talker and graphics contention resolution processes. Both the talker and graphics contention processes may be overridden by manual selection of the video to be viewed at each location. In the talker contention process, the video to be transmitted is not switched until one and only one talker location is detected during a predetermined talker timing interval. In the graphics contention process, all requests for graphics transmission are rejected until one and only one graphics transmission request is detected during a predetermined graphics request timing interval. Once transmission of graphics has been assigned to a location, all other locations in the conference are transmitted the graphics video information until the location displaying graphics releases from the graphics transmission mode or there is a manual override.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: July 23, 1985
    Assignee: AT&T Bell Laboratories
    Inventors: John R. Colton, Dominick Scordo, David M. Simmons
  • Patent number: 4529840
    Abstract: In a multilocation video conference system, conference locations are dynamically added to or deleted from an ongoing conference without disrupting it. This is realized by controllably enabling or disabling communications ports assigned to the conference locations in a Multilocation Conference Terminal (MLCT). Both audio information and control channel information transmitted from a conference location assigned to a port are monitored to determine if the audio information is satisfactory and if the control channel communication is "good". If the audio information is unsatisfactory, it is muted and selection of the video from that location as a one-and-only-one talker is inhibited. If the control channel communication is not good the video signal from the conference location is excluded from the conference.
    Type: Grant
    Filed: October 26, 1983
    Date of Patent: July 16, 1985
    Assignee: AT&T Bell Laboratories
    Inventors: John R. Colton, Dominick Scordo, David M. Simmons
  • Patent number: 4529839
    Abstract: In a Multilocation Conference Terminal (MLCT), disruptions in the video being viewed which are caused by switching from one conference location to another are minimized by delaying switching of the video signal until a so-called get ready control signal is received from the conference location to be viewed. The conference location transmits the get ready control signal a predetermined interval prior to transmitting a so-called fast video picture update in response to a request from a Multilocation Conference Terminal (MLCT). Additional possible disruptions in the video are eliminated by minimizing the number of fast video picture updates that are used to serve a multiplicity of requests from other conference locations. When multiple MLCTs are employed in a conference, the MLCTs communicate to each other the video select modes of all the conference locations in the conference, i.e., a manual select mode or an automatic select mode.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: July 16, 1985
    Assignee: AT&T Bell Laboratories
    Inventors: John R. Colton, Dominick Scordo, David M. Simmons
  • Patent number: 4340863
    Abstract: A smooth pulse sequence (SSM) which is a rational fraction (M/N) of an available uniform sequence (SIN) is generated by employing an address generator (10) and a read only memory (ROM 15). Signal representations are stored in the ROM (15) which define the smooth sequence pulse transitions. The address generator (10) is driven by the reference signal and, in turn, generates a sequence of address signals which, when applied to the ROM (15) cause the smooth pulse sequence (SSM) to be read out. The smooth pulse sequence (SSM) is filtered (16) and shaped (17) to obtain a desired uniform pulse sequence (SOUT) which is in synchronism with the reference signal (SIN).
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: July 20, 1982
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Dominick Scordo