Patents by Inventor Adam S. Tom

Adam S. Tom 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).

  • Publication number: 20180302681
    Abstract: Methods and apparatus for delivering video programs are provided. A plurality of video programs are provided in a fragmented, adaptive bit rate format. A request for a respective video program from the plurality of video programs is received from each of a plurality of clients. The requested video programs are multiplexed for delivery to the clients in a multiplex over a shared, fixed-bit-rate transmission channel. In the fragmented, adaptive bit rate format, the fragment delivered to the client may not be the same as the requested fragment and is dependent on multiple criteria, including the bitrate and quality of the requested and delivered fragments, the total available delivery bandwidth, and other fragment requests made on the channel. The resulting multiplex may be either a constant bit rate multiplex or a variable bit rate multiplex.
    Type: Application
    Filed: June 18, 2018
    Publication date: October 18, 2018
    Inventors: YUVAL FISHER, ADAM S. TOM
  • Patent number: 10003851
    Abstract: Methods and apparatus for delivering video programs are provided. A plurality of video programs are provided in a fragmented, adaptive bit rate format. A request for a respective video program from the plurality of video programs is received from each of a plurality of clients. The requested video programs are multiplexed for delivery to the clients in a multiplex over a shared, fixed-bit-rate transmission channel. The requests may be for the same or different video programs. The requests for the video programs may occur at the same or at different times. In the fragmented, adaptive bit rate format, the fragment delivered to the client may not be the same as the requested fragment and is dependent on multiple criteria, including the bitrate and quality of the requested and delivered fragments, the total available delivery bandwidth, and other fragment requests made on the channel. The resulting multiplex may be either a constant bit rate multiplex or a variable bit rate multiplex.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: June 19, 2018
    Assignee: Imagine Communications Corp.
    Inventors: Yuval Fisher, Adam S. Tom
  • Publication number: 20110126248
    Abstract: Methods and apparatus for delivering video programs are provided. A plurality of video programs are provided in a fragmented, adaptive bit rate format. A request for a respective video program from the plurality of video programs is received from each of a plurality of clients. The requested video programs are multiplexed for delivery to the clients in a multiplex over a shared, fixed-bit-rate transmission channel. The requests may be for the same or different video programs. The requests for the video programs may occur at the same or at different times. In the fragmented, adaptive bit rate format, the fragment delivered to the client may not be the same as the requested fragment and is dependent on multiple criteria, including the bitrate and quality of the requested and delivered fragments, the total available delivery bandwidth, and other fragment requests made on the channel. The resulting multiplex may be either a constant bit rate multiplex or a variable bit rate multiplex.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 26, 2011
    Applicant: RGB NETWORKS, INC.
    Inventors: Yuval Fisher, Adam S. Tom
  • Patent number: 6434748
    Abstract: An apparatus for providing VCR-like “trick mode” functions, such as pause, fast-forward, and rewind, in a distributed, video-on-demand program environment. Trick modes are supported by locally altering the viewing speed for each user who requests such functions, without affecting the operation of the central data source in any way. Thus, a virtual unlimited number of viewers are able to enjoy random access to video programming, including virtually continuous trick mode functionality. This is accomplished in a manner that is operable with existing telephone and cable distribution infrastructure.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: August 13, 2002
    Assignee: Imedia Corporation
    Inventors: Paul Shen, Edward A Krause, Adam S. Tom
  • Patent number: 6356708
    Abstract: A compressed video playback system which eliminates playback mode transition artifacts. Transitions between various playback modes are effected in such a manner that transition artifacts are eliminated by delaying playback mode transitions until appropriate frames of data are detected for propagation to the compressed video decoder. In addition, compressed video data retrieval methods are improved for supporting multi-speed playback modes in both forward and reverse directions in an optimal manner.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: March 12, 2002
    Assignee: Imedia Corporation
    Inventors: Edward A. Krause, Paul Shen, Adam S. Tom
  • Patent number: 6304714
    Abstract: An digital home video system providing recording and playback of compressed video programs using an archival storage medium; simultaneous recording and playback using the same archival medium; storage of multiple programs on a single videotape; a full array of trick mode functions; efficient management of the contents of a video tape or other archival storage medium; and real-time random access to video program content, enabling truly interactive playback. These capabilities are provided by combining the best features of an archival storage medium such as digital video tape: namely, potentially large storage capacity, but low tolerance for variable data rate, and essentially linear program access; with the complementary features of a relatively high-access storage device such as a fixed disk drive: namely, tolerance for a highly variable data rate, and random access capability, but relatively lower storage capacity.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: October 16, 2001
    Assignee: Imedia Corporation
    Inventors: Edward A. Krause, Jerrold Heller, Adam S. Tom, Paul Shen
  • Patent number: 5966120
    Abstract: A system for providing efficient constant bit rate distribution of variable bit-rate encoded video programs while facilitating the distribution of encoded video programs, along with Auxiliary Data of a general character, to one or more receivers. At a particular receiver, a customized augmented video program is created by inserting selected portions of the Auxiliary Data into a selected encoded video program. The encoded video portion of the augmented video program can be transmitted, decoded and displayed in real time, while the Auxiliary Data need not be transmitted in real time but can be stored locally at the receiver for real-time presentation at a later time. Real time presentation might include insertion into the video program while non real-time presentation might include insertion into non-video applications separate from the video program.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: October 12, 1999
    Assignee: Imedia Corporation
    Inventors: Efraim Arazi, Adam S. Tom, Paul Shen, Edward A. Krause
  • Patent number: 5956088
    Abstract: A method for increasing channel utilization for a data channel transmitting a multiplex of a set of one or more encoded program streams, each program stream in being decodeable by a corresponding decoder, each corresponding decoder including a corresponding decoder buffer, the decoder buffers having a maximum allowable size, the method comprising selecting encoded pictures to be modified, said selecting according to a criterion which includes preventing any underflow of any decoder buffer, modifying each said selected encoded picture to form a corresponding modified encoded picture, said modified encoded picture having less data than said selected encoded picture, and transmitting the corresponding modified encoded pictures through the channel in place of the selected encoded pictures.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: September 21, 1999
    Assignee: Imedia Corporation
    Inventors: Paul Shen, Efraim Arazi, Edward A. Krause, Adam S. Tom
  • Patent number: 5949948
    Abstract: A compressed video playback system which eliminates playback mode transition artifacts. Transitions between various playback modes are effected in such a manner that transition artifacts are eliminated by delaying playback mode transitions until appropriate frames of data are detected for propagation to the compressed video decoder. In addition, compressed video data retrieval methods are improved for supporting multi-speed playback modes in both forward and reverse directions in an optimal manner.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: September 7, 1999
    Assignee: Imedia Corporation
    Inventors: Edward A. Krause, Paul Shen, Adam S. Tom
  • Patent number: 5926205
    Abstract: Selective video-on-demand access is provided to a virtually unlimited number of subscribers by partitioning the video program into an ordered sequence of N segments and providing the subscribers concurrent access to each of the N segments. A data stream representative of the video program is partitioned into N subsequences, each representative of one of the N segments. The data of each of the N subsequences is organized as an ordered sequence of elements. The elements of each of the N subsequences are interleaved and the interleaved data stream is continuously transmitted over a video program distribution medium at a rate which renders the data representing each segment concurrently available to any subscriber having a receiver capable of selecting, assembling, and displaying the data of a particular segment.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: July 20, 1999
    Assignee: Imedia Corporation
    Inventors: Edward A. Krause, Paul Shen, Adam S. Tom
  • Patent number: 5877812
    Abstract: A method and apparatus for reducing the size of data rate fluctuations that occur in forming a multiplex of a set of program streams, each program stream in said set being decodeable by a corresponding decoder, each corresponding decoder including a corresponding decoder buffer, said decoder buffers having a maximum allowable size, said method comprising varying the formation of the different program streams in said set to minimize the memory requirement of the decoder buffers. In one embodiment, for the case of the streams being segments of a program, varying includes varying the segment length. In another embodiment, varying includes adjusting the relative alignment of the program streams. Different embodiments of adjusting include inserting program material such as a pause at selected points in time, causing decoder buffers to underflow at selected points in time, and varying the rate of decoding and display at selected points in time.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: March 2, 1999
    Assignee: Imedia Corporation
    Inventors: Edward A. Krause, Adam S. Tom, Paul Shen
  • Patent number: 5862140
    Abstract: A method and apparatus multiplexing several encoded program streams into a single multiplex suitable for transmission over a data channel, the streams typically including video and audio. According to one embodiment of the invention, high data channel utilization is achieved by determining the order of sending data packets of program streams into the data channel. According to this embodiment, whenever data is to be sent into the data channel, a determination is made of which packet to send or append to the multiplex, said determination by selecting a channel that has a decoder buffer that is not approaching a full state, and said next packet is appended to said multiplex. The method further includes selecting a channel that substantially balances the decoder buffers of the decoders with which the program streams are decodeable.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: January 19, 1999
    Assignee: Imedia Corporation
    Inventors: Paul Shen, Edward A. Krause, Adam S. Tom
  • Patent number: 5612742
    Abstract: Virtually random and on-demand access is provided to a virtually unlimited number of subscribers by partitioning the video program into an ordered sequence of n segments and providing the subscribers concurrent access to each of the n subsequences. A data stream representative of the video program is partitioned into n subsequences, each representative of one of the n segments. The data of each of the n subsequences is organized as an ordered sequence of elements. The elements of each of the n subsequences are interleaved and the interleaved data stream is continuously transmitted over a video program distribution medium at a rate which renders the data representing each segment concurrently available to any subscriber having a receiver capable of selecting, assembling, and displaying the data of a particular segment. The data stream can be compressed prior to interleaving using one of many known video data compression standards and techniques.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: March 18, 1997
    Assignee: Imedia Corporation
    Inventors: Edward A. Krause, Paul Shen, Adam S. Tom
  • Patent number: 5311546
    Abstract: A method and apparatus are provided for adaptively equalizing data signals in a communications receiver. An unequalized data signal is demodulated. The demodulated data signal is filtered in an adaptive equalizer that initially updates adaptive filter coefficients using error signals derived from a first algorithm. A carrier lock signal is generated when a phase error of a filtered signal output from the adaptive equalizer reaches a threshold value. The adaptive filter coefficients are updated using error signals derived from a second algorithm instead of the first algorithm in response to the carrier lock signal. The first algorithm is a self-recovering equalization algorithm such as the Constant Modulus Algorithm. The second algorithm can be a decision directed algorithm. Carrier phase is recovered without the use of a phase rotator or phase de-rotator, by locating the adaptive equalizer inside of the carrier recovery loop.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: May 10, 1994
    Assignee: General Instrument Corporation
    Inventors: Woo H. Paik, Scott A. Lery, Adam S. Tom