Patents by Inventor Ananth Sankar

Ananth Sankar 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: 7692612
    Abstract: In visual display devices such as LCD devices with backlight illumination, the backlight typically consumes most of device battery power. In the interest of displaying a given pixel pattern at a minimized backlight level, the pattern can be transformed while maintaining image quality, with a transform determined from pixel luminance statistics. Aside from, or in addition to such minimizing, a transform also can be used for image enhancement, for a displayed image better to meet a visual perception quality. In either case, the transform preferably is constrained for enforcing one or several display attributes.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: April 6, 2010
    Assignee: Moxair, Inc.
    Inventors: Ananth Sankar, David Romacho Rosell, Anurag Bist, Praveen Dua, Sriram Sundararajan
  • Patent number: 7280963
    Abstract: A computerized method is provided for generating pronunciations for words and storing the pronunciations in a pronunciation dictionary. The method includes graphing sets of initial pronunciations; thereafter in an ASR subsystem determining a highest-scoring set of initial pronunciations; generating sets of alternate pronunciations, wherein each set of alternate pronunciations includes the highest-scoring set of initial pronunciations with a lowest-probability phone of the highest-scoring initial pronunciation substituted with a unique-substitute phone; graphing the sets of alternate pronunciations; determining in the ASR subsystem a highest-scoring set of alternate pronunciations; and adding to a pronunciation dictionary the highest-scoring set of alternate pronunciations.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: October 9, 2007
    Assignee: Nuance Communications, Inc.
    Inventors: Francoise Beaufays, Ananth Sankar, Mitchel Weintraub, Shaun Williams
  • Patent number: 7266495
    Abstract: A computerized pronunciation system is provided for generating pronunciations for words and storing the pronunciations in a pronunciation dictionary. The system includes a word list including at least one word; transcribed acoustic data including at least one waveform for the word and transcribed text associated with the waveform; a pronunciation-learning module configured to accept as input the word list and the transcribed acoustic data, the pronunciation-learning module including: sets of initial pronunciations of the word, a scoring module configured score pronunciations and to generate phone probabilities, and a set of alternate pronunciations of the word, wherein the set of alternate pronunciations include a highest-scoring set of initial pronunciations with a highest-scoring substitute phone substituted for a lowest-probability phone; and a pronunciation dictionary configured to receive the highest-scoring set of initial pronunciations and the set of alternate pronunciations.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: September 4, 2007
    Assignee: Nuance Communications, Inc.
    Inventors: Francoise Beaufays, Ananth Sankar, Mitchel Weintraub, Shaun Williams
  • Publication number: 20070182757
    Abstract: In visual display devices such as LCD devices with backlight illumination, the backlight typically consumes most of device battery power. In the interest of displaying a given pixel pattern at a minimized backlight level, the pattern can be transformed while maintaining image quality, with a transform determined from pixel luminance statistics. Aside from, or in addition to such minimizing, a transform also can be used for image enhancement, for a displayed image better to meet a visual perception quality. In either case, the transform preferably is constrained for enforcing one or several display attributes.
    Type: Application
    Filed: June 20, 2006
    Publication date: August 9, 2007
    Inventors: Ananth Sankar, David Romacho Rosell, Anurag Bist, Praveen Dua, Sriram Sundararajan
  • Publication number: 20070183678
    Abstract: In visual display devices such as LCD devices with backlight illumination, the backlight typically consumes most of device battery power. In the interest of displaying a given pixel pattern at a minimized backlight level, the pattern can be transformed while maintaining image quality, with a transform determined from pixel luminance statistics. Aside from, or in addition to being used for such minimizing, a transform also can be used for image enhancement, for a displayed image better to meet a visual perception quality. In either case, the transform preferably is constrained for enforcing one or several display attributes. In a network setting, the technique can be implemented in distributed fashion, so that subtasks of the technique are performed by different, interconnected processors such as server, client and proxy processors.
    Type: Application
    Filed: July 31, 2006
    Publication date: August 9, 2007
    Inventors: Ananth Sankar, David Romacho Rosell, Anurag Bist
  • Patent number: 6725195
    Abstract: Probabilistic recognition using clusters and simple probability functions provides improved performance by employing a limited number of clusters each using a relatively large number of simple probability functions. The simple probability functions for each of the limited number of state clusters are greater in number than the limited number of state clusters.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: April 20, 2004
    Assignee: SRI International
    Inventors: Ananth Sankar, Venkata Ramana Rao Gadde
  • Publication number: 20030040906
    Abstract: Probabilistic recognition using clusters and simple probability functions provides improved performance by employing a limited number of clusters each using a relatively large number of simple probability functions.
    Type: Application
    Filed: October 22, 2001
    Publication date: February 27, 2003
    Applicant: SRI International
    Inventors: Ananth Sankar, Venkata Ramana Rao Gadde
  • Patent number: 5727124
    Abstract: Disclosed is a method for drastically reducing the average error rate for signals under mismatched conditions. The method takes a signal (e.g., speech signal) and a set of stored representations (e.g., stored representations of keywords) and performs at least one transformation that results in the signal more closely emulating the stored representations. This is accomplished by using one of three techniques. First, one may transform the signal so that the signal may be better approximated by (e.g., is closer to) one of the stored representations. Second, one may transform the set of stored representations so that one of the stored representations better approximates the signal. Third, one may transform both the signal and the set of stored representations.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: March 10, 1998
    Assignee: Lucent Technologies, Inc.
    Inventors: Chin-Hui Lee, Ananth Sankar
  • Patent number: 5634087
    Abstract: An apparatus and methods characterized by an electric neural network including a node having multipliers respectively receiving signals representing feature vector elements and signals representing weight vector elements to produce product signals, a summer to add the product signals with a bias signal and output a sum signal to a hard limiter, the hard limiter for outputting a preliminary output signal of polarity. In response to the output signal of polarity, one of at least two logic branches is enabled. In response to such enabling, weight elements are assigned to a next weight vector to be used in subsequent processing by the one of the at least two logic branches until a label is to be produced.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: May 27, 1997
    Assignee: Rutgers University
    Inventors: Richard J. Mammone, Ananth Sankar, Kevin R. Farrell