Patents by Inventor Venugopal Srinivasan

Venugopal Srinivasan 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: 10242270
    Abstract: Methods and apparatus to determine a blob people count in images are disclosed. An example method includes forming blobs based on whitened pixels of detected face rectangles in pairs of frames of a plurality of image frame captured over a period of time. The method further calculates locations of the centers of the blobs in each frame of the first one of the pairs of frames. The method further eliminates blobs in a first frame of the first one of the pairs of frames having locations within one or more blobs in the second frame of the first one of the pairs of frames. The method further adds the number of remaining blobs from the first frame to the number of blobs in the second frame of the first one of the pairs of frames to form a blob people count.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: March 26, 2019
    Assignee: The Nielsen Company (US), LLC
    Inventors: Venugopal Srinivasan, Padmanabhan Soundararajan
  • Patent number: 10236005
    Abstract: A method for generating a signature is disclosed. As part of the method, a first number of bits are identified in respective rows of an audio signature matrix that are determined to be the strongest bits in the row, bits of the audio signature matrix are replaced with respective cells having values depending on whether the respective bits are included in the first number of bits, a set of uniformly distributed numbers are generated within a range of numbered locations corresponding to cells of the audio signature matrix; numerical distances are determined, from respective numbers in the set of uniformly distributed numbers, to the numbered locations of the matrix, associated with nearest occurrences of a first value. A set of integers is generated based on the distances.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: March 19, 2019
    Assignee: THE NIELSEN COMPANY (US), LLC
    Inventors: Venugopal Srinivasan, Alexander Topchy, Sadhana Gupta
  • Publication number: 20190082219
    Abstract: An example apparatus includes means for querying a first table to perform a first query of the first table using a hash corresponding to a first site signature, the first table including hash keys corresponding to respective reference signatures, the first query to obtain, from the first table, first qualifier data descriptive of a first reference signature corresponding to a first hash key; means for querying a second table to perform a second query of the second table, the second query to obtain a plurality of blocks of reference signatures; means for comparing a first block of site signatures with the plurality of blocks of reference signatures, the first block of site signatures to include the first site signature; and means for crediting media as corresponding to reference media represented by the first reference signature when the first block of site signatures matches the plurality of blocks of reference signatures.
    Type: Application
    Filed: November 12, 2018
    Publication date: March 14, 2019
    Inventors: Daniel Nelson, Venugopal Srinivasan, Arun Ramaswamy, Raghuram Ranganathan, Kenneth William McArthur
  • Publication number: 20190074021
    Abstract: Example methods and apparatus to audio watermarking and watermark detection and extraction are disclosed herein. Example methods disclosed herein include determining a first watermark symbol encoded in encoded audio samples and storing the first watermark symbol in tangible memory. Disclosed example methods also include determining a second watermark symbol encoded in the encoded audio samples and storing the second watermark symbol in the tangible memory. Disclosed example methods further include, in response to determining that the first watermark symbol matches the second watermark symbol, outputting the first watermark symbol.
    Type: Application
    Filed: November 6, 2018
    Publication date: March 7, 2019
    Inventors: Venugopal Srinivasan, Alexander Pavlovich Topchy
  • Patent number: 10225031
    Abstract: Methods and apparatus for determining increasing robustness of media signatures are disclosed. An example apparatus includes a characteristic analyzer to analyze a media signal based on a signature algorithm to identify a comparison between a first characteristic and a second characteristic that does not satisfy a threshold; and a characteristic enhancer to adjust at least one of the first characteristic or the second characteristic to satisfy the threshold.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: March 5, 2019
    Assignee: The Nielsen Company (US)
    Inventors: Alexander Topchy, Venugopal Srinivasan
  • Publication number: 20190052930
    Abstract: Methods, apparatus, systems and articles of manufacture are disclosed for media crediting and, more particularly, methods and apparatus of media device detection for minimally invasive media meters. An example apparatus disclosed herein to detect media devices presenting media comprises a cluster generator to generate a cluster of media locations from a reference population of media locations based on media identifying information received from a presentation of media at an unidentified media device at a first media location, a media device determiner to determine media devices available at the media locations in the cluster of media locations, a cluster based media device identifier to identify the unidentified media device based on the media devices available at the media locations in the cluster of media locations, and a media device report generator to generate a report on the identity of the unidentified media device.
    Type: Application
    Filed: August 10, 2017
    Publication date: February 14, 2019
    Inventors: Alexander Topchy, Venugopal Srinivasan
  • Publication number: 20190043152
    Abstract: Example systems disclosed herein to detect watermark modifications include a watermark encoder to encode a second watermark in a sampled media signal obtained from a received broadcast signal, the sampled media signal already encoded with a first watermark that was included in the received broadcast signal. Disclosed example systems also include a watermark decoder to detect the first watermark and the second watermark in the sampled media signal, and a watermark modification evaluator to compare a first metric determined for the first watermark and a second metric determined for the second watermark to determine whether the first watermark was modified prior to being included in the received broadcast signal. Disclosed example systems further include a ratings server to revise ratings data corresponding to the received broadcast signal when the first watermark is determined to have been modified prior to being included in the received broadcast signal.
    Type: Application
    Filed: October 11, 2018
    Publication date: February 7, 2019
    Inventor: Venugopal Srinivasan
  • Patent number: 10194256
    Abstract: Methods and apparatus to analyze microphone placement for watermarks and signatures are disclosed. An example apparatus includes a signal transformer to determine a frequency spectrum of a received noise burst; a variance determiner to compute a variance of a frequency band in the frequency spectrum; and a detection rates determiner to determine a recovery rate of at least one of a watermark or a signature based on the computed variance.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: January 29, 2019
    Assignee: The Nielsen Company (US), LLC
    Inventors: Marc Messier, James Joseph Vitt, Venugopal Srinivasan, Alexander Topchy
  • Publication number: 20180358027
    Abstract: A method for generating a signature is disclosed. As part of the method, a first number of bits are identified in respective rows of an audio signature matrix that are determined to be the strongest bits in the row, bits of the audio signature matrix are replaced with respective cells having values depending on whether the respective bits are included in the first number of bits, a set of uniformly distributed numbers are generated within a range of numbered locations corresponding to cells of the audio signature matrix; numerical distances are determined, from respective numbers in the set of uniformly distributed numbers, to the numbered locations of the matrix, associated with nearest occurrences of a first value. A set of integers is generated based on the distances.
    Type: Application
    Filed: June 8, 2017
    Publication date: December 13, 2018
    Inventors: Venugopal Srinivasan, Alexander Topchy, Sadhana Gupta
  • Patent number: 10134408
    Abstract: Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. According to an example method, an identifier is encoded in media content when a different identifier has been previously encoded. According to another example method, messages decoded from media content are validated to provide improved decoding accuracy. In another example method, decoded symbols are stored in memory and synchronization symbols are located to detect a message encoded in media content.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: November 20, 2018
    Assignee: The Nielsen Company (US), LLC
    Inventors: Venugopal Srinivasan, Alexander Pavlovich Topchy
  • Patent number: 10129591
    Abstract: Methods, apparatus and articles of manufacture for signature retrieval and matching for media monitoring are disclosed. An example apparatus includes a hash table populator to store hash keys of reference signatures included in a reference signature block associated with reference media in entries of a hash table, and store qualifier data in the entry of the hash table, the qualifier data including a timestamp, an offset, and an identifier associated with the reference signature of the hash key. The apparatus further including a block table populator to store a block table key corresponding to the reference signature block in the entry of a block table, the block table key including the timestamp and the identifier, and store the reference signature block, a preceding reference signature block and a subsequent reference signature block in the first entry of the block table.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: November 13, 2018
    Assignee: The Nielsen Company (US), LLC
    Inventors: Daniel Nelson, Venugopal Srinivasan, Arun Ramaswamy, Raghuram Ranganathan, Kenneth William McArthur
  • Patent number: 10102602
    Abstract: Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to detect media watermark modifications are disclosed. Example watermark modification detection methods disclosed herein include encoding a second watermark in a media signal including a first watermark. Disclosed example methods also include detecting the first watermark and the second watermark in the media signal. Disclosed example methods further include, in response to detecting the first watermark and the second watermark, comparing a first strength metric determined for the first watermark and a second strength metric determined for the second watermark to determine whether the first watermark was modified prior to being encoded in the media signal.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: October 16, 2018
    Assignee: The Nielsen Company (US), LLC
    Inventor: Venugopal Srinivasan
  • Publication number: 20180295413
    Abstract: Example methods, apparatus and articles of manufacture to provide media content are disclosed. Example apparatus disclosed herein include means for identifying primary media content presented on a first media presentation device. Disclosed example apparatus also include means for accessing a secondary content schedule associated with the primary media content. The secondary content schedule includes a plurality of secondary content items and time values associated with the secondary content items. The secondary content items are also associated with a loyalty value for a user of the first media presentation device. Disclosed example apparatus further include means for selecting one of the secondary content items to be accessed in response to a timestamp associated with the primary media content being between time values associated with the selected one of the secondary content items in the secondary content schedule.
    Type: Application
    Filed: June 8, 2018
    Publication date: October 11, 2018
    Inventors: David Henry Harkness, Arun Ramaswamy, Jerome Samson, Jan Besehanic, Venugopal Srinivasan, Alexander Pavlovich Topchy
  • Publication number: 20180278996
    Abstract: Methods and apparatus to count people are disclosed. Example people counting apparatus disclosed herein include a difference calculator to calculate a degree of similarity between a first characteristic dataset and a second characteristic dataset representative of face detections in images. Disclosed example people counting apparatus also include a limiter to store the first characteristic dataset and the second characteristic dataset in a plurality of characteristic datasets associated when the degree of similarity does not satisfy a threshold, and to store the first characteristic dataset in the plurality of characteristic datasets and discard the second characteristic dataset when the degree of similarity satisfies the threshold to limit a number of stored characteristic datasets. Disclosed example people counting apparatus further include a comparator to compare the plurality of characteristic datasets to each other to determine a number of unique faces in an environment during a first period of time.
    Type: Application
    Filed: May 25, 2018
    Publication date: September 27, 2018
    Inventors: Padmanabhan Soundararajan, Marko Usaj, Venugopal Srinivasan
  • Publication number: 20180254048
    Abstract: Methods and apparatus to perform audio watermarking and watermark detection and extraction are disclosed. Example apparatus disclosed herein to embed a code into an audio signal include means for selecting frequency components to be used to represent the code, different sets of frequency components to represent respectively different information, respective ones of the frequency components in the sets of frequency components located in respective code bands, there being multiple code bands and spacing between adjacent code bands being equal to or less than the spacing between adjacent frequency components in the code bands. Disclosed example apparatus further include means for synthesizing the frequency components to be used to represent the code and means for combining the synthesized frequency components with an audio block of the audio signal.
    Type: Application
    Filed: May 7, 2018
    Publication date: September 6, 2018
    Inventors: Alexander Pavlovich Topchy, Arun Ramaswamy, Venugopal Srinivasan
  • Publication number: 20180226100
    Abstract: Methods, apparatus, systems and articles of manufacture to perform speed-enhanced playback of recorded media are disclosed. Example media playback devices disclosed herein include a target frames calculator to determine a target number of frames of recorded media to drop during playback of the recorded media based on a target playback rate and a total number of frames of the recorded media. Disclosed example media playback devices also include a frames selector to select a subset of the frames of the recorded media to drop during the playback of the recorded media, the frames selector to select the subset of the frames based on the target number of frames to drop and skip bytes included in the subset of frames.
    Type: Application
    Filed: April 6, 2018
    Publication date: August 9, 2018
    Inventor: Venugopal Srinivasan
  • Publication number: 20180213281
    Abstract: Methods and apparatus to determine a state of a media presentation device are disclosed. Example disclosed methods include generating a first set of weighted coefficients based on first audio received by first and second microphones at a first time. Example disclosed methods include generating a second set of weighted coefficients based on second audio received by the first and second microphones at a second time after the first time. Example disclosed methods include comparing the first set of coefficients and the second set of coefficients to generate a similarity value. Example disclosed methods include, when the similarity value satisfies a threshold, determining that the media presentation device is in a first state. Example disclosed methods include, when the similarity value does not satisfy the threshold, determining that the media presentation device is in a second state.
    Type: Application
    Filed: March 19, 2018
    Publication date: July 26, 2018
    Inventors: Venugopal Srinivasan, Morris Lee, Jeremey M. Davis
  • Publication number: 20180190301
    Abstract: Methods and apparatus for performing variable block length watermarking of media are disclosed. Disclosed example apparatus include means for selecting a first frequency from a set of frequencies based on a first symbol in a code, and for selecting a first block size based on the first symbol and the code, a combination of the first block size and the first frequency to represent the first symbol. Disclosed example apparatus also include means for synthesizing a code frequency according to the first block size and the first frequency. Disclosed example apparatus further include means for combining the code frequency with a first block of input audio samples of the audio having the first block size to form a block of encoded audio samples encoded with the first symbol, the code frequency and the first block of input audio samples to overlap in time.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 5, 2018
    Inventors: Venugopal Srinivasan, Alexander Topchy
  • Publication number: 20180176642
    Abstract: Methods, apparatus, systems and articles of manufacture to count people in an audience are disclosed. An example system includes means for transmitting a control signal to a portable device a threshold period of time after a person logs into a people meter separate from the portable device. The control signal causes the portable device to begin collecting location information and proximity information. The system also includes means for analyzing the location information to determine a location result indicative of a location of the portable device. The system further includes means for analyzing the proximity information to determine a proximity result indicative of whether the person is near the portable device. The location result and the proximity result collectively define first presence information. The first presence information indicative of whether the person is present in a media exposure environment associated with a media presentation device.
    Type: Application
    Filed: February 21, 2018
    Publication date: June 21, 2018
    Inventors: Padmanabhan Soundararajan, Venugopal Srinivasan, Alexander Topchy
  • Patent number: 10003846
    Abstract: Example methods, apparatus and articles of manufacture to provide media content are disclosed. A disclosed example method includes receiving an audio signal output by a first media presentation device, the audio signal being associated with first media content, decoding the audio signal to extract a code from the audio signal, the code identifying at least one of the first media content or a broadcaster of the first media content, setting a clock using a timestamp associated with the code, obtaining second media content based on the code and the timestamp, the second media content comprising a plurality of pieces of secondary content for respective ones of a plurality of timestamps, and presenting, at a second media presentation device, a first of the plurality of pieces of secondary media when its respective timestamp substantially corresponds to a time value obtained from the clock.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: June 19, 2018
    Assignee: The Nielsen Company (US), LLC
    Inventors: David Henry Harkness, Arun Ramaswamy, Jerome Samson, Jan Besehanic, Venugopal Srinivasan, Alexander Pavlovich Topchy