Patents by Inventor Siladitya Bhattacharya

Siladitya Bhattacharya 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: 8385427
    Abstract: A video signal can be decoded at a reduced resolution by receiving a video signal encoded at a first resolution; determining a second resolution at which the received video signal is to be decoded, wherein the second resolution is lower than the first resolution; and decoding the received video signal at the second resolution. The second resolution can be selected from a plurality of predetermined decoding resolutions. Further, the second resolution can be selected in response to an input received from a user. Decoding of the received video signal can include scaling one or more reference pictures by a first scaling factor and scaling one or more non-reference pictures by a second scaling factor. Additionally, scaling can comprise transforming a first portion of frequency coefficients associated with a block of picture information and discarding a second portion of frequency coefficients associated with the block of picture information.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: February 26, 2013
    Assignee: Apple Inc.
    Inventors: Siladitya Bhattacharya, Haitao Guo, Giovanni Agnoli
  • Patent number: 8358701
    Abstract: The decode resolution of a video signal can be varied during decoding by decoding a first portion of a video signal at a first resolution; determining a second resolution, different from the first resolution, at which a second portion of the video signal is to be decoded; adjusting one or more reference pictures associated with the video signal to correspond to the second resolution; and decoding the second portion of the video signal at the second resolution. The second resolution, at which the second portion of the video signal is decoded, can be selected from a plurality of predetermined decoding resolutions in response to the detection of a predetermined condition or in response to an input received from a user. Additionally, one or more reference pictures associated with the video signal can be up-sampled or down-sampled in at least one of the horizontal direction and the vertical direction.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: January 22, 2013
    Assignee: Apple Inc.
    Inventors: Peter Hungye Chou, Giovanni Agnoli, Haitao Guo, Siladitya Bhattacharya, Vikrant Kasarabada
  • Publication number: 20060233259
    Abstract: The decode resolution of a video signal can be varied during decoding by decoding a first portion of a video signal at a first resolution; determining a second resolution, different from the first resolution, at which a second portion of the video signal is to be decoded; adjusting one or more reference pictures associated with the video signal to correspond to the second resolution; and decoding the second portion of the video signal at the second resolution. The second resolution, at which the second portion of the video signal is decoded, can be selected from a plurality of predetermined decoding resolutions in response to the detection of a predetermined condition or in response to an input received from a user. Additionally, one or more reference pictures associated with the video signal can be up-sampled or down-sampled in at least one of the horizontal direction and the vertical direction.
    Type: Application
    Filed: April 15, 2005
    Publication date: October 19, 2006
    Inventors: Peter Chou, Giovanni Agnoli, Haitao Guo, Siladitya Bhattacharya, Vikrant Kasarabada
  • Publication number: 20060233252
    Abstract: A video signal can be decoded at a reduced resolution by receiving a video signal encoded at a first resolution; determining a second resolution at which the received video signal is to be decoded, wherein the second resolution is lower than the first resolution; and decoding the received video signal at the second resolution. The second resolution can be selected from a plurality of predetermined decoding resolutions. Further, the second resolution can be selected in response to an input received from a user. Decoding of the received video signal can include scaling one or more reference pictures by a first scaling factor and scaling one or more non-reference pictures by a second scaling factor. Additionally, scaling can comprise transforming a first portion of frequency coefficients associated with a block of picture information and discarding a second portion of frequency coefficients associated with the block of picture information.
    Type: Application
    Filed: April 15, 2005
    Publication date: October 19, 2006
    Inventors: Siladitya Bhattacharya, Haitao Guo, Giovanni Agnoli