Patents by Inventor Ali Tabatabai

Ali Tabatabai 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).

  • Variable length coding of header data for image compression
    Patent number: 10595033
    Abstract: An image-processing apparatus and method for variable length coding of header data for image compression, includes retrieval of an input image stored in a first storage space in a memory. The input image is partitioned into a plurality of blocks. A header section is generated comprising a sequence of header bits having a first number of bits for a first block of the plurality of blocks based on application of a sequential encoding scheme on the first block. The header section in which the sequence of header bits may indicate a coding type, a transform type, a prediction type, and a QP value selected in the sequential encoding scheme, is encoded. The selected QP value may be encoded by variable length coding to reduce the first number of bits to a second number of bits in the encoded header section.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: March 17, 2020
    Assignee: SONY CORPORATION
    Inventors: Mohammed Golam Sarwer, Ali Tabatabai
  • VIDEO CODING SYSTEM WITH LOW DELAY AND METHOD OF OPERATION THEREOF
    Publication number: 20200077082
    Abstract: A method of operation of a video coding system includes: receiving a video bitstream as a serial bitstream; extracting a video syntax from the video bitstream; extracting a low delay flag, a network abstraction layer (NAL) hypothetical reference decode (HRD) parameters present flag, and a video coding layer (VCL) HRD parameters present flag from the video syntax extracting a HRD syntax from the video bitstream based on the low delay flag, the NAL HRD parameters present flag, and the VCL HRD parameters present flag; extracting a temporal layer from the video bitstream based on the video syntax having the HRD syntax; and forming a video stream based on the temporal layer for displaying on a device.
    Type: Application
    Filed: November 5, 2019
    Publication date: March 5, 2020
    Inventors: MUNSI HAQUE, KAZUSHI SATO, ALI TABATABAI, TERUHIKO SUZUKI
  • Logical intra mode naming in HEVC video coding
    Patent number: 10567795
    Abstract: A method and apparatus of using logical mode numbers during both prediction and coding in the bit stream, such as for high efficiency video coders (HEVC). These logical intra mode numbers are sorted based on angle which as a result leads to improved coding designs with fewer and smaller look-up tables, and a small gain in coding efficiency. Furthermore, by using this type of naming, the number of most probable modes (MPMs) can be readily extended since no additional tables are required. The use of three MPMs achieves a larger gain of 0.25% and 0.31% for the AI_HE and AI_LC cases, respectively.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: February 18, 2020
    Assignee: SONY CORPORATION
    Inventors: Ehsan Maani, Ali Tabatabai, Jun Xu
  • Codeword space reduction for intra chroma mode signaling for HEVC
    Patent number: 10554987
    Abstract: Intra prediction is used in state-of-the-art video coding standards such as AVC. The intra prediction modes are coded into the bitstream. Luma and chroma components could potentially have different prediction modes. For chroma components, there are 7 different modes defined in AVC: vertical, horizontal, DC, diagonal directions, and “same as luma”. Statistics show that the “same as luma” mode is frequently used, but in AVC, this mode is encoded using more bits than other modes during entropy coding, therefore the coding efficiency is decreased. Accordingly, a modified binarization/codeword assignment for chroma intra mode signaling is able to be utilized for high efficiency video coding (HEVC), the next generation video coding standard.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: February 4, 2020
    Assignee: SONY CORPORATION
    Inventors: Ehsan Maani, Wei Liu, Lina Dong, Ali Tabatabai
  • Video coding system with low delay and method of operation thereof
    Patent number: 10542251
    Abstract: A method of operation of a video coding system includes: receiving a video bitstream as a serial bitstream; extracting a video syntax from the video bitstream; extracting a low delay flag, a network abstraction layer (NAL) hypothetical reference decode (HRD) parameters present flag, and a video coding layer (VCL) HRD parameters present flag from the video syntax extracting a HRD syntax from the video bitstream based on the low delay flag, the NAL HRD parameters present flag, and the VCL HRD parameters present flag; extracting a temporal layer from the video bitstream based on the video syntax having the HRD syntax; and forming a video stream based on the temporal layer for displaying on a device.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: January 21, 2020
    Assignee: SONY CORPORATION
    Inventors: Munsi Haque, Kazushi Sato, Ali Tabatabai, Teruhiko Suzuki
  • ENHANCEMENTS IN SAMPLE ADAPTIVE OFFSET (SAO) FOR HIGH EFFICIENCY VIDEO ENCODER (HEVC)
    Publication number: 20190349596
    Abstract: An encoder/decoder is described using enhanced signaling mechanisms SAO parameters. The various parameters are signaled in various ways according to different embodiments of the invention. In a first embodiment (embodiment A), SAO on/off is decoupled form SAO type coding, with SAO on/off flags being jointly encoded for all color components. The second embodiment (embodiment B), is similar to embodiment A, but modified for application to JCTVC-J0268. In a third embodiment separate signaling is provided for SAO on/off, SAO types BO and EO, and for BO and EO side information (classes or band position). Each of these enhanced SAO signaling mechanisms provide enhanced coding efficiency.
    Type: Application
    Filed: July 5, 2019
    Publication date: November 14, 2019
    Inventors: ALI TABATABAI, JUN XU
  • High level syntax improvement on inter-layer prediction for SHVC/MV-HEVC
    Patent number: 10419776
    Abstract: Syntax changes for SHVC/MV-HEVC coding apparatus and methods are described which improve efficiency. In a first portion, syntax of header signaling position under P or B-slice conditions are described, and a new condition to signal inter-layer prediction layer. A second portion describes use of an inter-layer reference picture set as an alternative to the first portion, and provides an arranged syntax to more efficiently signal inter-layer reference information. In a third portion, an inter-layer sample only prediction and TMVP interaction is described which reduces signaling needs for collocated references syntax.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: September 17, 2019
    Assignee: SONY CORPORATION
    Inventors: Jun Xu, Ali Tabatabai
  • JCTVC-L0227: VPS_extension with updates of profile-tier-level syntax structure
    Patent number: 10419778
    Abstract: The profile_tier_level syntax structure of a High Efficiency Video Coding (HEVC) syntax structure is updated to provide more flexibility for use in the vps_extension( ) syntax structure for use in each layer or operating point. A new flag ‘LevelPresentFlag’ is added in profile_tier_level syntax structure to support the variance of Level parameters separately from the Profile/Tier Parameter. The update to the profile_tier_level syntax structure provides flexibility in selecting profile_tier and level parameters for HEVC selections in scalable video coding, multi-view coding and 3D video coding areas.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: September 17, 2019
    Assignee: SONY CORPORATION
    Inventors: Munsi Haque, Ali Tabatabai
  • VIDEO CODING SYSTEM WITH TEMPORAL SCALABILITY AND METHOD OF OPERATION THEREOF
    Publication number: 20190273932
    Abstract: A method of operation of a video coding system includes: receiving a video bitstream; extracting a video syntax from the video bitstream; extracting a hypothetical reference decoder (HRD) fixed syntax from the video syntax; extracting a HRD variable syntax from the video syntax; extracting a temporal layer from the video bitstream based on the HRD fixed syntax and the HRD variable syntax; and forming a video stream based on the temporal layer for displaying on a device.
    Type: Application
    Filed: March 28, 2019
    Publication date: September 5, 2019
    Inventors: MUNSI HAQUE, KAZUSHI SATO, ALI TABATABAI, TERUHIKO SUZUKI
  • Region of interest scalability with SHVC
    Patent number: 10390024
    Abstract: Region of Interest (ROI) scalability with SHVC is able to be implemented where scalability is used for part of a picture but not the whole picture. Applications of ROI scalability include traffic monitoring, security monitoring and tiled streaming.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 20, 2019
    Assignee: SONY CORPORATION
    Inventors: Cheung Auyeung, Jun Xu, Ohji Nakagami, Ali Tabatabai
  • LAYER BASED HRD BUFFER MANAGEMENT FOR SCALABLE HEVC
    Publication number: 20190253726
    Abstract: The buffer management methods simplify the complexity of STD buffer management for HEVC and make is easy to implement HEVC in deployed AVC/MPEG-2 networks (as legacy re-multiplexers are able to be used for re-purposing HEVC content). The buffers for base and enhancement layers are also also be managed independently before re-assembly and this simplifies the STD model. Re-assembly is still implemented before decoding an enhanced HEVC video stream.
    Type: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Inventors: Ali Tabatabai, Kazushi Sato, Shinobu Hattori, Teruhiko Suzuki
  • Coefficient coding harmonization in HEVC
    Patent number: 10375396
    Abstract: Coefficient coding for transform units (TUs) during high efficiency video coding (HEVC), and similar standards, toward simplifying design while enhancing efficiency. Elements of the invention include coefficient coding for TUs with up-right diagonal scans being modified, and selectively applying multi-level significance map coding.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: August 6, 2019
    Assignee: SONY CORPORATION
    Inventors: Jun Xu, Ali Tabatabai
  • Extensions of motion-constrained tile sets SEI message for interactivity
    Patent number: 10368078
    Abstract: An extension to the motion-constrained tile sets SEI message provides functionality to signal all tiles are independently decodable and to signal the ROIs that may have more than one tile per ROI. With this extension, the functionality to redefine any independently decodable region-of-interest in a CVS at a coding tree unit level based on user interactivity is enabled. The extension supports the interactivity utilized in various applications such as interactive Ultra High Definition Television (UHDTV), dynamic high-quality zoom-in application, interactive on-demand, e-learning, smart surveillance and many other applications. Additionally, the temporal MCTS SEI message is able to be used by an encoder for tiled streaming to signal explicitly to the decoder that the decoder need only to display the ROI.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: July 30, 2019
    Assignee: SONY CORPORATION
    Inventors: Cheung Auyeung, Jun Xu, Ali Tabatabai
  • VIDEO CODING SYSTEM WITH TEMPORAL LAYERS AND METHOD OF OPERATION THEREOF
    Publication number: 20190215523
    Abstract: A method of operation of a video coding system includes: receiving a video bitstream; extracting a video syntax from the video bitstream; extracting a temporal layer from the video bitstream based on the video syntax; and forming a video stream based on the temporal layer for displaying on a device.
    Type: Application
    Filed: March 12, 2019
    Publication date: July 11, 2019
    Inventors: MUNSI HAQUE, KAZUSHI SATO, ALI TABATABAI, TERUHIKO SUZUKI
  • Coefficient coding harmonization in HEVC
    Patent number: 10341663
    Abstract: Coefficient coding for transform units (TUs) during high efficiency video coding (HEVC), and similar standards, toward simplifying design while enhancing efficiency. Elements of the invention include coefficient coding for TUs with up-right diagonal scans being modified, and selectively applying multi-level significance map coding.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: July 2, 2019
    Assignee: SONY CORPORATION
    Inventors: Jun Xu, Ali Tabatabai
  • Video coding system with temporal layers and method of operation thereof
    Patent number: 10327005
    Abstract: An encoding apparatus of a video coding system includes a setting unit and an encoder which is connected to the setting unit. The setting unit sets video usability information (VUI) parameter including field_seq_flag. The field_seq_flag indicates whether a video stream includes a video representing field and common to all occurrences of a temporal layer. The encoder encodes the video stream based on the temporal layer to generate an encoding bitstream including the VUI set by the setting unit.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: June 18, 2019
    Assignee: SONY CORPORATION
    Inventors: Munsi Haque, Kazushi Sato, Ali Tabatabai, Teruhiko Suzuki
  • STRONG INTRA SMOOTHING FOR IN REXT
    Publication number: 20190149848
    Abstract: Based on conditions or restrictions, Strong Intra Smoothing (SIS) is enabled or disabled. SIS is not allowed for chroma when the chroma format is 444, and SIS is not allowed for chroma when the chroma format is 422 or 444.
    Type: Application
    Filed: January 14, 2019
    Publication date: May 16, 2019
    Inventors: Jun XU, Ali Tabatabai, Ohji Nakagami, Teruhiko Suzuki
  • Coefficient coding harmonization in HEVC
    Patent number: 10291914
    Abstract: Coefficient coding for transform units (TUs) during high efficiency video coding (HEVC), and similar standards, toward simplifying design while enhancing efficiency. Elements of the invention include coefficient coding for TUs with up-right diagonal scans being modified, and selectively applying multi-level significance map coding.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: May 14, 2019
    Assignee: SONY CORPORATION
    Inventors: Jun Xu, Ali Tabatabai
  • PALETTE CODING FOR COLOR COMPRESSION OF POINT CLOUDS
    Publication number: 20190114805
    Abstract: A method of compression of the color data of point clouds is described herein. A palette of colors that best represent the colors existing in the cloud is generated. Clustering is utilized for generating the palette. Once the palette is generated, an index to the palette is found for each point in the cloud. The indexes are coded using an entropy coder afterwards. A decoding process is then able to be used to reconstruct the point clouds.
    Type: Application
    Filed: August 21, 2018
    Publication date: April 18, 2019
    Inventors: Arash Vosoughi, Ali Tabatabai
  • COLOR LEAKING SUPPRESSION IN ANCHOR POINT CLOUD COMPRESSION
    Publication number: 20190114809
    Abstract: The color coding approach adopted by the Anchor Point Cloud Compression (PCC) leads to a significant color distortion, even at very low compression ratios. This color distortion is also referred to as color leaking Two approaches are able to mitigate the color leaking Both approaches reduce the color leaking significantly, while one of them (e.g., 1D subsampling) is more robust and preferred in most cases. A more general approach is an adaptive selection between these two approaches.
    Type: Application
    Filed: August 21, 2018
    Publication date: April 18, 2019
    Inventors: Arash Vosoughi, Ali Tabatabai