Predictive Encoding (epo) Patents (Class 375/E7.125)
  • Patent number: 10390046
    Abstract: This disclosure describes techniques for coding significant coefficient information for a video block in a transform skip mode. The transform skip mode may provide a choice of a two-dimensional transform mode, a horizontal one-dimensional transform mode, a vertical one-dimensional transform mode, or a no transform mode. In other cases, the transform skip mode may provide a choice between a two-dimensional transform mode and a no transform mode. The techniques include selecting a transform skip mode for a video block, and coding significant coefficient information for the video block using a coding procedure defined based at least in part on the selected transform skip mode. Specifically, the techniques include using different coding procedures to code one or more of a position of a last non-zero coefficient and a significance map for the video block in the transform skip mode.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: August 20, 2019
    Assignee: Qualcomm Incorporated
    Inventors: Rajan Laxman Joshi, Joel Sole Rojals, Xianglin Wang, Marta Karczewicz, Vadim Seregin
  • Patent number: 9877007
    Abstract: A method, medium, and apparatus encoding and/or decoding an image in order to increase encoding and decoding efficiency by performing binary-arithmetic coding/decoding on a binary value of a syntax element using a probability model having the same syntax element probability value for respective context index information of each of at least two image components.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: January 23, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-sung Cho, Hyun-mun Kim, Woo-shik Kim, Dmitri Birinov
  • Patent number: 9491466
    Abstract: A video coding apparatus includes a processor that executes a procedure. The procedure includes: (c) classifying each of a plurality of groups into either a full evaluation group or into a partial evaluation group; (d) determining the prediction mode to use as generating the predicted image of a coding target block by evaluating coding costs of all the prediction modes belonging to each of the groups for a group classified at (c) into the full evaluation group, and evaluating coding costs of a portion of prediction modes out of the prediction modes belonging to each of the groups for a group classified at (c) into the partial evaluation group; and (e) generating a predicted image of the coding target block using the prediction mode determined at (d).
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: November 8, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Xuying Lei, Hidenobu Miyoshi, Satoshi Shimada
  • Patent number: 8948264
    Abstract: Methods and apparatuses for efficiently coding and decoding multi-view video are provided. A method of decoding multi-view video includes: interpreting a first picture type indicating whether a current picture of the multi-view video is a reference video type for inter prediction; interpreting a block type indicating a method of determining a motion vector of a current block of the current picture; interpreting a chrominance compensation value of the current block based on at least one of the interpreted first picture type and the interpreted block type; and performing chrominance compensation on the current block by using the interpreted chrominance compensation value.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: February 3, 2015
    Assignees: Samsung Electronics Co., Ltd., Industry Academic Cooperation Foundation Kyunghee University
    Inventors: Gwang-Hoon Park, Kyu-Heon Kim, Min-Woo Park, Doug-Young Suh, Gwang-Hoon Park
  • Patent number: 8804825
    Abstract: A method for encoding pictures within a groups of pictures using prediction, where a first reference picture from a group of pictures and a second reference pictures from the subsequent group of pictures are used in predicting pictures in the group of pictures associated with the first reference picture. A plurality of anchor pictures in the group of pictures associated with the first reference picture may be predicted using both the first and second reference pictures to ensure a smooth transition between different groups of pictures within a video frame.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: August 12, 2014
    Assignee: Broadcom Corporation
    Inventors: Ashish Koul, Douglas Chin
  • Patent number: 8693543
    Abstract: Inter-frame prediction coding method, device and system are provided. The inter-frame prediction coding method includes: calculating distortions between a template area of current encoding block and each of M matching templates in L reference frames, to determine M offset vectors; acquiring M hypothesis prediction values of the encoding block to which the M matching templates correspond according to the determined M offset vectors, and calculating the template matching prediction value of the current encoding block according to the M hypothesis prediction values; comparing the template matching prediction value and original value of the current encoding block to acquire the residual of the current encoding block, and encoding the residual. The technical solution improves prediction performance of the video coding system and increases coding efficiency.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: April 8, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Steffen Kamp, Mathias Wein, Lianhuan Xiong, Yingjia Liu
  • Patent number: 8670480
    Abstract: A generated code amount accumulation part adds up the amounts of generated codes of pictures in 1 GOP which are encoded up to the current stage. An upper limit code amount accumulation part adds up the upper limit amounts of codes of the pictures in the 1 GOP which are encoded up to the current stage. A transmission load of an image transmission system is taken into consideration in the setting of the upper limit amount of codes. An update ratio setting part outputs an update instruction to lower a target rate when the accumulated amount of generated codes exceeds the accumulated upper limit amount of codes. The update ratio setting part does not output the update instruction for lowering the target rate when the accumulated amount of generated codes does not exceed the accumulated upper limit amount of codes. A transcoder can predict whether or not there is a possibility that the load of transmitting image data will increase while each picture in 1 GOP is encoded.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: March 11, 2014
    Assignee: MegaChips Corporation
    Inventors: Makoto Saito, Hiromu Hasegawa
  • Patent number: 8644380
    Abstract: A RAM_HIME used for integer pixel motion estimation by an IME stores integer pixel luminance data from a SDRAM while satisfying the conditions that improve efficiency in reading an extracted rectangular area. A RAM_HSME used for motion estimation of quarter-pixel accuracy by a SME stores partial quarter-pixel luminance data while satisfying the conditions that improve efficiency in obtaining a rectangular area after calculation by calculation. A RAM_HMEC used for chrominance data generation of quarter-pixel accuracy by a QPG stores integer pixel chrominance data from the SDRAM while satisfying the conditions that improve efficiency in obtaining rectangular areas after calculation by calculation.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: February 4, 2014
    Assignee: MegaChips Corporation
    Inventors: Kazuhiro Saito, Akira Okamoto
  • Patent number: 8537889
    Abstract: An Inverse Transform (IT) conforming to MPEG AVC I_PCM that offers better video image quality than the MPEG-2/H.263 based video decoders and real time motion picture processing at 30 frames/seconds is described. The IT module performs 4×4 Inverse Integer transform for AVC for MPEG-2 operations on a given macro block (MB) and all its sub blocks. The IT is the third module in the data flow pipeline of a video decoder, the first two being a variable length decoder (VLD) and an inverse quantizer (IQ). The IT module gets its inputs from IQ module and feeds its processed output to a Motion compensation unit/intra-prediction (MCU-IP) module, thus reconstructing the video picture.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: September 17, 2013
    Assignee: Broadcom Corporation
    Inventors: Manoj Vajhallya, R. Lakshmikanth Pai