公开(公告)号：US10045033B2

公开(公告)日：2018-08-07

申请号：US14888976

申请日：2014-04-22

Applicant: NEC Corporation

Inventor： Kenta Tokumitsu ,  Keiichi Chono ,  Eita Kobayashi

IPC: H04N19/18 ,  H04N19/70 ,  H04N19/96 ,  H04N19/124 ,  H04N19/91 ,  H04N19/14 ,  H04N19/146 ,  H04N19/147 ,  H04N19/64

Abstract: A quantization unit for quantizing orthogonal transform coefficients to calculate a coefficient level: calculates the number of value information bits of a significant coefficient level of an orthogonal transform coefficient to be processed in an image block; monitors coefficient levels output from the quantization unit in the image block from beginning to the N-th prior to the target in transmission order, and updates a state variable indicating whether or not at least one of monitored coefficient levels is significant; calculates the number of position information bits of the significant coefficient level of the orthogonal transform coefficient to be processed, based on a position of the orthogonal transform coefficient to be processed and the state variable; and sets the significant coefficient level to 0 in the case where the number of value information bits and the number of position information bits satisfy a predetermined condition.

公开(公告)号：US20240187579A1

公开(公告)日：2024-06-06

申请号：US18281872

申请日：2022-01-20

Applicant: NEC Corporation

Inventor： Kenta Tokumitsu ,  Keiichi Chono ,  Tomonori Yanagita

IPC: H04N19/117 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82

Abstract: In order to achieve improved compression efficiency while controlling implementation costs, an adaptive loop filter includes an acquisition unit configured to acquire statistical information on a picture to be coded, an allocation unit configured to allocate a single filter set common to a plurality of blocks included in the picture, based on the statistical information on the picture, and a filter processing unit configured to execute adaptive loop filter processing on each of the plurality of blocks, by using the single filter set.

公开(公告)号：US10003804B2

公开(公告)日：2018-06-19

申请号：US14651466

申请日：2013-12-03

Applicant: NEC Corporation

Inventor： Kenta Tokumitsu ,  Keiichi Chono

IPC: H04N19/126 ,  H04N19/65 ,  H04N19/91 ,  H04N19/149 ,  H04N19/13 ,  H04N19/132 ,  H04N19/18 ,  H04N19/147 ,  H04N19/15 ,  H04N19/124

CPC classification number: H04N19/126 ,  H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/147 ,  H04N19/149 ,  H04N19/15 ,  H04N19/18 ,  H04N19/65 ,  H04N19/91

Abstract: The quantization unit calculates the number of bits of location information determined based on the location of a coefficient level to be significant first in order of transmission and included in the image block, calculates the number of value information bits of a coefficient level to be significant, and sets a coefficient level to be significant in which the number of location information bits and the number of value information bits meet a predetermined condition to 0.