公开(公告)号：US09270994B2

公开(公告)日：2016-02-23

申请号：US13839850

申请日：2013-03-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Arild Fuldseth

IPC: H04N7/12 ,  G06K9/36 ,  H04N19/583 ,  H04N19/176 ,  H04N19/61 ,  H04N19/436 ,  H04N19/44

CPC classification number: H04N19/51 ,  H04N19/176 ,  H04N19/436 ,  H04N19/44 ,  H04N19/61

Abstract: A video decoder, method and computer program product allow for processing of a video frame encoded in rectangular tiles. An interface receives a bit stream in tile order within a video frame that was encoded into rectangular tiles. A processor decodes the video frame while respecting dependency breaks at tile boundaries; the rectangular tiles include an integer number of two-dimensional blocks of pixels. A tile shape is defined by N×M two-dimensional blocks of pixels, respective values of N and M need not be identical for each of the rectangular tiles, and information regarding tile shape for each tile being conveyed from an encoder to the decoder. The decoder determines N and M for each tile from the information, and tiles have dependency breaks therebetween.

Abstract translation: 视频解码器，方法和计算机程序产品允许处理以矩形瓦片编码的视频帧。 接口在编码成矩形瓦片的视频帧内以瓦片顺序接收位流。 处理器解码视频帧，同时遵循瓦片边界的依赖关系; 矩形瓦片包括整数个二维像素块。 瓦片形状由N×M个二维像素块定义，N和M的各个值对于每个矩形瓦片不需要相同，并且关于每个瓦片的瓦片形状的信息从编码器传送到解码器。 解码器根据信息为每个瓦片确定N和M，并且瓦片之间具有依赖断点。

公开(公告)号：US10171810B2

公开(公告)日：2019-01-01

申请号：US14995512

申请日：2016-01-14

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Gisle Bjontegaard

IPC: G06K9/36 ,  H03M7/00 ,  H04N7/12 ,  H04N11/02 ,  H04N19/13 ,  H04N19/103 ,  H04N19/136 ,  H04N19/18

Abstract: Video transform coefficient encoding and decoding methods are provided. A two-dimensional array of quantized transform coefficients are obtained for a block of a video frame. The two-dimensional array of quantized transform coefficients are converted to a one-dimensional array of integer samples using a scan pattern, wherein each sample is represented with a level that is an absolute value of the sample and a sign bit if the level is greater than zero. The one-dimensional array of samples is converted to a bit-stream by processing the one-dimensional array of samples in sequential order. A switch is adaptively made between multiple coding modes, where each coding mode is characterized by how consecutive coefficients are jointly coded as a single event. For each mode, a switch may be adaptively made between various variable length code (VLC) tables.

公开(公告)号：US10136155B2

公开(公告)日：2018-11-20

申请号：US15273781

申请日：2016-09-23

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Gisle Bjontegaard

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/52 ,  H04N19/172 ,  H04N19/176 ,  H04N19/105 ,  H04N19/139 ,  H04N19/577

Abstract: Techniques for direct mode video coding/decoding techniques. According to one embodiment, various blocks in B frames may use motion vectors from different reference frames (P frames or B frames), according to what is referred to herein as a patchwork motion field. Different blocks of a given frame may use motion vectors inherited from different frames for purposes of computing a predicted block for the given frame.

公开(公告)号：US09693057B2

公开(公告)日：2017-06-27

申请号：US14051020

申请日：2013-10-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Gisle Bjontegaard ,  Arild Fuldseth

IPC: H04N19/625 ,  H04N19/61 ,  H04N19/00 ,  G06F17/14

CPC classification number: H04N19/615 ,  G06F17/147 ,  H04N19/619 ,  H04N19/625

Abstract: A video coding/decoding system, method and computer program product employ an integer transform matrix for transforming to/from transform coefficients and residual pixel data in moving pictures by a set of semi-orthonormal basis vectors. The basis vectors are derived from conventional DCT or KTL matrixes, but relaxes to some extent the requirements for orthogonality, norm equality and element size limitation. In this way improved coding efficiency and lower complexity compared to previously used integer transforms are possible.

公开(公告)号：US20190037233A1

公开(公告)日：2019-01-31

申请号：US16145429

申请日：2018-09-28

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Gisle Bjontegaard

IPC: H04N19/52 ,  H04N19/577 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/105

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/577

Abstract: Techniques for direct mode video coding/decoding techniques. According to one embodiment, various blocks in B frames may use motion vectors from different reference frames (P frames or B frames), according to what is referred to herein as a patchwork motion field. Different blocks of a given frame may use motion vectors inherited from different frames for purposes of computing a predicted block for the given frame.

公开(公告)号：US20180359493A1

公开(公告)日：2018-12-13

申请号：US16105276

申请日：2018-08-20

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Steinar Midtskogen

IPC: H04N19/86

CPC classification number: H04N19/86

Abstract: A target sample x(i,j) of a two-dimensional array of reconstructed samples is filtered based on values of samples in a neighboring region of the target sample to produce a two-dimensional array of modified reconstructed samples, according to the equation: y(i,j)=round(x(i,j)+g(Σm,n∈Ra(m,n)ƒ(x(i,j)−b(m,n)x(m,n)))), where y(i,j) is a modified target sample value, R is the neighboring region of the target sample, a(m,n) and b(m,n) are real-valued coefficients, round(x) is a function that maps the value x to an integer value in the range [0,2B−1], B is the number of bits representing each sample of the two-dimensional array of modified reconstructed samples, ƒ(x) and g(x) are functions, wherein (a) ƒ(x) is a non-linear function, or (b) g(x) is a non-linear function and both a width and a height of R is more than one sample.

公开(公告)号：US10091533B2

公开(公告)日：2018-10-02

申请号：US15182765

申请日：2016-06-15

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Steinar Midtskogen

IPC: H04N19/86

Abstract: A target sample x(i,j) of a two-dimensional array of reconstructed samples is filtered based on values of samples in a neighboring region of the target sample to produce a two-dimensional array of modified reconstructed samples, according to the equation: y(i,j)=round (x(i, j)+g(Σm,n∈Ra(m, n)f(x(i,j)−b(m,n)x(m,n)))), where y(i,j) is a modified target sample value, R is the neighboring region of the target sample, a(m,n) and b(m,n) are real-valued coefficients, round(x) is a function that maps the value x to an integer value in the range [0,2B-1], B is the number of bits representing each sample of the two-dimensional array of modified reconstructed samples, f(x) and g(x) are functions, wherein (a) f(x) is a non-linear function, or (b) g(x) is a non-linear function and both a width and a height of R is more than one sample.

公开(公告)号：US20180035127A1

公开(公告)日：2018-02-01

申请号：US15273781

申请日：2016-09-23

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Gisle Bjontegaard

IPC: H04N19/52 ,  H04N19/172 ,  H04N19/176

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/577

Abstract: Techniques for direct mode video coding/decoding techniques. According to one embodiment, various blocks in B frames may use motion vectors from different reference frames (P frames or B frames), according to what is referred to herein as a patchwork motion field. Different blocks of a given frame may use motion vectors inherited from different frames for purposes of computing a predicted block for the given frame.

公开(公告)号：US20200014958A1

公开(公告)日：2020-01-09

申请号：US16576993

申请日：2019-09-20

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Steinar Midtskogen

IPC: H04N19/86

Abstract: A target sample x(i,j) of a two-dimensional array of reconstructed samples is filtered based on values of samples in a neighboring region of the target sample to produce a two-dimensional array of modified reconstructed samples, according to the equation: y(i,j)=round(x(i,j)+g(Σm,n∈Ra(m,n)ƒ(x(i,j)−b(m,n)×(m,n)))), where y(i,j) is a modified target sample value, R is the neighboring region of the target sample, a(m,n) and b(m,n) are real-valued coefficients, round(x) is a function that maps the value x to an integer value in the range [0,2B−1], B is the number of bits representing each sample of the two-dimensional array of modified reconstructed samples, ƒ(x) and g(x) are functions, wherein (a) ƒ(x) is a non-linear function, or (b) g(x) is a non-linear function and both a width and a height of R is more than one sample.

公开(公告)号：US10009620B2

公开(公告)日：2018-06-26

申请号：US15008677

申请日：2016-01-28

Applicant: Cisco Technology, Inc.

Inventor： Arild Fuldseth ,  Gisle Bjontegaard

IPC: H04N19/51 ,  H04N19/103 ,  H04N19/119 ,  H04N19/91 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/51 ,  H04N19/103 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

Abstract: A block of size N×M of a video frame can be either split into smaller blocks in n different ways (e.g. horizontal, vertical, quad, etc.), or alternatively it can be coded using one out of m different coding modes (e.g. intra, inter, bi-prediction, etc.). Since splitting into smaller sub-blocks and coding the N×M block in one of the m possible ways are mutually exclusive, there are n+m distinct possibilities for processing the block further. The n+m possible ways of processing the N×M blocks are assigned a code (e.g., a number) and coded with a codeword derived from a VLC table. This achieves efficient combined coding of split information and other block-level parameters.