专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2020211807A1 MATRIX DERIVATION IN INTRA CODING MODE 审中-公开
公开(公告)号：WO2020211807A1
公开(公告)日：2020-10-22
申请号：PCT/CN2020/085050
申请日：2020-04-16
申请人： BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD. , BYTEDANCE INC.
发明人： DENG, Zhipin , ZHANG, Kai , ZHANG, Li , LIU, Hongbin , XU, Jizheng
IPC分类号： H04N19/11 , H04N19/48
摘要： Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes performing a conversion between a current video block of a video and a bitstream representation of the current video block according to a rule, where the rule specifies a relationship between samples of the current video block and matrices or offset values applied in a matrix weighted intra prediction (MIP) mode during the conversion, and where the MIP mode includes determining a prediction block of the current video block by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation.

2. 发明申请

WO2020139414A1 VIDEO STREAM ADAPTIVE FILTERING FOR BITRATE REDUCTION 审中-公开
公开(公告)号：WO2020139414A1
公开(公告)日：2020-07-02
申请号：PCT/US2019/029088
申请日：2019-04-25
申请人： GOOGLE LLC
发明人： IZADI, Mohammad , ADSUMILLI, Balineedu
IPC分类号： H04N19/117 , H04N19/147 , H04N19/192 , H04N19/19 , H04N19/194 , H04N19/48 , H04N19/85
摘要： Adaptive filtering is used video stream for bitrate reduction. A first copy of the input video stream is encoded to a reference bitstream. Each of a number of candidate filters is applied to each frame of a second copy of the input video stream to produce a filtered second copy of the input video stream. The filtered second copy is encoded to a candidate bitstream. A cost value for the candidate filter is determined based on distortion value and bitrate differences between the candidate bitstream and the reference bitstream. The candidate bitstream corresponding to the candidate filter with a lowest one of the cost values is selected as the output bitstream, which is then output or stored. Processing the input video stream using the adaptive filter and before the encoding may result in bitrate reduction, thereby improving compression, decompression, and other performance.

3. 发明申请

WO2019172799A1 METHOD AND APPARATUS FOR DETECTING BLOCKS SUITABLE FOR MULTIPLE SIGN BIT HIDING 审中-公开
公开(公告)号：WO2019172799A1
公开(公告)日：2019-09-12
申请号：PCT/RU2018/000143
申请日：2018-03-07
申请人： HUAWEI TECHNOLOGIES CO., LTD , FILIPPOV, Alexey Konstantinovich
发明人： FILIPPOV, Alexey Konstantinovich , RUFITSKIY, Vasily Alexeevich
IPC分类号： H04N19/129 , H04N19/61 , H04N19/18 , H04N19/48 , H04N19/467
摘要： The present disclosure relates to provision of a mechanism for deciding whether and/or for which set of transformation coefficients resulting from a transformation of some source signal a sign of a current transformation coefficient may be embedded into a value of a function of that set of transformation coefficients. In particular, the decision is based on a condition including evaluating a second function of the transform coefficient values in the set of transform coefficients and a number of those transform coefficients in the set which are larger than a coefficient value threshold. The corresponding decoder for is also provided.

4. 发明申请

WO2019166317A1 A SPECTRALLY ADAPTIVE NOISE FILLING TOOL (SANFT) FOR PERCEPTUAL TRANSFORM CODING OF STILL AND MOVING IMAGES 审中-公开
公开(公告)号：WO2019166317A1
公开(公告)日：2019-09-06
申请号：PCT/EP2019/054312
申请日：2019-02-21
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： HELMRICH, Christian , KEYDEL, Paul , BOSSE, Sebastian
IPC分类号： H04N19/48 , H04N19/46 , H04N19/625 , H04N19/86
摘要： Examples are provided for apparatus and methods for video encoding and decoding. An encoder apparatus (210) for encoding a picture into a data stream (219) is configured to: - subject (216) a transform (T) of a block of the picture to quantization to obtain a quantized transform (T Q ); - determine (302) a zero-quantized portion (N Q ) of the quantized transform (T Q ); - determine (304) at least one noise parameter (222, I, l Q , g, g Q , TCorr) providing noise information on the transform (T) within the zero-quantized portion (N Q ); - signal the quantized transform (T Q ) and the at least one parameter. A decoder apparatus (230, 400) for decoding a picture from a data stream (219) is configured to: - derive a quantized transform (T Q ) from the data stream, a zero-quantized portion (N Q ) of the quantized transform (T Q ), and at least one noise parameter (222, l Q , g Q , TCorr) providing noise information for the zero-quantized portion (N Q ); - provide noise synthesis (408, 422) to synthesize noise associated with the quantized transform (T Q ) on the basis of the at least one noise parameter (222); and - reconstruct (412) the picture using the quantized transform and the synthesized noise. An apparatus for generating noise, configured to: - pseudo-randomly generate (502) a first sequence of pseudo-random values (503) on the basis of a first seed, the first sequence being reset at a first reset frequency; - pseudo-randomly generate (504) a second sequence of pseudo-random values (505) on the basis of a second seed, the second sequence being reset at a second reset frequency greater than the first reset frequency; - combine (506) one of the pseudo-random values (503) of the first sequence with one of the pseudo-random values (505) of the second sequence; and - synthesize noise on the basis of the combination.

5. 发明申请

WO2019100108A1 IMAGE COMPRESSION FOR DIGITAL REALITY 审中-公开
公开(公告)号：WO2019100108A1
公开(公告)日：2019-05-31
申请号：PCT/AU2018/051237
申请日：2018-11-20
申请人： IMMERSIVE ROBOTICS PTY LTD
发明人： FITZGERALD, Daniel Liam , LUCAS, Timothy Simon , LAMB, Rodney Ian
IPC分类号： H04N19/40 , H04N19/48 , H04N19/85 , H04N13/161 , G06T9/00
摘要： A method of displaying images forming part of a digital reality stream, the method including, for each image to be displayed in one or more encoder processing devices, generating compressed image data by differentially compressing image data indicative of the image in accordance with system operation and the content of the digital reality stream so that different parts of the image are compressed using a different degree of compression, wirelessly transmitting the compressed image data to a display device using a wireless communications link, and, in one or more decoder processing devices associated with the display device, differentially decompressing the compressed image data to thereby generate image data indicative of the image to be displayed.

6. 发明申请

WO2019045538A1 부호화 방법 및 그 장치, 복호화 방법 및 그 장치 审中-公开
公开(公告)号：WO2019045538A1
公开(公告)日：2019-03-07
申请号：PCT/KR2018/010198
申请日：2018-09-03
申请人： 삼성전자 주식회사
发明人： 표인지
IPC分类号： H04N19/48 , H04N19/70 , H04N19/119 , H04N19/176
CPC分类号： H04N19/119 , H04N19/176 , H04N19/48 , H04N19/70
摘要： 현재 블록의 구역 플래그, 서브 구역 플래그 및 변환 계수 정보를 포함하는 비트스트림을 수신하는 단계, 현재 블록을 복수의 구역으로 분할하는 단계, 현재 블록의 복수의 구역에 대한 구역 플래그에 따라, 현재 블록의 마지막 유효 변환 계수가 복수의 구역 중 어떤 구역에 포함되어 있는지 결정하는 단계, 복수의 구역 중 적어도 하나의 유효 변환 계수가 포함될 수 있는 구역을 복수의 서브 구역으로 분할하는 단계, 현재 블록의 복수의 서브 구역에 대한 서브 구역 플래그에 따라, 복수의 서브 구역 각각에 대하여 적어도 하나의 유효 변환 계수가 포함되는지 결정하는 단계, 구역 플래그 및 서브 구역 플래그에 기초하여, 복수의 서브 구역 중 적어도 하나의 유효 변환 계수를 포함하는 서브 구역에 대한 계수 코딩 방식을 결정하는 단계, 및 계수 코딩 방식에 따라 현재 블록의 변환 계수 정보를 파싱함으로써, 현재 블록의 변환 계수 배열을 획득하는 단계를 포함하는 비디오 복호화 방법이 제공된다.

7. 发明申请

WO2018229462A1 METHOD AND SYSTEM FOR SCALING DISPLAY DATA USING AN INVERSE TRANSFORM DECODER 审中-公开
公开(公告)号：WO2018229462A1
公开(公告)日：2018-12-20
申请号：PCT/GB2018/051566
申请日：2018-06-08
申请人： DISPLAYLINK (UK) LIMITED
发明人： COOPER, Patrick David
IPC分类号： G09G5/00 , H04N21/41 , H04N21/4402 , H04N21/4363 , H04N19/119 , H04N19/63 , H04N19/48 , H04N19/44 , H04N19/59 , H04N19/88 , G06T3/40
CPC分类号： H04N21/4122 , G06F3/14 , G06T3/4084 , G09G5/006 , G09G2340/02 , G09G2340/04 , H04N19/119 , H04N19/44 , H04N19/48 , H04N19/59 , H04N19/63 , H04N21/43632 , H04N21/440263
摘要： A display system for displaying display data includes a host device (11), which generates at least a portion of a frame of display data to be displayed on a remote display (13). The host device (11) compresses the display data by determining a scaling factor, determining a number of encoding passes being less than a predetermined number of decoding passes by a number x based on the scaling factor, and performing the number of encoding passes using a transform, each encoding pass producing a set of display coefficients, which are then quantised and rounded to produce encoded display data. A display control device (12) decodes the encoded display data using a hardware decoder by performing the predetermined number of decoding passes of an inverse transform, the predetermined number of decoding passes being at least two, such that the predetermined number of decoding passes is the number of encoding passes plus the number x additional decoding passes, and wherein the decoding uses display coefficients having a zero value for each additional decoding pass.

8. 发明申请

WO2018041892A1 METHOD AND APPARATUS FOR DETERMINING THE PERCEPTUAL VIDEO QUALITY OF A CHUNK OF MULTIMEDIA CONTENT 审中-公开
标题翻译：用于确定多媒体内容块的知觉视频质量的方法和设备
公开(公告)号：WO2018041892A1
公开(公告)日：2018-03-08
申请号：PCT/EP2017/071759
申请日：2017-08-30
申请人： DEUTSCHE TELEKOM AG , TECHNISCHE UNIVERSITÄT BERLIN , TECHNISCHE UNIVERSITÄT ILMENAU
发明人： GARCIA, Marie-Neige , ROBITZA, Werner , RAAKE, Alexander , LIST, Peter , FEITEN, Bernhard , WÜSTENHAGEN, Ulf
IPC分类号： H04N19/48 , H04N17/00 , H04N19/85
摘要： The present invention relates to a method and an apparatus for determining the perceptual video quality of a chunk of multimedia content to be transmitted from a server to a client as well as a corresponding computer program product. The method comprises the step of: determining the quantization degradation Dq of the video content of the multimedia content using at least one set of input parameters, wherein the at least one set of input parameters for the estimation of the quantization degradation Dq is selected considering at least one computational resource of a device on which the method is to be carried out and/or considering at least one available resource of the multimedia content.
摘要翻译：本发明涉及用于确定要从服务器向客户机发送的多媒体内容块的感知视频质量的方法和装置以及相应的计算机程序产品。该方法包括以下步骤：使用至少一组输入参数来确定多媒体内容的视频内容的量化劣化Dq，其中用于估计量化劣化Dq的至少一组输入参数是在在其上执行该方法的设备的至少一个计算资源和/或考虑多媒体内容的至少一个可用资源。

9. 发明申请

WO2016135510A1 IMAGE DATA COMPRESSION AND DECOMPRESSION USING MINIMIZE SIZE MATRIX ALGORITHM 审中-公开
标题翻译：使用最小尺寸矩阵算法的图像数据压缩和分解
公开(公告)号：WO2016135510A1
公开(公告)日：2016-09-01
申请号：PCT/GB2016/050512
申请日：2016-02-26
申请人： SHEFFIELD HALLAM UNIVERSITY , RODRIGUES, Marcos , SIDDEQ, Mohammed
发明人： RODRIGUES, Marcos
IPC分类号： H04N19/18 , H04N19/48
CPC分类号： H04N19/18 , H04N19/48
摘要： Computer implemented methods of compressing and decompressing image data are described. A discrete cosine (DCT) transformation is applied to each of a plurality of pixel blocks to generate a set of DCT coefficients for each pixel block comprising a DC DCT coefficient and a plurality of AC DCT coefficients. Each set of DCT coefficients is quantised. A DC array is formed from the set of quantised DC DCT coefficients and an AC matrix is formed from the set of quantised AC DCT coefficients. The AC matrix is compressed by eliminating blocks of data having only zero values and forming a reduced AC array from blocks including non-zero values. The reduced AC array is compressed using a key to form a coded AC array. The DC array and coded AC array are arithmetically coded to form arithmetically coded data which is included in a compressed image file. The decompression method is essentially the reverse process.
摘要翻译：描述了计算机实现的压缩和解压缩图像数据的方法。离散余弦（DCT）变换被应用于多个像素块中的每一个以产生包括DC DCT系数和多个AC DCT系数的每个像素块的DCT系数集合。对每组DCT系数进行量化。由该组量化的DC DCT系数形成DC阵列，并从该组量化的AC DCT系数形成AC矩阵。通过消除仅具有零值的数据块并且从包括非零值的块形成减小的AC阵列来压缩AC矩阵。减少的AC阵列使用键压缩以形成编码的AC阵列。 DC阵列和编码的AC阵列被算术编码，以形成包含在压缩图像文件中的算术编码数据。减压方法本质上是相反的过程。

10. 发明申请

WO2016026526A3 VIDEO COMPOSITION 审中-公开
标题翻译：视频组成
公开(公告)号：WO2016026526A3
公开(公告)日：2016-07-14
申请号：PCT/EP2014067757
申请日：2014-08-20
申请人： FRAUNHOFER GES ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E V
发明人： SANCHEZ DE LA FUENTE YAGO , SKUPIN ROBERT , SCHIERL THOMAS
IPC分类号： H04N19/48 , H04N19/40 , H04N19/50 , H04N21/44 , H04N21/85
CPC分类号： H04N19/40 , H04N19/105 , H04N19/13 , H04N19/159 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/177 , H04N19/31 , H04N19/436 , H04N19/48 , H04N19/51 , H04N19/61 , H04N19/70 , H04N21/4312 , H04N21/816
摘要： Video composition is performed by filling a portion of the composed video data steam by collecting and copying, and another portion added synthetically by referencing, via motion-compensated temporal prediction, the other portion of the composed video data stream, obtained by collecting and copying.
摘要翻译：通过收集和复制填充合成视频数据流的一部分来执行视频合成，并且通过经由运动补偿时间预测参考通过收集和复制获得的合成视频数据流的另一部分来合成地添加另一部分。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式