公开(公告)号：EP1116154B1

公开(公告)日：2011-08-03

申请号：EP99970187.3

申请日：1999-10-03

申请人： Parthusceva Ltd.

发明人： SADEH, Roni

IPC分类号： H04N7/30 ,  G06K1/00

CPC分类号： H04N19/12 ,  H04N19/122 ,  H04N19/14 ,  H04N19/176

摘要： The present invention is embodied in a data compression encoder (38) for use with the discrete cosine transform compression process (48). The invention enhances compression using the discrete cosine transform by utilizing a prediction engine (46) that breaks the data received into predicted and unpredicted portions. The predicted portions are excluded from the discrete cosine transform reducing the time required to compress a file. The prediction engine relies, in part, upon look-up tables that are used to determine the predicted blocks. A table build engine and database compiler are used to create the look-up tables.

公开(公告)号：EP1442392A2

公开(公告)日：2004-08-04

申请号：EP02783497.7

申请日：2002-10-29

申请人： Parthusceva Ltd.

发明人： SADEH, Yaron M.

IPC分类号： G06F17/14

CPC分类号： G06F17/141 ,  G06F17/142 ,  G06F17/147

摘要： In some embodiments of the present invention, quantized frequency coefficients of a matrix of spatial data are obtained. Blocks of frequency coefficients that will be zero-valued after quantization are identified. Only frequency coefficients belonging to other blocks are calculated explicitly using the spatial-to-frequency transform.

公开(公告)号：EP1449116A1

公开(公告)日：2004-08-25

申请号：EP02781731.1

申请日：2002-10-29

申请人： Parthusceva Ltd.

发明人： SADEH, Yaron, M.

IPC分类号： G06F17/14 ,  G06T9/00 ,  H04N7/30 ,  H04N7/26 ,  H04N7/50

CPC分类号： H04N19/635 ,  H04N19/122 ,  H04N19/1883 ,  H04N19/42 ,  H04N19/593 ,  H04N19/60 ,  H04N19/61 ,  H04N19/63

摘要： In some embodiments of the present invention, frequently occurring inverse linear transform results are calculated and stored in look-up-tables. In real time, incoming blocks of linear transform coefficients are divided into two or more groups. A numerical code is determined for each group and checked against a look-up-table for that group to see whether it corresponds to a pre-calculated inverse linear transform result.

公开(公告)号：EP1116154A4

公开(公告)日：2007-05-02

申请号：EP99970187

申请日：1999-10-03

申请人： PARTHUSCEVA LTD

发明人： SADEH RONI

IPC分类号： G06T9/00 ,  H03M7/30 ,  H04N1/41 ,  H04N7/30 ,  G06K1/00

CPC分类号： H04N19/12 ,  H04N19/122 ,  H04N19/14 ,  H04N19/176

摘要： The present invention is embodied in a data compression encoder (38) for use with the discrete cosine transform compression process (48). The invention enhances compression using the discrete cosine transform by utilizing a prediction engine (46) that breaks the data received into predicted and unpredicted portions. The predicted portions are excluded from the discrete cosine transform reducing the time required to compress a file. The prediction engine relies, in part, upon look-up tables that are used to determine the predicted blocks. A table build engine and database compiler are used to create the look-up tables.

公开(公告)号：EP1442608A2

公开(公告)日：2004-08-04

申请号：EP02781732.9

申请日：2002-10-29

申请人： Parthusceva Ltd.

发明人： SADEH, Yaron M. ,  MELAMED, Eldad

IPC分类号： H04N7/26

CPC分类号： H04N19/547 ,  H04N19/533

摘要： In some embodiments of the present invention, low frequency components for a current block in a current picture and a candidate block in a reference picture are obtained. For each of the low frequency components, quantized phase differences between the current block and the candidate block are calculated. Using the quantized phase differences as an index, coordinates of a global maximum of a correlation function corresponding to the quantized phase differences are retrieved from the table. The coordinates represent a motion vector. A refined candidate block is determined from a spatial search in the vicinity of a candidate block in the reference picture from which the motion vector originates when the motion vector terminates at the current block. The refined candidate block is selected as a reference block for the current block if a matching criterion between the refined candidate block and the current block satisfies a predetermined criterion.

公开(公告)号：EP1173006A3

公开(公告)日：2004-07-14

申请号：EP01116660.0

申请日：2001-07-13

申请人： Parthusceva Ltd.

发明人： Sadeh, Roni M.

IPC分类号： H04N1/64 ,  H04N7/30

CPC分类号： H04N19/186 ,  H04N19/60

摘要： An image compression method is provided including separating an image into a plurality of color channel sub-images processing each of the color channel sub-images by sub-sampling the sub-image transform coding the sub-sampled sub-image decoding the transform-coded image forming a plurality of square groupings of pixels in the decoded image predicting a value for a pixel within each of the x-shaped groupings determining a prediction error for each predicted pixel value within each of the square groupings coding the prediction error forming a plurality of at least partly diamond-shaped groupings of pixels in the decoded image predicting a value for a pixel within each of the diamond-shaped groupings and combining each of the processed color channel sub-images with the coded prediction errors, thereby forming a compressed image.