Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Swarm64 As

Universitãt Stuttgart

Bmenu As

Thomas Richter

Christian Scherl

Herbert Thoma

Joachim Keinert

Wolfgang Heppner

Siegfried Foessel

Bilal Ahmed

Christian Minuth

Siegfried Fößel

Miguel Ángel Martínez Del Amor

Manuel De Frutos López

Nisha Bhaskar

Eivind Liland

Heiko Sparenberg

Sergej Wtjurin

Sven Simon

Yousef Baroud

Zhe Wang

Tobias Jaschke

Marcus Freisleben

Micha Nietsch

Bjørn Holte

Marco Donizelli

Giovanni Scerra

David Geier

Mahdi Najmabadi

Alfonso Martinez De La Torre

Miguel ÁNgel MARTÍNEZ Del Amor

Manuel De Frutos LÓPEZ

Mahdi M Sc Najmabadi

Zhe M Sc Wang

Yousef M Sc Baroud

Siegfried FÖSSEL

Miguel Angel MARTÍNEZ Del Amor

Liland Eivind

There is disclosed an encoder, a decoder, related methods, and non-transitory storage units storing instructions which, when executed by a computer, cause the computer to perform the methods. At an encoder (), after a spatial transformation stage (), there is obtained a spatially transformed version () of input image information () having multiple bands and, for each band, multiple transform band coefficients. After the generation of precincts (), each comprising transform coefficients covering a predetermined spatial area of the input image information (), there is provided a component transformation stage (), to apply one component transformation (CTr) selected () out of a plurality of predetermined component transformations, to each band (') of each precinct (). Hence, there is obtained a spatially transformed and color transformed version () of the input image information (), which is subsequently quantized and entropy encoded.

Encoder, decoder and related methods

An apparatus for decoding a sequence of pictures from a data stream is configured for decoding a picture of the sequence by deriving a residual transform signal of the picture from the data stream; combining a residual transform signal with a buffered transform signal approximation of a previous picture of the sequence so as to obtain a transform signal representing the picture, the transform signal having a plurality of transform coefficients; and subjecting the transform signal to a spectral-to-spatial transformation. The apparatus is configured for deriving the buffered transform signal approximation from a further transform signal representing the previous picture so that the buffered transform signal approximation has approximations of further transform coefficients of the further transform signal.

Apparatus and method for encoding and decoding a sequence of pictures using a buffered transform signal approximation

Operation method of electronic device for encoding and decoding a sequence of pictures using a buffered transform signal approximation

A concept for coding a CFA pattern image is provided, wherein, for each of the sample clusters of the CFA pattern image, having first to fourth sample positions, first to fourth color coordinates are computed, so as to provide an image representation of the CFA pattern image.

Decorrelation transform for a color filter array pattern image

An apparatus for decoding a sequence of pictures from a data stream is configured for decoding a picture of the sequence by: deriving a residual transform signal of the picture from the data stream; combining the residual transform signal with a buffered transform signal of a previous picture of the sequence so as to obtain a transform signal of the picture, the transform signal representing the picture in spectral components; and subjecting the transform signal to a spectral-to-spatial transformation, wherein the buffered transform signal comprises a selection out of spectral components representing the previous picture.

Encoding and decoding a sequence of pictures

An apparatus for decoding a sequence of pictures from a data stream is configured for decoding a picture of the sequence by deriving a residual transform signal of the picture from the data stream; combining a residual transform signal with a buffered transform signal approximation of a previous picture of the sequence so as to obtain a transform signal representing the picture, the transform signal comprising a plurality of transform coefficients; and subjecting the transform signal to a spectral-to-spatial transformation. The apparatus is configured for deriving the buffered transform signal approximation from a further transform signal representing the previous picture so that the buffered transform signal approximation comprises approximations of further transform coefficients of the further transform signal.

A coding efficiency improvement is achieved by performing bit-plane coding in a manner so that coefficient groups for which the set of coded bit-planes is predictively signaled in the datastream, are grouped in two group sets and if a signal is spent in the datastream which signals, for a group set, whether the set of coded bit-planes of all coefficient groups of the respective group set are empty, i.e. all coefficients within the respective group sets are insignificant. In accordance with another aspect, a coding efficiency improvement is achieved by providing bit-plane coding with group-set-wise insignificant signalization according to the first aspect as a coding option alternative relative to the signalization for group sets for which it is signaled that there is no coded prediction residual for the coded bit-planes for the claim groups within the respective group set.

Bit-plane encoder and decoder

Transform coefficients encoder and decoder

Concepts are presented herein how to efficiently create a suitable palette for low complexity image and video coding. A combination of the palette coding with transform coding is feasible.

Image compression technique

Transform block coding is performed very efficiently in terms of computational complexity and compression ratio, by coding the magnitude bits of the transform coefficients distributed in a matrix, in which the magnitude bits of the spectral coefficients are arranged column-wise with the spectral coefficients of the transform block ordered along a row direction of the matrix. That is, magnitude bits within a certain column of the matrix belong to a certain spectral coefficient, while magnitude bits within a certain row of the matrix belong to a certain bit plane. In this configuration, the distribution of non-zero magnitude bits may be condensed towards one corner of the matrix, corresponding to, for instance, the least significant bit plane and corresponding to, by using a scan order among the transform coefficients which sorts the transform coefficients generally in a manner from lowest to highest frequency, the lowest frequency. Various low complexity variants are presented.

Transform block coding

Bit-plane coding

The invention relates to a method for compressing an input data set, which comprises one or more input values, comprising the following steps: determining, for each input value, a tolerance range; generating encoded lossy values by a lossy encoding of the input values; generating output values associated with the input values, in particular by decoding the encoded lossy values; generating difference values by subtracting each decoded lossy value from the respectively associated input value; comparing each difference value with the respectively associated determined tolerance range; generating encoded correction values associated with the encoded lossy values on the basis of the difference values, wherein the encoded correction values are offset values, which can be added to the associated encoded lossy values; and providing an output data record as a function of a comparison of the difference values with the tolerance ranges and on the basis of the encoded lossy values and/or the encoded correction values.

Method, device, and computer program product for compressing an input data set

The invention relates to a raw image encoder for encoding a raw image of a predetermined color pattern according to which the raw image is partitioned into pixel cell blocks, each pixel cell block comprising four pixels, each pixel being associated with one of three base colors so that each pixel cell block comprises, for each of the three base colors, at least one pixel, the raw image encoder configured to subject the raw image to a color transformation to obtain a color image, by mapping, for each pixel cell block, the four pixels of the pixel cell block onto a color component quadruple forming a sample of the color image, the color component quadruple comprising three color component values of a target color space, and one pseudo color component value, and subject the color image to a multi-component picture encoding to obtain a compressed data stream.

Compression of a raw image

A memory unit and method are disclosed. The memory unit comprises: at least one controller interfaced with at least one corresponding persistent memory device operable to store files in accordance with a file system; and a file mapping unit operable, in response to a virtual file access request from a memory management unit of a processor, the virtual file access request having a virtual address within a virtual address space associated with one of the files identifying data to be accessed, to map the virtual address to a physical address of the data within the one of the files using pre-stored mapping information and to issue a physical access request having the physical address to access the data within the one of the files.

System and method for improving performance of read/write operations from a persistent memory device

A data processing apparatus, a data processing method and a computer program product are disclosed. In an embodiment, the data processing apparatus comprises: a processor comprising a plurality of parallel lanes for parallel processing of sets of threads, each lane comprising a plurality of pipelined stages, the pipelined stages of each lane being operable to process instructions from the sets of threads; and scheduling logic operable to schedule instructions for processing by the lanes, the scheduling logic being operable to identify that one of the sets of threads being processed is to be split into a plurality of sub-sets of threads and to schedule at least two of the plurality of sub-sets of threads for processing by different pipelined stages concurrently.

System and method of data processing

Growing community of inventors

Berlin, Germany

Thomas Richter