Image encoding method, image decoding method, image encoding device, image decoding device and apparatus for encoding and decoding images

FIELD: data processing.

SUBSTANCE: invention relates to video encoding/decoding. Disclosed is a method of decoding images. Method includes a step of decoding an encoded signal, to generate quantisation coefficients and control information fragments, wherein quantisation coefficients correspond to appropriate one of transformation units, and control information fragments indicate structure of transformation units. Further, method comprises inverse quantisation and inverse transformation for each of quantisation coefficients, ultimately forming prediction error signals of corresponding transformation units. Method also includes summation of one of prediction error signals with a predication signal for each of coding units, including transformation unit, ultimately forming decoded signals for each of coding units.

EFFECT: high efficiency of decoding images.

9 cl, 60 dwg

 



 

Same patents:

FIELD: physics.

SUBSTANCE: loop filter 6 includes a region classification unit 12 for extracting an estimate value of each of the regions which make up a local decoded image in order to classify each of the regions into a class belonging to the region, according to the estimate value, and a unit 13 for forming and processing a filter for each class belonging to one or more regions from the regions which make up the local decoded image, forming a Wiener filter which minimises the error arising between the input image and the local decoded image in each of the one or more regions belonging to a class, in order to compensate for the distortion on the one or more regions using the Wiener filter.

EFFECT: high image quality.

3 cl, 18 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to controlling filtering and particularly to controlling deblocking filtering on block boundaries in a video frame. A block-specific filter decision value is calculated for a pixel block in a video frame. If the block-specific filter decision value is below a block-specific threshold, each line or column in the block is individually processed in order to select between a strong and a weak deblocking filter. A respective line-specific filter decision value is thereby calculated for each row or column in the block and compared to a line-specific threshold. If the line-specific filter decision value calculated for a row or column is below the line-specific threshold a strong deblocking filter is selected for the row or column, otherwise a weak deblocking filter is instead selected to combat any blocking artefacts.

EFFECT: high efficiency of deblocking filtering by eliminating or reducing blocking artfacts.

11 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device contains a receiver receiving and syntactically analyzing a bit flow of a coded image; a processor forming a coding unit which is included into a maximum coding block which has hierarchical structure by means of use of the information which indicates this hierarchical structure, syntactically analyzed from the accepted bit flow and forms one sub-block for prediction of a coding block from the coding block, by means of use of information on blocks of a prediction of the named coding block, an image recovery decoder.

EFFECT: higher efficiency of decoding of high-resolution images by determining the depth of the coding unit and the operating mode of the encoding tool according to data characteristics of the image.

5 cl, 8 tbl, 23 dwg

FIELD: information technology.

SUBSTANCE: in the method, after using a modified LBP technique, calculation of LBP code values and search for equivalent LBP code values are performed in rank and domain regions, formed by the same number of pixels located on a circle, where the radius of the circle of the domain region is greater than the radius of the circle of the rank region; the number of pixels, the radius of the circle and the coordinates of the position of the centre pixel for the rank and domain regions are stored.

EFFECT: faster encoding through selection of image characteristics which describe the domain and rank regions.

4 dwg

FIELD: physics.

SUBSTANCE: adaptation is performed by rearranging fragments of discrete cosine transform (DCT) coefficients obtained after two-dimensional DCT on the time axis and subsequent one-dimensional DCT such that the total number of non-zero transform coefficients after three-dimensional DCT is less than the number of non-zero DCT coefficients obtained after three-dimensional DCT without rearranging two-dimensional DCT fragments. In the disclosed method, after forming a domain measuring nnn pixels, DCT coefficients are calculated on spatial coordinates x and y for each fragment of the domain. The fragments are then rearranged in the form of a rearrangement vector and a time DCT operation is performed. The DCT coefficients are sampled, encoded and transmitted over a communication channel with the rearrangement vector. At reception, said procedures are performed in reverse order and the original video stream is restored.

EFFECT: high degree of compression of video data with a given image reconstruction error at reception owing to adaptation to variation of static properties of images.

3 cl, 9 dwg

FIELD: information technologies.

SUBSTANCE: method of coding of video data is offered which comprises the obtaining from the coded stream of bits of one or more units of network abstraction level (NAL) for each component of view from a set of components of view of the coded video data where each component of view from the set of components of view corresponds to the common temporary location and where one or more NAL units encapsulate at least a part of the coded video data for the respective components of view and comprise an information specifying the sequence of decoding of the respective components of view. The method also comprises the received information separate from NAL units specifying the relations between the view identifiers for these views and sequence of decoding of components of view. One or more NAL units also comprise the information specifying, whether the first view component of the first view as the reference for prediction between the views of the second component of view for the second different view is used.

EFFECT: coding efficiency improvement.

68 cl, 18 tbl, 12 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to computer engineering. A method of coding video data comprises maintaining a plurality of context models for entropy coding transform coefficients of the video data, wherein the plurality of context models includes one or more context models that are each used for a different transform unit size and at least one joint context model used for two or more transform unit sizes; selecting the joint context model shared by a first transform unit and a second transform unit; selecting contexts for the transform coefficients associated with one of the first transform unit or the second transform unit according to the joint context model; and entropy coding the transform coefficients of said one of the transform units using context adaptive binary arithmetic coding (CABAC) based on the selected contexts.

EFFECT: reduced amount of memory needed to store contexts and probabilities on video coders and decoders.

34 cl, 9 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to image processing means. The method includes creating a plurality of frames of a picture and related prediction reference frames; for each frame and related prediction reference frame, calculating the intensity value and the colour value in a first colour domain; for each frame and related prediction reference frame, calculating weighted prediction gains; if said gains are non-negative, determining that a global transition with zero offset is occurs in a second colour domain; and if not all of said gains are non-negative, determining that a global transition with gradual change in illumination does not occur.

EFFECT: high efficiency of an image display means when encoding and processing video.

28 cl, 16 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to the field of digital signal processing and, in particular, to the field of video signal compression using the movement compensation. The coding method includes the obtaining of target number of movement information predictors to be used for the coded image section and generation of the set of movement information predictors using the obtained target quantity. The set is generated by means of: obtaining of the first set of movement information predictors, each of which is connected with the image section having the pre-set spatial and/or time ratio with the coded image section; modifications of the first set of movement information predictors by removal of the duplicated movement information predictors for obtaining of the reduced set of movement information predictors containing the first number of movement information predictors, and each movement information predictor from the reduced set differs from any other movement information predictor from the reduced set; comparisons of the first number of movement information predictors with the target quantity obtained, and if the first quantity is less than the target quantity, obtaining of the additional movement information predictor and its addition to the reduced set of movement information predictors.

EFFECT: decrease of spatial and time redundancies in video flows.

26 cl, 8 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to a broadcasting system for transmitting a digital television program, particularly a transmission device and a transmission method, in which content which meets needs can be acquired. A server generates a script PDI-S for obtaining a user side PDI-A representative of an answer of a user to a question about user preferences; generates launch information for executing the PDI-A; and transmits the launch information and PDI-S in response to the delivery of broadcast content, and transmits to the client in response to the delivery of reference content a provider side PDI-A representative of an answer set by a provider to the question. The client executes the PDI-S based on detection of launch information and carries out matching between the user side PDI-A and the provider side PDI-A to determine acquisition of reference content delivered by the server.

EFFECT: facilitating delivery of content to a client which satisfies the needs thereof at that time.

10 cl, 48 dwg

FIELD: physics.

SUBSTANCE: loop filter 6 includes a region classification unit 12 for extracting an estimate value of each of the regions which make up a local decoded image in order to classify each of the regions into a class belonging to the region, according to the estimate value, and a unit 13 for forming and processing a filter for each class belonging to one or more regions from the regions which make up the local decoded image, forming a Wiener filter which minimises the error arising between the input image and the local decoded image in each of the one or more regions belonging to a class, in order to compensate for the distortion on the one or more regions using the Wiener filter.

EFFECT: high image quality.

3 cl, 18 dwg

FIELD: physics.

SUBSTANCE: adaptation is performed by rearranging fragments of discrete cosine transform (DCT) coefficients obtained after two-dimensional DCT on the time axis and subsequent one-dimensional DCT such that the total number of non-zero transform coefficients after three-dimensional DCT is less than the number of non-zero DCT coefficients obtained after three-dimensional DCT without rearranging two-dimensional DCT fragments. In the disclosed method, after forming a domain measuring nnn pixels, DCT coefficients are calculated on spatial coordinates x and y for each fragment of the domain. The fragments are then rearranged in the form of a rearrangement vector and a time DCT operation is performed. The DCT coefficients are sampled, encoded and transmitted over a communication channel with the rearrangement vector. At reception, said procedures are performed in reverse order and the original video stream is restored.

EFFECT: high degree of compression of video data with a given image reconstruction error at reception owing to adaptation to variation of static properties of images.

3 cl, 9 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to the field of digital signal processing and, in particular, to the field of video signal compression using the movement compensation. The coding method includes the obtaining of target number of movement information predictors to be used for the coded image section and generation of the set of movement information predictors using the obtained target quantity. The set is generated by means of: obtaining of the first set of movement information predictors, each of which is connected with the image section having the pre-set spatial and/or time ratio with the coded image section; modifications of the first set of movement information predictors by removal of the duplicated movement information predictors for obtaining of the reduced set of movement information predictors containing the first number of movement information predictors, and each movement information predictor from the reduced set differs from any other movement information predictor from the reduced set; comparisons of the first number of movement information predictors with the target quantity obtained, and if the first quantity is less than the target quantity, obtaining of the additional movement information predictor and its addition to the reduced set of movement information predictors.

EFFECT: decrease of spatial and time redundancies in video flows.

26 cl, 8 dwg

FIELD: physics.

SUBSTANCE: method of decoding an image comprises steps of: determining hierarchically structured encoding units for decoding an image, a prediction unit and a transformation unit; obtaining transformation coefficients from a bitstream through analysis and restoring encoded data of at least one prediction unit by performing entropy decoding, inverse quantisation and inverse transformation of the transformation coefficients obtained by analysis; performing intra-prediction or mutual prediction of the restored encoded data and restoring the encoded video.

EFFECT: high efficiency of compressing, encoding and decoding images.

4 cl, 18 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to video encoding techniques. Disclosed is a method of encoding a 3D video signal. The method includes a step of providing at least a first image of a scene as seen from a first viewpoint. The method also includes providing rendering information for enabling a decoder to generate at least one rendered image of the scene as seen from a rendering viewpoint, different from the first viewpoint. The method also includes providing a preferred direction indicator defining a preferred orientation of the rendering viewpoint relative to the first viewpoint.

EFFECT: high quality of generating images from different viewpoints by generating a preferred direction indicator.

13 cl, 4 dwg

Brightness meter // 2549605

FIELD: instrumentation.

SUBSTANCE: brightness meter contains an opaque light filter attached to a piezoelectric element which is connected to a frequency divider output, a lens, a pyramidal mirror octahedron with four external smooth surfaces and four disk photodetectors, each with two photoreception sectors. Photoreception sectors are fitted with colour light filters. The output of each photoreception sector is connected to the input of an analogue-digital converter. Each analogue-digital converter comprises the pulse amplifier to the output of which pulse light-emitting diodes are connected. Radiation from each light-emitting diode enters the group of eight identical photodetectors, each of which has on the reception side a neutral light filter with a ratio respectively of the register digit weight to which the output of each photodetector is connected.

EFFECT: possibility of synchronous receiving of brightness codes of eight colour components of the spectrum.

2 dwg, 1 tbl

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to image compression systems and methods. The method of compressing a digital image in a computing device comprises steps of dividing an image into a plurality of image subregions; selecting from a catalogue which includes a plurality of predetermined template forms, wherein each template form comprises a plurality of elements, properties and image variables, such as colour, colour gradient, gradient direction or reference pixel, and wherein each said form is identified by a code, the template form of each subregion best corresponding to one or more image elements of said subregion; and generating a compressed data set for the image, wherein each subregion is represented by a code which identifies the template form selected therefor.

EFFECT: improved compression of image data, thereby reducing the amount of data used to display an image.

22 cl, 4 dwg

FIELD: physics.

SUBSTANCE: this method comprises memorising the input raster video image as a flow of frames in the line input buffer. Said frames are splitted to micro blocs. The latter are compressed and stored in external memory. For processing, said micro blocs are retrieved from external memory, unclasped and written to internal memory. Raster macro blocs are formed and processed by appropriate processors.

EFFECT: efficient use of internal memory irrespective of processing algorithm type.

22 cl, 2 dwg

FIELD: physics, photography.

SUBSTANCE: invention relates to an image processing device and method, which can improve encoding efficiency, thereby preventing increase in load. The technical result is achieved due to that a selection scheme 71 from a prediction scheme 64 by filtering selects a motion compensation image for generating a prediction image at a high-resolution extension level from key frames at a low-resolution base level. The filter scheme 72 of the prediction scheme 64 by filtering performs filtration, which includes high-frequency conversion and which uses analysis in the time direction of a plurality of motion compensation images at the base level, selected by the selection scheme 71, in order to generate a prediction image at the extension level.

EFFECT: reducing load in terms of the amount of processing owing to spatial increase in sampling frequency at the base level for encoding the current frame.

19 cl, 26 dwg

FIELD: information technology.

SUBSTANCE: method of compression of graphic file by fractal method using ring classification of segments, in which the graphic file is split into rank regions and domains, and for each rank region the domain and the corresponding affine transformation is found, that best approximates it to the appropriate rank region, and using the obtained values of the domain parameters, comprising their coordinates, the coefficients of the affine transformations, the values of brightness and contrast, the archive is formed, and classification of domains and rank regions are introduced, based on the allocation in them of the "rings" and the calculation of the mathematical expectation of pixel intensity of these "rings", which enables to reduce the complexity of the phase of correlation of the segments and to accelerate compression.

EFFECT: reduced time of compression of the graphic file by fractal method.

3 dwg

FIELD: systems for encoding and decoding video signals.

SUBSTANCE: method and system for statistical encoding are claimed, where parameters which represent the encoded signal are transformed to indexes of code words, so that decoder may restore the encoded signal from aforementioned indexes of code words. When the parameter space is limited in such a way that encoding becomes inefficient and code words are not positioned in ordered or continuous fashion in accordance with parameters, sorting is used to sort parameters into various groups with the goal of transformation of parameters from various groups into indexes of code words in different manner, so that assignment of code word indexes which correspond to parameters is performed in continuous and ordered fashion. Sorting may be based on absolute values of parameters relatively to selected value. In process of decoding, indexes of code words are also sorted into various groups on basis of code word index values relatively to selected value.

EFFECT: increased efficiency of compression, when encoding parameters are within limited range to ensure ordered transformation of code word indexes.

6 cl, 3 dwg

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