Video predictive encoding device, video predictive encoding method, video predictive decoding device and video predictive decoding method

FIELD: data processing.

SUBSTANCE: invention relates to motion picture coding/decoding. Decoding device comprises: decoding means for decoding an internal prediction mode, a prediction signal generating means to generate a prediction signal within the image using the direction information and the previously reconstructed reference sample of the adjacent block, means for recovering the residual signal for reconstructing the reconstructed residual signal of the target block and a block storage means for restoring and storing the pixel signal of the target block. Method describes operation of the device.

EFFECT: technical result is enabling suppression of artificial noise.

2 cl, 17 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, video.

SUBSTANCE: invention relates to video encoding/decoding techniques which employ a loop filter which reduces blocking noise. The technical result is achieved due to that a video encoding/decoding device, which encodes or decodes video using a loop filter, includes a deviation calculating unit which calculates deviation between a target noise cancellation pixel and a neighbouring pixel of the target pixel using a decoded image. A pattern form establishing unit limits the pattern form such that the less the deviation from the maximum deviation in the decoded image, the smaller the pattern form. When removing target pixel noise, using a weight coefficient in accordance with the degree of similarity between the pattern of the target pixel and the pattern of each search point in the form of a search and a weighted sum of pixel values at search points, the loop filter compares patterns using the limited pattern form and removes the target pixel noise.

EFFECT: reduced computational complexity of the noise cancellation filter, thereby preventing deterioration of encoding efficiency.

5 cl, 19 dwg

FIELD: information technology.

SUBSTANCE: device includes an input lens, a memory unit, a bus, a video sensor, a movement estimation unit, a frequency divider and video sensor resolution selection unit, a unit for single-step enhancement of the whole frame, a clock frequency generator unit, a unit for selecting faces of people, a unit for iterative enhancement faces of people, an image combining unit and a conflict resolver.

EFFECT: high quality of facial images contained in frames of an input video sequence, high quality of moving and fixed regions of the image by increasing spatial resolution of the image and reducing the blurring effect arising from relative movement of the imaging device and the captured scene.

2 dwg

FIELD: information technologies.

SUBSTANCE: method includes performance of the following operations: digital copy of initial printed document is produced in colour space of RGB, brightness difference is detected, and direction of maximum gradient is determined, current count of image is classified for its affiliation to area of brightness difference or uniform area without sharp changes of brightness, Gauss smoothening of current count is made, if it is classified as belonging to uniform area without sharp changes of brightness, current count is smoothened in anisotropic manner, if it is classified as belonging to the area of brightness difference.

EFFECT: invention makes it possible to carry out fast single-stage descreening of screen-type pattern images with preservation of contour differences and increased accuracy.

5 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: first band pass (BP) is determined based on initial image data; a matrix of filter coefficients (FC) is calculated to obtain frequency characteristics corresponding to limitation of frequency band (FB) using the first BP; data of the first filtered image are generated by filtering data of the initial image using the matrix of first FC; an estimate value of the objective image quality of data of the first filtered image is obtained and the distribution coefficient (DC) is calculated, which is used to determine the optimum BP based on the estimate value of objective image quality; the optimum BP corresponding to the calculated DC is determined using a table in which the corresponding relationship between DC and optimum BP is defined; a matrix of optimum FC is calculated to obtain frequency characteristics corresponding to limitation of FB using the optimum BP; and data of the optimally filtered image is generated by filtering data of the initial image using the matrix of optimum FC.

EFFECT: adaptive image filtering process for providing high-quality image.

3 cl, 11 dwg

FIELD: physics; image processing.

SUBSTANCE: present invention can be used, for instance, in resolution transformation. In the device and method for processing images, gradient direction v1 of the edges with the largest gradient of pixel values is detected, as well as direction v2 of the edges, orthogonal to the gradient direction v1 of the edges. Processing is done for improving and smoothing out in the gradient direction v1 and direction v2 of the edges, respectively, so as to generate image output data D2.

EFFECT: prevention of loss of high-frequency components and appearance of stepped images.

10 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: pixels data of the current video sequence frame is recorded to the buffer of current frame, and the pixels data of the previous video sequence frame is recorded to the buffer of previous frame; motion between current and previous video sequence frames is determined in the differences calculation block; the calculated motion between previous and current frames is recorded to the motion data buffer; the data from the current frame buffer is recorded to the previous frame buffer; partial derivatives for every channel of the current frame are determined in the partial derivative calculation blocks for X-direction and Y-direction; spatial averaging of directional derivatives for each channel of the current frame, as well as channels smoothing in the first and the second smoothing blocks are performed; direction of the edge for every pixel position of the current frame is calculated in the arctangent calculator; anisotropic filter for every pixel position of the current frame is formed and recorded to the memory of filter values; anisotropic filtering of all pixels of the current frame, their motion exceeding predefined limit in the anisotropic filtering block, is done.

EFFECT: increased quality of dynamic video picture due to changes in anisotropic filtering with adaptive mask.

7 cl, 2 dwg

FIELD: information technology.

SUBSTANCE: pixels data of the current video sequence frame is recorded to the buffer of current frame, and the pixels data of the previous video sequence frame is recorded to the buffer of previous frame; motion between current and previous video sequence frames is determined in the differences calculation block; the calculated motion between previous and current frames is recorded to the motion data buffer; the data from the current frame buffer is recorded to the previous frame buffer; partial derivatives for every channel of the current frame are determined in the partial derivative calculation blocks for X-direction and Y-direction; spatial averaging of directional derivatives for each channel of the current frame, as well as channels smoothing in the first and the second smoothing blocks are performed; direction of the edge for every pixel position of the current frame is calculated in the arctangent calculator; anisotropic filter for every pixel position of the current frame is formed and recorded to the memory of filter values; anisotropic filtering of all pixels of the current frame, their motion exceeding predefined limit in the anisotropic filtering block, is done.

EFFECT: increased quality of dynamic video picture due to changes in anisotropic filtering with adaptive mask.

7 cl, 2 dwg

FIELD: physics; image processing.

SUBSTANCE: present invention can be used, for instance, in resolution transformation. In the device and method for processing images, gradient direction v1 of the edges with the largest gradient of pixel values is detected, as well as direction v2 of the edges, orthogonal to the gradient direction v1 of the edges. Processing is done for improving and smoothing out in the gradient direction v1 and direction v2 of the edges, respectively, so as to generate image output data D2.

EFFECT: prevention of loss of high-frequency components and appearance of stepped images.

10 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: first band pass (BP) is determined based on initial image data; a matrix of filter coefficients (FC) is calculated to obtain frequency characteristics corresponding to limitation of frequency band (FB) using the first BP; data of the first filtered image are generated by filtering data of the initial image using the matrix of first FC; an estimate value of the objective image quality of data of the first filtered image is obtained and the distribution coefficient (DC) is calculated, which is used to determine the optimum BP based on the estimate value of objective image quality; the optimum BP corresponding to the calculated DC is determined using a table in which the corresponding relationship between DC and optimum BP is defined; a matrix of optimum FC is calculated to obtain frequency characteristics corresponding to limitation of FB using the optimum BP; and data of the optimally filtered image is generated by filtering data of the initial image using the matrix of optimum FC.

EFFECT: adaptive image filtering process for providing high-quality image.

3 cl, 11 dwg

FIELD: information technologies.

SUBSTANCE: method includes performance of the following operations: digital copy of initial printed document is produced in colour space of RGB, brightness difference is detected, and direction of maximum gradient is determined, current count of image is classified for its affiliation to area of brightness difference or uniform area without sharp changes of brightness, Gauss smoothening of current count is made, if it is classified as belonging to uniform area without sharp changes of brightness, current count is smoothened in anisotropic manner, if it is classified as belonging to the area of brightness difference.

EFFECT: invention makes it possible to carry out fast single-stage descreening of screen-type pattern images with preservation of contour differences and increased accuracy.

5 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: device includes an input lens, a memory unit, a bus, a video sensor, a movement estimation unit, a frequency divider and video sensor resolution selection unit, a unit for single-step enhancement of the whole frame, a clock frequency generator unit, a unit for selecting faces of people, a unit for iterative enhancement faces of people, an image combining unit and a conflict resolver.

EFFECT: high quality of facial images contained in frames of an input video sequence, high quality of moving and fixed regions of the image by increasing spatial resolution of the image and reducing the blurring effect arising from relative movement of the imaging device and the captured scene.

2 dwg

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