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System and method of compressing multi-stream video Invention relates to computer engineering. A computer-implemented system for online gaming comprises a video game or application server receiving user inputs transmitted from a client and responsively executing program code of the video game to render a sequence of video images; a first stream encoder to compress the sequence of video images and generate a video stream during a live gaming session with a user of the client device, the first stream encoder receiving channel feedback signals from the client device and responsively adapting compression of the sequence of video images based on the channel feedback signals and continually transmitting the video stream to the client device during the live gaming session with the user; a second stream encoder to compress the sequence of video images with a specified video quality and/or compression ratio unrelated to the channel feedback signal during the live gaming session with the user, thereby generating a high quality (HQ) video stream, and a storage device for storing the HQ video stream for subsequent playback to the user of the client device and to other users upon request. |
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Image encoding method and image decoding method Method comprises predicting a prediction error of a target image to be encoded based on an internal prediction mode; setting a combination of a vertical transformation matrix and a horizontal transformation matrix corresponding to the target image based on a predetermined ratio; transforming the prediction error using the combination of a vertical transformation matrix and a horizontal transformation matrix to obtain transformation coefficients; and encoding the transformation coefficients and information indicating the internal prediction mode for the target image; wherein said combination includes any of a plurality of transformation matrices, including a first transformation matrix and a second transformation matrix which increases the density of the coefficients compared to the first transformation matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line from a group of reference pixel to at least one line is performed over the prediction error in internal prediction mode, in which a group of reference pixels is referenced to generate an image with internal prediction. |
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Invention relates to video encoding and decoding, which provides conversion between a spatial region and a conversion region. The method of encoding video includes breaking down a video image into encoding units having a maximum size. The images are encoded based encoding units according to depths obtained by hierarchically breaking down each maximum depth encoding unit, and based on the type of partition defined according to depths of the depth encoding units. The type of partition includes a data unit having the same size as the current encoding unit, and a partial data unit obtained by breaking down the height or width of the current encoding unit. Encoding units are determined according to encoding depths relative to each of the depth encoding units, and encoding units having a tree structure are therefore determined. The encoded data are output. |
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Encoder for three-dimensional video signals Invention relates to encoding three-dimensional video signals, and specifically to a transport format used to transport three-dimensional content. The technical result is achieved using a device which is characterised by that it includes a means of generating a stream which is structured into multiple levels: level 0, having two independent layers: a base layer containing video data of a right-side image, and a level 0 extension layer containing video data of a left-side image, or vice versa; level 1, having two independent extension layers: a level 1 first extension layer containing a depth map relating to the image of the base layer, a level 1 second extension layer containing a depth map relating to the image of the level 0 extension layer; level 2, having a level 2 extension layer containing overlapping data relating to the image of the base layer. |
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Image processing method and device Invention relates to computer engineering. The image processing device includes an extraction means which performs motion compensation using as a reference frame a frame formed from a decoded image, and using a motion vector in an image that was encoded, and for extracting a motion compensation image corresponding to a predicted image from the reference frame; a means of generating an image with intra-frame prediction which performs intra-frame prediction for the current frame for which the predicted image is to be generated, and which generates an image with intra-frame prediction, which corresponds to the predicted image from a portion of the decoded image; and a means of generating a predicted image, which generates a predicted image by performing filter processing to compensate for high-frequency component shortcomings in the motion compensation image extracted by the extraction means, and an image with intra-frame prediction generated by generating an image with intra-frame prediction using correlation in a temporal direction which is included in the motion compensation image and the image with intra-frame prediction. |
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Video encoding control method, video encoding device and video encoding programme Invention relates to video encoding technology. Disclosed is a method of controlling video encoding, which encodes an input video signal by controlling the generated bit rate to prevent failure of a hypothetical buffer in a decoder. The method includes a step of successively encoding each image in a group of images in an encoding queue in accordance with a predefined encoding parameter. The group of images in the encoding queue includes a predefined number of images and is a set of successive images in the encoding queue. Further, the method includes calculating quantisation statistic of each image based on information about the quantisation parameter used to encode each image every time each image is encoded, and checking if the quantisation statistic exceeds a predefined threshold. |
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Invention relates to computer engineering. A multi-view video encoding method comprising generating a projection-synthesised image on which a projection-synthesised image is synthesised from an already encoded base projection frame, which corresponds to a target encoding frame in a target encoding image; searching for a base portion on the already encoded base frame in the target encoding image which corresponds to the projection-synthesised image, for each processing element portion, having a predefined size; calculating a correction parameter for correcting mismatch between cameras based on the projection-synthesised image for the processing element portion and the base frame for the base portion; correcting the projection-synthesised image for the processing element portion using the calculated correction parameter; and performing predictive video encoding in the target encoding projection using the corrected projection-synthesised image. |
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Insertion of three-dimensional objects in stereoscopic image at relative depth Invention relates to three-dimensional (3D) rendering, particularly processing an image of an object to place said image at a perceptual depth. Methods for rendering at least one object on a stereoscopic image for a display device are provided. Perceptual depth data as a fraction of viewer distance for the object are received, wherein said perceptual depth data can be normalised. A pixel separation offset for a particular display device is calculated from the perceptual depth data. Left and right eye images of the object are respectively inserted into the stereoscopic image with the pixel separation offset, wherein said object includes captioning to be inserted. |
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Invention relates to video encoding and decoding. The video decoding method includes receiving and parsing a bit stream of an encoded video and decoding encoded image data for a maximum size of a coding unit based on information on coding depth and coding mode for the maximum coding unit based on a raster scanning order for the maximum coding unit and a zigzag scanning order for coding units of the maximum depth coding unit. |
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Invention relates to image encoding. The image predictive coding apparatus includes: a partitioning module for dividing an input image into a plurality of units; a prediction signal generating module for generating a prediction signal relative to a pixel signal which is included in the unit under consideration, which is to be processed, from a plurality of units; a residual signal generating module for generating a residual signal between the pixel signal of the unit under consideration and the generated prediction signal; a signal encoding module for generating a compressed signal by encoding the residual signal; and a storage module for decompressing the compressed signal and storing the decompressed signal as a reconstructed pixel signal. |
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Invention relates to multiview image encoding/decoding. The technical result is increasing efficiency of encoding multiview images in which there is localised mismatch of illumination and colour between cameras, a well as reducing the amount of code. The invention provides, when dividing an encoded and decoded frame and encoding/decoding each region, generation of a prediction image not only for the processed region, but for already encoded/decoded regions adjacent to the processed region. Prediction images are generated using the same prediction method. A correction parameter is then estimated for correcting mismatch of illumination and colour from the predicted images and the decoded images of adjacent regions. An estimated correction parameter can be found even at the decoding side. Encoding is therefore unnecessary. |
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At transmitting side, each video signal code processing channel includes a "code 2n-code 2n-1" converter and each audio code processing channel includes a "sound-code" converter and at the receiving side, each screen matrix element is made from one emitting cell. |
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Recording medium, playback device and integrated circuit Invention relates to means of distributing a video stream on a recording medium when playing back three-dimensional video. The device includes a reading unit for reading extent blocks from the recording medium, a switching unit which selects main and additional view streams from the extent blocks. In the device, each stream is stored in a reading buffer, a decoding unit reads and decodes each stream from the corresponding reading buffer, the time (t) required by the decoding unit to decode all data units in one extent block is greater than or equal to the sum (t1+t2+t3) of the time (t1) required to read data units except the initial data unit in the extent block, the time (t2) required to read the initial part of the next extent block from the end reading the end of the extent block and the time (t3) required to read the initial data unit in the next extent block. |
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Recording medium, playback device and integrated circuit Invention relates to means of playing back stereoscopic and monoscopic images. The device has a reading unit which successively reads a plurality of packets stored in a stream file; a demultiplexing unit for demultiplexing packets with predetermined packet identifiers, a decoder for decoding packets demultiplexed by the demultiplexing unit. In the device, in stereoscopic playback mode, the demultiplexing unit uses packet identifiers indicated by stream records associated with stream numbers from a list of elementary streams in an extended stream selection table. |
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Invention relates to a recording device which stores a basic image stream and an extended image stream, obtained by encoding multiview video. The technical result is that data on the medium using the disclosed record encoding may be reproduced in a device which is incompatible with reproduction of multiview video. In an Access Unit containing basic video display, MVC header encoding is prohibited. For a display component contained in an Access Unit without a MVC header, determination is carried out such that the "view_id" parameter thereof is recognised as 0. |
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Invention relates to devices for reproducing and recording files. The file includes alternating data that are physically and continuously recorded on a disc 21, obtained by dividing each data stream of files B and D into alternating elements and alternating the alternating elements, and position information indicating, via an alternating element which is a data fragment in ISO media file format, the position of said alternating element forming said data fragment. Furthermore, a reproducing device 22 divides the alternating data into alternating elements of each of the files B and D based on the position information. |
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Image processing method and device Invention relates to image processing means. The device has a first and a second extraction means, where the first extraction means is designed for motion compensation and extraction of a motion compensation image corresponding to a predicted image, and the second extraction means is designed for extracting a part which coincides with the motion compensation image extracted by said first means, which is a motion compensation image corresponding to the predicted image, a means of generating a predicted image by performing filter processing over the motion compensation image extracted by the first and second extraction means, where the filtering process adds a high-frequency component by using correlation in a temporal direction included in the motion compensation image. |
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Device for colouring black and white image Device comprises RGB→NTSC converter units (1), (20), a label mask selection unit (2), multiplier units (3), (18), (19), a breakdown unit (4), a dispersion calculation unit (6), a weight function generating unit (10), a label coordinate determining unit (5), buffer units (7), (8), (12), (21) delay units (11), (13), (14), (15), (16), a sparse matrix generating unit (17), a control unit (9), a clock-pulse generator (22). |
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Autostereoscopic rendering and display apparatus Invention relates to means of reproducing an autostereoscopic image. The method includes detecting the position and orientation of a user viewpoint with respect to an autostereoscopic display; determining the surface of a three-dimensional object viewable from the user viewpoint; determining a projection surface of the three-dimensional object on a second display viewable from the user viewpoint; generating a left and right eye image for display depending on the surface viewable from the user viewpoint; generating a projection image for display on the second display depending on the projection surface viewable from the user viewpoint. |
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Image encoding device and method Device for encoding moving images for increasing the compression ratio of a moving image signal while maintaining high image quality. To minimise the number of bits required for a residual unit, quantised conversion coefficients are adaptively divided into a plurality of subsets in accordance with the size of the conversion unit, and non-zero quantised conversion coefficients of each subset are scanned and encoded. The intra-prediction mode of the current unit is also determined using reference pixels obtained by filtering reference pixels of the current unit. Therefore, minimisation of the amount of data required for the residual unit from the current unit is possible. |
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Image processing method and device Invention relates to computer engineering. The image processing device comprises a module for calculating residual energy in spatial mode, configured to use motion vector information according to a spatial motion prediction mode for a target unit using a peripheral pixel situated adjacent to the target unit in a given position ratio with said unit and also included in a decoded image; a module for calculating residual energy in temporal mode, configured to use motion vector information according to a temporal motion prediction mode for the target unit using said peripheral pixel; and a module for determining a motion predictive coding mode, configured to determine that target unit coding should be performed in spatial motion prediction mode if residual energy in the spatial mode is not greater than residual energy in the temporal mode, and determined that target unit coding should be performed in temporal motion prediction mode if residual energy in the spatial mode is greater than residual energy in the temporal mode. |
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Invention relates to computer engineering. The motion vector predictive encoding method in a moving picture coding scheme comprising motion detection for a unit in an image using an encoded reference image for calculating a motion vector; selecting N (N is an integer equal to or greater than 2) motion vectors which include motion vectors used to encode encoded units, or motion vectors having a predefined value as primary candidate reference motion vectors; calculating the degree of reliability of each of the N primary candidate reference motion vectors; selecting the primary candidate reference motion vectors with a degree of reliability greater than a predefined threshold value from the N primary candidate reference motion vectors as secondary candidate reference motion vectors; calculating a predictive motion vector of a unit using secondary candidate reference motion vectors and encoding the remainder between the motion vector obtained by detecting movement of a unit, and the predictive motion vector as encoded motion vector information. |
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Data processing device, data processing method, reproducing device, reproducing method and programme Invention relates to a reproducing device, a reproducing method and a portable data medium, a data processing device and a data processing method, which enable to appropriately reproduce 3D images. The reproducing device has a reading means which reads, from the data medium, an interleaved file in which a first and a second multiplexed stream are interleaved with increment by a fragment of a predefined amount of data, reads a first information file, which represents data from said first multiplexed stream, and the number of the initial packet in said first multiplexed stream for each fragment, and reads a second information file, which represents data from said second multiplexed stream, and the number of the initial packet in said second multiplexed stream for each fragment; and a dividing means for dividing said interleaved file into said first and second multiplexed streams using said first and second information files. |
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Recording medium, playback device and integrated circuit Invention relates to the technology of playing back 3D and 2D video. A recording medium facilitates seamless connection between preceding play items which are streaming data located before a long transition and subsequent play items which are streaming data located after the long transition. An interleaved stream includes a general view stream for playing back 2D video and a sub-view stream for playing back 3D video in a combination with the general view stream. An Ln2D unit, designed for 2D playback, is arranged such that it follows a 3D extension unit in which a depth map data unit, a right view point data unit and a left view point data unit are interleaved. The 3D extension unit, which includes an L3ss unit designed for 3D playback, is located between the Ln2D unit and the LB point of the long transition. The Ln2D unit an the L3ss unit are identical on content. |
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Method of encoding video by performing in-loop filtering based on coding units includes splitting a picture into a maximum coding unit which is a data unit, the maximum coding unit having a maximum size; separately determining coding units for outputting encoding results according to a coded depth for deeper coding units that are hierarchically structured according to depths indicating a number of times the coding units are spatially split from the maximum coding unit; determining a filtering unit for performing in-loop filtering so as to minimise an error between the maximum coding unit and an original picture, based on the coding units corresponding to the tree structure of the maximum coding unit; and performing in-loop filtering based on the determined filtering unit. |
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Moving image encoding device and moving image decoding device Moving image encoding device has a unit for dividing an image into macroblock images of two or more blocks and dividing each of the macroblock images into a block image of one or more blocks in accordance with an encoding mode; and an intra-prediction unit for the block image; a motion-compensated prediction unit for carrying out an image motion-compensated prediction for a block; a transformation and quantisation unit for a prediction difference signal which is generated by subtracting the prediction image from the block image to generate compressed data; a variable length encoding unit for entropy-encoding said compressed data to multiplex said compressed data into a bitstream; and an encoding control unit for selecting a certain transformation block size from a set of transformation block sizes to report said transformation block size to said transformation/quantisation unit, wherein said transformation/quantisation unit divides said prediction difference signal into blocks having said transformation block size and carries out a transformation and quantisation process for each of the blocks to generate compressed data. |
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Invention relates to a motion vector estimation method and a multiview video encoding and decoding method. The motion vector estimation method includes: a view synthesised picture generation step of generating, from a reference camera video, a view synthesised picture at a time when the processing picture was been taken; and a corresponding region estimation step of estimating a motion vector by searching for a corresponding region in a reference picture taken by the processing camera using a picture signal on the view synthesised picture corresponding to a processing region on the processing picture without using a processing picture taken at a time at which a motion vector is to be estimated. |
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Reproducing device, recording method, recording medium reproducing system Invention relates to the technology of reproducing three- and two-dimensional images. A reproducing device for reproducing a recording medium storing a main view video stream, an auxiliary view video stream and a graphic stream. The main view video stream includes image data making up the main view of a stereo image and the auxiliary view video stream includes metadata and image data making up the auxiliary view of the stereo image. The graphic stream includes graphic data and a graphic plane on which graphic data are rendered, and overlaps with the main view video plane and the auxiliary view video plane on which corresponding image data are rendered. The metadata represent control information which provides shift control which applies left and right shift to horizontal coordinates in the graphic plane when the graphic plane overlaps with the main view video plane and the auxiliary view video plane. |
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Invention relates to a reproducing method and apparatus, a recording medium, a recording apparatus and a recording method, and can be used, for example, in a reproducing apparatus which displays a sub-image in 3D mode. A right-eye video stream includes offset metadata for generating offset information. In a data portion of each TS packet of the right-eye video stream, only any one of video data of an encoded right-eye main image and offset metadata is arranged. In a header of each TS packet of the right-eye video stream, transport priority, which indicates whether data arranged in the data portion of the TS packet are video data of an encoded right-eye main image or offset metadata, is described. |
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Tiling in video encoding and decoding Invention relates to video encoding and/or decoding and can be used in display devices for structures with relative or tile arrangement of different displayed elements in one frame. The video encoding method includes steps of accessing a video picture which includes multiple pictures combined into a single picture, accessing information indicating how the multiple pictures in the accessed video picture are combined, decoding the video picture to provide a decoded representation of at least one of the multiple pictures, and providing the accessed information and the decoded video picture as output; formatting or processing the information which indicates how multiple pictures included in a single video picture are combined into the single video picture, and formatting or processing an encoded representation of the combined multiple pictures. |
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Installation to measure angular field and to monitor step size of test-object mira lines Installation comprises a collimator with a test-object, a monitored item and a measuring unit. The test-object is made as a cross hair and rigidly fixed in the focal plane of the collimator. The monitored item is made as television or thermal imaging one, its radiation detector is set in the focal plane of the lens of the monitored item. A flat mirror able of rotating around the vertical axis is installed between the collimator and the monitored item. The collimator output via the flat mirror is connected to the monitored item lens. The measuring unit comprises a panel for synchronisation and formation of line illumination pulse and two margin pulses, a double-beam oscillograph and a video monitor. The monitored item output is connected to the input of the first channel in the double-beam oscillograph and to the input of the panel for synchronisation and formation of line illumination pulse and two margin pulses, while the first output of the latter is connected to the video monitor input. The second output of the said panel is connected to the input of the second channel in the double-beam oscillograph. |
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Video data filtration with help of multiple filters Invention relates to filtration of video data with the help of multiple filters. Proposed method comprises reception and decoding of multiple filters built in video data bit flow in video decoder. Note here that particular filter is selected from said multiple filters proceeding from said data built in video data bit flow. Particular filter is applied to, at least a portion of decoded video data of bit video data flow to generate filtered decoded video data. |
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Recording medium, playback device and integrated circuit Group of inventions relates to the technology of playing back stereoscopic video and particularly to selection of a video stream on a recording medium. The playback device for playing back video from a recording medium includes a reading unit configured to read a plurality of base-view stream file extents and dependent-view stream file extent after extent. The base-view stream file is used for monoscopic video playback, and the dependent-view stream file is used for stereoscopic video playback in combination with the base-view stream file. The recording medium has a stereoscopic/monoscopic common area, a stereoscopic special area and a monoscopic area. The stereoscopic/monoscopic common area is a continuous area in which a plurality of extents belonging to the base-view stream file and a plurality of extents belonging to the dependent-view stream file are recorded using an interleaving method, wherein the interleaved plurality of extents recorded in the stereoscopic/monoscopic common area are first extents. |
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Data medium and reproducing device for reproducing 3d images Invention relates to means of reproducing streaming video. The device includes a stream selection table which indicates a stream record and an attribute of a subtitle stream reproduced in monoscopic mode, and has a register for storing information on the video shift mode, where the video shift mode includes an upward and a downward shift. When shifting an image upwards or downwards, the device shifts video data generated from the video stream in the video plane upwards or downwards and places subtitle data generated from the subtitle stream in the bottom or top end of the video plane, respectively. |
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Invention relates to computer engineering. A motion vector predictive encoding method in a moving picture encoding scheme involves performing a motion search for a block to be encoded, using an encoded reference picture; setting a plurality of blocks located in predetermined positions relative to the position of the block to be encoded as primary candidate blocks, and determining N primary candidate reference motion vectors from motion vectors used in encoding the primary candidate blocks; calculating degrees of reliability of the primary candidate reference motion vectors using encoded picture information for each of the primary candidate reference motion vectors; selecting upper M primary candidate reference motion vectors having higher degrees of reliability from the N primary candidate reference motion vectors as secondary candidate reference motion vectors; and calculating a predictive motion vector of the block using the secondary candidate reference motion vectors, and encoding a residual between the motion vector and the predictive motion vector. |
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Invention relates to predictive motion vector predictive encoding/decoding of moving pictures. The moving picture encoding apparatus includes a primary candidate reference motion vector determination unit which sets N primary candidate reference motion vectors, a degree of reliability calculation unit which calculates the reliability of each primary candidate reference motion vector which quantitatively represents effectiveness in motion vector prediction of the block to be decoded, using encoded or decoded picture information, a reference motion vector determination unit selects M (M<N) secondary candidate reference motion vectors in accordance with the degree of reliability of N primary candidate reference motion vectors, a motion vector encoding unit calculates a predictive motion vector of the block to be encoded using M secondary candidate reference motion vectors with high reliability. |
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Method for alphabetical image representation Method for alphabetical representation of images includes a step for primary conversion of an input image to a multi-centre scanning (MCS) format, constructed according to rules of a plane-filling curve (PFC). The initial MSC cell is a discrete square consisting of nine cells (3×3=9), having its own centre and its own four faces (sides). Scanning of the initial MSC cell is performed from the centre to the edge of the square while bypassing the other cells on a circle. The path with a bypass direction to the left from the centre of the square and then on a circle, clockwise, is the priority path for scanning and displaying images. |
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Method and system for processing input three-dimensional video signal Group of inventions relates to a system and a method of processing an input three-dimensional (3D) video signal containing multiple views. The method of processing an input 3D video signal containing multiple views involves estimating long-range disparity which indicates the highest disparity value for the input 3D video signal. The method also includes a step of estimating short-range disparity which indicates the lowest disparity value for the spatial region in the input 3D video signal. The method further involves adaptation of the input 3D video signal by shifting the disparity range of the input 3D video signal from an observer by shifting disparity based on the long-range disparity estimate. |
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Video encoding method and apparatus, and video decoding method and apparatus Invention relates to video encoding and decoding. Disclosed is a video encoding method which comprises steps of: dividing a current picture into at least one maximum coding unit, determining encoded depth to derive the final encoding result according to at least one division region obtained by dividing the maximum the region of the maximum coding unit according to depths, by encoding at least one division region based on depth which is increased in proportion to the number of times the region of the maximum coding unit is divided; and outputting image data constituting the final encoding result according to at least one division region, and encoding information on encoded depth and a prediction mode according to at least one maximum encoding unit. |
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Group of inventions relates to means of providing three-dimensional (3D) images. The method comprises a step of providing a pair of images for the left and right eyes of a viewer for inclusion into a signal; a step for providing a depth map comprising depth index values, intended for the first image of said pair, for inclusion into the signal, where said index relates to a portion of the first image and denotes distance between an object, partially represented by the portion of the first image, and the viewer; a step for providing reproduction control data for inclusion into the signal, where said data establish parameters for production contexts, the parameters relating to generation of an image with an offset point of view from the first image and the depth map intended for said first image. |
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Method of encoding video comprises steps of: breaking down a video image into one or more maximum coding units, encoding the image based on coding units according to depths obtained via hierarchical breakdown of each of the one or more maximum coding units, and outputting data which are encoded based on the coding units, having a tree structure, information with respect to the encoded depths and the encoding mode and information of the structure of the coding units, indicating the size and variable depth of the coding units. |
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Method of encoding an image using an adaptive coefficient scan order comprises: projecting coefficients of a current block to a reference axis, from among a horizontal axis and a vertical axis, along a first straight line perpendicular to a second straight line with a predetermined angle α from the reference axis; scanning the coefficients of the current block in an arrangement order of the projected coefficients projected to the reference axis; and entropy-encoding information about the predetermined angle α and the scanned coefficients. |
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Hypothetical reference decoder for scalable video coding Invention relates to a hypothetical reference decoder (HRD) for scalable video coding (SVC). The invention proposes to modify the H.264/AVC HRD standard for use with the SVC of advanced video coding (AVC). That implementation defines HRD constraints for each interoperability point of SVC. The changes for spatial, temporal and SNR scalability are shown. There are also changes to the related HRD parameters that are shown. At least one implementation proposes the SVC-HRD rules as modifications to the AVC-HRD rules. A user may use the proposed SVC-HRD rules to build an SVC-HRD and test a bitstream for SVC compliance. |
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Invention relates to predictive encoding and decoding of a motion vector. The method of encoding a motion vector comprises steps of generating information about the motion vector based on a motion vector of a current block and a motion vector predictor of the current block, generating a virtual motion vector, generating vector differences between the virtual motion vector and the plurality of motion vector predictor candidates, comparing the vector differences with the information about the motion vector, and selectively excluding the second motion vector predictor candidate according to the comparison, and encoding the information about the motion vector and information about the motion vector predictor of the current block. |
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Invention relates to autostereoscopic displays. The result is achieved by making each column element of the display based on a pair of liquid crystal layers with complementary optical properties. The increase in the degree of separation of views is a result of increase in contrast of modulation of light intensity owing to cancellation of initial birefringence and chromatic dispersion of the liquid crystal layers in each column element of a parallax light shutter. Higher speed of operation is a result of the transition time of switching images of views being defined only by a short reaction time of the liquid crystal layers to application of a high control voltage. |
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Encoder optimisation in stereoscopic video delivery systems Invention relates to video encoding and more specifically to encoding stereoscopic video and video with multiple images. Disclosed is control of a feature of an encoding process for regions of an image pattern representing more than one image for encoding with the encoding process when the regions include an amount of disparity in the represented images that results in cross-contamination between the represented images if encoded with the feature. The control may be, for example, any of turning the encoding feature off, using the encoding feature less often than when encoding an image pattern representing a single image, negatively biasing the encoding feature, and enabling the encoding feature for regions determined to have zero or near zero disparity and disabling the feature for all other regions. |
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Computational complexity and precision control in transform-based digital media codec Invention relates to block transform-based encoding. The disclosed digital multimedia data encoder/decoder includes signalling various modes relating to computational complexity and precision during decoding. The encoder may send a syntax element indicating arithmetic precision (e.g., using 16- or 32-bit operations) of the transform operations performed during decoding. The encoder may also signal whether to apply scaling to the decoder output, which provides a wider dynamic range of intermediate data during decoding, but adds to computational complexity due to the scaling operation. |
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Method and apparatus for reproducing video with modified rate Invention relates to method and an apparatus for reproducing video with a modified rate. The method involves reproducing video in 3D, receiving a request to reproduce video at a playback rate of Nx (N is a positive integer equal to or greater than 2) and reproducing video at a playback rate of Nx in response to the request. Reproduction of video at a playback rate of Nx includes reproducing video at a playback rate of Nx in 2D form. |
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Invention relates to video encoding and decoding, particularly a 3D or stereo image. Video data signals are encoded such that the encoded video data signal comprises at least a primary and at least a secondary video data signal. The primary and secondary video data signals are jointly compressed. The primary video data signal is compressed in an independent manner, and the secondary video data signal is compressed using data from the primary video data signal. The jointly compressed video data signal is split into two separate bitstreams, wherein the bitstreams comprise a primary bistream comprising data for the primary video data signal and a secondary bitstream comprising data for the secondary video data signal; the primary and secondary bitstreams are then multiplexed into a multiplexed signal, and the primary and secondary signals are provided with separate codes (0x1B, 0x20). |
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Reporting and using chroma sample position information Invention encoding and decoding digital media data. Disclosed is a method of encoding digital image data with chroma position information which contains defined rules for reporting and interpreting chroma position. A short rule defines 15 discrete chroma centring positions and a corresponding 4-bit syntax element. An extended rule defines 81 discrete chroma centring positions and corresponding 7-bit syntax elements. The disclosed method includes receiving digital media data by a digital media encoder, determining chroma position information for the received digital media data, and representing the chroma position information with one or more syntax elements in an encoded bitstream. The one or more syntax elements are capable of reporting the chroma position information to a digital media decoder, and the chroma position information facilitates an image rotation or flip. |
Another patent 2528491.