Patent application number | Description | Published |
20080291996 | Method of and Device for Coding a Video Image Sequence in Coefficients of Sub-Bands of Different Spatial Resolutions - A video image sequence including coefficients of frequency sub-bands with different spatial resolutions is coded. A data stream including at least one restitution level (Niv N−2, Niv N−1, Niv N) is formed. The restitution levels have coefficients of frequency sub-bands whose spatial resolution equals a spatial resolution of the restitution level. There are inserted, in at least one restitution level, coefficients of frequency sub-bands with a spatial resolution higher than the spatial resolution or resolutions of the restitution level. | 11-27-2008 |
20080310497 | Method For Filtering, Transmitting and Receiving Scalable Video Streams, and Corresponding Programs, Server, Intermediate Node and Terminal - A method is provided for filtering a scalable video stream, organized in the form of data unit blocks, each of which comprises a base data unit and a set of data units distributed according to two types of enhancement data, corresponding respectively to time and/or space and/or quality characteristics and making it possible to define several quality levels. The method defines at least two distinct filtering profiles, or paths of each block data units, wherein each path defines a row of successive foldover positions and each foldover position uses at least by one less data units than a previous position, and selects one of the paths according to a predetermined criterion, taking into account the type of content of the stream and/or at least one information item representing the capacities of a terminal receiving the stream. | 12-18-2008 |
20090016434 | DEVICE AND METHOD FOR SCALABLY ENCODING AND DECODING AN IMAGE DATA STREAM, A SIGNAL, COMPUTER PROGRAM AND AN ADAPTATION MODULE FOR A CORRESPONDING IMAGE QUALITY - A method is provided for encoding a sequence of images generating a data stream in the form of a structure of embedded data layers of n successive levels each of which corresponds to the predetermined resolution of said images. Said method comprises an encoding stage, which encodes at least one of said layers of an n+1 level by prediction on the basis of said level n layer and encodes each data layer of the level n in the form of a base sub-stream and, optionally, in the form of at least one enhancement sub-stream enabling to obtain at least one version of the enhanced quality of said images. The method also encodes, for at least one data layer of the n level, at least one single sub-stream enabling to reconstruct the version of said images at said level n resolution with a quality higher than said enhanced qualities, wherein said single sub-steam of the level n layer is not used during the prediction encoding of the layers of a level other than the level n. | 01-15-2009 |
20090219988 | METHODS OF ENCODING AND DECODING AN IMAGE OR A SEQUENCE OF IMAGES, CORRESPONDING DEVICES, COMPUTER PROGRAM AND SIGNAL - A method is provided of coding an image or a sequence of images, generating a data stream, each image being split into at least two images blocks, wherein each of which is associated a transformed block comprising a set of coefficients. The coefficients of a transformed block are distributed into group(s) of coefficients according to a predetermined path for reading the transformed blocks. The method includes, for each of the transformed blocks: a step of coding a series of coefficients corresponding to at least one group of coefficients, the series being determined on the basis of a type of series of coefficients that is selected from at least two possible types, and a step of inserting into the data stream a cue representative of the type of series of coefficients that is selected for the image or the sequence of images, or for a portion of the image. | 09-03-2009 |
20100150224 | METHOD AND DEVICE FOR CODING DATA IN A SCALABLE STREAM - The invention relates to a method of and a device for coding data in a scalable stream organized in units, characterized in that an indication is given in the header of an SVC NAL unit as to whether this NAL unit can be truncated or not in an adaptation operation for the scalable stream concerned | 06-17-2010 |
20100189172 | METHODS AND DEVICES FOR CODING AND DECODING AN IMAGE SEQUENCE REPRESENTED WITH THE AID OF MOTION TUBES, CORRESPONDING COMPUTER PROGRAM PRODUCTS AND SIGNAL - A method and apparatus are provided for decoding a signal representative of an image sequence. The method includes extracting motion tubes from the signal, each of the tubes being defined by at least the following information cues: a block of reference pixels comprising reference texture information cues; start-of-tube and end-of-tube instants; and transition information cues. The method further includes processing the transition information cues and combining the information cues associated with the current blocks of at least two of the tubes overlapping in an overlap zone of the current image. | 07-29-2010 |
20100278444 | METHOD FOR THE VARIABLE-COMPLEXITY DECODING OF AN IMAGE SIGNAL, CORRESPONDING DECODING TERMINAL, ENCODING METHOD, ENCODING DEVICE, COMPUTER SIGNAL AND PROGRAMS - A method is provided decoding a digital image signal in a decoding terminal that uses a variable-complexity decoding, enabling, for at least one step in the decoding, selection of at least one decoding tool from at least two available decoding tools. The method includes the following steps: identifying from the images control images and intermediate images; applying to each of the control images, for at least one step of the decoding, at least one predetermined decoding tool imposed by the signal; applying to at least one of the intermediate images, for at least one step of the decoding, at least one decoding tool selected by the decoding terminal and not imposed by the signal. | 11-04-2010 |
20100322529 | Device And Method For Scalable Encoding And Decoding Of Image Data Flow And Corresponding Signal And Computer Program - Method of coding an image or a sequence of images generating a flow of data in the form of groups of blocks, at least one group of blocks containing image blocks having a resolution and a quality level of identical quantification, characterized in that said method comprises at least the following steps for the at least one group of blocks, of a) a first coding so that each block of the at least one group of blocks has at least one associated parameter that is given a first value, and b) a second coding for giving said associated parameter for at least one block of said at least one group of blocks a second value, so that for said at least one bloc, the first and second values given for said parameter can be combined during decoding in order to provide a value assigned to said parameter. | 12-23-2010 |