Patents by Inventor Nathalie Cammas

Nathalie Cammas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9756357
    Abstract: A method and apparatus for encoding a sequence of images by predicting at least one current image by forward motion compensation from at least one reference image. Prediction implements, for at least one current block of the current image: forward projection of a block of the reference image on the current image, delivering a projected block at least partially overlapping the current block; partitioning the current block delivering a sub-block at least partially overlapped by at least one projected block; and at least one iteration of the following steps for at least one overlapped sub-block: checking that the overlapped sub-block complies with a predetermined allotting criterion; with a positive check, allotting, to the overlapped sub-block, one of the projected motion vectors; and with a negative check, and so long as a predetermined minimum size is not reached for the overlapped sub-block: partitioning of the overlapped sub-block.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: September 5, 2017
    Assignee: FRANCE TELECOM
    Inventors: Isabelle Amonou, Stéphane Pateux, Nathalie Cammas
  • Patent number: 9516331
    Abstract: A method and apparatus are provided for encapsulating a plurality of data substreams encoded in a bit stream, wherein the encoded data substream is obtained by entropy encoding of a symbol subsequence representing an image or a series of images. The method includes grouping data substreams into substream pairs according to an iterative traversal order predetermined from the plurality of substreams, and on the basis of a pair of the substreams, obtaining a symmetrical pair by reversing a data order making up the second substream of the pair. The obtained pairs are then concatenated within a sequence. The binary stream is created by encapsulating the sequence and information related to a number of substreams and related to the sizes of pairs of symmetrical substreams.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: December 6, 2016
    Assignee: FRANCE TELECOM
    Inventors: Isabelle Amonou, Nathalie Cammas, Stéphane Pateux, Stéphanie Relier
  • Patent number: 9451280
    Abstract: A method and apparatus are provided for encoding an image sequence. The method includes the following steps, for at least one group of blocks of an image: determining, for each block, at least one parameter characteristic of said block; forming at least one cluster including the blocks having at least one similar characteristic parameter; encoding the blocks of said cluster, the similar characteristic parameter(s) associated with said cluster being encoded only once; encoding the blocks that do not belong to any cluster, the characteristic parameter(s) associated with each of said blocks not being encoded; generating a data stream; and inserting into said stream, at least one piece of information on the partitioning of the group(s), in order to identify the outer block(s) within a group.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: September 20, 2016
    Assignee: FRANCE TELECOM
    Inventors: Nathalie Cammas, Isabelle Amonou, Stéphane Pateux
  • Patent number: 9338466
    Abstract: A method is provided for coding an image sequence, including splitting a current image into blocks of standard size, termed macroblocks. For at least one current macroblock of the current image, the method further includes: constructing at least one block of greater size than the current macroblock, termed a large block, which includes the current macroblock and at least one neighbor macroblock in the current image, taking account of characteristics of the current image; coding the large block, delivering base coding information, making it possible to reconstruct a base layer of said current image, and for at least one large block, determining enhancement information associated with at least one macroblock present in the large block.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: May 10, 2016
    Assignee: FRANCE TELECOM
    Inventors: Nathalie Cammas, Stéphane Pateux, Isabelle Amonou, Sylvain Kervadec
  • Patent number: 9287894
    Abstract: A method is provided for encoding an image represented by a sequence of symbols. The method includes the following steps: defining subsequences within the sequence; and going through the subsequences applying the following sub-steps for a routine subsequence: determining an adjacent routine encoded group including two previously encoded subsequences, one of which belongs to an adjacent encoded group associated with a subsequence that is separate from the routine subsequence; initializing a routine probability of occurrence of a symbol, taking into account two known probabilities of occurrence of the symbol, relating to two previously encoded subsequences of the adjacent routine encoded group; the consecutive entropic encoding of the symbols, and updating the routine probability of occurrence; and storing the routine probability of occurrence after encoding the last symbol.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: March 15, 2016
    Assignee: ORANGE
    Inventors: Stephane Pateux, Isabelle Amonou, Nathalie Cammas
  • Patent number: 9106910
    Abstract: A method and apparatus are provided for coding a signal from images, the images being split into sub-blocks of pixels. The method includes grouping at least two sub-blocks into at least one block of larger size, when the sub-blocks comply with at least one predetermined grouping criterion. A prediction is performed by applying at least one mode of motion prediction using at least two distinct motion prediction vectors, for at least one block of larger size, the motion prediction vectors being associated respectively with sub-sets of the block of larger size, comprising at least one of the sub-blocks of the block of larger size. The sub-sets are predefined and distinct.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: August 11, 2015
    Assignee: ORANGE
    Inventors: Stéphane Pateux, Nathalie Cammas, Isabelle Amonou
  • Patent number: 9066107
    Abstract: A method is provided for encoding an image sequence, including the step of dividing a reference image into blocks and a prediction step that includes the following steps: determining monitoring vectors associated with a common image and dividing the same into sub-blocks defining a first partition; determining monitoring vectors associated with an image to be compensated and dividing the same into sub-blocks defining a first partition obtaining a common partitioning into basic sub-blocks; determining first and second sets of monitoring vectors for the basic sub-blocks; movement-compensating a sub-block of the image to be compensated towards a sub-block of the common image.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: June 23, 2015
    Assignee: France Telecom
    Inventors: Stephane Pateux, Nathalie Cammas
  • Patent number: 9055294
    Abstract: A method is provided for encoding at least one image, divided into macroblocks, one macroblock including a set of blocks de pixels. The method includes, for at least one current macroblock of a current image, at least two iterations of the following steps: allocation of a priority level for encoding to at least one pixel of the current macroblock, selection of a pixel with the highest priority level called the priority pixel, prediction of a set of pixels including the priority pixel and a step of encoding a remainder from prediction for a region made up of predicted pixels of the macroblock, called the predicted region, the encoding step being used as and when the predicted region meets a predetermined encoding criterion.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: June 9, 2015
    Assignee: France Telecom
    Inventors: Isabelle Amonou, Matthieu Moinard, Nathalie Cammas
  • Patent number: 9055293
    Abstract: A method is provided for predicting an image by compensation during forward movement from at least one reference image. For at least one block of a reference image, referred to as a reference block, the prediction method includes the following steps: determining at least one piece of movement information, representing a movement between said reference block and a matching block in the image to be predicted; determining at least one enlarged block, including the reference block and at least one point of a block adjacent to said reference block in the reference image; and determining a prediction value for at least one point of the image to be predicted from the at least one enlarged block and from the movement information determined for the reference block.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: June 9, 2015
    Assignee: FRANCE TELECOM
    Inventors: Stéphane Pateux, Nathalie Cammas
  • Patent number: 8971648
    Abstract: A method and apparatus are provided for coding an image or a sequence of images, generating a data stream including data representative of pixel groups, referred to as blocks, in one of the images. The method includes: grouping blocks in a cluster of blocks according to the proximity of their respective values corresponding to at least one block parameter to be coded; determining a value of the parameter, the value being characteristic of said group of blocks; coding blocks of the cluster, where the values of the blocks for the parameter are coded implicitly by inheritance of the characteristic value or are coded as refinements relative to the characteristic value, and coding a data structure associated with the cluster of blocks, the data structure including data associated with the characteristic value.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: March 3, 2015
    Assignee: Orange
    Inventors: Isabelle Amonou, Stephane Pateux, Nathalie Cammas, Sylvain Kervadec
  • Patent number: 8917945
    Abstract: A method and apparatus are provided for coding an image or a sequence of images, generating a data stream including data representative of pixel groups, referred to as blocks, in one of the images. The method includes: grouping blocks in a cluster of blocks according to the proximity of their respective values corresponding to at least one block parameter to be coded; determining a value of the parameter, the value being characteristic of said group of blocks; coding blocks of the cluster, where the values of the blocks for the parameter are coded implicitly by inheritance of the characteristic value or are coded as refinements relative to the characteristic value, and coding a data structure associated with the cluster of blocks, the data structure including data associated with the characteristic value.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: December 23, 2014
    Assignee: Orange
    Inventors: Isabelle Amonou, Stephane Pateux, Nathalie Cammas, Sylvain Kervadec
  • Patent number: 8855206
    Abstract: A method and apparatus are provided for coding a sequence of images. The method includes a step of coding at least one block of a current image of the sequence, implementing a prediction associating the block with at least one corresponding block in a reference image. The prediction includes the following steps, for at least one given block of the current image or of the reference image: determination of a plurality of control vectors for the block; at least one splitting of the block into sub-blocks; determination of a plurality of control vectors for the sub-blocks; and determination of a prediction value for at least one point of the current image. Moreover, the method includes a step of inserting, into a signal representative of the sequence, information regarding reconstruction of the control vectors for the given block.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: October 7, 2014
    Assignee: France Telecom
    Inventors: Stéphane Pateux, Isabelle Amonou, Nathalie Cammas, Sylvain Kervadec
  • Publication number: 20140269925
    Abstract: A method and apparatus are provided for coding an image or a sequence of images, generating a data stream including data representative of pixel groups, referred to as blocks, in one of the images. The method includes: grouping blocks in a cluster of blocks according to the proximity of their respective values corresponding to at least one block parameter to be coded; determining a value of the parameter, the value being characteristic of said group of blocks; coding blocks of the cluster, where the values of the blocks for the parameter are coded implicitly by inheritance of the characteristic value or are coded as refinements relative to the characteristic value, and coding a data structure associated with the cluster of blocks, the data structure including data associated with the characteristic value.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: France Telecom
    Inventors: Isabelle Amonou, Stephane Pateux, Nathalie Cammas, Sylvain Kervadec
  • Publication number: 20140269900
    Abstract: A method and apparatus are provided for coding an image or a sequence of images, generating a data stream including data representative of pixel groups, referred to as blocks, in one of the images. The method includes: grouping blocks in a cluster of blocks according to the proximity of their respective values corresponding to at least one block parameter to be coded; determining a value of the parameter, the value being characteristic of said group of blocks; coding blocks of the cluster, where the values of the blocks for the parameter are coded implicitly by inheritance of the characteristic value or are coded as refinements relative to the characteristic value, and coding a data structure associated with the cluster of blocks, the data structure including data associated with the characteristic value.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: France Telecom
    Inventors: Isabelle Amonou, Stephane Pateux, Nathalie Cammas, Sylvain Kervadec
  • Patent number: 8787685
    Abstract: A method and apparatus are provided for coding an image or a sequence of images, generating a data stream including data representative of pixel groups, referred to as blocks, in one of the images. The method includes: grouping blocks in a cluster of blocks according to the proximity of their respective values corresponding to at least one block parameter to be coded; determining a value of the parameter, the value being characteristic of said group of blocks; coding blocks of the cluster, where the values of the blocks for the parameter are coded implicitly by inheritance of the characteristic value or are coded as refinements relative to the characteristic value, and coding a data structure associated with the cluster of blocks, the data structure including data associated with the characteristic value.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: July 22, 2014
    Assignee: France Telecom
    Inventors: Isabelle Amonou, Stephane Pateux, Nathalie Cammas, Sylvain Kervadec
  • Patent number: 8761250
    Abstract: The invention concerns a method which consists in analyzing a field of motion of images, estimated by using a first mesh, to detect a faulty area in the first mesh, and in locating a rupture line in said area; then generating a second mesh including a faultless part consisting of meshes of the first mesh outside the faulty area and two sub-meshes which overlap in a region including the rupture line. Each of the two sub-meshes includes respective meshes delimited by nodes including nodes shared with the faultless part, located at the boundary of the faulty area, and additional nodes not belonging to the faultless part, the rupture line being located between the respective nodes of the two sub-meshes shared with the faultless part. Said second mesh is used to finally estimate the field of motion in the group of images concerned.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: June 24, 2014
    Assignee: Orange
    Inventors: Nathalie Cammas, Stéphane Pateux, Nathalie Laurent-Chatenet
  • Patent number: 8588292
    Abstract: 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.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: November 19, 2013
    Assignee: France Telecom
    Inventors: Stéphane Pateux, Benjamin Le Guen, Nathalie Cammas, Isabelle Amonou, Sylvain Kervadec
  • Patent number: 8483493
    Abstract: 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.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: July 9, 2013
    Assignee: France Telecom
    Inventors: Isabelle Amonou, Nathalie Cammas, Sylvain Kervadec, Stephane Pateux
  • Patent number: 8422805
    Abstract: A 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, the method including 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 the associated parameter for at least one block of the at least one group of blocks a second value, so that for the at least one block, the first and second values given for the parameter can be combined during decoding to provide a value assigned to the parameter.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: April 16, 2013
    Assignee: France Telecom
    Inventors: Isabelle Amonou, Stephane Pateux, Sylvain Kervadec, Nathalie Cammas
  • Publication number: 20130034163
    Abstract: A method and apparatus for encoding a sequence of images by predicting at least one current image by forward motion compensation from at least one reference image. Prediction implements, for at least one current block of the current image: forward projection of a block of the reference image on the current image, delivering a projected block at least partially overlapping the current block; partitioning the current block delivering a sub-block at least partially overlapped by at least one projected block; and at least one iteration of the following steps for at least one overlapped sub-block: checking that the overlapped sub-block complies with a predetermined allotting criterion; with a positive check, allotting, to the overlapped sub-block, one of the projected motion vectors; and with a negative check, and so long as a predetermined minimum size is not reached for the overlapped sub-block: partitioning of the overlapped sub-block.
    Type: Application
    Filed: March 29, 2011
    Publication date: February 7, 2013
    Applicant: FRANCE TELECOM
    Inventors: Isabelle Amonou, Stephane Pateux, Nathalie Cammas