公开(公告)号：US20220191584A1

公开(公告)日：2022-06-16

申请号：US17440686

申请日：2020-03-17

Applicant: ATEME ,  INSTITUT MINES TELECOM

Inventor： Eric TOULLEC ,  Lucas GREGORY ,  Jean LE FEUVRE

IPC: H04N21/43 ,  H04N21/2343 ,  H04N21/44 ,  H04N21/845

Abstract: Disclosed is a method for managing multimedia content, involving: obtaining a first set of content description metadata describing a first multimedia content broadcast in dynamic mode; and upon reading, in the first set of metadata, data redirecting to a section of a second set of content description metadata, reading, in the section of the second set of metadata, data relating to a time synchronization for accessing a second multimedia content broadcast in dynamic mode.

公开(公告)号：US11350104B2

公开(公告)日：2022-05-31

申请号：US16913329

申请日：2020-06-26

Applicant: ATEME

Inventor： Anne-Lyse Lavaud

IPC: H04N19/142 ,  H04N19/115 ,  H04N19/159

Abstract: Disclosed is a method, implemented by computer, for processing a video sequence including a set of images, which method includes: obtaining information indicating at least one image in the set of images to be encoded using a spatial correlation-based predictive coding mode, determining consecutive subsets of images in the set of images, and encoding the video sequence on the basis of the determined consecutive subsets of images, wherein the respective sizes of at least some of the subsets of images are dependent on the at least one image to be encoded using the spatial correlation-based predictive coding mode.

公开(公告)号：US20220141460A1

公开(公告)日：2022-05-05

申请号：US17517878

申请日：2021-11-03

Applicant: ATEME

Inventor： Anthony Nasrallah ,  Thomas Guionnet ,  Mohsen Abdoli ,  Marco Cagnazzo ,  Attilio Fiandrotti

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  G06T9/00 ,  G06N3/08

Abstract: A method of processing a first image in a first plurality of images, wherein the first image is divided into a plurality of pixel blocks, is proposed, which comprises, for a current block of the first image: selecting, in a set of a plurality of predefined interpolation filters, an interpolation filter based on a prediction of an interpolation filter determined by a supervised learning algorithm to which data related to the current block is input; and using the selected interpolation filter for calculating fractional pixel values in a second image of the plurality of images for a temporal prediction of pixels of the current block based on a reference block correlated to the current block in the second image, wherein the second image is distinct from the first image and was previously encoded according to an image encoding sequence for encoding the images of the plurality of images.

公开(公告)号：US20220038748A1

公开(公告)日：2022-02-03

申请号：US17390509

申请日：2021-07-30

Applicant: ATEME

Inventor： Thomas Guionnet ,  Sébastien Herbreteau

IPC: H04N19/85 ,  G06T5/00

Abstract: A method of processing an image is proposed, which includes: determining, based on the image, one or more noise templates, wherein each of the one or more noise templates includes noise pixels representing noise contained in the image; calculating one or more first autocovariance values, based on the noise pixels of at least one of the one or more noise templates; based on the one or more first autocovariance values, selecting an entry of a noise model database among database entries which respectively include values of noise model parameters corresponding to a noise model.

公开(公告)号：US20210344968A1

公开(公告)日：2021-11-04

申请号：US17307339

申请日：2021-05-04

Applicant: ATEME

Inventor： Thomas GUIONNET ,  Sébastien HERBRETEAU

IPC: H04N19/86 ,  H04N19/182 ,  G06T5/00 ,  G06T5/50

Abstract: A method of method of processing an image includes: determining estimates of parameters of an auto-regressive, AR, parametric model of noise contained in the image, according to which a current noise pixel is computed as a combination of a linear combination of P previous noise pixels in a causal neighborhood of the current noise pixel weighted by respective AR model linear combination parameters (φ1, . . . , φP) with a generated noise sample corresponding to an additive Gaussian noise of AR model variance parameter (σ), generating a noise template of noise pixels based on the estimated AR model parameters, wherein the noise template is of a predetermined pixel size smaller than the pixel size of the image, determining an estimate (σP) of a variance of the noise template, and based on a comparison of the estimated variance (σP) with a predetermined threshold (Tσ), correcting the AR model variance parameter (σ).

公开(公告)号：US20210343045A1

公开(公告)日：2021-11-04

申请号：US17307419

申请日：2021-05-04

Applicant: ATEME

Inventor： Thomas GUIONNET ,  Sébastien HERBRETEAU

IPC: G06T9/00 ,  G06T5/00 ,  H04N19/119 ,  H04N19/98 ,  H04N19/142 ,  H04N19/172

Abstract: A method of method of processing an image of a video sequence including a plurality of images, wherein the video sequence is divided into a sequence of consecutive subsets each including one or more consecutive images of the video sequence is provides, which includes: determining, among the consecutive subsets, a current subset that includes the image, upon determining that the image is a first image of the current subset to be processed, determining an analysis window corresponding to the current subset, wherein the analysis window includes a plurality of consecutive images of the video sequence, and includes at least one image of the current subset, and generating processing results for the image by performing a processing on the images of the analysis window.

公开(公告)号：US10911785B2

公开(公告)日：2021-02-02

申请号：US16196218

申请日：2018-11-20

Applicant: ATEME

Inventor： Elie Gabriel Mora

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/85 ,  H04N19/146 ,  H04N19/136 ,  H04N19/117 ,  H04N19/172 ,  H04N19/86 ,  H04N19/19 ,  H04N19/115 ,  H04N19/103 ,  H04N19/147

Abstract: A method for processing a video stream prior to encoding, the video stream potentially comprising a film grain, the method comprising: measuring a film grain intensity in the video stream; obtaining at least one encoding rate information item associated with the video stream, in order to determine a pair of respective values for the grain intensity and encoding rate; comparing the pair values with predetermined respective threshold values in order to categorize the video stream with respect to pairs of predetermined values of grain intensity and rate; and selecting a film grain management strategy among at least four combinations based on the categorization of the video stream.

公开(公告)号：US10742987B2

公开(公告)日：2020-08-11

申请号：US15569446

申请日：2016-04-20

Applicant: ATEME

Inventor： Pierre Larbier

IPC: H04N19/136 ,  H04N19/142 ,  H04N19/177 ,  H04N19/51 ,  H04N19/194 ,  H04N19/14 ,  H04N19/172 ,  H04N19/132 ,  H04N19/46

Abstract: Disclosed is a method for analyzing a set of images of a video sequence with a view to performing a processing of the sequence. The method includes: determining, in the video sequence, a plurality of disjointed consecutive sub-sequences of at least one successive image according to the type of processing to be carried out and according to the content of the video sequence; and analyzing the images of each sub-sequence determined in the video sequence.

公开(公告)号：US20200021808A1

公开(公告)日：2020-01-16

申请号：US16507606

申请日：2019-07-10

Applicant: ATEME

Inventor： Elie MORA

IPC: H04N19/117 ,  G06T5/00 ,  G06T5/50 ,  H04N19/154 ,  H04N19/172 ,  H04N19/196 ,  H04N19/80 ,  H04N19/139

Abstract: The disclosure relates to a method for processing the noise of a stream comprising a series of images, comprising spatial filtering of a current image In in order to obtain a spatially filtered image Sn; determining a motion vector for each block B of pixels of the image Sn, from a single image Sn-1; calculating a confidence index αn[B] for each block B of image In, from the motion vector determined for B; constructing a temporal filter from the calculated confidence indices αn[B] and applying the temporal filter to the current image In in order to obtain a temporally filtered image Tn; spatial filtering of the current image In in order to obtain a spatially filtered image Dn where Dn can be equal to Sn, and obtaining a temporally and spatially filtered image Rn by applying a function combining image Tn and image Dn.

公开(公告)号：US20190281337A1

公开(公告)日：2019-09-12

申请号：US16280459

申请日：2019-02-20

Applicant: ATEME

Inventor： Thomas Guionnet

IPC: H04N21/2662 ,  H04N21/2343 ,  H04N21/238

Abstract: A method, implemented by computer means, for digitally encoding multimedia content into one or more video streams for on-demand distribution to at least one receiving terminal, the method comprising the following steps: from a given set of profiles, each profile being characterized by a value of at least one encoding parameter, forming one or more ordered groups of profiles, it being possible for a same profile to be present in multiple groups, such that in each group, each profile and its immediate successor satisfy a first predetermined condition, and selecting from the formed groups at least one group of profiles satisfying a second predetermined condition.