公开(公告)号：US20220070451A1

公开(公告)日：2022-03-03

申请号：US17409134

申请日：2021-08-23

Applicant: ATEME

Inventor： Mohsen ABDOLI

IPC: H04N19/11 ,  H04N19/186 ,  H04N19/176 ,  H04N19/119 ,  H04N19/136 ,  H04N19/159 ,  H04N19/593

Abstract: An image processing method includes: extracting from the image component images including first and second chroma component images; dividing each component image into component pixel block sets; and defining processing sequences of the component pixel blocks; for a current chroma component pixel block, performing intra mode prediction to obtain intra prediction modes for the current chroma component pixel block. The intra mode prediction method includes: determining an application area including a set of pixels in a pixel block of one of the component images. The pixel block has already been processed according to a respective processing sequence defined for the one of the component images, performing a gradient analysis on a pixel of the application area, selecting, based on results of the gradient analysis, a intra prediction video coding mode among intra prediction video coding modes usable for encoding and/or decoding the current chroma component pixel block.

公开(公告)号：US20200342578A1

公开(公告)日：2020-10-29

申请号：US16958935

申请日：2018-12-21

Applicant: ATEME

Inventor： Thomas GUIONNET

IPC: G06T5/00 ,  G06T5/50

Abstract: Disclosed is a method for processing a video stream including a set of images liable to contain a transition effect, the method including the following steps: detecting a fade-type transition effect within the set of images of the video stream and, where appropriate, calculating minimum and maximum brightnesses LMIN and LMAX for each image of the set of images containing the fade; estimating minimum and maximum brightnesses EMIN and EMAX for all of the images not containing the detected transition effect; determining minimum and maximum brightnesses SMIN and SMAX for a standard dynamic range; calculating minimum and maximum brightnesses TMIN and TMAX depending on the minimum and maximum brightnesses LMIN, LMAX, EMIN, EMAX, SMIN and SMAX calculated and determined beforehand; transmitting the calculated minimum and maximum brightnesses TMIN and TMAX with a view to dynamic range compression.

公开(公告)号：US10440384B2

公开(公告)日：2019-10-08

申请号：US15529031

申请日：2015-11-20

Applicant: ATEME

Inventor： Zineb Agyo ,  Mathieu Monnier ,  Jean-Marc Thiesse ,  Pierre Larbier

IPC: H04N19/139 ,  H04N19/52 ,  H04N19/147 ,  H04N19/11 ,  H04N19/109 ,  H04N19/19 ,  H04N19/573 ,  H04N19/154 ,  H04N19/176

Abstract: Disclosed is a method for encoding a first image in a set of images, in which the first image is cut into blocks, each block being encoded according to one from a plurality of encoding modes including at least one temporal correlation prediction encoding mode using a plurality of images from the set of images. The method includes, for a current block of the first image: determining a first motion estimation vector of the current block, determining a value of a visual distortion metric for a temporal correlation prediction encoding mode, the visual distortion metric using a distance between a first temporal prediction vector of the current block pointing to the second image and the first motion estimation vector of the current block, and using the value of the visual distortion metric to encode the current block.

公开(公告)号：US20190132616A1

公开(公告)日：2019-05-02

申请号：US16178879

申请日：2018-11-02

Applicant: ATEME

Inventor： Eric TOULLEC ,  Jerome VIERON

IPC: H04N21/2225 ,  H04N21/236 ,  H04N21/239

Abstract: A method for processing a multimedia content previously digitally encoded into an audio-video stream and transmitted from a distribution platform for the purposes of on-demand transmission to a plurality of receiving terminals includes the following steps: applying a demultiplexing function to the audio-video stream, said function being arranged to generate at least one group of data streams; applying a transformation to each data stream; segmenting each data stream; storing the at least one group of segmented data streams in a memory; carrying out, only in response to a request issued by a receiving terminal among the plurality of receiving terminals, the following steps: selecting, on the basis of the request, at least one data stream of at least one group of stored data streams; and transmitting the at least one selected data stream to the receiving terminal that issued the request.

公开(公告)号：US20170264914A1

公开(公告)日：2017-09-14

申请号：US15529031

申请日：2015-11-20

Applicant: ATEME

Inventor： Zineb AGYO ,  Mathieu MONNIER ,  Jean-Marc THIESSE ,  Pierre LARBIER

IPC: H04N19/52 ,  H04N19/154 ,  H04N19/19 ,  H04N19/176 ,  H04N19/109 ,  H04N19/11

CPC classification number: H04N19/52 ,  H04N19/109 ,  H04N19/11 ,  H04N19/139 ,  H04N19/147 ,  H04N19/154 ,  H04N19/176 ,  H04N19/19 ,  H04N19/573

Abstract: Disclosed is a method for encoding a first image in a set of images, in which the first image is cut into blocks, each block being encoded according to one from a plurality of encoding modes including at least one temporal correlation prediction encoding mode using a plurality of images from the set of images. The method includes, for a current block of the first image: determining a first motion estimation vector of the current block, determining a value of a visual distortion metric for a temporal correlation prediction encoding mode, the visual distortion metric using a distance between a first temporal prediction vector of the current block pointing to the second image and the first motion estimation vector of the current block, and using the value of the visual distortion metric to encode the current block.