公开(公告)号：US20240422369A1

公开(公告)日：2024-12-19

申请号：US18336577

申请日：2023-06-16

Applicant: Google LLC

Inventor： Yilin Wang ,  Miao Yin ,  Qifei Wang ,  Boqing Gong ,  Neil Aylon Charles Birkbeck ,  Balineedu Chowdary Adsumilli

IPC: H04N21/2343 ,  G06T7/00 ,  H04N19/132 ,  H04N21/466 ,  H04N21/485

Abstract: A method for generating, for a video stream of a first spatial resolution and a first temporal resolution, a first reduced quality steam of a second spatial resolution and a second reduced-quality stream of a second temporal resolution. A first subset of STPs is sampled from the first reduced-quality stream and a second subset of STPs is sampled from the second reduced-quality stream. Using a machine learning model (MLM) the STPs are processed to identify a quality score for each quality-representative STPs that are representative of a quality of the video stream. One or more quality-improving actions for the video stream are identified using the quality scores of the quality-representative STPs.

公开(公告)号：US20240373090A1

公开(公告)日：2024-11-07

申请号：US18143057

申请日：2023-05-03

Applicant: Google LLC

Inventor： Yeping Su ,  Neil Aylon Charles Birkbeck ,  Balineedu Chowdary Adsumilli

IPC: H04N21/4402

Abstract: A method includes receiving, by a user device, a first bitstream. The first bitstream includes data corresponding to a media item. The first bitstream includes data for display at a first aspect ratio. The method further includes receiving a second bitstream including data corresponding to the media item for display at a second aspect ratio. The method further includes providing the first bitstream to a first bitstream decoder and the second bitstream to a second bitstream decoder. Operations of the first bitstream decoder and operations of the second bitstream decoder overlap in time. The method further includes determining whether to display the media item at the first or the second aspect ratio. The method further includes generating a composited media item based on the first bitstream and the second bitstream. The method further includes displaying the composited media item.

公开(公告)号：US20230054130A1

公开(公告)日：2023-02-23

申请号：US17790102

申请日：2019-12-31

Applicant: GOOGLE LLC

Inventor： Yilin Wang ,  Yue Guo ,  Balineedu Chowdary Adsumilli

IPC: H04N21/2343 ,  H04N19/154 ,  H04N19/40

Abstract: A system and methods are disclosed for optimal format selection for video players based on visual quality. The method includes generating a plurality of reference transcoded versions of a reference video, obtaining quality scores for frames of the plurality of reference transcoded versions of the reference video, generating a first training input comprising a set of color attributes, spatial attributes, and temporal attributes of the frames of the reference video, and generating a first target output for the first training input, wherein the first target output comprises the quality scores for the frames of the plurality of reference transcoded versions of the reference video. The method further includes providing the training data to train a machine learning model on (i) a set of training inputs comprising the first training input and (ii) a set of target outputs comprising the first target output.