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    Comparing video encoders/decoders using shot-based encoding and a perceptual visual quality metric
    11.
    发明授权
    Comparing video encoders/decoders using shot-based encoding and a perceptual visual quality metric 有权

    公开(公告)号：US11825029B2

    公开(公告)日：2023-11-21

    申请号：US17516525

    申请日：2021-11-01

    Applicant: NETFLIX, INC.

    Inventor： Ioannis Katsavounidis ,  Liwei Guo

    IPC: H04N19/196 ,  H04N19/85

    CPC classification number: H04N19/196 ,  H04N19/85

    Abstract: In various embodiments, an encoder comparison application compares the performance of different configured encoders. In operation, the encoder comparison application generates a first global convex hull of video encode points based on a first configured encoder and a set of subsequences included in a source video sequence. Each video encode point is associated with a different encoded version of the source video sequence. The encoder comparison application also generates a second global convex hull of video encode points based on a second configured encoder and the subsequences. Subsequently, the encoder configuration application computes a performance value for an encoding comparison metric based on the first global convex hull and the second global convex hull. Notably, the first performance value estimates a difference in performance between the first configured encoder and the second configured encoder.

    Temporal placement of a rebuffering event
    12.
    发明授权
    Temporal placement of a rebuffering event 有权

    公开(公告)号：US11388472B2

    公开(公告)日：2022-07-12

    申请号：US17243389

    申请日：2021-04-28

    Applicant: Netflix, Inc.

    Inventor： Ioannis Katsavounidis ,  Mark Watson ,  Aaron Hipple ,  Will Wolcott

    IPC: H04N21/234 ,  H04N21/44 ,  G06F16/783 ,  H04N21/432 ,  H04N21/433 ,  H04N21/61

    Abstract: A method includes receiving, with a computing system, data representing a video item into a buffer. The method further includes outputting the video item from the buffer to a display system. The method further includes determining that utilization of the buffer falls below a predetermined threshold. The method further includes, in response to determining that the utilization of the buffer falls below the predetermined threshold, determining that there is a specified rebuffering point within a predetermined time frame. The method further includes pausing with the computing system, the video item at the specified rebuffering point in response to determining that there is the specified rebuffering point within the predetermined time frame.

    Techniques for encoding a media title while constraining quality variations
    13.
    发明授权
    Techniques for encoding a media title while constraining quality variations 有权

    公开(公告)号：US11196790B2

    公开(公告)日：2021-12-07

    申请号：US17134069

    申请日：2020-12-24

    Applicant: NETFLIX, INC.

    Inventor： Ioannis Katsavounidis

    IPC: G06F15/16 ,  H04L29/06 ,  H04N19/154 ,  H04N19/176 ,  H04N19/59 ,  H04N19/87 ,  H04N21/238 ,  H04N21/2662

    Abstract: In various embodiments, a subsequence-based encoding application generates a convex hull of subsequence encode points based on multiple encoding points and a first subsequence included in a set of subsequences that are associated with a media title. The subsequence-based encoding application then generates a first encode list that includes multiple subsequence encode points based on the first convex hull. Notably, each subsequence encode point included in the first encode list is associated with a different subsequence. The subsequence-based encoding application selects a first subsequence encode point included in the first encode list based on a first variability constraint that is associated with a media metric. The subsequence-based encoding application then replaces the first subsequence encode point included in the first encode list with a second subsequence encode point to generate a second encode list. Finally, the subsequence-based encoding application generates an encoded media sequence based on the second encode list.

    Comparing video encoders/decoders using shot-based encoding and a perceptual visual quality metric
    15.
    发明授权
    Comparing video encoders/decoders using shot-based encoding and a perceptual visual quality metric 有权

    公开(公告)号：US11166034B2

    公开(公告)日：2021-11-02

    申请号：US16543476

    申请日：2019-08-16

    Applicant: NETFLIX, INC.

    Inventor： Ioannis Katsavounidis ,  Liwei Guo

    IPC: H04N19/196 ,  H04N19/85

    Abstract: In various embodiments, an encoder comparison application compares the performance of different configured encoders. In operation, the encoder comparison application generates a first global convex hull of video encode points based on a first configured encoder and a set of subsequences included in a source video sequence. Each video encode point is associated with a different encoded version of the source video sequence. The encoder comparison application also generates a second global convex hull of video encode points based on a second configured encoder and the subsequences. Subsequently, the encoder configuration application computes a performance value for an encoding comparison metric based on the first global convex hull and the second global convex hull. Notably, the first performance value estimates a difference in performance between the first configured encoder and the second configured encoder.

    Encoding techniques for optimizing distortion and bitrate
    18.
    发明授权
    Encoding techniques for optimizing distortion and bitrate 有权

    公开(公告)号：US12255940B2

    公开(公告)日：2025-03-18

    申请号：US16053754

    申请日：2018-08-02

    Applicant: NETFLIX, INC.

    Inventor： Ioannis Katsavounidis

    IPC: H04N21/2343 ,  H04L43/16 ,  H04L65/612 ,  H04L65/70 ,  H04L65/75 ,  H04N19/132 ,  H04N19/147 ,  H04N19/179 ,  H04N19/33 ,  H04N21/234 ,  H04N21/2662

    Abstract: A shot analyzer varies the resolution when generating encoded video sequences for streaming. The shot analyzer generates a first encoded video sequence based on a first resolution and a source video sequence that is associated with a video title. The shot analyzer then determines a first encoded shot sequence from multiple encoded shot sequences included in the first encoded video sequence based on quality metric(s). The first encoded shot sequence is associated with a first shot sequence included in the source video sequence. Subsequently, the shot analyzer generates a second encoded shot sequence based on a second resolution and the first shot sequence. The shot analyzer generates a second encoded video sequence based on the first encoded video sequence and the second encoded shot sequence. At least a first portion of the second encoded video sequence is subsequently streamed to an endpoint device during playback of the video title.

    Optimizing encoding operations when generating encoded versions of a media title
    19.
    发明授权
    Optimizing encoding operations when generating encoded versions of a media title 有权

    公开(公告)号：US12200235B2

    公开(公告)日：2025-01-14

    申请号：US18486986

    申请日：2023-10-13

    Applicant: NETFLIX, INC.

    Inventor： Ioannis Katsavounidis ,  Anne Aaron ,  Jan De Cock

    IPC: H04N19/42 ,  H04N19/103 ,  H04N19/142 ,  H04N19/146 ,  H04N19/147 ,  H04N19/154 ,  H04N19/177 ,  H04N19/179

    Abstract: In various embodiments, a sequence-based encoding application partitions a set of shot sequences associated with a media title into multiple clusters based on at least one feature that characterizes media content and/or encoded media content associated with the media title. The clusters include at least a first cluster and a second cluster. The sequence-based encoding application encodes a first shot sequence using a first operating point to generate a first encoded shot sequence. The first shot sequence and the first operating point are associated with the first cluster. By contrast, the sequence-based encoding application encodes a second shot sequence using a second operating point to generate a second encoded shot sequence. The second shot sequence and the second operating point are associated with the second cluster. Subsequently, the sequence-based encoding application generates an encoded media sequence based on the first encoded shot sequence and the second encoded shot sequence.

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