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    Iterative techniques for generating multiple encoded versions of a media title
    23.
    发明授权
    Iterative techniques for generating multiple encoded versions of a media title 有权

    公开(公告)号：US11444999B2

    公开(公告)日：2022-09-13

    申请号：US16987331

    申请日：2020-08-06

    Applicant: NETFLIX, INC.

    Inventor： Ioannis Katsavounidis ,  Anne Aaron ,  Jan De Cock

    IPC: H04N19/147 ,  H04L65/70 ,  H04N19/146 ,  H04N19/179 ,  H04N19/132 ,  H04N19/124 ,  H04N19/115 ,  H04L65/61 ,  H04L65/612 ,  H04L65/75

    Abstract: In various embodiments, an iterative encoding application generates shot encode points based on a first set of encoding points and a first shot sequence associated with a media title. The iterative encoding application performs convex hull operations across the shot encode points to generate a first convex hull. Subsequently, the iterative encoding application generates encoded media sequences based on the first convex hull and a second convex hull that is associated with both a second shot sequence associated with the media title and a second set of encoding points. The iterative encoding application determines a first optimized encoded media and a second optimized encoded media sequence from the encoded media sequences based on, respectively, a first target metric value and a second target metric value for a media metric. Portions of the optimized encoded media sequences are subsequently streamed to endpoint devices during playback of the media title.

    Techniques for encoding a media title while constraining quality variations
    24.
    发明授权
    Techniques for encoding a media title while constraining quality variations 有权

    公开(公告)号：US11196791B2

    公开(公告)日：2021-12-07

    申请号：US17134072

    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.

    TEMPORAL PLACEMENT OF A REBUFFERING EVENT
    25.
    发明申请
    TEMPORAL PLACEMENT OF A REBUFFERING EVENT 有权

    公开(公告)号：US20210289258A1

    公开(公告)日：2021-09-16

    申请号：US17243389

    申请日：2021-04-28

    Applicant: Netflix, Inc.

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

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

    Determining native resolutions of video sequences
    26.
    发明授权
    Determining native resolutions of video sequences 有权

    公开(公告)号：US10140520B2

    公开(公告)日：2018-11-27

    申请号：US15676944

    申请日：2017-08-14

    Applicant: NETFLIX, INC.

    Inventor： Ioannis Katsavounidis

    IPC: G06K9/00 ,  G06K9/46 ,  H04N9/64 ,  H04N21/234 ,  H04N21/2662 ,  G11B27/28 ,  H04N21/2343 ,  H04N21/81 ,  G06K9/52

    Abstract: In one embodiment of the present invention, a native resolution analyzer generates a log-magnitude spectrum that elucidates sampling operations that have been performed on a scene. In operation, the native resolution analyzer performs a transform operation of a color component associated with a frame included in the scene to generate a frame spectrum. The native resolution analyzer then normalizes the magnitudes associated with the frame spectrum and logarithmically scales the normalized magnitudes to create a log-magnitude frame spectrum. This two dimensional log-magnitude frame spectrum serves as a frequency signature for the frame. More specifically, patterns in the log-magnitude spectrum reflect re-sampling operations, such as a down-sampling and subsequent up-sampling, that may have been performed on the frame. By analyzing the log-magnitude spectrum, discrepancies between the display resolution of the scene and the lowest resolution with which the scene has been processed may be detected in an automated fashion.

    Determining native resolutions of video sequences
    27.
    发明授权
    Determining native resolutions of video sequences 有权

    公开(公告)号：US09734409B2

    公开(公告)日：2017-08-15

    申请号：US14879053

    申请日：2015-10-08

    Applicant: NETFLIX, INC

    Inventor： Ioannis Katsavounidis

    IPC: G06K9/40 ,  G06K9/00 ,  G06K9/46 ,  H04N9/64 ,  H04N21/234 ,  H04N21/2662

    CPC classification number: G06K9/00765 ,  G06K9/4652 ,  G06K9/52 ,  G11B27/28 ,  H04N9/64 ,  H04N21/23418 ,  H04N21/234363 ,  H04N21/2662 ,  H04N21/81

    Abstract: In one embodiment of the present invention, a native resolution analyzer generates a log-magnitude spectrum that elucidates sampling operations that have been performed on a scene. In operation, the native resolution analyzer performs a transform operation of a color component associated with a frame included in the scene to generate a frame spectrum. The native resolution analyzer then normalizes the magnitudes associated with the frame spectrum and logarithmically scales the normalized magnitudes to create a log-magnitude frame spectrum. This two dimensional log-magnitude frame spectrum serves as a frequency signature for the frame. More specifically, patterns in the log-magnitude spectrum reflect re-sampling operations, such as a down-sampling and subsequent up-sampling, that may have been performed on the frame. By analyzing the log-magnitude spectrum, discrepancies between the display resolution of the scene and the lowest resolution with which the scene has been processed may be detected in an automated fashion.

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