公开(公告)号：US20220191119A1

公开(公告)日：2022-06-16

申请号：US17689864

申请日：2022-03-08

Applicant: NETFLIX, INC.

Inventor： David BANNISTER ,  Rafael RODRIGUEZ

IPC: H04L43/0864 ,  H04B10/27 ,  H04L41/06 ,  H04L43/10 ,  H04L69/16

Abstract: In various embodiments, a monitoring application assesses delays associated with a circuit within a network. The monitoring application determines a measured trip time between a first device and a second device that is connected to the first device via the circuit. The measured trip time is associated with a first variance attributable to the first device. The monitoring application performs one or more digital signal processing operations based on the measured trip time to generate a predicted trip time. The predicted trip time is associated with a second variance attributable to the first device that is less than the first variance. Based on the predicted trip time, the monitoring application determines characteristic(s) of the delay associated with the circuit. Advantageously, reducing variations attributable to the first device when generating the first predicted trip time increases the accuracy with which the monitoring application can determine the characteristic(s) of the delay.

公开(公告)号：US11361416B2

公开(公告)日：2022-06-14

申请号：US16352757

申请日：2019-03-13

Applicant: NETFLIX, INC.

Inventor： Christos Bampis ,  Zhi Li ,  Lavanya Sharan ,  Julie Novak ,  Martin Tingley

IPC: H04N19/154 ,  G06T7/00 ,  G06K9/62 ,  G06N20/20 ,  H04N21/25 ,  H04N19/147 ,  H04N17/00

Abstract: In various embodiments, an encoding metric comparison application computes a first set of quality scores associated with a test encoding configuration based on a set of bootstrap quality models. Each bootstrap quality model is trained based on a different subset of a training database. The encoding metric comparison application computes a second set of quality scores associated with a reference encoding configuration based on the set of bootstrap quality models. Subsequently, the encoding metric comparison application generates a distribution of bootstrap values for an encoding comparison metric based on the first set of quality scores and the second set of quality scores. The distribution quantifies an accuracy of a baseline value for the encoding comparison metric generated by a baseline quality model.

公开(公告)号：US11349699B2

公开(公告)日：2022-05-31

申请号：US13838059

申请日：2013-03-15

Applicant: NETFLIX, Inc

Inventor： Mark Watson ,  Anthony Neal Park ,  Wei Wei

IPC: H04L29/06 ,  G06F21/10 ,  H04L65/60

Abstract: Techniques are disclosed for improving user experience of multimedia streaming over computer networks. For example, a method for presenting multimedia content may generally include receiving a request to stream a media title. In response to the request, unencrypted content for the media title is streamed to a client. While streaming the unencrypted content, a digital rights management (DRM) license to access encrypted content for the media title is requested. After receiving the DRM license, the client switches from streaming the unencrypted content for the media title to streaming encrypted content for the media title. The switching from streaming the unencrypted content to streaming the encrypted content does not interrupt playback of the media title.

公开(公告)号：US20220166990A1

公开(公告)日：2022-05-26

申请号：US17516525

申请日：2021-11-01

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.

公开(公告)号：US11341316B2

公开(公告)日：2022-05-24

申请号：US16737645

申请日：2020-01-08

Applicant: NETFLIX, INC.

Inventor： Aditya Mavlankar

IPC: G06F40/146 ,  G06T7/00 ,  H04N19/103 ,  H04N19/154

Abstract: In various embodiments, an image encoding application determines a first value for an encoding parameter based on a search interval. The image encoding application then encodes a source image using the first value for the encoding parameter to generate a first encoded image. Subsequently, the image encoding application computes a visual quality score for a first reconstructed source image derived from the first encoded image. The image encoding application reduces the search interval based on a comparison between the visual quality score and the target visual quality score. Based on the resulting reduced search interval, the image encoding application determines a second value for the encoding parameter. The image encoding application encodes the source image using the second value for the encoding parameter to generate a second encoded image. Subsequently, the image encoding application transmits the second encoded image to software application(s) for further processing and display.

公开(公告)号：US20220123934A1

公开(公告)日：2022-04-21

申请号：US17071978

申请日：2020-10-15

Applicant: NETFLIX, INC.

Inventor： Andrew CHEN ,  Jonathan T. LOONEY

IPC: H04L9/32 ,  H04L29/06 ,  H04L9/08

Abstract: In various embodiments, servers in a server pool share a centrally-generated encryption key that is used to encrypt session keys in tickets that can be used by client applications to share secure communication sessions across different servers belonging to the same server pools. When the client application first establishes a secure communication session with a server in a server pool, the server returns a ticket that includes an encrypted version of a session key generated using an encryption key shared by servers in the server pool. Thereafter, the client application can present the ticket to other servers in the server pool to restore the secure communication session with the other servers. Associations between servers and server pools can be communicated to the client application in any technically feasible manner, such as part of information indicating servers from which content can be accessed or via the Domain Name System (DNS).

公开(公告)号：US20220115030A1

公开(公告)日：2022-04-14

申请号：US17555175

申请日：2021-12-17

Applicant: Netflix, Inc.

Inventor： Yadong Wang ,  Shilpa Jois Rao ,  Murthy Parthasarathi ,  Kyle Tacke

IPC: G10L25/51 ,  G10L15/00 ,  G10L15/22 ,  G10L25/81 ,  G10L25/84

Abstract: The disclosed computer-implemented method may include obtaining an audio sample from a content source, inputting the obtained audio sample into a trained machine learning model, obtaining the output of the trained machine learning model, wherein the output is a profile of an environment in which the input audio sample was recorded, obtaining an acoustic impulse response corresponding to the profile of the environment in which the input audio sample was recorded, obtaining a second audio sample, processing the obtained acoustic impulse response with the second audio sample, and inserting a result of processing the obtained acoustic impulse response and the second audio sample into an audio track. Various other methods, systems, and computer-readable media are also disclosed.

公开(公告)号：US20220103869A1

公开(公告)日：2022-03-31

申请号：US17549793

申请日：2021-12-13

Applicant: NETFLIX, INC.

Inventor： Zhi LI

IPC: H04N19/86

Abstract: In various embodiments, a tunable VMAF application reduces an amount of influence that image enhancement operations have on perceptual video quality estimates. In operation, the tunable VMAF application computes a first value for a first visual quality metric based on reconstructed video content and a first enhancement gain limit. The tunable VMAF application computes a second value for a second visual quality metric based on the reconstructed video content and a second enhancement gain limit. Subsequently, the tunable VMAF application generates a feature value vector based on the first value for the first visual quality metric and the second value for the second visual quality metric. The tunable VMAF application executes a VMAF model based on the feature value vector to generate a tuned VMAF score that accounts, at least in part, for at least one image enhancement operation used to generate the reconstructed video content.

公开(公告)号：US20220060771A1

公开(公告)日：2022-02-24

申请号：US17001063

申请日：2020-08-24

Applicant: NETFLIX, INC.

Inventor： SEKWON CHOI ,  ANDREW CHEN

IPC: H04N21/258 ,  H04L29/12 ,  H04L29/06 ,  H04L29/08

Abstract: In various embodiments, a client application requests information relating to content servers from which particular content can be accessed, or a manifest server that maintains such information and is distinct from the Domain Name System (DNS) automatically determines that the client application is likely to request the content server information. The manifest server then transmits, to the client application, information specifying (1) hostnames associated with the content servers from which the particular content can be accessed, and (2) Internet Protocol (IP) addresses corresponding to the hostnames. Thereafter, the client application can use the IP addresses to connect to the content servers and validate certificates provided by the content servers, in order to establish secure communication channels with the content servers.

公开(公告)号：US20220038710A1

公开(公告)日：2022-02-03

申请号：US16945737

申请日：2020-07-31

Applicant: NETFLIX, INC.

Inventor： Zhi LI

IPC: H04N19/149 ,  H04N19/154 ,  H04L29/06

Abstract: In various embodiments, a data optimization application mitigates scoring inaccuracies in subjective quality experiments. In operation, the data optimization application generates a model that includes a first set of individual scores and a first set of parameters. The first set of parameters includes a first subjective score set and a first set of subjective factor sets. The data optimization application performs one or more optimization operations on the first set of parameters to generate a second set of parameters. The second set of parameters includes a second subjective score set and a second set of subjective factor sets, wherein the second subjective score set compensates for at least a first subjective factor set included in the second set of subjective factor sets. The data optimization application also computes a participant evaluation report based on at least a second subjective factor sets included in the second set of subjective factor sets