At&t Intellectual Property I, LP

University of Michigan

At&t Mobility II LLC

At&t Mobolity II LLC

Shichang Xu

Subhabrata Bapi Sen

Eric Petajan

Zhuoqing Morley Mao

Emir Halepovic

A processing system may obtain a downscaled version of a reference copy of a video, comprising a plurality of downscaled versions of a plurality of frames of the reference copy of the video, obtain a first recorded frame of a first variant of a plurality of variants associated with the reference copy of the video, where the plurality of variants comprises a plurality of copies of the video encoded at different bitrates, generate a first downscaled version of the first recorded frame, calculate a first plurality of image distances between the first downscaled version of the first recorded frame and the plurality of downscaled versions of the plurality of frames of the reference copy of the video, and determine a first frame index of the first recorded frame in accordance with a first least image distance from among the first plurality of image distances that is calculated.

Adaptive bitrate video testing from screen recording

Aspects of the subject disclosure may include, for example, a method in which a processing system parses a network trace to collect packet information for an encrypted adaptive bite rate (ABR) video stream encoded into a plurality of tracks; detects request packets corresponding to a sequence of requests for video segments to be downloaded at a network client; and determines a traffic volume downloaded at the network client to obtain a sequence of traffic volumes. The processing system identifies, for each of the sequence of traffic volumes, a set of candidate segments each having a size meeting a size-matching criterion; selects a segment from the set of candidate segments to determine a segment sequence meeting an index-matching criterion; and infers characteristics of the sequence of traffic volumes based on the segment sequence. Other embodiments are disclosed.

Method and apparatus for inferring ABR video streaming behavior from encrypted traffic

A processing system may obtain a first frame of a first variant associated with a reference copy of a video, where a plurality of variants comprises copies of the video encoded at different bitrates, determine a frame number of the first frame from a visual overlay containing the first frame number, calculate a first image distance between the first frame and a frame of the reference copy having the frame number, determine, from among a plurality of image distances for frames of each variant having the frame number, a closest image distance to the first image distance, the plurality of image distances comprising image distances between frames of the variants and the frame of the reference copy having the frame number, and identify the first frame as being from the first variant in accordance with a variant associated with the first closest image distance.

Adaptive bitrate video testing

Aspects of the subject disclosure may include, for example, upon receiving a request for media content, a first signal quality may be determined, a first quality level may be selected based on the first signal quality, and segments of the first quality level may be retrieved, stored in a buffer, and played from the buffer. When the buffer is sufficiently occupied first inferior segments stored in the buffer may be replaced by determining a second signal quality selecting a second quality level based on the second signal quality, identifying the first inferior segment based on the second quality level, and replacing the first inferior segment with a first replacement segment, the first replacement segment corresponding to the first inferior segment. These processes may be performed iteratively. Other embodiments are disclosed.

Growing community of inventors

Ann Arbor, MI, United States of America

Shichang Xu