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    Elementary bitstream cryptographic material transport systems and methods
    12.
    发明授权
    Elementary bitstream cryptographic material transport systems and methods 有权

    公开(公告)号：US10212486B2

    公开(公告)日：2019-02-19

    申请号：US15615626

    申请日：2017-06-06

    申请人： DIVX, LLC

    发明人： Francis Yee-Dug Chan ,  Kourosh Soroushian ,  Andrew Jeffrey Wood

    IPC分类号： H04L29/06 ,  H04N21/6334 ,  H04N21/235 ,  H04N21/236 ,  H04N21/434 ,  H04N21/4405 ,  H04N7/167 ,  H04N21/43

    摘要： Systems and methods for providing multimedia content from one process or component to another process or component over an unsecured connection are provided. One embodiment includes obtaining the cryptographic information, extracting the at least partially encrypted video data from the container file to create an elementary bitstream, enciphering the cryptographic information, inserting the cryptographic information in the elementary bitstream, providing the elementary bitstream to a video decoder, extracting the cryptographic information from the elementary bitstream at the video decoder, deciphering the cryptographic information, decrypting the elementary bitstream with the cryptographic information and decoding the elementary bitstream for rendering on a display device using the video decoder.

    System and Method for Decreasing an Initial Buffering Period of an Adaptive Streaming System
    14.
    发明申请
    System and Method for Decreasing an Initial Buffering Period of an Adaptive Streaming System 审中-公开

    公开(公告)号：US20180288498A1

    公开(公告)日：2018-10-04

    申请号：US15937715

    申请日：2018-03-27

    申请人： DIVX, LLC

    发明人： Abhishek Shivadas ,  Kourosh Soroushian

    IPC分类号： H04N21/845 ,  H04N21/442 ,  H04N21/2343 ,  H04L29/06 ,  H04N21/658

    摘要： System and methods for selecting one of the alternative streams of encoded media from a group of alternative streams of encoded media for use during start-up of playback of the encoded media in accordance with embodiments of this invention are disclosed. The systems and methods begin by determining an estimated stability period for a current bandwidth of a communicative connection between the playback device and a remote system providing the alternative streams of encoded. A test process is then performed on the streams of encoded media to select one of streams of encoded media that provides portions of said encoded media such that an underflow condition does not occur during the estimated stability period. The streaming of encoded media is then commenced by requesting the portions of encoded media be transmitted from the remote server using the selected stream.

    Systems and Methods for Encoding and Streaming Video Encoded Using a Plurality of Maximum Bitrate Levels
    15.
    发明申请
    Systems and Methods for Encoding and Streaming Video Encoded Using a Plurality of Maximum Bitrate Levels 审中-公开

    公开(公告)号：US20180278975A1

    公开(公告)日：2018-09-27

    申请号：US15922198

    申请日：2018-03-15

    申请人： DIVX, LLC

    发明人： Kourosh Soroushian

    IPC分类号： H04N21/2343 ,  H04N21/2662 ,  H04N19/115 ,  H04N19/157 ,  H04N19/146

    摘要： Systems and methods for streaming and playing back video having a variety of resolutions, frame rates, and/or sample aspect ratios, where the video streams are encoded at one of a number of maximum bit rate levels, in accordance with embodiments of the invention are disclosed. One embodiment includes a processor, and storage containing data relating combinations of resolution and frame rates to maximum bitrates, where a plurality of resolution and frame rates that are related to the same maximum bitrate form a maximum bitrate level. In addition, an encoding application configures the processor to encode a video stream as a plurality of video streams having different resolutions and frame rates, where the target maximum bitrate used during the encoding is selected based upon the maximum bitrate levels of the resolution and frame rate combinations indicated within the data relating combinations of resolution and frame rates to maximum bitrates.

    Selection of Resolutions for Seamless Resolution Switching of Multimedia Content
    18.
    发明申请
    Selection of Resolutions for Seamless Resolution Switching of Multimedia Content 有权

    公开(公告)号：US20210021662A1

    公开(公告)日：2021-01-21

    申请号：US17063439

    申请日：2020-10-05

    申请人： DIVX, LLC

    发明人： Kourosh Soroushian ,  Abhishek Shivadas

    IPC分类号： H04L29/06 ,  H04N21/2343 ,  H04N19/33

    摘要： Systems and methods for the selection of resolutions for seamless resolution switching of multimedia content in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, a source encoder includes a processor configured by a source encoder application to receive multimedia content, where the multimedia content comprises video data having a primary resolution and a primary sample aspect ratio and encode the video data as a set of alternative streams, where a plurality of the streams in the set of alternative streams have different maximum bitrates and resolutions, the resolution of each of the plurality of streams comprises a width and height that are both an integer number of pixels, and both the width and height of each of the plurality of streams is a common fraction of the width and height of the corresponding primary resolution.