Divx, LLC

Sonic Ip, Inc.

Mayur Srinivasan

Jason A Braness

William David Amidei

Hans Andreas Baumgartner

Stephen Bramwell

Giang Pham

Brian T Fudge

Roland Osborne

Aaron Robinson

Alexander Van Zoest

Kevin Fry

Systems and methods for partial frame encryption in accordance with embodiments of the invention are disclosed. In one embodiment, the method receives a video bitstream that includes several frames, each frame including several independently encoded compression units within the frame, encrypts a portion of each of several compression units in several frames, and generates an output bitstream that includes the several independently encoded compression units including the encrypted portions of the compression units.

Systems and methods for protecting elementary bitstreams incorporating independently encoded tiles

Systems and methods for adaptive switching between multiple content delivery networks during adaptive bitrate streaming. In one embodiment, an adaptive content delivery network switching device includes a processor, a network interface, and a memory connected to the processor, where the memory contains a content delivery network switching application and, the content delivery network switching application directs the processor to receive content from a first content delivery network, determine a minimum performance threshold based on playback variables from the received content, receive new content from a second content delivery network if the minimum performance threshold is not satisfied.

Systems and methods for adaptive switching between multiple content delivery networks during adaptive bitrate streaming

Systems and methods for binding content to pairing of a playback device and removable memory storage device are disclosed. In one embodiment, a method for requesting authorization to play content using a playback device and a removable memory storage device includes retrieving a coupon identifier from a removable memory storage device while it is attached to the playback device, generating a coupon code using the coupon identifier, sending a request for storefront token that includes a device match data token and an application identifier, receiving a storefront token associated with a storefront identifier where the storefront identifier identifies a storefront application, sending a request for ticket token that includes the coupon code, the storefront identifier, and a content identifier that identifies the content, sending a request for license file that includes the ticket token, and receiving a license file that grants playback rights to the piece of content.

Systems and methods for binding content playback to the pairing of a playback device and removable memory storage device

Methods for session based watermarking of media content using encrypted content streams are provided. At least two content streams of the same media content are watermarked with different watermark information and encrypted using different encryption percentages. During a playback session, a unique sequence is generated and provided to a client device for use by the client device in selecting consecutive content segments from the different content streams to produce the original media content with a watermark that uniquely identifies a user of the client device. When selecting the different content segments, the client device compares the encryption percentage of certain selected content segments with the expected encryption percentage for those content segments to determine whether the content streams have been tampered with.

Session based watermarking of media content using encrypted content streams

A computer device selected as a media server is connected to a consumer electronic (CE) device over multiple media transfer channels. The multiple media transfer channels together with an improved media transfer protocol allow for efficient, real-time transfer of different types of digital media, in various combinations, for playing on the CE device. Each type of media is transferred over its own dedicated channel according to its individual data rate. The improved media transfer protocol allows the data to be transmitted in either an asynchronous mode or a synchronous stream or timestamp mode depending on whether synchronization is desired. A dedicated control channel allows for the transfer of control information from the CE device to the media server as well as for resynchronizing media position of the server upon a change in play mode of the corresponding media.

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San Diego, CA, United States of America

Mayur Srinivasan