Adobe, Inc.

Oracle America, Inc.

Other

Kelly Kishore

Viswanathan Swaminathan

Srinivas R Manapragada

Gerard M Fernando

Michael A DeMoney

Gerard M X Fernando

Gerard Marius Xavier Fernando

Pragyan Debadarshini

A key delivery mechanism that delivers keys to an OS platform (e.g., iOS platform) devices for decrypting encrypted HTTP live streaming data. An HTTPS URL for a stateless HTTPS service is included in the manifest for an encrypted HTTP live stream obtained by an application (e.g., a browser) on an OS platform device. The URL includes an encrypted key, for example as a query parameter value. The application passes the manifest to the OS. The OS contacts the HTTPS service to obtain the key using the URL indicated in the manifest. Since the encrypted key is a parameter of the URL, the encrypted key is provided to the HTTPS service along with information identifying the content. The HTTPS service decrypts the encrypted key and returns the decrypted key to the OS over HTTPS, thus eliminating the need for a database lookup at the HTTPS service.

Methods and apparatus for key delivery in HTTP live streaming

Video data compression performance is improved through the use of multiple processors operating in parallel. The parallel processors perform motion or spatial estimation, where portions of a video frame are found to be similar to portions in reference frames. Because this estimation operation can be very time consuming, the use of multiple processors can reduce the overall time required, or they can enable higher-performing algorithms that might otherwise require a prohibitively long processing time. The motion or spatial estimation results are applied to reconstructed versions of the video frame data to enable high levels of video data compression.

Method and system for parallelizing video compression

Methods and apparatus for integrating digital rights management (DRM) systems with native HTTP live streaming. Several methods for integrating a DRM system with HTTP live streaming on an operating system (OS) platform are described. In each of these methods, a manifest is delivered to an application on a device; the application then accesses a remote DRM server to obtain a license and one or more keys for the content. The DRM server enforces the rights of the client in regard to the indicated content. The application may modify the manifest to indicate a method for obtaining the key. The application delivers the manifest to the OS, which uses the indicated method (e.g., a URL) to obtain the key. While similar, the methods primarily differ in the manner in which the OS is directed to obtain the key.

Methods and apparatus for integrating digital rights management (DRM) systems with native HTTP live streaming

A method for encoding a video frame. The method including obtaining a current frame from a video stream, where the video stream includes a number of frames, determining a first base QP value for the current frame, and sending the first base QP value for the current frame to a decoder. The method also includes obtaining a first macroblock from the current frame, where the first macroblock includes a first image on the current frame, determining a first actual quantization parameter (QP) value for the first macroblock, and determining a first reference block for the first macroblock. The method also includes determining a first predicted QP value for the first macroblock using the first reference block, calculating a first &#x394;QP value for the first macroblock, and sending the first &#x394;QP value, a first prediction mode, and a first reference vector to the decoder.

Quantization parameter prediction

A method for delivering a data stream to a plurality of clients in a network. The method involves receiving the data stream from a media server, where the data stream includes a plurality of data packets and a data stream identifier associated with at least one of the plurality of data packets, securing the data stream received from the media server by applying a filter to the data stream to obtain a filtered data packet from the plurality of data packets based on the data stream identifier, encrypting the filtered data packet using an encryption scheme to obtain a encrypted media content, and distributing the encrypted media content to at least one of the plurality of clients in the network.

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San Jose, CA, United States of America

Kelly Kishore