Vudu, Inc.

Harmonic, Inc.

Edin Hodzic

Andrew Martin Goodman

Prasanna Ganesan

Sumankar Shankar

In accordance with an embodiment of the present invention, a client device is protected against the execution of unauthorized software. The client includes a code authentication process that verifies the integrity of executable code, by generating and comparing a first hash value of the executable code with a known hash value of the original code. Furthermore, during boot-up, the client initializes a CPU exception vector table with one or more vector table entries. One or more, or all, of the vector table entries direct the CPU to execute the code authentication process prior to executing an event handler when an exception event occurs. Consequently, the code authentication process is virtually guaranteed to execute, thereby protecting against the execution of unauthorized code.

Method and system for protecting against the execution of unauthorized software

Approaches for recovering one or more media datagrams. A plurality of media datagrams, a plurality of row forward error correction (FEC) datagrams, and a plurality of column FEC datagrams are received. The plurality of media datagrams is logically arranged in rows and columns of media datagrams. Each row FEC datagram corresponds to one of the rows of the media datagrams and each column FEC datagram corresponds to one of the columns of media datagrams. Each received datagram is stored in a buffer. Upon determining that a particular media datagram is missing, it is determined whether a particular row FEC datagram or a particular column FEC datagram covering the particular media datagram has been received and is missing only a single media datagram for which it covers. If so, then, the particular media datagram is recovered using the particular row FEC datagram or the particular column FEC datagram.

High bit rate media FEC recovery

A system and method for providing multiple audio streams for a video over a network such as the Internet. The system comprises a server that includes an encryption unit and a slicing unit, a plurality of boxes, and an ordering box. The server encodes multiple audio streams and a single video to be sliced into segments. The sliced segments of multiple audio streams and the single video are seeded to a number of the plurality of boxes. This may be repeated for other videos with multiple streams. When the ordering box makes a request for a single video with a single audio, then the number of boxes with segments of the requested video and multiple audio streams, filters and sends the requested video and requested single audio stream to the ordering box. Similarly, multiple closed caption streams can be handled and provided like the audio streams.

Multiple audio streams

A system for providing trickplay functionality&#x2014;such as pause, instant replay, rewind, fast forward, etc&#x2014;for very highly compressed video/audio data stream. Depending on the trickplay functionality, the system configures the duration of playback before a jump, the decoding speed required, the number of pictures to display per second, and the distance between jumps. The system may comprise a decoder, a picture rate controller and a display.

System and method for trick play of highly compressed video data

In accordance with an embodiment of the present invention, a trusted client includes a non-volatile memory programmed with an encrypted disk key. The encrypted disk key in the non-volatile memory is encrypted with a master key of a security processor. Accordingly, encrypted data received by the central processor from a disk's security logic is forwarded to a security processor along with the encrypted disk key. The security processor decrypts the encrypted disk key and then decrypts the encrypted data, utilizing the disk key. The disk key is never available to the central processing unit in the clear.

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Pleasanton, CA, United States of America

Edin Hodzic