Cisco Technology, Inc.

Synamedia Limited

Triton US Vp Acquisition Co.

Triton US Vp Acquision Co.

Nds Corporation

Keith Millar

Robert Edward May

Michal Irit Devir

Harel Cain

Carol Etta Iturralde

Eric Colin Friedrich

Gareth John Bowen

Avraham A Poupko

Thomas Levy

David Wachtfogel

Matthew Francis Caulfield

Dan Ariel Elbert

Len Sundy

Martin Gold

Kevin Scott Kirkup

Gilad Taub

Doron Tzur

Avraham Poupko

Colin Harvey

Max Berman

Brett Walzer

Tal Pasternak

Matthew F Caufield

Kevin S Kirkup

In one embodiment, a method includes identifying a plurality of segments of media content, each of the plurality of segments including a plurality of media frames, generating segment metadata for each of the plurality of segments, the segment metadata including a segment identifier, transmitting a broadcast stream including the plurality of segments and the segment metadata for each of the plurality of segments, and making the plurality of segments available for retrieval via a unicast stream using the segment identifiers.

Transitioning between broadcast and unicast streams

Server-side trick mode restrictions in a stream may be provided. The stream may comprise, for example, a Video on Demand (VOD) Adaptive Bitrate (ABR) stream. First, a playlist request corresponding to a stream may be received from a user device. Next, a current stream position in the stream may be determined. In response to receiving the playlist request and when the current stream position corresponds to a non-skip segment, a playlist may be created having a last chunk comprising a next chunk of the stream from the current stream position. The playlist may then be provided to the user device.

Real-time interstitial content resolution and trick mode restrictions

In one implementation, a method performed by a content server with one or more processors and non-transitory memory includes: receiving a first view request from a first client device; determining a first view group associated with the first client device in response to receiving the first view request; identifying a first view hierarchy based on the first view group, where the first view hierarchy includes a first plurality of pointers to a first plurality of content sub-tree hierarchies associated with content items and the first view hierarchy also includes a first order schema; obtaining the first plurality of content sub-tree hierarchies based on the first plurality of pointers; and transmitting display data associated with a first user interface to the first client device based on the first order schema and the first plurality of content sub-tree hierarchies.

Method and device for field testing user interfaces based on a flexible hierarchy structure

A system can include a reconciliation engine configured to evaluate metadata in a given manifest file of a plurality of manifest files generated for redundant copies of a given media asset. The metadata describes a condition of a given chunk of media content in one of the redundant copies of the given media asset. The system can also include a manifest modification function configured to modify the given manifest file for the given chunk of media content in response to the reconciliation engine detecting that the given chunk of media content is damaged based on the evaluation of the metadata associated with the given chunk of media content in the given manifest file.

Reconciling redundant copies of media content

A method of decrypting a scrambled digital data item at a client is disclosed, the method including: receiving actual control messages at the client, wherein each actual control message includes control word generating information for generating a control word associated with the actual control message; storing the actual control messages at the client; receiving the scrambled digital data item at the client independently of the actual control messages, wherein the scrambled digital data item includes a plurality of segments of scrambled digital data, each segment of scrambled digital data being associated with one of the actual control messages and being scrambled with the control word associated with the one of the actual control messages, and wherein the scrambled digital data item further includes a plurality of reference control messages, each segment of scrambled digital data comprising one of the reference control messages, each of the reference control messages including a control message reference value identifying the actual control message associated with the segment of scrambled digital data; and decrypting the scrambled digital data item using the plurality of actual control messages.

Scrambled digital data item

A Headend system including a encoder to encode input data yielding a plurality of data packets, each of the packets having a header and a payload, a post encoding processor to identify ones of the data packets having a payload with a suspected known plaintext, and modify at least some of the identified packets, and an encryption processor to encrypt at least some of the data packets yielding encrypted data packets. Related apparatus and methods are also described.

Known plaintext attack protection

A method of content sub-item substitution is described. The method includes: receiving from a headend a description of a plurality of virtual channels, the description defining each virtual channel on the basis of one or more metadata attributes associated with that virtual channel; receiving one or more content sub-item substitution opportunities for each virtual channel, each content sub-item substitution opportunity specifying one or more content sub-items for use in the content sub-item substitution; and receiving and recording a content item, the content item including metadata associated with the content item and one or more substitutable content sub-items. The method further includes, upon playback () of a previously recorded content item: matching the metadata associated with the previously recorded content item with the one or more metadata attributes, thereby determining a virtual channel () valid for the previously recorded content item; selecting a content sub-item substitution opportunity () based on the determined virtual channel; and substituting the one or more substitutable content sub-items () with content sub-items specified in the selected content sub-item substitution opportunity. Related apparatus and methods are also disclosed.

Content sub-item substitution

A Headend system including a video codec to encode a video sequence yielding an encoded video sequence having video packets, a multiplexer, a signal generator to receive a notification of a splice point, analyze at least some of the encoded video packets based on the notification in order to find a random-access-point-packet, the random-access-point being a point from which to start decoding the encoded video sequence by the rendering device so that the video sequence may be rendered for output from the splice point, create a timing signal estimating a location of the random-access-point-packet in the encoded video sequence, and output the timing signal to the multiplexer or transmission equipment. Related apparatus and methods are also described.

Splicing of content

Growing community of inventors

Haywards Heath, United Kingdom

Keith Millar