Abstract: One embodiment of the present invention sets forth a technique for detecting a shot change in a video. The technique includes calculating a first plurality of difference values for pixel blocks included in a first video frame and a second video frame and calculating a first cumulative distribution function (CDF) based on the first plurality of difference values. The technique further includes calculating a second plurality of difference values for pixel blocks included in a first plurality of video frames that is contiguous with the first video frame and calculating a second CDF based on the second plurality of difference values. The technique further includes comparing the first CDF to the second CDF to detect a shot change.

Abstract: Systems, methods and computer-readable storage devices each provide, for a given flow entry in a flow table associated with a packet flow, a first atomic counter associated with a first color and a second atomic counter associated with a second color. The system, for a first coloring interval, marks traffic in the packet flow from a tenant to a fabric as the first color and increments the first atomic counter. At a conclusion of the first coloring interval and for a second coloring interval, the system marks the traffic in the packet flow from the tenant to the fabric as the second color and increments the second atomic counter. The system compares first packet counts associated with the first color at an ingress point with second packet counts associated with the first color at an egress point to the fabric.

Abstract: One embodiment of the present invention sets forth a technique for mitigating drift in audiovisual assets. The technique includes determining that an edit associated with a presentation timeline is within boundaries of a video frame. The technique further includes calculating a temporal drift associated with the edit, where the temporal drift comprises a duration of time between the edit and a boundary of the video frame. The technique further includes determining whether to include the video frame in the presentation timeline based on the temporal drift and an accumulated temporal drift associated with the presentation timeline.

Abstract: In one embodiment, a method includes receiving at a multimedia transformation unit, media streams from a plurality of endpoints, transmitting audio components of the media streams to a multipoint conferencing unit, receiving an identifier from the multipoint conferencing unit identifying one of the media streams as an active speaker stream, processing at the multimedia transformation unit, a video component of the active speaker stream, and transmitting the active speaker stream to one or more of the endpoints without transmitting the video component to the multipoint conferencing unit. An apparatus is also disclosed herein.

Abstract: In one embodiment, a method includes receiving at a multimedia transformation unit, media streams from a plurality of endpoints, transmitting audio components of the media streams to a multipoint conferencing unit, receiving an identifier from the multipoint conferencing unit identifying one of the media streams as an active speaker stream, processing at the multimedia transformation unit, a video component of the active speaker stream, and transmitting the active speaker stream to one or more of the endpoints without transmitting the video component to the multipoint conferencing unit. An apparatus is also disclosed herein.

Abstract: In one embodiment, a method includes receiving at a multimedia transformation unit, media streams from a plurality of endpoints, transmitting audio components of the media streams to a multipoint conferencing unit, receiving an identifier from the multipoint conferencing unit identifying one of the media streams as an active speaker stream, processing at the multimedia transformation unit, a video component of the active speaker stream, and transmitting the active speaker stream to one or more of the endpoints without transmitting the video component to the multipoint conferencing unit. An apparatus is also disclosed.

Abstract: In one embodiment, a method includes identifying priority objects in a composite image created from one or more input video streams, processing the composite image, and generating a plurality of output video streams. The output video streams correspond to display screens available for viewing the output video streams and the number of output video streams is different than the number of input video streams. Processing the composite image includes positioning the priority objects to prevent placement of the priority objects at a location extending over two of the display screens. An apparatus is also disclosed.

Abstract: A network device may include a timing module and at least one interface. The timing module determines a local time of the network device indicating when the network device sends a synchronization start message. The at least one interface sends the synchronization start message to a time client device to set the current time of day on the time client device, receives a synchronization response message from the time client device indicating that the current time of day of the time client device was set, and sends a synchronization success message to the time client device indicating that the time client device has correctly set its current time of day.

Abstract: A framework for efficient sum of absolute difference (SAD) computations for variable block size, sub-pixel motion estimation is presented. Simultaneous, or parallelized, SAD computations can be performed by storing and re-using previous SAD computational information, which can speed up the performance of a motion estimation module by reducing the number of cycles necessary to perform a particular motion estimation algorithm.

Abstract: An example method may include receiving a media stream from a first endpoint, where the media stream is intended for a second endpoint; processing the media stream according to at least one processing option; compressing the media stream; and communicating the media stream to the second endpoint. In more specific instances, the processing may include converting a speech in the media stream to text in a first language; converting the text in the first language to text in a second language; rendering the text in the second language; and adding the rendered text in the media stream.

Abstract: A network device may receive first qualification indicators, for a first signal, from all line cards of the network device. The network device may, in response to the first qualification indicators, transmit instructions to all of the line cards to use the first signal. The network device may further receive second qualification indicators, for a second signal, from all of the line cards. In response to the second qualification indicators, the network device may store information for the second signal in order to use the second signal as a backup signal.

Abstract: In one embodiment, a method includes receiving data for compression at a first network device comprising an initial processing portion of a compression system, performing one or more processes to prepare the data for entropy encoding, compacting the data, and transmitting the compacted data to a second network device comprising an entropy encoding portion of the compression system. The first and second network devices include independent processors. An apparatus and system are also disclosed.

Abstract: An example method may include receiving a media stream from a first endpoint, where the media stream is intended for a second endpoint; processing the media stream according to at least one processing option; compressing the media stream; and communicating the media stream to the second endpoint. In more specific instances, the processing may include converting a speech in the media stream to text in a first language; converting the text in the first language to text in a second language; rendering the text in the second language; and adding the rendered text in the media stream.

Abstract: A method and apparatus for encoding video frames is described. In one embodiment, an encoding method includes jointly transforming a set of pixels into high-pass data using an orthonormal transform. The set of pixels includes at least one reference pixel and predicted pixels. The method further includes generating low-pass data using the reference pixel and the high-pass data.

Abstract: In one embodiment, a method includes identifying priority objects in a composite image created from one or more input video streams, processing the composite image, and generating a plurality of output video streams. The output video streams correspond to display screens available for viewing the output video streams and the number of output video streams is different than the number of input video streams. Processing the composite image includes positioning the priority objects to prevent placement of the priority objects at a location extending over two of the display screens. An apparatus is also disclosed.

Abstract: In one embodiment, a method includes receiving at a multimedia transformation unit, media streams from a plurality of endpoints, transmitting audio components of the media streams to a multipoint conferencing unit, receiving an identifier from the multipoint conferencing unit identifying one of the media streams as an active speaker stream, processing at the multimedia transformation unit, a video component of the active speaker stream, and transmitting the active speaker stream to one or more of the endpoints without transmitting the video component to the multipoint conferencing unit. An apparatus is also disclosed.

Abstract: A system for compressing digital data by representing a portion of it predictionally and transformationally as a block of transform coefficients, then quantizing that block selectively into a set of encoding symbols based on an indication whether the transform coefficients represent the portion as having a particular characteristic, and then by encoding the set of encoding symbols into a data bit stream. In particular, frequency may be used as the characteristic of the digital data in many applications.

Abstract: A motion estimation method and apparatus for video coding of a multi-view sequence is described. In one embodiment, a motion estimation method includes identifying one or more pixels in a first frame of a multi-view video sequence, and constraining a search range associated with a second frame of the multi-view video sequence based on an indication of a desired correlation between efficient coding and semantic accuracy. The semantic accuracy relies on use of geometric configurations of cameras capturing the multi-view video sequence. The method further includes searching the second frame within the constrained search range for a match of the pixels identified in the first frame.

Abstract: Systems and methods for optimizing system performance in variable length decoding systems are described. Embodiments are described in which decode tables are analyzed and elements of the tables sorted by probability of occurrence. Storage of elements can be determined by probability of occurrence and embodiments of the present invention can optimize system efficiency by storing most likely entries into fast-memory and least likely entries in slowest memory. In certain embodiments, a single large table is provided that cannot fit into decoder fast-memory. In some embodiments, individual elements can be optimized for storage in fast-memory by selecting more frequently occurring entries or groups of entries into decoder memory.

Abstract: A method and apparatus for encoding video frames is described. In one embodiment, an encoding method includes jointly transforming a set of pixels into high-pass data using an orthonormal transform. The set of pixels includes at least one reference pixel and predicted pixels. The method further includes generating low-pass data using the reference pixel and the high-pass data.