Abstract: Syntax changes for SHVC/MV-HEVC coding apparatus and methods are described which improve efficiency. In a first portion, syntax of header signaling position under P or B-slice conditions are described, and a new condition to signal inter-layer prediction layer. A second portion describes use of an inter-layer reference picture set as an alternative to the first portion, and provides an arranged syntax to more efficiently signal inter-layer reference information. In a third portion, an inter-layer sample only prediction and TMVP interaction is described which reduces signaling needs for collocated references syntax.

Abstract: An extension to the motion-constrained tile sets SEI message provides functionality to signal all tiles are independently decodable and to signal the ROIs that may have more than one tile per ROI. With this extension, the functionality to redefine any independently decodable region-of-interest in a CVS at a coding tree unit level based on user interactivity is enabled. The extension supports the interactivity utilized in various applications such as interactive Ultra High Definition Television (UHDTV), dynamic high-quality zoom-in application, interactive on-demand, e-learning, smart surveillance and many other applications. Additionally, the temporal MCTS SEI message is able to be used by an encoder for tiled streaming to signal explicitly to the decoder that the decoder need only to display the ROI.

Abstract: Coefficient coding for transform units (TUs) during high efficiency video coding (HEVC), and similar standards, toward simplifying design while enhancing efficiency. Elements of the invention include coefficient coding for TUs with up-right diagonal scans being modified, and selectively applying multi-level significance map coding.

Abstract: The VPS and vps_extension( ) syntax structures are updated with some cleanups for the HEVC Extensions in scalable video coding, multi-view coding and 3D video coding areas. In addition, four options of adding syntaxes to support mixed video sequences in various layers for the VPS extension are described.

Abstract: A method and apparatus of using logical mode numbers during both prediction and coding in the bit stream, such as for high efficiency video coders (HEVC). These logical intra mode numbers are sorted based on angle which as a result leads to improved coding designs with fewer and smaller look-up tables, and a small gain in coding efficiency. Furthermore, by using this type of naming, the number of most probable modes (MPMs) can be readily extended since no additional tables are required. The use of three MPMs achieves a larger gain of 0.25% and 0.31% for the AI_HE and AI_LC cases, respectively.

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: The invention relates to encoding and decoding descriptions of multimedia content in two formats using access units. The invention further relates to dynamically updating multimedia description using access units and to supporting the delivery of distributed multimedia descriptions.

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: 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: 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: Graphs representing multimedia content are validated and modified through graph matching and graph rewriting techniques using pre-defined model graphs. In one aspect, an input graph is validated against a model template graph. In another aspect, suggestions for modifying an input graph are provided based on model alphabet, rule and morphism graphs. The resulting graphs may represent queries against existing description schemes or new description schemes.

Abstract: The invention relates to a key frame such as a KeyFrameDS. A list of key, length, and value (KLV) attribute groups are used in the KeyFrameDS. The KeyFrameDS may be modified by changing, for example, an attribute group. This may be accomplished, for example, by changing one of its attributes, such as the value attribute.

Abstract: A multimedia presentation is transformed for playback on multiple heterogeneous target devices. A transformation operation is selected based on capabilities of the target device and used to create an adapted version of the multimedia presentation from a source version of the multimedia presentation. The adapted version contains adapted media data corresponding to a source version of media data for the multimedia presentation. In one aspect, the adapted version of the multimedia presentation also includes adapted composition data corresponding to a source version of composition data for the multimedia presentation. In another aspect, the adapted media data is created from a source version of description data for the multimedia presentation.

Abstract: Graphs representing multimedia content are validated and modified through graph matching and graph rewriting techniques using pre-defined model graphs. In one aspect, an input graph is validated against a model template graph. In another aspect, suggestions for modifying an input graph are provided based on model alphabet, rule and morphism graphs. The resulting graphs may represent queries against existing description schemes or new description schemes.

Abstract: The invention relates to encoding and decoding descriptions of multimedia content in two formats using access units. The invention further relates to dynamically updating multimedia description using access units and to supporting the delivery of distributed multimedia descriptions.

Abstract: Multimedia content descriptions are encoded for a specific application domain using an instance document that encodes the descriptions in a general application domain. The instance document is transformed from the general application domain to the specific application domain by mapping from a general application namespace to a specific application namespace, and a binary version is created from the transformed instance document. A frequency table derived from the specific application namespace may be used to create a more optimized binary version.