Abstract: Techniques are described for split processing of streaming segments in which processing operations are split between a source component and a decoder component. For example, the source component can perform operations for receiving a streaming segment, demultiplexing the streaming segment to separate a video content bit stream, scanning the video content bit stream to find a location at which decoding can begin (e.g., scanning up to a first decodable I-picture, for which header parameter sets are available for decoding), and send the video content bit stream to the decoder component beginning at the location (e.g., the first decodable I-picture). The decoder component can begin decoding at the identified location (e.g., the first decodable I-picture). The decoder component can also discard subsequent pictures that reference a reference picture not present in the video content bit stream (e.g., when decoding starts with a new streaming segment).

Abstract: Techniques are described for remuxing multimedia content received in a digital video broadcasting format without performing transcoding of the video and/or audio content. For example, a computing device with a digital television tuner can receive multimedia content in a digital video broadcast format. The computing device can remux the received multimedia content from the digital video broadcasting format in which the multimedia content is received into a target streaming protocol for streaming to other devices. Remuxing operations can comprise demultiplexing the received multimedia content to separate the audio and video content, performing meta-data reconstruction, and multiplexing the audio and video content into a target stream using a target streaming protocol format.

Abstract: A facility for completing a set of operations is described. Under the control of an application, the facility registers the background task to perform the set of operations. In response to the registration of the background task, the facility repeatedly invokes the background task to perform the set of operations.

Abstract: In one embodiment, a video processing system 300 may filter a video data set to correct skew and wobble using a central processing unit 220 and a graphical processing unit 230. The video processing system 300 may apply a rolling shutter effect correction filter to an initial version of a video data set. The video processing system 300 may simultaneously apply a video stabilization filter to the initial version to produce a final version video data set.

Abstract: Techniques and tools for interpolation of image/video content are described. For example, a tool such as a display processing module in a computing device receives pixel values of a low-resolution picture and determines an interpolated pixel value between a set of the pixel values from the low-resolution picture. The tool uses auto-regressive edge-directed interpolation that incorporates a backward projection constraint (AR-EDIBC). As part of the AR-EDIBC, the tool can compute auto-regressive (AR) coefficients then apply the AR coefficients to the set of pixel values to determine the interpolated pixel value. For the backward projection constraint, the tool accounts for effects of projecting interpolated pixel values back to the pixel values of the low-resolution picture. The tool stores the interpolated pixel values and pixel values from the low-resolution picture as part of a high-resolution picture. The tool can adaptively use AR-EDIBC depending on content and other factors.

Abstract: Disclosed herein are innovations in decoding compressed video media data. The disclosed innovations facilitate decoding operations with improved computational efficiency, faster speeds, reduced power, reduced memory usage, and/or reduced latency. In one embodiment, for example, an encoded bitstream of video media data is input from an external video content provider, the encoded bitstream being encoded according to a video codec standard. A decoder is then configured to decode the encoded bitstream based at least in part on supplemental information that identifies a property of the encoded bitstream but that is supplemental to the encoded bitstream (e.g., supplemental information that is not part of the encoded bitstream or its associated media container and that is specific (or related) to the application for which the bitstream is used and/or the standard by which the bitstream is encoded and/or encrypted).

Abstract: Technologies are described herein for providing enhanced packaging, coding, decoding and unpackaging of geometric data. In some configurations, geometric data is obtained by a device. The geometric data is partitioned into data partitions representing reconstruction information for video frames. The data partitions representing frames are then converted and integrated into a network abstraction layer of a bit stream. Geometric data may be obtained from the bit stream by accessing the data partitions from the network abstraction layer. The data partitions can be then processed into geometric data for further processing, such as the reconstruction, generation, display or processing of a three dimensional (3D) object modeled by the geometric data.

Abstract: Disclosed herein are innovations in decoding compressed video media data. The disclosed innovations facilitate decoding operations with improved computational efficiency, faster speeds, reduced power, reduced memory usage, and/or reduced latency. In one embodiment, for example, an encoded bitstream of video media data is input from an external video content provider, the encoded bitstream being encoded according to a video codec standard. A decoder is then configured to decode the encoded bitstream based at least in part on supplemental information that identifies a property of the encoded bitstream but that is supplemental to the encoded bitstream (e.g., supplemental information that is not part of the encoded bitstream or its associated media container and that is specific (or related) to the application for which the bitstream is used and/or the standard by which the bitstream is encoded and/or encrypted).

Abstract: Innovations in the area of hardware-protected digital rights management (“DRM”) systems are presented. For example, a hardware-protected DRM system includes a trusted layer and untrusted layer. In the untrusted layer, a control module receives source media data that includes encrypted media data. The control module processes metadata about the media data. The metadata, possibly exposed by a module in the trusted layer, is not opaque within the untrusted layer. In the trusted layer, using key data, a module decrypts encrypted media data, which can be the encrypted media data from the source media data or a transcripted version thereof. A module in the trusted layer decodes the decrypted media data. A host decoder in the untrusted layer uses the metadata to manage at least some aspects of the decoding, rendering and display in the trusted layer, without exposure of decrypted media data or key data within the untrusted layer.

Abstract: A video decoder is disclosed that uses metadata in order to make optimization decisions. In one embodiment, metadata is used to choose which of multiple available decoder engines should receive a video sequence. In another embodiment, the optimization decisions can be based on length and location metadata information associated with a video sequence. Using such metadata information, a decoder engine can skip start-code scanning to make the decoding process more efficient. Also based on the choice of decoder engine, it can decide whether emulation prevention byte removal shall happen together with start code scanning or not.

Abstract: Innovations in encoding and decoding of video pictures in a high-resolution chroma sampling format (such as YUV 4:4:4) using a video encoder and decoder operating on coded pictures in a low-resolution chroma sampling format (such as YUV 4:2:0) are presented. For example, high chroma resolution details are selectively encoded on a region-by-region basis. Or, as another example, coded pictures that contain sample values for low chroma resolution versions of input pictures and coded pictures that contain sample values for high chroma resolution details of the input pictures are encoded as separate sub-sequences of a single sequence of coded pictures, which can facilitate effective motion compensation. In this way, available encoders and decoders operating on coded pictures in the low-resolution chroma sampling format can be effectively used to provide high chroma resolution details.

Abstract: One or more techniques and/or systems are provided for video stabilization and/or for image frame generation. For example, a user may instruct a video application hosted on a smart phone to capture a video at a target resolution of 1080 pixels. A padded input having a padded resolution that is larger than the target resolution may be obtained from a capture device, such as a camera of the smart phone. The padded input may be provided to a video stabilization component to obtain a target image frame having the target resolution. In this way, the video stabilization component may perform cropping using padded margin pixels (e.g., additional pixels of the padded input beyond the 1080 pixels of the target resolution) so that image upscaling after cropping (e.g., to account for global warping, etc.) may be mitigated to reduce blur that may otherwise result from image upscaling.

Abstract: A video decoding method is implemented by a computer having multiple parallel processing units. A stream of data elements is received, some of which encode video content. The stream comprises marker sequences, each marker sequence comprising a marker which does not encode video content. A known pattern of data elements occurs in each marker sequence. A respective part of the stream is supplied to each parallel processing unit. Each parallel processing unit processes the respective part of the stream, whereby multiple parts of the stream are processed in parallel, to detect whether any of the multiple parts matches the known pattern of data elements, thereby identifying the markers. The encoded video content is separated from the identified markers. The separated video content is decoded, and the decoded video content outputted on a display.

Abstract: Video content is protected using a digital rights management (DRM) mechanism, the video content having been previously encrypted and compressed for distribution, and also including metadata such as closed captioning data, which might be encrypted or clear. The video content is obtained by a system of a computing device, the metadata is extracted from the video content and provided to a video decoder, and the video content is provided to a secure DRM component. The secure DRM component decrypts the video content and provides the decrypted video content to a secure decoder component of a video decoder. As part of the decryption, the secure DRM component drops the metadata that was included in the obtained video content. However, the video decoder receives the extracted metadata in a non-protected environment, and thus is able to provide the extracted metadata and the decoded video content to a content playback application.

Abstract: Technologies for a single-pass/single copy network abstraction layer unit (“NALU”) parser. Such a NALU parser typically reuses source and/or destination buffers, optionally changes endianess of NALU data, optionally processes emulation prevention codes, and optionally processes parameters in slice NALUs, all as part of a single pass/single copy process. The disclosed NALU parser technologies are further suitable for hardware implementation, software implementation, or any combination of the two.

Abstract: In one example, a quality management controller of a video processing system may optimize a video recovery action through the selective dropping of video frames. The video processing system may store a compressed video data set in memory. The video processing system may receive a recovery quality indication describing a recovery priority of a user. The video processing system may apply a quality management controller in a video pipeline to execute a video recovery action to retrieve an output data set from the compressed video data set using a video decoder. The quality management controller may select a recovery initiation frame from the compressed video data set to be an initial frame to decompress based upon the recovery quality indication.

Abstract: One or more techniques and/or systems are provided for video stabilization and/or for image frame generation. For example, a user may instruct a video application hosted on a smart phone to capture a video at a target resolution of 1080 pixels. A padded input having a padded resolution that is larger than the target resolution may be obtained from a capture device, such as a camera of the smart phone. The padded input may be provided to a video stabilization component to obtain a target image frame having the target resolution. In this way, the video stabilization component may perform cropping using padded margin pixels (e.g., additional pixels of the padded input beyond the 1080 pixels of the target resolution) so that image upscaling after cropping (e.g., to account for global warping, etc.) may be mitigated to reduce blur that may otherwise result from image upscaling.

Abstract: Video parameter storage and processing techniques with MPEG-4 file format are described. In one or more implementations, techniques are described in which sequence and parameter sets are specified in-band with collections of pictures of video as the default option. Techniques are also described in which different parameter set identifiers (IDs) are specified for the collections within the video. Techniques are also described in which maximum clip parameters are specified in a sample description box. Further, techniques are described in which parameter sets are inserted at a beginning of sample data when an access unit delimiter (AUD) network access layer (NAL) unit is not present or are inserted after the AUD NAL unit in the video when present.

Abstract: Buffer optimization techniques are described herein in which a graphics processing system is configured to implement and select between a plurality of buffer schemes for processing of an encoded data stream in dependence upon formats used for decoding and rendering (e.g., video format, bit depth, resolution, content type, etc.) and device capabilities such as available memory and/or processing power. Processing of an encoded data stream for display and rendering via the graphics processing system then occurs using a selected one of the buffer schemes to define buffers employed for the decoding and rendering, including at least configuring the sizes of buffers. The plurality of schemes may include at least one buffer scheme for processing the encoded content when the input format and the output format are the same, and a different buffer scheme for processing the encoded content when the input format and the output format are different.

Abstract: Syntax structures that indicate the completion of coded regions of pictures are described. For example, a syntax structure in an elementary bitstream indicates the completion of a coded region of a picture. The syntax structure can be a type of network abstraction layer unit, a type of supplemental enhancement information message or another syntax structure. For example, a media processing tool such as an encoder can detect completion of a coded region of a picture, then output, in a predefined order in an elementary bitstream, syntax structure(s) that contain the coded region as well as a different syntax structure that indicates the completion of the coded region. Another media processing tool such as a decoder can receive, in a predefined order in an elementary bitstream, syntax structure(s) that contain a coded region of a picture as well as a different syntax structure that indicates the completion of the coded region.