Ariadne's Thread (usa), Inc.

Sony Corporation

Divx, LLC

Advanced Micro Devices Corporation

Sonic Ip, Inc.

Ariadne's Thread (usa), Inc. (dba Immerex)

Divxnetworks, Inc.

Adam H Li

Djung N Nguyen

Eric William Grab

Aixin Liu

Jason A Braness

Brian T Fudge

Michael John Floyd

Damien Chavarria

Jerald Donaldson

Heather Hitchcock

Jerome Rota

Charles Gregory Passmore

Megan Farrell

Libiao Jiang

Nathaniel David Naegle

Christopher Durham

Timothy Sayre

Benjamin Cote

Darrius Nguyen Thompson

Alastair Mayo

Frederick J Zustak

Bruce Montag

Daryl G Sartain

Abou Ul Aala Ahsan

Ahsan Butt

Eugene Kuznetsov

Girish P Subramaniam

Jihyuk Choi

David Lawson

Sander Van Zoest

Heather Hitchcook

Techniques are provided herein for processing video data. The techniques include identifying one or more input factors including one or more of signal quality factors, video content complexity factors, and hardware buffering factors for one or more of a video encoding system and a video playback system; evaluating the one or more input factors to determine adjustments to apply to one or both of the video encoding system and the video playback system; and applying the determine adjustments to the one or both of the video encoding system and the video playback system.

Combined codec buffer management

A multimedia file and methods of generating, distributing and using the multimedia file are described. Multimedia files in accordance with embodiments of the present invention can contain multiple video tracks, multiple audio tracks, multiple subtitle tracks, data that can be used to generate a menu interface to access the contents of the file and 'meta data' concerning the contents of the file. Multimedia files in accordance with several embodiments of the present invention also include references to video tracks, audio tracks, subtitle tracks and 'meta data' external to the file. One embodiment of a multimedia file in accordance with the present invention includes a series of encoded video frames and encoded menu information.

Multimedia distribution system for multimedia files with packed frames

Systems, apparatuses, and methods for performing efficient video transmission are disclosed. In a video processing system, a transmitter identifies multiple planes in a scene. The transmitter renders and compresses each of the multiple planes with a combination of a corresponding compression level and a resolution, which is different from a combination of compression level and resolution of any other plane. For each plane, the transmitter inserts, in multi-plane information, data such as identification of the plane, a location in the video frame for the plane, and one or more of a resolution and compression level for the plane. The transmitter conveys the rendered and compressed planes along with the multi-plane information to a receiver. The receiver decodes each of the planes and insets each of the planes on any lower resolution planes of the multiple planes.

Multi-plane transmission

Disclosed herein are techniques for obtaining location data for a sensor fusion device. The techniques include transmitting or receiving a signal from or to the sensor fusion device. The techniques also include obtaining angle-based location data, based on the signal and on an angle-based location finding technique. The techniques also include determining location data for the sensor fusion device or an auxiliary device associated with the sensor fusion device, based on the angle-based location data.

Multi-sensor location data tracking

Systems, apparatuses, and methods for performing efficient video compression are disclosed. A video processing system includes a transmitter sending a video stream over a wireless link to a receiver. The transmitter includes a processor and an encoder. The processor generates rendered blocks of pixels of a video frame, and when the processor predicts a compression level for a given region of the video frame is different from a compression level for immediately neighboring blocks, the processor generates side information. The side information identifies a location of the given region in the video frame and a type of content that causes the compression level differences. The processor sends the rendered video information and the side information as accompanying metadata to the encoder. The encoder updates encoding parameters based on the received side information, and compresses the rendered given region based on the updated encoding parameters.

Side information for video data transmission

Multimedia distribution system for multimedia files with interleaved media chunks of varying types

Systems, apparatuses, and methods for performing efficient bitrate control of video compression are disclosed. Logic in a bitrate controller of a video encoder receives a target block bitstream length for a block of pixels of a video frame. When the logic determines a count of previously compressed blocks does not exceed a count threshold, the logic selects a quantization parameter from a full range of available quantization parameters. After encoding the block, the logic determines a parameter based on a first ratio of the achieved block bitstream length to an exponential value of an actual quantization parameter used to generate the achieved block bitstream length. For another block, when the count exceeds the count threshold, the logic generates a quantization parameter based on a ratio of the target block bitstream length to an average of parameters of previously encoded blocks.

Block level rate control

A virtual reality display system that generates display images in two phases: the first phase renders images based on a predicted pose at the time the display will be updated; the second phase re-predicts the pose using recent sensor data, and corrects the images based on changes since the initial prediction. The second phase may be delayed so that it occurs just in time for a display update cycle, to ensure that sensor data is as accurate as possible for the revised pose prediction. Pose prediction may extrapolate sensor data by integrating differential equations of motion. It may incorporate biomechanical models of the user, which may be learned by prompting the user to perform specific movements. Pose prediction may take into account a user's tendency to look towards regions of interest. Multiple parallel pose predictions may be made to reflect uncertainty in the user's movement.

Predictive virtual reality display system with post rendering correction

A virtual reality display system that renders images at different resolutions in different parts of a display. Reduces rendering latency by rendering at a lower resolution in selected regions, for example on the sides of a display where human vision has lower resolution than in the center. Pixels in low resolution regions are combined into grid elements, and rendering may generate grid element values rather than individual pixel values. Rendering may use ray casting, rasterization, or both. Variable resolution rendering may be combined with variable level of detail geometry models to further reduce rendering time. Selected objects may be designed as high resolution objects that are rendered at a high resolution even in low resolution display regions.

Variable resolution virtual reality display system

A system that efficiently estimates an object's orientation using magnetic, angular rate, and gravity sensors. The object may be for example a virtual reality headset or a user in a virtual reality environment. Magnetic and gravity data are used to correct errors that accumulate from integrating angular velocity. Unlike systems that use Kalman filter approaches, embodiments of the system apply a simple, highly efficient technique to generate magnetic and gravity error vectors; these error vectors are added directly to the angular velocity prior to integration. Error calculations are performed in the sensor reference frame rather than in the Earth reference frame. Magnetic error correction uses only the horizontal component of the magnetic field, which is efficiently calculated by subtracting off the projection of the magnetic field onto the measured gravity vector. Sensors and processors for calculating orientation may be integrated into a low-latency virtual reality display system.

Efficient orientation estimation system using magnetic, angular rate, and gravity sensors

A modular virtual reality headset that may be operated in multiple modes. Embodiments enable a mount with modular receivers having electronic and mechanical interfaces that accept swappable modules. Swappable modules may include swappable display modules, swappable audio modules, and swappable sensor modules. Embodiments enable multiple modes of operation, including for example a virtual mode to display virtual reality environments, a real mode to display images of the real environment surrounding the user, and an augmented reality mode that overlays real scenes with other information. Embodiments may also provide multiple modes of operation for audio.

Modular multi-mode virtual reality headset

Growing community of inventors

Solana Beach, CA, United States of America

Adam H Li