Vixs Systems, Inc.

Xinghai Li

Xu Gang (Wilf) Zhao

Gang Qiu

Jie Feng

Xu Gang Zhao

Ying Liu

Bradley Arthur Wallace

Yinxia (Michael) Yang

Xiaowen Wu

Jason Wang

Jeffrey (Fu) Jin

Edward Hong

Xin Guo

Avinash Ramachandran

Zhong Yan (Jason) Wang

Ruijing (Ray) Dong

In various embodiments, a color gamut mapper includes a gamut map selection generator configured to analyze color space signals and generate a gamut map selection signal in response thereto. A color gamut transformer is configured to process the color space signals via a selected one of a plurality of gamut maps to generate gamut mapped color space signals, wherein the selected one of the plurality of gamut maps is selected in response to the gamut map selection signal. Other embodiments are disclosed.

Color gamut mapper for dynamic range conversion and methods for use therewith

An entropy coding module is provided for use in a video encoder that encodes a video input signal based on a plurality of macroblocks derived from the video input signal. The entropy coding module includes an entropy coder that generates entropy encoded data from discrete transformed coefficients for the plurality of macroblocks. A neighbor management module stores neighbor data for at least one macroblock of the plurality of macroblocks for retrieval by the entropy encoder, when operating on at least one neighboring macroblock of the plurality of macroblocks.

Neighbor management for use in entropy encoding and methods for use therewith

A system for processing a video signal includes a static region identification and separation module for generating static region image data corresponding to a static region of the video signal, for generating dynamic region video data corresponding to at least one dynamic region in the video signal and for generating dynamic region location data that indicates at least one location corresponding to the at least one dynamic region in the video signal. A static region encoding module image encodes the state region image data to produce encoded static region data. A video encoder section generates at least one encoded video signal by compressing the dynamic region video data.

Video processing with static and dynamic regions and method for use therewith

Reference pictures received via a video signal are downscaled to a specified resolution by a video encoder/decoder. For each current picture being processed by the video encoder/decoder, the current picture is maintained at its original received resolution, but is divided into blocks. Each block is further divided into sub-blocks, and each sub-block is compared, for a set of specified positions, to a corresponding block of the downscaled reference image to generate a set of candidate motion vectors. The candidate motion vectors are scored according to how closely their corresponding sub-block matches the corresponding block of the reference picture at the corresponding position, and a motion vector for each block of the current image is selected based on the scores. The selected motion vectors are used to process (e.g. encode) the video signal.

Motion search with scaled and unscaled pictures

In various embodiments, a filtering tone mapper includes a two-dimensional filter. A tone mapper configured to apply tone mapping to a video frame in accordance with a tone mapping function to generate a processed video frame, wherein the tone mapper operates in conjunction with the two-dimensional filter to apply the tone mapping to pixels of the video frame based on a plurality of adjacent pixels of the video frame. Other embodiments are disclosed.

Tone mapper with filtering for dynamic range conversion and methods for use therewith

In various embodiments, a dynamic range converter includes a plurality of circuits, including at least one configurable circuit that operates based on configuration data. The plurality of circuits include a first color space converter to convert a source color space of a source video having a source dynamic range to nonlinear color space signals. A linearizer configured converts the nonlinear color space signals to linearized color space signals having a mastering dynamic range via a piecewise linear interpolation of a transfer function. A color volume transformer applies dynamic color transform metadata associated with the source video to generate master adjusted color space signals from the linearized color space signals. A delinearizer converts the master adjusted color space signals to nonlinearized color space signals via a piecewise linear interpolation of an inverse transfer function in accordance with a display dynamic range. A second color space converter converts the nonlinearized color space signals to display domain signals. Other embodiments are disclosed.

Dynamic range converter with reconfigurable architecture and methods for use therewith

In various embodiments, a dynamic range converter includes a first color space converter to convert a source color space of a source video having a source dynamic range to nonlinear color space signals. A linearizer configured converts the nonlinear color space signals to linearized color space signals having a mastering dynamic range via a piecewise linear interpolation of a transfer function. A color volume transformer applies dynamic color transform metadata associated with the source video to generate master adjusted color space signals from the linearized color space signals. A delinearizer converts the master adjusted color space signals to nonlinearized color space signals via a piecewise linear interpolation of an inverse transfer function in accordance with a display dynamic range. A second color space converter converts the nonlinearized color space signals to display domain signals. Other embodiments are disclosed.

Dynamic range converter with generic architecture and methods for use therewith

A motion compensation module can be used in a video encoder for encoding a video input signal that includes a sequence of images that are segmented into a plurality of macroblocks. The motion compensation module includes a shared memory and a motion search module that generates a motion search motion vector for a plurality of subblocks for a plurality of partitionings of a macroblock of a plurality of macroblocks and generates a selected group of the plurality of partitionings and stores the selected group of partitionings and the corresponding motion search motion vectors in the shared memory. A motion refinement module retrieves the selected group of partitionings and the corresponding motion search motion vectors from the shared memory, that generates a refined motion vector for the plurality of subblocks for the selected group of the plurality of partitionings of the macroblock of the plurality of macroblocks, based on the motion search motion vector for each of the plurality of subblocks of the macroblock of the plurality of macroblocks.

Motion refinement engine with shared memory for use in video encoding and methods for use therewith

A motion compensation module can be used in a video encoder for encoding a video input signal. The motion compensation module includes a neighbor management module that generates and stores neighbor data for at least one macroblock of the plurality of macroblocks for retrieval for retrieval by at least one of a motion search module, a motion refinement module, a direct mode module, and an intra-prediction module, when operating on at least one neighboring macroblock of the plurality of macroblocks.

Neighbor management module for use in video encoding and methods for use therewith

A motion compensation module can be used in a video encoder that encodes, into a processed video signal, a video input signal including a sequence of pictures. The motion compensation module includes a motion flag generation module that generates a motion flag for at least one of the plurality of macroblocks of a first picture of the sequence of pictures based on a corresponding macroblock of a plurality of macroblocks of a second picture of the sequence of pictures. A direct mode motion vector module evaluates a direct mode motion vector for the corresponding macroblock of the second picture, based on the motion flag for the at least one of the plurality of macroblocks of the first picture.

Direct mode module with motion flag precoding and methods for use therewith

A video encoder includes a mode decision module that determines a final macroblock cost for each macroblock of the plurality of macroblocks based on costs associated with a plurality of motion vectors. An intra pulse code modulation (IPCM) module, when enabled, selects an IPCM mode when the final macroblock cost compares unfavorably to an IPCM threshold. A reconstruction module generates residual pixel values for each macroblock of the plurality of macroblocks and a transform and quantization module, transforms and quantizes the residual pixel values when the IPCM mode is not selected.

Motion compensation module with fast intra pulse code modulation mode decisions and methods for use therewith

A motion compensation module, that can be used in a video encoder for encoding a video input signal, includes a motion search module that generates a motion search motion vector for each macroblock of a plurality of macroblocks by contemporaneously evaluating a top frame macroblock and bottom frame macroblock from a frame of the video input signal and a top field macroblock and a bottom field macroblock from corresponding fields of the video input signal. A motion refinement module, when enabled, generates a refined motion vector for each macroblock of the plurality of macroblocks, based on the motion search motion vector.

Motion search module with field and frame processing and methods for use therewith

A motion compensation module, that can be used in a video encoder for encoding a video input signal, includes a motion search module that generates a motion search motion vector for each motion search macroblock of a plurality of motion search macroblocks in at least one of a horizontally compressed and vertically uncompressed field of the video input signal and a horizontally compressed and vertically uncompressed frame of the video input signal. A motion refinement module generates a refined motion vector for each motion refinement macroblock of a plurality of macroblocks of at least one of an uncompressed field of the video input signal and an uncompressed frame of the video input signal, based on the motion search motion vector.

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North York, Canada

Xinghai Li