Ati Technologies Ulc

Advanced Micro Devices Corporation

Ihab M A Amer

Khaled Mammou

Gabor Sines

Wei Gao

Crystal Yeong-Pian Sau

Lei Zhang

Edward A Harold

Feng Pan

Yang Liu

Haibo Liu

Dong Liu

Ying Luo

Ahmed M Abdelkhalek

Benedict Chien

Boris Ivanovic

Syed Athar Hussain

Mingkai Shao

Shu-Hsien Wu

Jinbo Qiu

Ping Chen

Zhiqi Hao

Ehsan Mirhadi

Sonu Thomas

Sunil Gopal Koteyar

Vladyslav S Zakharchenko

Dmytro U Elperin

Stephen A J Bagshaw

Steven Lok-Man Doo

Naveed A Gazi

Jonathon Walter Riley

John-Paul A Compagnone

Gerald S C Chan

Li Baochun

A processing apparatus and video encoding method are provided which include receiving a portion of a video sequence and determining complexities for blocks of pixels of the portion of the video sequence. Quantization parameter values for corresponding blocks of pixels are selected based on complexities of the corresponding blocks and visually perceived coding artifacts of the corresponding blocks produced by the quantization parameter values. The blocks of pixels are encoded, using the selected quantization parameter values. The blocks of pixels are decoded and the portion of the video sequence is provided for display.

Quantization parameter map for video encoding with constant perceptual quality

Disclosed herein is a region-based reference management system using in video frame encoding. Source content, such as video game streaming or remote desktop sharing, that includes scene changes or significant instantaneous changes in a region from one frame to the next can present encoding challenges. Techniques disclosed herein use hints about changes in regional frame content, dissect frame content into regions, and associate the dissected regions with stored reference frame data using the hints and information about the regions to more efficiently encode frames.

Region-based reference frame management

A technique for encoding video is provided. The technique includes for a first portion of a first frame that is encoded by a first encoder in parallel with a second portion of the first frame that is encoded by a second encoder, determining a historical complexity distribution; determining a first bit budget for the first portion of the first frame based on the historical complexity distribution; and encoding the first portion of the first frame by the first encoder, based on the first bit budget.

Assigning bit budgets to parallel encoded video data

Methods and devices are provided for encoding a video stream which comprise encoding a plurality of frames of video acquired from different points of view, generating statistical values for the frames of video determined from values of pixels of the frames, generating, for each of the plurality of frames, a perceptual hash value based on statistical values of the frame and encoding a current frame comprising video acquired from a corresponding one of the different points of view using a previously encoded reference frame based on a similarity of perceptual hashes of the current frame and the previously encoded reference frame.

Identifying long term reference frame using scene detection and perceptual hashing

An encoding method is provided which includes receiving a plurality of images, obtaining values of elements in a portion of the images, sorting the elements according to different values of the elements, sorting the elements according to a number of occurrences of the different values and encoding the elements using a subset of the different values having corresponding numbers of occurrences that are higher than corresponding numbers of occurrences of other values. Examples also include a processing device and method for use with palette mode encoding in which the elements are a portion of pixels in images and the values are color values of the portion of pixels in the images.

Top palette colors selection using sorting for palette mode in video encoding

An apparatus and methods for controlling power consumption in video encoding obtain, before motion estimation is performed on an image frame to be encoded, information regarding an amount of the image frame to be encoded that is static with respect to a previously encoded image frame. The apparatus and methods adjust power consumption of the video encoder based on the obtained information regarding the amount of the image frame to be encoded that is static.

Controlling power consumption in video encoding based on information regarding static amount of an image frame

A system and method for dynamically changing encode quality at a block level based on runtime pre-encoding analysis of content in a video stream. A video encoder continuously analyzes the content during runtime, and collects statistics and/or characteristics of the content before encoding it. This classifies the block among pre-defined categories of content, where every category has its own compression parameters.

Hierarchical measurement of spatial activity for text/edge detection

Methods and apparatus of generating a refined reference frame for inter-frame encoding by applying blur parameters to allow encoding of image frames having blurred regions are presented herein. The methods and apparatus may identify a blurred region of an image frame by comparing the image frame with a reference frame, generate a refined reference frame by applying the blur parameter indicative of the blurred region to the reference frame, determine whether to use one of the reference frame and refined reference frame to encode the image frame, and encode the image frame using the refined reference frame when determined to use the refined reference frame.

Methods and apparatus for optical blur modeling for improved video encoding

A method and apparatus to maximize video slice size is described herein. The method packs as many macroblocks as possible within a capped-size slice, while preserving user-defined quality constraints. The probability to conform to the maximum slice size constraint may be adjusted according to a user-defined parameter. The method may be integrated into a rate control process of a video encoder. The method predicts whether encoding a macroblock with a quantization parameter exceeds a current slice size constraint. It further predicts whether encoding a given number of macroblocks with a given configuration of quantization parameters exceeds the current slice size constraint. The method then proceeds to encode the current macroblock either on a condition that encoding the given number of macroblocks with the given configuration of quantization parameters falls below the size constraint of the current slice or after determining that a new slice is needed.

Method for maximizing video slice size constraint

Methods and apparatus that allow encoding of video data in pipelined encoder architectures with reduced encoding performance penalty. The methods and apparatus encode video data without the need to flush the data pipeline and re-encode macroblocks, thus saving time and resulting in an increase in the encoder's throughput. In one embodiment, macroblocks are encoded in a data pipeline to form a first video slice of a plurality of video slices. Once a macroblock overshoot condition occurs, the overshooting macroblock is determined and a second video slice is formed that includes at least one of the overshooting macroblock and the encoded macroblocks without re-encoding the included overshooting macroblock and encoded macroblocks. For example, a second video slice may be formed from the overshooting macroblock, and any remaining encoded macroblocks, that do not form the first video slice.

Technique to constrain a video slice size with reduced performance penalty on pipelined encoder architectures

Disclosed is a low-complexity and yet efficient lossy method to compress distortion information for motion estimation, resulting in significant reduction in needed storage capacity. A system for implementing the method and a computer-readable medium for storing the method are also disclosed. The method includes determining and storing a distortion value for each trial motion vector in a plurality of trial motion vectors. Each trial motion vector specifies a position of a search region relative to a reference frame. The method further includes compressing each of the distortion values as a fixed number of bits based upon a minimum distortion value amongst the stored distortion values, and re-storing each compressed distortion value in place of its uncompressed value.

Efficient low-complexity video compression

A method, system, and computer program product that exploits motion hints associated with rendered video frames. These motion hints are provided to a video encoder to guide a motion-compensation prediction process performed by the video encoder. Specifically, these motion hints can be used to better position a search window in a reference video frame to better capture the motion of a block of pixels in the reference video frame. Because the search window is better positioned in the reference video frame, the memory required to perform the encoding process can be reduced without sacrificing the level of encoded image quality.

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Markham, Canada

Ihab M A Amer