公开(公告)号：US10523947B2

公开(公告)日：2019-12-31

申请号：US15721078

申请日：2017-09-29

Applicant: ATI Technologies ULC

Inventor： Ihab Amer ,  Boris Ivanovic ,  Gabor Sines ,  Yang Liu ,  Ho Hin Lau ,  Haibo Liu ,  Kyle Plumadore

IPC: H04N7/12 ,  H04N19/137 ,  H04N19/115 ,  H04N19/132 ,  H04N19/177 ,  A63F13/335

Abstract: Systems, apparatuses, and methods for encoding bitstreams of uniquely rendered video frames with variable frame rates are disclosed. A rendering unit and an encoder in a server are coupled via a network to a client with a decoder. The rendering unit dynamically adjusts the frame rate of uniquely rendered frames. Depending on the operating mode, the rendering unit conveys a constant frame rate to the encoder by repeating some frames or the rendering unit conveys a variable frame rate to the encoder by conveying only uniquely rendered frames to the encoder. Depending on the operating mode, the encoder conveys a constant frame rate bitstream to the decoder by encoding repeated frames as skip frames, or the encoder conveys a variable frame rate bitstream to the decoder by dropping repeated frames from the bitstream.

公开(公告)号：US12184871B2

公开(公告)日：2024-12-31

申请号：US18079624

申请日：2022-12-12

Applicant: ADVANCED MICRO DEVICES, INC. ,  ATI TECHNOLOGIES ULC

Inventor： Ying Luo ,  Alvin Duong ,  Edward Harold ,  Wei Gao ,  Shu-Hsien Samuel Wu ,  Haibo Liu ,  Ehsan Mirhadi

IPC: H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/184 ,  H04N19/65

Abstract: An encoder implements a residual-free palette encoding mode in which a block of pixels is used to derive a palette table having a number of palette colors less than a number of pixel colors in the block of pixels, and to derive a color map representing each pixel of the block with a corresponding index number associated with a palette color that most closely matches the pixel's color. The calculations of residuals representing errors between the predicted palette colors and the actual pixel colors are omitted during the encoding process, thereby facilitating implementation of less complex palette mode encoder hardware at the expense of slight loss of color accuracy. Moreover, when multiple encoding modes are available, the encoder can employ the residual-free palette encoding mode when the rate-distortion cost or other cost of using this mode is determined to be the lowest cost of the plurality of encoding modes.

公开(公告)号：US12169729B2

公开(公告)日：2024-12-17

申请号：US17453341

申请日：2021-11-02

Applicant: ATI Technologies ULC

Inventor： Yinan Jiang ,  Ahmed M. Abdelkhalek ,  Guopei Qiao ,  Andy Sung ,  Haibo Liu ,  Dezhi Ming ,  Zhidong Xu

IPC: G06F9/455 ,  G06F9/22 ,  G06F9/48

Abstract: A technique for varying firmware for different virtual functions in a virtualized device is provided. The virtualized device includes a hardware accelerator and a microcontroller that executes firmware. The virtualized device is virtualized in that the virtualized device performs work for different virtual functions (with different virtual functions associated with different virtual machines), each function getting a “time-slice” during which work is performed for that function. To vary the firmware, each time the virtualized device switches from performing work for a current virtual function to work for a subsequent virtual function, one or more microcontrollers of the virtualized device examines memory storing addresses for firmware for the subsequent virtual function and begins executing the firmware for that subsequent virtual function. The addresses for the firmware are provided by a corresponding virtual machine at configuration time.

公开(公告)号：US20240323451A1

公开(公告)日：2024-09-26

申请号：US18189831

申请日：2023-03-24

Applicant: ATI Technologies ULC

Inventor： Ihab M. A. Amer ,  Konstantin Moskvitin ,  Haibo Liu ,  Mehdi Saeedi ,  Ho Hin Lau ,  Mehdi Semsarzadeh

IPC: H04N19/85 ,  H04N19/12 ,  H04N19/13 ,  H04N19/156 ,  H04N19/176 ,  H04N19/61

CPC classification number: H04N19/85 ,  H04N19/12 ,  H04N19/13 ,  H04N19/156 ,  H04N19/176 ,  H04N19/61

Abstract: A technique for performing video operations is provided. The technique includes decoding underlying content to obtain a decoded block; and applying a shade pattern to the decoded block to obtain a final block.

公开(公告)号：US20240195990A1

公开(公告)日：2024-06-13

申请号：US18079624

申请日：2022-12-12

Applicant: ADVANCED MICRO DEVICES, INC. ,  ATI TECHNOLOGIES ULC

Inventor： Ying Luo ,  Alvin Duong ,  Edward Harold ,  Wei Gao ,  Shu-Hsien Samuel Wu ,  Haibo Liu ,  Ehsan Mirhadi

IPC: H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/184 ,  H04N19/65

CPC classification number: H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/184 ,  H04N19/65

Abstract: An encoder implements a residual-free palette encoding mode in which a block of pixels is used to derive a palette table having a number of palette colors less than a number of pixel colors in the block of pixels, and to derive a color map representing each pixel of the block with a corresponding index number associated with a palette color that most closely matches the pixel's color. The calculations of residuals representing errors between the predicted palette colors and the actual pixel colors are omitted during the encoding process, thereby facilitating implementation of less complex palette mode encoder hardware at the expense of slight loss of color accuracy. Moreover, when multiple encoding modes are available, the encoder can employ the residual-free palette encoding mode when the rate-distortion cost or other cost of using this mode is determined to be the lowest cost of the plurality of encoding modes.

公开(公告)号：US20220312029A1

公开(公告)日：2022-09-29

申请号：US17215347

申请日：2021-03-29

Applicant: ATI Technologies ULC

Inventor： Haibo Liu ,  Ihab Amer

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/593 ,  H04N19/182 ,  H04N19/136 ,  H04N19/172

Abstract: Methods and apparatus encode image frames using intra-frame prediction by predicting pixels for a block of current pixels, based on a detected spatial pattern of pixel intensity differences among a plurality of neighboring reconstructed pixels to the block of current pixels, and encode a block of pixels of the image frame using the predicted block of reconstructed pixels. Inter-frame prediction is provided by determining whether blocks of pixels in temporally neighboring reconstructed frames corresponding to a candidate motion vector have a pattern of pixel intensity differences among the blocks from temporally neighboring frames. Predicted blocks are produced for a reconstructed frame based on the determined pattern of pixel intensity difference among temporally neighboring frames.

公开(公告)号：US11368692B2

公开(公告)日：2022-06-21

申请号：US16177128

申请日：2018-10-31

Applicant: ATI Technologies ULC

Inventor： Jinbo Qiu ,  Yang Liu ,  Ihab Amer ,  Lei Zhang ,  Edward A. Harold ,  Zhiqi Hao ,  Jiao Wang ,  Gabor Sines ,  Haibo Liu ,  Boris Ivanovic

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/172

Abstract: Systems, apparatuses, and methods for generating a model for determining a quantization strength to use when encoding video frames are disclosed. A pre-encoder performs multiple encoding passes using different quantization strengths on a portion or the entirety of one or more pre-processed video frames. The pre-encoder captures the bit-size of the encoded output for each of the multiple encoding passes. Then, based on the multiple encoding passes, the pre-encoder generates a model for mapping bit-size to quantization strength for encoding video frames or portion(s) thereof. When the encoder begins the final encoding pass for one or more given video frames or any portion(s) thereof, the encoder uses the model to map a preferred bit-size to a given quantization strength. The encoder uses the given quantization strength when encoding the given video frame(s) or frame portion(s) to meet a specified bit-rate for the encoded bitstream.

公开(公告)号：US11076151B2

公开(公告)日：2021-07-27

申请号：US16588772

申请日：2019-09-30

Applicant: ATI Technologies ULC

Inventor： Feng Pan ,  Wei Gao ,  Yang Liu ,  Crystal Yeong-Pian Sau ,  Haibo Liu ,  Edward A. Harold ,  Ying Luo ,  Ihab Amer ,  Gabor Sines

IPC: H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/115

Abstract: Systems, apparatuses, and methods for calculating multi-pass histograms for palette table derivation include an encoder that calculates a first histogram for a first portion of most significant bits (MSBs) of pixel component values of a block of an image or video frame. Then, the encoder selects a given number of the highest pixel count bins from the first histogram. The encoder then increases the granularity of these selected highest pixel count bins by evaluating one or more additional bits from the pixel component values. A second histogram is calculated for the concatenation of the original first portion MSBs from the highest pixel count bins and the one or more additional bits, and the highest pixel count bins are selected from the second histogram. A palette table is derived based on these highest pixel count bins selected from the second histogram, and the block is encoded using the palette table.

公开(公告)号：US20210099699A1

公开(公告)日：2021-04-01

申请号：US16588772

申请日：2019-09-30

Applicant: ATI Technologies ULC

Inventor： Feng Pan ,  Wei Gao ,  Yang Liu ,  Crystal Yeong-Pian Sau ,  Haibo Liu ,  Edward A. Harold ,  Ying Luo ,  Ihab Amer ,  Gabor Sines

IPC: H04N19/115 ,  H04N19/186 ,  H04N19/182 ,  H04N19/176

Abstract: Systems, apparatuses, and methods for calculating multi-pass histograms for palette table derivation are disclosed. An encoder calculates a first histogram for a first portion of most significant bits (MSBs) of pixel component values of a block of an image or video frame. Then, the encoder selects a given number of the highest pixel count bins from the first histogram. The encoder then increases the granularity of these selected highest pixel count bins by evaluating one or more additional bits from the pixel component values. A second histogram is calculated for the concatenation of the original first portion MSBs from the highest pixel count bins and the one or more additional bits, and the highest pixel count bins are selected from the second histogram. A palette table is derived based on these highest pixel count bins selected from the second histogram, and the block is encoded using the palette table.

公开(公告)号：US10708596B2

公开(公告)日：2020-07-07

申请号：US15818114

申请日：2017-11-20

Applicant: ATI TECHNOLOGIES ULC

Inventor： Ihab Amer ,  Fabio Gulino ,  Edward Harold ,  Boris Ivanovic ,  Haibo Liu ,  Ho Hin Lau ,  Gabor Sines ,  Catalin Beju

IPC: H04N19/127 ,  H04N19/139 ,  H04N19/182 ,  H04N19/137 ,  H04N19/154 ,  H04N19/172 ,  H04N19/132

Abstract: An encoder of a multimedia system encodes data representative of each image in a video stream to form a bitstream that is transmitted over a network to a decoder that decodes the bitstream and provides the decoded information to a multimedia application for display to the user. As consecutive images may have nearly identical pixel values, the multimedia system detects pixel value variations between consecutive images that are below a specified threshold to reduce active processing on such pictures, which includes, for example, encoding, decoding, and post-processing. The multimedia system either selectively encodes or selectively processes the current image that has pixel values that vary from an immediately preceding image within the specified threshold.