公开(公告)号：US20230118079A1

公开(公告)日：2023-04-20

申请号：US17877540

申请日：2022-07-29

Applicant: ATI TECHNOLOGIES ULC

Inventor： Jun LEI ,  Syed Athar HUSSAIN ,  David I.J. GLEN ,  Rajeevan PANCHACHARAMOORTHY ,  Fatemeh AMIRNAVAEI ,  David GALIFFI ,  Arshad RAHMAN ,  Boris IVANOVIC

IPC: G09G5/12 ,  G06F3/14

Abstract: A display system modifies display cycles of one or more displays to perform a system operation while avoiding visual perturbations at the one or more displays. The display system modifies, synchronizes, or both, blanking periods of the one or more displays such that blanking periods equal or exceed a blackout duration and overlap for at least the blackout duration. Then the system performs the system operation during an overlapping portion of the one or more blanking periods, where the system operation reduces availability of display data at the one or more displays.

公开(公告)号：US20190158836A1

公开(公告)日：2019-05-23

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 ,  H04N19/182 ,  H04N19/139

CPC classification number: H04N19/127 ,  H04N19/132 ,  H04N19/137 ,  H04N19/139 ,  H04N19/154 ,  H04N19/172 ,  H04N19/182

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.

公开(公告)号：US20210375234A1

公开(公告)日：2021-12-02

申请号：US16889318

申请日：2020-06-01

Applicant: ATI TECHNOLOGIES ULC

Inventor： Jun LEI ,  Syed Athar HUSSAIN ,  David I.J. GLEN ,  Rajeevan PANCHACHARAMOORTHY ,  Fatemeh AMIRNAVAEI ,  David GALIFFI ,  Arshad RAHMAN ,  Boris IVANOVIC

IPC: G09G5/12 ,  G06F3/14

Abstract: A display system modifies display cycles of one or more displays to perform a system operation while avoiding visual perturbations at the one or more displays. The display system modifies, synchronizes, or both, blanking periods of the one or more displays such that blanking periods equal or exceed a blackout duration and overlap for at least the blackout duration. Then the system performs the system operation during an overlapping portion of the one or more blanking periods, where the system operation reduces availability of display data at the one or more displays.

公开(公告)号：US20200382791A1

公开(公告)日：2020-12-03

申请号：US16427482

申请日：2019-05-31

Applicant: ATI TECHNOLOGIES ULC

Inventor： Boris IVANOVIC ,  Mehdi SAEEDI ,  Edward G. CALLWAY

IPC: H04N19/14 ,  H04N19/33 ,  H04N19/196 ,  H04N19/176

Abstract: A processing system analyzes pixel activity levels of blocks of a picture at a plurality of spatial scales and/or dynamic ranges to generate a multi-scale metric that indicates how bit allocation or assignment of a given quantization parameter (QP) will affect the perceptual quality of the block. Blocks that have similar multi-scale metrics are likely to be visually similar and to benefit from similar bit allocations or QPs. Based on the multi-scale metric, an encoder encodes each block of the picture with a QP and/or a number of bits.

公开(公告)号：US20200068214A1

公开(公告)日：2020-02-27

申请号：US16113212

申请日：2018-08-27

Applicant: ATI TECHNOLOGIES ULC

Inventor： Mehdi SAEEDI ,  Boris IVANOVIC

IPC: H04N19/513

Abstract: A processing system estimates motion between blocks of images based on differences in pixel activities between blocks. Blocks having similar pixel activities are more likely to be matches for motion estimation than are blocks having dissimilar pixel activities. Accordingly, the processing system compares pixel activity between current block of a current image and candidate blocks within a search area in the reference image, and estimates motion based on a subset of candidate blocks having a difference in pixel activity from that of the current block within a threshold.

公开(公告)号：US20200068197A1

公开(公告)日：2020-02-27

申请号：US16113302

申请日：2018-08-27

Applicant: ATI TECHNOLOGIES ULC

Inventor： Boris IVANOVIC ,  Mehdi SAEEDI

IPC: H04N19/124 ,  H04N19/154

Abstract: A multimedia system allocates, during encoding of a multimedia stream, bits to portions of frames based on quality metrics and bit usages for different quantization parameters (QPs). An encoder of the multimedia system encodes a frame in a first pass with a first QP and in a second pass with a second QP. A comparator of the multimedia system measures and compares quality metrics, such as mean squared error, for each portion of the frame encoded with the first QP and the second QP. The comparator compares the difference between the quality metrics for each portion encoded with each QP to a threshold. If the difference in quality metrics for a portion exceeds the threshold, the comparator selects the portion for inclusion in a subset of portions to be encoded with the second QP.