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    Method and apparatus for determining the severity of corruption in a picture
    1.
    发明授权
    Method and apparatus for determining the severity of corruption in a picture 有权

    公开(公告)号：US10771818B2

    公开(公告)日：2020-09-08

    申请号：US16409415

    申请日：2019-05-10

    Applicant: ATI TECHNOLOGIES ULC

    Inventor： Ihab Amer ,  Gabor Sines ,  Khaled Mammou ,  Haibo Liu ,  Edward Harold ,  Lei Zhang ,  Fabio Gulino ,  Ehsan Mirhadi ,  Ho Hin Lau

    IPC: H04N19/65 ,  H04N21/44 ,  H04N19/44 ,  H04N21/442 ,  H04N21/6375

    Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.

    Method and apparatus for determining the severity of corruption in a picture
    2.
    发明授权
    Method and apparatus for determining the severity of corruption in a picture 有权

    公开(公告)号：US10334276B2

    公开(公告)日：2019-06-25

    申请号：US14981835

    申请日：2015-12-28

    Applicant: ATI TECHNOLOGIES ULC

    Inventor： Ihab Amer ,  Gabor Sines ,  Khaled Mammou ,  Haibo Liu ,  Edward Harold ,  Lei Zhang ,  Fabio Gulino ,  Ehsan Mirhadi ,  Ho Hin Lau

    IPC: H04N19/44 ,  H04N19/65 ,  H04N21/44 ,  H04N21/442 ,  H04N21/6375

    Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.

    METHOD AND APPARATUS FOR DETERMINING THE SEVERITY OF CORRUPTION IN A PICTURE
    3.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING THE SEVERITY OF CORRUPTION IN A PICTURE 审中-公开

    公开(公告)号：US20170188051A1

    公开(公告)日：2017-06-29

    申请号：US14981835

    申请日：2015-12-28

    Applicant: ATI TECHNOLOGIES ULC

    Inventor： Ihab Amer ,  Gabor Sines ,  Khaled Mammou ,  Haibo Liu ,  Edward Harold ,  Lei Zhang ,  Fabio Gulino ,  Ehsan Mirhadi ,  Ho Hin Lau

    IPC: H04N19/65 ,  H04N19/44

    CPC classification number: H04N19/65 ,  H04N19/44 ,  H04N21/44008 ,  H04N21/44209 ,  H04N21/6375

    Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.

    Residual-free palatte mode coding
    5.
    发明授权
    Residual-free palatte mode coding 有权

    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.

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