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    Control and use of chroma quantization parameter values
    21.
    发明授权
    Control and use of chroma quantization parameter values 有权

    公开(公告)号：US12177436B2

    公开(公告)日：2024-12-24

    申请号：US17890496

    申请日：2022-08-18

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Gary J. Sullivan ,  Sandeep Kanumuri

    IPC: H04N19/124 ,  H04N19/126 ,  H04N19/174 ,  H04N19/186 ,  H04N19/44 ,  H04N19/70 ,  H04N19/146

    Abstract: Innovations in control and use of chroma quantization parameter (“QP”) values that depend on luma QP values. More generally, the innovations relate to control and use of QP values for a secondary color component that depend on QP values for a primary color component. For example, during encoding, an encoder determines a QP index from a primary component QP and secondary component QP offset. The encoder maps the QP index to a secondary component QP, which has an extended range. The encoder outputs at least part of a bitstream including the encoded content. A corresponding decoder receives at least part of a bitstream including encoded content. During decoding, the decoder determines a QP index from a primary component QP and secondary component QP offset, then maps the QP index to a secondary component QP, which has an extended range.

    CONDITIONAL SIGNALLING OF REFERENCE PICTURE LIST MODIFICATION INFORMATION
    26.
    发明申请
    CONDITIONAL SIGNALLING OF REFERENCE PICTURE LIST MODIFICATION INFORMATION 有权

    公开(公告)号：US20220329850A1

    公开(公告)日：2022-10-13

    申请号：US17845346

    申请日：2022-06-21

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Gary J. Sullivan ,  Sandeep Kanumuri

    IPC: H04N19/58 ,  H04N19/503 ,  H04N19/70 ,  H04N19/134 ,  H04N19/109 ,  H04N19/573 ,  H04N19/105 ,  H04N19/46 ,  H04N19/85

    Abstract: Innovations in signaling of reference picture list (“RPL”) modification information. For example, a video encoder evaluates a condition that depends at least in part on a variable indicating a number of total reference pictures. Depending on the results of the evaluation, the encoder signals in a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. A video decoder evaluates the condition and, depending on results of the evaluation, parses from a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. The condition can be evaluated as part of processing for an RPL modification structure that includes the flag, or as part of processing for a slice header. The encoder and decoder can also evaluate other conditions that affect syntax elements for list entries of the RPL modification information.

    CONDITIONAL SIGNALLING OF REFERENCE PICTURE LIST MODIFICATION INFORMATION
    27.
    发明申请
    CONDITIONAL SIGNALLING OF REFERENCE PICTURE LIST MODIFICATION INFORMATION 有权

    公开(公告)号：US20220321908A1

    公开(公告)日：2022-10-06

    申请号：US17845372

    申请日：2022-06-21

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Gary J. Sullivan ,  Sandeep Kanumuri

    IPC: H04N19/58 ,  H04N19/503 ,  H04N19/70 ,  H04N19/134 ,  H04N19/109 ,  H04N19/573 ,  H04N19/105 ,  H04N19/46 ,  H04N19/85

    Abstract: Innovations in signaling of reference picture list (“RPL”) modification information. For example, a video encoder evaluates a condition that depends at least in part on a variable indicating a number of total reference pictures. Depending on the results of the evaluation, the encoder signals in a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. A video decoder evaluates the condition and, depending on results of the evaluation, parses from a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. The condition can be evaluated as part of processing for an RPL modification structure that includes the flag, or as part of processing for a slice header. The encoder and decoder can also evaluate other conditions that affect syntax elements for list entries of the RPL modification information.

    Conditional signalling of reference picture list modification information
    29.
    发明授权
    Conditional signalling of reference picture list modification information 有权

    公开(公告)号：US10560720B2

    公开(公告)日：2020-02-11

    申请号：US16191843

    申请日：2018-11-15

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Gary J. Sullivan ,  Sandeep Kanumuri

    IPC: H04N19/00 ,  H04N19/58 ,  H04N19/105 ,  H04N19/46 ,  H04N19/503 ,  H04N19/70 ,  H04N19/134 ,  H04N19/109 ,  H04N19/573 ,  H04N19/85

    Abstract: Innovations in signaling of reference picture list (“RPL”) modification information. For example, a video encoder evaluates a condition that depends at least in part on a variable indicating a number of total reference pictures. Depending on the results of the evaluation, the encoder signals in a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. A video decoder evaluates the condition and, depending on results of the evaluation, parses from a bitstream a flag that indicates whether an RPL is modified according to syntax elements explicitly signaled in the bitstream. The condition can be evaluated as part of processing for an RPL, modification structure that includes the flag, or as part of processing for a slice header. The encoder and decoder can also evaluate other conditions that affect syntax elements for list entries of the RPL modification information.

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