JPWO2020094058A5 - - Google Patents

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JPWO2020094058A5
JPWO2020094058A5 JP2021523502A JP2021523502A JPWO2020094058A5 JP WO2020094058 A5 JPWO2020094058 A5 JP WO2020094058A5 JP 2021523502 A JP2021523502 A JP 2021523502A JP 2021523502 A JP2021523502 A JP 2021523502A JP WO2020094058 A5 JPWO2020094058 A5 JP WO2020094058A5
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chroma
block
adjacent
current video
samples
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Priority claimed from PCT/CN2019/115992 external-priority patent/WO2020094058A1/en
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映像データを処理するコーディング方法であって、
クロマブロックである映像の現在映像ブロックと前記映像のビットストリームとの間での変換のために、少なくとも選択されたクロマサンプルに基づいて、クロスコンポーネント線形モデルのパラメータを決定するステップであり、前記選択されたクロマサンプルは、隣接クロマサンプルのグループから、前記隣接クロマサンプルの位置と前記現在映像ブロックの予測モードとに基づいて選択される、ステップと、
前記決定に基づいて前記現在映像ブロックをコーディングするステップと、
を有する方法。
A coding method for processing video data
The step of determining the parameters of the cross-component linear model, at least based on the selected chroma sample, for the conversion between the current video block of the video, which is the chroma block, and the bitstream of the video, said selection. The resulting chroma sample is selected from the group of adjacent chroma samples based on the position of the adjacent chroma sample and the prediction mode of the current video block.
The step of coding the current video block based on the decision,
How to have.
前記グループの隣接クロマサンプルのうち少なくとも1つの隣接クロマサンプルは、前記現在ブロックの寸法に基づいて前記選択されたクロマサンプルに属さない、請求項1に記載の方法。 The method of claim 1, wherein at least one of the adjacent chroma samples in the group does not belong to the selected chroma sample based on the dimensions of the current block. 前記現在映像ブロックの予測モードが、左の隣接サンプルのみを使用する第1の線形モードである場合、前記選択されたクロマサンプルの全てが前記現在ブロックの左にある、請求項1に記載の方法。 The method of claim 1, wherein if the prediction mode of the current video block is a first linear mode using only the left adjacent sample, then all of the selected chroma samples are to the left of the current block. .. 前記第1の線形モードで使用される前記グループの隣接クロマサンプルの数は、左下の隣接クロマサンプルが利用可能である場合にHよりも多く、Hは前記現在映像ブロックの高さである、請求項3に記載の方法。 The number of adjacent chroma samples in the group used in the first linear mode is greater than H if the lower left adjacent chroma samples are available, where H is the height of the current video block, claim. Item 3. The method according to Item 3. 前記現在映像ブロックの予測モードが、上の隣接サンプルのみを使用する第2の線形モードである場合、前記選択されたクロマサンプルの全てが前記現在ブロックの上にある、請求項1に記載の方法。 The method of claim 1, wherein if the prediction mode of the current video block is a second linear mode using only the adjacent samples above, then all of the selected chroma samples are above the current block. .. 前記第2の線形モードで使用される前記選択されたクロマサンプルの数は、右上の隣接クロマサンプルが利用可能である場合にWよりも多く、Wは前記現在映像ブロックの幅である、請求項5に記載の方法。 Claim that the number of selected chroma samples used in the second linear mode is greater than W if an adjacent chroma sample in the upper right is available, where W is the width of the current video block. The method according to 5. 前記クロマサンプルの位置は、前記クロマブロックの幅又は高さに基づいて選択される、請求項1に記載の方法。 The method of claim 1, wherein the position of the chroma sample is selected based on the width or height of the chroma block. 前記パラメータの決定は更に二点法に基づく、請求項1乃至7のいずれか一項に記載の方法。 The method according to any one of claims 1 to 7, wherein the determination of the parameters is further based on a two-point method. 前記現在映像ブロックは、線形イントラ予測モードを使用してコーディングされ、前記現在映像ブロックの左上サンプルは(x,y)であり、前記少なくとも1つのサンプルは(x-1,y+d)であり、dは範囲[T,S]内の整数であり、T及びSは整数である、請求項1乃至8のいずれか一項に記載の方法。 The current video block is coded using a linear intra-prediction mode, the upper left sample of the current video block is (x, y), the at least one sample is (x-1, y + d), d. The method according to any one of claims 1 to 8, wherein is an integer in the range [T, S], and T and S are integers. 前記グループの隣接クロマサンプルのうち少なくとも1つの隣接クロマサンプルは、2×W個の上の隣接クロマサンプル又は2×H個の左の隣接クロマサンプルを超えて位置する、請求項1に記載の方法。 The method of claim 1, wherein at least one of the adjacent chroma samples in the group is located beyond 2 × W adjacent chroma samples or 2 × H adjacent adjacent chroma samples on the left. .. 前記変換の実行は、前記現在ブロックから前記ビットストリームを生成することを含む、請求項1乃至10のいずれか一項に記載の方法。 The method of any one of claims 1-10, wherein performing the conversion comprises generating the bitstream from the current block. 前記変換の実行は、前記ビットストリームから前記現在ブロックを生成することを含む、請求項1乃至10のいずれか一項に記載の方法。 The method of any one of claims 1-10, wherein performing the conversion comprises generating the current block from the bitstream. プロセッサと、命令を有する非一時的なメモリとを有した、映像データを処理する装置であって、前記命令は、前記プロセッサによって実行されると、前記プロセッサに、
クロマブロックである映像の現在映像ブロックと前記映像のビットストリームとの間での変換のために、少なくとも選択されたクロマサンプルに基づいて、クロスコンポーネント線形モデルのパラメータを決定させ、前記選択されたクロマサンプルは、隣接クロマサンプルのグループから、前記隣接クロマサンプルの位置と前記現在映像ブロックの予測モードとに基づいて選択され、
前記決定に基づいて前記現在映像ブロックをコーディングさせる、
装置。
A device for processing video data, having a processor and a non-temporary memory having instructions, the instructions to the processor when executed by the processor.
For the conversion between the current video block of the video, which is the chroma block, and the bitstream of the video, the parameters of the cross-component linear model are determined based on at least the selected chroma sample, and the selected chroma. Samples are selected from the group of adjacent chroma samples based on the location of the adjacent chroma samples and the prediction mode of the current video block.
Coding the current video block based on the decision,
Device.
命令を格納した非一時的なコンピュータ読み取り可能記憶媒体であって、前記命令は、プロセッサに、
クロマブロックである映像の現在映像ブロックと前記映像のビットストリームとの間での変換のために、少なくとも選択されたクロマサンプルに基づいて、クロスコンポーネント線形モデルのパラメータを決定させ、前記選択されたクロマサンプルは、隣接クロマサンプルのグループから、前記隣接クロマサンプルの位置と前記現在映像ブロックの予測モードとに基づいて選択され、
前記決定に基づいて前記現在映像ブロックをコーディングさせる、
コンピュータ読み取り可能記憶媒体。
A non-temporary computer-readable storage medium that stores instructions, the instructions to the processor.
For the conversion between the current video block of the video, which is the chroma block, and the bitstream of the video, the parameters of the cross-component linear model are determined based on at least the selected chroma sample, and the selected chroma. Samples are selected from the group of adjacent chroma samples based on the location of the adjacent chroma samples and the prediction mode of the current video block.
Coding the current video block based on the decision,
Computer-readable storage medium.
映像処理装置により実行される方法によって生成された映像のビットストリームを格納した非一時的なコンピュータ読み取り可能記録媒体であって、前記方法は、
少なくとも選択されたクロマサンプルに基づいて、クロスコンポーネント線形モデルのパラメータを決定するステップであり、前記選択されたクロマサンプルは、隣接クロマサンプルのグループから、前記隣接クロマサンプルの位置と前記現在映像ブロックの予測モードとに基づいて選択される、ステップと、
前記決定に基づいて前記ビットストリームを生成するステップと、
を有する、コンピュータ読み取り可能記録媒体。
A non-temporary computer-readable recording medium containing a bitstream of video produced by a method performed by a video processing apparatus, wherein the method is:
It is a step of determining the parameters of the cross-component linear model based on at least the selected chroma sample, wherein the selected chroma sample is from the group of adjacent chroma samples, the position of the adjacent chroma sample and the current video block. Steps and steps selected based on the prediction mode and
The step of generating the bitstream based on the determination,
A computer-readable recording medium that has.
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