RU2016142728A - Способ формирования восстановленного блока - Google Patents
Способ формирования восстановленного блока Download PDFInfo
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- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
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- H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
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- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
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Claims (13)
1. Способ генерации восстановленного блока, включающий:
получение режима внутрикадрового предсказания путем использования группы наиболее вероятных режимов (МРМ), включающей три режима внутрикадрового предсказания, которые определяют на левом и верхнем режимах внутрикадрового предсказания текущего блока предсказания;
генерацию блока предсказания по режиму внутрикадрового предсказания;
генерацию остаточного блока путем обратного сканирования значимых флагов, знаков коэффициентов и уровней коэффициентов по модели обратного сканирования, чтобы генерировать квантованный блок путем обратного квантования квантованного блока с использованием параметра квантования для генерации преобразованного блока и путем обратного преобразования преобразованного блока с использованием матрицы обратного преобразования, определенной на основании размера блока преобразования; и генерацию восстановленного блока с использованием блок предсказания и остаточного блока, причем размер блока предсказания определяют по информации размера преобразования,
отличающийся тем, что, когда левый режим внутрикадрового предсказания равен верхнему режиму внутрикадрового предсказания, группа МРМ включает два ненаправленных режима внутрикадрового предсказания и вертикальный режим, если левый режим внутрикадрового предсказания является одним из двух ненаправленных режимов внутрикадрового предсказания, и группа МРМ включает левый режим внутрикадрового предсказания и два направленных режима внутрикадрового предсказания, если левый режим внутрикадрового предсказания является одним из направленных режимов внутрикадрового предсказания, и
отличающийся тем, что, если доступен только один из левого режима внутрикадрового предсказания и верхнего режима внутрикадрового предсказания, группа МРМ включает доступный режим внутрикадрового предсказания и два дополнительных режима внутрикадрового предсказания, определенных по доступному режиму внутрикадрового предсказания.
2. Способ по п. 1, отличающийся тем, что режим внутрикадрового предсказания получают путем конструирования группы МРМ, путем установки режима внутрикадрового предсказания группы МРМ, определенного индексом режима предсказания как режим внутрикадрового предсказания текущего блока предсказания, если индикатор группы режимов укажет на группу МРМ, и путем определения режима внутрикадрового предсказания текущего блока предсказания путем сравнения индекса режима предсказания с тремя режимами внутрикадрового предсказания группы МРМ, если индикатор группы режимов не укажет на группу МРМ.
3. Способ по п. 1, отличающийся тем, что, если доступный режим внутрикадрового предсказания является одним из направленных режимов внутрикадрового предсказания, усредненный (DC) режим и плоский режим устанавливают как два дополнительных режима внутрикадрового предсказания.
4. Способ по п. 3, отличающийся тем, что, если доступный режим внутрикадрового предсказания является одним из ненаправленных режимов внутрикадрового предсказания, другие два ненаправленных режима внутрикадрового предсказания и вертикальный режим устанавливают как два дополнительных режима внутрикадрового предсказания.
5. Способ по п. 1, отличающийся тем, что модель обратного сканирования выбирают из диагонального сканирования, вертикального сканирования и горизонтального сканирования на основании режима внутрикадрового предсказания и информации по размеру преобразования, и когда размер квантованного блока больше чем заданный размер, генерируют и подвергают обратному сканированию некоторое множество поднаборов по модели обратного сканирования, чтобы генерировать квантованный блок.
6. Способ по п. 1, отличающийся тем, что, когда доступны два или больше из левого параметра квантования, верхнего параметра квантования и предыдущего параметра квантования, параметр квантования генерируют, используя два доступных параметра квантования, которые определяют в заданном порядке.
7. Способ по п. 6, отличающийся тем, что параметр квантования генерируют путем сложения среднего значения двух доступных параметров квантования и параметра дифференциального квантования, параметр дифференциального квантования устанавливают, используя двоичную строку, указывающую абсолютное значение параметра дифференциального квантования, и двоичный код, указывающий знак параметра дифференциального квантования.
8. Способ по п. 1, отличающийся тем, что, если левый режим внутрикадрового предсказания не равен верхнему режиму внутрикадрового предсказания и любой один из левого режима внутрикадрового предсказания и верхнего режима внутрикадрового предсказания не равен плоскому режиму, группа МРМ включает левый режим внутрикадрового предсказания, верхний режим внутрикадрового предсказания и плоский режим.
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KR1020110114609A KR20130049525A (ko) | 2011-11-04 | 2011-11-04 | 잔차 블록 복원을 위한 역변환 방법 |
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RU2016142728A3 RU2016142728A3 (ru) | 2019-10-31 |
RU2710996C2 RU2710996C2 (ru) | 2020-01-14 |
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RU2016142727A RU2710995C2 (ru) | 2011-11-04 | 2012-11-02 | Способ формирования восстановленного блока |
RU2016142729A RU2711306C2 (ru) | 2011-11-04 | 2012-11-02 | Способ формирования восстановленного блока |
RU2014111828/08A RU2604340C2 (ru) | 2011-11-04 | 2012-11-02 | Способ формирования восстановленного блока |
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RU2016142727A RU2710995C2 (ru) | 2011-11-04 | 2012-11-02 | Способ формирования восстановленного блока |
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US (8) | US9014262B2 (ru) |
EP (5) | EP3346447B1 (ru) |
JP (6) | JP5789343B2 (ru) |
KR (4) | KR20130049525A (ru) |
CN (8) | CN107682696B (ru) |
AU (5) | AU2012331601B2 (ru) |
BR (4) | BR122020014293B1 (ru) |
CA (7) | CA2913567C (ru) |
CY (1) | CY1120400T1 (ru) |
DK (1) | DK2774122T3 (ru) |
ES (2) | ES2669502T3 (ru) |
HR (1) | HRP20181016T1 (ru) |
HU (2) | HUE054637T2 (ru) |
IL (5) | IL231705A (ru) |
IN (1) | IN2014CN03908A (ru) |
LT (1) | LT2774122T (ru) |
MX (7) | MX340474B (ru) |
MY (6) | MY190516A (ru) |
NO (1) | NO2774122T3 (ru) |
PE (1) | PE20142032A1 (ru) |
PL (2) | PL3346447T3 (ru) |
PT (1) | PT2774122T (ru) |
RS (1) | RS57282B1 (ru) |
RU (5) | RU2711467C2 (ru) |
SG (2) | SG10201607196UA (ru) |
SI (1) | SI2774122T1 (ru) |
TW (6) | TWI650001B (ru) |
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ZA (2) | ZA201600849B (ru) |
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EP2763414B1 (en) | 2011-09-29 | 2020-09-23 | Sharp Kabushiki Kaisha | Image decoding device and image decoding method for performing bi-prediction to uni-prediction conversion |
JP5972888B2 (ja) | 2011-09-29 | 2016-08-17 | シャープ株式会社 | 画像復号装置、画像復号方法および画像符号化装置 |
ES2950262T3 (es) | 2011-10-18 | 2023-10-06 | Lg Electronics Inc | Método de intra predicción y medio de almacenamiento |
WO2013062193A1 (ko) | 2011-10-24 | 2013-05-02 | (주)인터앱 | 영상 복호화 방법 및 장치 |
EP3917147A1 (en) * | 2011-10-24 | 2021-12-01 | Innotive Ltd | Image decoding apparatus |
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