RU2016142727A - Способ формирования восстановленного блока - Google Patents
Способ формирования восстановленного блока Download PDFInfo
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- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- 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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- H04N19/103—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 (18)
1. Способ декодирования изображения, включающий:
получение режима внутрикадрового предсказания, используя три режима внутрикадрового предсказания, которые определяют по левому и верхнему режимам внутрикадрового предсказания текущего блока предсказания;
генерацию блока предсказания по режиму внутрикадрового предсказания;
генерацию остаточного блока, используя режим внутрикадрового предсказания; и
генерацию восстановленного блока, используя блок предсказания и остаточный блок,
отличающийся тем, что размер блока предсказания определяют по информации о размере преобразования,
отличающийся тем, что остаточный блок генерируют путем обратного сканирования квантованной информации по коэффициенту, используя модель обратного сканирования, чтобы генерировать квантованный блок путем обратного квантования квантованного блока, используя параметр квантования для генерации преобразованного блока, и путем обратного преобразования квантованного блока,
отличающийся тем, что получение режима внутрикадрового предсказания получают путем конструирования группы наиболее вероятных режимов (МРМ), включающей три режима внутрикадрового предсказания, определенных на основании левого режима внутрикадрового предсказания и верхнего режима внутрикадрового предсказания, путем установки режима внутрикадрового предсказания группы МРМ, определяемой индексом режима предсказания как режима внутрикадрового предсказания текущего блока предсказания, если индикатор группы режимов указывает на группу МРМ, определение режима внутрикадрового предсказания текущего блока предсказания путем сравнения индекса режима предсказания с тремя режимами внутрикадрового предсказания группы МРМ, если индикатор группы режимов не указывает на группу МРМ, 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, определяемых по доступному режиму внутрикадрового предсказания.
2. Способ по п. 1, отличающийся тем, что, если доступным режимом внутрикадрового предсказания является один из направленных режимов внутрикадрового предсказания, усредненный (DC) режим и плоский режим устанавливают как два дополнительных режима внутрикадрового предсказания.
3. Способ по п. 2, отличающийся тем, что, если доступным режимом внутрикадрового предсказания является один из двух ненаправленных режимов внутрикадрового предсказания, другой из двух ненаправленных режимов внутрикадрового предсказания и вертикальный режим устанавливают как два дополнительных режима внутрикадрового предсказания.
4. 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 заданного размера, генерируют и подвергают обратному сканированию некоторое множество поднаборов по модели обратного сканирования, чтобы генерировать квантованный блок.
5. Способ по п. 1, отличающийся тем, что когда доступны два или больше из параметра левого квантования, параметра верхнего квантования и предыдущего параметра квантования, параметр квантования генерируют, используя два доступных параметра квантования, которые определяют в заданном порядке.
6. Способ по п. 5, отличающийся тем, что параметр квантования генерируют путем сложения среднего значения двух доступных параметров квантования и параметра дифференциального квантования, и
отличающийся тем, что параметр дифференциального квантования восстанавливают, используя двоичную строку, указывающую абсолютное значение параметра дифференциального квантования, и двоичный код, указывающий знак параметра дифференциального квантования.
7. Способ по п. 1, отличающийся тем, что тип обратного преобразования определяют на основании размера блока преобразования.
8. Способ по п. 1, отличающийся тем, что, если левый режим внутрикадрового предсказания равен верхнему режиму внутрикадрового предсказания и левый режим внутрикадрового преобразования является одним из двух ненаправленных режимов внутрикадрового предсказания, группа МРМ включает эти два ненаправленных режима внутрикадрового предсказания и вертикальный режим.
9. Способ по п. 1, отличающийся тем, что, если левый режим внутрикадрового предсказания не равен верхнему режиму внутрикадрового предсказания и любой один из левого режима 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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RU2016142725A RU2711467C2 (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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US (8) | US9014262B2 (ru) |
EP (5) | EP2774122B1 (ru) |
JP (6) | JP5789343B2 (ru) |
KR (4) | KR20130049525A (ru) |
CN (8) | CN107613293B (ru) |
AU (5) | AU2012331601B2 (ru) |
BR (4) | BR122020014298B1 (ru) |
CA (7) | CA2849028C (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) | MX356330B (ru) |
MY (6) | MY190530A (ru) |
NO (1) | NO2774122T3 (ru) |
PE (1) | PE20142032A1 (ru) |
PL (2) | PL2774122T3 (ru) |
PT (1) | PT2774122T (ru) |
RS (1) | RS57282B1 (ru) |
RU (5) | RU2710996C2 (ru) |
SG (2) | SG10201607196UA (ru) |
SI (1) | SI2774122T1 (ru) |
TW (6) | TWI699992B (ru) |
WO (1) | WO2013064099A1 (ru) |
ZA (2) | ZA201600849B (ru) |
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DK2763414T3 (da) | 2011-09-29 | 2020-11-30 | Sharp Kk | Billedafkodningsindretning og fremgangsmåde til billedafkodning til udførelse af konvertering af bi-forudsigelse til uni-forudsigelse |
BR112014007494B1 (pt) | 2011-09-29 | 2022-05-31 | Sharp Kabushiki Kaisha | Dispositivo de decodificação de imagem, método de decodificação de imagem, e dispositivo de codificação de imagem |
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