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RU2015131333A - Способ декодирования видеоданных - Google Patents

Способ декодирования видеоданных Download PDF

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RU2015131333A
RU2015131333A RU2015131333/08A RU2015131333A RU2015131333A RU 2015131333 A RU2015131333 A RU 2015131333A RU 2015131333/08 A RU2015131333/08 A RU 2015131333/08A RU 2015131333 A RU2015131333 A RU 2015131333A RU 2015131333 A RU2015131333 A RU 2015131333A
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block
quantization parameter
motion vector
prediction
quantization
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RU2015131333/08A
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RU2621972C2 (ru
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Соо Ми ОХ
Моонок ЯНГ
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Инфобридж Пте. Лтд.
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Abstract

1. Способ декодирования видеоданных при однонаправленном предсказании, содержащий этапы, на которых:получают индекс опорного изображения и вектор движения текущего элемента предсказания;генерируют блок предсказания текущего элемента предсказания с использованием индекса опорного изображения и вектора движения;генерируют квантованный блок посредством обратного сканирования составляющих квантованных коэффициентов;генерируют преобразованный блок посредством обратного квантования квантованного блока с использованием параметра квантования;генерируют остаточный блок посредством обратного преобразования преобразованного блока игенерируют восстановленные пиксели с использованием блока предсказания и остаточного блока,при этом пиксели предсказания блока предсказания генерируют с использованием интерполирующего фильтра, выбираемого на основе вектора движения, при этом интерполирующий фильтр является фильтром с 7 отводами, если вектор движения указывает положение четверть-пикселя, при этом интерполирующий фильтр является фильтром с 8 отводами, если вектор движения указывает положение полпикселя, ипри этом параметр квантования получают с использованием разностного параметра квантования и предиктора параметра квантования, иесли доступен только один из параметра квантования левого элемента и параметра квантования верхнего элемента, то предиктором параметра квантования является среднее значение параметра квантования предыдущего элемента и упомянутого доступного одного из параметра квантования левого элемента и параметра квантования верхнего элемента, ипри этом, когда размер квантованно

Claims (8)

1. Способ декодирования видеоданных при однонаправленном предсказании, содержащий этапы, на которых:
получают индекс опорного изображения и вектор движения текущего элемента предсказания;
генерируют блок предсказания текущего элемента предсказания с использованием индекса опорного изображения и вектора движения;
генерируют квантованный блок посредством обратного сканирования составляющих квантованных коэффициентов;
генерируют преобразованный блок посредством обратного квантования квантованного блока с использованием параметра квантования;
генерируют остаточный блок посредством обратного преобразования преобразованного блока и
генерируют восстановленные пиксели с использованием блока предсказания и остаточного блока,
при этом пиксели предсказания блока предсказания генерируют с использованием интерполирующего фильтра, выбираемого на основе вектора движения, при этом интерполирующий фильтр является фильтром с 7 отводами, если вектор движения указывает положение четверть-пикселя, при этом интерполирующий фильтр является фильтром с 8 отводами, если вектор движения указывает положение полпикселя, и
при этом параметр квантования получают с использованием разностного параметра квантования и предиктора параметра квантования, и
если доступен только один из параметра квантования левого элемента и параметра квантования верхнего элемента, то предиктором параметра квантования является среднее значение параметра квантования предыдущего элемента и упомянутого доступного одного из параметра квантования левого элемента и параметра квантования верхнего элемента, и
при этом, когда размер квантованного блока больше предварительно определенного размера, посредством обратного сканирования составляющих квантованных коэффициентов генерируют множество поднаборов, и квантованный блок генерируют посредством обратного сканирования упомянутого множества поднаборов с использованием шаблона диагонального сканирования.
2. Способ по п. 1, в котором параметр квантования получают на каждый элемент квантования, и размер элемента квантования является одним из допустимых размеров элемента кодирования.
3. Способ по п. 1, в котором количество отводов интерполирующего фильтра определяют посредством указанного вектором движения положения пикселя предсказания.
4. Способ по п. 1, в котором индекс опорного изображения и вектор движения текущего элемента предсказания являются индексом опорного изображения и вектором движения пространственного или временного варианта слияния, заданного индексом слияния, и
если текущий элемент предсказания является вторым элементом предсказания, разбитым посредством асимметричного разбиения, то пространственный вариант слияния, соответствующий первому элементу предсказания, разбитому посредством асимметричного разбиения, устанавливают в качестве недоступного.
5. Способ по п. 4, в котором, если размер текущего элемента предсказания составляет (3/2)Nx2N, то пространственный вариант слияния слева устанавливают в качестве недоступного.
6. Способ по п. 4, в котором вектор движения временного варианта слияния является вектором движения временного блока-варианта слияния внутри изображения временного варианта слияния, и положение временного блока-варианта слияния определяют в зависимости от положения текущего блока внутри самого большого элемента кодирования (LCU).
7. Способ по п. 1, в котором, если оба из параметра квантования левого элемента и параметра квантования верхнего элемента недоступны, то предиктор параметра квантования устанавливают как параметр квантования предыдущего элемента.
8. Способ по п. 1, в котором предварительно определенным размером является блок 4x4.
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