Simplification of sub-block transforms in video coding
AssigneeQUALCOMM Incorporated
InventorsVadim Seregin, Chao-Hsiung Hung, Nan Hu, Hilmi Enes Egilmez, Marta Karczewicz
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Abstract
A video coder may apply a sub-block transform for blocks of video data. The video coder is configured to determine when to apply sub-block transforms to blocks of video data based on a ratio of the width and height (or ratio of height and width) of the block. The video coder may also determine when to use different transform kernels for different sub-blocks when applying sub-block transforms.
Claims30
A method of coding video data comprising:
- determining to use a sub-block transform mode for a block based on one or more of a width-to-height ratio or a height-to-width ratio of the block;
- and
- applying one or more transforms to the block based on the determination to use the sub-block transform mode.
An apparatus configured to code video data, the apparatus comprising:
- a memory configured to store a block;
- and
- one or more processors implemented in circuitry and in communication with the memory, the one or more processors configured to:
- determine to use a sub-block transform mode for the block based on one or more of a width-to-height ratio or a height-to-width ratio of the block;
- and
- apply one or more transforms to the block based on the determination to use the sub-block transform mode.
An apparatus configured to code video data, the apparatus comprising:
- means for determining to use a sub-block transform mode for a block based on one or more of a width-to-height ratio or a height-to-width ratio of the block;
- and
- means for applying one or more transforms to the block based on the determination to use the sub-block transform mode.
A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors of a device configured to code video data to:
- determine to use a sub-block transform mode for a block based on one or more of a width-to-height ratio or a height-to-width ratio of the block;
- and
- apply one or more transforms to the block based on the determination to use the sub-block transform mode.
Dependencies are inferred from the claim text.