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US 2017/0302937 A1Published application
Method and apparatus for processing video signal
AssigneeKt Corporation
InventorsBae Keun LEE, Joo Young KIM
Life of this patent
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Abstract
A video signal processing method according to the present invention is characterised by constructing a palette map for a current block that is encoded in a palette mode; inducing a palette index for each sample of the current block in a pre-determined scan order; and restoring the respective samples of the current bock based on the palette map and the palette index.
Claims15
A method of decoding a video signal, the method comprising:
- constructing a palette map for a current block encoded in a palette mode, the palette map comprising at least one palette entry and a map index that identifies the palette entry;
- deriving a palette index in units of samples of the current block;
- and
- reconstructing a current sample based on an escape mode if a value of the palette index relating to the current sample of the current block is equal to the number of palette entries constituting the palette map of the current block,
- wherein the escape mode is a method of restoring a sample value based on a signaled palette escape value, without using a palette entry of the constructed palette map.
2 more elements
An apparatus of decoding a video signal, the apparatus comprising:
- a restoring unit for constructing a palette map for a current block encoded in a palette mode, deriving a palette index in units of samples of the current block, and reconstructing a current sample based on an escape mode if a value of the palette index relating to the current sample of the current block is equal to the number of palette entries constituting the palette map of the current block,
- wherein the palette map comprises at least one palette entry and a map index that identifies the palette entry, and
- wherein the escape mode is a method of restoring a sample value based on a signaled palette escape value, without using a palette entry of the constructed palette map.
A method of encoding a video signal, the method comprising:
- constructing a palette map for a current block encoded in a palette mode, the palette map comprising at least one palette entry and a map index that identifies the palette entry;
- deriving a palette index in units of samples of the current block;
- and
- reconstructing a current sample based on an escape mode if a value of the palette index relating to the current sample of the current block is equal to the number of palette entries constituting the palette map of the current block,
- wherein the escape mode is a method of restoring a sample value based on a signaled palette escape value, without using a palette entry of the constructed palette map.
2 more elements
An apparatus of encoding a video signal, the apparatus comprising:
- a restoring unit for constructing a palette map for a current block encoded in a palette mode, deriving a palette index in units of samples of the current block, and reconstructing a current sample based on an escape mode if a value of the palette index relating to the current sample of the current block is equal to the number of palette entries constituting the palette map of the current block,
- wherein the palette map comprises at least one palette entry and a map index that identifies the palette entry, and
- wherein the escape mode is a method of restoring a sample value based on a signaled palette escape value, without using a palette entry of the constructed palette map.
Dependencies are inferred from the claim text.