US 12,003,699 B2Granted

Video signal processing method and device using current picture reference

AssigneeHumax Co., Ltd.

InventorsGeonjung Ko, Dongcheol Kim, Juhyung Son, Jaehong Jung, Jinsam Kwak

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Abstract

A video signal processing method comprises: determining a prediction mode of a current block; when the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode, decoding the current block, based on the IBC prediction mode and a reference block included in a first reference block set; and when the prediction mode of the current block is an inter prediction mode, decoding the current block, based on the inter prediction mode and a reference block included in a second reference block set.

Claims18

Dependent claims

A non-transitory computer-readable medium storing computer-readable instructions that, when executed by a processor, cause the processor to execute an encoding method,

the encoding method comprising:
determining whether a prediction mode of a current block is an inter prediction mode or an intra prediction mode,
determining whether the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode;
encoding a bitstreann for decoding the current block based on the prediction mode of the current block,
wherein a set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode comprises some of a set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode,
wherein when a prediction mode parameter indicating whether the prediction mode of the current block is the inter prediction mode or the intra prediction mode is not included in the bitstream:
when a slice to which the current block belongs is a first slice, the prediction mode of the current block is the intra prediction mode,
when the slice to which the current block belongs is a second slice, the prediction mode of the current block is the inter prediction mode,
wherein the first slice is a slice that refers to a current picture as a reference picture,
wherein the second slice is a slice capable of referring to a picture other than the current picture as a reference picture,
wherein the set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode comprises a location of (xCb−1, yCb−1),
wherein the set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode does not comprise the location of (xCb−1, yCb−1), and
wherein a top-left location of the current block is (xCb, yCb).

10 more elements

A video signal decoding device comprising a processor,

wherein the processor is configured to:
determine whether a prediction mode of a current block is an inter prediction mode or an intra prediction mode based on a value of a prediction mode parameter,
wherein when the prediction mode parameter is obtained from a bitstream, the value of the prediction mode parameter is determined by parsing the prediction mode parameter,
determine whether the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode based on a value of an IBC mode parameter,
when the prediction mode of the current block is the IBC prediction mode, decode the current block based on the IBC prediction mode,
when the prediction mode of the current block is the inter prediction mode, decode the current block, based on the inter prediction mode,
wherein a set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode comprises some of a set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode,
wherein when the prediction mode parameter is not obtained from the bitstream:
when a slice to which the current block belongs is a first slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the intra prediction mode,
when the slice to which the current block belongs is a second slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the inter prediction mode,
wherein the first slice is a slice that refers to a current picture as a reference picture,
wherein the second slice is a slice capable of referring to a picture other than the current picture as a reference picture,
wherein the set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode comprises a location of (xCb−1, yCb−1),
wherein the set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode does not comprise the location of (xCb−1, yCb−1), and
wherein a top-left location of the current block is (xCb, yCb).

12 more elements

A video signal encoding device comprising a processor,

wherein the processor is configured to:
obtain a bitstream to be decoded by a decoder using a decoding method,
wherein the decoding method comprising:
determining whether a prediction mode of a current block is an inter prediction mode or an intra prediction mode based on a value of a prediction mode parameter;
wherein when the prediction mode parameter is obtained from the bitstream, the value of the prediction mode parameter is determined by parsing the prediction mode parameter,
determining whether the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode based on a value of an IBC mode parameter;
when the prediction mode of the current block is the IBC prediction mode, decoding the current block based on the IBC prediction mode;
when the prediction mode of the current block is the inter prediction mode, decoding the current block based on the inter prediction mode,
wherein a set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode comprises some of a set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode,
wherein when the prediction mode parameter is not obtained from the bitstream:
when a slice to which the current block belongs is a first slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the intra prediction mode,
when the slice to which the current block belongs is a second slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the inter prediction mode,
wherein the first slice is a slice that refers to a current picture as a reference picture,
wherein the second slice is a slice capable of referring to a picture other than the current picture as a reference picture,
wherein the set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode includes a location of (xCb−1, yCb−1),
wherein the set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode does not comprise the location of (xCb−1, yCb−1), and
wherein a top-left location of the current block is (xCb, yCb).

14 more elements

A video signal decoding method, the method comprising:

determining whether a prediction mode of a current block is an inter prediction mode or an intra prediction mode based on a value of a prediction mode parameter;
wherein when the prediction mode parameter is obtained from a bitstream, the value of the prediction mode parameter is determined by parsing the prediction mode parameter,
determining whether the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode based on a value of an IBC mode parameter;
when the prediction mode of the current block is the IBC prediction mode, decoding the current block based on the IBC prediction mode;
when the prediction mode of the current block is the inter prediction mode, decoding the current block based on the inter prediction mode,
wherein a set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode comprises some of a set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode,
wherein when the prediction mode parameter is not obtained from the bitstream:
when a slice to which the current block belongs is a first slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the intra prediction mode,
when the slice to which the current block belongs is a second slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the inter prediction mode,
wherein the first slice is a slice that refers to a current picture as a reference picture,
wherein the second slice is a slice capable of referring to a picture other than the current picture as a reference picture,
wherein the set of spatial neighbor locations referred to for decoding the current block in the inter prediction mode includes a location of (xCb−1, yCb−1),
wherein the set of spatial neighbor locations referred to for decoding the current block in the IBC prediction mode does not comprise the location of (xCb−1, yCb−1), and
wherein a top-left location of the current block is (xCb, yCb).

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/343,258Filed 9 Jun 2021 · continuation
Priority: KR 10-2018-016043212 Dec 2018
Published: US 2021/0297662 A123 Sep 2021
Granted: 4 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04N 19/105
Selection of coding mode or of prediction mode: selection of the reference unit for prediction within a chosen coding or prediction mode, e.g.…
H04N 19/159
Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter:…
H04N 19/174
The unit being an image region, e.g. an object: the region being a slice, e.g. a line of blocks or a group of blocks
H04N 19/176
The unit being an image region, e.g. an object: the region being a block, e.g. a macroblock

Family

PCT/KR2019/017639Parent of this continuation · filed 12 Dec 2019
US 2021/0297662 A1Pre-grant publication · published 23 Sep 2021
US 12,003,699 B2This patent

From the US filing history. Foreign family members aren’t listed.

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