IP Library › Granted Patent US 12676992
Granted Patent B2
US 12676992 · App. 18/680,552 · Granted Jul 7, 2026

Image decoding method and apparatus for coding image information including picture header

Inventor: Hendry Hendry (Seoul, KR)
Assignee: LG Electronics Inc.
H04N19/174H04N19/188H04N19/44H04N19/70
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12676992
App. No.
18/680,552
Granted
Jul 7, 2026
Kind
B2
Abstract

An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: acquiring a flag indicating whether a picture header (PH) network abstraction layer (NAL) unit exists; acquiring a PH on the basis of the flag; and decoding a current picture related to the PH on the basis of the PH.

Claims (23)

1 . A decoding apparatus for image decoding, the decoding apparatus comprising:

a memory; and

at least one processor connected to the memory, the at least one processor configured to:

obtain a flag for whether a Picture Header (PH) Network Abstraction Layer (NAL) unit is present;

based on the flag representing that the PH NAL unit is present, obtain a PH for a current picture from the PH NAL unit;

based on the flag representing that the PH NAL unit is not present, obtain the PH for the current picture from a slice header for the current picture; and

decode the current picture based on the PH,

wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only one slice.

2 . An encoding apparatus for image encoding, the encoding apparatus comprising:

a memory; and

at least one processor connected to the memory, the at least one processor configured to:

determine whether a Picture Header (PH) Network Abstraction Layer (NAL) unit including a PH related to a current picture is present;

based on the determination that the PH NAL unit is present, generate the PH NAL unit including the PH;

based on the determination that the PH NAL unit is not present, generate a slice header for the current picture including the PH;

generate a flag for whether the PH NAL unit is present based on a result of the determination; and

encode image information including the flag,

wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only one slice.

3 . An apparatus for a bitstream of image information, the apparatus comprising:

at least one processor configured to generate the bitstream, based on the image information comprising a flag for whether a Picture Header (PH) Network Abstraction Layer (NAL) unit is present; and

a transmitter configured to transmit the bitstream of the image information comprising the flag,

wherein based on the flag representing that the PH NAL unit is present, a PH for a current picture is obtained from the PH NAL unit,

wherein based on the flag representing that the PH NAL unit is not present, the PH for the current picture is obtained from a slice header for the current picture, and

wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only one slice.