Granted Patent B2

US 12,200,263 · App. 17/713,995 · Granted Jan 14, 2025

Inventor: Ye-Kui Wang (San Diego, CA)

Assignee: Huawei Technologies Co., Ltd.

H04N19/70H04N19/105H04N19/136H04N19/159H04N19/172H04N19/174H04N19/187H04N19/188H04N19/30H04N19/423H04N19/46H04N19/463H04N19/50H04N19/593

Abstract

Claims (22)

1. A method of decoding implemented by a video decoder, comprising:

receiving a sub-bitstream having a decoded picture buffer (DPB) syntax structure, wherein output layer sets (OLSs) to which the DPB syntax structure applies are specified by a video parameter set (VPS) when the DPB syntax structure is included in the VPS, and wherein the DPB syntax structure applies to an output layer set (OLS) that includes only one layer when the DPB syntax structure is included in a sequence parameter set (SPS);

obtaining the DPB syntax structure for the OLS with the only one layer from the SPS or obtaining the DPB syntax structure for the OLSs from the VPS; and

decoding a picture from the OLS with the only one layer or the OLSs using the DPB syntax structure to obtain a decoded picture.

2. The method of claim 1 , wherein the DPB syntax structure is designated dpb_parameters( ).

3. The method of claim 1 , wherein the only one layer is an i-th layer, and wherein the OLS is an i-th OLS.

4. The method of claim 1 , wherein the DPB syntax structure is present in an i-th dpb_parameters( ) syntax structure in the SPS.

5. The method of claim 1 , wherein the sub-bitstream does not include the VPS when the DPB syntax structure is included in the SPS.

6. The method of claim 1 , further comprising storing the decoded picture in a DPB prior to being displayed.

7. The method of claim 1 , wherein the SPS is referred to by the only one layer in the OLS.

8. The method of claim 1 , further comprising displaying the decoded picture on a display of an electronic device.

9. A decoding device, comprising:

a receiver configured to receive a sub-bitstream having a decoded picture buffer (DPB) syntax structure, wherein output layer sets (OLSs) to which the DPB syntax structure applies are specified by a video parameter set (VPS) when the DPB syntax structure is included in the VPS, and wherein the DPB syntax structure applies to an output layer set (OLS) that includes only one layer when the DPB syntax structure is included in a sequence parameter set (SPS);

a memory coupled to the receiver and storing instructions; and

one or more processors coupled to the memory, the one or more processors configured to execute the instructions to cause the decoding device to:

obtain the DPB syntax structure for the OLS with the only one layer from the SPS or obtaining the DPB syntax structure for the OLSs from the VPS; and

decode a picture from the OLS with the only one layer or the OLSs using the DPB syntax structure to obtain a decoded picture.

10. The decoding device of claim 9 , wherein the DPB syntax structure is designated dpb_parameters( ) wherein the only one layer is the i-th layer, and wherein the OLS is the i-th OLS.

11. The decoding device of claim 9 , wherein the DPB syntax structure is present in an i-th dpb_parameters( ) syntax structure in the SPS.

12. The decoding device of claim 9 , wherein the sub-bitstream does not include the VPS when the DPB syntax structure is included in the SPS.

13. The decoding device of claim 9 , wherein the SPS is referred to by the only one layer in the OLS.

14. The decoding device of claim 9 , further comprising a display configured to display the decoded picture.

Assignments (1)

Continuity (3)

References Cited (125)