Gradual decoding refresh in video coding
AssigneeHuawei Technologies Co., Ltd.
InventorsF N U Hendry, Ye-Kui Wang, Jianle Chen
Life of this patent
Estimating the term…
Abstract
A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes the video decoder determining whether a gradual decoding refresh (GDR) picture in the coded video bitstream is an initial picture in decoding order or the initial picture following an end of sequence (EOS) network abstraction layer (NAL) unit in the decoding order; setting a flag to a value to prevent the GDR picture from being output when the GDR picture is the initial picture in decoding order or the initial picture following the EOS NAL unit in the decoding order; decoding the GDR picture; and storing the GDR picture in a decoded picture buffer (DPB).
Claims17
A method implemented by an encoder, the method comprising:
- determining whether a gradual decoding refresh (GDR) picture in a bitstream is an initial picture of a layer in the bitstream in decoding order or is the initial picture of the layer following an end of sequence (EOS) network abstraction layer (NAL) unit in the decoding order;
- setting a flag to a value of one (1) to prevent the GDR picture from being output when the GDR picture is the initial picture in the decoding order or the initial picture following the EOS NAL unit in the decoding order;
- storing the GDR picture in a decoded picture buffer (DPB);
- and
- producing the bitstream.
An encoder comprising:
- one or more processors configured to:
- determine whether a gradual decoding refresh (GDR) picture in a bitstream is an initial picture of a layer in the bitstream in decoding order or is the initial picture of the layer following an end of sequence (EOS) network abstraction layer (NAL) unit in the decoding order;
- and
- set a flag to a value of one (1) to prevent the GDR picture from being output when the GDR picture is the initial picture in the decoding order or the initial picture following the EOS NAL unit in the decoding order;
- a memory coupled to the processor and configured to:
- store the GDR picture in a decoded picture buffer (DPB);
- and
- store the bitstream.
A non-transitory storage medium storing a bitstream that, when parsed by a coding device, is used by the coding device to generate a video, the bitstream comprising,
- a plurality of syntax elements;
- a gradual decoding refresh (GDR) picture, wherein the GDR picture is an initial picture of a layer in the bitstream in decoding order or is the initial picture of the layer following an end of sequence (EOS) network abstraction layer (NAL) unit in the decoding order;
- and
- a flag, wherein the flag is set to a value of one (1) to prevent the GDR picture from being output when the GDR picture is the initial picture in the decoding order or the initial picture following the EOS NAL unit in the decoding order.
Dependencies are inferred from the claim text.