Method and apparatus for generating and encoding projection-based frame that includes at least one padding region and at least one projection face packed in 360-degree virtual reality projection layout

A video processing method comprising:

• receiving an omnidirectional content corresponding to a sphere;
• obtaining at least one projection face from the omnidirectional content of the sphere, wherein the omnidirectional content of the sphere is mapped onto said at least one projection face via a 360-degree Virtual Reality (360 VR) projection;
• creating, by a conversion circuit, a projection-based frame by generating at least one padding region and packing said at least one projection face and said at least one padding region in a 360 VR projection layout, wherein said at least one projection face packed in the 360 VR projection layout comprises a first projection face;
• said at least one padding region packed in the 360 VR projection layout comprises a first padding region;
• the first padding region connects with the first projection face, and forms at least a portion of one boundary of the 360 VR projection layout;
• and
• encoding the projection-based frame with said at least one projection face and said at least one padding region packed in the 360 VR projection layout to generate a part of a bitstream, wherein said at least one padding region is decoded from the part of the bitstream at a decoding circuit.

A video processing method comprising:

• receiving a part of a bitstream;
• and
• decoding, by a decoding circuit, the part of the bitstream to generate a decoded frame, wherein the decoded frame is a projection-based frame that has projection faces of a three-dimensional object and at least one padding region packed in a 360-degree Virtual Reality (360 VR) projection layout, the projection faces comprise a first projection face and a second projection face, where regarding the three-dimensional object, one side of the first projection face does not connect with one side of the second projection face;
• said at least one padding region packed in the 360 VR projection layout comprises a first padding region, where regarding the 360 VR projection layout, said one side of the first projection face is parallel with said one side of the second projection face, and the first padding region is sandwiched between the first projection face and the second projection face and connects with said one side of the first projection face and said one side of the second projection face for isolating said one side of the first projection face from said one side of the second projection face in the 360 VR projection layout.

A video processing method comprising:

• receiving a part of a bitstream;
• and
• decoding, by a decoding circuit, the part of the bitstream to generate a decoded frame, wherein at least one padding region is decoded from the part of the bitstream at the decoding circuit, the decoded frame is a projection-based frame that has at least one projection face and said at least one padding region packed in a 360-degree Virtual Reality (360 VR) projection layout, said at least one projection face packed in the 360 VR projection layout comprises a first projection face;
• said at least one padding region packed in the 360 VR projection layout comprises a first padding region;
• the first padding region connects with the first projection face, and forms at least one boundary of the 360 VR projection layout.