Method and apparatus of camera parameter signaling in 3D video coding

A method of encoding three-dimensional video data for a video encoder, the method comprising:

• receiving current texture data or depth data associated with a current layer in a dependent view;
• determining a control flag whether to incorporate camera parameters into a video bitstream for the current layer, wherein the camera parameters are related to different views and are signaled per view, wherein the control flag is derived based on:
• (i) a combination of another control flag and individual control flags;
• and
• (ii) one or more depth-oriented coding tools selected from a coding tool group, wherein the coding tool group comprises view synthesis prediction and depth-oriented neighboring block disparity vector,
• wherein said another control flag is used to indicate a need to signal the camera parameters for the current layer, and wherein said individual control flags are associated with multiple ones of the depth-oriented coding tools is configured to convert depth values into disparity values using the camera parameters, and
• wherein the individual control flags associated with said multiple ones of the depth-oriented coding tools are signaled in a view level, picture level, or slice level of the video bitstream;
• incorporating information associated with the camera parameters in the video bitstream if the control flag indicates that the camera parameters are signaled for the current layer;
• encoding the current texture data or depth data in the current layer utilizing the camera parameters to generate compressed data to incorporate into the video bitstream if the control flag indicates that the camera parameters are signaled for the current layer;
• and
• providing the video bitstream.

A method of decoding three-dimensional video data for a video decoder, the method comprising:

• receiving a video bitstream associated with compressed three-dimensional video data;
• determining a first flag for each layer or each view, wherein the first flag indicates whether camera parameters for said each layer or each view are present in the video bitstream;
• determining a second flag for each said layer or each view, wherein the second flag is derived from the first flag and indicates camera parameter location for said each layer or each view in the video bitstream, wherein the camera parameter location is derived from a logic combination of the first flag and the second flag;
• deriving the camera parameters for said each layer or each view from the video bitstream from the camera parameter location if the first flag indicates that the camera parameters are present for said each layer or each view;
• decoding current texture data or depth data for said each layer or each view from the video bitstream utilizing the camera parameters for said each layer or each view,
• wherein at least one of the first flag and the second flag is incorporated in a view level, picture level, or slice level of the video bitstream;
• and
• providing decoded current texture data or depth data.

A method of encoding three-dimensional video data for a video encoder, the method comprising:

• receiving current texture data or depth data associated with each layer or each view;
• incorporating a first flag for said each layer or each view of in a view bitstream, wherein a first language indicates whether camera parameters are present for said each layer or each view in the video bitstream;
• incorporating a second flag for said each layer or each view in the video bitstream, wherein the second flag is based on the first flag and indicates camera parameter location for said each layer or each view in the video bitstream, wherein the camera parameter location is derived from a logic combination of the first flag and the second flag;
• incorporating information associated with the camera parameters for said each layer or each view utilizing the camera parameters for said each layer or each view to generate compressed data to incorporate into the video bitstream,
• wherein at least one of the first flag and the second flag is incorporated in a view level, picture level, or slice level of the video bitstream;
• and
• providing the video bitstream.