360 video transmission method, 360 video reception method, 360 video transmission apparatus, and 360 video reception apparatus
A video transmission method according to embodiments comprises: a pre-processing step for processing video data; a step for encoding the video data; and/or a step for transmitting a bitstream including the video data. A video reception method according to embodiments comprises the steps of: receiving video data; decoding the video data; and/or rendering the video data.
1. A method for transmitting video data by an apparatus, comprising:
pre-processing video data for multiple 360 pictures including one or more source views, wherein the pre-processing includes:
partitioning the one or more source views based on a block;
packing one or more source views included in the video data into a packed picture,
wherein in response to a number of informative pixels in the block having a value that is greater than a threhsold, the block is packed into a packed picture and in response to a number of informative pixels in the block having a value that is not greater than the threshold, the block is discarded;
encoding the video data; and
transmitting a bitstream including the video data.
2. The method of claim 1 , wherein the packing comprises:
generating metadata about a region included in the packing picture.
3. A video data transmission apparatus comprising:
a pre-processor configured to process video data for multiple 360 pictures including one or more source views, wherein the pre-processor performs;
partition the one or more source views based on a block
pack one or more source views included in the video data into a packed picture,
wherein in response to a number of informative pixels in the block having a value that is greater than a threshold, the block is packed into a packed picture and in response to a number of informative pixels in the block having a value that is not greater than the threshold, the block is discarded;
an encoder configured to encode the video data; and
a transmitter configured to transmit a bitstream including the video data.
4. The video transmission apparatus of claim 3 , wherein the pre-processor is configured to generates metadata about a region included in the packing picture.
5. A method for receiving video data by an apparatus, comprising:
receiving video data for multiple 360 pictures including one or more source views;
unpacking a packed picture in the video data, wherein the packed picture includes the one or more source views that are partitioned based on a block,
wherein in response to a number of informative pixels in the block having a value that is greater than a threshold, the block is packed into the packed picture and in response to a number of informative pixels in the block having a value that is not greater than the threshold, the block is discarded;
decoding the video data; and
rendering the video data.
6. The method of claim 5 , wherein the unpacking comprises:
receiving metadata about a region included in the packing picture.
7. A video data reception apparatus comprising:
a receiver configured to receive video data for multiple 360 pictures including one or more source views;
a unpacker configured to unpack a packed picture in the video data, wherein the packed picture includes the one or more source views that are partitioned based on a block,
wherein in response to a number of informative pixels in the block having a value that is greater than a threshold, the block is packed into the packed picture and in response to a number of informative pixels in the block having a value that is not greater than the threshold, the block is discarded;
a decoder configured to decode the video data; and
a renderer configured to render the video data.
8. The video reception apparatus of claim 7 , wherein the unpacker is configured to receive metadata about a region included in the packing picture.