Methods and apparatuses for encoding and decoding video using inter-color-plane prediction
Methods and apparatuses for performing inter-color-plane prediction with adaptability to various existing video content representations are provided. A plurality of predetermined rescaling schemes based on a color plane format is selected. A first block of original samples of a first color plane is encoded into a compressed bitstream. A block of reconstructed samples of the first color plane is reconstructed. An inter-color-plane prediction process is performed to produce samples of a second color plane. Said block of prediction samples of the second color plane is subtracted from a second block of original samples of the second color plane to produce a block of residual samples of the second color plane where the positions of the first block and the second block of original samples are aligned. Finally, the block of residual samples of the second color plane is encoded.
1. A method of encoding video utilizing inter-color-plane prediction comprising:
writing a parameter into a header of a compressed video bitstream indicating color plane format;
selecting one out of a plurality of predetermined rescaling schemes based on said color plane format;
encoding a first block of original samples of a first color plane into said compressed video bitstream;
reconstructing a block of reconstructed samples of said first color plane corresponding to said first block of original samples;
performing an inter-color-plane prediction process using said selected rescaling scheme and said block of reconstructed samples of said first color plane to produce a block of prediction samples of a second color plane;
subtracting said block of prediction samples of said second color plane from a second block of original samples of said second color plane to produce a block of residual samples of said second color plane, whereas the positions of said first block and said second block of original samples are aligned;
encoding said block of residual samples of said second color plane into said compressed video bitstream.
2. A method of decoding video utilizing inter-color-plane prediction comprising:
parsing a parameter from a header of a compressed video bitstream indicating color plane format;
selecting one out of a plurality of predetermined rescaling schemes based on said color plane format;
decoding a first block of residual samples of a first color plane from said compressed video bitstream;
reconstructing a first block of reconstructed samples of said first color plane using said first block of residual samples of said first color plane;
performing an inter-color-plane prediction process using said selected rescaling scheme and said block of reconstructed samples of said first color plane to produce a block of prediction samples of a second color plane;
decoding a second block of residual samples of said second color plane from said compressed video bitstream, whereas the positions of said first block and said second block of residual samples are aligned;
reconstructing a second block of reconstructed samples of said second color plane comprising summing said second block of residual samples of said second color plane and said block of prediction samples of said second color plane.
3. An apparatus for encoding video utilizing inter-color-plane prediction comprising:
a writing unit operable to write a parameter into a header of a compressed video bitstream indicating color plane format;
a selecting unit operable to select one out of a plurality of predetermined rescaling schemes based on said color plane format;
an encoding unit operable to encode a first block of original samples of a first color plane into said compressed video bitstream;
a reconstruction unit operable to reconstruct a block of reconstructed samples of said first color plane corresponding to said first block of original samples;
a prediction unit operable to perform an inter-color-plane prediction process using said selected rescaling scheme and said block of reconstructed samples of said first color plane to produce a block of prediction samples of a second color plane;
a subtracting unit operable to subtract said block of prediction samples of said second color plane from a second block of original samples of said second color plane to produce a block of residual samples of said second color plane, whereas the positions of said first block and said second block of original samples are aligned;
an encoding unit operable to encode said block of residual samples of said second color plane into said compressed video bitstream.
4. An apparatus for decoding video utilizing inter-color-plane prediction comprising:
a parsing unit operable to parse a parameter from a header of a compressed video bitstream indicating color plane format;
a selecting unit operable to select one out of a plurality of predetermined rescaling schemes based on said color plane format;
a decoding unit operable to decode a first block of residual samples of a first color plane from said compressed video bitstream;
a reconstruction unit operable to reconstruct a first block of reconstructed samples of said first color plane using said first block of residual samples of said first color plane;
a prediction unit operable to perform an inter-color-plane prediction process using said selected rescaling scheme and said block of reconstructed samples of said first color plane to produce a block of prediction samples of a second color plane;
a decoding unit operable to decode a second block of residual samples of said second color plane from said compressed video bitstream, whereas the positions of said first block and said second block of residual samples are aligned;
a reconstruction unit operable to reconstruct a second block of reconstructed samples of said second color plane comprising summing said second block of residual samples of said second color plane and said block of prediction samples of said second color plane.