Methods and systems for generating color remapping information supplemental enhancement information messages for video

An apparatus comprising:

• a memory configured to store video data;
• and
• a processor configured to:
• obtain a video bitstream, the video bitstream including a plurality of pictures having a first color characteristic;
• identify, from the video bitstream, a color remapping information (CRI) supplemental enhancement information (SEI) message, wherein one or more values of at least one syntax element of the CRI SEI message are restricted based on a condition;
• and
• remap one or more samples of the plurality of pictures from the first color characteristic to a second color characteristic using a color remapping model of the CRI SEI message.

A computer readable medium having stored thereon instructions that when executed by a processor perform a method, including:

• obtaining a video bitstream, the video bitstream including a plurality of pictures having a first color characteristic;
• identifying, from the video bitstream, a color remapping information (CRI) supplemental enhancement information (SEI) message, wherein one or more values of at least one syntax element of the CRI SEI message are restricted based on a condition;
• and
• remapping one or more samples of the plurality of pictures from the first color characteristic to a second color characteristic using a color remapping model of the CRI SEI message.

An apparatus comprising:

• means for obtaining a video bitstream, the video bitstream including a plurality of pictures having a first color characteristic;
• means for identifying, from the video bitstream, a color remapping information (CRI) supplemental enhancement information (SEI) message, wherein one or more values of at least one syntax element of the CRI SEI message are restricted based on a condition;
• and
• means for remapping one or more samples of the plurality of pictures from the first color characteristic to a second color characteristic using a color remapping model of the CRI SEI message.

A method of encoding video data, the method comprising:

• obtaining video data at an encoder;
• encoding, into a video bitstream, a plurality of pictures based on the video data, the plurality of pictures having a first color characteristic;
• and
• encoding, into the video bitstream, a color remapping information (CRI) supplemental enhancement information (SEI) message, the CRI SEI message including a color remapping model for remapping one or more samples of the plurality of pictures from the first color characteristic to a second color characteristic, wherein one or more values of at least one syntax element of the CRI SEI message are restricted based on a condition.

An apparatus comprising:

• a memory configured to store video data;
• and
• a processor configured to:
• obtain video data at an encoder;
• encode, into a video bitstream, a plurality of pictures based on the video data, the plurality of pictures having a first color characteristic;
• and
• encode, into the video bitstream, a color remapping information (CRI) supplemental enhancement information (SEI) message, the CRI SEI message including a color remapping model for remapping one or more samples of the plurality of pictures from the first color characteristic to a second color characteristic, wherein one or more values of at least one syntax element of the CRI SEI message are restricted based on a condition.

A computer readable medium having stored thereon instructions that when executed by a processor perform a method, including:

• obtaining video data at an encoder;
• encoding, into a video bitstream, a plurality of pictures based on the video data, the plurality of pictures having a first color characteristic;
• and
• encoding, into the video bitstream, a color remapping information (CRI) supplemental enhancement information (SEI) message, the CRI SEI message including a color remapping model for remapping one or more samples of the plurality of pictures from the first color characteristic to a second color characteristic, wherein one or more values of at least one syntax element of the CRI SEI message are restricted based on a condition.

An apparatus comprising:

• means for obtaining video data at an encoder;
• means for encoding, into a video bitstream, a plurality of pictures based on the video data, the plurality of pictures having a first color characteristic;
• and
• means for encoding, into the video bitstream, a color remapping information (CRI) supplemental enhancement information (SEI) message, the CRI SEI message including a color remapping model for remapping one or more samples of the plurality of pictures from the first color characteristic to a second color characteristic, wherein one or more values of at least one syntax element of the CRI SEI message are restricted based on a condition.