A method, an apparatus and a computer program product for high quality regions change in omnidirectional conversational video

An apparatus comprising at least one processor and at least one memory including computer program code for one or more programs, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

• receive an omnidirectional video content for encoding;
• obtain information of a viewport of a receiver device;
• obtain information of a margin region outside the viewport;
• obtain a margin update threshold parameter defining a threshold region within the margin region;
• based on the information of the viewport and the margin update threshold parameter determine whether to change the margin region;
• encode the omnidirectional video content within the viewport with a first quality;
• encode the omnidirectional video content within the margin region with a second quality, wherein the second quality is not higher than the first quality;
• and
• encode the omnidirectional video content outside the viewport and the margin region with a third quality lower than the first quality and the second quality.

A method, comprising:

• receiving by a sender device an omnidirectional video content for encoding;
• obtaining information of a viewport of a receiver device;
• obtaining information of a margin region outside the viewport;
• obtaining a margin update threshold parameter defining a threshold region within the margin region;
• based on the information of the viewport and the margin update threshold parameter determining whether to change the margin region;
• encoding the omnidirectional video content within the viewport with a first quality;
• encoding the omnidirectional video content within the margin region with a quality not higher than the first quality;
• and
• encoding the omnidirectional video content outside the viewport and the margin region with a third quality lower than the first quality and the quality of the margin region.

An apparatus comprising at least one processor and at least one memory including computer program code for one or more programs, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

• receive encoded omnidirectional video content for displaying, wherein the encoded omnidirectional video content comprises a viewport region encoded with a first quality, a margin region outside the viewport region encoded with a second quality not higher than the first quality and a background region outside the margin region encoded with a third quality that is lower than the first quality and lower than the quality of the margin region;
• obtain information of a current viewport of the receiver device;
• obtain information of a margin region outside the current viewport;
• obtain a margin update threshold parameter defining a threshold region within the margin region;
• determine whether the current viewport breaches the threshold region;
• and
• based on the determining send information of the current viewport to a sender device.

A method, comprising:

• receiving by a receiver device encoded omnidirectional video content for displaying, wherein the encoded omnidirectional video content comprises a viewport region encoded with a first quality, a margin region outside the viewport region encoded with a second quality not higher than the first quality and a background region outside the margin region encoded with a third quality that is lower than the first quality and lower than the quality of the margin region;
• obtaining information of a current viewport of the receiver device;
• obtaining information of a margin region outside the current viewport;
• obtaining a margin update threshold parameter defining a threshold region within the margin region;
• determining whether the current viewport breaches the threshold region;
• and
• based on the determining sending information of the current viewport to a sender device.