Method and apparatus for slice common information sharing

A method of sharing filter information in a video encoding system, the method comprising:

• receiving reconstructed data for a picture, wherein the picture comprises one or more slices;
• incorporating a first information-sharing flag in picture level data or sequence level data to indicate whether to share filter information corresponding to a sample adaptive offset (SAO) filter or an adaptive loop filter (ALF) for one or more slices of the picture;
• if the first information-sharing flag indicates sharing:
• incorporating common information of an in-loop filter for one or more slice in the picture level data, the sequence level data, or a combination thereof, wherein said common information comprises at least partial filter parameters of the in-loop filter and said at least partial filter parameters of the in-loop filter includes at least one filter coefficient or at least one offset value, wherein at least a portion of the filter information for one or more slices is in the common information;
• and
• applying the ALF using at least one filter coefficient in the common information or applying the SAO using at least one offset value in the common information to one or more slices of the picture.

An apparatus of sharing information in a video decoding system, the apparatus comprising one or more electronic circuits configured to:

• receive a first information-sharing flag in picture level data, sequence level data or slice level data;
• if the first information-sharing flag indicates sharing:
• determine common information of an in-loop filter corresponding to a sample adaptive offset (SAO) filter or an adaptive loop filter (ALF) in the picture level data or the sequence level data, wherein said common information comprises at least partial filter parameters of the in-loop filter and said at least partial filter parameters of the in-loop filter includes at least one filter coefficient of the ALF or at least one offset value of the SAO;
• determine filter information of the in-loop filter for one or more slices of a picture, wherein at least a portion of the filter information is determined from said common information;
• and
• apply the ALF using at least one filter coefficient in the common information or applying the SAO using at least one offset value in the common information to one or more slices.

An apparatus of sharing information in a video encoding system, the apparatus comprising one or more electronic circuits configured to:

• receive reconstructed data for a picture, wherein the picture comprises one or more slices;
• incorporate a first information-sharing flag in picture level data or sequence level data to indicate whether to share filter information for one or more slices of the picture;
• if the first information-sharing flag indicates sharing:
• incorporate common information of an in-loop filter corresponding to a sample adaptive offset (SAO) filter or an adaptive loop filter (ALF) for one or more slices in the picture level data or the sequence level data, wherein said common information comprises at least partial filter parameter of the in-loop filter, wherein at least a portion of the filter information for one or more slices is in the common information and said at least partial filter parameters of the in-loop filter includes at least one filter coefficient of the ALF or at least one offset value of the SAO;
• and
• apply the ALF using at least one filter coefficient in the common information or applying the SAO using at least one offset value in the common information to one or more slices.

A method of sharing in-loop filter information in a video decoding system, the method comprising:

• receiving from a video bitstream an indication of information-sharing associated with at least one in-loop filter corresponding to a sample adaptive offset (SAO) filter or an adaptive loop filter (ALF) for an image region;
• if the indication of information-sharing is asserted:
• receiving an adaptation parameter set (APS) for the image region, wherein the APS includes filter information related to said at least one in-loop filter and the filter information comprises at least partial filter parameters of said at least one in-loop filter and said at least partial filter parameters of said at least one in-loop filter includes non-flag information, wherein the APS is in a section of the video bitstream separate from picture parameter set (PPS);
• determining the filter parameters of said at least one in-loop filter comprising said at least a portion of the filter parameters from the APS;
• and
• applying the ALF using at least one filter coefficient in the APS or applying the SAO using at least one offset value in the APS to video data in the image region.

A method of sharing in-loop filter information in a video encoding system, the method comprising:

• incorporating an indication of information-sharing in a video bitstream, wherein the indication of information-sharing is associated with at least one in-loop filter corresponding to a sample adaptive offset (SAO) filter or an adaptive loop filter (ALF);
• if the indication of information-sharing is asserted:
• incorporating an adaptation parameter set (APS) in a section of the video bitstream separate from picture parameter set (PPS), wherein the APS includes filter information related to said at least one in-loop filter and the filter information comprises at least partial filter parameters of said at least one in-loop filter and said at least partial filter parameters of said at least one in-loop filter includes non-flag information;
• and
• applying the ALF using at least one filter coefficient in the APS or applying the SAO using at least one offset value in the APS to video data in an image region.

An apparatus for sharing in-loop filter information in a video decoding system, the apparatus comprising one or more electronic circuits configured to:

• receive from a video bitstream an indication of information-sharing associated with at least one in-loop filter corresponding to a sample adaptive offset (SAO) filter or an adaptive loop filter (ALF) for an image region;
• when the indication of information-sharing is asserted, receive an adaptation parameter set (APS) for the image region, wherein the APS includes filter information related to said at least one in-loop filter and the filter information comprises at least a portion of filter parameters of said at least one in-loop filter and said at least partial filter parameters of the in-loop filter includes at least one filter coefficient of the ALF or at least one offset value of the SAO, wherein the APS is in a section of the video bitstream separate from picture parameter set (PPS);
• determine the filter parameters of said at least one in-loop filter comprising said at least a portion of filter parameters from the APS;
• and
• apply the ALF using at least one filter coefficient in the APS or applying the SAO using at least one offset value in the APS to video data in the image region.

An apparatus of sharing in-loop filter information in a video encoding system, the apparatus comprising one or more electronic circuits configured to:

• incorporate an indication of information-sharing in a video bitstream, wherein the indication of information-sharing is associated with at least one in-loop filter corresponding to a sample adaptive offset (SAO) filter or an adaptive loop filter (ALF);
• when the indication of information-sharing is asserted, incorporate adaptation parameter set (APS) in a section of the video bitstream separate from picture parameter set (PPS), wherein the APS includes filter information related to said at least one in-loop filter and the filter information comprises at least a portion of filter parameters of said at least one in-loop filter and said at least partial filter parameters of the in-loop filter includes at least one filter coefficient of the ALF or at least one offset value of the SAO;
• and
• apply the ALF using at least one filter coefficient in the APS or applying the SAO using at least one offset value in the APS to blocks in a slice of a picture.