Systems and methods for signaling scaling window information in video coding
A device configured to signal picture partitioning information is provided. The picture partitioning information includes a syntax element specifying whether picture partitioning is applied to a picture. Additional syntax elements may be signaled based on whether the picture partitioning is applied to the picture.
1. A video decoder for decoding video data, the video decoder comprising:
a decoding circuit that decodes:
a first syntax element in a picture parameter set, wherein the first syntax element equal to one specifies that no picture partitioning is applied to each picture referring to the picture parameter set, and the first syntax element equal to zero specifies that each picture referring to the picture parameter set may be partitioned into more than one tile or slice,
a second syntax element in the picture parameter set, wherein the second syntax element specifies whether deblocking filter information is present in a picture header syntax structure in a case that (a) a value of the first syntax element is equal to zero and (b) a value of an enabled flag is equal to one,
a third syntax element in the picture parameter set, wherein the third syntax element specifies whether reference picture list information is present in the picture header syntax structure in a case that the value of the first syntax element is equal to zero, and
a fourth syntax element in the picture parameter set, wherein the fourth syntax element specifies whether weighted prediction information may be present in the picture header syntax structure only in a case that (a) the value of the first syntax element is equal to zero, (b) a value of a fifth syntax element or a value of a sixth syntax element is equal to one, and (c) a value of the third syntax element is equal to one,
wherein
the enabled flag is included in the picture parameter set and the enabled flag specifies a presence of a deblocking parameter flag in the picture header syntax structure,
the fifth syntax element is included in the picture parameter set and the fifth syntax element specifies whether a weight prediction is applied to P slices referring to the picture parameter set, and
the sixth syntax element is included in the picture parameter set and the sixth syntax element specifies whether an explicit weighted prediction is applied to B slices referring to the picture parameter set.
2. A video encoder for encoding video data, the video encoder comprising:
an encoding circuit that encodes:
a first syntax element in a picture parameter set, wherein the first syntax element equal to one specifies that no picture partitioning is applied to each picture referring to the picture parameter set, and the first syntax element equal to zero specifies that each picture referring to the picture parameter set may be partitioned into more than one tile or slice,
a second syntax element in the picture parameter set, wherein the second syntax element specifies whether deblocking filter information is present in a picture header syntax structure in a case that (a) a value of the first syntax element is equal to zero and (b) a value of an enabled flag is equal to one,
a third syntax element in the picture parameter set, wherein the third syntax element specifies whether reference picture list information is present in the picture header syntax structure in a case that the value of the first syntax element is equal to zero, and
a fourth syntax element in the picture parameter set, wherein the fourth syntax element specifies whether weighted prediction information may be present in the picture header syntax structure only in a case that (a) the value of the first syntax element is equal to zero, (b) a value of a fifth syntax element or a value of a sixth syntax element is equal to one, and (c) a value of the third syntax element is equal to one,
wherein
the enabled flag is included in the picture parameter set and the enabled flag specifies a presence of a deblocking parameter flag in the picture header syntax structure,
the fifth syntax element is included in the picture parameter set and the fifth syntax element specifies whether a weight prediction is applied to P slices referring to the picture parameter set, and
the sixth syntax element is included in the picture parameter set and the sixth syntax element specifies whether an explicit weighted prediction is applied to B slices referring to the picture parameter set.
3. A method for decoding video data, the method including:
decoding a first syntax element in a picture parameter set, wherein the first syntax element equal to one specifies that no picture partitioning is applied to each picture referring to the picture parameter set, and the first syntax element equal to zero specifies that each picture referring to the picture parameter set may be partitioned into more than one tile or slice;
decoding a second syntax element in the picture parameter set, wherein the second syntax element specifies whether deblocking filter information is present in a picture header syntax structure in a case that (a) a value of the first syntax element is equal to zero and (b) a value of an enabled flag is equal to one;
decoding a third syntax element in the picture parameter set, wherein the third syntax element specifies whether reference picture list information is present in the picture header syntax structure in a case that the value of the first syntax element is equal to zero; and
decoding a fourth syntax element in the picture parameter set, wherein the fourth syntax element specifies whether weighted prediction information may be present in the picture header syntax structure only in a case that (a) the value of the first syntax element is equal to zero, (b) a value of a fifth syntax element or a value of a sixth syntax element is equal to one, and (c) a value of the third syntax element is equal to one,
wherein
the enabled flag is included in the picture parameter set and the enabled flag specifies a presence of a deblocking parameter flag in the picture header syntax structure,
the fifth syntax element is included in the picture parameter set and the fifth syntax element specifies whether a weight prediction is applied to P slices referring to the picture parameter set, and
the sixth syntax element is included in the picture parameter set and the sixth syntax element specifies whether an explicit weighted prediction is applied to B slices referring to the picture parameter set.