Progressive I-slice reference for packet loss resilient video coding

A method for decoding a compressed video stream, comprising:

• decoding, by a processor from the compressed video stream, a group of pictures,
• wherein each picture of the group of pictures consisting of a same number of slices,
• wherein the slices being arranged in a same pattern such that boundaries of the slices across the pictures of the group of pictures having same relative locations in the pictures,
• wherein no picture of the group of pictures being such that all slices of the picture are decoded using intra-prediction, and
• wherein decoding the group of pictures comprising:
• decoding a first picture of the group of pictures and a second picture of the group of pictures, wherein the first picture comprises a first I-slice decoded using intra-prediction, the second picture comprises a second I-slice decoded using intra-prediction, and the first I-slice and the second I-slice are not co-located with each other;
• decoding a first P-slice of a current picture of the group of pictures referencing the first I-slice, wherein the first P-slice of the current picture is co-located with the first I-slice;
• and
• decoding a second P-slice of the current picture referencing the second I-slice, wherein the second P-slice of the current picture is co-located with the second I-slice.