Patent ID: 7809057

Claim:
A method for compressing a video stream, comprising the steps of: (A) encoding at least two pictures of said video stream as a first intra picture and a second intra picture, wherein said first intra picture occurs temporally before said second intra picture; (B) encoding another picture of said video stream as a first inter picture, wherein said first inter picture (a) occurs temporally (i) after said first intra picture and (ii) before said second intra picture and (b) uses (i) said second intra picture and (ii) one other picture occurring temporally before said first inter picture as references; (C) encoding another picture of said video stream as a second inter picture, wherein said second inter picture (a) occurs temporally (i) after said first intra picture and (ii) before said second intra picture and (b) uses (i) said second intra picture and (ii) said first inter picture as references; and (D) encoding another picture in said video stream as a third inter picture, wherein said third inter picture (a) occurs temporally after said first intra picture and (ii) before said second intra picture and (b) uses (i) said second intra picture and (ii) said second inter picture as references.