Switching Frames for Constant Bit Rate Video Streams
Muhammad Waseem Altaf, Ekram Khan, M. Ghanbari · 2009
To map the data rate to the available channel bandwidth, one method is to switch between video streams of different qualities using either intra (I-) frames or the switching predictive (SP-) frames of H.264. Due to its better coding efficiency SP-frames are preferred over I-frames, but these frames