I to P Frames Ratio Clause Samples

I to P Frames Ratio. First, we study the effect of the ratio between I and P frames on the performance of the encoder. Since the first frame of each GOP is specified as an I frame and the rest as P frames, the ratio can be adjusted by increasing or decreasing the GOP size. Macroblocks belonging to I frames are only intra-predicted, while macroblocks from P frames are both inter- and intra-predicted. Thus, I frames are encoded faster than P frames, which means that higher fps can be achieved. However, the compression rate of P frames is higher, since both prediction techniques are used on their macroblocks. The more accurate one of the two predictions is selected, which in turn produces a residual with less energy, needing less bits to be encoded.