A Basic-Unit Size Based Adaptive Rate Control Algorithm

In order to transmit video efficiently object bandwidth, the rate fluctuation should be controlled to make it as close to the target bandwidth as possible. So, although rate-control is not a part of the standard of H.264/AVC, it has been playing an important role in the standard all the time. For this purpose, on the basis of JVT-G012 algorithm, a new rate-control algorithm based on the spatial temporal gradient scale (STGS) image is presented for H.264/AVC coding to select the size of basic-unit adoptively. The rate fluctuation resulted from the proposed algorithm is always close to the best case of JVT-G012 algorithm. Moreover, for the low computational complexity, the proposed algorithm is easy to implement in real time.