A H.264 bit rate transcoding scheme based on PID controller

An efficient H.264 bit rate transcoding scheme based on PID controller, is proposed in this paper. In the scheme, simplified cascaded pixel domain transcoding structure is adopted to reduce the computational complexity while remaining the comparable reconstructed video quality. Furthermore, a PID controller is introduced in the frame layer to ensure the output bit rate consistent with the target bit rate. The experimental results show that, the scheme proposed in the paper can achieve high bit rate accuracy, which is an efficient bit rate transcoding scheme.