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 reconstructed video quality.Furthermore

a PID controller is introduced in the picture 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.