Multiple bitrate output transcoder based on re-quantizer and re-encoder sharing

摘要

In this paper, we propose an efficient transcoder architecture to support a simultaneous multirate output. First, we discuss about some architectures to realize this feature. Next, we explain the proposed architecture, it shares not only VLD/IQ but also Q/VLC which have the same quantization step sizes each other. We analyze the numbers of Q/VLC times per one MB to investigate an effect of sharing, and evaluate its computation complexity. From the simulation, that complexity has an upper limit and it can support any numbers of bitstream by 3-6 times complexity than single output.