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The objective of joint rate allocation among multiple coded video streams isto share the bandwidth to meet the demands of minimum average distortion(minAVE) or minimum distortion variance (minVAR). In previous works on minVARproblems, bits are directly assigned in proportion to their complexity measuresand we call it look-ahead allocation model (LAM), which leads to the fact thatthe performance will totally depend on the accuracy of the complexity measures.This paper proposes a look-ahead and feedback allocation model (LFAM) for jointrate allocation for High Efficiency Video Coding (HEVC) platform which requiresnegligible computational cost. We derive the model from the target function ofminVAR theoretically. The bits are assigned according to the complexitymeasures, the distortion and bitrate values fed back by the encoder together.We integrated the proposed allocation model in HEVC reference software HM16.0and several complexity measures were applied to our allocation model. Resultsdemonstrate that our proposed LFAM performs better than LAM, and an average of65.94% variance of mean square error (MSE) is saved with different complexitymeasures.

Joint Rate Allocation with Both Look-ahead And Feedback Model For High Efficiency Video Coding