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Rate control for low-bit-rate video via variable-encoding frame rates

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2 Author(s)
Hwangjun Song ; Sch. of Electron. & Electr. Eng., Hongik Univ., Seoul, South Korea ; Kuo, C.-C.J.

A novel rate control algorithm with a variable-encoding frame rate method is proposed for low-bit-rate video coding. Most existing rate control algorithms for low-bit-rate video focus on bit allocation at the macroblock level under a constant frame-rate assumption. The proposed rate control algorithm is able to adjust the encoding frame rate at the expense of tolerable time-delay. The new rate control algorithm attempts to achieve a good balance between spatial quality and temporal quality to enhance the overall human perceptual quality at low-bit-rates. It is demonstrated that the rate control algorithm achieves higher coding efficiency at low-bit-rates, with a low additional computational cost. The proposed variable-encoding frame rate method is compatible with the bit-stream structure of H.263+

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Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:11 ,  Issue: 4 )