A new cubic rate distortion model for low-delay video communication

Kam Fai Lo, Kin Man Lam

Research output: Journal article publicationConference articleAcademic researchpeer-review


A new rate model based on a cubic function, and its related control schemes, is proposed to estimate the quantization scales of frames for a specified target bit rate. Our scheme is based on a distortion-rate model, which can easily be extended to a higher order for different coding algorithms without requiring much effort to determine the quantization scales. The formulation of the cubic model is derived from the quadratic rate-distortion model and from simple curve fitting. Our model is implemented in H.264 JM8.1a, and the performance is compared to JM8.1a with different test sequences and bit rates. Experimental results show that our proposed model outperforms the quadratic model in terms of both PSNR and bit rate.
Original languageEnglish
Article number1465653
Pages (from-to)4586-4589
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
Publication statusPublished - 1 Dec 2005
EventIEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan
Duration: 23 May 200526 May 2005

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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