METHOD AND APPARATUS FOR CONTROL OF RATE-DISTORTION TRADEOFF BY USING LAGRANGE MULTIPLIER AND VISUAL MASK

摘要

A kind of control of method and apparatus Rate-Distortion tradeoff model selection in video encoder by being disclosed. System of the invention is first in expected distortion value distortion value D selected around. Next, the system determines quantizer values Q using selected distortion value D. System then uses lagrangian multiplier quantizer values Q. Using selected lagrangian multiplier value and quantizer Q, system starts encoded pixels module. If the system detects that potential buffer overflow, then the system will increase glug Lang multipliers λ. If glug Lang multipliers λ is more than maximum lambda threshold values, system is by quantizer values Q. If the system detects that potential buffer area underflow, then system will reduce glug Lang multipliers λ. If glug Lang multipliers λ is lower than the smallest lambda threshold values, system is by quantizer values Q.