Motion video adaptive quantization in the transform domain
Cesar A. Gonzales, Eric Viscito · IEEE Transactions on Circuits and Systems for Video Technology · 1991
The authors developed a minimax adaptive quantization algorithm that operates in the discrete cosine transform domain conforming to the Moving Picture Experts Group (MPEG) standard. The algorithm is designed to optimize image quality by adapting a quantizer scaling factor to the local characteristics of the video pictures while preserving a constraint on the average output bit rate. The algorithm is well suited for real-time encoder implementations of current video compression standards, such as MPEG and H.261.>