IMPROVED CASCADED COMPRESSION METHOD AND SYSTEM FOR DIGITAL VIDEO AND IMAGES

摘要

A system and method are disclosed for reducing quantization error in a system using a cascaded compression scheme. An expected quantization error introduced by the cascaded compression scheme is determined. The expected quantization errors based upon two or more second or higher stage test quantizers are then compared. Based on this comparison, a quantizer for the second or higher stage of compression is selected to reduce and/or minimize the quantization error caused by the cascaded compression scheme.