DYNAMIC IMAGE ENCODER AND METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a code amount controller that relates to high efficiency coding of a dynamic image and is especially suitable for variable bit rate coding in real time. SOLUTION: The dynamic image coder is provided with a means 23 that detects a generated code amount of each image, a means 22 that detects a mean quantization scale of each image, a means 25 that detects a coding image characteristic of a received image, a means 24 that calculates a complexity of a screen of the past image and the present picture on the basis of the generated code amount and the mean quantization scale, a means 27 that decides an object code amount Rp for a prescribed period, and a means 14 that decides an assigned code amount of the image about to be coded next on the basis of the generated code amount, the complexity of the screen and the object code amount Rp and decides the quantization scale of the image going to be coded next on the basis of the assigned code amount.