ENCODING DEVICE ND ENCODING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent the deterioration of picture quality in a part where the reliability of a moving vector is low by judging the reliability of a moving vector detection means and changing a quantization value in accordance with the reliability of the moving vector. SOLUTION: Position information on a macro block at the time of obtaining a moving vector in a moving vector detection circuit 3 is supplied to a terminal macro block detection circuit 21. A quantization value is supplied to a quantization circuit 7 from a quantization control circuit 22. The output of the terminal macro block detection circuit 21 is supplied to the quantization control circuit 22. The terminal macro block detection circuit 21 detects whether the moving vector is detected in the macro block at the terminal of a picture or not. The quantization value for the quantization circuit 7 is switched when the macro block in the terminal of the picture is detected and at time except that time. Thus, the deterioration of picture quality can be prevented in a part where the reliability of the moving vector near the terminal of the picture is low.