【抄録】This paper propeses a new motion compensation (MC) technique which reduces blurring called drift in moving pictures down-scaled with layered coding system. Encoder of the system compresses large amounts of digital video data in the same way of MPEG (Moving Picture Experts Group) algorithm. Decoder, on the other hand, expands a part of the compressed data and reconstructs down scaled pictures. The purpose of this paper is to reduce blurring which is observed in the reconstructed pictures. In this paper, cause of the blurring is analyzed and the method is introduced as a solution to the problem. The new method is implemented by a little modification of motion compensation (MC) of the decoder, namely increasing the number of tap of interpolation filters of the MC. Compressing moving pictures, its effectiveness is also confirmed by means of not only subjective test but also signal to noise ratio.
Conference Paper 1994 IEEE : Institute of Electrical and Electronics Engineers
Design of motion compensation filters of frequency scalable coding - drift reduction
周波数スケーラブル符号化の動き補償フィルタの設計-ドリフト低減
Masahiro Iwahashi, Koichi Ohyama, Wataru Kameyama, Noriyoshi Kambayashi Proceedings - IEEE International Symposium on Circuits and Systems
【抄録】This paper investigates cause of blurring called drift, which is observed in inter-frame predicted and down scaled pictures with scalable video coding system, from multirate stand point of view and proposes a new motion compensation method in decoder for drift reduction.