Title :
Estimation of aliasing error in layered coding system
Author :
Iwahashi, Masahiro ; Ohyama, Koichi ; Kambayashi, Noriyoshi
Author_Institution :
Dept. of Electr. Eng., Nagaoka Univ. of Technol., Niigata, Japan
Abstract :
This paper theoretically investigates data distortion caused by resolution conversion in DCT (discrete cosine transform) based layered coding system. The system is attractive because it can not only compress large amounts of video data but also convert the scale of reconstructed pictures. However only a few attempts have so far been made at the degree of aliasing error. In this paper we treat the DCT system as a filter bank so that we can evaluate the system in the frequency domain. As a result of our study the system is theoretically evaluated from the multirate stand point and the DCT system is compared with other layered coding systems, e.g. subband coding and Gaussian/Laplacian pyramid, by means of one objective measure
Keywords :
all-pass filters; data compression; discrete cosine transforms; error statistics; frequency-domain analysis; image reconstruction; low-pass filters; video coding; DCT; Gaussian/Laplacian pyramid; aliasing error estimation; data distortion; filter bank; frequency domain; layered coding system; multirate system; objective measure; reconstructed pictures; resolution conversion; subband coding; video data; Decoding; Discrete cosine transforms; Estimation error; Filter bank; Frequency; Image coding; Image converters; Paints; Signal synthesis; Video compression;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.389416
