Skalowalność przestrzenno-czasowa falkowych koderów sekwencji wizyjnych

• Autorzy: Popławski A. , Zając W.
• Języki publikacji: PL

Abstrakty

EN

The significance of the wavelet analysis with motion compensation, due to numerous applications in the area of scalable video coders, has grown significantly in importance in the recent years. Wavelet-based coders are attractive alternative to popular hybrid coders (MPEG 2, H.264), due to natural feature of full scalability (temporal, spatial and SNR scalability), allowing to control the picture size and transmission bitrate [3, 8, 9, 10]. The scalability of the coders is a fundamental feature while deploying within the heterogeneous networks. In the paper results of experimental research of ompression efficiency with usage of patiotemporal scalability was presented. Tab. 1 presents experiment results as PSNR values for bitrates from 128 to 704 kbps for spatial and temporal scalability. Presented results show that wavelet video coders are suitable for scalable video coding. Despite the fact that coding efficiency decrease when scalability is used, obtained picture is correct and legible.

Słowa kluczowe

PL

skalowalność; sekwencja wideo; kodek falkowy; kompresja wideo

EN

scalability; video sequences; wavelet codec; video compression

• Wydawca: Komisja Informatyki Polskiej Akademii Nauk, Oddział w Gdańsku
• Czasopismo: Metody Informatyki Stosowanej
• Rocznik: 2011
• Tom: nr 2
• Strony: 113--119
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Popławski A.

autor

Zając W.

• Uniwersytet Zielonogórski, Wydział Elektrotechniki, Informatyki i Telekomunikacji

Bibliografia

• [1] Choi S. J., Woods J. W. Motion-compensated 3-D subband coding of video. IEEE Transactions on Image Processing, vol. 8, 1999, s. 155-167
• [2] Domański M., Błaszak Ł., Maćkowiak S. AVC Video Coders with Spatial and Temporal Scalability. Picture Coding Symp., 2003, s. 41-46
• [3] Hsiang S.-T., Woods J. W. Embedded image coding using zeroblocks of subband/wavelet coefficients and contest modeling. IEEE International Symposium on Circuits and Systems, vol. 3, 2000, s. 662-665
• [4] ISO/IEC/SC29/WG11/MPEG/N7081, ISO/IEC 14496-10 AVC / ITU-T Rec. H.264, Text for ISO/IEC 14496-10:2005 (AVC 3rd Edition): Information Technology – Coding of audio-visual objects – Part 10: Advanced Video Coding, MPEG 2005
• [5] Ohm J.-R. Three-dimensional subband coding with motion compensation. IEEE Transactions Image Processing, vol. 3, 1994, s. 559-571
• [6] Rusert T., Hanke K., Wien M. Optimization for locally adaptive MCTF based on 5/3 lifting. in Proc. Picture Coding Symposium, 2004
• [7] Schwarz H., Marpe D., Wiegand T. Scalable Extension of H.264/AVC. ISO/IEC JTC1/SC29/WG11, Doc. M10569/S03, MPEG 2004.
• [8] Strang G., Nguyen T. Wavelets and Filter Banks. Wellesley-Cambridge Press, 1996
• [9] Vetterli M. and Kovačević J. Wavelets and Subband Coding. Englewood Cliffs, NJ: Prentice-Hall, 1995
• [10] Woods J. W. Subband Image Coding. Kluwer Academic Publishers, 1991