지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
In this paper, an informed watermarking algorithm is proposed that aids in concealing packet loss errors in video communications. This watermark-based error concealment (WEC) method embeds a low resolution version of the video frame inside itself as watermark data. At the receiver, the extracted watermark is used as a reference for error concealment. The proposed DCT-based algorithm employs informed watermarking techniques in order to minimize the distortion of host frames. At the encoder, a predictive feedback loop is employed which helps to adjust the strength of the data embedding. Furthermore, the distortion of the DCT coefficients introduced in the embedding can be removed to a considerable extent, by employing bit-sign adaptivity. Simulation results on standard video sequences show that the proposed informed WEC scheme has an advantage of 3~4 ㏈ in PSNR over non-informed WEC and that even a non-informed WEC is still superior to conventional error concealment techniques.
목차
ABSTRACT
Ⅰ. Introduction
Ⅱ. Previous Works
Ⅲ. Watermark-based Error Concealment
Ⅳ. Informed Watermarking Algorithm
Ⅴ. Experimental Results by Simulations
Ⅵ. Conclusions
References
저자소개
참고문헌 (10)
참고문헌 신청
Adsumilli, C.B., Farias, M.C., Mitra, S.K., Carli, M, “A robust error concealment tech nique using data hiding for image and video transmission over lossy channels,” Vol. 15, No. 11, IEEE Trans. Circuits and Systems for Video Technology, Nov. 2005, pp.139
Adsumilli, C.B.; Mitra, S.K.; Kim, Y.C., “Detector Performance Analysis of Watermark- Based Error Concealment in Image Communications,” Proc. of ICIP, IEEE, Sept. 2005 pp.:916-919.
Bartolini, F. et al. A data hiding approach for correcting errors in H.263 video transmitted over a noisy channel. Proc. IEEE Workshop on Multimedia Signal Processing (2001) pp. 65-70.
Munadi, K., Kurosaki, M., Kiya, H., “ Error concealment using digital watermarking technique for interframe video coding,” Proc. Intl. Tech. Conf. on Circuits and Systems, Computers, and Communications (2002) pp. 599-602.
Yilmazi, A., Alatan, A., “Error concealment of video sequences by data hiding,” Proc. of ICIP, IEEE, 2003, pp.679-682.
Adsumilli, C.B.; Mitra, S.K.; Kim, Y.C., “Detector Performance Analysis of Watermark- Based Error Concealment in Image Communications,” Proc. of ICIP, IEEE, Sept. 2005 pp.:916-919.
Bartolini, F. et al. A data hiding approach for correcting errors in H.263 video transmitted over a noisy channel. Proc. IEEE Workshop on Multimedia Signal Processing (2001) pp. 65-70.
Munadi, K., Kurosaki, M., Kiya, H., “ Error concealment using digital watermarking technique for interframe video coding,” Proc. Intl. Tech. Conf. on Circuits and Systems, Computers, and Communications (2002) pp. 599-602.
Yilmazi, A., Alatan, A., “Error concealment of video sequences by data hiding,” Proc. of ICIP, IEEE, 2003, pp.679-682.
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UCI(KEPA) : I410-ECN-0101-2009-567-017212796