Exploiting the directional features in MPEG-2 for H.264 intra transcoding

Authors:
H. Kalva;B. Petljanski
Affiliations:
Dept. of Comput. Sci. & Eng., Florida Atlantic Univ., Boca Raton, FL, USA;-
Venue:
IEEE Transactions on Consumer Electronics
Year:
2006

Citing 0
Cited 3

Video encoding and transcoding using machine learning

Proceedings of the 9th International Workshop on Multimedia Data Mining: held in conjunction with the ACM SIGKDD 2008
MPEG-2 to H.264/AVC Intra Frame Transcoding

PCM '09 Proceedings of the 10th Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
General Architecture for MPEG-2/H.263/H.264/AVC to H.264/AVC Intra Frame Transcoding

Journal of Signal Processing Systems

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Abstract

This paper presents an MPEG-2 to H.264 intra frame video transcoder. The DCT coefficients gathered from the MPEG-2 process are used to estimate the directional features in a picture. The estimated directional features are then used to compute the intra prediction modes in the H.264 encoding stage. The INTRA 16×16 vs. INTRA4×4 MB coding mode decision is made based on the variance of the DC coefficients of the 8×8 DCT blocks in the input MPEG-2 video. The proposed approach completely avoids the MB mode and prediction mode computations in the H.264 encoding stage, there by reducing the transcoder complexity substantially. The results show that our approach results in over 30% drop in the intra frame encoding time with a negligible drop in PSNR. A comparison with a cascaded reference transcoder is presented.