Proceedings., International Conference on Image Processing
... Patrice ONNO and Christine GUILLEMOT CCETT 4, rue du Clos Courtel 35 512 Cesson-Sdvignd - FRA... more ... Patrice ONNO and Christine GUILLEMOT CCETT 4, rue du Clos Courtel 35 512 Cesson-Sdvignd - FRANCE Email: onno@ccett .fr ABSTRACT This paper describes an image coding scheme usinglat-tice vector quantizers where the emphasis is put on a new lattice vector ...
2014 IEEE International Conference on Image Processing (ICIP), 2014
The HEVC (High Efficiency Video Coding) standard brings the necessary quality versus rate perform... more The HEVC (High Efficiency Video Coding) standard brings the necessary quality versus rate performance for efficient transmission of Ultra High Definition formats (UHD). However, one of the remaining barriers to its adoption for UHD content is its high encoding complexity. In this paper, we address the problem of HEVC encoding complexity reduction by proposing a strategy to infer UHD coding modes and quadtree structure from those optimized for the lower (HD) resolution version of the input video. A speed-up factor of 3 is achieved compared to directly encoding the UHD format at the expense of a limited quality loss.
2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013
ABSTRACT The paper describes a K-NN search method aided by local learning of subspace mappings fo... more ABSTRACT The paper describes a K-NN search method aided by local learning of subspace mappings for the problem of neighbor-embedding based image Intra prediction. The local learning of subspace mappings relies on multivariate linear regression. The method is used jointly with Locally Linear Embedding (LLE) as well as with a method inspired from Non Local Means (NLM) for prediction. Linear and kernel ridge regression are also considered directly for predicting the unknown pixels. Rate-distortion performances are then given in comparison with Intra prediction using LLE and classical K-NN search, as well as in comparison with H.264 Intra prediction modes.
Proceedings., International Conference on Image Processing
... Patrice ONNO and Christine GUILLEMOT CCETT 4, rue du Clos Courtel 35 512 Cesson-Sdvignd - FRA... more ... Patrice ONNO and Christine GUILLEMOT CCETT 4, rue du Clos Courtel 35 512 Cesson-Sdvignd - FRANCE Email: onno@ccett .fr ABSTRACT This paper describes an image coding scheme usinglat-tice vector quantizers where the emphasis is put on a new lattice vector ...
2014 IEEE International Conference on Image Processing (ICIP), 2014
The HEVC (High Efficiency Video Coding) standard brings the necessary quality versus rate perform... more The HEVC (High Efficiency Video Coding) standard brings the necessary quality versus rate performance for efficient transmission of Ultra High Definition formats (UHD). However, one of the remaining barriers to its adoption for UHD content is its high encoding complexity. In this paper, we address the problem of HEVC encoding complexity reduction by proposing a strategy to infer UHD coding modes and quadtree structure from those optimized for the lower (HD) resolution version of the input video. A speed-up factor of 3 is achieved compared to directly encoding the UHD format at the expense of a limited quality loss.
2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013
ABSTRACT The paper describes a K-NN search method aided by local learning of subspace mappings fo... more ABSTRACT The paper describes a K-NN search method aided by local learning of subspace mappings for the problem of neighbor-embedding based image Intra prediction. The local learning of subspace mappings relies on multivariate linear regression. The method is used jointly with Locally Linear Embedding (LLE) as well as with a method inspired from Non Local Means (NLM) for prediction. Linear and kernel ridge regression are also considered directly for predicting the unknown pixels. Rate-distortion performances are then given in comparison with Intra prediction using LLE and classical K-NN search, as well as in comparison with H.264 Intra prediction modes.
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Papers by C. Guillemot