Acoustic signal transform coding method and decoding method having a high efficiency envelope flattening method therein

1998 ◽  
Vol 103 (6) ◽  
pp. 3135
Author(s):  
Naoki Iwakami
Keyword(s):  
Acoustic Signal ◽  
High Efficiency ◽  
Transform Coding ◽  
Coding Method

A High Efficiency Coding Method

1997 ◽  
pp. 127-132
Author(s):  
Kazuto Kamikura ◽  
Hirohisa Jozawa ◽  
Hiroshi Watanabe ◽  
Hiroshi Kotera ◽  
Kazunori Shimamura
Keyword(s):  
High Efficiency ◽  
Coding Method

High-Efficiency Image-Coding Method Using Vector Quantization and Block Coding

1989 ◽  
Vol 20 (9) ◽  
pp. 100-108
Author(s):  
Tomoyuki Nonomura ◽  
Kazumi Yamashita ◽  
Kiyotsugu Satoh
Keyword(s):  
Vector Quantization ◽  
Image Coding ◽  
High Efficiency ◽  
Block Coding ◽  
Coding Method

scholarly journals High Capacity HEVC Video Hiding Algorithm Based on EMD Coded PU Partition Modes

Symmetry ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1015 ◽  
Author(s):  
Zhonghao Li ◽  
Laijin Meng ◽  
Xinghao Jiang ◽  
Zhaohong Li
Keyword(s):  
Data Hiding ◽  
High Efficiency ◽  
High Capacity ◽  
Visual Quality ◽  
Video Data ◽  
Spatial Coding ◽  
High Efficiency Video Coding ◽  
New Information ◽  
Coding Method ◽  
High Embedding Capacity

Data hiding in videos has been a big concern as their rich redundancy can be used for embedding a lot of secret information. Further, as high efficiency video coding (HEVC) introduces many innovative technologies compared with the previous standard, H.264, it has gradually become the mainstream. Therefore, it is valuable to develop new information hiding algorithms by using novel features of HEVC. A HEVC video data hiding algorithm based on prediction unit (PU) partition modes from inter prediction process is proposed in this paper. Firstly, code units (CUs) in two sizes of 8 × 8 and 16 × 16 are selected for embedding, then the PU partition modes in these CUs are coded by a spatial coding method. After that, two specific hiding algorithms by modifying coded PU partition modes in CUs of 8 × 8 and 16 × 16 are proposed, respectively. Experimental results show that the proposed algorithm has achieved excellent performance with high visual quality, and high embedding capacity and low bitrate increase in both high- and low-resolution videos compressed with different quantization parameters (QPs). Compared with the state-of-the-art work, the proposed algorithm achieves a much higher capacity while keeping quite high visual quality with little increase of bitrate.

scholarly journals Reversible Hadamard transforms

2007 ◽  
Vol 20 (3) ◽  
pp. 309-330 ◽  
Author(s):  
Hakob Sarukhanyan ◽  
Sos Agaian ◽  
Karen Egiazarian ◽  
Jaakko Astola
Keyword(s):  
Digital Image ◽  
Input Signal ◽  
Higher Order ◽  
Transform Coding ◽  
Hadamard Transform ◽  
Fast Transform ◽  
Coding Method ◽  
Block Transform ◽  
Hadamard Transforms

A coding method which reconstruct an original digital image without distortion is called "reversible coding". In case of the classical block transform coding (Cosine, Hadamard, Haar and etc) we have to make the number of levels of the transform coefficient very large in order to reconstruct the input signal with no distortion. In this paper we propose reversible Hadamard transform matrices. We give a recursion methods for generation of various type of real and complex reversible Hadamard transform matrices of higher order and corresponding fast transform algorithms.

Huffman Coding and Applications in Compression for Vector Maps

2013 ◽  
Vol 333-335 ◽  
pp. 718-722
Author(s):  
Xing Ke Liu ◽  
Ke Chen ◽  
Bin Li
Keyword(s):  
High Efficiency ◽  
Huffman Coding ◽  
Vector Maps ◽  
Coding Method ◽  
Lossless Coding

Huffman coding is a statistical lossless coding method with high efficiency. The principal and implementation of Huffman coding is discussed and Huffman coding is implemented to the compression of vector maps. The property of the algorithm is discussed. Experiments demonstrated that the algorithm proposed can compress vector maps with high efficiency and no loss.

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