Block-based frequency scalable technique for efficient hierarchical coding

@article{Lee2006BlockbasedFS,
  title={Block-based frequency scalable technique for efficient hierarchical coding},
  author={Jooheung Lee and Narayanan Vijaykrishnan and Mary Jane Irwin and Rajarathnam Chandramouli},
  journal={IEEE Transactions on Signal Processing},
  year={2006},
  volume={54},
  pages={2559-2566}
}
In this paper, we propose a block-based frequency scalable technique for efficient hierarchical coding. The proposed technique divides an image into its multiple resolution versions, based on the spectral properties of discrete cosine transform (DCT) kernels. We present that spectral decomposition, downsampling, and DCT operations are performed effectively over input DCT coefficients of one-dimensional (1-D) and two-dimensional (2-D) signals by using the proposed transform matrices. The… 

Figures and Tables from this paper

A Semi- One Time Pad Using Blind Source Separation for Speech Encryption
TLDR
It is demonstrated that the proposed scheme is immune against traditional attacks and obtains the advantages of a One Time Pad encryption while avoiding its drawbacks in key exchange.
DESIGN AND IMPLEMENTATION OF A VOICE ENCRYPTION SYSTEM USING FRACTIONAL-ORDER CHAOTIC MAPS
TLDR
This study proposed a fractional-order chaotic crypto scheme on specialized hardware platforms like DSP or FPGA development boards and its validation and robustness checking will conducted against threats and will compared to other classical encryption algorithms will carried out.
A blind source separation based cryptography scheme for mobile military communication applications
TLDR
A preliminary cryptanalysis study is presented that verifies the adequacy of the new scheme for use in mobile military communication units and other applications where security is critical and is immune to some of the attacks to which existing methods were believed to be vulnerable.
A speech encryption using fractional chaotic systems
TLDR
Results show that the original speech is well masked in the ciphertexts yet recovered faithfully and efficiently by the present schemes.
Blind source separation for digital data protection
TLDR
This paper is concerned with a low complexity technique for data protection that could be widely used as an affordable add-on in such cases as mobile phone networks or IP networks.
Optimizing Dynamic Logic Realizations For Partial Reconfiguration Of Field Programmable Gate Arrays
TLDR
A case-study application is developed that implements one partial reconfiguration module to demonstrate the functionality and benefits of time multiplexing and reveal the improved efficiencies of the latest large-capacity FPGA architectures.

References

SHOWING 1-10 OF 28 REFERENCES
A comparative study of DCT- and wavelet-based image coding
TLDR
It is believed that the image and video compression algorithm should be addressed from the overall system viewpoint: quantization, entropy coding, and the complex interplay among elements of the coding system are more important than spending all the efforts on optimizing the transform.
A frequency scalable coding scheme employing pyramid and subband techniques
TLDR
A conditional replacement scheme which switches adaptively between the pyramid and subband approaches at the coefficient level was studied and increases the overall coding efficiency of the scalable coder by up to 1 dB.
A fast scheme for image size change in the compressed domain
TLDR
An algorithm for downsampling and also upsampling in the compressed domain which is computationally much faster, produces visually sharper images, and gives significant improvements in PSNR (typically 4-dB better compared to bilinear interpolation).
Spatial scalable video coding using a combined subband-DCT approach
  • U. Benzler
  • Engineering, Computer Science
    IEEE Trans. Circuits Syst. Video Technol.
  • 2000
TLDR
Experimental results at a bit rate of 6 Mbit/s show that the reference coder MPEG spatial scalable profile (SSP) leads to a loss of more than 2.2-dB peak signal-to-noise ratio (PSNR) compared with nonscalable MPEG-2 coding at the same bit rate, whereas the proposed combined subband-DCT scheme is able to achieve a decrease of less than 0.4 dB in PSNR.
Fast algorithms for DCT-domain image downsampling and for inverse motion compensation
TLDR
This work describes an alternative approach wherein the compressed stream is processed in the compressed, discrete cosine transform (DCT) domain without explicit decompression and spatial domain processing, so that the output compressed stream, corresponding to the output image, conforms to the standard syntax of 8/spl times/8 blocks.
A scheme for spatial scalability using nonscalable encoders
TLDR
A scheme that achieves spatially scalable coding of video by employing nonscalable video encoders (e.g., MPEG-2 main profile), along with a downsampler and an upsampler, which has a separable implementation.
Image/video spatial scalability in compressed domain
TLDR
Two novel techniques are proposed, namely, format compatible (FC) discrete cosine transform (DCT) and format modified (FM) DCT to implement image/video spatial scalability directly in the DCT compressed domain to achieve a comparable performance at a much lower computational complexity compared to the spatial-domain techniques.
Techniques and Standards for Image, Video, and Audio Coding
TLDR
International standards for image, video and audio coding, including ITU-T H.263 Very Low Bit-rate Coding, and MPEG-2 Generic Coding Algorithms are presented.
Manipulation and Compositing of MC-DCT Compressed Video
TLDR
This work proposes algorithms to manipulate compressed video in the compressed domain using the discrete cosine transform with or without motion compensation (MC), and derives a complete set of algorithms for all aforementioned manipulation functions in the transform domain.
Fast algorithm and implementation of 2-D discrete cosine transform
An algorithm for the fast computation of a 2-D discrete cosine transform (DCT) is presented. It is shown that the N*N DCT, where N=2/sup m/, can be computed using only N 1-D DCTs and additions,
...
...