Results 121 to 130 of about 1,866 (211)

ON THE CODING GAIN OF DYNAMIC HUFFMAN CODING APPLIED TO A WAVELET-BASED PERCEPTUAL AUDIO CODER

open access: yes, 2008
This paper evaluates the coding gain of using a dynamic Huffman entropy coder in an audio coder that uses a wavelet-packet decomposition that is close to the subband decomposition made by the human ear. The subband audio signals are modeled as samples of
M. Rosa Zurera   +4 more
core  

Estimating the size of Huffman code preambles

open access: yes, 1993
Data compression via block-adaptive Huffman coding is considered. The compressor consecutively processes blocks of N data symbols, estimates source statistics by computing the relative frequencies of each source symbol in the block, and then synthesizes ...
Mceliece, R. J., Palmatier, T. H.
core  

KOMPRESI FILE AUDIO DENGAN MENGGUNAKAN ALGORITMA ADAPTIVE HUFFMAN CODING PADA JARINGAN CLIENT - SERVER

open access: yes, 2006
Kompresi data (pemampatan data) merupakan suatu teknik untuk memperkecil jumlah ukuran data (hasil kompresi) dari data aslinya. Pemampatan data umumnya diterapkan pada mesin komputer, hal ini dilakukan karena setiap simbol yang dimunculkan pada komputer ...
Yuniar Siregar, Rani
core  

Adaptive Combined Source and Channel Decoding with Modulation for Rayleigh Fading Channels

open access: yes, 2016
In this paper, an adaptive system employing combined source and channel decoding with modulation is  proposed for slow Rayleigh fading channels. Huffman code is used as the source code and Convolutional code is  used for error control.
Soyjaudah, KMS, Rajkumarsingh, B
core   +1 more source

Digital compression and coding of continuous-tone still images

open access: yes, 2008
This CCITT Recommendation | ISO/IEC International Standard was prepared by CCITT Study Group VIII and the Joint Photographic Experts Group (JPEG) of ISO/IEC JTC 1/SC 29/WG 10.

core  

Secure compression using adaptive Huffman coding

open access: yes, 2000
Recent developments in the Internet and Web based technologies require faster communication of multimedia data in a secure form. Standard compression algorithms such arithmetic coding schemes, and propose methods of protecting against these attacks.
Philip Ogunbona (19582399)   +2 more
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A Review on RSA-Huffman Hybrid: towards Secure, Compressed and Adaptive Network Data Transmission

open access: yes
The RSA-Huffman hybrid model, which combines asymmetric encryption and lossless compression, has become a viable answer to the increasing demands for safe and effective data transfer.
B, Ezra,, I, Manga,, O, Sarjiyus,
core   +1 more source

ML-BASED BLOCK PARTITIONING FOR ADAPTIVE HUFFMAN CODING

open access: yes
This project introduces an adaptive Huffman coding method that uses machine learning to guide block partitioning during lossless compression. It extracts statistical features like byte frequency distribution, Shannon entropy, run-length statistics, and local symbol variation over sliding windows of the input stream to detect changes in data ...
openaire   +1 more source

The Construction of Huffman Codes is a Submodular (`Convex') Optimization Problem over a Lattice of Binary Trees

open access: yes, 1996
. We show that the space of all binary Huffman codes for a finite alphabet defines a lattice, ordered by the imbalance of the code trees. Representing code trees as path-length sequences, we show that the imbalance ordering is closely related to a ...
Prasad Ram, D. Stott Parker
core  

Efficient Retinal Image Compression Based on Modified Huffman Algorithm

open access: yes, 2019
Medical image diagnosis acts an important role recently to protect the life and cure illnesses and therefore practice of medical images is radically improved.
Eswaran, Chikkanan   +2 more
core  

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