Source Channel Coding Approach to Generate Tamper Proof Images
نویسندگان
چکیده
منابع مشابه
Joint source-channel subband coding of images
This paper proposes a new adaptive source-channel coding scheme in the context of subband coding. We rst express the total mean-squared distortion su ered by the source in terms of source and channel distortions of the subbands. We then minimize this total distortion by an appropriate choice of source and channel coding rates for the subbands. This corresponds to casting the conventional bit al...
متن کاملA Practical Approach to Lossy Joint Source-Channel Coding
This work is devoted to practical joint source channel coding. Although the proposed approach has more general scope, for the sake of clarity we focus on a specific application example, namely, the transmission of digital images over noisy binary-input output-symmetric channels. The basic building blocks of most stateof the art source coders are: 1) a linear transformation; 2) scalar quantizati...
متن کاملAn information-spectrum approach to joint source-channel coding
Given a general source V = fV gn=1 with countably in nite source alphabet and a general channel W = fW ng1 n=1 with arbitrary abstract channel input and output alphabets, we study the joint source-channel coding problem from the information-spectrum point of view. First, we generalize Feinstein's lemma (direct part) and Verd u-Han's lemma (converse part) so as to be applicable to the general jo...
متن کاملSignal processing for joint source channel coding of digital images
An example of arithmetic coding : The source symbols are a, b, c with p(a) = 0.011, p(b) = 0.011, p(c) = 0. Wavelet coefficients of test images. Subbands are independently scaled. Most energy is concentrated in the low frequency (upper-left) subbands and a few coefficients in other subbands (in the locations of edges).. 2.6 (a)-A factor graph for a [6, 3, 3] binary code C. Function nodes are dr...
متن کاملRate allocation criteria in source-channel coding of images
In progressive joint source-channel coding of images, experiments show that optimizing rate allocation according to PSNR criteria and according to rate criteria produce essentially similar results – a very important observation because optimization by rate is often much easier. This paper presents analysis to uncover the reason for – and the generality of – these empirical results. We first exa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: INTERNATIONAL JOURNAL OF RECENT TRENDS IN ENGINEERING & RESEARCH
سال: 2019
ISSN: 2455-1457
DOI: 10.23883/ijrter.conf.20190304.026.poksd