DIGITAL IMAGE WATERMARKING CAPACITY ANALYSIS

2005 ◽  
Vol 02 (01) ◽  
pp. 55-61 ◽  
Author(s):  
FAN ZHANG ◽  
HONGBIN ZHANG
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Communication Channel ◽  
Image Watermarking ◽  
Average Energy ◽  
Capacity Analysis ◽  
Blind Watermarking ◽  
Digital Image Watermarking ◽  
Adaptive Watermarking ◽  
Analysis Scheme

In watermarking schemes, image can be considered as a communication channel to transmit messages. This paper presents a new adaptive capacity analysis scheme for image watermarking, realizes a content adaptive watermarking algorithm invisibly embedding the strongest watermark, and discusses the watermarking capacity of blind watermarking and non-blind watermarking. This paper also analyzes the relation between watermarking capacity and watermarking detection bit error rate (BER), and derives the relation between capacity and the limit of BER. According to the result of research, watermarking detection BER mainly influenced by the watermarking average energy and watermarking capacity. The BER rises with the increase of watermarking capacity.

scholarly journals A Robust Algorithm of Digital Image Watermarking Based on Discrete Wavelet Transform

2011 ◽  
pp. 58-63
Author(s):  
Shital Gupta ◽  
SANJEEV JAIN
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
Digital Image ◽  
Image Watermarking ◽  
Theoretical Models ◽  
Discrete Wavelet ◽  
Blind Watermarking ◽  
Digital Image Watermarking ◽  
Robust Algorithm ◽  
Frequency Spread

In this paper, a robust algorithm of digital image watermarking based on discrete wavelet transform is introduced It uses blind watermarking technique. Digital image watermarking is one such technology that has been developed to protect digital images from illegal manipulations. In particular, digital image watermarking algorithms which are based on the discrete wavelet transform have been widely recognized to be more prevalent than others. This is due to the wavelets' excellent spatial localization, frequency spread, and multi-resolution characteristics, which are similar to the theoretical models of the human visual system.

Desain dan Simulasi Encoder-Decoder Berbasis Angka Sembilan Untuk Transmisi Informasi Digital

2015 ◽  
Vol 6 (3) ◽  
Author(s):  
Bobby Yuhanda ◽  
Nasaruddin Nasaruddin ◽  
Syahrial Syahrial
Keyword(s):  
Computer Simulation ◽  
Bit Error Rate ◽  
Error Rate ◽  
Error Detection ◽  
Communication Channel ◽  
Multipath Fading ◽  
Digital Information ◽  
Coding Scheme ◽  
Error Detection And Correction ◽  
Information And Communication

Abstract. The development of information and communication technology is growing rapidly, particularly in the transmission of digital information. The process of transmitting digital information through the communication channel will be interferenced by noise, distortion and multipath fading so that the information is likely to experience an error or incorrect detection at the receiver, which can decrease the system performance. This research proposes the design and simulation of encoder-decoder based on the number nine to transmit digital information reliably and precisely. The goal of this research is to design and simulate the encoder decoder as a scheme of error detection and correction and to reduce bit error rate that occurs during the process of transmitting digital information. The research method uses design and computer simulation where the encoder-decoder is modeled mathematically, design is structured and a computer simulation is developed for the performance of encoder-decoder based on the number nine in the transmission of digital information. The result of this research shows that the proposed encoder-decoder can detect the errors transmission and correct the errors at receiver.Keywords: Digital information, encoder-decoder, coding scheme, and transmission information. Abstrak. Perkembangan teknologi komunikasi dan informasi saat ini sangat pesat, khususnya dalam teknologi transmisi informasi digital. Proses transmisi informasi digital melalui kanal komunikasi akan mendapat gangguan seperti noise, distorsi, interferensi dan multipath fading. Sehingga informasi yang dikirim kemungkinan akan terjadi kesalahan atau salah deteksi pada penerima, yang menyebabkan penurunan kinerja dari sistem. Penelitian ini mengusulkan suatu desain dan simulasi encoder-decoder berbasis angka sembilan untuk transmisi informasi digital, yang mampu bekerja secara handal dan tepat. Adapun tujuan penelitian ini adalah untuk merancang dan mensimulasikan encoder-decoder berbasis angka Sembilan sebagai skema deteksi dan koreksi kesalahan serta mengurangi bit error rate yang terjadi pada saat proses transmisi informasi digital. Metode penelitian yang digunakan adalah perancangan dan simulasi komputer, dimana prosesnya adalah pemodelan secara matematis, perancangan encoder-decoder, pembuatan simulasi kinerja encoder-decoder berbasis angka sembilan untuk transmisi informasi digital. Hasil penelitian ini menunjukan bahwa encoder-decoder yang diusulkan dapat mendeteksi kesalahan transmisi dan mengoreksi kesalahan pada penerima.Kata Kunci: Informasi digital, encoder-decoder, pengkodean kanal, transmisi informasi.

Digital image watermarking capacity and detection error rate

2007 ◽  
Vol 28 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Fan Zhang ◽  
Xinhong Zhang ◽  
Hongbin Zhang
Keyword(s):  
Digital Image ◽  
Error Rate ◽  
Image Watermarking ◽  
Digital Image Watermarking ◽  
Detection Error

scholarly journals Image Watermarking pada Citra Medis menggunakan Compressive Sensing berbasis Stationary Wavelet Transform

2020 ◽  
Vol 8 (1) ◽  
pp. 43
Author(s):  
YASQI HAFIZHANA ◽  
IRMA SAFITRI ◽  
LEDYA NOVAMIZANTI ◽  
NUR IBRAHIM
Keyword(s):  
Wavelet Transform ◽  
Compressive Sensing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Image Watermarking ◽  
Extraction Process ◽  
Embedding Capacity ◽  
Stationary Wavelet Transform ◽  
Final Project ◽  
Ownership Rights

ABSTRAK Watermarking pada citra medis dilakukan untuk melindungi hak kepemilikan dan keaslian sebuah citra medis. Proses embedding dan extraction dirancang menggunakan metode Stationary Wavelet Transform (SWT) dan Statistical Mean Manipulation (SMM) untuk mengubah citra host menjadi sinyal sparse kemudian memasuki proses watermarking. Citra watermark dioptimasi dengan menggunakan metode Compressive Sensing (CS). Hasil akhir dari penelitian ini menunjukkan simulasi Image Watermarking dengan Bit Error Rate (BER) mendekati nilai nol dan PSNR lebih besar dari 40 dB, tanpa diberikan serangan. Penerapan Compressive Sensing menyebabkan nilai PSNR meningkat hingga 3,5 dB dan embedding capacity menjadi empat kali lipat lebih baik. Kata Kunci: Image watermarking, Telemedicine, Stationary Wavelet Transform, Statistical Mean Manipulation, Compressive Sensing. ABSTRACT Watermarking in medical images is carried out to protect ownership rights and authenticity of a medical image. The embedding and extraction process was designed using Stationary wavelet transform (SWT) and Statistical Mean Manipulation (SMM) methods to convert the host image into a sparse signal and then enter the watermarking process. The watermark image is optimized using the Compressive Sensing (CS) method. The final result of this final project shows the simulation of Image Watermarking with the Bit Error Rate (BER) approaching zero and PSNR greater than 40 dB, without being given an attack. The application of the Compressive Sensing pursuit will cause the PSNR increase up to 3.5 dB and embedding capacity four times better. Keywords: Image watermarking, Telemedicine, Stationary Wavelet Transform, Statistical Mean Manipulation, Compressive Sensing.

scholarly journals Electromagnetic Interference of Power Converter with Random Modulation on the Power Line Communication System

Electronics ◽  
2021 ◽  
Vol 10 (23) ◽  
pp. 2979
Author(s):  
Abduselam Hamid Beshir ◽  
Lu Wan ◽  
Flavia Grassi ◽  
Paolo Stefano Crovetti ◽  
Xiaokang Liu ◽  
...  
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Communication Channel ◽  
Electromagnetic Compatibility ◽  
Power Converters ◽  
Noise Spectrum ◽  
Power Converter ◽  
Power Line ◽  
Power Line Communication ◽  
Modulation Scheme

Random Pulse Width Modulation (RPWM) allows controlling the switching signal of power converters in order to reduce the harmonic peaks by spreading the noise spectrum. Currently, many manufacturers of power converters are deploying this modulation scheme in order to comply with Electromagnetic Compatibility (EMC) test requirements. However, when the converters coexist with Power Line Communication (PLC) systems, such as in Smart Grid (SG) applications, resorting to RPWM needs further investigations since it potentially affects the communication channel by increasing the bit error rate. This possible detrimental effect is investigated in this work, by considering a PLC system for automatic meter reading (AMR) implemented in a SG application. To this end, the model of a complete PLC system is implemented in SIMULINK, and Quadrature Phase Shift Keying (QPSK) modulation is used to model the PLC modems in the communication channel. Results show that, even if the deployment of RPWM techniques may lead to an appreciable reduction/spreading of the peaks in the noise spectrum, it may also lead to an increase of the bit error rate on the PLC system.

scholarly journals RPAS Satellite Communication Channel Based on IEEE 802.11b Standard

2019 ◽  
Vol 7 (1) ◽  
pp. 32-40 ◽  
Author(s):  
Andrii Grekhov ◽  
Vasil Kondratiuk ◽  
Svitlana Ilnitska
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Communication Channel ◽  
Satellite Communication ◽  
Communication Channels ◽  
Base Station ◽  
Line Of Sight ◽  
Ieee 802.11B ◽  
Radio Line ◽  
Data Rates

Abstract Original models of RPAS communication channels based on IEEE 802.11b Standard, including both Base Station transmission within the Radio Line of Sight, and through the satellite using Beyond Radio Line of Sight, were built. Dependencies of the Bit Error Rate on the Signal-Noise Ratio for different payload data rates were obtained. Transponder nonlinearity and Base Station antenna diameter impact were analysed.

scholarly journals ИССЛЕДОВАНИЕ ЗАМИРАНИЙ В СИСТЕМЕ СВЯЗИ С ИСПОЛЬЗОВАНИЕМ ТЕХНОЛОГИИ OFDM

2018 ◽  
pp. 47-53
Author(s):  
Алексей Андреевич Бреславец ◽  
Александр Владимирович Тоцкий
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Communication System ◽  
System Performance ◽  
Rayleigh Fading ◽  
Communication Channel ◽  
Signal Propagation ◽  
Communication Link ◽  
Suggested Approach ◽  
Communication System Performance

A new technique exploited for estimating of fading influence in multipath signal propagation environment for communication system using OFDM (Orthogonal frequency-division multiplexing) technology is proposed. Rayleigh fading model is considered and studied in suggested approach. Wi-Fi network has been selected as a basis system for study performance of OFDM communication system operating in multipath and noisy communication channel. Preliminary experimental measurements and computations have been carried out in order to evaluate received signal parameters after test signal propagation through multipath communication link contaminating transmitted signal under influence of random Rayleigh fading. An algorithm has been developed that makes it possible to perform computations according considered model. Software corresponding to suggested algorithm has been developed. Proposed software contains user interface that is written in order to automate the process of computations. Developed software was examined experimentally for statistical study of interference behavior and its influence on the OFDM communication system performance. The following data were taking into account in investigations: Rayleigh fading; user's motion; number of operating OFDM subcarriers; number of receiving antennas; additive normal noise. The influence of these factors on the communication system performance was evaluated by computation the value of bit error rate (BER) values. Suggested software also gives an opportunity investigating the number of bit errors and appearance of the signal in the time and frequency domains at different stages of transmission. Computer simulations results were obtained for a sequence of test Monte Carlo runs depending on: the speed and angle of the user's traffic; the intensity of the additive Gaussian noise in communication channel; variations of the number of OFDM subcarriers; the number of antennas contained in the user equipment. Computer simulation results demonstrate the following: bit error rate values tend to increasing with increasing the user velocity as well with decreasing the number of antennas and subcarriers. It has been also shown decreasing the signal-to-noise ratio value under influence of additive noise with a Gaussian distribution according to decreasing the number of OFDM subcarriers and number of antennas in MIMO system.

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