An Analytical Treatment of Channel-induced Distortion in Run Length Coded Subbands
نویسنده
چکیده
We present an analytical framework for describing the distortion in an image communications system that includes wavelet transformation, uniform scalar quantization, run length coding, entropy coding, forward error control, and transmission over a binary symmetric channel. Simulations performed using ideal source models as well as real image subbands connrm the accuracy of the distortion description. The resulting equations can be used to choose channel code rates in an unequal error protection scheme in which subbands are protected according to their importance.
منابع مشابه
Real Time Adaptive PR-QMF Bank Design for Image Coding Using Interior-Point Algorithm
A fast algorithm for designing two-channel perfect reconstruction quadrature mirror filter (PR-QMF) banks for real time image coding is presented. This interior-pointbased optimization algorithm finds a wavelet filter that allows the least amount of energy in the higher frequency subbands. Once such a wavelet filter has been found, only the lowfrequency band is used by a chosen advanced lossy i...
متن کاملInfluence of Induced Magnetic Field and Partial Slip on the Peristaltic Flow of a Couple Stress Fluid in an Asymmetric Channel
This paper describes the effects of induced magnetic field and partial slip on the peristaltic flow of a couple stress fluids in an asymmetric channel. The two dimensional equation of couple stress fluid are simplified by making the assumptions of long wave length and low Reynolds number. The exact solutions of reduced momentum equation and magnetic force function have been computed in wave...
متن کاملPrediction of the response to repetitive transcranial magnetic stimulation by spectral powers of prefrontal regions of brain.
Introduction: Quantitative assessments of the effects induced by repetitive transcranial magnetic stimulation (rTMS) are crucial to develop more efficient and personalized treatments. Objectives: To determine the spectral powers of different subbands of EEG correlated with treatment response to rTMS. Materials and Methods: the spectral powers of different...
متن کاملParallel Transmission Framework for Layered Coded Multimesdia Data over Spectrally Shaped Channels
This paper presents a new parallel transmission framework for reliable multimedia data transmission over spectrally shaped channels using multicarrier modulation. We propose to transmit source data layers of different perceptual importance in parallel, each occupying a number of subchannels. New loading algorithms are developed to efficiently allocate the available resources, e.g. transmitted p...
متن کاملCoded-DPIM for Non-Diffuse Indoor Optical Wireless Communications
Digital Pulse Interval Modulation (DPIM) technique coded using a 1/3 code rate convolutional codes with 3constraint length is presented. The channel model used is that of the non-diffuse environment with no multipath induced dispersion. Coding DPIM results in an improved packet error rate performance compared with uncoded DPIM but at the price of increased bandwidth requirement while maintainin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997