KM Portal

Low Bit Rate Speech Multiplexer Tools
Research Output | Dar Al-hikmah Library | IIUM Only

In multiplexing many sources are combined in a common channel to maximise the bandwidth of the system. There can be many components of the STDM such as compressed speech sources at lower rates, voice activity detectors and lost frames reconstruction. This chapter briefly explains all three major components for the under lying multiplexer architectu

Codebook Excited Linear Predictive Coding
Research Output | Dar Al-hikmah Library | IIUM Only

In standard Codebook Exited Linear Coding (CELP) the encoding method uses random values for excitation vectors. The excitation is modelled by the codebook. Each time a segment of speech is encoded and an excitation vector is matched to minimise the error between original and encoded signal to maintain quality of speech. This chapter narrates the CE

multi-Pulse Residual Excitation Model (mp-Pre)
Research Output | Dar Al-hikmah Library | IIUM Only

The Multi-Pulse Residual Excitation (MP-PRE) is a modified version of PRELP. The design of MP-PRE considers that after short term and long term correlations yet some correlation exist over the onset and sudden transitional regions where the energy of the signal is rising. This chapter explains the MP-PRE algorithms ofencoding speech at low bit rate

Discontinuous Transmission and Multiplexing
Research Output | Dar Al-hikmah Library | IIUM Only

Discontinuous Transmission (DTX) is a concept used in some mobile standards, mostly in Groupe Special Mobile (GSM) systems. In DTX systems, Voice Activity Detection (VAD) and comfort noise are essential element. The usage of DTX in the systems allo\vs transmissions during activity periods and remains silent during non-activities. This chapter is de

Damage Assessment of Liquid Filled Container Subjected to Free Fall on Rigid Steel Plate
Research Output | Dar Al-hikmah Library | IIUM Only

Chemicals can be a great threat to society and to the environment, despite its wide usage III industrial applications. Extra precautions have to be taken into account, considering the increasing numbers of accident cases involving chemical-transp0l1ing tanks. Precautions should be taken especially when transporting chemicals of radioactive nature.

Experimental Results of Pipe Whip Impact
Research Output | Dar Al-hikmah Library | IIUM Only

Pipe whip is a safety related issue for nuclear power and chemical plants, where pipes are often used to transport fluids at high pressure and high temperature. Experiment works for empty pipe and liquid filled pipe are needed in this study. The model was made of simple pipe whip system which enables the missile pipe to hit the target pipe at an an

Simulation Results of Pipe Whip Impact at 90° Angle
Research Output | Dar Al-hikmah Library | IIUM Only

The safety of pipe whip is related issue for nuclear power and chemical plants, where pIpes are often used to transport fluids at high pressure and high temperature. Simulation analysis for empty pipe and liquid filled pipe are conducted in this study. The model was made of simple pipe whip system which enables the missile pipe to hit the target pi

From ls-Prepost to ls-Dyna: an Introduction: ls-Dyna for Beginners with 13 Step by Step Solved Examples
Research Output | Dar Al-hikmah Library | IIUM Only

LS-DYNA is one of the best explicit finite element application software made by Livermore Software Technology Corporation (LSTC) which is used by engineers to predict impact, crash, and explosions scenarios. Vibrations, fluid flow, fluid structure interaction and many more engineering problems can be solved by using LS-DYNA. Present book guides the

Effect of Tapered Angle of a Conical Nose Indenter on the Energy Absorbing Variation of a Copper Pipe Subjected to Axial Crushing
Research Output | Dar Al-hikmah Library | IIUM Only

In the present research work a 100 mm long copper pipe segment with a 1 mm wall thickness is subjected to a drop weight impact by a conical shaped steel indenter with varying nose angles but constant mass. The impact velocity of the indenter was kept constant so that the kinetic energy available at impact was same for all cases. The effect of inden

Low Bit Rate Speech Coding Standards
Research Output | Dar Al-hikmah Library | IIUM Only

The main area of speech coding standards is digital telephone, cellular mobile digital radio, and satellite fixed, and mobile system. Various digital speech coding standards which are currently in use and others are being developed for such applications. Most of these standards are International Telecommunication Union (lTU) based recommendations,

Category

KCDIOM

Type

KCDIOM

KM Portal