The performance of striped disk arrays is governed by two parameters: the stripe unit size and the degree of striping. In this paper, we describe techniques for determining the stripe unit size and degree of striping for disk arrays storing variable bit rate continuous media data. We present an analytical model that uses the server configuration and the workload characteristics to predict the l...

A number of recent studies have investigated scheduling tech niques in support of variable bit rate VBR video When compared with constant bit rate CBR video VBR has a lower storage and bandwidth requirement while providing the same quality of images However a VBR video clip might exhibit a signi cant variance in the bit rate required to support its continuous display The previous studies have p...

In this paper, we address the problem of allocating bits among pictures in an MPEG video coder to equalize the visual quality of the coded pictures, while meeting buffer and channel constraints imposed by a Video Buffer Verifier. We address this problem within a framework consisting of 1) a bit production model for the input pictures, 2) a novel lexicographic criterion for optimality, and 3) a ...

All current video compression standards employ motion compensated prediction and blockwise encoding of the prediction error using the discrete cosine transform (DCT). The DCT coe cients of each block are quantized, re-ordered into a vector, and each zero-run/ coe cient pair is encoded as a single symbol, using a variable length code (VLC) table. In this paper, we show that the use of multiple i...

In this paper, we proposed an improved SEW/REW decomposition method with pitch-dependent phase generation and a noble VBR scheme for bit rate reduction in waveform interpolative coders. The proposed decomposition is performed in the magnitude domain to reduce spectral distortions. The phase of the characteristic waveforms is generated after classifying the signal into silence, unvoiced and voic...

In this paper modeling and queuing analysis of variable-bit-rate (VBR) MPEG coded video sources transmitted over B-ISDN networks are studied. A low pass version of the aggregate MPEG sequence is examined so that the network resources are analytically predicted. Based on this simplified signal, a discrete-state continuous-time Markov chain is proposed to approximate the MPEG video traffic. Then,...

In MANETs, there are many routing protocols like table-driven and on-demand routing protocols. Among these protocols, on-demand routing protocols are very sensitive in achieving the major challenges of MANET such as routing, security, bandwidth, quality of service and reliability and so on. The most popular on-demand routing protocols are Ad-hoc On-demand Distance Vector (AODV), Dynamic Source ...

This report introduces some basic issues regarding the transmission of variable bit rate (VBR) video in asynchronous transfer mode (ATM) networks with concentration on VBR video models and statistical characterises. Performance modeling for VBR video traac provides the starting point, in both the theoretical analysis and engineering design, for traac management , delay-buuer tradeoos, cell loss...

In this paper, we study the problem of power allocation for streaming multiple variable-bit-rate (VBR) videos in the downlink of a cellular network. We consider a deterministic model for VBR video traffic and finite playout buffer at the mobile users. The objective is to derive the optimal downlink power allocation for the VBR video sessions, such that the video data can be delivered in a timel...