In this paper we introduce a video smoothing algorithm for MPEG compressed live video. This algorithm, called Pattern Smoothing, transmits compressed video via both Constant Bit Rate (CBR) and Variable Bit Rate (VBR) channels. In order to take advantage of the gains achieved through statistical multiplexing of multiple sources over a single link, this algorithm utilizes a CBR channel to reduce ...

In this paper, the eeects of various time scales on the management of ABR (Available Bit Rate) traac using feedback based control is studied. Since delay tolerable, the ABR applications can be allocated the remaining resources after CBR (Constant Bit Rate) and VBR (Variable Bit Rate) applications have been accommodated. To avoid excessive losses the transmission rate of the ABR applications sho...

In this paper, we present a TDMA based multiple access technique for ATM over satellite. We consider an scenario where a large number of remote stations are connected to the ATM cloud via satellite. We focus on performance evaluation for CBR, VBR and ABR traffic with markovian analysis and simulation. We calculate equivalent bandwidth for VBR traffic in order to gain statistical multiplexing, w...

In this paper, we extend our previous dynamic reservation integrated services multiple access (DRISMA) protocol for the integration of constant bit rate (CBR), variable bit rate (VBR) and unspecified bit rate (UBR) traffic over wireless ATM networks. DRISMA provides CBR services by pre-assigning slots in a frame and VBR services by reserving slots on a bandwidth-on-demand basis. By using a requ...

Existing works on ABR feedback control design basically neglected the eeect of multiple feedback loop delays and high-priority CBR/VBR traac transmission. With multiloop delays, the already existing low-frequency high-magnitude oscillations of ABR traac within each loop can become much worsened. With CBR/VBR priority traac, the original control stability conditions can be ruined. This paper pro...

Variable-bit-rate (VBR) encoding is known to provide a more consistent visual quality compared to constant-bit-rate (CBR) encoding. However, the resultant bit-rate variations greatly complicated the allocation of disk and network bandwidth in a video-on-demand system. This paper investigates a new scheduling algorithm with monotonic-decreasing rate allocations for scheduling disk retrievals and...

Brachiopod faunas from the Aptian- Cenomanian Vezk section in southwesternIran comprise ten species in six genera, namely Sellithyris cenomanensis, Sellithyris tornacensis, Sellithyris phaseolina, Phaseolina phaseolina, Tropeothyris sp., Concinnithyris subundata, Kingena arenosa, Cyclothyris difformis, Cyclothyris sp. and Cyclothyris compressa. All species are recorded for the first time from t...