Performance evaluation of packet scheduling and synchronization algorithms for wireless multimedia systems

Author(s):  
A. Boukerche ◽  
H. Owens II
VLSI Design ◽  
2001 ◽  
Vol 12 (3) ◽  
pp. 301-315 ◽  
Author(s):  
Koon-Shik Cho ◽  
Jun-Dong Cho

The increasing prominence of wireless multimedia systems and the need to limit power capability in very-high density VLSI chips have led to rapid and innovative developments in low-power design. Power reduction has emerged as a significant design constraint in VLSI design. The need for wireless multimedia systems leads to much higher power consumption than traditional portable applications. This paper presents possible optimization technique to reduce the energy consumption for wireless multimedia communication systems. Four topics are presented in the wireless communication systems subsection which deal with architectures such as PN acquisition, parallel correlator, matched filter and channel coding. Two topics include the IDCT and motion estimation in multimedia application.These topics consider algorithms and architectures for low power design such as using hybrid architecture in PN acquisition, analyzing the algorithm and optimizing the sample storage in parallel correlator, using complex matched filter that analog operational circuits controlled by digital signals, adopting bit serial arithmetic for the ACS operation in viterbi decoder, using CRC to adaptively terminate the SOVA iteration in turbo decoder, using codesign in RS codec, disabling the processing elements as soon as the distortion values become great than the minimum distortion value in motion estimation, and exploiting the relative occurrence of zero-valued DCT coefficient in IDCT.


Author(s):  
G.P. Sotiropoulos ◽  
D.K. Styliaras ◽  
E.A. Kosmatos ◽  
C.A. Papagianni ◽  
N.D. Tselikas ◽  
...  

Author(s):  
Petri Mahonen

Information Technology is one of the most rapidly developing areas in the technological world. In fact, the classical information technology that has been based on computer technology is now very quickly converging with telecommunication. Wireless networking, especially mobile telecommunications, has been one of the leading areas in business and technology during the last five years. The state-of-the art in mobile telecommunication has reached a point, where new products are introduced within a cycle of one year. The next big step shall be the introduction of wireless multimedia services through next generation wireless networks. The standardization of wireless multimedia systems is a very difficult task, as the standards shall include the crucial points in the two domains, telecommunications and information technology. It is becoming more and more difficult to recruit enough expertise for the technical committees to produce high quality standards in the converging information technology and telecommunication market domain. In this chapter, we will be using this domain as an example for the standardization difficulties of future. The reasons have to be strong for initiating a standardization process, especially concerning industry, due to the fact that it is rather expensive to produce new and extensive standards. It has been estimated that the expenses of developing a single part of the Ethernet standards amount to approx. $10,000,000 (Spring & Weiss, 1994). The main development costs arise from the time, travel and salaries of the committee members. The standardization expenses are usually prohibitive for small and medium sized enterprises (SMEs). If the standardization organizations and committees can not guarantee that the investments done towards standardization are worthwhile we will have lots of problems in the future.


2014 ◽  
Vol 20 (7) ◽  
pp. 1759-1776 ◽  
Author(s):  
Elisangela Aguiar ◽  
André Riker ◽  
Eduardo Cerqueira ◽  
Antônio Abelém ◽  
Mu Mu ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document