Title :
Facsimile compression through demodulation in packet networks
Author :
Tomcik, J.D. ; Gruensfelder, M.C. ; Sherif, M.H. ; Sayre, C.L. ; Ramsden, D.B.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
Recent years have seen widespread deployment of packetized circuit multiplication equipment (PCME) and digital circuit multiplication equipment (DCME) on international transmission facilities. Both use digital speech interpolation and low rate encoding to increase traffic concentrations on the available facilities and are designed to achieve compression ratios of 5:1 or more for voice traffic. If a significant amount of facsimile traffic is being carried, however, the advantages are significantly reduced. The Facsimile Demodulation and Compression Protocol (FADCOMP) specified as part of CCITT Recommendation G.765 and its implementation and performance in the AT&T integrated Access and Crossconnect System (IACS) are described. Field data are presented to demonstrate compression ratios similar to those for voice, while service transparency is maintained
Keywords :
data compression; demodulation; facsimile; image processing; packet switching; protocols; switching networks; AT&T; CCITT Recommendation G.765; DCME; FADCOMP; Facsimile Demodulation and Compression Protocol; IACS; PCME; compression ratios; digital circuit multiplication equipment; digital speech interpolation; facsimile compression; facsimile traffic; field data; integrated Access and Crossconnect System; international transmission facilities; low rate encoding; packet networks; packetized circuit multiplication equipment; service transparency; traffic concentrations; voice traffic; Baseband; Data mining; Demodulation; Facsimile; Intelligent networks; Modems; Phase change materials; Physical layer; Protocols; Speech;
Conference_Titel :
Global Telecommunications Conference, 1992. Conference Record., GLOBECOM '92. Communication for Global Users., IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0608-2
DOI :
10.1109/GLOCOM.1992.276675
