T.30E Color Fax Protocol Software
The Annex-E of the ITU-T T.30 Recommendation is implemented for the transmission of continuous-tone (multi-level) color and gray-scale images for Group 3 and Super G3 fax operation.
It enables the efficient transmission of high quality, full color and gray-scale images over the PSTN and other networks. The images are normally obtained by scanning the original sources with scanners of 200 pels/25.4 mm or higher and bit depths of eight bits per picture element per color component or higher.
The encoding methodology for continuous-tone (multi-level) images is based on the JPEG ITU T.81 image encoding standard. The JPEG image coding method includes both a lossy mode and a lossless mode of encoding. This annex adopts the lossy mode of encoding which is based on the Discrete Cosine Transform.
The representation of color image data is based on Recommendation T.42. It adopts a device-independent color space representation, the CIELAB space that allows unambiguous exchange of color information.
This annex explains the procedure for negotiation of the capabilities for transmission of continuous-tone color and gray-scale images. It specifies the definitions and the specifications of new entries to the Facsimile Information Field of the DIS/DTC and DCS frames of Recommendation T.30.
Information is specified pertaining to image digitization resolution (in bits/pel), sampling ratio of color components, JPEG capability, color capability, and image data scaling that is subject to negotiation in the pre-message phase of the T.30 protocol.
The technical features of encoding and decoding the continuous-tone color and gray-scale image data are described in Annex E/T.4. It describes two modes of image encoding (lossy gray-scale and lossy color) which are defined using Recommendation T.81.
Floreat’s fax modem protocols are modular, re-locatable and re-entrant to support multi-channel capability. This protocol software can operate within a multi-tasking environment or as a single task and it is supported on various DSPs and processors as well as offered in fixed and floating point C.
Floreat’s Fax Modem protocols can be integrated with Floreat’s other data modem, telephony, speech compression, VoIP, FoIP, imaging and video software for various applications.
T.30E Color Fax Protocol Software printable pdf version 
Floreat’s FloFax Software
Floreat’s FloFax includes all the fax modulation standards that are listed as requirements for the Group 3 Facsimile. This includes the following:
1) V.21 (300bps) recommendation which uses FSK (Frequency Shift Keying), in which different frequencies represent binary data. V.21 speeds are used to exchange initial capabilities of two fax machines but not to send the fax image
2) V.27ter (2400 and 4800 bps) which uses DPSK (Differential Phase-Shift Keying) in which phase differences are used to encode bits
3) V.29 (9600 bps with fallback of 7200 bps) that incorporates QAM (Quadrature Amplitude Modulation), amplitude modulation with phase shifts, and is used to transmit image data
4) V.17 (14400 bps with fall-back to 12000 bps, 9600 bps, 7200 bps), which uses TCM (Trellis Coding Modulation) that enhances reliability and supports high speeds so that this modulation scheme is used to transfer images
5) V.34 (33600 bps), which uses TCM constellations, echo-canceling and line-probing to achieve the high speeds that make it suitable for color fax transmission
Floreat’s FloFax modem software is modular, re-locatable and re-entrant to support multi-channel capability. These fax software modems can operate within a multi-tasking environment or as a single task and it is supported on various DSPs and processors as well as offered in fixed and floating point C.
Floreat’s Fax Modem software an be integrated with Floreat’s other data modem, telephony, speech compression, VoIP, FoIP, imaging and video software for various applications.
Floreat’s FloFax Software printable pdf version
Floreat Group 3 Fax over IP Software (G3 Fax over IP Software) package (real time):
V.17, V.29, V.27ter, V.21 ch.2, T.30, T.38
Floreat Group 3 Fax over IP Software (G3 FoIP Software) package (store and forward):
V.17, V.29, V.27ter, V.21 ch.2, T.30, T.37
Floreat Color Super Group 3 Fax Modem Software (Super G3 Fax Software) package:
V.34 Fax, V.17, V.29, V.27ter, V.21 ch.2, T.30, T.30E
Floreat Super Group 3 Fax Modem Software (Super G3 Fax Software) package:
V.34 Fax, V.17, V.29, V.27ter, V.21 ch.2, T.30
Floreat Group 3 Fax Modem Software (G3 Fax Software) package:
V.17, V.29, V.27ter, V.21 ch.2, T.30
Floreat Group 3 Fax Modem Software (G3 Fax Software) package (end to end):
V.17, V.29, V.27ter, V.21 ch.2, T.30, T.4, T.4 to Tiff conversion |
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