PUBLICATIONS OF THE ITU-T SECTOR 3. Series Subject area L Construction, installation and protection of cables and other elements of outside plant M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits N Maintenance: international sound programme and television transmission circuits O Specifications of measuring equipment P Telephone transmission quality, telephone installations, local line networks Q Switching and signalling R Telegraph transmission S Telegraph services terminal equipment T Terminals for telematic services U Telegraph switching V Data communication over the telephone network X Data networks, open system communications and security Y Global information infrastructure, Internet protocol aspects and next-generation networks Z Languages and general software aspects for telecommunication systems 57 ITU-T SOFTWARE Series Subject area G.191 (09/05) Software tools for speech and audio coding standardization G.722.1 (05/05) Low-complexity coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss G.723.1 (05/06) Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s G.729.1 (05/06) G.729 based Embedded Variable bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729 G.729 (03/96) Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear prediction (CS-ACELP) G.763 (10/98) Digital circuit multiplication equipment using G.726 ADPCM and digital speech interpolation G.776.1 (10/98) Managed objects for signal processing network elements G.967.1 (06/98) V-interfaces at the service node (SN) : VB5.1 reference point specification G.967.2 (02/99) V-interfaces at the service node (SN) : VB5.2 reference point specification H.264.1 (03/05) Conformance specification for H.264 advanced video coding H.264.2 (03/05) Reference software for H.264 advanced video coding H.341 (05/99) Multimedia management information base H.Sup1 (05/99) Application profile - Sign language and lip-reading real-time conversation using low bit-rate video communication J.120 (05/00) Distribution of sound and television programs over the IP network M.3120 (10/01) CORBA generic network and network element level information model P.501 (05/00) Test signals for use in telephonometry P.834 (07/02) Methodology for the derivation of equipment impairment factors from instrumental models P.861 (02/98) Objective quality measurement of telephone-band (300-3400 Hz) speech codecs