Date: Tue, 25 Mar 97 21:37 PST From: Denis DeLaRoca <CSP1DWD@MVS.OAC.UCLA.EDU> To: multimedia@FREEBSD.ORG Subject: (Copy) New RAT release (v3.0.18) Message-ID: <199703260538.VAA17090@freefall.freebsd.org>
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---------------------------- Text of forwarded message ----------------------- From: Orion Hodson <O.Hodson@CS.UCL.AC.UK> Reply-To: rat-trap@CS.UCL.AC.UK To: rem-conf@ES.NET cc: ucl-audio@CS.UCL.AC.UK, merci@CS.UCL.AC.UK, mice-nsc-uk@CS.UCL.AC.UK Subject: New RAT release (v3.0.18) Date: Tue, 25 Mar 1997 20:51:34 +0000 Message-ID: <1554.859323094@cs.ucl.ac.uk> Sender: O.Hodson@CS.UCL.AC.UK The Robust-Audio Tool (RAT) is designed to allow multiple users to talk to each other over the internet. RAT is adaptive to network and host conditions. It is RTP compliant and can be operated in unicast and multicast modes. It is compatible with other Mbone audio tools (VAT, FreePhone, IP/TV) and offers redundant audio encoding and receiver based repair to provide improved sound quality. Further details can be found at http://www-mice.cs.ucl.ac.uk/mice/rat/. Binaries (and man page) are available at the UCL ftp server: ftp://cs.ucl.ac.uk/mice/rat/ and currently exist for Solaris, SunOS, Irix, Linux, HP-UX and Windows95. FreeBSD, and possibly OSF/1, versions will be available shortly. Users of earlier releases should upgrade now to enjoy improved audio quality and stability. This release has the following enhancements, compared to release 2.6: - Improved redundancy support - Improved packet repetition - Transcoder/mixer operation - Flakeway operation - Lecture mode - LBL conference bus compatibility - Audio device trading between multiple instances of rat/vat - Voice switching of video when combined with vic - Better RTCP compliance - L16 (16bit linear, uncompressed) codec - Improved performance of analysis-by-synthesis codecs (GSM/LPC) - New user-interface - Active speaker indication now works - Automatic audio DC bias removal - Selective muting of participants - Assorted bug-fixes A large amount of the code has been re-written to make RAT more flexible and reliable. The major enhancement in this release is the ability to operate as a transcoder. RAT will transcode between two multicast groups, unicast and multicast, and unicast-to-unicast. RAT can transcode between any combination of PCMU, L16, DVI, GSM, LPC and redundant audio, and can add/remove encryption as appropriate. Comments, suggestions, and bug-reports should be sent to rat-trap@cs.ucl.ac.uk. regards Colin, Orion, and Isidor [despite being on a plane to Greece :-) ]
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