Hi Noriaki, I assume you would like us to allocate you an encoding identifier to use for your custom encoding scheme - can you confirm that that is the case?
I note that you have a version of the UltraVNC hobby project patched with your scheme. Since the UltraVNC project is not VNC-compatible, you will need to switch to a VNC-compatible codebase if you want to provides VNC viewers & servers with your custom encoding. Cheers, Wez @ RealVNC Ltd. > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Hitachi > Systems & Services, Ltd. > Sent: 01 February 2007 05:18 > To: vnc-list@realvnc.com > Subject: Introduction of New VNC codec > > Dear VNC developer. > > > Introduction of > "ZYWRLE":Enhanced VNC codec for Motion picture > > > 1. Introduction > The lossy codec based on Wavelet transform is frequently > used in compression of natural image, motion picture and > audio stream. > But it isn't almost used in Remote Desktop protocol like > VNC because classical lossless run-length codec like ZRLE > has high performance in peculiar image which has big mono > color region like desktop image. The lack of lossy codec > cause low performance of motion picture in VNC. > We introduce new codec "ZYWRLE(ZLib YUV Wavelet Run Length > Encoding)" which applied wavelet transform partially and > is based on ZRLE. In this new codec, network traffic reduced > to 15%-50% traffic of ZRLE when we play motion picture. > > > 2. Highlight of Evalution of ZYWRLE > > Result of ZYWRLE for motion picture > +-------+-------------------+------------------+------------------+ > |quality| Raw tile(Mbytes) | Total(Mbytes) |Raw tile|PSNR(RGB)| > | | Out | Raw |rate | Comp.| Raw |rate| rate(%)| (dB) | > +-------+------+------+-----+------+------+----+--------+---------+ > | ZRLE |125.8 |125.8 |100 |117.1 |392.2 |29.8| 32.1 | INF. | > | Hi | 53.85|167.58| 32.1| 52.10|370.96|14.0| 45.1 | 28.025 | > | Mid | 31.83|264.05| 12.1| 20.56|378.50| 5.4| 69.7 | 23.980 | > +-------+------+------+-----+------+------+----+--------+---------+ > > * Comp. rate of ZRLE(about 30%) goes to > 15%(Hi-quality)/5%(Mid-quality)! > > > 3. Reference Implementation(C source code/patch for VNC Servers) > * Core Codec of ZYWRLE > > http://mobile.hitachi-system.co.jp/publications/ZYWRLE/zywrlet > emplate.c > * Patch for [EMAIL PROTECTED] V1.0.2 > > http://mobile.hitachi-system.co.jp/publications/ZYWRLE/UltraVN > C-102-ZYWRLE-diff.txt > * Patch for LibVNCServer 0.8.2 > > http://mobile.hitachi-system.co.jp/publications/ZYWRLE/LibVNCS > erver-0.8.2-ZYWRLE-diff.txt > > I think that Any VNC server can be applied ZYWRLE easlilly > using one of these patch. > > > 4. License of ZYWRLE > Though ZYWRLE is our intellectual property and was developed for > our micro-VNC, We Hitachi Systems & Services, Ltd. decided make it > open source. You can use it with no fee for commercial and/or > non-commercial purpose. The above reference implementation > are released > under our BSD-like license. More detail, see top of zywrletemplate.c. > > > 5. More detail > See our ZYWRLE > page(http://mobile.hitachi-system.co.jp/publications/ZYWRLE/) > > We are glad if your VNC server supports ZYWRLE. > > Thank you. > > --- > Noriaki Yamazaki > Administrator of micro-VNC > > Research & Developement center > Hitachi Systems & Services, Ltd. > _______________________________________________ > VNC-List mailing list > VNC-List@realvnc.com > To remove yourself from the list visit: > http://www.realvnc.com/mailman/listinfo/vnc-list _______________________________________________ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
