Domain: htv.fi
Stories and comments across the archive that link to htv.fi.
Comments · 7
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Re:First Light?This actually allready happens...
... with satellite signals.It is not even rare (atleast with biggest finnish cable provider). They are receiveing the signal via satellite most likely and when there's heavy snowstorm or rains, picture quality is really bad in some cases. So, anyone with cabledish themselves can verify this also
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Packetloss & Pings in Cable VS DSL (in finland)I have been a cable subscriber in biggest finnish cable isp called HTV now for like 2 years. And yes, many people do report that cable lines are fast and i totally agree with them. I can ftp into ftp.funet.fi and pull the latest linux iso's at speed of 600k/s. But the speed varies! The thing is that allmost every major website and software distribution site is in States and that is a killer. HTV's foreign connections are so so so so bad. I even remember downloading IE from microsoft at 8k/s while same download come at 100k/s to my office T1 line. So, speed comparisements are that accurate when comparing a technology itself. Best way imho is to compare ISP's and their services to the user eg. what kind of services they can provide to the end-user.
But to my real point. As i said, i have had this cable isp for over year now (closing on to 2) and while most of the time i get decent speed while downloading stuff, all pings are horrible. I have never and i do mean never seen steady ping under 100ms except to the next hop in my traceroute to the world. No matter if the site im pinging is in Finland, or Sweden or States, pings can vary from 80-2000ms. Thou most usually its around 130-300ms. And the frigin packet loss. 10-35%. Man, try writing code thu ssh with packet loss of 30% and ping around 500 and you see how things are with cable connections (atleast in Finland & with HTV) (And yes, there is nothing wrong in cabling, all have been tested with good equipment)
As a comparisement, all finnish isp that support DSL service have much better reputation (infact, im going to work in one) and people have made websites out of their own experience with they have turned down their cable and ordered dsl lines. Here's some "downtime" statistics pages of people who use HTV cable line. First, Second and third one
For a bit of amusement, i must say that people are starting to act like those "cable subscribers" in that Pasific Bell DSL commercial (check out adcritic for laughs, and sorry, no linux there, its in *quicktime*). Well, when i first saw it, it made me laugh too but now, its so so real.
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Re:Communism?
Nope. The Culture is Socialist, materialist and anarchist. If you don't believe me , maybe you'll believe Iain.
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Re:Security through obscurity
Someone must have thought of this before, but how easy would it be to make one yourself? A capture card, a large hard disk, a cheap processor... Sure, it'd cost more than US$399, but then you'd be calling the shots. That's gotta be worth it.
looky here --> Linux VCR -
Tons of projectsI'm a high school student, and I can think of plenty of projects I'd enjoy doing at school, many of which have been mentioned on Slashdot. I don't know if these would be appropriate for your class, but they're interesting computer-related projects:
WWWPic2 mentioned here a few weeks ago. This would also include building the Picprog Pic programmer.
Or what about building the Flash Carts for Gameboy, mentioned here.
Do the students at your school use TI-8x calculators? If so, there's lots of oppurtunities at Ticalc.org.
I hope you find some of these ideas useful.
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PNG Alpha demo
Here's a nice demo:
http://www.pp.htv.fi/hsivon e1/css-test/bitmapstyle.html
View the source. Check out the PNG in the GIMP. very cool.
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Current tech is so close, yet so far
I've been doing research on this for the last month or three, and the news isn't entirely good. First, you need to figure out exactly what you want your TiVo-esque set-top box to do. "Personal TV" features like live pause and live rewind? Digital, full-frame recording? MPEG1, MJPEG or MPEG2 compression? Channel guides and automatic VCR programming? CD playing? DVD playing? Lastly, what will you put it all in?
Let's start with personal TV features. You can currently record live, full-resolution video and audio onto your HD without dropping frames -- assuming you've got at least a 500mHz processor and a fast HD. That's just a live dump to a raw AVI, and you'll fill up your HD pretty fast that way, at roughly 1-2 meg a second. But if you can blow 4gb for an hour of programming to be able to do a live pause/rewind for a while, then that's not too big a deal. But what if you want to include digital VCR features, not just live pause/rewind?
Now, things get a little more expensive. The crux of the problem is to do live, full-frame MPEG2 video and audio encoding in software, you need at least ANOTHER 500mhz of horsepower, and a single 1gHz processor won't cut it. MPEG1 quality blows if you're recording off satellite or even decent cable TV (if you want the low-end, though, the Broadway MPEG1 encoder is cheap, around $800), leaving you with just MJPEG or MPEG2 video. MJPEG is much larger than MPEG2, because it doesn't have temporal compression, but you can get consumer-grade hardware MJPEG encoders on Matrox hardware, so for a build-your-own box, if you 2-3x your HD size, you should be okay. But to do it right, you want full-frame D1 MPEG2 encoding (half-D1 MPEG2 is MPEG1 resolution, but MPEG2 quality), like you have on DVDs. And to do that in hardware will cost you over a thousand dollars, and may not include an MPEG DEcoding solution!. Yuck. Darim's MPEGator2 can do full D1 encoding for (only) US$1800, VisionTech's MVcast is US$1995, DV Studio's Apollo Expert is US$1995 and includes both encoding and decoding, making it possibly the best buy. I have no idea if Linux drivers are available for any of them, but the price alone puts that sort of tech out of the realm of most people's hands.
With that sobering realization in mind, let's forge forward to channel guides and VCR programming. Channel guides are easy. Just have a Perl script rip and reformat any of the listings from the online providers, including Excite TV, Ultimate TV, GIST TV (which also provides the Yahoo TV listings), Ask TV (in the UK), Click TV (what TiVo uses), TV Quest, TV Grid or TV Guide Online. And once you have this set up, it's not much farther to program an IR transmitter to sit in front of your VCR's IR port to have it automatically record shows for you.
CD playing in a set-top box is a nice feature. Pop the CD in, and have it hit CDDB for the disc info, and give track options. Shouldn't be too hard.
DVD playing in a homebuild Linux-based set-top box is nearly possible now, too. As of this weekend, I believe that you can now put a DVD in the drive, and play it, entirely software decoded, no ripping VOBs or copying to a HD, full-screen, full-frame, with real-time AC3/48kHz audio downsampling to 44kHz, and audio/video sync is probably only a few hours of coding away. Now all we need is hardware MPEG acceleration in the ATI Rage chipsets, and maybe that attractive Apollo encoder/decoder.
Lastly, what are you going to put this monstrosity of open-source software engineering in? What we've just explained above is that for around $3000, you can build a combination cable box (we'll ignore the open source software cable descramblers for the moment), real-time MPEG2 digital VCR, timeshifting personal TV player, channel guide, CD player and region-code-less, restriction-less DVD player, that utterly blows the quality of anything else on the market out of the water. This is what TiVo WANTS to be. But what are you going to do? Stick a fat, ugly, beige desktop case on top of your TV? Bah. T-A-C-K-Y. Even the recently rediscovered BookPC (aka NLX) cases still look like PCs. But most people can't afford to mint custom cases, yet you want something that doesn't look like a PC. How about a 1U or 2U black rackmount case, sans locking front panel and rails? 19" wide makes it a bit wide for small TVs, but that's okay. You've got a bay for a floppy drive or small LCD panel, a DVD drive, and enough room inside for at least one HD, and in some 1U cases, both the TV card and the MPEG card! Otherwise, just go 2U, which isn't TOO much larger. Whee.
I think that's it. I don't know what the state of TV input on Linux is, but I assume it's pretty good, or you wouldn't even be able to consider this project, so that's not a big deal. And even through you can record in real-time, without compression, straight to AVI (bleagh!), I left out the possibility to post-process the AVI to MPEG, because really, that's so tacky. That's like having to play DVDs by copying them to a HD first. Do it realtime, and Do It Right(tm). Lists of MPEG hardware encoders I got from a Canadian distributor called BernClare Multimedia, Inc. Seems like a nice place. Other URLs I used for reference (no, my personal project doesn't have a site; I just posted most of my knowledge here!) include the still-conceptual LinuxVCR project, the LinuxToday article on How to Build Your Own 1U Rackmount, the Calibri 300R 1U rackmount Linux-based router, and LCDproc for that LCD display you know you'll need on the front to perpetually blink 12:00.