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but I didn't realise that it was illegal to use gif. Thank goodness I won't have to convert them all to jpg. There's a few million of them. Stick, thine posts bring light to mine eyes, tingles to my loins. Yea, each moment I sit, my monitor before me, waiting, yearning, needing your prose to make the moment complete. 06/19/2003 09:43:11 AM EST (>2. I've used PNGs instead of GIFs as long as I've had a website (Which is down till August, but still. I've never had any problems with them. You're not really part of the problem. 06/19/2003 10:02:01 AM EST (>4. 06/19/2003 10:04:51 AM EST (>3.
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handling. He calls it LZW, after the names of the inventors, Lempel-Ziv-Welch. The article includes a justification for data compression, an overview of common methods, and a detailed explanation and runthrough of the LZW algorithm. is released by Spencer Thomas, after the LZW article was published but before LZW was patented. readers, Spencer decided to implement the LZW algorithm he read in the magazine, completely unaware that there was a patent pending on the technique. 10th December 1985>: LZW patent is granted. September 1986>: The Sperry Corporation (owners of the Sperry Research
but I didn't realise that it was illegal to use gif. Thank goodness I won't have to convert them all to jpg. There's a few million of them. Stick, thine posts bring light to mine eyes, tingles to my loins. Yea, each moment I sit, my monitor before me, waiting, yearning, needing your prose to make the moment complete. 06/19/2003 09:43:11 AM EST (>2. I've used PNGs instead of GIFs as long as I've had a website (Which is down till August, but still. I've never had any problems with them. You're not really part of the problem. 06/19/2003 10:02:01 AM EST (>4. 06/19/2003 10:04:51 AM EST (>3.
are licensed. The GIF format becomes even more popular. The GIF format becomes even more popular. The GIF format becomes even more popular. The GIF format becomes even more popular. The GIF format becomes even more popular. So the US patent has expired. covers Germany, France, Britain and Italy and expires on the 18th June 2004. expires on the 6th June 2004. This creates an interesting legal situation where LZW-based sofware is legal to distribute in the United States, but risks patent infringement claims in or when exported to Europe, Canada and Japan. hasn't diminished GIF's popularity
GIFs into an entirely new medium that had little need for backward compatibility. In 1995, Unisys finally published a royalty sheet, exempting "non-commercial" software. By now most folks had forotton the controversy. In 1999, Unisys finally realized the web had become commercialized and got around to agressively enforcing their patent. In my view, the main 'controversy' about this whole thing is that (A) The GIF format wasn't replaced forthright back in 1990, and (B) The avalanche of new online users from 1995-1999 were not made aware of the patent issues surrounding GIF. Thus
have to pry the GIFs from my cold, dead fingers. i always found it amusing that the other side used gifs instead of pngs despite bleating about how bad patents were. 06/19/2003 05:18:36 AM EST (>4. 06/19/2003 06:01:53 AM EST (>4. 06/19/2003 01:21:30 PM EST (>5. 06/19/2003 05:05:53 PM EST (>3. 06/19/2003 05:59:40 AM EST (>3. 06/19/2003 06:38:05 PM EST (>3. 06/19/2003 01:38:09 PM EST (>2. invented new compression techniques>, had them stolen by patent, and gave up the field. 06/19/2003 08:43:12 AM EST (>3. 06/19/2003 10:23:18 AM EST (>3. I've been storing all my kiddie porn as gifs,
Center) and the Burroughs Corporation merge to form Unisys. 15th June 1987>: Bob Berry and the team at Compuserve release a new graphics file format called GIF (Graphics Interchange Format). It can handle anything from 2 to 256 colours -- wow! -- and the graphics data is compressed with LZW. Just like Spencer, they had read the LZW algorithm in a magazine and had wrongly assumed that it wasn't patented. The GIF format becomes even more popular. tries to bring up the issue in public. Unisys have been ensuring hardware manufacturers (e. modem manufacturers and Postscript printer manufacturers)
and method", it is more commonly known as the LZW patent or Unisys's GIF tax. Don't buy ram at Apple. You can save big money when you buy your memory at MacMemoryStore. Most popular compression techniques build on this technique and most archivers (e. ZIP, ZOO, ARC, gzip, LhA, CAB, Arj, RAR, StuffIt) include it in their compression methods. I only mention this to tell you it's unrelated to LZ78 or LZW. [US4,464,650]>), but the LZW derivative is widely used. Terry Welch has been working for the Sperry Research Center and invents a derivative of LZ78 with much simplified, faster dictionary
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