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LZW Compression Problem 13 Years Ago by michaelzip Hi! I am currently using LZW algorithm for compressing files but it cannot compress multimedia. What possible process am I missing? Is there any method be done before entering the algorithm? Enlighten me please. Any help will do. Thanks in advance. Re: LZW Compression Problem 13 Years Ago by Narue If your algorithm is written to handle binary files (as opposed to text), then it really comes down to whether to file compresses well or not. Multimedia tends to be compressed already, so LZW might not yield good results. Re: LZW Compression Problem 13 Years Ago by michaelzip Thanks for your reply. So this means LZW cannot compress most, but not all, multimedia files such as audio, video, and images? Encoding error in GIF LZW compressed stream 11 Years Ago by NordCoder …<< LZW_MAX_BITS // Invalid code signals to flush the LZW byte buffer #define BUFFER_SIZE 255 typedef struct { Uint16 next[LZW_ALPHABET_SIZE… if (!lzw_table) { IW_SetError("Out of memory: Failed to allocate LZW table\n"); goto done; } for (i = 0; i … gif lzw error 13 Years Ago by forsakenedzero … worked till now [ICODE]from imagehex2 import* def lzw(hexList,asclist,numberbinary,numberbyte): lzw,x,numberbyte=[],0,numberbyte+1 number=numberbyte print… i ,hexList[t+11+i], hex2bin(hexList[t+11+i]) lzw.append(hex2bin(hexList[t+11+i])) xy ='' for i in… Re: Encoding error in GIF LZW compressed stream 11 Years Ago by rubberman How was the data compressed? Did you write your own LZW compression tool? From what you are saying, it sounds like the string dictionary is out-of-whack, or that you are accessing it incorrectly. Sorry, but I don't have the cycles right now to analyze your code in regards to that last comment. Re: Encoding error in GIF LZW compressed stream 11 Years Ago by NordCoder …, but I've run out of ideas. Basically, the GIF LZW algorithm allows for 4096 (2^12 or 1 <<… Motif based lzw implementation 13 Years Ago by vicky_rawat Hi All, I have implemented general LZW algorithm, if anyone can help me with motif base lzw algorithm. I will highly appriciate this. convert tiff image compression lzw to ccitt t.6 10 Years Ago by ManthanB i am having a tiff file of LZW compression and i wanted to convert the same into CCITT T.6. Is it possible? if sol please give me some advice or sample code about the same. Thanks and regards Re: convert tiff image compression lzw to ccitt t.6 10 Years Ago by Momerath Sure it is. There are plenty of examples of LZW compression if you just search for them. Decompress it, then compress it with CCITT T.6 Search engines are your friend. Converting Output Glyphs from compressed stream? 10 Years Ago by daino … have to ask it. I have a stream compressed in LZW encoding. I can decompress a stream provided it is in… I have extracted from a pdf file stream compressed in LZW. I'm assuming the below is a text representation of… a numerical form so I can run it through my LZW decompression algorithm? I know some streams are also compresse using… Re: Converting Output Glyphs from compressed stream? 10 Years Ago by daino As mentioned it's a pdf. The stream is compressed in LZW. A decimal representation of this data also gives me negative numbers when loading each charcter into an integer container like a vector? I wasn't aware there were negative numbers in LZW encoding? Given that, what could be the issue? Re: Converting Output Glyphs from compressed stream? 10 Years Ago by daino Well, it's not me pokin my nose into things. It's a pdf file stream encoded only in LZW. Re: unlicenced use of gif images 16 Years Ago by alienlinux … refering specifically to the "Unisys' LZW patent" i'm no expert but is LZW the compression technology? and maybe thats… file types and main arguments 17 Years Ago by LieAfterLie …'m making a program that compresses text files using the LZW compression algorithm and creates a seperate compressed file. I made… unlicenced use of gif images 16 Years Ago by alienlinux … support? A) This has to do with issues with Unisys' LZW patent. GIF support is turned off from Qt™ 1.44… Re: unlicenced use of gif images 16 Years Ago by alienlinux … patents (and other patents world-wide that are relevant to LZW compression), GIFs that are based on the 87a or 89a… Re: unlicenced use of gif images 16 Years Ago by John A … this problem with Konqurer (DaniWeb displays just fine). >is LZW the compression technology? Yes. It's what actually makes gifs… .Gif usage in commercial software 13 Years Ago by PixelExchange … in order to avoid infringement of Unisys' patent on the LZW compression technique." The above excerpt only really certifies that… Lossless compression (multimedia) 12 Years Ago by creative tarek Hello, i wanna ask about the suitable compression method for a text file that has a 50*50 input message and has a source alphabet (0,1,2,3), is it extended huffmann or LZW or Arithmatic or shall i mix between 2 of them ? regards Ajax JSON Gziped File 11 Years Ago by AleMonteiro … decoded = lzw_decode(result); var object = JSON.parse(str); } }); } // Decompress an LZW-encoded string // Code From http://jsolait.net/ function lzw_decode(s… Data Compression / encoding? 10 Years Ago by daino …. I've come across terms such as Flat Decode and LZW Decode but have not idea how I would use or… Re: Data Compression / encoding? 10 Years Ago by deceptikon … the simplest and work your way up: RLE, sliding window, LZW, and Huffman are the simpler algorithms. They're relatively easy… Re: Data Compression / encoding? 10 Years Ago by daino Thanks.. For now I would like to learn how to go about learning how to identify FlateDecode or LZW so that I can apply the appropriate filter when necessary. Would anyone know how I would go about learning this? Re: Data Compression / encoding? 10 Years Ago by deceptikon … example: Zip: 50 4B Rar: 52 61 72 21 Tar-LZW: 1F 9D GZip: 1F 8B DEFLATE: 78 9C Re: Data Compression / encoding? 10 Years Ago by Schol-R-LEA … metadata. For example, two different archive formats may both use LZW compression for part of their formats, yet the actual formats… Re: Data Compression / encoding? 10 Years Ago by daino Thanks. I'm starting to catch on. Knowing the below will set me on a new path for sure. *Zip: 50 4B Rar: 52 61 72 21 Tar-LZW: 1F 9D GZip: 1F 8B DEFLATE: 78 9C* Re: MPTFT.EXE problem 17 Years Ago by jd51edwin …:WINDOWSAurexkb.ehu Status: 0xc0000034 File C:WINDOWSFlgczsswjyh.lzw not found! Deletion of file C:WINDOWSFlgczsswjyh.lzw failed! Could not process line: C…:WINDOWSFlgczsswjyh.lzw Status: 0xc0000034 File C:WINDOWSIingbqeu.aaw not… Re: Can you add pictures/sounds in a win32 console app? 19 Years Ago by meabed ….c # End Source File # Begin Source File SOURCE=..\src\core\lzw.c # End Source File # Begin Source File SOURCE=..\src\core….h # End Source File # Begin Source File SOURCE=..\src\include\lzw.h # End Source File # Begin Source File SOURCE=..\src\include… Re: Aurora, DrPmon, MHTMLRedir problems 18 Years Ago by jd51edwin …/28/2004 9:10:52 PM 1073501 C:\WINDOWS\Flgczsswjyh.lzw PEC2 11/28/2004 9:10:40 PM 184535 C…