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When using LZ77 why is the compressed message longer than the decompressed version?
Dictionary coders (such as LZ77) store a segment of the message in a dictionary, and then replace each occurrence with the index into the dictionary. This works very well for repeated values, or messages that use a small portion of the possible values (such as 26 letters out of the 256 possible values in a byte). However, if the data does not repeat, or uses almost all of the possible values randomly, there will be the space used for the dictionary PLUS the space used for indexes of single occurrences. This can make the message longer.
In general terms, if the message entropy is too high, any lossless compression scheme will fail to compress the data.
What else can I help you with?
What is difference between symmetric and asymmetric compression?
symmetric compressionA data compression technique that takes about the same amount of time to compress as it does to decompress.asymmetric compressionA data compression technique that typically takes more time to compress than it does to decompress. Some asymmetric compression methods take longer to decompress, which would be suited for backup files that are constantly being compressed and rarely decompressed.
What happens when files that contain large amounts of information are zipped or compressed?
You can no longer view these files, but they will take up less space on your hard drive. If you want to view them again, just unzip it (pretty much the same way you zipped it). Compressing files is good for sending them to someone, or if you need more space on your hard drive. It gets smaller.
How is a nerve message different from a hormone message?
A nerve message and a hormone message differ primarily in their speed and method of transmission. Nerve messages, also known as nerve impulses, are electrical signals that travel quickly along neurons, allowing for rapid communication within the nervous system, such as reflex actions or muscle contractions. In contrast, hormone messages involve chemical signaling through the bloodstream, where hormones are released by glands and travel to target organs. Hormonal communication is slower but has longer-lasting effects, regulating processes like growth, metabolism, and reproduction. While nerve messages are instantaneous and localized, hormone messages are slower and can affect the entire body.
Can deleting zip files harm your computer?
No. There is no problem in deleting zip files. They are just left behind after file downloads. .zip files are compressed archives, containing 1 or more files. Deleting a .zip file will not harm your computer, as they are not system files. If you delete a .zip file, all you will lose is the files contained within. If you have already extracted the files, or if you no longer need them, they are perfectly safe to delete.
Difference between packet switching and message switching by table format?
In Packet switching the packetss are stored and forwarded from primary storage (RAM) while in Message switching the message are stored and relayed from seconadary storage (disk). In Packet switched network data are transmitted in discrete units of potentially variable length blocks called packets, while in Message switching mecahnism a node recives a message stores it until the apporiarate route is free, then sends it along. Message switching sends data units that can be of any length. Packetswitching has a maximum packet size. Any message longer than that is splitup into multiple packets.
What is difference between symmetric and asymmetric compression?
symmetric compressionA data compression technique that takes about the same amount of time to compress as it does to decompress.asymmetric compressionA data compression technique that typically takes more time to compress than it does to decompress. Some asymmetric compression methods take longer to decompress, which would be suited for backup files that are constantly being compressed and rarely decompressed.
What is the longer version e'er?
"E'er" is the short version of "Ever".
I keep getting on my computer a message that says "This version of Goggle Chrome is no longer supported. Please upgrade to a supported browser." How do I do that I'd be grateful for some help. Thanks?
I think that means that your computer is too old and can no longer be used for certain things
Is photo a short version or a longer word?
"Photo" is a shortened version of "photograph," which is the longer word referring to an image taken with a camera.
Why cant a substance no longer be compressed when changes from gas to liquid?
A lquid has a more compact structure.
What is the longer version of the Math pie?
3.141592384762674804028235255377458858477936458230261731357608653773216
What is the longer version of zoo?
Zoological garden
Why does it say 'new message' but when you check your message board it says no messages?
There could of been a message from someone that deleted their profile. This could give you a new message notification and the message isn't there any longer.
How much is emerald version?
Cheap, but no longer in stores. :(
How do you use uncut in a sentence?
The Director's version of the movie was uncut, making it longer than the edited version.
You just compressed your C drive to save disk space but now you cannot hear your audio - why?
music (and video) files are allready in a compressed format - when you attempt to compress (or even encrypt) them the music decoder will no longer be able to recognize them and either will give an error message telling you as such or will corrupt the file(s). The next time you want to compress your hdd to save (just a tiny amount of) disc space, EXCLUDE ALL OF YOUR MEDIA FILES!!!
Why doesn't iPhoto let me have a 4.0.3 version on a mac?
iPhoto version 4 is quite an old version and is probably no longer compatible with a modern Mac.
