huffman-code Questions
1
Solved
I'm trying to understand compression in PNG - but I seem to
find a lot of contradictory information online ...
I would like to understand
- how is searching done in the LZ77-part: hash table wit...
Transonic asked 16/2, 2014 at 21:8
3
Solved
I am writing a compression program, and need to write bit data to a binary file using c++. If anyone could advise on the write statement, or a website with advice, I would be very grateful.
Apolog...
Sponger asked 1/2, 2011 at 11:21
3
Solved
A quick tutorial on generating a huffman tree
Confused about Huffman Trees. Near the end of that link above, it shows the tree with 2 elements left, and then the completed tree. I'm confused about...
Winfrid asked 8/6, 2010 at 1:10
2
Solved
I am working on a Huffman Encoding program and I am almost finished but I am stuck in an infinite recursion loop. Does anyone have an idea where this is going wrong?
This is the error I am gettin...
Crucifixion asked 7/12, 2012 at 7:45
1
Solved
here is the skinny (scroll down to see the problem): I am doing Huffman Encoding to compress a file using PHP (for a project). I have made the map, and made everything into a string like so:
00101...
Uuge asked 6/11, 2012 at 19:50
3
We have a database encoded with Huffman coding. The aim here is to copy on the GPU it with its associated decoder; then on the GPU, decod the database and do stuff on this decoded database without ...
Angell asked 10/6, 2010 at 10:5
3
Solved
Under what conditions does Huffman encoding make a string not compressible? Is it when all the characters appear with equal frequency/probability? And if so, how can one show this is true?
Apanage asked 22/7, 2012 at 15:13
3
Solved
I am using huffman algorithm to develop a file compressor and right now I am facing a problem which is:
By using the algorithm to the word:
stackoverflow, i get the following result:
a,c,e,f,k,l,...
Marozas asked 28/6, 2012 at 21:24
1
Solved
I've recently constructed a CPU implementation of Huffman encoding in C++. I've also constructed a GPU version in CUDA in order to compare times, but I've come across a problem when testing the CPU...
Toplofty asked 30/4, 2012 at 4:48
2
Solved
I've been trying to think since HOURS about this TopCoder problem and couldn't come with a perfectly working solution and found the one given below that is insanely beautifully used!
I'm trying to...
Confine asked 27/4, 2012 at 18:10
1
Solved
I made jpeg decoder, but I didn't implement restart markers logic. That is reason why my program don't work on some images (for example images saved with Photoshop: File->Save As->jpeg). I want to ...
Duhamel asked 5/1, 2012 at 19:40
1
Solved
I'm having problem with parsing jpeg file. When I hit SOS (start of scan) marker, there are few bytes which meaning I don't understand. In picture bellow, after SOS marker, there are 2 bytes for he...
Gauntry asked 14/12, 2011 at 20:39
3
Solved
I'm just beginning to learn about file compression and I've run into a bit of a roadblock. I have an application that will encode a string such as "program" as a compressed binary representation "0...
Maisonette asked 26/11, 2011 at 0:43
6
Solved
A Prefix Code is a set of codes such that no code is a prefix of another code. For example, the following set is a prefix code:
10
11
000
001
0100
0101
0110
0111
With n = 8 members. I think thes...
Letdown asked 6/9, 2011 at 15:54
2
Solved
Is there an easy generalization of Huffman coding trees for situations where the resulting alphabet is not binary? For instance, if I wanted to compress some text by writing it out in ternary, I co...
Velites asked 27/3, 2011 at 21:18
2
Solved
just built a small webapp for previewing HTML-documents that generates URL:s containing the HTML (and all inline CSS and Javascript) in base64 encoded data. Problem is, the URL:s quickly get kinda ...
Tarpon asked 10/11, 2010 at 13:1
1
Solved
I read somewhere that organizing HTML attributes in a certain order can improve the rate of compression for the HTML document. (I think I read this from Google or Yahoo recommendation for faster si...
Gautea asked 17/10, 2010 at 0:4
5
What is the best compression algorithm that allows random reads/writes in a file?
I know that any adaptive compression algorithms would be out of the question.
And I know huffman encoding w...
Stamina asked 25/10, 2008 at 13:38
3
Solved
i am trying to create a Huffman tree by reading in a file and counting the frequency of each letter space symbol etc. i'm using a Priorityqueue to queue the items from smallest to largest but when ...
Elizabethelizabethan asked 22/7, 2010 at 0:53
2
Solved
This is a question I ran into in school settings, but it keeps bugging me so I decided to ask it here.
In Huffman compression, fixed-length sequences (characters) are encoded with variable-length ...
Capillary asked 21/6, 2010 at 8:8
1
Solved
From my algorithms textbook:
The annual county horse race is bringing in three thoroughbreds who have never competed against one another. Excited, you study their past 200 races and summarize th...
Wellmannered asked 10/6, 2010 at 13:39
8
I've been trying to port this code to python, but there is something I do not quite understand in C++ (I do know a bit of C++ but this is beyond me):
typedef struct huffnode_s
{
struct huffnode_s...
Dactylo asked 21/5, 2010 at 20:54
1
Solved
I am implementing the huffman algorithm in C. I have got the basic functionality down up to the point where the binary codewords are obtained. so for example, abcd will be 100011000 or something si...
Citrin asked 6/12, 2009 at 20:33
1
Solved
The following block is nested by Huffman block markers
-HUFF---------------------------------------------------------------------0084-
10 0 1 2 4 3 4 6 5 6 8 a 9 4 2 3
0 1 2 11 0 3 4 21 5 12 31 ...
Orton asked 14/10, 2009 at 1:54
5
I am trying to implement the huffman algorithm for compression, which requires writing bits of variable length to a file. Is there any way in C++ to write variable length data with 1-bit granularit...
Catalogue asked 5/4, 2009 at 14:9
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