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huffman decoding - 23rd January, 09:52 Huffman algorithm for lossless compression is widely used in modern video, image and audio encoding standards such as mp3, aac, jpeg, mpeg2, mpeg4 etc... Once the huffman tree is built the encoding process is very simple. Each word which needs to be encoded is looked up in the huffman tables and it's encoded translation is output in the bitstream. The process on the decoder's side is much more complex because it doesn't know in advance, in the bitstream, the seperation between the different encoded words. The huffman algorithm guarantees that an encoded word never starts be another valid encoded word (a bit like phone numbers : what if someone else had the first part of your phone number as a phone number, nobody could ever reach you...). In short, the easiest way through for the decoder is to read one bit at a time and check in the huffman tables if the encoded word is found. Of course this process can be slighly accelerated by sorting the huffman tables by code length but it remains very slow. In fact the most widespread technique for huffman decoding uses lookup tables. A huffman encoded word can be decoded in only one lookup (sometimes two if necessary). The technique is slighly tricky because it requires to create 'different' tables based on the classic huffman tree but in most cases it's really worth it. I found this page which explains it all : Practical Huffman Coding (http://www.compressconsult.com/huffman/) > Comments (3) > More news

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Topic of the post Author Viewed Install "Torque game engine advanced" mahdavi 232 watermarking 3D using wavelet transfome mira 231 High-Frequency ranges of a speech signal (discription of) RSousa 185 import the KDD Cup 1999 and multiobjective genetic algorithm with matlab wasiswa 151 matlab code shagha_J 143 import the KDD Cup 1999 wasiswa 97 matlab codes in high dimensional data clustering rebelfirst 66 How to read, write and modify a wave file using Delphi halimi 51

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Topic of the post Author Posts image processing 402 face recognition 388 Motion Detection khhem 154 MATLAB code help please.... 125 Webcam programming Mirko 106 Looking for MATLAB source code for mp3 compression Liu Ming ye 70 Matlab source code for genetic algorithm based fuzzy controller 49 Union & intersection of meshes 49 About Beat Detection Article yov 32 TO BE READ BEFORE POSTING : Forum rules and policies Fred 29 Matlab source code on Specch Recongition System? andy 27 image processing using MATLAB 25 MATLAB Programming phoenix133231 25 About this forum Fred 22 event detection in video 20 Face Recognition 20 video coding for wavelet compression 20 Image reading in C/C++ 20 car plate recognition?? help!!! 19 MATLAB source code for 'template matching' 19

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Topic of the post Author Date Matlab source code for genetic algorithm based fuzzy controller ZAHRAMAHDI 2nd Jul, 14:27 Matlab source code for genetic algorithm based fuzzy controller ZAHRAMAHDI 2nd Jul, 14:10 Matlab source code for genetic algorithm based fuzzy controller ZAHRAMAHDI 2nd Jul, 14:04 Matlab code for MPEG/h.264 video encoding and decoding prakop 2nd Jul, 12:21 Webcam programming Vabs 30th Jun, 10:23 MATLAB code help please.... tp1977_ece 30th Jun, 09:03 matlab codes in high dimensional data clustering rebelfirst 29th Jun, 09:27 MATLAB code help please.... Harry86 29th Jun, 02:54 How to read, write and modify a wave file using Delphi halimi 28th Jun, 10:35 MATLAB code help please.... ashishk013 27th Jun, 10:00 MATLAB code help please.... Harry86 26th Jun, 00:29 MATLAB code help please.... Mohit 25th Jun, 11:19 MATLAB code help please.... Mohit 25th Jun, 11:18 MATLAB code help please.... sandeepkuber 25th Jun, 08:51 handwritten text recognition Mohit 25th Jun, 08:41 CFP: ISNN2010 (June 6-9, 2010; Shanghai, China) corycountree 19th Jun, 20:51 MATLAB code help please.... shagha_J 19th Jun, 20:30 matlab code shagha_J 19th Jun, 20:13 Speech recognition: Matlab source code archilles 17th Jun, 12:49 Lip and eyes segmentation archilles 17th Jun, 12:40 Speech recognition: Matlab source code sujata 17th Jun, 09:29 Mean Shift algorithm serene 17th Jun, 09:00 MPEG video compression codes needed!!!!!!!! mostafasign 16th Jun, 09:39 Matlab code for MPEG/h.264 video encoding and decoding mostafasign 16th Jun, 09:36 import the KDD Cup 1999 and multiobjective genetic algorithm with matlab wasiswa 13th Jun, 06:36

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Idea Subject Author Date Is there anybody who knows any coding on crack detection? Nuroul 12th May, 09:48 Feedback delay in linear and non-linear control system with input disturbances. abhi16007 5th Apr, 14:10 Face recognition pearllyn 23rd Mar, 02:57 can anybody help Me for code for network codng in MATLAB Muhammad 6th Jan, 14:18 face recognition using eigen face method with neural networks chiti 7th Nov, 12:53 steganography mano 23rd Oct, 09:35 Shape Texture extraction from face image using Matlab nive 10th Oct, 13:35 micro controllers,quality assesment measure for colour images shanthi_ec885 28th Aug, 07:57 stock exchange decession making tools by back propagation nural network csayantan 24th Jul, 17:51 palm and hand geometry based person identification naved 7th Oct, 09:53

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Topic Author Date Hand-written characters recognition nagaarcot 20th May, 07:46 Hand-written characters recognition nagaarcot 20th May, 07:43 Hand-written characters recognition nagaarcot 20th May, 07:41 Hand-written characters recognition nagaarcot 26th Mar, 09:59 Traffic Simulator yeek01 6th Mar, 07:49 Traffic Simulator yeek01 6th Mar, 07:46 Traffic Simulator ruthy 17th Oct, 04:33 Traffic Simulator opraveen 27th Sep, 13:32 Traffic Simulator Mees 15th Sep, 23:55 palm and hand geometry based person identification sweethana 6th Mar, 15:45

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Code name Author Date Serial Port Programming C++ source code logisch 11th May, 18:22 FFT Java source code (Simple radix-2 recursive) vidya_Angel 19th Nov, 18:53 FFT Java source code (Simple radix-2 recursive) vidya_Angel 19th Nov, 18:47 LPC (Linear Predictive Coding) matlab source hijjawe_Jo 18th Sep, 18:43 FFT C source code (Simple radix-2) trishmitch 24th Apr, 15:24 LPC (Linear Predictive Coding) matlab source vikram8712 17th Apr, 09:23 Serial Port Programming C++ source code zingaroo3x 18th Feb, 15:47 Kernel PLS (Partial Least Squares) for regression chaile 6th Feb, 17:37 JPEG Decoder Source Code aalok 8th Oct, 13:48 Bitmap .bmp file format load / How to load bitmaps. mremci 30th Jul, 14:54