PPT-Huffman Coding

Yancy Vance Paredes Outline Background Motivation Huffman Algorithm Sample Implementation Running Time Analysis Proof of Correctness Application Background Lossless compression where around 20 to 90 of savings in space. brPage 1br Huffman Codes Example Ot57569vio Braga brPage 2br Say e want to encode a text with the characters a Example Frequency 37 18 29 13 30 17 brPage 3br Total size is 37 brPage 2br Huffman Coding Given the statistical distribution of the gray levels Generate a code that is as close as possible to the minimum bound entropy A variable length code Huffman Coding Five steps 1 Find the graylevel probabilities for the ima Charles McAnany. What are the ones and zeroes?. Hard drive. Computer. ". Lorem. . ipsum. dolor sit . amet. , . consectetur. . adipisicing. . elit. , . sed. do . eiusmod. . tempor. . incididunt. 2) You and your friend have decided to use rotational encoding to encrypt messages. However, you desire something more secure than a simple 1 in 26 key system. Inspired by the Germans in WWII you d Haar. Transform. 4c8 – . Dr.. David Corrigan. Entropy. It all starts with entropy. Calculating the Entropy of an Image. The entropy of . lena. is = 7.57 bits/pixel . approx. Huffman Coding. Huffman is the simplest entropy coding scheme. 1. Image. Rich info. from visual data. Examples of images around us. natural photographic images; . . artistic and engineering drawings. scientific images (satellite, medical, etc.). “Motion pictures” => video. Kent. 1. DEFLATE Algorithm. DEFLATE uses . a combination of the . . LZ77 algorithm. and . Huffman coding. . . 2. LZ77 Algorithm. The . LZ77 . algorithm . compresses . data that . has already appeared in the . DataSets. Data Compression. Prefix Codes. A . prefix code. is a variable length code in which no codeword is a prefix of another one. e.g. a = 0, b = 100, c = 101, d = 11. Can be viewed as a . binary . The author should gaze at Noah, and ... learn, as they did in the Ark, to crowd a great deal of matter into a very small compass.. Sydney Smith, Edinburgh Review. Agenda. Encoding. Compression. Huffman Coding. Huffman coding is the most efficient way to code DCT coefficients.. Quantized DCT coefficients. What are the DCT coefficients before quantization?. They are the entries of the DCT matrix . What are the DCT coefficients after quantization?. Social systems of our primate relatives:. Old world monkeys. : Female bonded groups. Gibbons. : monogamy. Orangutans. : exploded harems. Gorillas. : true harems. Chimpanzees, . bonobos. : multi-male/female groups, male-bonded groups. Idoia. . Ochoa . and . Nima. . Soltani. . Outline. System overview. Detailed encoder description. Demonstration. Results. Extensions. Conclusions. System Overview (Encoder). R. L. DWT. Quant. Arith. -January 2021A Message from Jason Wilson KADA PresidentIf I had a crystal ball this time last year and was looking at what 2020 would hold I never would have believed the year we just experiencedHello Huffman Coding. HUFFMAN CODING EXAMPLE. CHARACTER. OCCURENCE. A. 5. B. 13. C. 7. D. 15. E. 4. A:5. B:13. C:7. D:15. E:4. HUFFMAN CODING EXAMPLE. CHARACTER. OCCURENCE. A. 5. B. 13. C. 7. D. 15. E. 4. A:5.