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Let z(n1, n2) represent an 8x8 luminance block. The DCT of z(n1, n2) is quantized using the JPEG luminance quantization Q matrix as specified in Section K, Table K.1, of the ISO/ITU-T JPEG standard document that is provided on the course web site. The resulting quantized DCT of z(n1, n2) is given by: 128 10 0 .. 0 0 -4 0 0 0 ... X,(K1, K2) = ... 0 0 ... which contains only three non-zero coefficients. (a) Using Table F.2 (page 90) and Table K.5 (pages 150 to 153) of the ISO/ITU-T JPEG standard document that is provided on the course web site, determine the JPEG bit stream for the AC coefficients. (b) What is the average bit-rate associated with these coded AC coefficients (in bits/coefficient)?

Let z(n1, n2) represent an 8x8 luminance block. The DCT of z(n1, n2) is quantized using the JPEG luminance quantization Q matrix as specified in Section K, Table K.1, of the ISO/ITU-T JPEG standard document that is provided on the course web site. The resulting quantized DCT of z(n1, n2) is given by: 128 10 0 .. 0 0 -4 0 0 0 ... X,(K1, K2) = ... 0 0 ... which contains only three non-zero coefficients. (a) Using Table F.2 (page 90) and Table K.5 (pages 150 to 153) of the ISO/ITU-T JPEG standard document that is provided on the course web site, determine the JPEG bit stream for the AC coefficients. (b) What is the average bit-rate associated with these coded AC coefficients (in bits/coefficient)?

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Let æ(n1, n2) represent an 8x8 luminance block. The DCT of r(n1, n2) is quantized using the JPEG luminance quantization Q matrix as specified in Section K, Table K.1, of the ISO/ITU-T JPEG standard document that is provided on the course web site. The resulting quantized DCT of a(n1, n2) is given by: 128 10 0 ... -4 0 ... X4(K1, K2) = 0. ... 0 0 ... which contains only three non-zero coefficients. (a) Using Table F.2 (page 90) and Table K.5 (pages 150 to 153) of the ISO/ITU-T JPEG standard document that is provided on the course web site, determine the JPEG bit stream for the AC coefficients. (b) What is the average bit-rate associated with these coded AC coefficients (in bits/coefficient)? (c) What is the JPEG bit-stream of the considered 8 x 8 block if the quantization Q matrix is a constant matrix where each element is equal to 3000?
Transcribed Image Text:Let æ(n1, n2) represent an 8x8 luminance block. The DCT of r(n1, n2) is quantized using the JPEG luminance quantization Q matrix as specified in Section K, Table K.1, of the ISO/ITU-T JPEG standard document that is provided on the course web site. The resulting quantized DCT of a(n1, n2) is given by: 128 10 0 ... -4 0 ... X4(K1, K2) = 0. ... 0 0 ... which contains only three non-zero coefficients. (a) Using Table F.2 (page 90) and Table K.5 (pages 150 to 153) of the ISO/ITU-T JPEG standard document that is provided on the course web site, determine the JPEG bit stream for the AC coefficients. (b) What is the average bit-rate associated with these coded AC coefficients (in bits/coefficient)? (c) What is the JPEG bit-stream of the considered 8 x 8 block if the quantization Q matrix is a constant matrix where each element is equal to 3000?
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