An image is to be compressed using JPEG compression that uses 4x4 blocks instead of 8x8 blocks. The remaining compression steps remain unchanged. One of the 4x4 blocks after Discrete Cosine Transform (DCT) is shown in Figure 4. 63 53 6 6 |43 33 6 6 5 5 00 5 5 00 Figure 4 a) Explain why Discrete Cosine Transform (DCT) is used instead of Discrete Fourier Transform (DFT).

An image is to be compressed using JPEG compression that uses 4x4 blocks instead of 8x8 blocks. The remaining compression steps remain unchanged. One of the 4x4 blocks after Discrete Cosine Transform (DCT) is shown in Figure 4. 63 53 6 6 |43 33 6 6 5 5 00 5 5 00 Figure 4 a) Explain why Discrete Cosine Transform (DCT) is used instead of Discrete Fourier Transform (DFT).

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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