Joint Picture Export Group (JPEG) is the most commonly used image compression standard in the world. One cannot comprehend a CE system that does not process a JPEG. Without JPEG there is no smartphone photography, no social media. So, authors feel strongly that this important multimedia core “JPEG”needs to give well-deserving credit in terms of securing it when security/protection of “DSP core”has been a major focus of all the discussions in this book so far. The chapter is organized as follows: Section 9.2 provides an overview of DCT-based JPEG compression and decompression process. Section 9.3 explains the design process of generating structurally obfuscated JPEG CODEC IP core; Section 9.4 provides a detailed insight on the implementation process of obfuscated JPEG codec IP core in a CAD synthesis tool. Section 9.5 provides implementation and analysis of JPEG CODEC IP core as well as compressed images through the devised JPEG CODEC IP core.

Chapter Contents:

• 9.1 Introduction
• 9.2 Overview of JPEG compression and decompression
• 9.2.1 DCT-based JPEG image compression process
• 9.2.1.1 Processing of the input image
• 9.2.1.2 Perform DCT on input image
• 9.2.1.3 Perform quantization
• 9.2.1.4 Data encoding
• 9.2.2 DCT-based JPEG image decompression process
• 9.2.2.1 Data decoding
• 9.2.2.2 Perform inverse quantization
• 9.2.2.3 Perform IDCT on decompressed image
• 9.2.2.4 Reconstruct the decompressed image
• 9.3 Design process of structurally obfuscated JPEG IP core
• 9.3.1 Threat model, problem formulation, and optimization framework
• 9.3.1.1 Threat model
• 9.3.1.2 Problem formulation
• 9.3.1.3 Optimization framework
• 9.3.2 Constructing non-obfuscated DFG for JPEG compression
• 9.3.3 Generating structurally obfuscated JPEG compression IP core
• 9.3.4 Generating structurally obfuscated JPEG decompression IP core
• 9.4 Implementation of JPEG CODEC IP core
• 9.4.1 Designing obfuscated JPEG compression IP core
• 9.4.2 Designing obfuscated JPEG decompression IP core
• 9.4.3 End-to-end JPEG CODEC through designed hardware/IP core
• 9.5 Analysis on case studies
• 9.6 Conclusion
• 9.7 Exercises
• References

Inspec keywords: electronic engineering computing; data compression; integrated circuit design; codecs; data protection; image coding; multimedia systems; digital signal processing chips; discrete cosine transforms

Other keywords: CE system; JPEG codec IP core obfuscation; CAD synthesis tool; multimedia core JPEG; image compression standard; DSP core security; Joint Picture Export Group; decompression process; DSP core protection; CE devices; DCT

Subjects: Integral transforms; Digital signal processing chips; Multimedia; Electronic engineering computing; Integral transforms; Digital circuit design, modelling and testing; Computer vision and image processing techniques; Digital signal processing chips; Image and video coding