An Analog Wavelet An Analog Wavelet Transform CMOS Imager Transform CMOS Imager Chip Chip Adeel Abbas, Saurav Panda, Vikram Shirgur Adeel Abbas, Saurav Panda, Vikram Shirgur Graduate Advisor: Shantanu Chakrabartty Graduate Advisor: Shantanu Chakrabartty 520.490 Analog and Digital VLSI Systems 520.490 Analog and Digital VLSI Systems
An Analog Wavelet Transform CMOS Imager Chip. Adeel Abbas, Saurav Panda, Vikram Shirgur Graduate Advisor: Shantanu Chakrabartty 520.490 Analog and Digital VLSI Systems. Motivations. Hardware Implementation of Image Compression Small size - PowerPoint PPT Presentation
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An Analog Wavelet Transform An Analog Wavelet Transform CMOS Imager ChipCMOS Imager Chip
Many basis functions Many basis functions available, Haar available, Haar Wavelet implementedWavelet implemented
Haar transform is a Haar transform is a combination of combination of summing and summing and difference operationsdifference operations
Hardware ImplementationHardware Implementation
Haar Transform can be realized as a Haar Transform can be realized as a Matrix Vector Multiplication problemMatrix Vector Multiplication problem
W (i,j) = ( ΣA(i)×P(i,j) ) × B(j) Multiply with either +1, 0 or -1Multiply with either +1, 0 or -1 Inputs are presented in bit-serial fashionInputs are presented in bit-serial fashion
System ArchitectureSystem Architecture
16 x 24 pixel array16 x 24 pixel array 2 CDS stages for 2 CDS stages for
inner and outer inner and outer productsproducts
Product coefficients Product coefficients input through shift input through shift registers registers