IEEE Consumer Electronics Magazine - July 2018 - 91

Hardware Matters

Optimizing DSP Cores
Using Design Transformation
By Dipanjan Roy, Pallabi Sarkar, Anirban Sengupta,
and Mrinal Kanti Naskar

R

eusable digital signal processing
(DSP) intellectual property (IP)
cores play a crucial role in numerous domains, including consumer electronics. However, optimizing
DSP cores is crucial for the reduction
of design area, delay, power, and so
forth [1], [2]. Though several optimization techniques using evolutionary
Digital Object Identifier 10.1109/MCE.2018.2816207
Date of publication: 13 June 2018

tions based on algebraic laws, i.e., the
associative law, commutative law, and
distributive law. All of these transformations are capable of generating a
functionally equivalent but structurally
transformed IP design.
Additionally, a bacterial foraging
optimization algorithm (BFOA)-based
design space exploration (DSE) is performed to achieve low-cost IP design.
Because of the multiple transformations and the design exploration, the

algorithms have been proposed, they
incur design overhead and exploration
time [1], [2].
This column proposes a novel methodology for optimizing DSP cores
using design transformation during
architectural synthesis. The goal is to
transform and optimize the DSP application such that the functionality of the
application remains unperturbed. The
proposed approach optimizes an IP
design through multiple transforma-

Input Block
A DSP Application in
the Form of a DFG

Output Block

Module Library, User
Constraints, BFOA Controlling
and Terminating Parameters

Perform Multiphase
Optimization

(B * A) + (A * C ) = A * (B + C)
B

A

C

A

B

×

×
+

C
+

×

Distributive-Law-Based
Transformation

Perform BFOA-Driven DSE
on Optimized Design

(A + B) + C = A + (B + C)
A

B

C

A

B

+

C
+

+

Optimized Low-Cost IP
Core

+

Associative-Law-Based
Transformation

(A + B) + C = C + (A + B)
A

B

C

C

A

+

B
+

+

+

Commutative-Law-Based
Transformation

FIGURE 1. The proposed low-cost framework for DSP IP cores.

July 2018

^

IEEE Consumer Electronics Magazine

91



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