A document discusses causal and non-causal systems in digital signal processing. It classifies systems as either causal or non-causal. Causal systems only have outputs that depend on current and previous inputs and not on future inputs. Non-causal systems can have outputs that depend on past, present, and future inputs. The document was presented by Dr. M. Bakrutheen AP(SG)/EEE and Mr. K. Karthik Kumar AP/EEE at the National Engineering College, K.R. Nagar, Kovilpatti.

1. 15EE55C – DIGITAL SIGNAL PROCESSING AND ITS
APPLICATIONS
CLASSIFICATION OF SYSTEMS –
CAUSAL AND NON CAUSAL SYSTEMS
Dr. M. Bakrutheen AP(SG)/EEE
Mr. K. Karthik Kumar AP/EEE
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
NATIONAL ENGINEERING COLLEGE, K.R. NAGAR, KOVILPATTI – 628 503
(An Autonomous Institution, Affiliated to Anna University – Chennai)

2. CAUSAL AND NON CAUSAL SYSTEMS

3. PROBLEMS