IIT Kharagpur (via NPTEL)
Digital Voice & Picture Communication — a free online course offered by IIT Kharagpur through the NPTEL platform. Taught by Prof. Somnath Sengupta. This is an intermediate-level course designed for undergraduate and postgraduate students. Estimated duration: 30 hours (~4 days). Category: English & Communication. Certification available through SWAYAM with a nominal exam fee. All video lectures, assignments, and course materials are freely accessible.
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Free (certificate exam fee ₹150)