Video narration
Socho tumhare paas ek mixed wave hai—jaise ek song ka sound—upar neeche complex zigzag. Sawaal: isme kaun-kaun si simple waves chhupi hain? Fourier transform bas yehi karta hai. Ye time ke graph ko uthata hai, aur puchta hai: “Har frequency kitni present hai?” Visualize karo ek prism: white light andar, rainbow bahar. Waise hi, mixed signal andar, aur bahar ek frequency bar-chart jaisa breakdown—low bass se high treble tak. Har bar ki height batati hai us frequency ki strength. Iska fayda? Jab tumhe noise hatana ho, bass boost karna ho, ya image ko compress karna ho, tum seedha “ingredients list” par kaam karte ho, poore wave par nahi. Phir inverse Fourier transform un ingredients ko jod ke wapas original signal bana deta hai. Simple idea: complex cheez ko simple sine waves ki language mein translate karna.