Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

mominanisar

why we use the DCT and IDCT functions in matlab for audio compression ?what DCT and IDCT do?

  • one year ago
  • one year ago

  • This Question is Closed
  1. slotema
    Best Response
    You've already chosen the best response.
    Medals 1

    DCT (Direct Cosine Transform) is a special case of the Fourrier Transform. IDCT is the inverse. (At least some) audio compression algorithms work by removing e.g. a bit of information in the high frequencies (since we're not as attuned to those frequencies as we are to others). The Fourrier Transforms (and thus also the DCT) are part of the frequency analysis necessary to achieve that.

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.