[Mp4-tech] Why only low frequeny is considered in DCT?

[sagar]

Hi Xperts,
I wanted to know when we do DCT ( video preocessing), we only consider the
Low frequency elements. Why?
DCT is used for taking out spatial reduncies, and DCT is basically used to
decorrelate energy in the image.
And other fact being low frequency contains high energy,
If anybody could answer my question, i would be thankful.
Warm Regards,
Sagar
  -----Original Message-----
  From: mp4-tech-bounces lists.mpegif.org
[mailto:mp4-tech-bounces lists.mpegif.org]On Behalf Of Luo Daniel
  Sent: Wednesday, November 22, 2023 8:26 PM
  To: mp4-tech lists.mpegif.org
  Cc: Luo Daniel
  Subject: [Mp4-tech] Transport stream analyer
  Dear all,
  Do you know if there is any free software TS analyzer that can perform
buffer verification?
  Thanks!
  Jiancong Luo
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