[Mp4-tech] subbands in Mpeg4 AAC

[Shreya Pathak]

Hi,
  1)I wanted to how many subbands are there in Mpeg4 AAC.
  2) Are the subbands and scale factor bands same ?
  3) Can Joint stereo coding, PNS and TNS be applied to all subbands or only some parts of subbands.
Please reply immediately.
Thanks and Regards
Shreya
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