Patent ID: 11863958
Assignee: DOLBY LABORATORIES LICENSING CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. An apparatus for decoding a Higher Order Ambisonics (HOA) representation, the apparatus comprising:
a first processing unit for perceptually decoding a plurality of PCM encoded coefficient domain signals to determine normalised coefficient domain signals; and
a second processing unit configured to, for each normalised coefficient domain signal:
receive exponent side information;
determine a transition vector based on the exponent side information, a gain value, and a function ƒ(l) that is based on:, f
    ⁡
    (
    l
    )
   
   =
   
    
     0.25
     
      cos
      ⁡
      (
      
       
        π
        ⁢
        l
       
       
        (
        
         L
         -
         1
        
        )
       
      
      )
     
    
    +
    0.75
   
  
  ,
  

  
   
    where
    ⁢
       
    l
   
   =
   0
  
  ,
  1
  ,
  2
  ,
  …
     
  ,
  
   
    L
    -
    1
   
   ;
  
 

determine an output de-normalised vector by multiplying the transition vector with the normalised coefficient domain signal; and
outputting the output de-normalised vector.