Energy balance in advanced audio coding encoder bit-distortion loop algorithm
Grzegorz Brzuchalski, Grzegorz Pastuszak · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2013
The paper presents two techniques of balancing energy in ScaleFactor bands for Advanced Audio Coding. The techniques allows the AAC encoder to get a better audio quality. The first one modifies Scale Factors assigned to each band after the quantization whereas the second finds and changes offsets in the quantization - just before rounding down. The implementations of the algorithms have been tested and results discussed. Results show that these techniques significantly improve the quality. At last hardware implementation possibilities are discussed.