Title :
An efficient implementation of the forward and inverse MDCT in MPEG audio coding
Author :
Britanak, Vladimir ; Rao, K.R.
Author_Institution :
Inst. of Control Theory & Robotics, Slovak Acad. of Sci., Bratislava, Slovakia
Abstract :
The modified discrete cosine transform (MDCT) is employed in subband/transform coding schemes as the analysis/synthesis filter bank based on time domain aliasing cancellation (TDAC). The most efficient implementation of the forward and inverse MDCT computation for layer III in MPEG-1 and MPEG-2 international audio coding standards is proposed. It is based on a new fast algorithm for the forward and inverse MDCT computation in the oddly stacked system. The complete signal flow graphs for the implementation of MDCT and inverse MDCT in layer III are also provided.
Keywords :
audio coding; code standards; discrete cosine transforms; signal flow graphs; transform coding; MPEG audio coding; MPEG-1; MPEG-2; analysis/synthesis filter bank; complete signal flow graphs; fast algorithm; forward MDCT; international audio coding standards; inverse MDCT; layer III; modified DCT; modified discrete cosine transform; oddly stacked system; subband/transform coding; time domain aliasing cancellation; Arithmetic; Audio coding; Audio compression; Discrete cosine transforms; Filter bank; Flow graphs; Helium; Signal synthesis; Time domain analysis; Transform coding;
Journal_Title :
Signal Processing Letters, IEEE
