Title :
Memory and computationally efficient psychoacoustic model for MPEG AAC on 16-bit fixed-point processors
Author :
Huang, Shih-Way ; Chen, Liang-Gee ; Tsai, Tsung-Han
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
When MPEG AAC encoders are implemented on 16-bit fixed-point processors, the constraints of low complexity and limited data word length become challenges, especially on the critical algorithm, the psychoacoustic model (PAM). This paper proposes a very efficient PAM design, concerning the reduction of memory requirement and computational complexity while maintaining the audio quality.
Keywords :
audio coding; fixed point arithmetic; signal representation; 16 bit; MPEG AAC encoders; audio quality; audio signal energy representation; computational complexity reduction; computationally efficient PAM; fixed-point processors; logarithmic representation; masking threshold; memory efficient PAM; memory requirement reduction; psychoacoustic model; Algorithm design and analysis; Audio recording; Bandwidth; Computational complexity; Costs; Distortion; Masking threshold; Psychoacoustic models; Quantization; Table lookup;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465297
