Title :
Implementation of IMDCT for MPEG2/4 AAC on 16-bit fixed-point digital signal processors
Author :
You, Shingchern D. ; Hou, Yo-Cheng
Author_Institution :
Inst. of Comput. & Commun., Nat. Taipei Univ. of Technol., Taiwan
Abstract :
MPEG-2/4 AAC coding standard provides coded music with high quality. Since the IMDCT used in the standard for a long window has a length of 2048, it is necessary to use a fast algorithm for lower complexity. When these algorithms are implemented on a fixed-point environment, arithmetic accuracy becomes a problem. This paper discusses this issue and suggests a suitable algorithm to be used for 16-bit fixed-point digital signal processors (DSPs).
Keywords :
audio coding; digital signal processing chips; discrete cosine transforms; fixed point arithmetic; 16 bit; 16-bit fixed point digital signal processors; DSP; MPEG2-4 advanced audio coding standard; fixed point arithmetic; inverse modified DCT; Arithmetic; Audio coding; Central Processing Unit; Clocks; Costs; Decoding; Digital signal processing; Digital signal processing chips; Digital signal processors; Signal processing algorithms;
Conference_Titel :
Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-8660-4
DOI :
10.1109/APCCAS.2004.1413003
