Computationally efficient implementation of AMR speech coder

KJ Byun*, Hee Bum Jung, Minsoo Hahn, KS Kim

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

5 Citations (Scopus)

Abstract

The Adaptive Multi-Rate speech codec consists of eight source codecs with bit rates from 4.75 to 12.2 kbit/s. This paper presents an AMR implementation especially focused on reducing the computational complexity. In order to reduce the computational load, we propose the fast codebook search method that is simply modified version of the depth first tree search method used in algebraic codebook search in the AMR codec. For the AMR implementation we designed the 16 bit fixed-point DSP based on the TeakLite DSP core, which was tailored for the AMR implementation. The implemented AMR codec requires only 19.6 MIPS of computation for the highest complexity mode of the AMR by using the fast search method and exploiting the DSP architecture and managing the memory structure efficiently. It is verified with all the test vectors provided by 3GPP, and stable operation on the real-time testing board was also confirmed.

Original languageEnglish
Title of host publicationISPA 2003: proceedings of the 3rd international symposium on image and signal processing and analysis, pts 1 and 2
EditorsS Loncaric, A Neri, H Babic
Place of PublicationZagreb,Croatia
PublisherUNIV ZAGREB, FACULTY MECHANICAL ENGINEERING & NAVAL ARCHITECTURE
Pages528-531
Number of pages4
ISBN (Print)953-184-061-X
DOIs
Publication statusPublished - Sep 2003
Externally publishedYes
Event3rd International Symposium on Image and Signal Processing and Analysis (ISPA) - Rome, Italy
Duration: 18 Sep 200320 Sep 2003

Conference

Conference3rd International Symposium on Image and Signal Processing and Analysis (ISPA)
CountryItaly
CityRome
Period18/09/0320/09/03

Cite this

Byun, KJ., Jung, H. B., Hahn, M., & Kim, KS. (2003). Computationally efficient implementation of AMR speech coder. In S. Loncaric, A. Neri, & H. Babic (Eds.), ISPA 2003: proceedings of the 3rd international symposium on image and signal processing and analysis, pts 1 and 2 (pp. 528-531). Zagreb,Croatia: UNIV ZAGREB, FACULTY MECHANICAL ENGINEERING & NAVAL ARCHITECTURE. https://doi.org/10.1109/ISPA.2003.1296953