TY - JOUR
T1 - Efektyvi paieškos strategija algoritmo ACELP algebriniam kodu{ogonek} vykdymo protokolui, naudojant redukuoto kandidato mechanizma{ogonek} (RCM) ir nuo iteracijos nepriklausanti{ogonek} impulso pakeitima{ogonek} (IFPR)
AU - Chu, Chao Ping
AU - Yeh, Cheng Yu
AU - Hwang, Shaw-Hwa
PY - 2014/1/1
Y1 - 2014/1/1
N2 - This work aims to present a combined version of reduced candidate mechanism (RCM) and iteration free pulse replacement (IFPR) as a novel and efficient way to enhance the performance of algebraic codebook search in an algebraic code-excited linear-prediction (ACELP) speech coder. As the first step, individual pulse contribution in each track is given by RCM, and the number N of candidate pulses is then specified. Subsequently, the replacement of a pulse is performed through the search over the sorted top N pulses by IFPR, and those of 2 to 4 pulses are carried out by a standard IFPR. Implemented on a G.729A speech codec, this proposal requires as few as 24 searches, a search load tantamount to 7.5% of G.729A, 37.5% of the global pulse replacement method (iteration=2), 50% of IFPR, but still provides a comparable speech quality in any case. The aim of significant search performance improvement is hence achieved in this work.
AB - This work aims to present a combined version of reduced candidate mechanism (RCM) and iteration free pulse replacement (IFPR) as a novel and efficient way to enhance the performance of algebraic codebook search in an algebraic code-excited linear-prediction (ACELP) speech coder. As the first step, individual pulse contribution in each track is given by RCM, and the number N of candidate pulses is then specified. Subsequently, the replacement of a pulse is performed through the search over the sorted top N pulses by IFPR, and those of 2 to 4 pulses are carried out by a standard IFPR. Implemented on a G.729A speech codec, this proposal requires as few as 24 searches, a search load tantamount to 7.5% of G.729A, 37.5% of the global pulse replacement method (iteration=2), 50% of IFPR, but still provides a comparable speech quality in any case. The aim of significant search performance improvement is hence achieved in this work.
KW - Algebraic codebook search
KW - Iteration-free pulse replacement
KW - Reduced candidate mechanism (RCM)
KW - Speech codec
UR - http://www.scopus.com/inward/record.url?scp=84902795309&partnerID=8YFLogxK
U2 - 10.5755/j01.itc.43.2.4946
DO - 10.5755/j01.itc.43.2.4946
M3 - Article
AN - SCOPUS:84902795309
VL - 43
SP - 183
EP - 187
JO - Information Technology and Control
JF - Information Technology and Control
SN - 1392-124X
IS - 2
ER -