A Steganography Method for G.729a Speech Coding

Fufang Li, Binbin Li, Liangchen Liu, Yuanyong Feng, Lingxi Peng

Table 1 G.729 CS-ACELP coding frame bit allocation

Parameters Codeword Bits number per frame LSF L0, L1, L2, L3 18 Adaptive-codebook delay index P1, P2 13 (8+5) Pitch-delay parity index bit P0 1 Fixed-codebook index C1, C2 26 (13+13) Fixed-codebook sign index S1, S2 8 (4+4) Codebook gains (stage 1) GA1, GA2 6 (3+3) Codebook gains (stage 2) GB1, GB2 8 (4+4) Total 80