NOISE SUPPRESSION PROCESS AND DEVICE

摘要

A noise suppression process (S_OUT) for a decoded signal comprising a first decoded signal portion (S_CELP) and a second decoded signal portion (S TDAC) has the following steps: determining a first energy envelope generating curve (ENV_CELP) and a second energy envelope generating curve (ENV_TDAC) of the first signal portion (S_CELP) and of the second decoded signal portion (S_TDAC); forming an identification number (R) depending on a comparison of the first and second energy envelope generating curves (ENV_CELP, ENV_TDAC); deriving an amplification factor (G) which depends on the identification number (R); advantageously multiplying the second decoded signal portion by the amplification factor, which leads to the desired reduction of pre-echo and post-echo interference noises.