公开(公告)号：JP2002237785A

公开(公告)日：2002-08-23

申请号：JP2001332962

申请日：2001-10-30

Applicant: TELOGY NETWORKS INC

Inventor： LI DUNLING ,  SISLI GOKHAN ,  THOMAS DANIEL

IPC: G10L11/02 ,  G10L19/00 ,  G10L21/02 ,  H04B1/66 ,  H04B3/20 ,  H04B14/04 ,  H04L12/56

Abstract: PROBLEM TO BE SOLVED: To obtain a method for reducing band width quantity in transmission of a digitized voice packet. SOLUTION: The number of packets to be transmitted is reduced by interrupting the transmission by determining a silent period or a period only with noise by weighting a plurality of elements in relation to perception including frequency masking, masking with time, loudness perception based on tone and difference of audibility based on the tone as characteristics of a human and judging whether or not background noise is updated based on these factors and reduction of the band width quantity in the transmission is consequently achieved.