Global Patent Index - EP 0996112 A2

EP 0996112 A2 2000-04-26 - Silence compression coding/decoding method and device

Title (en)

Silence compression coding/decoding method and device

Title (de)

Verfahren und Vorrichtung zur komprimierenden und Kodierung/Dekodierung von Stille

Title (fr)

Procédé et dispositif de codage/décodage à compression de silence

Publication

EP 0996112 A2 (EN)

Application

EP 99120614 A

Priority

JP 29815298 A

Abstract (en)

A silence compression coding / decoding method and device of the same enables sound quality of background noise at the time of decoding and transmission efficiency to be improved while selecting either silence compression coding processing or regular coding processing corresponding to background noise level of input speech signal in digital image / speech transmission. A background noise measuring section compares background noise component level 'Sm' in every input frame with discrimination threshold value data 'Srf' in background noise level discrimination section. When the background noise component level 'Sm' exceeds the discrimination threshold value data 'Srf', switches SW1, SW2 select coder (regular coding processing). When the background noise component level 'Sm' does not exceed the discrimination threshold value data 'Srf', switches SW1, SW2 select silence compression correspondence coder (silence compression coding processing). Thus each result of selection is transmitted to decoder. The decoder implements either regular decoding processing or decompression decoding processing according to in-active / active flag stored in frame transmitted from a silence compression coding selector. When the background noise level is large, the device reduces sound quality deterioration of the background noise at the time of decoding while implementing regular coding processing. <IMAGE>

IPC 1-7 (main, further and additional classification)

G10L 19/00

IPC 8 full level (invention and additional information)

H04Q 3/00 (2006.01); G10L 11/06 (2006.01); G10L 19/00 (2006.01)

CPC (invention and additional information)

G10L 19/012 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

EP 0996112 A2 20000426; EP 0996112 A3 20020626; JP 2000124915 A 20000428; JP 3061039 B2 20000710

INPADOC legal status


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