Error conceal device and error conceal method

Details Error conceal device and error conceal method Error conceal device and error conceal method

2005-03-01

2010-10-05

Chawan, Vijay B (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S226000, C704S228000, C704S221000, C704S233000, C714S747000, C714S755000, C714S761000, C714S766000, C375S240160, C375S240010

Reexamination Certificate

active

07809556

ABSTRACT:
The conventional error conceal processing generates a greatly fluctuating irregular sound which is unpleasant to ears and causes a remarkable echo effect and click noise. A notification signal detection unit (301) judges processing for an input frame. In case of an error frame, a sound detection unit (303) makes judgment whether a preceding non-error data frame is a sound signal. If it is a sound frame, a sound copying unit (304) generates a replacing frame. If it is a non-sound frame, a transient signal detection unit (305) judges whether it is an attack signal by the transient signal detection and selects an appropriate area from the preceding non-error frame.

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