Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1997-09-05
2000-04-25
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
714747, G10L 2102
Patent
active
060554975
ABSTRACT:
A system and method are provided for improving speech quality for signals divided into a frame structure. Speech information in a signal is detected, and a lost or corrupted transmitted frame is detected. The lost or corrupted frame is replaced by a suitable frame if a number of frames represented e.g., by a counter value, exceeds a predetermined value. The counter value may be changed, depending on whether the system is in a comfort noise generation state or in a muting period. The frame may be replaced by a frame representing mainly background noise, generated at the transmitting end during speech pauses or at the receiving end, or such a frame and a correctly received frame. The predetermined value may be the length of a muting period or may be the number of lost or corrupted frames preceding a speech frame. A first of the correctly received speech frames that follows a number of lost or corrupted frames may also be replaced. The output frames gradually approach pure speech frames.
REFERENCES:
patent: 4593392 (1986-06-01), Kouyama
patent: 4829523 (1989-05-01), Bretl
patent: 5142582 (1992-08-01), Asakawa et al.
patent: 5309443 (1994-05-01), Schorman
patent: 5485522 (1996-01-01), Solve et al.
patent: 5491719 (1996-02-01), Sellin et al.
patent: 5572622 (1996-11-01), Wigren et al.
patent: 5699485 (1997-12-01), Shoham
patent: 5815533 (1998-09-01), Mourot
GSM Recommendations 6.10, "GSM Full-Rate Speech Transcoding," European Telecommunications Standard Institute, France, 1990 (revised Sep. 1994).
GSM Recommendations 6.11, "GSM Substitution and Muting of Los Frames for Full Rate Speech Channels, " European Telecommunications Standard Institute, France, Sep. 1994.
GSM Recommendations 6.12, "GSM Comfort Noise Aspect for Full Rate Speech Traffic Channels, " European Telecommunications Standard Institute, France, Sep. 1994.
GSM Recommendations 6.31, "GSM Discontinuous Transmission (DTX) for Full Rate Speech Traffic Channel," European Telecommunications Standard Institute, France, Sep. 1994.
GSM Recommendations 6.32, "GSM Voice Activity Detection (VAD), "European Telecommunications Standard Institute, France, Oct. 1996.
Andersson Johan
Galyas Peter
Hallkvist Per
Jung Stefan
Hudspeth David R.
Storm Donald L.
Telefonaktiebolaget LM Ericsson
LandOfFree
System, arrangement, and method for replacing corrupted speech f does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System, arrangement, and method for replacing corrupted speech f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System, arrangement, and method for replacing corrupted speech f will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1001704