Title:
SYSTEM AND METHOD FOR ERROR CONCEALMENT IN DIGITAL AUDIO TRANSMISSION
Document Type and Number:
WIPO Patent Application WO2002059875
Kind Code:
A3
Abstract:
A beat-pattern based error concealment system and method which detects drum-like beat patterns of music signals on the encoder side of the system and embeds the beat information as data ancillary to a preceding audio data interval in the transmitted compressed bitstream. The embedded information is then used to perform an error concealment task on the decoder side of the system. The beat detector functions as part of an error concealment system in an audio decoding section used in audio information transfer and audio download-streaming system terminal devices such as mobile phones. The beat detector includes a MDCT coefficient extractor, a band feature value analyzer, a confidence score calculator; and a converging and storage unit. The method provides beat detection by means of beat information obtained using both MDCT coefficients as well as window-switching information. The system may utilize a circular FIFO buffer to store audio frames from the transmitted audio signal, and a beat detector, to identify the presence of beats in the audio signal.
Inventors:
WANG YE
VILERMO MIIKKA
VILERMO MIIKKA
Application Number:
PCT/US2002/001838
Publication Date:
August 07, 2003
Filing Date:
January 24, 2002
Export Citation:
Assignee:
NOKIA CORP (FI)
NOKIA INC (US)
NOKIA INC (US)
International Classes:
G10H1/00; G10L19/00; G10L19/02; (IPC1-7): G10L19/00; G10H1/00
Foreign References:
| EP1207519A1 | 2002-05-22 | |||
| DE19736669C1 | 1998-10-22 |
Other References:
WANG Y ET AL: "A compressed domain beat detector using MP3 audio bitstreams", PROCEEDINGS OF THE ACM INTERNATIONAL MULTIMEDIA CONFERENCE AND EXHIBITION 2001 ACM MULTIMEDIA 2001 WORKSHOPS - 2001 MULTIMEDIA CONFERENCE, no. IV, 30 September 2001 (2001-09-30) - 5 October 2001 (2001-10-05), OTTAWA, ONT., CANADA, pages 194 - 202, XP002209530
WANG Y.: "A beat-pattern based error concealment scheme for music delivery with burst packet loss", 2001 IEEE INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO, ICME2001, 22 August 2001 (2001-08-22) - 25 August 2001 (2001-08-25), Waseda University, Tokyo, Japan, pages 73 - 76, XP002209531
WANG Y ET AL: "On the relationship between MDCT, SDPT and DFT", WCC 2000 - ICSP 2000. 5TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS. 16TH WORLD COMPUTER CONGRESS, 21 August 2000 (2000-08-21) - 25 August 2000 (2000-08-25), BEIJING, CHINA, Piscataway, NJ, USA, IEEE, USA, pages 44 - 47 vol.1, XP002209532, ISBN: 0-7803-5747-7
WANG Y.: "A beat-pattern based error concealment scheme for music delivery with burst packet loss", 2001 IEEE INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO, ICME2001, 22 August 2001 (2001-08-22) - 25 August 2001 (2001-08-25), Waseda University, Tokyo, Japan, pages 73 - 76, XP002209531
WANG Y ET AL: "On the relationship between MDCT, SDPT and DFT", WCC 2000 - ICSP 2000. 5TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS. 16TH WORLD COMPUTER CONGRESS, 21 August 2000 (2000-08-21) - 25 August 2000 (2000-08-25), BEIJING, CHINA, Piscataway, NJ, USA, IEEE, USA, pages 44 - 47 vol.1, XP002209532, ISBN: 0-7803-5747-7
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