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Bad Parameter Indication for Error Concealment in Wireless Multimedia Communication
- Authors:
- Tobias Breddermann, Stanislaus Michael Iwelski, and Peter Vary
- Book Title:
- Proceedings of IEEE Vehicular Technology Conference (VTC-Fall)
- Venue:
- Ottawa, Canada
- Event Date:
- 6.-9.9.2010
- Organization:
- IEEE
- Date:
- Sept. 2010
- ISBN:
- 978-1-42443-573-9
- ISSN:
- 1090-3038
- URL:
- 10.1109/VETECF.2010.5594456
- Language:
- English
Abstract
Wireless communication of multimedia signals is often based on the transmission of source codec parameters which are protected against channel noise by channel coding. Commonly, a cyclic redundancy check (CRC) is introduced in order to check for erroneous frames after error correction. If the CRC fails, a bad frame indication (BFI) flag is set which controls a codec-specific frame error concealment. This results in the substitution of complete multimedia frames by their concealed versions even if only a few parameters may be corrupted. The proposed system is based on iterative source-channel decoding. A low complexity bad parameter indication (BPI) scheme is introduced which identifies faulty decoded parameters and enables more effective parameter-individual concealment strategies. This concept may be applied to any multimedia codec (speech, audio, video, images).
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