Bad Parameter Indication for Error Concealment in Wireless Multimedia Communication

Authors:

Breddermann, T. ,  Iwelski, S. M. ,  Vary, P.

Book Title:

Proceedings of IEEE Vehicular Technology Conference (VTC-Fall)

Organization:

IEEE

Date:

Sep. 2010

ISBN:

978-1-42443-573-9

ISSN:

1090-3038

DOI:

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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