Title :
The use of steganography to enhance error detection and correction in MPEG-2 video
Author :
Robie, David L. ; Wu, Ning ; Mersereau, Russell M.
Author_Institution :
Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The transmission of data is always subject to corruption due to errors; however, video transmission, because of its real time nature, must often deal with these errors without retransmission of the corrupted data. Our MPEG-2 compliant codec uses data hiding principles to transmit parity checking information for the DCT coefficients and uses side information (as provided in the MPEG-2 standard) to enhance the recovery of lost differentially encoded values. This information allows for improved resynchronization by correctly resynchronizing at least 7 times as often, reducing the number of macroblocks in error by a factor of 2 and improving the PSNR of error regions by at least 8 dB (in I frames) while uncorrupted picture quality decreases by less than 0.5 dB PSNR. Our work also demonstrates the ability to recover lost differential motion vectors by transmitting final values.
Keywords :
data compression; data encapsulation; discrete cosine transforms; error correction; error detection; parity check codes; synchronisation; vectors; video codecs; video coding; visual communication; DCT coefficients; MPEG-2 video; PSNR; data hiding; differential encoding; differential motion vectors; error correction; error detection; parity checking information; resynchronization; steganography; video codec; Computer errors; Decoding; Discrete cosine transforms; Error correction; Image coding; PSNR; Redundancy; Steganography; Transform coding; Video compression;
Conference_Titel :
Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7576-9
DOI :
10.1109/ACSSC.2002.1196973
