Title :
Video communications with optimal intra/intermode switching over wireless Internet
Author :
Shen, Yushi ; Cosman, Pamela C. ; Milstein, Laurence B.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
A robust scheme is presented for the efficient transmission of packet video over a heterogeneous channel. The channel consists of a wireless link with bit errors and a wired (e.g., Internet) channel with packet erasures. The scheme uses a source encoder that switches optimally between intracoding and intercoding with fixed-length packets. Different resynchronization schemes are considered and compared. A cyclic redundancy check (CRC) outer coder concatenated with an inner rate-compatible punctured convolutional (RCPC) coder are used as forward error correction (FEC). The scheme is evaluated over the simulated wireless Internet channel, and is shown to have promising performance.
Keywords :
Internet; convolutional codes; cyclic redundancy check codes; error statistics; forward error correction; packet radio networks; packet switching; visual communication; bit errors; cyclic redundancy check outer coder; forward error correction; heterogeneous channel; inner rate-compatible punctured convolutional coder; intra-intercoding; optimal intra-intermode switching; packet erasures; packet video transmission; resynchronization schemes; video communications; wired channel; wireless Internet channel; wireless link; Communication switching; Concatenated codes; Convolutional codes; Cyclic redundancy check; Cyclic redundancy check codes; Forward error correction; Internet; Packet switching; Robustness; Switches;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
DOI :
10.1109/ACSSC.2003.1292245
