A variable bit rate layered DCT video coder for packet switched (ATM) networks

Author

Dixit, Sudhir ; Nardone, James

Author_Institution

GTE Lab. Inc., Waltham, MA, USA

fYear

1990

fDate

3-6 Apr 1990

Firstpage

2253

Abstract

A combined inter/intra-frame discrete cosine transform (DCT) with layered transmission of (significant) coefficient sets is proposed. In the scheme, a whole frame is either intraframe or interframe coded based on the amount of motion. In the interframe mode, a vertical strip, which cycles periodically to refresh a section of the frame, is intraframe coded. This refresh feature preserves the synchronization in the event of cell loss. The layered transmission of the coefficients allows delivery of the desired quality video, after low-energy (layered) coefficients are selectively discarded, and immunity to cell loss is achieved by utilizing the correctly received layers to compensate for the effects of lost cells in reconstructing the frame blocks

Keywords

encoding; packet switching; synchronisation; video signals; visual communication; DCT video coder; cell loss; combined inter/intra-frame DCT; layered transmission; packet switched ATM networks; synchronization; variable bit rate; Asynchronous transfer mode; B-ISDN; Bandwidth; Bit rate; Discrete cosine transforms; Error correction; Jitter; Packet switching; Propagation losses; Strips; Video coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on

Conference_Location

Albuquerque, NM

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1990.116019

Filename

116019