Approaches to layered coding for dual-rate wireless video transmission

Author

Khansari, Masoud ; Zakauddin, Awais ; Chan, Wai-Yip ; Dubois, Eric ; Mermelstein, Paul

Author_Institution

INRS Telecommun., Verdun, Que., Canada

Volume

1

fYear

1994

fDate

13-16 Nov 1994

Firstpage

258

Abstract

Visual communications over wireless networks require the efficient and robust coding of video signals for transmission over wireless links having time-varying channel capacity. The authors compare several schemes for encoding video data into two priority streams, thereby enabling the transmission of video data over wireless links to be switched between two bit rates. An H.261 (p×64) algorithm is modified to implement each candidate scheme. The algorithms are evaluated for a microcellular wireless environment and a clear-channel bit rate of 65 kb/s. The results show that by combining layering with automatic-repeat request (wireless-)link control, almost-wireline visual quality can be achieved

Keywords

automatic repeat request; cellular radio; channel capacity; time-varying channels; video coding; visual communication; 65 kbit/s; H.261 (p×64) algorithm; automatic-repeat request; clear-channel bit rate; dual-rate wireless video transmission; layered coding; microcellular wireless environment; priority; time-varying channel capacity; video data; video signals; visual communications; visual quality; Automatic repeat request; Bit rate; Channel capacity; Delay; Error correction; Fading; Throughput; Time-varying channels; Video coding; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 1994. Proceedings. ICIP-94., IEEE International Conference

Conference_Location

Austin, TX

Print_ISBN

0-8186-6952-7

Type

conf

DOI

10.1109/ICIP.1994.413315

Filename

413315