Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Dynamic resolution conversion method for low bit rate video transmission
Autore:
Nakagawa, A; Morimatsu, E; Itoh, T; Matsuda, K;
Indirizzi:
Fujitsu Labs Ltd, Personal Syst & Serv Labs, Kawasaki, Kanagawa 2118588, Japan Fujitsu Labs Ltd Kawasaki Kanagawa Japan 2118588 Kanagawa 2118588, Japan
Titolo Testata:
IEICE TRANSACTIONS ON COMMUNICATIONS
fascicolo: 4, volume: E84B, anno: 2001,
pagine: 930 - 940
SICI:
0916-8516(200104)E84B:4<930:DRCMFL>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Keywords:
video coding; H.263; MPEG-4; resolution conversion; error resilience;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Nakagawa, A Fujitsu Labs Ltd, Personal Syst & Serv Labs, Kawasaki, Kanagawa 2118588, Japan Fujitsu Labs Ltd Kawasaki Kanagawa Japan 2118588 18588, Japan
Citazione:
A. Nakagawa et al., "Dynamic resolution conversion method for low bit rate video transmission", IEICE TR CO, E84B(4), 2001, pp. 930-940

Abstract

High-speed digital data transmission services with mobile equipment are becoming available. Though the visual signal is one of the expected media to be used with such transmission capabilities, the bandwidth of visual signalis much broader than the provided transmission bandwidth in general. Therefore efficient video encoding algorithms have to be introduced. The ITU-T Recommendation H.263 and ISO/IEC MPEG-4 are very powerful encoding algorithms for a wide range of video sequences. But a large amount of bits are generated in highly active scenes to encode them using such conventional methods. This results in frame skipping and degradation of decoded picture quality. In order to keep these degradations as low as possible, we proposed a Dynamic Resolution Conversion (DRC) method of the prediction error. In the method, a reduced resolution encoding is carried out when the input scene is: highly active. Simulation results show that the proposed scheme can improveboth coding frame rate and picture quality in a highly active scene. We also present in this paper that some analysis for the performance of the DRC method under the error proof environment that is inevitable with mobile communications.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 14:05:12