A rate control algorithm based on adaptive R-Q model for MPEG-1 to MPEG-4 transcoding in DCT domain

Author

Seo, Kwang-deok ; Heo, Seong-chelo ; Kim, Jae-kyoon

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol. (KAIST), Taejon, South Korea

Volume

1

fYear

2002

fDate

2002

Firstpage

109

Lastpage

113

Abstract

This paper proposes an adaptive rate control algorithm for MPEG-1 to MPEG-4 transcoder for video transmission over networks of different capacities and characteristics. It is based on an adaptive R-Q model to follow the new target bit-rate of a transcoded bitstream. In R-Q modeling, the R-Q characteristics predicted from a previous picture of the same picture type are used in combination with the R-Q data measured for the current picture. To overcome the quantizer mismatch between MPEG-1 and MPEG-4 syntax, a gradual adaptation function is applied. It is shown that the adaptive R-Q model-based rate control can efficiently control the output bit-rate to match the target bit budget

Keywords

adaptive codes; adaptive control; discrete cosine transforms; transform coding; variable rate codes; video coding; DCT domain; MPEG-1 to MPEG-4 transcoding; adaptive R-Q model; adaptive rate control; rate control algorithm; target bit-rate; transcoded bitstream; video transmission; Adaptive control; Discrete cosine transforms; MPEG 4 Standard; Programmable control; Transcoding;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2002. ICC 2002. IEEE International Conference on

Conference_Location

New York, NY

Print_ISBN

0-7803-7400-2

Type

conf

DOI

10.1109/ICC.2002.996827

Filename

996827