A multiplierless letter-box converter for displaying 16:9 images on a 4:3 screen

Author

Jeong, Jechang ; Jeon, Byeungwoo

Author_Institution

Dept. of Electron. Commun. Eng., Hanyang Univ., Seoul, South Korea

Volume

5

Issue

4

fYear

1995

fDate

8/1/1995 12:00:00 AM

Firstpage

363

Lastpage

366

Abstract

This paper proposes a simple and efficient realization of letter-box conversion for displaying 16:9 images on a 4:3 screen. Compared to the true 16:9 letter-box display where 4:3 vertical decimation is used, the new method yields 5:3 display aspect ratio (slightly wider than 16:9 in the vertical direction) by using 5:4 vertical decimation, and enables the decimation filter to be implemented exactly and easily without multipliers. An efficient hardware architecture is also shown for implementing the proposed 5:4 decimation; in case of progressive scan, if requires only two m-bit adders and two m-bit 2:1 multiplexers where m is the number of bits (typically 8) per pixel. Experiment shows little visual difference between the proposed letter-box conversion and the true 16:9 display with the 4:3 decimation

Keywords

filters; television equipment; 16:9 image display; 4:3 screen; 4:3 vertical decimation; 5:3 display aspect ratio; 5:4 vertical decimation; adders; decimation filter; experiment; hardware architecture; multiplexers; multiplierless letter-box converter; progressive scan; Auditory displays; Filters; HDTV; Hardware; Image converters; Multiplexing; Pixel; Satellite broadcasting; TV broadcasting; Very large scale integration;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/76.465091

Filename

465091