Title :
A study on new DCT-based bit rate reduction algorithm and variable speed playback for a home-use digital VCR
Author :
Lee, Je H. ; Seo, Jeong T. ; Park, Yong C. ; Youn, Dae H. ; Oh, Tack S.
Author_Institution :
Gold Star Co. Ltd., Seoul, South Korea
fDate :
8/1/1992 12:00:00 AM
Abstract :
A discrete cosine transform (DCT)-based block adaptive image data compression scheme is proposed for a home-use digital video cassette recorder (VCR). The technique maintains a high picture quality at a moderate bit rate. To attain a reasonable picture quality in high-speed playback, a segment forming method and a recording sequence of the encoded data were developed. The coding constraints for high-speed playback are reviewed. The coding scheme proposed for bit rate reduction in a digital VCR is described. Computer simulation results are presented. The simulation results show that the bit rate reduction scheme could attain not only subjectively good picture quality in normal-speed playback, but also an acceptable picture quality in high-speed playback
Keywords :
data compression; digital communication systems; discrete cosine transforms; image coding; video tape recorders; DCT; bit rate; bit rate reduction algorithm; block adaptive image data compression; coding; computer simulation results; digital VCR; digital video cassette recorder; discrete cosine transform; encoded data; picture quality; recording sequence; segment forming method; variable speed playback; Audio recording; Bit rate; Commercialization; Data compression; Gold; Image segmentation; Magnetic heads; Maintenance engineering; Robustness; Video recording;
Journal_Title :
Consumer Electronics, IEEE Transactions on
