Title :
DVC decompression with denoising for picture quality improvement
Author :
Dhaou, I.B. ; Defée, Lrek
Author_Institution :
Signal Process. Lab., Tampere Univ. of Technol., Finland
fDate :
8/1/1997 12:00:00 AM
Abstract :
Digital video cassette (DVC) is a quickly proliferating new standard for real-time digital video recording. DVC is presently used both in consumer and professional applications. In this paper we describe the DVC principles, data organization and video decoding algorithm. Although typically DVC video has very good quality, at low-light levels noise becomes pronounced. We show that noise in the DVC can be reduced by digital postfiltering. For this purpose, a wavelet denoising algorithm is suggested due to its unique properties. Wavelet denoising is described in detail and results of noise reduction are illustrated on examples
Keywords :
data compression; decoding; digital communication; digital filters; digital magnetic recording; image enhancement; interference suppression; optical noise; telecommunication standards; video coding; video recording; wavelet transforms; DVC decompression; consumer applications; data organization; digital postfiltering; digital video cassette; low-light levels; noise reduction; professional applications; real-time digital video recording; standard; video decoding algorithm; wavelet denoising algorithm; Decoding; Discrete cosine transforms; Filtering; Image coding; Noise level; Noise reduction; TV; Transform coding; Video compression; Video recording;
Journal_Title :
Consumer Electronics, IEEE Transactions on