Noise reduction of image sequences as preprocessing for MPEG2 encoding
Peter M.B. van Roosmalen, Anil C. Kokaram, Jan Biemond · 1998
This paper investigates the influence of three classes of noise reduction filters as preprocessors to MPEG2 coding of noisy image sequences. From each class we select a representative noise filter that performs well and we investigate the effects of these on the coding efficiency. We also investigate the use of an adjusted MPEG2 compression scheme for simultaneous noise reduction and compression. The quality of the filtered sequences are evaluated objectively and subjectively after MPEG2 coding at bitrates varying from 1.0 to 6.5 Mbit/s. 1. INTRODUCTION With the advent of digital compression techniques such as MPEG, the home viewer will be able to choose from a great number of channels in the near future. These channels require programming, and, due to the high cost of creating new programs, many old films will be re-used. This will only be viable if the quality (both visual and audio) of those films meets the standards that the modern viewer is accustomed to. Many authors have propo...