Scheme for coding of progressive scanning pictures for interlaced scanning receiver

Abstract

Many TV broadcasters now use a progressive scanning format and an HDTV system to produce programs. However, standard TV receivers are still used in most homes. We have thus developed a broadcast system that uses the 480 p format for the source picture and the 480 i format for the receiver. We use progressive scanning coding because of its coding efficiency and room for improvement. The B-picture is not used as a prediction reference; we use only the interlaced scanning lines in the B-picture to remove redundant information. We use 8 × 4 DCT instead of 8 × 8 DCT for coding the residual to realize this method. Experimental results showed that the proposed coding scheme performs better than other coding schemes such as two kinds of interlaced scanning coding and progressive scanning coding in MPEG-2.