Seijiro Yasuki

A high performance EDTV system

An encoder and a decoder, consisting of a wide screen EDTV system compatible with current NTSC equipment, have been developed. The system, however, showed some problems that required attention. Therefore, an advanced EDTV system, consisting of an improved wide screen EDTV system and an advanced scan converting system, was developed. The former improves picture quality of the side panels and extends horizontal resolution of the center panel. The latter improves vertical resolution without the motion artifact observed in a conventional scan converter. >

A compatible wide aspect ratio TV

Describes a new proposal of wide aspect ratio TV signal format, which is fully compatible with current NTSC receivers and terrestrial transmitters. In order to realize the compatibility, the proposed signal features a new format of three dimensional frequency domain multiplexing.<<ETX>>

A New Scanning Line Conversion Technique on Frame Basis

I NTRODUCT I ON Recently, new enhanced definition wide-screen (aspect ratio 16:9) TV systems, such as PAL-plus in Europe and EDTVII in Japan, have been discussed. These systems exploit letter-box signal format to be compatible with existing TV receivers whose aspect ratio is 4:s. Such systems require scanning line conversion to reproduce full wide-screen images. We developed a new scanning line conversion technique. In the new technique, namely frame base processing like an inter-field processing, is applied to motion images as well as stationary images instead of the intra-field processing. The new technique can considerably eliminate the residual aliasing component and improve the vertical high resolution.