| Abstract: | Video coding for Broadband Integrated Services Digital Network (BISDN) is analysed, and coding techniques that use sub-Nyquist sampling are proposed. Specifically, recommendations are given for digital video coding for EQTV distribution in the area of BISDN at a payload rate of approximately 135 Mb/s. The contribution signal that is used in video production will either be the CCIR Recommendation 601 signal or a minor modification of it to maximize horizontal resolution. Also, the scanning parameters will be the same as NTSC so that the same monitor can be used to display either EQTV or NTSC TV. A compatible vertical improvement can be added initially, or in the future, that will provide additional vertical resolution beyond the capability of the present NTSC TV, or the capabilities of Recommendation 601. Finally, several coding techniques for video distribution are configured to maximize horizontal resolution given the above constraints. Two of these video coding techniques allow extra bandwidth by using sub-Nyquist sampling techniques together with comb filtering. This EQTV system will produce a horizontal resolution that is close to values normally used for HDTV. |
