| 摘要 |
<p>A PAL television signal is modified in that the vertical blanking interval includes a plurality of data items each representing picture-dependent, e.g. movement, information from a related area of the picture being transmitted, there being typically several thousand such areas. The additional data may be used in a receiver to improve decoding by switching between picture-delay and line-delay decoding, or to assist in upconversion to a higher line and/or field standard for display by varying the type of interpolation used.</p> |
