| 摘要 |
PCT No. PCT/GB84/00245 Sec. 371 Date Feb. 27, 1985 Sec. 102(e) Date Feb. 27, 1085 PCT Filed Jul. 9, 1984 PCT Pub. No. WO85/00493 PCT Pub. Date Jan. 31, 1985.Chrominance component signals of two different types are produced such that the chrominance signals alternate within a field and between adjacent fields in order to provide an improved amount of information from which to enhance the vertical chrominance resolution of a television receiver. The appropriate chrominance structure is either provided by a special source or else a conventional source is filtered in order to produce the appropriate structure. The filter comprises two portions, one for filtering chrominance signals of a first type from a first field and one for filtering chrominance signals of a second type from the first field in order to provide interpolated signals. A specific filter structure is disclosed which may be used for either pre- or post-filtering.
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