Patent ID: 6327306
Filing Date: 2001-12-04
Classification: H04N

Abstract:
A coding apparatus comprising:a progressive converter to interpolate scanning lines decimated from an input interlaced scanning image signal deviated in vertical position of scanning lines per different timing field to convert the interlaced scanning image signal into a first progressive scanning image signal having a frame rate the same as a field rate of the input interlaced scanning image signal, and having the number of frame lines the same as the number of frame lines of the input interlaced scanning image signal;a sub-sampler to sub-sample the first progressive scanning image signal in a vertical direction to obtain a second progressive scanning image signal with scanning lines less than scanning lines of the first progressive scanning image signal, a ratio of the number of scanning lines of the second progressive scanning image signal to the number of scanning lines of the first progressive scanning image signal matching the Kell factor of the input interlaced scanning image signal; anda coder to encode the second progressive scanning image signal to obtain a compressed code train.