Abstract
Spatial transform coding has been widely applied for image compression
because of its high coding efficiency. However, in many intraframe systems,
in which every TV frame is independently processed, coding of moving
objects in the case of interlaced input signals is not addressed. In this
paper, we extend intraframe transform coding techniques for interlaced
video signals with limited additional complexity. After discussing key
aspects of an interlaced video signal, we present a simple motion-detection
scheme which is suitable for an a priori block-coding decision, thereby
saving hardware complexity. The transformer is modified to obtain either
intraframe or intrafield transformed blocks by performing partially
different fast cosine computation algorithms. As a result, the subjective
image quality of the motion-adaptive coding technique is considerably
improved as compared with the nonadaptive system.
Original language | English |
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Pages (from-to) | 345-364 |
Number of pages | 11 |
Journal | Philips Journal of Research |
Volume | 44 |
Issue number | 2/3 |
Publication status | Published - 1989 |