Method of recording and reproducing reduced image data correlate

Details Method of recording and reproducing reduced image data correlate Method of recording and reproducing reduced image data correlate

1996-06-19

1999-12-14

Tran, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386109, H04N 576

Patent

active

060028351

ABSTRACT:
Reduced images are obtained when image data are reproduced and kept at a uniform size while image data representing original images and image data representing reduced images are recorded on a recording medium efficiently. When image data are recorded on a memory card having a recording capacity of less than 50 megabytes, the original-image data are subsampled at a prescribed subsampling ratio to obtain reduced-image data. The reduced-image data and data representing the numbers of pixels of the reduced image in the horizontal and vertical directions thereof are recorded in the header area of the memory card. At playback, the reduced-image data and the numbers of pixels of the reduced image in the horizontal and vertical directions recorded on the memory card are read from the memory card. On the basis of the data representing the numbers of pixels of the reduced image in its horizontal and vertical directions, interpolation processing or subsampling processing is applied to the reduced-image data in such a manner that the reduced image takes on a fixed size. When the reduced-image data that have been subjected to the interpolation or subsampling processing are applied to a display unit, the reduced image having the fixed size is displayed in prompt fashion.

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