Method to compensate for a fade in a digital video input sequenc

Details Method to compensate for a fade in a digital video input sequenc Method to compensate for a fade in a digital video input sequenc

1998-03-23

2000-03-21

Peng, John K.

Television

Image signal processing circuitry specific to television

Special effects

348700, 348701, 348393, 348396, H04N 974, H04N 712, H04N 514

Patent

active

060408758

ABSTRACT:
A method to compensate for a fade in a digital video input sequence is provided where the video input sequence is to be compressed according to the MPEG-2 video compression standard. The method comprises a first step of dividing each frame of a current frame into two fields. In a second step, each field of the current frame is divided into at least one field band. In a third step, the luminance and chrominance pixel values are individually summed for the pixels in each field of the current frame. In a fourth step, the luminance pixel values are summed for the pixels in each field band of the current frame. In a fifth step, each respective field band sum and field sum of the current frame is compared with that of the previous frame in the video input sequence. In a sixth step, detection of whether or not a fade has occurred is provided, based upon the comparison in the fifth step. In a seventh step, the encoding algorithm is adjusted if a fade has occurred. Lastly, the first through seventh steps are repeated for at least one subsequent frame in the input video sequence.

REFERENCES:
patent: 5245436 (1993-09-01), Alatar
patent: 5500689 (1996-03-01), Lam
patent: 5748903 (1998-05-01), Agarwal
patent: 5771316 (1998-06-01), Uz
patent: 5854658 (1998-12-01), Uz

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