Dung V Truong

US Patent:

6839094, Jan 4, 2005

Filed:

Dec 14, 2000

Appl. No.:

09/738281

Inventors:

Che Wing Tang - Baldwin Park CA, US
Dung Duc Truong - El Monte CA, US

Assignee:

RGB Systems, Inc. - Anaheim CA

International Classification:

H04N 508
H04N 514
H04N 546
H04N 701
H04N 1120

US Classification:

348607, 348441, 348448, 348452, 348458, 348558, 348700

Abstract:

A method and apparatus for detecting and correcting motion artifacts in interlaced video signal converted for progressive video display. A correction is applied where interlaced video material is determined to originate from film source, thereby having been converted to video using a process known as 3-2 pulldown. Where the video material is not a result of the 3-2 pulldown process, a check is made for the presence of “pixel motion” so that corrections may be applied to smooth out the pixel motion. To determine 3-2 pulldown or field motion, a video field is compared to the field prior to the previous field to generate field error. Field errors are generated for five consecutive fields and a local minimum error repeated every five fields indicate the origination of the video material from film source using the 3-2 pulldown process. Upon confirmation of 3-2 pulldown, the video material is modified to correct for the mixing of two film frames into one interlaced video frame by assuring that the two fields of the de-interlaced video frame contain data from the same film frame. Where the video material did not originate from a film source, but pixel motion is detected, the pixel motion is smoothed out by an averaging method.

US Patent:

7738037, Jun 15, 2010

Filed:

Oct 29, 2004

Appl. No.:

10/976669

Inventors:

Che Wing Tang - Baldwin Park CA, US
Dung Duc Truong - El Monte CA, US

Assignee:

RGB Systems, Inc. - Anaheim CA

International Classification:

H04N 5/08
H04N 5/14
H04N 7/01
H04N 11/20

US Classification:

348441, 348607, 348448, 348452, 348458, 348700, 348 96

Abstract:

A method and apparatus for detecting and correcting motion artifacts in interlaced video signal converted for progressive video display. A correction is applied where interlaced video material is determined to originate from film source, thereby having been converted to video using a process known as 3-2 pulldown. Where the video material is not a result of the 3-2 pulldown process, a check is made for the presence of “pixel motion” so that corrections may be applied to smooth out the pixel motion. To determine 3-2 pulldown or field motion, a video field is compared to the field prior to the previous field to generate field error. Field errors are generated for five consecutive fields and a local minimum error repeated every five fields indicate the origination of the video material from film source using the 3-2 pulldown process. Upon confirmation of 3-2 pulldown, the video material is modified to correct for the mixing of two film frames into one interlaced video frame by assuring that the two fields of the de-interlaced video frame contain data from the same film frame. Where the video material did not originate from a film source, but pixel motion is detected, the pixel motion is smoothed out by an averaging method.