公开(公告)号：CA2218152A1

公开(公告)日：1998-05-01

申请号：CA2218152

申请日：1997-10-14

Applicant: IBM

Inventor： FEIG EPHRAIM ,  ZHANG LIANG JIE ,  CHEN JEANE

IPC: G06F3/14 ,  G06F3/048 ,  G06F17/30

Abstract: The invention provides a method for indicating the location of time dependen t video hot links to a user, includes: displaying on a first portion of a display device a motion video presentation which includes a hot link region which is dynamically displayed for selection by a user to link to different content; and, displaying an indication of the presence of the hot link region in the video presentation in a non-intrusive manner on a second portion of the display device. A second portion includes vertical and horizontal indicators adjacent the first portion of the display device for cooperatively indicating a location and size of one or more hot link regions present in the video presentation.

公开(公告)号：CA2094523A1

公开(公告)日：1994-01-31

申请号：CA2094523

申请日：1993-04-21

Applicant: IBM

Inventor： FEIG EPHRAIM ,  LINZER ELLIOT M

IPC: G09G5/04 ,  G06T1/00 ,  H04N9/67 ,  H04N9/804 ,  H04N11/04 ,  H04N11/20 ,  G06F15/66 ,  G06F5/00

Abstract: The present invention improves either the processing speed or circuit complexity (or both) of a digital image processor by eliminating the conventional multiplication operation from the RGB to YUV and YUV to RGB transforms having NTSC compatible equation coefficients. In particular, the change of color-basis matrix for converting RGB data to obtain YUV data is factored into a scale factor and a coefficient matrix. The coefficient matrix contains coefficients such that its product with the RGB input vector can be performed using only seven binary additions and five shift operations. This process effectively removes the conventional multiplication operations from the RGB to YUV conversion. The scale factor is conveniently absorbed into the quantization of the YUV data before transmission. The quantization process includes a multiplication already and the two multiplication steps are folded into one step. Therefore, the absorption of the scale factor into the quantization step does not increase the processing time because no multiplication steps are added. This process of factoring the transform matrix is also applied to the inverse transform process. In the inverse transform process the change of color-basis matrix for converting YUV data to RGB data is such that its implementation reduced to five addition steps and two shift steps, again effectively eliminating the conventional multiplication operations. Also, the diagonal matrix is absorbed into the descaling process so that no multiplication steps are added to the inverse transform process.