公开(公告)号：DE69605018D1

公开(公告)日：1999-12-09

申请号：DE69605018

申请日：1996-02-13

Applicant: ST MICROELECTRONICS SRL

Inventor： MARQUES PEREIRA RICARDO ALBERT ,  MANCUSO MASSIMO ,  POLUZZI RINALDO

IPC: H04N5/208 ,  G06T5/20 ,  G06T7/60 ,  H03H17/00 ,  H04N5/44 ,  H04N7/01

Abstract: An interpolation filter for video signals comprises: first circuit means (R1-R3,L1-L3,C,7-9) supplied by discrete image elements (p1-p10) for detecting an image edge; second circuit means (10) supplied by the first circuit means for generating a first signal (DDA) corresponding to an average of the discrete image elements (p1-p10) along a direction of the image edge; third circuit means (11,12,13) supplied by the first circuit means for detecting a texture image area wherein an image edge cannot be univocally determined and for generating a second signal (K) depending on a degree of existance of the image edge; fourth circuit means (14), supplied by the first signal (DDA), the second signal (K) and a third signal (Mout), for generating an output signal (SWout) obtained by combining the first signal (DDA) with the third signal (Mout) in a proportion determined by the second signal (K), and multiplexing means (15) controlled by a control signal (CNT) for selectively coupling the third signal (Mout) to fourth signal (A), corresponding to an average of the discrete image elements (p1-p10) along a prescribed direction, or to a fifth signal (PF) corresponding to a previously received image element value.

公开(公告)号：DE69605018T2

公开(公告)日：2000-06-08

申请号：DE69605018

申请日：1996-02-13

Applicant: ST MICROELECTRONICS SRL

Inventor： MARQUES PEREIRA RICARDO ALBERT ,  MANCUSO MASSIMO ,  POLUZZI RINALDO

IPC: H04N5/208 ,  G06T5/20 ,  G06T7/60 ,  H03H17/00 ,  H04N5/44 ,  H04N7/01

Abstract: An interpolation filter for video signals comprises: first circuit means (R1-R3,L1-L3,C,7-9) supplied by discrete image elements (p1-p10) for detecting an image edge; second circuit means (10) supplied by the first circuit means for generating a first signal (DDA) corresponding to an average of the discrete image elements (p1-p10) along a direction of the image edge; third circuit means (11,12,13) supplied by the first circuit means for detecting a texture image area wherein an image edge cannot be univocally determined and for generating a second signal (K) depending on a degree of existance of the image edge; fourth circuit means (14), supplied by the first signal (DDA), the second signal (K) and a third signal (Mout), for generating an output signal (SWout) obtained by combining the first signal (DDA) with the third signal (Mout) in a proportion determined by the second signal (K), and multiplexing means (15) controlled by a control signal (CNT) for selectively coupling the third signal (Mout) to fourth signal (A), corresponding to an average of the discrete image elements (p1-p10) along a prescribed direction, or to a fifth signal (PF) corresponding to a previously received image element value.