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1. 发明专利

CA2134369C DIGITAL TELEVISION SYSTEM 未知
公开(公告)号：CA2134369C
公开(公告)日：2004-09-21
申请号：CA2134369
申请日：1994-10-26
申请人： GOVE ROBERT J , MARSHALL STEPHEN W , MARKANDEY VISHAL , DOHERTY DONALD B , MEYER RICHARD C , HEIMBUCH SCOTT D
发明人： GOVE ROBERT J , MARSHALL STEPHEN W , MARKANDEY VISHAL , DOHERTY DONALD B , MEYER RICHARD C , HEIMBUCH SCOTT D
IPC分类号： H04N3/08 , H04N5/14 , H04N5/44 , H04N5/74 , H04N7/01 , H04N7/26 , H04N7/50 , H04N9/64 , H04N9/67 , H04N9/68 , H04N9/69 , H04N7/12
摘要： A digital television system (10) is provided. System (10) may receive a video signal at composite video interface and separation circuit (16). The video signal is separated into separate video signals by composite video interface and separation circuit (16). The separate video signals are converted to digital video signals in analog to digital converter circuit (18). Line slicer (14) divides each line of digital video signal into a plurality of channels such that each channel may be processed in parallel by channel signal processors (22a) through (22d). Each channel signal processor (22a) through (22d) may provide two lines of output for each line of video input. The processed digital video signals may be formatted for displays (26a) through (26c) in formatters (24a) through (24c).

2. 发明专利

CA2134371A1 SYSTEM AND METHOD FOR PACKING DATA INTO VIDEO PROCESSOR 未知
公开(公告)号：CA2134371A1
公开(公告)日：1995-05-05
申请号：CA2134371
申请日：1994-10-26
申请人： GOVE ROBERT J , DOHERTY DONALD B , MARSHALL STEPHEN W , DAVIS CARL W , EGAN JOSEPH G , MEYER RICHARD C , SAMPSELL JEFFREY B , HEIMBUCH SCOTT D
发明人： GOVE ROBERT J , DOHERTY DONALD B , MARSHALL STEPHEN W , DAVIS CARL W , EGAN JOSEPH G , MEYER RICHARD C , SAMPSELL JEFFREY B , HEIMBUCH SCOTT D
IPC分类号： H04N5/922 , H04N5/14 , H04N5/44 , H04N5/74 , H04N5/937 , H04N7/26 , H04N7/30 , H04N7/50 , H04N11/04 , H04N7/12
摘要： 19 SYSTEM AND METHOD FOR PACKING DATA INTO VIDEO PROCESSOR A system (30) for packing data into a video processor is provided. System (30) comprises demultiplexer (32), first and second first in-first out buffer memories (34) and (36), and multiplexer (38). Demultiplexer (32) divides a field of video data into first and second parts (42) and (44). First and second parts (42) and (44) are stored in first first in-first out buffer memories (34) and (36), respectively. multiplexer (38) combines one line from first first infirst out buffer memory (34) with one line from second first in-first out buffer memory (36) to form a single line for processing.

3. 发明专利

CA2134813C FILM-TO-VIDEO FORMAT DETECTION FOR DIGITAL TELEVISION 未知
公开(公告)号：CA2134813C
公开(公告)日：2004-05-25
申请号：CA2134813
申请日：1994-11-01
申请人： GOVE ROBERT J , MEYER RICHARD C , MARSHALL STEPHEN W
发明人： GOVE ROBERT J , MEYER RICHARD C , MARSHALL STEPHEN W
IPC分类号： H04N7/32 , H04N5/44 , H04N7/01 , H04N5/46
摘要： A film-to-video format detector (24) for a digital television receiver (10). The detector (24) receives pixel data from a current field and a second preceding field. It determines a set of pixel difference values, sums them to obtain a field difference value, and compares the field difference value to a threshold. These steps are repeated to obtain a series of field difference indicators. This series is analyzed to determine whether it has a pattern corresponding to a film-to-video format.

4. 发明专利

CA2178847C TRACKING FILTER 未知
公开(公告)号：CA2178847C
公开(公告)日：2006-05-23
申请号：CA2178847
申请日：1996-06-12
申请人： MARSHALL STEPHEN W
发明人： MARSHALL STEPHEN W
IPC分类号： H03F3/00 , H04N5/12 , G05B11/42 , H03H11/12 , H03H17/02
摘要： A tracking filter (10,80) which transitions from a type 2 loop to a type 1 loop as the loop error approaches 0 for fast settling and convergence without overshoot or ringing. The filter can either be implemented as an analog circuit (10) i n hardware or digitally (80) is software. A first integrator (30) or first accumulator (82) is utilized to increment or decrement a discriminator (22,96) output error value as long as the sign of its output (32) from the previous iteration is the same as a sign of the error signal provided to its input (26) by the error discriminator (22,96). The first integrator output is limited to a range by a limiter (42) between a minimum and maximum value. If the sign of the first integrator output is different from the sign of the input, the contents of the first integrator o r accumulator are dumped. The output from the first integrator or first accumulator has binary scaling (44,94) to scale its value before adding it t o a second integrator (50) or second accumulator (88).

5. 发明专利

CA2134369A1 DIGITAL TELEVISION SYSTEM 未知
公开(公告)号：CA2134369A1
公开(公告)日：1995-04-28
申请号：CA2134369
申请日：1994-10-26
申请人： GOVE ROBERT J , MARSHALL STEPHEN W , MARKANDEY VISHAL , DOHERTY DONALD B , MEYER RICHARD C , HEIMBUCH SCOTT D
发明人： GOVE ROBERT J , MARSHALL STEPHEN W , MARKANDEY VISHAL , DOHERTY DONALD B , MEYER RICHARD C , HEIMBUCH SCOTT D
IPC分类号： H04N3/08 , H04N5/14 , H04N5/44 , H04N5/74 , H04N7/01 , H04N7/26 , H04N7/50 , H04N9/64 , H04N9/67 , H04N9/68 , H04N9/69 , H04N7/12
摘要： 77 DIGITAL TELEVISION SYSTEM A digital television system (10) is provided. System (10) may receive a video signal at composite video interface and separation circuit (16). The video signal is separated into separate video signals by composite video interface and separation circuit (16). The separate video signals are converted to digital video signals in analog to digital converter circuit (18). Line slicer (14) divides each line of digital video signal into a plurality of channels such that each channel may be processed in parallel by channel signal processors (22a) through (22d). Each channel signal processor (22a) through (22d) may provide two lines of output for each line of video input. The processed digital video signals may be formatted for displays (26a) through (26c) in formatters (24a) through (24c).

6. 发明专利

CA2178847A1 TRACKING FILTER 未知
公开(公告)号：CA2178847A1
公开(公告)日：1996-12-14
申请号：CA2178847
申请日：1996-06-12
申请人： MARSHALL STEPHEN W
发明人： MARSHALL STEPHEN W
IPC分类号： H04N5/12 , G05B11/42 , H03H17/02 , H03F3/00 , H03H11/12
摘要： A tracking filter (10,80) which transitions from a type 2 loop to a type 1 loop as the loop error approaches 0 for fast settling and convergence without overshoot or ringing. The filter can either be implemented as an analog circuit (10) in hardware or digitally (80) in software. A first integrator (30) or first accumulator (82) is utilized to increment or decrement a discriminator (22,96) output error value as long as the sign of its output (32) from the previous iteration is the same as a sign of the error signal provided to its input (26) by the error discriminator (22,96). The first integrator output is limited to a range by a limiter (42) between a minimum and maximum value. If the sign of the first integrator output is different from the sign of the input, the contents of the first integrator or accumulator are dumped. The output from the first integrator or first accumulator has binary scaling (44,94) to scale its value before adding it to a second integrator (50) or second accumulator (88).

7. 发明专利

CA2128308A1 COLOR PHASE CONTROL FOR PROJECTION DISPLAY USING SPATIAL LIGHT MODULATOR 未知
公开(公告)号：CA2128308A1
公开(公告)日：1995-01-20
申请号：CA2128308
申请日：1994-07-18
申请人： DOHERTY DONALD B , MEYER RICHARD C , MARSHALL STEPHEN W , SAMPSELL JEFFREY B , GOVE ROBERT J
发明人： DOHERTY DONALD B , MEYER RICHARD C , MARSHALL STEPHEN W , SAMPSELL JEFFREY B , GOVE ROBERT J
IPC分类号： H04N9/31 , G09G3/02
摘要： 24 COLOR PHASE CONTROL FOR PROJECTION DISPLAY USING SPATIAL LIGHT MODULATOR A SLM-based projection display system (10) samples and processes video data for delivery to a spatial light modulator (SLM) (13o), and uses a color wheel (14a) to color the SLM-generated images. A frame memory (13b) provides data to the SLM (13c) and is managed so that, if the phase of the incoming video signal changes, a desired phase relationship between the color wheel position and the data available to the SLM (13c) can be maintained. Also a motor control unit (15a) uses a horizontal sync signal to generate a drive signal for the color wheel motor (16a), which limits the transient time during phase-changing events, and which provides a means for adjusting the phase of the drivesignal.

8. 发明专利

CA2134371C SYSTEM AND METHOD FOR PACKING DATA INTO VIDEO PROCESSOR 未知
公开(公告)号：CA2134371C
公开(公告)日：2004-06-15
申请号：CA2134371
申请日：1994-10-26
申请人： GOVE ROBERT J , DOHERTY DONALD B , MARSHALL STEPHEN W , DAVIS CARL W , EGAN JOSEPH G , MEYER RICHARD C , SAMPSELL JEFFREY B , HEIMBUCH SCOTT D
发明人： GOVE ROBERT J , DOHERTY DONALD B , MARSHALL STEPHEN W , DAVIS CARL W , EGAN JOSEPH G , MEYER RICHARD C , SAMPSELL JEFFREY B , HEIMBUCH SCOTT D
IPC分类号： H04N5/922 , H04N5/14 , H04N5/44 , H04N5/74 , H04N5/937 , H04N7/26 , H04N7/30 , H04N7/50 , H04N11/04 , H04N7/12
摘要： A system (30) for packing data into a video processor is provided. System (30) comprises demultiplexer (32), first and second first in-first out buffer memories (34) and (36), and multiplexes (38). Demultiplexer (32) divides a field of video data into first and second parts (42) and (44). First and second parts (42) and (44) are stared in first first in-first out buffer memories (34) and (36), respectively. Multiplexes (38) combines one line from first first in- first out buffer memory (34) with one line from second first in-first out buffer memory (36) to form a single line for processing.

9. 发明专利

CA2184128A1 COLOR DEMODULATION FOR DIGITAL TELEVISION 未知
公开(公告)号：CA2184128A1
公开(公告)日：1997-03-01
申请号：CA2184128
申请日：1996-08-26
申请人： MARSHALL STEPHEN W
发明人： MARSHALL STEPHEN W
IPC分类号： H04N9/66 , H04N9/30 , H04N9/64 , H04N9/78 , H04N7/01
摘要： A digital sampling and separation unit (12) for a television receiver (10) of a composite video signal, such as an NTSC signal, which has a color subcarrier. The video signal is sampled at a frequency selected in accordance with the invention. This frequency provides samples having a definite and repeating phase relationship with the subcarrier signal. (FIGURE 4). As a result, phase reference values can be used to convert the samples into correct color difference values.

10. 发明专利

CA2179440A1 SPATIAL LIGHT MODULATOR WITH IMPROVED PEAK WHITE PERFORMANCE 未知
公开(公告)号：CA2179440A1
公开(公告)日：1996-12-30
申请号：CA2179440
申请日：1996-06-19
申请人： MARSHALL STEPHEN W
发明人： MARSHALL STEPHEN W
IPC分类号： G02F1/01 , G09G1/00 , H04N5/74 , H04N9/30 , G09G3/02 , G02B27/00
摘要： A spatial light modulator based imaging system (30) with improved peak white performance characteristics. The apparent dynamic range of the spatial light modulator (74) is increased by adding light to pixels neighboring a saturated pixel. An apparent bloom effect is created with the pixels neighboring the saturated pixel appearing brighter, to give sunlight reflecting from the surface of a lake, for instance, more sparkle or highlights. Charts or equations are utilized to determine the degree to which pixel brightness is increased for neighboring pixels. The closer a pixel to a saturated pixel, and the greater the saturation of a particular pixel, the greater increase in brightness for neighboring pixels.

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