JP2010087720A - Device and method for signal processing that converts display scanning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method for signal processing that converts display scanning methods. <P>SOLUTION: The signal processing device 1 processes field switching type stereoscopic video signals to provide stereoscopic video display to a progressive-type plane image display device. The signal processing device 1 has a signal conversion means 3 for inputting right eye and left eye stereoscopic video signals which are repeated for each field in the field switching method, inserting pseudo signals with a specified signal value between scanning lines of stereoscopic video signals in the field, and making control so as to generate progressive-type video signals. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a signal processing apparatus and method for converting a scanning method for display, and more particularly to a signal processing apparatus and method for clearly displaying a field switching type stereoscopic image on a progressive type flat image display device.

  In recent years, not only 3D theater systems and projectors, but also general homes, there is a growing need for viewing stereoscopic images using general-purpose display devices (home display devices).

  In particular, a field switching type (also referred to as field switching type) stereoscopic image display apparatus is a vacuum tube type display apparatus (hereinafter referred to as a CRT display apparatus) that has been an interlaced scanning type (hereinafter also referred to as an interlaced type). It has been widely adopted as a simpler three-dimensional image display device by utilizing the afterimage effect. In recent years, CRT display devices have been replaced by so-called flat image display devices such as plasma display devices and liquid crystal display devices. In addition, stereoscopic display using this CRT display device has a disadvantage that flickering is likely to occur, and is not frequently applied.

  Further, a polarizing filter for the left eye and right eye is applied to the display surface of the flat image display device, which is different for each scanning line or a set of horizontally arranged pixels corresponding to the scanning line (that is, the scanning line). A stereo vision system is also known that is configured to show parallax images to the right and left eyes through polarized glasses with different polarization characteristics on the left and right according to the polarization of the scanning line of this flat image display device. It has been. Due to the appearance of such a stereoscopic video display device and the progressive display control unique to this flat image display device, the frequency of application of stereoscopic display using a CRT display device has further decreased due to its clarity. ing.

  However, field switching type stereoscopic video images used for CRT display devices have been used for a long time because they are easy to produce, and there are many video contents. On the other hand, viewing on a flat image display device using polarized glasses by a progressive scanning method (hereinafter referred to as a progressive method) has been expected.

  On the other hand, when displaying stereoscopic images using polarized glasses, left-eye and right-eye images captured using the interlace method are used for the right eye corresponding to even and odd fields using interlace signal transmission means or recording devices. As a video for the left eye and a left video, a plane image display device that alternately inserts and switches a frame image is configured, and polarized light having different polarization characteristics on the left and right according to the polarization of the scanning line of the plane image display device 2. Description of the Related Art A progressive type flat image display device that provides images with parallax to the right eye and the left eye through glasses is known (for example, see Patent Document 1).

JP 2006-254074 A

  However, in the stereoscopic image display technique of Patent Document 1, since one frame image for the left eye and one for the right eye are alternately displayed in even field and odd field frames, when applied to a progressive flat image display device, There is a situation in which there is no video signal in the odd-numbered field area for the left-eye video for the even-field frame video, and similarly, the right-eye video for the odd-field frame video in the even-numbered field area. There will be no situation. As a result, the viewer's eyes flicker, resulting in a 3D image with a sense of incongruity, or viewer's viewing fatigue.

  For example, FIG. 1 shows a block diagram of a stereoscopic video display system configured based on the prior art. Such a stereoscopic video display system 101 based on the prior art includes a field switching switching device 105, a shutter glasses driving circuit 106 that functions as a stereoscopic video display device, and an interlaced CRT display 107. The field switching switching device 105 generates a signal for generating an interleave signal composed of right-eye and left-eye field signals corresponding to even and odd fields (this signal is particularly referred to as a field switching switching signal). A switch 104 that functions as a means and can select an interleave signal of the known stereoscopic camera apparatus 102 or the reproduction apparatus 103 can be provided.

  The stereoscopic camera device 102 switches the field signal from the camera 121R that generates the field signal for the right eye and the camera 121L that generates the field signal for the left eye, and the field signals from the cameras 121R and 121L, and is known as an interleave signal. And a field switching device 122 for sending a switching signal. The playback apparatus 103 includes a recording device 113 that inputs and records a field switching switching signal from such a field switching device 122 (or from outside), and plays back and outputs the field switching switching signal from the recording device 113. You can also.

  A conventional stereoscopic video display system 101 shown in FIG. 1 inputs a field switching switching signal composed of field signals for right eye and left eye to a CRT display 107, and the CRT display 107 is for right eye and left eye. RGB digital video signals are displayed according to the interleave method. On the other hand, the shutter glasses driving circuit 106 inputs a field switching switching signal in order to synchronize with the image of the CRT display 107, and controls the switching of transmission and shielding for the right eye and the left eye of the shutter glasses 108. A control signal is sent to the shutter glasses 108.

  For example, as shown in FIG. 2, a stereoscopic image display system 101 configured based on such a conventional technique includes a left-eye frame image 101 (an odd-field frame image 101O and an even-field frame image 101E) and a right-hand image. For the eye frame image 102 (odd field frame image 102O and even field frame image 102E), for example, the frame image 101O and frame image 102E are discarded, and the left eye even field frame image 101E. In addition, the odd-field frame image 102O for the right eye is alternately switched to display an image with parallax between the right eye and the left eye on the CRT display 107.

For example, as shown in FIG. 3A, the field switching switching signal input to the CRT display 107 is an interlace method in which one frame of video is alternately repeated in an odd field for the left eye and an even field for the right eye. Usually, N is a natural number of 1 or more, and an odd field (for example, stereoscopic video signal scanning lines L _{O1 to} L _ON ) and an even field (for example, for stereoscopic video signal) in one frame period, respectively. Scanning lines R _{E1 to} R _EN ). When such a field switching switching signal is realized on the CRT display 107, it is projected to the viewer of the flat image display device by switching between transmission and shielding for the right eye and the left eye of the shutter glasses 108. As shown in FIG. 3B, the video signal includes an odd field (for example, stereoscopic video signal scanning lines L _{O1 to} L _ON ) and a black signal, and a black signal and an even field (for example, stereoscopic video signal scanning lines). R _{E1 to} R _EN ) (see FIG. 4).

Therefore, when a stereoscopic video display is realized using such a field switching switching signal in a flat video display device such as a liquid crystal display instead of the CRT display 107, the odd field (or even number) is simply converted to the progressive system. Fields of video signal scanning lines (for example, stereoscopic video signal scanning lines L _{O1 to} L _ON ) are displayed as no signals.

  Therefore, even when the stereoscopic video display system 101 configured based on such a conventional technique is applied to a flat video display device, for example, for even-frame frame video, there is no scanning line between video video scanning lines. (The field portion where there is no video signal becomes a black signal), and the viewer's eyes become a stereoscopic video with a sense of incongruity as flicker, or causes viewer fatigue.

  An object of the present invention is a display scanning method for reducing a viewer's viewing fatigue, which is a stereoscopic image in which a sense of incongruity is reduced as flickering to the viewer's eyes while using a progressive-type flat image display device Is to provide a signal processing apparatus and method for converting the signal.

  A signal processing apparatus according to a first aspect of the present invention is a signal processing apparatus for processing a field-switching stereoscopic video signal to provide a stereoscopic video display to a progressive-type planar video display apparatus. The right-eye and left-eye stereoscopic video signals repeated for each field are input, and for a stereoscopic video signal of a certain field, a pseudo signal having a constant signal value between the scanning lines of the stereoscopic video signal of the field And a signal conversion means for controlling to generate a progressive video signal.

  In the signal processing device according to the first aspect of the present invention, the pseudo signal has a constant signal value excluding a predetermined zero level.

  In the signal processing device according to the first aspect of the present invention, the signal conversion unit extracts at least part of the video signal of the scanning line of the stereoscopic video signal of the field from the stereoscopic video signal of the field. A partial signal extracting unit, and a pseudo signal generating unit that generates the at least a part of the video signal as a pseudo signal having the predetermined signal value.

  In the signal processing apparatus according to the first aspect of the present invention, the at least part of the video signal is composed of a signal value of a leading video signal of a stereoscopic video signal scanning line in a certain field.

  Further, in the signal processing device according to the first aspect of the present invention, the at least part of the video signal is an average value from a leading video signal of a stereoscopic video signal scanning line of a certain field to a video signal for a predetermined time. It is characterized by comprising.

  In the signal processing apparatus according to the first aspect of the present invention, the at least part of the video signal is composed of an average value of the whole of the stereoscopic video signal scanning lines in a certain field.

  In the signal processing apparatus according to the second aspect of the present invention, the signal converting means may be configured to detect a signal of a stereoscopic video signal scanning line of the stereoscopic video signal for a certain field in the input field switching stereoscopic video signal. Storage means for storing one scanning line segment, partial signal extraction means for extracting at least a part of the video signal from the stored video signal for one scanning line, and a signal based on the at least part of the video signal And pseudo signal generating means for generating a value as a pseudo signal of the constant signal value.

  In the signal processing device according to the third aspect of the present invention, the signal conversion means may be configured to detect a signal of a stereoscopic video signal scanning line of the stereoscopic video signal for a certain field in the input field switching stereoscopic video signal. Based on the at least part of the video signal, storage means for storing two scanning lines, partial signal extraction means for extracting at least part of the video signals from the stored video signals of the two scanning lines, And pseudo signal generating means for generating a signal value as a pseudo signal of the constant signal value.

  In the signal processing device according to the fourth aspect of the present invention, the signal conversion means stores, for a certain field in the input field switching type stereoscopic video signal, one field of the stereoscopic video signal. And pseudo signal generating means for generating an average value based on the stored video signal for one field as the pseudo signal having the constant signal value.

  Also, the signal processing method of the present invention processes a field switching type stereoscopic video signal to provide a stereoscopic video display to a progressive type planar video display device by the signal processing apparatus of the first aspect of the present invention. A signal processing method for inputting a right-eye and left-eye stereoscopic video signal repeated for each field of a field switching method and displaying a stereoscopic video signal of a certain field; Inserting a pseudo signal having a constant signal value between the scanning lines of the video signal.

  According to the present invention, it is possible to display a clear stereoscopic video with little flickering from a field switching type stereoscopic video signal on a progressive type planar video display device.

  First, the signal processing apparatus according to the first embodiment of the present invention will be described.

Example 1
The signal processing apparatus 1 according to the first embodiment of the present invention receives the field switching switching signal of the field switching method described above, performs signal processing to generate a progressive signal, and uses the progressive signal as a progressive method plane such as a liquid crystal display. This is a device for supplying the video display device 7 to display a stereoscopic video with parallax in the right eye and the left eye. The viewer can view stereoscopic images with parallax in the right eye and the left eye through polarized glasses that have different polarization characteristics on the left and right and do not require external control.

FIG. 5 shows a block diagram of a stereoscopic video display system including the signal processing device 1 according to the first embodiment of the present invention. The signal processing device 1 according to the first embodiment receives the field switching switching signal of the field switching method described above, extracts the field signal for the right eye and the field for the left eye, and transmits the field signal for the left eye 2L. And a progressive method for inputting the output signals from the field signal processing circuit 2R for the right eye, the field signal processing circuit 2L for the left eye, and the field signal processing circuit 2R for the right eye and supplying them to the flat image display device 7. A signal conversion circuit 3 that generates a video signal _ORL and supplies the video signal _ORL to the flat video display device 7;

The signal conversion circuit 3 includes a pseudo signal generating unit 31 that generates a pseudo signal having a constant signal value (for example, luminance value), and field switching from the left eye field signal processing circuit 2L and the right eye field signal processing circuit 2R. The right-eye and left-eye field signals I _R and I _L that are repeated for each field extracted from the switching signal are respectively input, and the stereoscopic video signal scanning line of the field for the stereoscopic video signal of a certain field is input. Field selection means for controlling to generate a progressive video signal _ORL by inserting a pseudo signal D having a constant signal value (excluding the black level) between (which will be referred to as a stereoscopic video signal scanning line). 32.

The signal processing apparatus 1 according to the first embodiment inputs a field switching switching signal similar to the conventional one as shown in FIG. 6 (a), for example. That is, the input field switching signal is an interlaced signal that repeats alternately in the odd-numbered field for the left eye and the even-numbered field for the right eye. Typically, N is a natural number of 1 or more and is one frame period. Each of the left-eye odd-field stereoscopic video signals (for example, stereoscopic video signal scanning lines L _{O1 to} L _ON ) and even-field stereoscopic video signals (for example, stereoscopic video signal scanning lines R _{E1 to} R _EN ). . Furthermore, as shown in FIG. 6B, for example, the signal conversion circuit 3 according to the first embodiment has a certain field in each of the right-eye and left-eye field signals I _R and I _L that is repeated for each field. 3D video signal, a pseudo signal D having a constant signal value is applied to a scanning line between stereoscopic video signal scanning lines (for example, stereoscopic video signal scanning lines L _{O1 to} L _ON or R _{E1 to} R _EN ). , And control to generate a progressive video signal _ORL .

  For example, the pseudo signal D having a constant signal value, which will be described in detail later, is a gray video signal having a constant signal value excluding a predetermined zero level, or one of the 3D video signal scanning lines. A video signal determined based on the extracted at least part of the signal before the scanning line (for example, the signal value of the video signal at the head of the scanning line of the stereoscopic video signal when displaying the stereoscopic video signal, or The average signal from the top video signal of the stereoscopic video signal scanning line in the field to the video signal for a predetermined time, or the entire average signal of the stereoscopic video signal scanning line in a certain field). be able to. Alternatively, the pseudo signal D having a constant signal value can be an average value extracted based on a stereoscopic video signal for two scanning lines of the stereoscopic video signal scanning line. Furthermore, the pseudo signal D having a constant signal value can be an average value extracted based on the stereoscopic video signal for one field immediately before the display field. The average value referred to here includes the average value of the whole of at least a part of the extracted stereoscopic video signal, the square average value, or the average value of the values obtained by sampling the stereoscopic video signal for one scanning line at a predetermined interval. .

  Therefore, as described above, a viewer who views a stereoscopic video based on a field switching switching signal using the conventional CRT display 107 has a video signal and a black signal to switch for each field as shown in FIG. The repeated video is viewed with each eye. On the other hand, as shown in FIG. 7B, a viewer who views the progressive-type flat image display device 7 via the signal processing device 1 according to the first embodiment is provided with an external light having different left and right polarization characteristics. A stereoscopic image with parallax in the right eye and the left eye into which the pseudo signal D is inserted is viewed through polarized glasses that do not require control.

  For example, as illustrated in FIG. 8, the signal processing apparatus 1 according to the first embodiment includes a left-eye frame image 101 (odd field frame image 101O and even field frame image 101E) transmitted by the stereoscopic imaging camera 2. For the left eye frame image 102 (odd field frame image 102O and even field frame image 102E), for example, the frame image 101O and the frame image 102E are discarded, so that a constant signal value for the left eye is obtained. A progressive signal by alternately switching a pseudo-signal 103a and a video signal 105 composed of an even-numbered frame image 101E and a pseudo-signal 104a having a constant signal value for the right eye and a video signal 106 composed of an odd-numbered frame image 102O. To the flat image display device 7.

  According to the signal processing apparatus 1 of the first embodiment, it is possible to display a clear stereoscopic video with little flicker from a field switching stereoscopic video signal on a progressive planar video display device.

  Next, a signal processing apparatus according to a second embodiment of the present invention will be described.

(Example 2)
The signal processing apparatus 1 according to the second embodiment of the present invention has the same components as those of the first embodiment and functions in the same manner. As shown in FIG. 9, the signal conversion circuit 3 in the signal processing apparatus 1 according to the second embodiment includes a pseudo signal generation circuit 31 for generating a pseudo signal D having a constant signal value excluding the black level, and for each field. Switches 32L and 32R for switching a stereoscopic video signal and a pseudo signal in units of scanning lines (lines) and outputting a combined signal for each field; a switch 32RL for switching and outputting a combined signal for each field in units of fields; A pseudo signal generation circuit 31 and a timing control circuit 32CL that generates a timing control signal for adjusting and controlling the synchronization timing of the switches 32L, 32R, and 32RL are provided. The signal conversion circuit 3 according to the second embodiment is a more specific example of the signal conversion circuit 3 according to the first embodiment. As in the first embodiment, the right-eye and left-eye field signals I _R and I _L that are repeated for each field are input, and the stereoscopic video signal of the field is obtained for the stereoscopic video signal of a certain field. A pseudo signal D having a constant signal value is inserted into the scanning line between the scanning lines (for example, the stereoscopic video signal scanning lines L _{O1 to} L _ON or R _{E1 to} R _EN ) to generate a progressive video signal _ORL . To do. In addition, the same reference number is attached | subjected to the component similar to the Example mentioned above, and description of the same component is abbreviate | omitted.

  As shown in FIG. 10, the pseudo signal generation circuit 31 in the signal processing apparatus 1 according to the second embodiment shows a specific example of outputting a gray video signal having a predetermined signal value. The pseudo signal generation circuit 31 according to the third embodiment includes a white video signal generation circuit 311, a distribution circuit 312, and a black video signal generation circuit 313. The white video signal generation circuit 311 is a circuit that generates a white video signal of a white level corresponding to the maximum value of the video signal. The black video signal generation circuit 313 is a circuit that generates a black video signal of a black level corresponding to the minimum value of the video signal. The distribution circuit 312 transmits the mixed signal from the white video signal generation circuit 311 and the black video signal generation circuit 313 as a pseudo signal D at a predetermined distribution ratio.

  According to the signal processing device 1 of the second embodiment, it is possible to display a clear stereoscopic video with little flicker from a field switching stereoscopic video signal on a progressive planar video display device.

  Next, a signal processing apparatus according to a third embodiment of the present invention will be described.

(Example 3)
The signal processing apparatus 1 according to the third embodiment of the present invention has the same components as those of the first embodiment and functions in the same manner. The signal processing apparatus 1 according to the third embodiment shows a specific example in which the pseudo signal D is a video signal that is determined based on a part of the signal before one scanning line. As shown in FIG. 11, the signal conversion circuit 3 in the signal processing apparatus 1 according to the third embodiment generates a pseudo signal D having a constant signal value excluding the black level. The sample hold circuits 321 and 322 for each field to be sampled and held, the pseudo signal selection switch 32SH for selecting the output of the sample hold circuits 321 and 322 for each field, and the stereoscopic video signal and the pseudo signal for each field are scanned. Switches 32L and 32R for outputting a combined signal for each field by switching in line units, switches 32RL for switching and outputting a combined signal for each field, sample hold circuits 321 and 322, and switches Timing for adjusting and controlling the synchronization timing of 32SH, 32L, 32R, and 32RL And a timing control circuit 32CL for generating a control signal. In addition, the same reference number is attached | subjected to the component similar to the Example mentioned above, and description of the same component is abbreviate | omitted.

The signal conversion circuit 3 according to the third embodiment is a more specific example of the signal conversion circuit 3 according to the first embodiment. As in the first embodiment, the right-eye and left-eye field signals I _R and I _L that are repeated for each field are input, and the stereoscopic video signal of the field is obtained for the stereoscopic video signal of a certain field. A pseudo signal D having a constant signal value is inserted into a scanning line between the scanning lines (for example, L _{O1 to} L _ON or R _{E1 to} R _EN ) to generate a progressive video signal _ORL .

That is, the signal conversion circuit 3 extracts, for the stereoscopic video signal of a certain field, a partial signal extraction unit that extracts at least a partial video signal of the scanning line of the stereoscopic video signal of the field; And a pseudo signal generating means for generating a signal as a pseudo signal having a constant signal value. The constant signal value (black level is set to the scanning line between the stereoscopic video signal scanning lines of each field. Except for the pseudo signal D), a progressive video signal _ORL is generated.

  For example, at least a part of the video signal as the pseudo signal D can be composed of the signal value of the head video signal of the stereoscopic video signal scanning line of a certain field.

  Alternatively, at least a part of the video signal as the pseudo signal D can be composed of an average value from the top video signal of the stereoscopic video signal scanning line in a certain field to the video signal for a predetermined time.

  Alternatively, at least a part of the video signal as the pseudo signal D can be obtained by sampling and holding the entire stereoscopic video signal scanning line in a certain field.

  According to the signal processing apparatus 1 of the third embodiment, it is possible to display a clear stereoscopic video with little flicker from a field switching stereoscopic video signal on the progressive planar video display device.

  Next, a signal processing apparatus according to a fourth embodiment of the present invention will be described.

Example 4
The signal processing apparatus 1 according to the fourth embodiment of the present invention has the same components as those of the first embodiment and functions similarly. The signal processing apparatus 1 according to the fourth embodiment converts the pseudo signal D into a video signal (average, mean square, maximum value of each field) in consideration of one scanning line of a signal one scanning line before the stereoscopic video signal scanning line. Or a video signal (average, square average, average of the maximum value of each field, etc.) considering the signal before one scanning line and the signal after one scanning line. Show.

  As shown in FIG. 12, the signal conversion circuit 3 in the signal processing apparatus 1 according to the fourth embodiment stores line memories 351 and 352 that can store a video signal for each scanning line in each field and delay it by one line. In order to generate a pseudo signal D having a constant signal value excluding the black level, an average process is performed on the video signal in consideration of the signal before the scanning line of the stereoscopic video signal scanning line, the signal after the scanning line, or both. The average value acquisition circuits 361 and 362 for each field (average, square average, average of the maximum value of each field, etc.), the outputs from the line memories 351 and 352, and the outputs of the average value acquisition circuits 361 and 362 are used. Switches 32L2 and 32R2 that output the combined signal for each field by switching in units of scanning lines (lines), and the switches that output the combined signal for each field by switching in units of fields. Comprises a pitch 32RL, line memories 351 and 352, the average value obtaining circuit 361, and a timing control circuit 32CL for generating a timing control signal for adjusting and controlling the synchronization timing of the switch 32L2,32R2,32RL. In addition, the same reference number is attached | subjected to the component similar to the Example mentioned above, and description of the same component is abbreviate | omitted.

  The signal processing apparatus 1 according to the fourth embodiment of the present invention obtains the same effect as that of the first embodiment, but in particular, as the pseudo signal D, one scan line worth of the signal one scan line before the three-dimensional video signal scan line. In addition to using a video signal, for example, a plurality of line memories are prepared, and the pseudo signal D having a constant signal value is calculated based on an average value extracted based on a stereoscopic video signal for two scanning lines of a stereoscopic video signal scanning line. can do. In this case, a video signal (average, mean square, maximum of each field) that considers the video signal for one scanning line of the signal before one scanning line and the signal after one scanning line of the stereoscopic video signal scanning line. Value average) can be generated as a pseudo signal.

That is, the signal conversion circuit 3 performs an average process on the line memories 351 and 352 for storing the stereoscopic video signal one scanning line before the scanning line for the stereoscopic video signal in a certain field and the stereoscopic video signal before the scanning line. Average value acquisition circuits 361 and 362, and generates a signal subjected to the average processing as a pseudo signal, and outputs a fixed signal value (black level to the scanning line between the scanning lines of the stereoscopic video signal of each field. Except for the pseudo signal D), a progressive video signal _ORL is generated.

  According to the signal processing device 1 of the fourth embodiment, it is possible to more effectively display a clear stereoscopic video with little flicker from a field switching stereoscopic video signal on a progressive flat video display.

  Next, a signal processing apparatus according to a fifth embodiment of the present invention will be described.

(Example 5)
The signal processing device 1 according to the fifth embodiment of the present invention has the same components as those of the first embodiment and functions in the same manner. The signal processing apparatus 1 according to the fifth embodiment specifically uses the pseudo signal D as a signal (average, square average, average of maximum values of each field, etc.) in consideration of the entire signal of the field immediately before the display field. An example is shown.

  As shown in FIG. 13, the signal conversion circuit 3 in the signal processing apparatus 1 according to the fifth embodiment excludes the field memories 331 and 332 that can store the video signal of each field and delay it by one field, and the black level. In order to generate a pseudo signal D having a constant signal value, an average value acquisition circuit 341 for each field that performs average processing (average, square average, average of maximum values of each field, etc.) for one field of video signal 342, switches 32L and 32R for switching the outputs from the field memories 331 and 332 and the outputs of the average value acquisition circuits 341 and 342 in units of scanning lines (lines), and outputting a composite signal for each field, and for each field A switch 32RL for switching and outputting the combined signal of each field, field memories 331 and 332, and an average value acquisition circuit 341 342, and a switch 32L, 32R, and a timing control circuit 32CL for generating a timing control signal for adjusting and controlling the synchronization timing 32RL. In addition, the same reference number is attached | subjected to the component similar to the Example mentioned above, and description of the same component is abbreviate | omitted.

  The signal processing apparatus 1 according to the fifth embodiment of the present invention obtains the same effect as that of the first embodiment. In particular, the pseudo signal D is generated as a pseudo signal that is obtained by averaging video signals for one field.

That is, the signal conversion circuit 3 obtains an average value by performing an averaging process on the stereoscopic video signal of one field before the field memories 331 and 332 for storing the stereoscopic video signal for one field immediately before the stereoscopic video signal of a certain field. Circuits 341 and 342, which generate an average-processed signal as a pseudo signal D, and have a constant signal value (excluding the black level) on the scanning lines between the stereoscopic video signal scanning lines of each field. The pseudo signal D is inserted to generate a progressive video signal _ORL .

  According to the signal processing device 1 of the fifth embodiment, it is possible to more effectively display a clear stereoscopic video with little flickering from a field switching type stereoscopic video signal on a progressive type planar video display device.

  Even with this configuration, according to the signal processing device 1 of the fifth embodiment, clear stereoscopic video with less flickering from the field switching stereoscopic video signal is more effectively displayed on the progressive planar video display device. Will be able to.

  As described in the above-described embodiment, when displaying stereoscopic images using the polarized glasses method, interlaced field switching stereoscopic images are displayed in odd (even) fields for the left eye and even (odd) fields for the right eye. At the time when the interlace signal is converted to the progressive signal, the image for flicker suppression is inserted into the odd-numbered scan line for the left eye and the even-numbered (odd) scan line for the right eye. It becomes possible to display on a display screen of a video display device or the like without losing clarity.

  Although the present invention has been described as a representative example in the above-described embodiments, it will be apparent to those skilled in the art that many changes and substitutions can be made within the spirit and scope of the present invention. For example, the present invention can be characterized as a signal processing method, and can also be characterized as a program for executing or realizing each means and function in a computer configured as a signal processing apparatus. Furthermore, a signal processing device of another aspect can be realized by combining the signal processing devices of the respective embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the claims.

  Currently, CRT display devices have disappeared from the market, while flat image display devices and the like have monopolized the market instead. Among them, 3D flat image display devices that are usually used are 3D flat image display devices in which right-eye and left-eye polarization filters are attached to each scanning line using a flat image display device. According to the present invention, it is possible to reuse the conventional content with such a 3D flat image display device, and it is useful for industries that require simple stereoscopic video.

It is a block diagram of a three-dimensional video display system provided with the signal processing apparatus comprised based on a prior art. It is a figure which shows operation | movement of a three-dimensional video display system provided with the signal processing apparatus comprised based on a prior art. It is a figure which shows operation | movement of a three-dimensional video display system provided with the signal processing apparatus comprised based on a prior art. It is a figure which shows operation | movement of a three-dimensional video display system provided with the signal processing apparatus comprised based on a prior art. 1 is a block diagram of a stereoscopic video display system including a signal processing device 1 according to a first embodiment of the present invention. It is a figure which shows operation | movement of a stereo image display system provided with the signal processing apparatus 1 of Example 1 by this invention. It is a figure which shows operation | movement of a stereo image display system provided with the signal processing apparatus 1 of Example 1 by this invention. It is a figure which shows operation | movement of a stereo image display system provided with the signal processing apparatus 1 of Example 1 by this invention. 1 is a block diagram of a signal conversion circuit in a signal processing device 1 according to a first embodiment of the present invention. It is a block diagram of the signal conversion circuit in the signal processing apparatus 1 of Example 2 by this invention. It is a block diagram of the signal conversion circuit in the signal processing apparatus 1 of Example 3 by this invention. It is a block diagram of the signal converter circuit in the signal processing apparatus 1 of Example 4 by this invention. It is a block diagram of the signal converter circuit in the signal processing apparatus 1 of Example 5 by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Signal processing device 2L Field signal processing circuit 2R for left eyes Field signal processing circuit 3 for right eyes 3 Signal conversion circuit 7 Flat image display device 31 Pseudo signal generation circuit 32CL Timing control circuit 32L, 32R, 32RL, 32L2, 32R2 Switch 32SH Pseudo Signal selection switch 101 Stereoscopic image display system 102 Stereo camera device 103 Playback device 104 Switch 105 Field switching switching device 106 Shutter glasses driving circuit 107 CRT display 121R Camera for right eye 121L Camera for left eye 122 Field switching device 113 Recording device 311 White Video signal generation circuit 312 Distribution circuit 313 Black video signal generation circuit 321, 322 Sample hold circuit 331, 332 Field memory 341, 342 Average value acquisition circuit 3 1,352 line memory 361 and 362 average value acquisition circuit

Claims (10)

A signal processing device for processing a field-switching stereoscopic video signal in order to provide a stereoscopic video display to a progressive planar video display device,
A right-eye and left-eye stereoscopic video signal that is repeated for each field in the field switching method is input, and a certain signal value is obtained between the scanning lines of the stereoscopic video signal of the field for the stereoscopic video signal of a certain field. And a signal conversion means for controlling to generate a progressive video signal.   The signal processing apparatus according to claim 1, wherein the pseudo signal has a constant signal value excluding a predetermined zero level. The signal converting means includes
A partial signal extraction means for extracting a video signal of at least a part of the scanning line of the stereoscopic video signal of the field for the stereoscopic video signal of a certain field;
The signal processing apparatus according to claim 1, further comprising pseudo signal generation means for generating the at least part of the video signal as a pseudo signal having the constant signal value.   The signal processing apparatus according to claim 3, wherein the at least part of the video signal includes a signal value of a head video signal of a stereoscopic video signal scanning line in a certain field.   4. The signal according to claim 3, wherein the at least a part of the video signal is composed of an average value from a head video signal of a stereoscopic video signal scanning line in a certain field to a video signal for a predetermined time. Processing equipment.   4. The signal processing apparatus according to claim 3, wherein the at least a part of the video signal is composed of an average value of all the stereoscopic video signal scanning lines in a certain field. The signal converting means includes
Storage means for storing one scanning line of a stereoscopic video signal scanning line signal of the stereoscopic video signal for a certain field in the input field switching type stereoscopic video signal;
A partial signal extracting means for extracting at least a partial video signal from the stored video signal for one scanning line;
The signal processing apparatus according to claim 1, further comprising: a pseudo signal generating unit that generates a signal value based on the at least a part of the video signal as a pseudo signal having the certain signal value. The signal converting means includes
Storage means for storing two scanning lines of a stereoscopic video signal scanning line signal of the stereoscopic video signal for a certain field in the input field switching stereoscopic video signal;
A partial signal extracting means for extracting at least a partial video signal from each of the stored video signals for the two scanning lines;
The signal processing apparatus according to claim 1, further comprising: a pseudo signal generating unit that generates a signal value based on the at least a part of the video signal as a pseudo signal having the certain signal value. The signal converting means includes
Storage means for storing one field of the stereoscopic video signal for a certain field in the input field switching type stereoscopic video signal;
2. The signal processing apparatus according to claim 1, further comprising pseudo signal generation means for generating an average value based on the stored video signal for one field as a pseudo signal having the constant signal value. A signal processing method for processing a field-switching stereoscopic video signal in order to provide a stereoscopic video display to a progressive planar video display device by the signal processing device according to claim 1,
Input a right-eye and left-eye 3D video signal repeated for each field of the field switching method, and display a 3D video signal of a certain field between the scanning lines of the 3D video signal of the field Inserting a pseudo signal having a constant signal value.

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