JP6143477B2 - Video processing system, video processing device, and control method thereof - Google Patents

Description

  The present invention relates to a video processing system, and more particularly to a video processing system, apparatus, and method for processing a moving image by synchronizing a plurality of image processing apparatuses.

  Large-screen, high-definition displays, such as liquid crystals and plasma displays, are in widespread use. Since a display with a large number of pixels has a heavy display process, display control may be performed using a plurality of control LSIs. In such display control, the display screen is divided into a plurality of strip-shaped areas, and each control LSI shares and controls one strip screen. Since each area must display the same video frame in order to form a screen, each control LSI needs to operate in synchronization.

  Patent Literature 1 describes a method for synchronizing display control of a plurality of video transmission devices (for example, switching display modes with the same video frame). In Patent Document 1, the time between video transmission devices is synchronized, the completion of video transmission preparation is detected, and when the video transmission preparation is not in time, the left and right frames of 3D video are output by delaying one frame. Output simultaneously.

Japanese Patent No. 4262019

  However, in the above-described conventional example, there is a problem that a complicated configuration and control are required to reliably synchronize the video transmission control. In particular, when the latency of the communication line that transmits the control timing cannot be guaranteed, the operating field may be shifted.

  The present invention has been made in view of the above problems, and an object of the present invention is to more reliably synchronize the control of a plurality of video apparatuses without increasing the number of signal lines for genlock signals.

In order to achieve the above object, a video processing system according to an aspect of the present invention has the following arrangement. That is,
A video processing system that synchronizes display of video based on video data output from each of a first video processing device and a second video processing device using a genlock signal output from the first video processing device. And
The first video processing device includes:
A specifying means for specifying the timing for changing the video display processing based on the video data;
Notification means for notifying the second video processing device of the content of the change in display processing;
Generating a genlock signal output from the first video processing device to the second video processing device in order to synchronize the display of the video based on the video data output from the first and second video processing devices, respectively. Generating means for generating a genlock signal in which a synchronization signal pulse indicated by the timing specified by the specifying means is modified among a plurality of synchronization signal pulses included in the genlock signal; and
A first change in display processing is performed in synchronization with a frame or field corresponding to the modified sync signal pulse among a plurality of frames or fields corresponding to video data output by the first video processing device. An execution means,
The second video processing device includes:
Detecting means for detecting the modified synchronization signal pulse among a plurality of synchronization signal pulses included in the genlock signal output from the first video processing device;
Of the plurality of frames or fields corresponding to the video data output by the second video processing device , the notifying means is synchronized with the frame or field corresponding to the modified sync signal pulse detected by the detecting means. And a second execution means for executing a change in display processing according to the content notified by .

  According to the present invention, there is an effect that the control of a plurality of video apparatuses can be more reliably synchronized without increasing the number of signal lines for genlock signals.

The block diagram which shows the structure of the apparatus of the video processing system of 1st embodiment. The figure which shows the timing of the genlock interruption by the video processing system of 1st embodiment. The flowchart which shows the flow of a frame synchronization process by the video processing system of 1st embodiment. The flowchart which shows the flow of a frame synchronization process by the video processing system of 2nd embodiment.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. The configurations shown in the following embodiments are merely examples, and the present invention is not limited to the illustrated configurations.

[First embodiment]
In the first embodiment, a plurality of video processing devices including a first video processing device that displays and outputs a first video signal and a second video processing device that displays and outputs a second video signal are operated synchronously. An example of a video processing system that displays each video on one display screen will be described. By sending and supplying a genlock signal from a first video processing device (hereinafter referred to as a master device) operating as a master to a second video processing device (hereinafter referred to as a slave device) operating as a slave, these video processing devices Operates synchronously. The master device transmits the timing to be controlled by changing the shape of the genlock signal to the slave device, and performs control such as switching the display mode at the same frame, for example. The change of the shape of the genlock signal is realized, for example, by changing the line width of the vertical synchronization signal to a predetermined width.

<Configuration of video processing system (FIG. 1)>
FIG. 1 is a block diagram illustrating a configuration example of an apparatus of the video processing system according to the first embodiment. The video processing system 1 includes a master device 10, a slave device 20, and a display panel 2, and the master device 10 and the slave device 20 are connected by a genlock signal 3. The display panel 2 is driven by panel drive signals from the master device 10 and the slave device 20. The master device 10 generates a synchronization signal that serves as a reference for the overall operation of the video processing system 1. The master device 10 outputs a master panel drive signal 4 for driving the display panel, and outputs a genlock signal 3 to the slave device 20. The slave device 20 receives the genlock signal 3 from the master device 10, generates a synchronization signal, and outputs a slave panel drive signal 5 for driving the display panel 2.

  The display panel 2 is a display that displays moving images and the like. The display panel 2 is configured by an arbitrary system such as a direct-view display composed of liquid crystal, plasma, LED, organic EL, or the like, or a projection display composed of LCOS elements. The screen of the display panel 2 is divided into a plurality of areas and is driven to be divided for each area. A video is displayed by inputting a synchronization signal and a video signal for each area of the display panel 2.

  Next, the internal configuration of the master device 10 will be described. The master video input unit 18 inputs video data to be displayed on the display panel 2 as a first video signal. Video data is input by a transmission method based on various interface standards such as HDMI, DVI, and display port. The master image processing unit 19 performs image processing necessary for displaying on the screen of the display panel 2. Examples of such image processing include scaling processing for adjusting to the angle of view of the display panel 2, color conversion processing for adjusting to panel display characteristics, and the like.

  The master synchronization signal generator 11 generates a synchronization signal that is a reference for the overall operation of the video processing system 1. For example, the synchronization signal generated by the master synchronization signal generation unit 11 provides vertical and horizontal reference timings for configuring the screen of the display panel 2. The master synchronization signal generator 11 also adjusts the timing for matching the phase with the frame or field of the input video data. The master delay adjustment unit 12 delays the synchronization signal of the master synchronization signal generation unit 11. Such a delay of the synchronization signal is used for adjusting the processing latency of the master image processing unit 19 and adjusting the output timing of the panel synchronization signal with the slave device.

  The master panel drive unit 13 outputs a master panel drive signal 4 for driving the display panel 2. The master panel drive signal 4 includes a synchronization signal that defines the display timing of the display panel 2 and a video signal that indicates pixel data to be displayed. The synchronization signal includes a vertical synchronization signal, a horizontal synchronization signal, a data enable signal indicating an effective area, and the like. The master panel drive signal 4 is output by a transmission method based on various interface standards such as LVTTL, LVDS, DVI, and display port.

  The signal width modulation unit 14 deforms the genlock signal when an external synchronization request is received from the master control unit 16. In the present embodiment, when there is an external synchronization request, the signal width of the vertical synchronization signal, which is usually 1 line width, is changed to 3 line width. The genlock signal output unit 15 outputs a genlock signal 3 for causing the slave device 20 to operate synchronously. The genlock signal of this embodiment is composed of a vertical synchronization signal and a horizontal synchronization signal. Details of the waveform timing of the genlock signal will be described later. The genlock signal transmission method may be single-ended transmission such as LVTTL or differential transmission such as LVDS. The master control unit 16 includes a CPU, a memory, an auxiliary storage device, a communication interface, and the like, and performs overall control of the master device 10. The master control unit 16 also includes a user interface for inputting an instruction from the user. The signal width modulation unit 14 generates an interrupt signal 17 to the master control unit 16 at the timing when the external synchronization request vertical synchronization signal is output.

  Next, the internal configuration of the slave device 20 will be described. The slave video input unit 28 inputs video data to be displayed on the display panel 2 as a second video signal. The slave image processing unit 29 performs image processing necessary for displaying on the screen of the display panel 2. The genlock signal input unit 21 inputs the genlock signal 3 from the master device 10. The signal width detector 22 detects the signal width of the vertical synchronization signal of the genlock signal 3 input by the genlock signal input unit 21. In this embodiment, since the signal width of the vertical synchronization signal is measured using the horizontal synchronization signal of the genlock signal as a reference, the signal width may be described as a line width. When the signal width detection unit 22 detects that the line width of the vertical synchronization signal is 3 line widths, it determines that an external synchronization request has been made and generates an interrupt signal 30 to the slave control unit 27. .

  The slave synchronization signal generator 24 generates a synchronization signal for operating the slave device 20 based on the input genlock signal. The slave delay adjustment unit 25 delays the synchronization signal generated by the slave synchronization signal generation unit 24. The slave panel drive unit 26 outputs a slave panel drive signal 5 for driving the display panel 2. The slave control unit 27 performs overall control of the slave device 20.

<Genlock signal waveform timing (FIG. 2)>
FIG. 2 is a diagram showing the timing of the genlock signal 3 in the video processing system 1 according to the first embodiment. The genlock signal has two signals, a vertical synchronization signal 214 (extout_vs) and a horizontal synchronization signal 125 (extout_hs). The normal pulse width (signal width) of the vertical synchronization signal 214 is one line width defined by the horizontal synchronization signal 125. When there is an external synchronization interrupt request, the master device 10 outputs a three-line width vertical synchronization signal as a modified vertical synchronization signal. In the master device 10, an external synchronization interrupt is generated in synchronization with the frame of the video signal specified by the timing at which the vertical synchronization signal is deformed (in this embodiment, the frame immediately after the vertical synchronization signal of the genlock signal is deformed). Display control is executed. When the slave device 20 detects the deformation of the vertical synchronization signal (vertical synchronization signal having three line widths), it synchronizes with the frame of the video signal specified by the timing at which the deformation of the vertical synchronization signal is detected, that is, the next An external synchronous interrupt is generated at the frame .

In the master device 10, the vertical synchronization signal 120 and the horizontal synchronization signal 121 are synchronization signals generated by the master synchronization signal generation unit 11. The vertical synchronization signal 120 is asserted at the beginning of each frame . The horizontal synchronization signal 121 is asserted at the beginning of the horizontal scan line. The external synchronization interrupt request signal 122 is a request for an external synchronization interrupt performed by software of the master control unit 16. The synchronous interrupt request is generated, for example, when it is necessary to change display processing such as switching of a display mode to be described later. In FIG. 2, an external synchronization interrupt is requested at the timing of the external synchronization interrupt request signal pulse 130. When an external synchronization interrupt is requested, the master control unit 16 controls the signal width modulation unit 14 so that the genlock signal is deformed in the next frame . The signal width modulation unit 14 modifies the vertical synchronization signal 124 of the genlock signal (the line width is changed to 3 line width) (vertical synchronization signal pulse 133), and the external synchronization interrupt signal is sent to the master control unit 16 in the next frame. 123 is asserted (timing 131). Thus, the external synchronization interrupt is asserted at timing 131 in response to the external synchronization interrupt request signal pulse 130.

The genlock signal vertical synchronization signal 124 and horizontal synchronization signal 125 are output based on the synchronization signal generated by the master synchronization signal generation unit 11. The vertical synchronization signal 124 is asserted at the beginning of each frame . The horizontal sync signal 125 is asserted at the beginning of the horizontal scan line. Vertical synchronizing signal 124 is outputted as a normal in a frame one line width of the vertical sync signal pulse 132, the next frame With external synchronization interrupt request, the vertical sync signal pulse of 3 line width as described above 133 is output. In FIG. 2, in response to an external synchronization interrupt request generated in the # 1 frame , a vertical sync signal pulse 133 having a 3 line width is output in the # 2 frame .

The vertical synchronization signal 126 generated by the slave synchronization signal generation unit 24 of the slave device 20 is generated based on the timing of the input genlock signal (vertical synchronization signal 124). When the signal width detection unit 22 detects a three-line width genlock vertical synchronization signal, the signal width detection unit 22 asserts the external synchronization interrupt signal 127 in the next frame . In FIG. 2, the external synchronization interrupt 127 is asserted at the timing 134 in response to the three-line width vertical synchronization signal pulse 133. The timing 134 at which the external synchronization interrupt signal 127 is asserted in the slave device 20 is the timing of the vertical synchronization signal next to the 3-line width vertical synchronization signal pulse 133. Therefore, the external synchronization interrupt signal 127 is interrupted in the same frame or frame as the master external synchronization interrupt signal 123 (timing 131).

By modifying and detecting the genlock signal as described above, the master device 10 and the slave device 20 can generate an interrupt in the same frame in response to one external synchronous interrupt request.

<Flow of frame synchronization processing (FIG. 3)>
FIG. 3 is a flowchart showing a flow of frame synchronization processing in the video processing system of the first embodiment. When the user inputs an instruction to switch the display mode, switching control is performed on the video frame where the interrupt has occurred by generating an external synchronization interrupt. The switching of the display mode includes, for example, switching from “normal mode” for viewing in a normal room to “cinema mode” for watching a movie in a dark room. In such a case, the image processing parameter of the image processing unit is switched in accordance with the display mode in order to display a video according to each mode.

  Steps S201 to S206 are processes performed by the master control unit 16 of the master device 10. In step S201, the master control unit 16 waits for an instruction from a user interface (not shown) to be input. If there is an instruction from the user, the process proceeds to step S202. If there is no instruction, step S201 is executed again. In step S202, the master control unit 16 notifies the slave device 20 of the display mode switching content. This notification is performed through a predetermined communication interface (not shown). In step S203, a new display mode setting value is retrieved or generated to prepare for display mode switching.

In step S <b> 204, the master control unit 16 requests the signal width modulation unit 14 for an external synchronization interrupt. That is, a request for an external synchronization interrupt is set in the signal width modulation unit 14 so that a 3-line-wide vertical synchronization signal is output as the genlock signal of the next frame . In step S205, the master control unit 16 waits for the external synchronization interrupt signal 123 to be asserted (an external synchronization interrupt occurs). If an external synchronization interrupt has occurred, the process proceeds to step S206, and if not, step S205 is executed again. In step S206, the master control unit 16 executes display control by executing a setting change for switching the display mode (first execution process). For example, the master control unit 16 rewrites the setting registers of the master video input unit 18 and the master image processing unit 19 to settings for a new display mode.

  Steps S210 to S213 are processes performed by the slave control unit 27 of the slave device 20. In step S210, the slave control unit 27 waits for notification of the switching content from the master device 10, and advances the processing to step S211 when the switching content is notified. In step S211, the slave control unit 27 searches for or generates a new set value of the display mode, and prepares for display mode switching. In step S212, the slave control unit 27 waits for the external synchronization interrupt signal 127 to be asserted (an external synchronization interrupt occurs). If an external synchronous interrupt has occurred, the process proceeds to step S213, and if not, step S212 is executed again. As described above, the external synchronization interrupt is output by the signal width detection unit 22. In step S213, the slave control unit 27 executes display control by changing the setting for switching the display mode (second execution process). The setting registers of the slave video input unit 28 and the slave image processing unit 29 are rewritten with settings for a new display mode.

  By controlling as described above, the master device and the slave device can switch the display mode with the same video frame. That is, according to the first embodiment, it is possible to reliably synchronize the control of a plurality of video apparatuses with a simple configuration without increasing the number of signal lines for genlock.

  Note that the present invention is not limited to the above-described embodiment, and can be widely applied. For example, in the above embodiment, a vertical synchronization signal having a three-line width is used to transmit an external synchronization request, but the present invention is not limited to this. Can be used. For example, the signal width of the vertical synchronization signal may be defined in units of line width, or may be defined in terms of the time when the pulse is asserted. Further, when the vertical synchronizing signal is transmitted as an analog waveform, it may be defined by the height of the pulse (signal voltage). Moreover, you may make it use the deformation | transformation of a horizontal synchronizing signal. Further, the external synchronization request may be transmitted by combining the shapes of the vertical synchronization signal and the horizontal synchronization signal. Further, the contents of the display control may be notified depending on how the vertical synchronization signal and the horizontal synchronization signal are modified, or how these modifications are combined. For example, it is possible to execute different display control (change of display processing) when the signal width of the vertical synchronization signal of the genlock signal is deformed to 2 line width and when it is deformed to 3 line width.

  In the first embodiment, the example in which the display mode switching control is synchronized has been described. However, the synchronization control may be arbitrary. For example, switching to a manufacturer's logo screen or blue back screen, or control of return may be used.

  In addition, another example of the change in the display process that can be applied to the above-described synchronous interrupt process is a control for preventing tearing performed when the input / output frame rates do not match. The tearing prevention process is a process for matching the input / output frame rates by inserting a frame that is only once in 1001 frames, for example, when displaying 59.94 Hz video input at 60 Hz. is there. According to the configuration of the first embodiment, the master device 10 and the slave device 20 can be controlled so as to skip or double out the same video frame.

  In the first embodiment, the display control (switching of the display mode) is performed in synchronization with the next frame in which the synchronization signal (vertical synchronization signal) of the genlock signal is modified. However, the present invention is not limited to this. is not. For example, display control may be executed in synchronization with a predetermined frame from a frame in which the synchronization signal (vertical synchronization signal) of the genlock signal is modified.

  In the first embodiment, an example in which each of the master device and the slave device has separate housings has been described. However, the master device and the slave device may be LSIs. A master LSI and a slave LSI may be mounted on a substrate, and a genlock signal may be transmitted by a signal pattern or cable wiring on the substrate.

[Second Embodiment]
Video frames may be synchronized in advance. In the second embodiment, an example will be described in which video frames are synchronized between the master device 10 and the slave device 20 at the time of activation using a genlock interrupt, and the display mode is switched. The configuration of the video processing system of the second embodiment and the waveform of the genlock signal are the same as those of the first embodiment described above. However, in the second embodiment, in the memories of the master control unit 16 and the slave control unit 27, field number counters are provided as a first counter and a second counter for counting the number of fields , respectively. Each of the master control unit 16 and the slave control unit 27 increments the field number counter every time a new field is started.

<Flow of field synchronization processing (FIG. 4)>
FIG. 4 is a flowchart showing the flow of field synchronization processing of the video processing system according to the second embodiment. An external synchronization interrupt is generated when the apparatus is activated, and the field number counter is synchronized. When the user inputs a display mode switching instruction, the display mode switching is controlled in the field having the same field number. Steps S221 to S228 are processes performed by the master control unit 16 of the master device 10, and steps S230 to S235 are processes performed by the slave control unit 27 of the slave device 20.

  In the processing of steps S221 to S223 and steps S230 to S231, the current field number values are matched between the master device 10 and the slave device 20. First, in step S221, the master control unit 16 requests the signal width modulation unit 14 for an external synchronization interrupt. As described in the first embodiment (FIG. 2), the master control unit 16 sets the signal width modulation unit 14 so that a three-line width vertical synchronization signal is output as the genlock signal of the next field. To. In step S222, the master control unit 16 waits for an external synchronization interrupt to occur. If an external synchronization interrupt has occurred, the process proceeds to step S223, and if not, step S222 is executed again. In step S223, the master control unit 16 resets the value of the field number counter.

  Steps S224 to 228 are processes in which the master control unit 16 changes the setting for switching the display mode when there is an instruction to switch the display mode from the user. In step S224, the master control unit 16 waits for a display mode switching instruction to be input from the user interface. If there is a switching instruction from the user, the process proceeds to step S225, and if there is no instruction, step S224 is executed again. In step S225, the master control unit 16 notifies the slave device 20 of the contents of switching and the field number to be switched. For example, the master control unit 16 adds a predetermined number to the current field number to obtain a value of “x”, and notifies the slave device 20 of “switching at the # x-th field”. This notification is performed through a communication interface (not shown).

  In step S226, master control unit 16 searches for or generates a set value for a new display mode, and prepares for display mode switching. In step S227, the master control unit 16 waits for the # x-th field to start. If the # x-th field is started, the process proceeds to step S228, and if it is a different field, step S227 is executed again. In step S228, the master control unit 16 rewrites the setting registers of the master video input unit 18 and the master image processing unit 19 with settings for a new display mode, and changes the setting for switching the display mode. Thereby, display control is performed similarly to the 1st execution process (step S206) mentioned above.

  In step S230, the slave control unit 27 waits for an external synchronization interrupt to occur. If an external synchronization interrupt has occurred, the process proceeds to step S231, and if not, step S230 is executed again. In step S231, the slave control unit 27 resets the value of the field number counter.

  Steps S <b> 232 to S <b> 235 are display mode setting change processing by the slave control unit 27. In step S232, the slave control unit 27 waits for notification of switching contents (including the field number “x” for executing switching) from the master device 10, and when the switching contents are notified, the process proceeds to step S233. . In step S233, the slave control unit 27 searches for or generates a setting value for a new display mode in accordance with the notified contents, and prepares for switching of the display mode. In step S234, the slave control unit 27 waits for the start of the # x-th field. If the # x-th field is started, the process proceeds to step S235, and if it is a different field, step S234 is executed again. In step S235, the slave control unit 27 changes the setting for switching the display mode. The setting registers of the slave video input unit 28 and the slave image processing unit 29 are rewritten with settings for a new display mode. Thereby, display control is performed similarly to the 2nd execution process (step S235) mentioned above.

  By controlling as described above, the display mode can be switched in the same video frame in the master device 10 and the slave device 20. That is, according to the second embodiment, the same effect as that of the first embodiment described above can be obtained.

Note that the present invention is not limited to the above-described embodiment, and can be widely applied. In the first embodiment, an example in which video frame synchronization is performed at the time of startup has been described. However, there is a case where video is not input at the time of startup. In this case, it may be detected that video has been input, and video frame synchronization is performed when the input is detected. Further, during the video display, video frame synchronization may be periodically performed at time intervals of several seconds to several minutes. In the second embodiment, if the contents of display control (for example, switching control) executed by the master device 10 and the slave device 20 have been set in advance in the respective devices, the contents (contents to be switched) in step S225 are set. Notification may be omitted. In the embodiments described above, it may be a display control synchronized with a frame of the video signal may be a display control in synchronization with the field. For example, in the second embodiment, the first and second counters may be counters that count the number of frames .

  The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

Claims (21)

A video processing system that synchronizes display of video based on video data output from each of a first video processing device and a second video processing device using a genlock signal output from the first video processing device. And
The first video processing device includes:
A specifying means for specifying the timing for changing the video display processing based on the video data;
Notification means for notifying the second video processing device of the content of the change in display processing;
Generating a genlock signal output from the first video processing device to the second video processing device in order to synchronize the display of the video based on the video data output from the first and second video processing devices, respectively. Generating means for generating a genlock signal in which a synchronization signal pulse indicated by the timing specified by the specifying means is modified among a plurality of synchronization signal pulses included in the genlock signal; and
A first change in display processing is performed in synchronization with a frame or field corresponding to the modified sync signal pulse among a plurality of frames or fields corresponding to video data output by the first video processing device. An execution means,
The second video processing device includes:
Detecting means for detecting the modified synchronization signal pulse among a plurality of synchronization signal pulses included in the genlock signal output from the first video processing device;
Of the plurality of frames or fields corresponding to the video data output by the second video processing device , the notifying means is synchronized with the frame or field corresponding to the modified sync signal pulse detected by the detecting means. And a second execution means for executing a change in display processing in accordance with the content notified by the video processing system.   The video processing system according to claim 1, wherein the generation unit executes the deformation in response to a request for changing the display process. The first execution means is from a frame or field to which the synchronization signal pulse deformed by the generation means belongs, and the second execution means is from a frame or field to which the synchronization signal pulse whose deformation is detected by the detection means belongs. the image processing system according to claim 1 or 2 respectively and executes a change of the display processing in synchronization with the prescribed order of the frame or field. The first execution means is synchronized with the next frame or field of the frame or field to which the synchronization signal pulse transformed by the generation means belongs, and the second execution means detects the deformation by the detection means. 4. The video processing system according to claim 3 , wherein the display processing is changed in synchronization with the next frame or field of the frame or field to which the synchronizing signal pulse belongs. A first counter that counts the number of frames or fields from the frame or field corresponding to the synchronization signal pulse for which the deformation has been performed in the first video processing device;
Notification means for notifying the number of frames or fields for executing the change from the first video processing apparatus to the second video processing apparatus;
A second counter that counts the number of frames or fields from the frame or field corresponding to the synchronization signal pulse in which the deformation is detected in the second video processing device;
The first execution means executes the change in synchronization with a frame or field when the first counter reaches the number of frames or fields notified by the notification means,
The second execution means executes the change in synchronization with a frame or field when the second counter reaches the number of frames or fields notified by the notification means. Item 5. The video processing system according to any one of Items 1 to 4 . A video processing system that synchronizes display of video based on video data output from each of a first video processing device and a second video processing device using a genlock signal output from the first video processing device. And
The first video processing device includes:
Generating a genlock signal output from the first video processing device to the second video processing device in order to synchronize the display of the video based on the video data output from the first and second video processing devices, respectively. Generating means for generating a genlock signal in which a synchronization signal pulse is transformed among a plurality of synchronization signal pulses included in the genlock signal; and
A first counter for counting the number of clicks or field frames from the frame or field corresponding to the synchronizing signal pulses before Symbol deformation,
And notifying means for notifying the front number system number or field or frame to perform the change of the display processing to the second video processing device,
The first counter includes first execution means for executing the change in synchronization with a frame or a field when the number of frames or fields notified by the notification means is reached;
The second video processing device includes:
Detecting means for detecting the modified synchronization signal pulse among a plurality of synchronization signal pulses included in the genlock signal output from the first video processing device;
A second counter for counting the number of frames or fields from the frame or field corresponding to the synchronization signal pulse in which the deformation is detected by the detection means ;
And characterized in that it comprises pre-Symbol second counter, and a second execution unit configured to execute the changes in synchronism with the frame or field when it reaches the number of clicks or field frames notified by the notification means Film image processing system that. The video processing system according to claim 6 , wherein the notification unit further notifies the contents of the change. The deformation of the sync pulse to a video processing system according to any one of claims 1 to 7, characterized in that a change in the signal voltage changes or the vertical synchronizing signal of the signal width of the vertical synchronizing signal. The video processing system according to any one of claims 1 to 8 , wherein the deformation of the synchronization signal pulse is a change in a signal width of a horizontal synchronization signal or a change in a signal voltage of the horizontal synchronization signal. The first execution means further comprises a first generating means for generating an interrupt signal in synchronism with the frames or fields of the vertical synchronizing signal before Symbol generation means corresponds to the synchronizing signal pulses obtained by modifying, first The display process is changed in response to the interrupt signal generated by the generating means,
It said second execution means further comprises a second generating means for generating an interrupt signal in synchronization with the vertical synchronizing signal of the frame or field before Symbol detection means corresponds to the sync pulse deformed, second the video processing system according to any one of claims 1 to 9, characterized in that to perform a change of the display processing in response to the interrupt signal generating means has generated the. A video processing device for displaying video based on video data,
A specifying means for specifying the timing for changing the video display processing based on the video data;
Notification means for notifying other video processing devices of the content of the display processing change;
Generating means for generating a genlock signal to be output to the other image processing apparatus from the image processing apparatus for synchronizing the display of video based on the video data output respectively to the image processing apparatus by the other video processing device And generating means for generating a genlock signal in which a synchronization signal pulse indicated by the timing specified by the specifying means is transformed among a plurality of synchronization signal pulses included in the genlock signal;
Output means for outputting the genlock signal generated by the generating means to the other video processing device;
Among a plurality of frames or fields corresponding to the image data to which the image processing device outputs, in synchronism with the frame or field corresponding to the modified synchronization signal pulses, and execution means for executing a change in the display process, the A video processing apparatus comprising: A video processing device for displaying video based on video data,
First receiving means for receiving notification of changes in display processing from another video processing device;
A genlock signal output from the other image processing apparatus for synchronizing the display of video based on the video data output respectively to the image processing apparatus by the other video processing device, a plurality of sync pulse Among them, a second receiving means for receiving a genlock signal in which a synchronization signal pulse corresponding to a timing for changing the video display processing is modified;
Detection means for detecting the modified synchronization signal pulse among a plurality of synchronization signal pulses included in the genlock signal received from the other video processing device;
Of the plurality of frames or fields corresponding to the video data output by the video processing device , the first receiving means is synchronized with the frame or field corresponding to the modified sync signal pulse detected by the detecting means. And an execution means for executing a change in display processing in accordance with the content received by the video processing apparatus.   A video processing device for displaying video based on video data,
  Generation means for generating a genlock signal output from the video processing device to the other video processing device in order to synchronize display of video based on video data respectively output by the video processing device and the other video processing device; A generating means for generating a genlock signal in which the synchronization signal pulse is transformed among the plurality of synchronization signal pulses included in the genlock signal;
  A counter that counts the number of frames or fields from the frame or field corresponding to the modified sync signal pulse;
  A notification means for notifying the other video processing device of the number of frames or the number of fields for executing a change in display processing;
  An image processing apparatus comprising: an execution unit that executes the change in synchronization with a frame or a field when the counter reaches the number of frames or fields notified by the notification unit.   A video processing device for displaying video based on video data,
  First receiving means for receiving a notification of the number of frames or the number of fields for executing a change in display processing from another video processing device;
  A genlock signal output from the other video processing device to synchronize display of video based on video data respectively output by the video processing device and the other video processing device, and a plurality of synchronization signal pulses Among them, a second receiving means for receiving a genlock signal in which a synchronization signal pulse corresponding to a timing for changing the video display processing is modified;
  Detecting means for detecting a modified synchronizing signal pulse among a plurality of synchronizing signal pulses included in the genlock signal received by the second receiving means;
  A counter that counts the number of frames or fields from the frame or field corresponding to the synchronization signal pulse in which the deformation is detected by the detection means;
  The counter includes execution means for executing the change in synchronization with a frame or field when the number of frames or fields indicated by the notification received by the first receiving means is reached. Video processing device. Control of video processing system for synchronizing display of video based on video data output from each of first video processing device and second video processing device using genlock signal output from said first video processing device A method,
A specifying step of specifying the timing at which the first video processing device changes video display processing based on video data;
A notification step in which the first video processing device notifies the second video processing device of a change in display processing;
The first video processing device performs the second video processing from the first video processing device in order to synchronize the display of the video based on the video data respectively output by the first and second video processing devices. A generation process for generating a genlock signal to be output to a device, wherein a genlock in which a synchronization signal pulse indicated by the timing specified in the specific process is deformed among a plurality of synchronization signal pulses included in the genlock signal A generating step for generating a signal;
The first video processing device displays in synchronization with a frame or field corresponding to the modified sync signal pulse among a plurality of frames or fields corresponding to video data output by the first video processing device. A first execution step for executing a process change;
A detection step in which the second video processing device detects the deformed synchronization signal pulse among a plurality of synchronization signal pulses included in the genlock signal output from the first video processing device;
The second video processing device corresponds to the modified sync signal pulse detected in the detection step among a plurality of frames or fields corresponding to video data output from the second video processing device. Or a second execution step of executing a change in display processing in accordance with the content notified in the notification step in synchronization with a field.   Control of video processing system for synchronizing display of video based on video data output from each of first video processing device and second video processing device using genlock signal output from said first video processing device A method,
  The first video processing device performs the second video processing from the first video processing device in order to synchronize the display of the video based on the video data respectively output by the first and second video processing devices. A generation step of generating a genlock signal to be output to the device, wherein a generation step of generating a genlock signal in which a synchronization signal pulse is transformed among a plurality of synchronization signal pulses included in the genlock signal;
  A first counting step in which the first video processing device counts the number of frames or fields from the frame or field corresponding to the modified sync signal pulse;
  A notification step in which the first video processing device notifies the second video processing device of the number of frames or the number of fields to be changed in display processing;
  The first video processing device executes the change in synchronization with the frame or field when the count number in the first counting step reaches the frame number or field number notified in the notification step. 1 execution process;
  A detection step in which the second video processing device detects the deformed synchronization signal pulse among a plurality of synchronization signal pulses included in the genlock signal output from the first video processing device;
  A second counting step in which the second video processing device counts the number of frames or fields from the frame or field corresponding to the synchronization signal pulse in which the deformation is detected in the detection step;
  The second video processing device executes the change in synchronization with the frame or field when the count number in the second counting step reaches the frame number or field number notified in the notification step. And an execution step of the video processing system. A control method of a video processing device for displaying video based on video data,
A specifying step in which the specifying means specifies the timing for changing the display processing of the video based on the video data;
A notification step of notifying the other video processing device of the content of the change in the display processing;
Generating means, a genlock signal output to the other image processing apparatus from the image processing apparatus for synchronizing the display of video based on the video data output respectively to the image processing apparatus by the other video processing device A generating step for generating a genlock signal in which a synchronizing signal pulse indicated by the timing specified in the specifying step is transformed among a plurality of synchronizing signal pulses included in the genlock signal; and
An output step for outputting the genlock signal generated in the generation step to the other video processing device;
Execution executing means, wherein among the plurality of frame or field corresponding to image data image processing device outputs, which in synchronism with the frame or field corresponding to said modified synchronizing signal pulses, to perform the change of the display processing And a process for controlling the video processing apparatus. A control method of a video processing device for displaying video based on video data,
A first receiving step in which a first receiving unit receives a notification of a change in display processing from another video processing device;
The second receiving means, a genlock signal output from the other image processing apparatus for synchronizing the display of video based on the video data output respectively to the image processing apparatus by the other video processing device A second reception step of receiving a genlock signal in which the synchronization signal pulse is transformed among the plurality of synchronization signal pulses according to the timing of changing the video display processing;
A detecting step for detecting the modified sync signal pulse among a plurality of sync signal pulses included in the genlock signal received from the other video processing device;
The execution means is synchronized with the frame or field corresponding to the modified synchronization signal pulse detected in the detection step among the plurality of frames or fields corresponding to the video data output by the video processing device , And an execution step of executing a change in display processing according to the content received in the first reception step .   A control method of a video processing device for displaying video based on video data,
  A generation unit generates a genlock signal output from the video processing device to the other video processing device in order to synchronize display of video based on video data respectively output from the video processing device and the other video processing device. A generating step for generating a genlock signal in which a synchronization signal pulse is transformed among a plurality of synchronization signal pulses included in the genlock signal;
  A counting step, wherein the counting means counts the number of frames or fields from the frame or field corresponding to the modified synchronization signal pulse;
  A notification step of notifying the other video processing device of the number of frames or the number of fields for executing a change in display processing;
  An execution unit includes an execution step of executing the change in synchronization with a frame or a field when the count value of the counting step reaches the number of frames or fields notified in the notification step. Control method for video processing apparatus.   A control method of a video processing device for displaying video based on video data,
  A first receiving step in which a first receiving means receives a notification of the number of frames or the number of fields for executing a change in display processing from another video processing device;
  The second receiving means is a genlock signal output from the other video processing device to synchronize the display of the video based on the video data respectively output from the video processing device and the other video processing device. A second reception step of receiving a genlock signal in which the synchronization signal pulse is transformed among the plurality of synchronization signal pulses according to the timing of changing the video display processing;
  A detecting step for detecting a modified synchronizing signal pulse among a plurality of synchronizing signal pulses included in the genlock signal received in the second receiving step;
  A counting step that counts the number of frames or fields from the frame or field corresponding to the synchronization signal pulse in which the deformation is detected by the detection step;
  An execution step in which execution means executes the change in synchronization with a frame or field when the count value in the counting step reaches the number of frames or fields indicated by the notification received in the first reception step; A method for controlling a video processing apparatus, comprising: A program for causing a computer to execute each step of a control method for a video processing apparatus according to any one of claims 17 to 20 .

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