JP2009276557A - Video processing device, video processing lsi, display, car navigation system, mixing ratio information generating method, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a frame memory for mixing ratio data is required when mixing a plurality of input video data by controlling a mixing ratio in pixel units in a display. <P>SOLUTION: The video processing device includes: a first video input terminal 25 to input first video data; a second video input terminal 26 to input second video data; a mixing ratio information input terminal 29 to input mixing ratio data for mixing the video data in the pixel units from an external mixing ratio information output unit 13 outputting the mixing ratio data while generating it for each pixel; a first video signal processing part 20 to adjust and output the input first video data; a second video signal processing part 21 to adjust and output the input second video data; and a mixing processing part 22 to mix and output the adjusted first and second video data for each pixel by using the input mixing ratio data. The mixing ratio data, the adjusted first video data and the adjusted second video data input in the mixing processing part 22 are synchronized with each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a video processing device, a video processing LSI, a display device, a car navigation system, a mixing ratio information generation method, and the like.

  In recent years, car navigation systems have been installed in many vehicles. The car navigation system displays a map and a current position on a display device, and also displays an operation menu and other useful information on the display device.

  Recently, display devices for car navigation systems are required to have high-quality display. As a technique for realizing high-quality display, there is a display device that displays using a two-video α blend composition process in which the transparency (α) can be changed in units of pixels.

  The α (alpha) blend is to synthesize two images with a coefficient (α value), and the pixel value Value after the α blend is expressed by equation (1).

Value = Value0 × (1.0−α) + Value1 × α (1)
Here, Value0 is the background pixel value, and Value1 is the foreground pixel value. α is a coefficient having a value of 0 to 1, and is a value representing how much is transmitted. When α is 1, it is completely opaque, and when α is 0, the foreground is completely transparent.

  In the case where the degree of semi-transparency is controlled finely in pixel units, the pixel value Value is calculated by the equation (1) for each pixel using the α value set for each pixel.

  FIG. 15 shows a configuration diagram of a conventional car navigation system including a display device having a 2-video α blend composition function.

  A display device 101 having a two-video α blend composition function is connected to the navigation main body 100 by an external bus 102.

  The CPU 103 of the navigation main body 100 controls the entire navigation system. CPU103 receives sensor information, such as a GPS receiver and a gyro, from sensor 105, and detects the own vehicle position. Further, the CPU 103 causes the navigation drawing processing unit 107 to create navigation video data to be displayed on the display device 101 in accordance with an instruction from the operation unit 104 such as a remote controller, and the generated navigation video data is transmitted to the external bus 102. To the display device 101. Further, the CPU 103 causes the navigation drawing processing unit 107 to create a video of an operation menu to be displayed on the display device 101 as navigation video data, and transmits it to the display device 101.

  A storage unit 106 such as an HDD or a magneto-optical disk stores a map information DB, a route information DB, and the like necessary for creating navigation video data. The navigation drawing processing unit 107 creates navigation video data using these pieces of information stored in the storage unit 106.

  The video processing LSI 109 of the display apparatus 101 causes the display panel 110 to display a blend of a plurality of navigation video data received from the navigation main body 100 via the external bus 102 by α blending.

  The α data frame memory 111 of the display device 101 stores α value data for a plurality of screens in which α value data is preset for each pixel.

  The control microcomputer 108 instructs the video processing LSI 109 in response to the plurality of navigation video data received from the navigation main body 100, and the video processing LSI 109 is stored in the α data frame memory 111. The α value data for one designated screen is selected from the α value data for a plurality of screens, and the α blend composition processing is performed.

  For example, navigation video data for displaying a map including the vehicle position and navigation video data for displaying an operation menu are transmitted from the navigation body 100 to the display device 101 via the external bus 102. Sometimes, the control microcomputer 108 instructs the video processing LSI 109 to use the α blend pattern (semi-transparent) corresponding to the operation menu, and the video processing LSI 109 superimposes the semi-transparent operation menu display on the map display. Can be displayed on the display panel 110.

  Next, the contents of α blend composition processing in the video processing LSI 109 will be described.

  FIG. 16 is a diagram for explaining an α blend composition processing method in the video processing LSI 109.

  An image mixing unit 125 in FIG. 16 shows a functional part that performs the α blend composition processing of the video processing LSI 109. Further, the first image data and the second image data shown in FIG. 16 are an example of a plurality of navigation video data transmitted from the navigation main body 100.

  The first image data buffer memory 121 and the second image data buffer memory 122 are buffers for temporarily storing the first image data and the second image data transmitted from the navigation main body 100, respectively. It is provided inside the processing LSI 109 or outside the video processing LSI 109.

  The first image data is stored in the first image data buffer memory 121, and the second image data is stored in the second image data buffer memory 122. Here, the first and second image data is, for example, color image data in which each pixel data is composed of three primary color data of red, blue, and green, each primary color data is 8 bits, and the image data is Consists of 24 bits.

  As described above, the α value data for a plurality of screens in which the α value for each pixel is set are stored in the α data frame memory 111. Here, the α value data for each pixel is 8 bits.

  The image mixing unit 125 reads out image data from the first image data buffer memory 121 and the second image data buffer memory 122 in units of pixels, and converts α value data of the same pixels as these image data into an α data frame. Out of a plurality of screens stored in the memory 111, data is read from screen data corresponding to a pattern instructed from the control microcomputer 108.

  Pixel data from the first image data buffer memory 121 and the second image data buffer memory 122 are supplied to multiplication circuits 126 and 127 of the image mixing unit 125, respectively. Then, the α value of the pixel corresponding to these pixels is supplied to the multiplication circuit 126 and is also supplied to the (1-α) calculation circuit 128 to be the data of (1-α), and is supplied to the multiplication circuit 127. Is done.

  The output data of the multiplication circuits 126 and 127 are mixed by the mixing circuit 129 and output. The mixed image data is input to the display panel 110 and displayed.

  In this way, the display device 101 performs the alpha blend composition processing for each pixel to realize high-definition display.

  Also, an α blend composition processing method for reducing the capacity of the α data frame memory 111 of FIG. 16 has been proposed (see, for example, Patent Document 1).

  FIG. 17 shows a diagram for explaining the α blend synthesis processing method proposed in Patent Document 1. In FIG.

  In this configuration, an α entry data frame memory 124 and a mixing ratio table 123 are provided instead of the α data frame memory 111 of FIG.

  In the example of FIG. 17, the mixture ratio table 123 includes 64 pieces of 8-bit α value data. In the α entry data frame memory 124, information (α entry data) for obtaining the α value of the pixel from the mixing ratio table 123 for each pixel for one screen is stored for a plurality of screens. Here, the α entry data is address information in the mixture ratio table 123 in which the set α value is stored.

  In the case of FIG. 16, the image mixing unit 125 reads the α value of the corresponding pixel from the α data frame memory 111, whereas in FIG. 17, the α entry data of the corresponding pixel is used for the α entry data. Read from the frame memory, read the α value corresponding to the read α entry data from the mixing ratio table 123, and use the α value for the mixing processing calculation.

In the example of FIG. 17, the α entry data corresponding to each pixel is 6 bits. Therefore, the capacity required for the α entry data frame memory 124 of FIG. 17 is the capacity required for the α data frame memory 111 of FIG. It becomes 3/4 (6 bits / 8 bits), and the memory capacity required for the mixed processing operation can be reduced.
Japanese Patent Laid-Open No. 07-282269

  However, in such a conventional device, since a plurality of input video data are mixed by controlling the mixing ratio in units of pixels on the display device side, a frame memory for the mixing ratio data is necessary.

  That is, in the case of the mixed processing method shown in FIG. 16, the α data frame memory 111 is necessary. In this case, in order to set the α value in units of pixels, a memory capacity corresponding to the number of pixels of one screen × 8 bits is required as α value data for one screen.

  Therefore, in order to realize a variety of mixed patterns, α value data corresponding to a large number of screens is required, and a lot of memories must be provided, resulting in high costs. On the other hand, if the memory capacity is limited for cost reduction, the number of mixed patterns that can be handled is reduced.

  Also, in the case of the mixed processing method shown in FIG. 17, the required memory capacity is reduced as compared with the case of FIG. 16, but the α value data for one screen is equivalent to the number of pixels of one screen × 6 bits. Memory capacity is required. Even in this case, the required memory capacity can only be reduced to about 3/4 compared to the case of FIG.

  In consideration of the above-described conventional problems, the present invention provides a video processing device and a video processing LSI capable of mixing a plurality of input video data by controlling the mixing ratio in units of pixels without requiring a frame memory for the mixing ratio data. An object is to provide a display device, a car navigation system, a mixing ratio information generation method, and the like.

In order to solve the above-described problem, the first aspect of the present invention provides:
A first video input terminal for inputting first video data;
A second video input terminal for inputting second video data;
Generate mixing ratio information for each pixel, which is mixing ratio data or quasi-mixing ratio data for calculating the mixing ratio data for mixing the first video data and the second video data in units of pixels. A mixing ratio information input terminal for inputting the mixing ratio information from an external mixing ratio information output unit that outputs
A first video signal processing unit that adjusts and outputs the first video data input to the first video input terminal;
A second video signal processing unit that adjusts and outputs the second video data input to the second video input terminal;
Using the mixture ratio data calculated from the quasi-mixture ratio data input to the mixture ratio information input terminal or the mixture ratio data input to the mixture ratio information input terminal, the first video is displayed for each pixel. A mixing processing unit that mixes and outputs the first video data adjusted by the signal processing unit and the second video data adjusted by the second video signal processing unit;
In the video processing device, the mixing ratio data, the adjusted first video data, and the adjusted second video data input to the mixing processing unit are synchronized.

The second aspect of the present invention provides
When the mixing ratio information input to the mixing ratio information input terminal is the quasi-mixing ratio data, the mixing ratio data is transferred from the quasi-mixing ratio data between the mixing ratio information input terminal and the mixing processing unit. The video processing device according to the first aspect of the present invention is provided with a mixing ratio data calculation circuit for calculating.

The third aspect of the present invention
The quasi-mixing ratio data is index information for selecting the mixing ratio data,
A mixing ratio table that associates the quasi-mixing ratio data with the mixing ratio data;
The mixing ratio data calculation circuit is the video processing device according to the second aspect of the present invention, wherein the mixing ratio data is calculated from the quasi-mixing ratio data for each pixel using the mixing ratio table.

The fourth aspect of the present invention is
A synchronization signal output terminal for outputting a synchronization signal for synchronizing the signal of the mixing ratio information to the second video data input to the second video input terminal;
The mixing ratio information output unit receives the synchronization signal output from the synchronization signal output terminal, and outputs the mixing ratio information in synchronization with the synchronization signal. This is a video processing device.

The fifth aspect of the present invention provides
The fourth aspect of the present invention is that the mixing ratio information output unit is a video data generation device that outputs the first video data input to the first video input terminal in synchronization with the input synchronization signal. This is a video processing device.

The sixth aspect of the present invention provides
The first video data is the video processing device of the fifth aspect of the present invention, which is OSD video data.

The seventh aspect of the present invention
The second video data is the video processing device according to the sixth aspect of the present invention, which is video data for car navigation or video data for television.

In addition, the eighth aspect of the present invention
A delay circuit for synchronizing the mixing ratio data input to the mixing processing unit with the adjusted first video data and the adjusted second video data includes: the mixing ratio information input terminal; The video processing device according to any one of the first to seventh aspects of the present invention, which is provided between the mixing processing unit.

The ninth aspect of the present invention provides
A third video input terminal for inputting OSD video data;
A third video signal processor that adjusts and outputs the OSD video data input to the third video input terminal;
A combination information input terminal for inputting combination information indicating which video data is to be mixed from the mixing ratio information output unit;
One of the first video data and the second video data is video data for car navigation, and the other is video data for television.
The mixing ratio information output unit outputs the OSD video data in synchronization with the input synchronization signal,
The mixing processing unit includes the first video data adjusted by the first video signal processing unit, the second video data adjusted by the second video signal processing unit, and the third video. The video processing device according to a fourth aspect of the present invention, wherein video data selected by the combination information among the OSD video data adjusted by the signal processing unit is mixed for each pixel using the mixing ratio data. .

The tenth aspect of the present invention is
There are a plurality of the mixture ratio information input terminals,
The mixing ratio data or the quasi-mixing ratio data is the video processing device according to any one of the first to ninth aspects of the present invention, wherein parallel data is input to the plurality of mixing ratio information input terminals.

The eleventh aspect of the present invention is
The mixing ratio data or the quasi-mixing ratio data is the video processing device according to any one of the first to ninth aspects of the present invention, wherein serial data is input to the mixing ratio information input terminal.

The twelfth aspect of the present invention is
A video processing LSI including the video processing devices according to the first to eleventh aspects of the present invention.

The thirteenth aspect of the present invention is
Any one of the first to eleventh video processing devices of the present invention;
A microcomputer that operates as the mixing ratio information output unit and controls the operation of the video processing device;
And a display panel that displays video data output from the video processing device.

The fourteenth aspect of the present invention is
A display device according to a thirteenth aspect of the present invention;
A car navigation system that generates and outputs video data for car navigation,
A car navigation system including a TV tuner that outputs video data for TV.

The fifteenth aspect of the present invention provides
In the display device according to a thirteenth aspect of the present invention, the microcomputer generates the mixing ratio information.
In correspondence with the combination of the first video data and the second video data input to the video processing device, a mixture ratio information pattern for a region to be mixed is determined in advance,
A mixing ratio information pattern acquisition step for acquiring the mixing ratio information pattern corresponding to a combination of the first video data and the second video data in response to a display instruction input from an input interface;
A mixture ratio information generation method comprising: a mixture ratio information calculation step for calculating the mixture ratio information for each pixel based on the acquired mixture ratio information pattern.

The 16th aspect of the present invention is
The mixing ratio information generation method according to the fifteenth aspect of the present invention acquires the mixing ratio information pattern corresponding to a combination of the first video data and the second video data according to a display instruction input from an input interface. A program for causing a computer to execute the mixture ratio information pattern acquisition step and the mixture ratio information calculation step of calculating the mixture ratio information for each pixel based on the acquired mixture ratio information pattern.

The seventeenth aspect of the present invention
A recording medium on which the program of the sixteenth aspect of the present invention is recorded, and is a recording medium that can be processed by a computer.

  According to the present invention, a video processing device, a video processing LSI, a display device, a car navigation system, and a video processing device capable of mixing a plurality of input video data by controlling the mixing ratio in units of pixels without requiring a frame memory for the mixing ratio data, and A mixing ratio information generation method and the like can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a configuration diagram of the car navigation system according to the first embodiment of the present invention.

  In the car navigation system of the first embodiment, the display device 10 and the navigation main body 60 are connected via an external bus 61 such as a flexible cable.

  As can be seen from comparison with the configuration of the video processing LSI of the conventional display device shown in FIGS. 16 and 17, the display device 10 of the first embodiment has the α data frame memory 111 of FIG. 16 and the α data frame of FIG. A frame memory necessary for mixing a plurality of video data such as the entry data frame memory 124 is not provided.

  The navigation main body 60 includes a CPU 62, a navigation drawing processing unit 66, an operation unit 63 such as a touch panel and a remote controller, a sensor 64 for detecting various information related to car navigation, and a storage unit 65 including a semiconductor memory, HDD, magneto-optical disk, and the like. ing.

  The CPU 62 controls the entire navigation system, and receives sensor information such as a GPS receiver, a gyro, and a vehicle speed pulse sensor from the sensor 64, and detects the position of the host vehicle. Further, a navigation program such as calculating an optimum route connecting the departure point and the destination input from the operation unit 63 is executed.

  Then, the CPU 62 causes the navigation drawing processing unit 66 to create navigation video data to be displayed on the display device 10, and transmits the created navigation video data to the display device 10 via the external bus 61.

  The storage unit 65 stores a map information DB, a route information DB, a spot information DB, a landmark DB, and the like necessary for creating navigation video data. The navigation drawing processing unit 66 creates navigation video data using these pieces of information stored in the storage unit 65.

  The display device 10 includes a video processing LSI 11, a display panel 12, and a microcomputer 13.

  The microcomputer 13 is a microcomputer having a function of generating OSD video data, OSD video data to be displayed superimposed on the navigation video data input from the navigation body 60 to the video processing LSI 11 via the external bus 61, and the OSD video data Mixing ratio data (α value) set for each pixel when mixing the OSD video data is generated and input to the video processing LSI 11.

  The video processing LSI 11 mixes and outputs the OSD video data input from the microcomputer 13 to the navigation video data input from the navigation body 60 and causes the display panel 12 to display the mixed video.

  Next, the detailed configuration of the video processing LSI 11 and the operation of the two video mixing process in the display device 10 will be described with reference to FIG.

  FIG. 2 is a configuration diagram of the display device 10 according to the first embodiment. The same parts as those shown in FIG. 1 are denoted by the same reference numerals.

  The video processing LSI 11 includes an OSD video signal processing unit 20, a navigation video signal processing unit 21, a mixing processing unit 22, a synchronization signal generation unit 23, and a delay circuit 24. The video processing LSI 11 includes video input terminals 25 and 26, a video output terminal 27, a synchronization signal output terminal 28, and a mixing ratio information input terminal 29.

  The video processing LSI 11 corresponds to an example of the video processing device of the present invention, and also corresponds to an example of the video processing LSI of the present invention. The video input terminals 25 and 26 are examples of the first and second video input terminals of the present invention, respectively. The OSD video signal processing unit 20 corresponds to an example of the first video signal processing unit of the present invention, and the navigation video signal processing unit 21 corresponds to an example of the second video signal processing unit of the present invention.

  Navigation video data output from the navigation main body 60 is input to the video input terminal 26 of the video processing LSI 11 via the external bus 61.

  Here, in the navigation video data input to the video input terminal 26, each pixel data is color video data composed of three primary color data of red, blue and green, and each primary color data is 24 bits each consisting of 8 bits. It is assumed to be bit data.

  The navigation video signal processing unit 21 converts the YUV signal into the RGB signal for the navigation video data input to the video input terminal 26, and performs gamma correction, contrast adjustment, bright adjustment, external light luminance adjustment, and the like. Output. In addition to these adjustments, the navigation video signal processing unit 21 also performs processing for enlarging or reducing the image size of the input navigation video data in accordance with an instruction from the microcomputer 13.

  The synchronization signal generator 23 generates a synchronization signal for synchronizing with the navigation video signal input to the video input terminal 26, and outputs it from the synchronization signal output terminal 28.

  In addition, the display device 10 includes an infrared light receiving unit 14 that receives a signal transmitted by infrared from the remote controller 15 and passes the signal to the microcomputer 13. The user operates the display device 10 using the remote controller 15. A configuration in which the infrared light receiving unit 14 and the remote controller 15 are combined is an example of the input interface of the present invention.

  The microcomputer 13 creates OSD video data to be displayed superimposed on the navigation video data input to the display device 10 according to the signal received by the infrared light receiver 14 from the remote controller 15, and is input from the video processing LSI 11. The generated OSD video data is output to the video input terminal 25 in synchronization with the synchronization signal. Further, the microcomputer 13 generates and outputs, for each pixel, mixing ratio data for mixing the output OSD video data with the navigation video data in synchronization with the synchronization signal input from the video processing LSI 11.

  Here, the mixture ratio data output from the microcomputer 13 is an α value used for the α blend composition processing set for each pixel. Here, the α value set for each pixel is 8 bits. A method for generating the mixture ratio data in the microcomputer 13 at this time will be described later.

  The microcomputer 13 corresponds to an example of the mixing ratio information output unit of the present invention.

  The OSD video data output from the microcomputer 13 is an RGB signal and is input to the video input terminal 25 of the video processing LSI 11. Since the OSD video data input at this time is created in synchronization with the synchronization signal input to the microcomputer 13, it is synchronized with the navigation video data input to the video input terminal 26.

  The OSD video signal processing unit 20 performs gamma correction, contrast adjustment, brightness adjustment, external light luminance adjustment, and the like on the OSD video data input to the video input terminal 25 and outputs the result.

  Here, the processing in the OSD video signal processing unit 20 and the processing in the navigation video signal processing unit 21 are adjusted by the OSD video signal processing unit 20 and output, and adjusted by the navigation video signal processing unit 21. It is set to synchronize with the output navigation video data. Therefore, the OSD video data adjusted by the OSD video signal processing unit 20 and the navigation video data adjusted by the navigation video signal processing unit 21 are input to the mixing processing unit 22 in synchronization.

  On the other hand, the mixture ratio data output from the microcomputer 13 is input to the mixture ratio information input terminal 29 of the video processing LSI 11. Since the mixing ratio data input to the mixing ratio information input terminal 29 is generated in synchronization with the synchronization signal input to the microcomputer 13, the mixing ratio data is synchronized with the navigation video data input to the video input terminal 26.

  The delay circuit 24 mixes the mixture ratio data input to the mixture ratio information input terminal 29 after the navigation video data is input to the video input terminal 26, and is adjusted by the navigation video signal processing unit 21 before being output, Delay. As a result, the navigation processing unit 22 receives the navigation video data output from the navigation video signal processing unit 21, the OSD video data output from the OSD video signal processing unit 20, and the mixing ratio data output from the delay circuit 24. Input synchronously.

  The mixing processing unit 22 performs alpha blend composition processing of navigation video data and OSD video data using the mixing ratio data for each pixel using these data input in synchronization with each pixel, and the mixing The processed video data is output from the video output terminal 27.

  Then, video data in which navigation video data and OSD video data are mixed for each pixel is input to the display panel 12 and displayed.

  Next, a method for generating the mixture ratio data in the microcomputer 13 will be described.

  In the display device 10 according to the first embodiment, the OSD video data output from the microcomputer 13 is determined in advance according to the signal received by the infrared light receiving unit 14 from the remote controller 15, and the OSD video data is determined for each OSD video data. A mixing ratio data setting pattern (a combination setting pattern of α values set for each pixel) is determined in advance for an area where video data is mixed with navigation video data, that is, a display area of OSD video data.

  The microcomputer 13 obtains, from the infrared light receiving unit 14, the OSD video data to be output according to the signal received from the infrared light receiving unit 14 and the mixing ratio data calculation formula for calculating the mixing ratio data setting pattern corresponding to the OSD video data. Corresponding to the received signal, the related information is held in the memory in the microcomputer 13.

  When the microcomputer 13 receives the signal received from the remote controller 15 by the infrared light receiver 14, the microcomputer 13 generates and outputs OSD video data corresponding to the signal, and uses the mixing ratio data calculation formula to output the mixing ratio data for each pixel. Calculate and output.

  FIG. 3 shows a specific example of a plurality of pattern types prepared in advance in the microcomputer 13.

  In the specific example of FIG. 3, eleven types of patterns are set in advance. In this case, any one of these 11 types of patterns is associated with a signal received from the infrared light receiving unit 14 in advance.

  The “mixing ratio data (α value) setting pattern” in FIG. 3 describes a specific α value set for each pixel in the OSD video data area.

Each pattern type (pattern 1 to pattern 11) is associated with a mixing ratio data calculation formula (f ₁ (x) to f ₁₁ (x)), and the microcomputer 13 has these two pieces of information. is doing.

  In the case of Pattern 1 to Pattern 3, the same α value is set for all the pixels. In these cases, the OSD video data is superimposed and displayed on the navigation video data with uniform transparency.

  In the case of pattern 4 to pattern 7, a display with a change in transparency in the left-right direction of the OSD area is displayed, and in the case of pattern 8 to pattern 11, a display with a change in the transparency in the vertical direction of the OSD area is displayed. .

These calculation formulas (f ₁ (x) to f ₁₁ (x)) are all simple, and the microcomputer 13 having an OSD generation function used in a general display device or the like has a capacity, Both processing speeds can be handled without problems.

  FIG. 4 shows a processing flow when the microcomputer 13 generates the mixing ratio data for each pixel.

  Here, the setting pattern of FIG. 3 will be described as an example. Here, the number of pixels in the area where the OSD video data is displayed is described as n.

  When the user presses a button on the remote controller 15 to operate the display device 10, the infrared light receiver 14 receives infrared light emitted from the remote controller 15 and passes the signal to the microcomputer 13.

The microcomputer 13 calculates a formula f for creating a mixture ratio data (α value) setting pattern of a pattern m (m is an integer of 1 ≦ m ≦ 11) associated with the signal received from the infrared light receiving unit 14. _m (x) is selected (step S1).

  The signal received from the infrared light receiver 14 by the microcomputer 13 corresponds to an example of a display instruction input from the input interface according to the present invention. Moreover, the process of step S1 which acquires the pattern m matched with the signal which the microcomputer 13 received from the infrared rays light-receiving part 14 corresponds to an example of the mixture ratio information pattern acquisition step of this invention. The microcomputer 13 is an example of a computer according to the present invention.

  First, 0 is input to the pixel number x (step S2), and then 1 is added to the pixel number x (step S3).

  Next, the mixture ratio data α (x) corresponding to the pixel number x is calculated (step S4).

  Then, the synchronization signal output from the synchronization signal output terminal 28 of the video processing LSI 11 is monitored (step S5), and the calculated mixture ratio data α (x) is output in accordance with the input synchronization signal (step S6). .

  And the process of step S3-step S6 is repeated until the pixel number x reaches the pixel number n (step S7).

  Note that the process of repeatedly performing the processing of step S3 to step S5 and calculating the mixture ratio data α of each pixel corresponds to an example of the mixture ratio information calculating step of the present invention.

  By processing in this way, the mixture ratio data corresponding to the instruction pattern m corresponding to the signal received from the infrared light receiving unit 14 is output from the microcomputer 13 for each pixel in synchronization with the navigation video data.

  FIG. 5 shows a display example in which the OSD video is mixed with the navigation video and displayed on the display panel 12 of the display device 10 according to the first embodiment.

  FIG. 5 shows an example in which the “map scale switching menu” is mixedly displayed on the navigation video by the remote controller 15. In this case, OSD video data of three areas on the screen of the display panel 12 is created by the microcomputer 13 and displayed superimposed on the navigation video.

  In this case, for example, the OSD video data of two areas displayed in a semi-transparent state is displayed using the mixture ratio data of the pattern 2 in FIG. 3, and one area displayed in an opaque state. The OSD video data is displayed using the mixture ratio data of pattern 3 in FIG.

  In FIG. 3, a simple pattern is described as an example of the mixture ratio data setting pattern, but a more complicated pattern may be set. For example, even a pattern in which the transparency changes from the upper left corner to the lower right corner, or a pattern in which the transparency of the central portion is the lowest and increases as the distance from the center increases, can be handled with a simple calculation formula.

  Also, the mixture ratio data setting pattern may include an element that changes with time, and the microcomputer 13 may calculate and transmit the mixture ratio data while changing with time. In this case, for example, the characters of the OSD video data displayed in a superimposed manner can be changed and displayed so as to become darker or thinner in time.

  In this example, the mixing ratio data setting pattern is obtained by a calculation formula. However, the mixing ratio data setting pattern is associated with each OSD video generated by the microcomputer 13 and stored in the memory in the microcomputer 13. You may do it. Since the microcomputer 13 having the function of generating the OSD video data as in the first embodiment is normally configured to hold font and image information in the memory of the microcomputer, the mixture ratio data setting pattern is held. However, the effect on the memory capacity is small.

  When the mixing ratio data setting pattern is stored in the memory in the microcomputer 13 in association with the font or image information, a more complicated mixed display can be performed.

  FIG. 6 shows a partial enlarged display example of the screen of the display panel 12 when the mixture ratio data setting pattern is associated with the font and the image information.

  This is an example in which the OSD video indicating the “time” generated by the microcomputer 13 is mixedly displayed on the upper left portion of the display panel 12 displaying the navigation video. In this way, in one OSD image, a frame and a numerical portion are opaque (α = 1), and a mixed display in which only the background portion of a character is translucent (α = 0.5) can also be realized.

  Further, in this case, a mixed display in which the transparency changes depending on the color, for example, only blue is made translucent in one OSD video by the processing of the microcomputer 13 can be realized.

  In addition, the calculation formula and the mixing ratio data setting pattern corresponding to the OSD video to be output are not stored in the memory in the microcomputer 13 but the mixing setting information for mixing the OSD video is stored in the remote controller 15. In addition, when the OSD video display instruction is transmitted from the remote controller 15, the mixing setting information for mixing the OSD video may be transmitted.

  For example, when instructing display of a menu from the remote controller 15, “pattern type” information for displaying the menu in a mixed manner is also transmitted from the remote controller 15, and the microcomputer 13 generates OSD video data, and the “pattern type” The mixing ratio data for each pixel corresponding to "" is generated, and the generated mixing ratio data is output in synchronization with the OSD video data. Thereby, for example, by operating the operation button of the remote controller 15, the menu display that is mixedly displayed on the display panel 12 is changed to a semi-transparent display through which the lower image can be seen or a non-transparent display. Switching operation can be performed.

  Further, the mixture ratio data output from the microcomputer 13 may output only the mixture ratio data corresponding to the pixels in the OSD area, or may correspond to all the pixels in the entire display area including the area other than the OSD area. The mixing ratio data may be output. When outputting the mixture ratio data corresponding to all the pixels in the entire display area from the microcomputer 13, the mixture ratio data corresponding to the pixels in the area other than the OSD area is α ratio = 0 where the foreground is transparent. May be output.

  The display device 10 having the configuration shown in FIGS. 1 and 2 displays the navigation video data output from the navigation main body 60. The display device having the configuration according to the first embodiment has the navigation video data. It can also be applied as a display device for displaying input video data other than the above. For example, television video data output as an NTSC composite signal from a television tuner can be input and displayed on the display device having the configuration of the first embodiment.

  FIG. 7 shows a configuration diagram of the display device 33 according to the first embodiment connected to the TV tuner. The same reference numerals are used for the same components as those of the display device 10 shown in FIG.

  The video processing LSI 35 of the display device 33 shown in FIG. 7 includes a television video signal processing unit 34 instead of the navigation video signal processing unit 21 of the video processing LSI 11 shown in FIG.

  In the display device 33 of FIG. 7, the TV image data output from the connected TV tuner is input to the image input terminal 26.

  The TV video signal processing unit 34 receives the TV video data input to the video input terminal 26, demodulates and converts the TV video data into RGB signals, performs signal processing, and outputs the signals.

  Then, the video signal adjusted by the TV video signal processing unit 34 is input to the mixing processing unit 22 instead of the video signal adjusted by the navigation video signal processing unit 21 in the case of the display device 10 of FIG. Entered.

  The synchronization signal generator 23 generates a synchronization signal for synchronizing with the television video signal input to the video input terminal 26 and outputs the synchronization signal from the synchronization signal output terminal 28.

  The microcomputer 13 creates OSD video data to be superimposed and displayed on the television video data input to the display device 33 in accordance with the signal received by the infrared light receiver 14 from the remote controller 15, and is input from the video processing LSI 35. The generated OSD video data is output to the video input terminal 25 in synchronization with the synchronization signal. Further, the microcomputer 13 generates and outputs, for each pixel, mixing ratio data for mixing the output OSD video data with the television video data in synchronization with the synchronization signal input from the video processing LSI 35. The microcomputer 13 creates the mixture ratio data for each pixel by the same method as in the display device 10 of FIG.

  In this manner, video data in which TV video data and OSD video data are mixed for each pixel is displayed on the display panel 12 of the display device 33 of FIG.

  In the case of the display device 33 in FIG. 7, the video processing LSI 35 is an example of the video processing device of the present invention, and is also an example of the video processing LSI of the present invention. The television video signal processing unit 34 is an example of the second video signal processing unit of the present invention.

  FIG. 8 shows a display example in which the OSD video is mixed with the TV video and displayed on the display panel 12 of the display device 33 of the first embodiment.

  This is an example in which an OSD image for display adjustment is mixedly displayed at the center portion of the display panel 12 displaying a television image. In this case, the OSD video data for display adjustment is held in the microcomputer 13 in advance, and the microcomputer 13 outputs the OSD video data according to the input signal from the remote controller 15 and displays it on the display panel 12.

  As shown in FIG. 8, in one OSD image, the frame and character are opaque (α = 1), the adjustment button is translucent (α = 0.5), and the area around the button A mixed display in which the background portion is more translucent (α = 0.2) can be realized.

  Here, the video processing LSI 35 includes the television video signal processing unit 34 that adjusts the television video data. However, instead of the television video signal processing unit 34, a common type that can adjust input signals of a plurality of types is used. The designed video signal processing unit may be used. By adopting a configuration including a video signal processing unit that can adjust a plurality of input signals, for example, a multi-use display that can display a navigation video when connected to a navigation main body and a TV video when connected to a TV tuner. It can be a device.

  In the above description, the display devices 10 and 33 are operated using the remote controller 15 as an input interface. However, the display devices 10 and 33 may be operated by input means other than the remote controller 15. For example, input may be performed using operation buttons provided on the display devices 10 and 33, or the display panel 12 may be input as a touch panel.

  The display device 10 described with reference to FIG. 2 and the display device 33 described with reference to FIG. 7 are configured to generate OSD video data and control the mixture ratio information by a single display device. In conjunction with the system, generation of OSD video data and control of mixing ratio information may be performed.

  FIG. 9 is a configuration diagram of the display device 16 according to the first embodiment configured to generate OSD data in conjunction with the navigation main body. The same reference numerals are used for the same components as those of the display device 10 shown in FIG.

  In the configuration of the car navigation system shown in FIG. 1, the display device 16 shown in FIG. 9 is connected instead of the display device 10.

  In the display device 10 of FIG. 2, the microcomputer 13 generates OSD video data based on the received signal from the remote controller 15, whereas in the display device 16 shown in FIG. 9, the microcomputer 17 is the CPU 62 of the navigation body 60. OSD video data for mixed display on the display panel 12 is generated based on the OSD setting information received from.

  The operation of the two video mixing process in the display device 16 will be described below. Here, a different part from the case where the display apparatus 10 is used is demonstrated.

  The microcomputer 17 creates OSD video data to be mixed and displayed on the navigation video data input to the display device 16 according to the OSD setting information input from the CPU 62 of the navigation body 60 via the external bus 61, The created OSD video data is output to the video input terminal 25 in synchronization with the synchronization signal input from the video processing LSI 11. Further, the microcomputer 17 generates and outputs, for each pixel, mixing ratio data for mixing the output OSD video data with the navigation video data in synchronization with the synchronization signal input from the video processing LSI 11.

  Here, the microcomputer 17 has a mixing ratio data calculation formula corresponding to each mixing ratio data setting pattern. When receiving the pattern type information included in the OSD setting information received from the CPU 62, the microcomputer 17 corresponds to the pattern type information. Using the mixture ratio data calculation formula, the mixture ratio data for each pixel is calculated and output. Here, the pattern type and the mixture ratio data setting pattern are as shown in FIG. 3, for example.

  The method for generating the mixture ratio data in the microcomputer 17 is the same as the method for generating the mixture ratio data in the microcomputer 13 of the display device 10 described with reference to FIGS. 3 and 4, for example. In this case, the OSD setting information received from the CPU 62 by the microcomputer 17 corresponds to an example of a display instruction input from the input interface according to the present invention.

  Here, the processing in the OSD video signal processing unit 20 and the processing in the navigation video signal processing unit 21 are adjusted by the OSD video signal processing unit 20 and output, and adjusted by the navigation video signal processing unit 21. It is set to synchronize with the output navigation video data. Therefore, the OSD video data adjusted by the OSD video signal processing unit 20 and the navigation video data adjusted by the navigation video signal processing unit 21 are input to the mixing processing unit 22 in synchronization.

  On the other hand, the mixture ratio data output from the microcomputer 17 is input to the mixture ratio information input terminal 29 of the video processing LSI 11. Since the mixing ratio data input to the mixing ratio information input terminal 29 is generated in synchronization with the synchronization signal input to the microcomputer 17, the mixing ratio data is synchronized with the navigation video data input to the video input terminal 26.

  The delay circuit 24 mixes the mixture ratio data input to the mixture ratio information input terminal 29 after the navigation video data is input to the video input terminal 26, and is adjusted by the navigation video signal processing unit 21 before being output, Delay. As a result, the navigation processing unit 22 receives the navigation video data output from the navigation video signal processing unit 21, the OSD video data output from the OSD video signal processing unit 20, and the mixing ratio data output from the delay circuit 24. Input synchronously.

  The mixing processing unit 22 performs alpha blend composition processing of navigation video data and OSD video data using the mixing ratio data for each pixel using these data input in synchronization with each pixel, and the mixing The processed video data is output from the video output terminal 27.

  Then, video data in which navigation video data and OSD video data are mixed for each pixel is input to the display panel 12 and displayed.

  Next, FIG. 10 shows a configuration diagram of a display device 30 having still another configuration according to the first embodiment. The same reference numerals are used for the same components as those of the display device 10 shown in FIG.

  The display device 10 described with reference to FIG. 2 outputs the mixture ratio data from the microcomputer 13, whereas the display device 30 outputs the quasi-mixture ratio data from the microcomputer 18, and the video processing LSI 31. The difference is that a mixing ratio data value calculation circuit 32 is provided.

  In FIG. 10, the quasi-mixing ratio data output from the microcomputer 18 is data that can calculate the mixing ratio data (α value). The mixing ratio data in FIG. 2 is 8-bit data, whereas the quasi-mixing ratio data in FIG. 10 is 3-bit data.

  The mixing ratio data value calculation circuit 32 converts the 3-bit quasi-mixing ratio data input to the mixing ratio information input terminal 29 into 8-bit mixing ratio data and inputs it to the mixing processing unit 22.

  FIG. 11 shows a specific example of the mixing ratio table showing the correspondence between the quasi-mixing ratio data and the mixing ratio data.

  Since the mixing ratio data input to the mixing processing unit 22 is 8 bits, the range of 0 ≦ α ≦ 1.0 can be set in 256 stages. On the other hand, since the quasi-mixing ratio data is 3 bits, eight types of α values can be selected from the range of 0 ≦ α ≦ 1.0.

  Since the mixing ratio data actually input to the mixing processing unit 22 is 8-bit data, it is an integer value in the range of 0 to 255. In the display device 30 of FIG. 10, eight values are assigned as quasi-mixing ratios from the range of integer values, and the quasi-mixing ratio values are used instead of the mixing ratio data as the mixing ratio information input terminal 29 of the video processing LSI 31. To enter.

  In the case of the specific example of FIG. 11, for example, the value α ′ = 117 of the mixing ratio data actually input to the mixing processing unit 22 is assigned to the quasi-mixing ratio data value = 3. Therefore, in this case, when quasi-mixing ratio data = 3 is input to the mixing ratio information input terminal 29, the mixing ratio data value calculation circuit 32 converts it to mixing ratio data α ′ = 117 and Entered. As a result, at this time, an α blend is synthesized with an α value = 0.46.

  Although only eight types of quasi-mixing ratio data can be set, each of the eight types of setting values can be set from finely divided ranges of 0 ≦ α ′ ≦ 1.0 into 256 steps.

  In this case, the mixing ratio data value calculation circuit 32 may have eight α ′ values corresponding to the quasi-mixing ratio data values as a mixing ratio table. That is, in this case, it is possible to cope with this by simply securing 8 bytes as the mixing ratio table.

  In the case of the configuration of FIG. 2, since the microcomputer 13 outputs 8-bit mixing ratio data, the degree of transparency for each pixel can be set finely. For example, when the microcomputer 13 and the video processing LSI 11 are connected by a parallel signal. In order to transmit the mixture ratio data, the microcomputer 13 and the video processing LSI 11 each require eight input / output ports.

  On the other hand, in the configuration of FIG. 10, the quasi-mixing ratio data output from the microcomputer 18 is 3 bits. Therefore, when the microcomputer 18 and the video processing LSI 31 are connected by a parallel signal, the quasi-mixing ratio data is transmitted. In addition, only three input / output ports of the microcomputer 18 and the video processing LSI 31 need be used.

  If each of the microcomputer and the video processing LSI has sufficient ports that can be used for transmission of the mixture ratio data, the configuration shown in FIG. 2 may be used. However, there are ports that can be used for transmission of the mixture ratio data. If it is limited, the configuration shown in FIG. 10 may be used.

  In the first embodiment, the quasi-mixing ratio data is described as 3 bits in the configuration of FIG. 10, but other numbers of bits may be used. For example, when there are only two ports that can be used for transmission of mixing ratio data, four types of semi-mixing ratio data may be transmitted as two bits. Also, it may be 4 bits or more. The greater the number of bits used as quasi-mixing ratio data, the finer the degree of transparency for each pixel can be set.

  In the configuration of FIG. 10 of the first embodiment, the conversion from the quasi-mixing ratio data to the mixing ratio data is performed by the mixing ratio data value calculation circuit 32. However, the mixing ratio as shown in FIG. A table may be provided in the mixing processing unit 22, and the quasi-mixing ratio data may be directly input to the mixing processing unit 22, and the quasi-mixing ratio data may be converted into the mixing ratio data in the mixing processing unit 22.

  Further, in the configuration of FIG. 10 of the first embodiment, the conversion from the quasi-mixing ratio data to the mixing ratio data has been described using the example using the mixing ratio table shown in FIG. You may make it convert from mixing ratio data into mixing ratio data.

  Further, in the configuration of FIG. 10 of the first embodiment, the quasi-mixing ratio data input to the mixing ratio information input terminal 29 is converted by the mixing ratio data value calculation circuit 32 after the delay circuit 24. However, the mixture ratio data value calculation circuit 32 may first convert the quasi-mixture ratio data into the mixture ratio data, and then the delay circuit 24 may delay the data. It is only necessary that the mixing ratio data input to the mixing processing unit 22 is synchronized with the navigation video data input from the navigation video signal processing unit 21 to the mixing processing unit 22.

  2 and 9, both the mixing ratio data input from the microcomputers 13 and 17 to the video processing LSI 11 and the quasi-mixing ratio data input from the microcomputer 18 to the video processing LSI 31 in FIG. 10 are transmitted as parallel signals. Alternatively, it may be transmitted as a serial signal. When transmitting in parallel signals, a plurality of ports (terminals) are used as the mixing ratio information input terminal 29.

  In the first embodiment, the video processing LSIs 11 and 31 are provided with the delay circuit 24. Instead of providing the delay circuit 24, the mixing ratio data or the quasi-mixing ratio data output from the microcomputer 13 is delayed. You may make it output. It is sufficient that the mixing ratio data input to the mixing processing unit 22 can be synchronized with the navigation video data input from the navigation video signal processing unit 21 to the mixing processing unit 22. It may be possible to deal with it, or it may be delayed on the microcomputer 13 side.

(Embodiment 2)
FIG. 12 shows a configuration diagram of the display device 40 according to the second embodiment of the present invention. The same reference numerals are used for the same components as those of the display device 10 according to the first embodiment shown in FIG.

  The car navigation system according to the second embodiment includes a display device 40 instead of the display device 10 in the car navigation system having the configuration shown in FIG.

  The configuration and operation of the display device 40 according to the second embodiment will be described with reference to FIG. 1, FIG. 12, and FIG.

  In the car navigation system of the second embodiment, the CPU 62 of the navigation main body 60 causes the navigation drawing processing unit 66 to create a plurality of navigation video data to be mixed and displayed, and the navigation video data thus created is generated. And transmitted to the display device 40 via the external bus 61.

  FIG. 13B shows a display example in which a plurality of navigation video data is mixed and displayed on the display panel 12 of the display device 40.

  In FIG. 13B, four types of navigation video data are mixed and displayed. In this case, a navigation GUI, which is a map display including the vehicle position, includes a navigation GUI for operating the navigation screen, a command GUI for performing command operations other than navigation, and a music player GUI indicating the operation of the music player. Two navigation video data are mixed and displayed.

  Next, the configuration of the display device 40 according to the second embodiment will be described with reference to FIG. Here, a different part from the display apparatus 10 of Embodiment 1 shown in FIG. 2 is demonstrated.

  The video processing LSI 41 includes a first navigation video signal processing unit 43, a second navigation video signal processing unit 44, a mixing processing unit 22, a synchronization signal generation unit 23, and a delay circuit 24. The video processing LSI 41 includes video input terminals 25 and 26, a video output terminal 27, a synchronization signal output terminal 28, and a mixing ratio information input terminal 29.

  The first navigation video data output from the navigation main body 60 is input to the video input terminal 25 of the video processing LSI 41 via the external bus 61, and the second navigation output from the navigation main body 60 is input to the video input terminal 26. Video data is input via the external bus 61.

  Here, the first navigation video data and the second navigation video data input to the video input terminals 25 and 26 are color video data in which each pixel data is composed of three primary color data of red, blue, and green, It is assumed that each primary color data is 24-bit data consisting of 8 bits.

  The first navigation video signal processing unit 43 converts YUV signals into RGB signals for the first navigation video data input to the video input terminal 25, and also performs gamma correction, contrast adjustment, brightness adjustment, and external light luminance adjustment. Etc. and output. In addition to these adjustments, the first navigation video signal processing unit 43 also performs processing for enlarging or reducing the image size of the input first navigation video data in accordance with an instruction from the microcomputer 42.

  Similarly, the second navigation video signal processing unit 44 converts a YUV signal into an RGB signal for the second navigation video data input to the video input terminal 26, and also performs gamma correction, contrast adjustment, bright adjustment, and external adjustment. Adjust light intensity and output. In addition to these adjustments, the second navigation video signal processing unit 44 also performs processing for enlarging or reducing the image size of the input second navigation video data in accordance with an instruction from the microcomputer 42.

  Since the first navigation video data and the second navigation video data are output from the navigation main body 60 in synchronization, when the video data is input to the video input terminal 25 and the video input terminal 26, these video data are synchronized. Yes.

  The processing in the first navigation video signal processing unit 43 and the processing in the second navigation video signal processing unit 44 are the first navigation video data adjusted and output by the first navigation video signal processing unit 43, and the second navigation The second navigation video data adjusted and output by the video signal processing unit 44 is set to be synchronized. Therefore, the first navigation video data adjusted by the first navigation video signal processing unit 43 and the second navigation video data adjusted by the second navigation video signal processing unit 44 are input to the mixing processing unit 22 in synchronization. Is done.

  The synchronization signal generator 23 generates a synchronization signal for synchronizing with the second navigation video signal input to the video input terminal 26, and outputs it from the synchronization signal output terminal 28.

  The microcomputer 42 mixes and displays the first navigation video data and the second navigation video data input to the display device 40 in accordance with the mixing setting information input from the CPU 62 of the navigation body 60 via the external bus 61. Are generated and output for each pixel.

  Here, the mixture ratio data output from the microcomputer 42 is an α value used for the α blend composition processing set for each pixel. Here, the α value set for each pixel is 8 bits. A method of generating the mixture ratio data in the microcomputer 42 at this time will be described later.

  The mixture ratio data output from the microcomputer 42 is input to the mixture ratio information input terminal 29 of the video processing LSI 41. Since the mixing ratio data input to the mixing ratio information input terminal 29 is generated in synchronization with the synchronization signal input to the microcomputer 42, it is synchronized with the second navigation video data input to the video input terminal 26. .

  The delay circuit 24 adjusts and outputs the mixing ratio data input to the mixing ratio information input terminal 29 after the second navigation video data is input to the video input terminal 26 and then adjusted by the second navigation video signal processing unit 44. Delay for the amount of time. As a result, the mixing processing unit 22 includes the first navigation video data output from the first navigation video signal processing unit 43, the second navigation video data output from the second navigation video signal processing unit 44, and the delay circuit 24. The mixture ratio data output from is input in synchronization.

  The mixing processing unit 22 performs alpha blend composition processing of the first navigation video data and the second navigation video data using the mixing ratio data for each pixel using these data input in synchronization with each pixel. The mixed video data is output from the video output terminal 27.

  Then, video data obtained by mixing the first navigation video data and the second navigation video data for each pixel is input to the display panel 12 and displayed.

  Next, a method for generating the mixture ratio data in the microcomputer 42 will be described.

  In the display device 40 according to the second embodiment, a mixture ratio data setting pattern (a combination setting pattern of α values set for each pixel) is determined in advance for each mixed image type.

  Here, the first navigation video data input to the video input terminal 25 is used as navigation video data for map display, and the second navigation video data input to the video input terminal 26 is used as video data other than the navigation video. Will be described. Here, “mixed image type” refers to the type of second navigation video data to be mixed with the first navigation video data.

  The microcomputer 42 includes a mixing ratio data calculation formula for calculating the mixing ratio data of the mixing ratio data setting pattern associated with the mixing image type, and the mixing image type included in the mixing setting information received from the CPU 62 The mixing ratio data is calculated using the corresponding mixing ratio data calculation formula.

  FIG. 13A shows a specific example of the mixture ratio data setting pattern associated with the mixed image type. FIG. 13B shows a display example in which a plurality of navigation video data is mixed and displayed on the display panel 12 of the display device 40.

  In the case of the specific example shown in FIG. 13A, the mixture ratio data setting pattern includes an element of temporal change of the mixture ratio data.

  For example, a case where the video data of the command GUI is mixed with the navigation video and displayed will be described. In this case, navigation video data is input to the video input terminal 25 as first navigation video data, and video data of a command GUI is input to the video input terminal 26 as second navigation video data. 42, mixed setting information including information for displaying the command GUI is input from the CPU 62. At this time, the mixture setting information input from the CPU 62 includes information on a display range for creating the mixture ratio data.

  The microcomputer 42 generates and outputs the mixture ratio data corresponding to the command GUI for each pixel while changing with time, using a calculation formula for generating the mixture ratio data setting pattern of the command GUI.

  As a result, from the state in which the navigation video is displayed on the display panel 12, the display of the command GUI gradually appears darker and is finally displayed on the navigation video with a transparency of α value = 0.5. The command GUI is displayed translucently.

  Further, when the video data of the music player GUI of FIG. 13A is mixed, it is set so that the speed at which the mixing ratio data changes is changed depending on the pixel. In the case of the mixture ratio data setting pattern shown in FIG. 13A, the navigation video is displayed on the display panel 12 so that the left portion of the video data of the music player GUI appears first. Finally, the music player GUI is displayed in a translucent manner on the navigation video with a transparency of α value = 0.8.

  In the display example of FIG. 13B, four navigation video data are mixed and displayed. In this case, two sets of configurations similar to those of the video input terminal 25 and the first navigation video signal processing unit 43 shown in FIG. 12 are provided in the video processing LSI 41.

  In the second embodiment, as shown in FIG. 13A, the mixing ratio data setting pattern has been described as being associated with the mixed image type. However, as in the first embodiment described with reference to FIG. The ratio data setting pattern may be set in association with the pattern type.

  In the above description, the display range in which the microcomputer 42 creates the mixture ratio data is included in the mixture setting information input from the CPU 62 and is input to the microcomputer 42. However, the second display range is input to the video input terminal 26. The navigation video data may be input to the microcomputer 42, and the microcomputer 42 may determine a display range in which the mixture ratio data is created from the second navigation video data.

  In the above description, the synchronization signal generation unit 23 generates the synchronization signal from the second navigation video signal input to the video input terminal 26, but from the first navigation video signal input to the video input terminal 25. A synchronization signal may be generated and output from the synchronization signal output terminal 28.

  Further, in the second embodiment, the configuration in which the microcomputer 42 generates the mixing ratio data in conjunction with the navigation main body 62 has been described. However, the mixing ratio is based on the mixing setting information received by the microcomputer 42 from the CPU 62 of the navigation main body 62. Instead of generating data, a configuration may be adopted in which the mixture ratio data is generated by the display device 40 alone, such as the display device 10 shown in FIG.

  In this case, for example, as in the display device 10 of FIG. 2, the mixing ratio data setting pattern output from the microcomputer 42 is associated with an input signal received from an input interface such as a remote controller, and the microcomputer 42 receives from the remote controller. What is necessary is just to produce | generate and output the mixture ratio data for every pixel corresponding to an input signal.

  Further, as the microcomputer 42 of the second embodiment, a microcomputer having an OSD data generation function may be used.

(Embodiment 3)
In FIG. 14, the block diagram of the display apparatus 50 of Embodiment 3 of this invention is shown. The same reference numerals are used for the same components as those of the display device 10 according to the first embodiment shown in FIG.

  The car navigation system according to the third embodiment includes a display device 50 instead of the display device 10 in the car navigation system having the configuration shown in FIG.

  The configuration and operation of the display device 50 according to the third embodiment will be described with reference to FIGS. 1 and 14. Here, a different part from the display apparatus 10 of Embodiment 1 shown in FIG. 2 is demonstrated.

  In addition to the configuration of the display device 10 of the first embodiment shown in FIG. 2, the display device 50 of the third embodiment has a television video signal processing unit 54, a synchronization buffer 55, a video input terminal 56, and combination information. An input terminal 57 is provided. The video signal adjusted by the television video signal processing unit 54 is also input to the mixing processing unit 53.

  In the third embodiment, the video input terminals 26 and 56 are examples of the first and second video input terminals of the present invention, and the video input terminal 25 is the third video input terminal of the present invention. An example. The navigation video signal processing unit 21 and the television video signal processing unit 54 are examples of the first and second video signal processing units of the present invention, and the OSD video signal processing unit 20 is the third video signal of the present invention. This is an example of a processing unit.

  The TV video data output from the TV tuner is input to the video input terminal 56 of the video processing LSI 51 as an NTSC signal.

  The TV video signal processing unit 54 receives TV video data input to the video input terminal 56, demodulates and converts the TV video data into RGB signals, performs signal processing, and outputs the signals.

  The synchronization buffer 55 inputs the television video data demodulated and converted by the television video signal processing unit 54 to the mixing processing unit 53 in synchronization with the navigation video data signal-processed and output by the navigation video signal processing unit 21. This is a buffer provided for this purpose.

  Here, the processing in the OSD video signal processing unit 20, the processing in the navigation video signal processing unit 21, and the processing in the television video signal processing unit 54 are the OSD video data adjusted and output by the OSD video signal processing unit 20, and The navigation video data adjusted and output by the navigation video signal processing unit 21 and the television video data adjusted and output by the synchronization buffer 55 are set to be synchronized.

  The microcomputer 52 has a function of generating OSD video data, similarly to the microcomputer 13 shown in FIG.

  In the display device 50 according to the third embodiment, a combination of OSD video data output from the microcomputer 52 and video data to be mixed by the mixing processing unit 53 of the video processing LSI 51 in accordance with a signal received by the infrared light receiving unit 14 from the remote controller 15. The mixing ratio data setting pattern used when mixing the video data is determined in advance, and the related information is held in the memory in the microcomputer 52.

  When the microcomputer 52 receives the signal received by the infrared light receiver 14 from the remote controller 15, the microcomputer 52 generates and outputs OSD video data corresponding to the signal, and a combination of video data to be mixed by the mixing processor 53 of the video processing LSI 51. Information is input to the combination information input terminal 57 of the video processing LSI 51 and notified to the mixing processing unit 53.

  Since the mixing ratio data input to the mixing ratio information input terminal 29 is delayed by the delay circuit 24, the mixing processing unit 53 has the navigation video data output from the navigation video signal processing unit 21 and the OSD video signal processing unit 20. The OSD video data output from, the TV video data output from the synchronization buffer 55, and the mixing ratio data output from the delay circuit 24 are input in synchronization.

  The mixing processing unit 53 performs α blend synthesis processing using the mixing ratio data for each pixel using these data input in synchronization with each pixel in accordance with the mixing combination information notified from the microcomputer 52. The mixed video data is output from the video output terminal 27.

  For example, when a combination of navigation video data and OSD video data is set in the mixed combination information, the OSD video data is mixed into the navigation video data using a mixing ratio data setting pattern corresponding to the combination. When video data is output from the video output terminal 27 and a combination of television video data and OSD video data is set, the OSD video data uses a mixture ratio data setting pattern corresponding to the combination of the television video data. The mixed video data is output from the video output terminal 27.

  Then, the video data output from the video output terminal 27 is input to the display panel 12 and displayed.

  As the related information stored in the memory in the microcomputer 52 in association with the signal received by the infrared light receiving unit 14, for example, the end of the screen of the display panel 12 is associated with the “instruction to switch from the navigation video screen to the TV video screen” signal. A mixture ratio data setting pattern that gradually changes from the navigation video screen to the TV video screen is set, or an "instruction to reduce and display the TV video in a part of the navigation video screen" signal Corresponding to the above, it is possible to set a mixture ratio data setting pattern in which the navigation video portion is displayed translucently so that the navigation video portion can be seen through from the television video portion superimposed on the navigation screen. When the microcomputer 52 receives an “instruction to reduce and display a TV image in a partial area in the navigation image screen” signal, the microcomputer 52 determines the image size of the TV image data to the TV image signal processing unit 54. An instruction to perform reduction processing is also issued.

  In the third embodiment, the synchronization buffer 55 is provided between the television video signal processing unit 54 and the mixing processing unit 53. However, the synchronization buffer 55 is connected to the video input terminal 56 and the television video signal processing unit 54. The TV video data output from the TV video signal processing unit 54 may be synchronized with the navigation video data.

  In addition, a synchronization buffer is provided between the navigation video signal processing unit 21 and the mixing processing unit 53 or between the navigation video signal processing unit 21 and the video input terminal 26, and navigation video data output from the navigation video signal processing unit 21. May be synchronized with the television video data output from the television video signal processing unit 54. In this case, the OSD video data output from the microcomputer 52 can be synchronized by transmitting a synchronization signal generated from the television video signal as the synchronization signal transmitted from the synchronization signal output terminal 28 to the microcomputer 52.

  In addition, a synchronization buffer is provided in each of the TV video signal processing unit 54, the navigation video signal processing unit 21, and the OSD video signal processing unit 20, and a signal that does not need to be synchronized is passed through the synchronization buffer. Such a configuration may be adopted.

  Further, in the third embodiment, it has been described that television video data is input to the video input terminal 56. However, other video data, for example, video data reproduced on a DVD or video camera is used. Video data or the like may be input.

  In each embodiment, the YUV signal is input to the video processing LSI as the navigation video data and the NTSC composite signal is input as the TV video data. However, the navigation video data includes NTSC, PAL, SECAM, and the like. A composite video signal or RGB signal may be input, or a composite video signal other than NTSC, a YUV signal, an RGB signal, or the like may be input as television video data.

  In each of the embodiments, two types or three types of video data have been described as being input to the video processing LSI. However, a video signal processing unit is further provided in the video processing LSI to provide four or more types of video data. May be input.

  In each embodiment, the α blend composition process has been described as an example of the mixing process. However, a mixing process other than the α blend composition process may be used as long as a plurality of images are mixed for each pixel. .

  In each embodiment, an example of a video processing device of the present invention has been described using a video processing LSI. However, a video processing device other than an LSI may be used. For example, the configuration of the video processing LSI used in each embodiment may be realized by a circuit to which a CPU, a memory, and the like are connected.

  As described above, the video processing device, video processing LSI, and display device of the present invention control the mixing ratio of a plurality of input video data in units of pixels without requiring a frame memory for the mixing ratio data. Can be mixed and output.

  The display device according to the present invention includes a frame memory for mixing ratio data from a configuration of a display device that mixes a plurality of input video data by controlling the mixing ratio in units of pixels using a conventional frame memory for mixing ratio data. With the deleted configuration, it can be handled without adding new parts.

  Note that the program of the present invention provides the mixing ratio information corresponding to a combination of the first video data and the second video data in accordance with a display instruction input from an input interface in the above-described mixing ratio information generation method. A program for causing a computer to execute the operations of the mixture ratio information pattern acquisition step of acquiring a pattern, and the mixture ratio information calculation step of calculating the mixture ratio information for each pixel based on the acquired mixture ratio information pattern It is a program that operates in cooperation with a computer.

  Further, the recording medium of the present invention provides the mixing ratio corresponding to a combination of the first video data and the second video data according to the display instruction input from the input interface of the above-described mixing ratio information generation method. For causing the computer to execute operations of the mixture ratio information pattern acquisition step of acquiring an information pattern and the mixture ratio information calculation step of calculating the mixture ratio information for each pixel based on the acquired mixture ratio information pattern A recording medium that records a program, is a recording medium that can be read by a computer, and the read program is used in cooperation with the computer.

  The “step operation” of the present invention means the operation of all or part of the step.

  Further, one usage form of the program of the present invention may be an aspect in which the program is recorded on a recording medium such as a ROM readable by a computer and operates in cooperation with the computer.

  Further, one use form of the program of the present invention may be an aspect in which the program is transmitted through a transmission medium such as the Internet or a transmission medium such as light / radio wave, read by a computer, and operates in cooperation with the computer. .

  The computer of the present invention described above is not limited to pure hardware such as a CPU, and may include firmware, an OS, and peripheral devices.

  As described above, the configuration of the present invention may be realized as software or hardware.

  In each embodiment, the car navigation system has been described as an example. However, the present invention can be applied to a display system other than the car navigation system as long as the display device is used.

  A video processing device, a video processing LSI, a display device, a car navigation system, a mixing ratio information generation method, and the like according to the present invention do not require a frame memory for mixing ratio data, and can input a plurality of input video data in units of pixels. It is effective as a video processing device, a video processing LSI, a display device, a car navigation system, a mixing ratio information generation method, and the like capable of mixing a plurality of input video data by controlling the mixing ratio.

1 is a configuration diagram of a car navigation system according to a first embodiment of the present invention. 1 is a configuration diagram of a display device according to a first embodiment of the present invention. The figure which shows the specific example of several mixing ratio data setting pattern classification set to the microcomputer for control of Embodiment 1 of this invention The figure which shows the processing flow at the time of the microcomputer for control of Embodiment 1 of this invention producing | generating the mixture ratio data for every pixel. The figure which shows the example of a display which mixed and displayed the OSD image | video with the navigation image | video on the display apparatus of Embodiment 1 of this invention. The figure which shows the example of a partial enlarged display of a screen at the time of making the mixing ratio data setting pattern correspond with a font and image information in the display apparatus of Embodiment 1 of this invention. 1 is a configuration diagram of a display device connected to a television tuner according to Embodiment 1 of the present invention. The figure which shows the example of a display which mixed and displayed the OSD image | video on the television image on the display apparatus of Embodiment 1 of this invention. Configuration diagram of a display device configured to generate OSD data in conjunction with a navigation main body according to Embodiment 1 of the present invention. The block diagram of the display apparatus of the other structure of Embodiment 1 of this invention The figure which shows the specific example of the mixing ratio table which shows the correspondence of quasi-mixing ratio data and mixing ratio data in Embodiment 1 of this invention. Configuration diagram of a display device according to a second embodiment of the present invention (A) In the display device according to the second embodiment of the present invention, a diagram showing a specific example of the mixture ratio data setting pattern associated with the mixed image type, (b) a display example by the display device according to the second embodiment of the present invention. Illustration Configuration diagram of display device according to embodiment 3 of the present invention Configuration diagram of a conventional car navigation system equipped with a display device having a 2-video α blend composition function Explanatory drawing of alpha blend composition processing method in conventional video processing LSI Explanatory drawing of other α blend composition processing method in conventional video processing LSI

Explanation of symbols

10, 16, 30, 33, 40, 50 Display device 11, 31, 35, 41, 51 Video processing LSI
DESCRIPTION OF SYMBOLS 12 Display panel 13, 17, 42, 52 Microcomputer 14 Infrared light-receiving part 15 Remote control 20 OSD video signal processing part 21 Navigation video signal processing part 22, 53 Mixing processing part 23 Synchronization signal generation part 24 Delay circuit 25, 26, 56 Video input Terminal 27 Video output terminal 28 Synchronization signal output terminal 29 Mixing ratio information input terminal 32 Mixing ratio data value calculation circuit 43 First navigation video signal processing unit 44 Second navigation video signal processing unit 34, 54 TV video signal processing unit 55 For synchronization Buffer 57 Combination information input terminal 60 Navigation body 61 External bus 62 CPU
63 Operation unit 64 Sensor 65 Storage unit 66 Navigation drawing processing unit

Claims (17)

A first video input terminal for inputting first video data;
A second video input terminal for inputting second video data;
Generate mixing ratio information for each pixel, which is mixing ratio data or quasi-mixing ratio data for calculating the mixing ratio data for mixing the first video data and the second video data in units of pixels. A mixing ratio information input terminal for inputting the mixing ratio information from an external mixing ratio information output unit that outputs
A first video signal processing unit that adjusts and outputs the first video data input to the first video input terminal;
A second video signal processing unit that adjusts and outputs the second video data input to the second video input terminal;
Using the mixture ratio data calculated from the quasi-mixture ratio data input to the mixture ratio information input terminal or the mixture ratio data input to the mixture ratio information input terminal, the first video is displayed for each pixel. A mixing processing unit that mixes and outputs the first video data adjusted by the signal processing unit and the second video data adjusted by the second video signal processing unit;
The video processing device, wherein the mixing ratio data, the adjusted first video data, and the adjusted second video data input to the mixing processing unit are synchronized.   When the mixing ratio information input to the mixing ratio information input terminal is the quasi-mixing ratio data, the mixing ratio data is transferred from the quasi-mixing ratio data between the mixing ratio information input terminal and the mixing processing unit. The video processing device according to claim 1, further comprising a mixing ratio data calculation circuit for calculating. The quasi-mixing ratio data is index information for selecting the mixing ratio data,
A mixing ratio table that associates the quasi-mixing ratio data with the mixing ratio data;
The video processing device according to claim 2, wherein the mixing ratio data calculation circuit calculates the mixing ratio data from the quasi-mixing ratio data for each pixel using the mixing ratio table. A synchronization signal output terminal for outputting a synchronization signal for synchronizing the signal of the mixing ratio information to the second video data input to the second video input terminal;
The mixing ratio information output unit receives the synchronization signal output from the synchronization signal output terminal, and outputs the mixing ratio information in synchronization with the synchronization signal. Video processing device.   5. The video data generation device according to claim 4, wherein the mixing ratio information output unit is a video data generation device that outputs the first video data input to the first video input terminal in synchronization with the input synchronization signal. Video processing device.   The video processing device according to claim 5, wherein the first video data is OSD video data.   The video processing device according to claim 6, wherein the second video data is video data for car navigation or video data for television.   A delay circuit for synchronizing the mixing ratio data input to the mixing processing unit with the adjusted first video data and the adjusted second video data includes: the mixing ratio information input terminal; The video processing device according to claim 1, which is provided between the mixing processing unit and the video processing device. A third video input terminal for inputting OSD video data;
A third video signal processor that adjusts and outputs the OSD video data input to the third video input terminal;
A combination information input terminal for inputting combination information indicating which video data is to be mixed from the mixing ratio information output unit;
One of the first video data and the second video data is video data for car navigation, and the other is video data for television.
The mixing ratio information output unit outputs the OSD video data in synchronization with the input synchronization signal,
The mixing processing unit includes the first video data adjusted by the first video signal processing unit, the second video data adjusted by the second video signal processing unit, and the third video. The video processing device according to claim 4, wherein the video data selected by the combination information among the OSD video data adjusted by a signal processing unit is mixed for each pixel using the mixing ratio data. There are a plurality of the mixture ratio information input terminals,
The video processing device according to claim 1, wherein the mixing ratio data or the quasi-mixing ratio data is input as parallel data to the plurality of mixing ratio information input terminals.   The video processing device according to claim 1, wherein the mixing ratio data or the quasi-mixing ratio data is input as serial data to the mixing ratio information input terminal.   A video processing LSI comprising the video processing device according to claim 1. The video processing device according to any one of claims 1 to 11,
A microcomputer that operates as the mixing ratio information output unit and controls the operation of the video processing device;
And a display panel for displaying video data output from the video processing device. A display device according to claim 13;
A car navigation system that generates and outputs video data for car navigation,
A car navigation system equipped with a TV tuner that outputs video data for TV. The display device according to claim 13, wherein the microcomputer generates the mixing ratio information.
In correspondence with the combination of the first video data and the second video data input to the video processing device, a mixture ratio information pattern for a region to be mixed is determined in advance,
A mixing ratio information pattern acquisition step for acquiring the mixing ratio information pattern corresponding to a combination of the first video data and the second video data in response to a display instruction input from an input interface;
A mixture ratio information generation method comprising: a mixture ratio information calculation step of calculating the mixture ratio information for each pixel based on the acquired mixture ratio information pattern.   16. The mixing ratio information generation method according to claim 15, wherein the mixing ratio information pattern corresponding to a combination of the first video data and the second video data corresponding to a display instruction input from an input interface is acquired. A program that causes a computer to execute the mixture ratio information pattern acquisition step and the mixture ratio information calculation step of calculating the mixture ratio information for each pixel based on the acquired mixture ratio information pattern.   A recording medium on which the program according to claim 16 is recorded, wherein the recording medium can be processed by a computer.