JP2006067003A - Wireless communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display an image stably while reducing burden of processing on a CPU when a display screen is presented on the display screen of a destination display. <P>SOLUTION: The wireless communication apparatus 100 comprises an application CPU 110, a memory 120, an LCD 130, a memory 140 only for a video output LSI, and the video output LSI 150. The application CPU 110 reads out image data (mainly still image) stored in the memory 120 and transfers image data read out from the memory 120 to a destination display, i.e. an LCD 130, and the video output LSI 150. Interpolation section 209 of the video output LSI 150 expands a transfer image up to the longitudinal 480 line on the television screen 302 of a television set 300 and expands/interpolates the lateral size of the transfer image with the same expansion rate as that of the longitudinal size of the transfer image. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless communication device such as a mobile phone device, and more particularly to a wireless communication device that displays image data input via an RGB bus or a CPU bus interface.

  2. Description of the Related Art Conventionally, in wireless communication devices such as mobile phone devices, a technique for establishing a user interface by outputting image data on a display screen of a display device such as an LCD (Liquid Crystal Display) has been realized. In this type of wireless communication apparatus, image data is output on a display screen that matches the size of the apparatus body, and therefore the ease of viewing and understanding the image depends on the display screen size.

  For this reason, in a wireless communication device with a small display screen size such as a mobile phone device, restrictions on the ease of viewing and understanding of the image have been forced.

2. Description of the Related Art Conventionally, a method for displaying an image output on the display screen of such a small wireless communication apparatus on a television screen so as to be easy to see and understand is known (see, for example, Patent Document 1 and Patent Document 2). ).
JP 2002-314646 A JP 2004-56653 A

  By the way, in the wireless communication device described in Patent Document 1 or Patent Document 2, a CPU (Central Processing Unit) converts image data input via an RGB bus or a CPU bus interface into a composite video signal and converts it into a television. It is conceivable to output to the device.

  However, the wireless communication apparatus having such a configuration has a problem that the processing load on the CPU increases and stable processing is hindered.

  For this reason, this type of wireless communication device establishes a user interface by outputting image data output on its own display screen to a display screen of a transfer destination display device such as a television device that is different from the existing display screen. In this case, it is desired to reduce the CPU load as much as possible and to display an image stably.

  The present invention has been made in view of the above points, and when displaying a display screen on a display screen of a transfer destination display device, wireless communication capable of reducing the processing burden on the CPU and stably displaying an image. An object is to provide an apparatus.

  In order to solve such a problem, a wireless communication apparatus of the present invention includes a transfer unit that transfers an image signal, a video signal output unit that converts the image signal transferred by the transfer unit into a composite video signal, and outputs the composite video signal. When the ratio of the vertical and horizontal sizes of the display screen of the transfer source display device transferred by the transfer means does not match the ratio of the vertical and horizontal sizes of the display screen of the transfer destination display device, the size of the display screen of the transfer destination display device is set. The transfer image is enlarged so as to correspond, and an interpolating means for enlarging and interpolating the horizontal size of the transfer image at the same enlargement ratio as the vertical size of the transfer image is adopted.

  According to the present invention, when image data output on a display screen is output on a display screen of a transfer destination display device to establish a user interface, the processing burden on the CPU can be reduced and the image can be stabilized. Can be displayed.

  Hereinafter, a wireless communication apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the component and equivalent part which have the same structure or function, and the description is not repeated.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a radio communication apparatus according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the wireless communication apparatus 100 according to the first embodiment includes an application CPU 110, a memory 120, an LCD 130, a video output LSI dedicated memory 140, and a video output LSI (Large Scale Integration) 150.

  In FIG. 1, the application CPU 110 reads image data (mainly still images) stored in the memory 120, and transfers the image data read from the memory 120 to the LCD 130 and the video output LSI 150 serving as a transfer source display device. To do.

  FIG. 2 is a block diagram showing a configuration of the video output LSI 150 of the wireless communication apparatus according to Embodiment 1 of the present invention.

  As shown in FIG. 2, the video output LSI 150 of the wireless communication apparatus 100 includes an external interface unit 201, an image conversion unit 202, an encoder unit 203, a DA conversion unit 204, a video amplifier unit 205, a timing generation unit 206, a control unit 207, A power supply unit 208, an interpolation unit 209, and a memory control unit 210 are included.

  In FIG. 2, image data and horizontal / vertical synchronization signals input from a CPU (LCD) bus from an external host processor (here, application CPU 110) are input to the external interface unit 201.

  The external interface unit 201 performs control and various settings for the control unit 207 based on various commands input from the application CPU 110 via commands on the CPU (LCD) bus.

  The image conversion unit 202 converts the image data input from the external interface unit 201 into a luminance signal and a color difference signal using a matrix circuit, and outputs the luminance signal and the color difference signal to the memory control unit 210.

  The memory control unit 210 outputs and writes the converted image data input from the image conversion unit 202 to the video output LSI dedicated memory 140.

  Further, the memory control unit 210 reads the image data written in the video output LSI dedicated memory 140 and outputs the image data to the interpolation unit 209. After the image data from the memory control unit 210 is input, the interpolation unit 209 performs enlargement processing (interpolation processing) corresponding to the screen size of the transfer destination display device, and outputs the image data to the encoder unit 203. To do.

  The encoder unit 203 restricts the transmission band of the color difference signal input from the interpolation unit 209 from the characteristic that human eyes do not perceive colors other than those near orange or flesh color when the screen is fine. Is subjected to carrier wave suppression quadrature two-phase modulation and multiplexed onto a luminance signal, and output to the DA converter 204 as a digital video signal.

  Here, in the enlargement process of the interpolation unit 209, it is necessary to enlarge the output image suitable for the display screen size of the wireless communication device 100 to the display screen size of a television device as a transfer destination display device.

  FIG. 3 is a diagram illustrating a relationship between the display screen size and the television output screen size of the wireless communication apparatus according to the first embodiment. In FIG. 3, the wireless communication device 100 is connected to a television device 300 via an AV cable 301. FIG. 3 shows a television output image when the aspect ratio of the LCD 130 of the wireless communication apparatus 100 does not match the aspect ratio of the television screen 302 of the television apparatus 300.

  As shown in FIG. 3, the interpolation unit 209 of the video output LSI 150 of the wireless communication apparatus 100 enlarges the transfer image up to 480 lines vertically on the television screen 302 of the television apparatus 300, and the same enlargement factor as the vertical size of the transfer image To enlarge the horizontal size of the transferred image.

  In the television apparatus 300, the ratio of the vertical size and the horizontal size of the television output image is 3: 4 for a normal one and 9:16 for a wide television. Therefore, for example, when a vertically long image such as a QVGA size of 320 vertical lines and 240 horizontal lines is enlarged to match the vertical 480 lines of the television screen 302, spaces (non-image areas) 303 are formed on the left and right sides of the television screen 302. it can. In wireless communication apparatus 100 according to the first embodiment, this space 303 is painted black.

  As described above, in wireless communication apparatus 100 according to the first embodiment, even when the display screen size of LCD 130 is long in the vertical direction, a transfer image that matches the ratio of the vertical and horizontal sizes of the display screen of LCD 130 is displayed on television screen 302. It can be displayed.

  In the wireless communication apparatus 100 according to the first embodiment, the interpolation unit 209 of the video output LSI 150 expands the image data to the vertical 480 lines of the television screen 302 of the television apparatus 300, and is the same as the vertical size of the image data. Since the horizontal size of the image data is enlarged and interpolated with the enlargement ratio, the processing load on the application CPU 110 can be reduced and the image can be displayed stably.

(Embodiment 2)
Next, a radio communication apparatus according to Embodiment 2 of the present invention will be described. The external interface unit 201 in the wireless communication apparatus 100 according to the first embodiment can receive various commands input from the application CPU 110 via commands on the CPU (LCD) bus.

  Therefore, in the wireless communication apparatus according to the second embodiment, among the various commands input from the application CPU 110, a command that can change the color and pattern of the space 303 shown in FIG. 3 is provided.

  Thereby, in the wireless communication apparatus according to the second embodiment, the interpolation unit 209 can change the color and design of the left and right spaces 303 on the television screen 302 in accordance with a command from the application CPU 110.

  Therefore, according to the wireless communication apparatus according to the second embodiment, the left and right spaces 303 of the television screen 302 can be simply set via a command on the application CPU (LCD) bus and without applying a load to the application CPU 110. The color and pattern can be changed.

(Embodiment 3)
Next, a radio communication apparatus according to Embodiment 3 of the present invention will be described. In the wireless communication apparatus 100 according to Embodiment 1, the interpolation unit 209 enlarges the image data to the vertical 480 lines of the television screen 302 of the television apparatus 300, and enlarges and interpolates the horizontal size at the same enlargement ratio as the vertical size. Thus, a larger transfer image can be output.

  However, a general television apparatus can display only a television output image having a vertical size of about 410 to 460 lines.

  For this reason, when an image suitable for the display screen size of the wireless communication device 100 as described above is output on the television screen of a general television device, it is displayed on the LCD 130 which is the display screen of the wireless communication device 100. There is a problem that a picture laid out at the edge of the screen such as an antenna protrudes outside the TV screen (hereinafter, this phenomenon is called “screen cut”).

  Therefore, in the wireless communication apparatus according to the third embodiment, among the various commands input from application CPU 110, a command that can change the enlargement magnification is provided.

  Thereby, in the wireless communication apparatus according to the third embodiment, the image size of the transfer image can be changed by the interpolation unit 209 in accordance with a command from the application CPU 110.

  Therefore, according to the wireless communication apparatus according to the third embodiment, it is possible to easily change the enlargement ratio of the transfer image by using a command on the CPU (LCD) bus without imposing a load on the application CPU 110. Thus, the problem of the screen cut can be solved.

(Embodiment 4)
Next, a radio communication apparatus according to Embodiment 4 of the present invention will be described. In the wireless communication apparatus according to the fourth embodiment, among the various commands input from application CPU 110, a command that can specify an area to be painted black is provided.

  As a result, in the wireless communication apparatus according to the fourth embodiment, the output area of the television screen 302 can be designated by the encoder unit 203 in accordance with a command from the application CPU 110. That is, in the wireless communication apparatus according to the fourth embodiment, the upper and lower tens lines of the TV screen 302 are simply blacked out without applying a load to the application CPU 110 only through a command on the CPU (LCD) bus. It becomes possible.

  Therefore, according to the wireless communication device according to the fourth embodiment, the problem is that important information (antenna and key assignment information) laid out on several tens of lines above and below the display screen, such as a mobile phone device, causes a screen cut. Can be eliminated.

(Embodiment 5)
Next, a radio communication apparatus according to Embodiment 5 of the present invention will be described. In the wireless communication apparatus according to the fifth embodiment, among various commands input from application CPU 110, a command that can specify the number of lines that can move the display position of the TV output image in the vertical and horizontal directions is provided.

  Thereby, in the wireless communication apparatus according to the fifth embodiment, the display position of the transfer image can be changed by the interpolation unit 209 in accordance with a command from the application CPU 110. In other words, in the moneyless communication device according to the fifth embodiment, the display position of the transfer image (TV output image) can be easily set only through a command on the CPU (LCD) bus and without imposing a load on the application CPU 110. It is possible to move several tens of lines up and down.

  Therefore, according to the wireless communication apparatus according to the fifth embodiment, the important information (antenna and key assignment information) laid out on several tens of lines above and below the display screen as in the mobile phone apparatus causes the screen to be cut off. Can be eliminated.

(Embodiment 6)
Next, a radio communication apparatus according to Embodiment 6 of the present invention will be described. The optimum enlargement ratio in the wireless communication apparatus according to Embodiment 3 and the optimum number of moving lines in the wireless communication apparatus according to Embodiment 5 are values that depend on the model of television apparatus 300.

  Therefore, in the wireless communication device according to the sixth embodiment, the screen size information according to the model of the television device 300 can be downloaded by simply specifying the product number of the television device 300 used by the user, Enables automatic setting of optimal parameter values such as the number of moving lines.

  Thereby, in the radio communication apparatus according to the sixth embodiment, the user manually adjusts the enlargement ratio in the radio communication apparatus according to the third embodiment and the number of moving lines in the radio communication apparatus according to the fifth embodiment. Even without this, it becomes possible to obtain an optimum value suitable for the television device 300 used by the user, and it is possible to output a television output image with the optimum enlargement ratio and the number of moving lines.

  The wireless communication device according to the present invention is useful as a wireless communication device such as a mobile phone device because the processing load of the CPU can be reduced and displayed stably when the display screen is displayed on the transfer destination display device. .

1 is a block diagram showing a configuration of a wireless communication apparatus according to Embodiment 1 of the present invention. 1 is a block diagram showing a configuration of a video output LSI of a wireless communication apparatus according to Embodiment 1 of the present invention. The figure which shows the relationship between the display screen size and television output screen size of the radio | wireless communication apparatus which concerns on Embodiment 1 of this invention.

Explanation of symbols

100 wireless communication device 110 application CPU
120 memory 130 LCD
140 Video output LSI dedicated memory 150 Video output LSI
DESCRIPTION OF SYMBOLS 201 External interface part 202 Image conversion part 203 Encoder part 204 DA conversion part 205 Video amplifier part 206 Timing generation part 207 Control part 208 Power supply part 209 Interpolation part 210 Memory control part 300 Television apparatus 301 AV cable 302 Television screen 303 Space

Claims (6)

Transfer means for transferring image signals;
Video signal output means for converting the image signal transferred by the transfer means into a composite video signal and outputting the composite video signal;
When the ratio of the vertical and horizontal sizes of the display screen of the transfer source display device transferred by the transfer means does not match the ratio of the vertical and horizontal sizes of the display screen of the transfer destination display device, the size of the display screen of the transfer destination display device is set. A wireless communication apparatus comprising: interpolation means for enlarging a transfer image so as to correspond to and interpolating the horizontal size of the transfer image with the same enlargement ratio as the vertical size of the transfer image.   The wireless communication apparatus according to claim 1, further comprising: a command that is output from the transfer unit and that changes a color and a pattern of a space of the display screen of the transfer destination display device that does not display the image signal.   The wireless communication apparatus according to claim 1, further comprising: a command output from the transfer unit and capable of changing an enlargement ratio of a display screen of the transfer destination display apparatus.   The wireless communication apparatus according to claim 1, further comprising: a command output from the transfer unit and capable of designating an output area of a display screen of the transfer destination display apparatus.   The wireless communication apparatus according to claim 1, further comprising: a command that is output from the transfer unit and that can specify a number of lines that can move a display position of the display screen of the transfer destination display apparatus in a vertical direction and a horizontal direction.   The screen size information of the display screen of the transfer destination display device is downloaded by specifying the product number of the transfer destination display device, and the optimum parameter value of the enlargement ratio or the number of moving lines is used as a command from the transfer means. 6. The wireless communication apparatus according to claim 3, wherein the wireless communication apparatus transfers the video signal output means.

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