JP3861915B1 - Image transmission / reception device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an AV amplifier capable of displaying types of resolutions that can be displayed on a display device on a resolution setting screen of a DVD player even when a display device compliant with the DVI standard is connected to the AV amplifier.
An AV amplifier 20 includes an HDMI receiving unit, an HDMI transmitting unit, a PROM 25 for storing the type of resolution read by the DVD player 10, a ROM 23a in which the type of resolution is stored in advance, and a display device 30. Reading means for reading out the type of resolution stored in advance from the display device 30, determination means for determining whether or not the display device 30 complies with the DVI standard, and the display device 30 complies with the DVI standard. If it is determined that the resolution type is stored in the ROM 23a, the resolution registration unit registers all the resolution types stored in the ROM 23a in the PROM.
[Selection] Figure 2

Description

  The present invention relates to an image transmission / reception apparatus that registers, in a storage unit, a resolution type that can be output by an image reproduction apparatus based on a resolution type read from an image display apparatus and a resolution type stored in advance in the image display apparatus.

  Conventionally, as shown in FIG. 3A, a system has been proposed in which a DVD player, an AV amplifier, and a display device are connected via an HDMI cable in accordance with the HDMI (High Definition Multimedia Interface) standard. Image data reproduced by the DVD player is output to a display device via an AV amplifier.

  The display device can display an image with a plurality of resolutions, and the displayable resolution type (for example, XGA) is stored in advance in an unillustrated PROM provided as EDID (Extended Display Identification Data) ( For example, Patent Document 1).

  The AV amplifier also stores in advance a resolution type (these resolutions correspond to the HDMI standard) in a ROM provided therein. The AV amplifier reads the EDID from the connected display device, and reads the type of resolution that can be displayed by the display device from the EDID. The AV amplifier registers an EDID including a resolution that matches the resolution read from the display device among a plurality of resolutions stored in advance in its own ROM in a PROM (not shown).

  The DVD player reads the EDID from the PROM of the AV amplifier and analyzes the type of resolution stored in common by the AV amplifier and the display device. The DVD player sets the resolution of the image output to the AV amplifier based on the user's operation based on the read resolution type. Specifically, the resolution setting is executed by displaying a resolution setting screen of the DVD player and selecting a desired resolution from a plurality of resolutions displayed on the screen. The resolution type displayed on the resolution setting screen is a resolution type that matches the resolution type read from the PROM of the AV amplifier among the resolution types stored in advance in the DVD player. Therefore, only the resolution types stored in common in the AV amplifier and the display device can be displayed on the resolution setting screen.

  Similarly, as shown in FIG. 3B, the AV amplifier can be connected via a DVI cable to a display device conforming to the DVI standard that is compatible with the HDMI standard. Also in this case, the AV amplifier reads EDID from the display device, and PROM stores the EDID including the resolution type common to the resolution type included in the EDID and the resolution type stored in advance in the ROM of the AV amplifier. Register with. The DVD player reads the EDID from the PROM of the AV amplifier and displays the type of resolution included in the EDID on the resolution setting screen.

Japanese Patent Laid-Open No. 11-15425

  According to the HDMI standard, a display device that is an HDMI sink device needs to store in advance all kinds of resolutions that can be displayed in an internal PROM accurately. Therefore, when the DVD player displays the resolution setting screen based on the EDID read from the display device by the AV amplifier, the types of resolutions that can be displayed by the display device are accurately displayed on the resolution setting screen, and the display device displays the user. A desired resolution can be selected from a plurality of possible resolutions.

  However, according to the DVI standard, the display device does not need to accurately store the displayable resolution types in the PROM. For this reason, a display device compliant with the DVI standard may store only a part of the displayable resolution types in the PROM or may not store the resolution types at all due to the capacity of the PROM. In other words, there is a resolution that is not stored in the PROM even though it can be displayed on the display device. When such a display device is connected to an AV amplifier and the DVD player displays a resolution setting screen based on the EDID of the display device, the resolution that can be displayed by the display device cannot be accurately displayed on the resolution setting screen. As a result, although the display device can display, it cannot be set as the resolution when the DVD player outputs the image data, and there is a problem that the image data cannot be output from the DVD player at the resolution.

  An object of the present invention is to display the types of resolutions that can be displayed on a display device on a resolution setting screen of a DVD player connected by an HDMI cable even when a display device compliant with the DVI standard is connected to an AV amplifier. It is to provide an AV amplifier capable of performing the above.

  An image transmission / reception apparatus according to a preferred embodiment of the present invention includes an image reception unit that receives image data from an image reproduction apparatus connected to the outside of the image transmission / reception apparatus, and an image that transmits the image data to an image display apparatus connected to the outside. Transmission means, first storage means for storing the type of resolution read by the image reproduction device, second storage means for storing the type of resolution in advance, and pre-stored in the image display device Reading means for reading the type of resolution from the image display device, determination means for determining whether the connected image display device complies with the first standard, and the image display device A resolution registering unit that registers all of the types of resolutions stored in the second storage unit in the first storage unit when it is determined that the first storage unit is compliant with the first standard.

  In a preferred embodiment, when the determination unit determines that the image display device conforms to the second standard, the resolution registration unit stores the type of resolution stored in the second storage unit. Among these, the resolution type that matches the resolution type read from the image display device is registered in the first storage means.

  In a preferred embodiment, the image transmission / reception apparatus further includes mode setting means that can be set to the first mode or the second mode, and mode determination means that determines the mode set by the mode setting means. When it is determined that the image display device conforms to the first standard and the set mode is the first mode, the resolution registration unit is stored in the second storage unit. All the resolution types are registered in the first storage means. When it is determined that the image display device conforms to the first standard and the set mode is the second mode, the resolution registration unit is stored in the second storage unit. Among the resolution types, the resolution type that matches the resolution type read from the image display device is registered in the first storage unit.

  In a preferred embodiment, the first standard is a DVI standard and the second standard is an HDMI standard.

  An image transmission / reception apparatus operation program according to a preferred embodiment of the present invention includes an image reception step of receiving image data from an externally connected image reproduction apparatus, and an image of transmitting the image data to an externally connected image display apparatus. A transmission step, a resolution registration step for registering the resolution type in a first storage means for storing the resolution type read by the image reproduction device, and a resolution type stored in advance in the image display device. The computer executes a reading step of reading from the image display device and a determination step of determining whether or not the connected image display device complies with the first standard. When it is determined that the image display device conforms to the first standard, in the resolution registration step, all of the resolution types stored in the second storage unit of the image transmitting / receiving device are the first standard. Registered in one storage means.

  If the connected image display device conforms to the first standard, it is determined that the displayable resolution type is not accurately stored in the image display device. Therefore, the image transmission / reception device ignores the resolution type read from the image display device and registers all the resolution types stored in advance in the second storage unit in the first storage unit. The image reproduction device reads the resolution type from the first storage unit, and displays a resolution setting screen based on the resolution type. Therefore, even when the resolution type is not accurately stored in the image display device, all the resolution types stored in the image transmission / reception device are displayed on the resolution setting screen of the image playback device, and the resolution is displayed to the user. Can be selected. Therefore, the problem that the image data cannot be transmitted from the image reproducing device can be solved.

  Hereinafter, a DVD player (image reproduction device), an AV amplifier (image transmission / reception device), and a display device (image display device) according to preferred embodiments of the present invention will be specifically described with reference to the drawings. It is not limited to the embodiment.

  FIG. 1A is a schematic block diagram showing the configurations of the DVD player 10 and the AV amplifier 20, and FIG. 1B is a schematic block diagram showing the configurations of the AV amplifier 20 (same as FIG. 1A) and the display device 30, respectively. The DVD player 10 and the AV amplifier 20 conform to the HDMI standard and are connected via an HDMI cable. The display device 30 conforms to the HDMI standard or the DVI standard, and is connected to the AV amplifier 20 via the HDMI cable in the case of the HDMI standard and via the DVI cable in the case of the DVI standard.

  First, the DVD player 10 will be described. The DVD player 10 includes a reproduction unit 11, a resolution conversion unit 12, an HDMI transmission unit 13, a system control unit 14, an operation display unit 15, a memory 16, and a connector unit 17.

  The reproduction unit 11 reads out image data recorded on a DVD disc (hereinafter simply referred to as a disc) from the disc, decodes it, and supplies it to the resolution conversion unit 12. Also, the playback unit 11 reads out audio data recorded on the disc from the disc, decodes it, and supplies it to the HDMI transmission unit 13. The reproducing unit 11 includes an optical pickup, a servo circuit, an MPEG decoder, etc. (not shown).

  The resolution conversion unit 12 determines the resolution of the image data supplied from the reproduction unit 11. Further, the resolution conversion unit 12 converts the determined resolution of the image data into a resolution set by the user by a command from the system control unit 14. The image data whose resolution is converted by the resolution conversion unit 12 is supplied to the HDMI transmission unit 13.

  The HDMI transmission unit 13 converts the image data supplied from the resolution conversion unit 12 and the audio data supplied from the reproduction unit 11 into HDMI standard data (hereinafter referred to as HDMI data) by a command from the system control unit 14. Convert. The HDMI transmission unit 13 transmits the converted HDMI data to the AV amplifier 20 via the connector unit 17.

  The HDMI transmission unit 13 determines TMDS lines for transmitting and receiving HDMI data (normally, there are a plurality of lines, but only one line is shown in FIGS. 1 and 2 for simplicity), and whether or not there is a connection. Is connected to the HDMI receiving unit 21 of the AV receiver 20 through the hot plug.

  The system control unit 14 controls the reproduction unit 11, the resolution conversion unit 12, the HDMI transmission unit 13, the operation display unit 15, the memory 16, and the like, and is a microcomputer, for example. The system control unit 14 executes various processes based on an operation input from the operation display unit 15 or a control signal and data from each unit.

  The system control unit 14 is connected to the system control unit 23 of the AV amplifier 20 via the CEC line, and transmits / receives commands and / or data to / from the system control unit 23. The system control unit 14 is connected to the PROM 25 of the AV amplifier 20 via the DDC line, reads the EDID stored in the PROM 25, and reads the type of resolution.

  The system control unit 14 causes the operation display unit 15 to display a setup menu for performing various initial settings. The setup menu includes a resolution setting screen for setting the resolution of the output image data by a user operation. When the resolution is set by the user, the system control unit 14 transmits a command for converting an image to the set resolution to the resolution conversion unit 12.

  The memory 16 (for example, ROM) stores in advance the types of resolution that the DVD player 10 can output to the AV amplifier 20.

  The system control unit 14 reads out the resolution type stored in the PROM 25 of the AV amplifier 20 via the DDC line and collates it with the resolution type stored in the memory 16 in advance. The system control unit 14 displays, on the resolution selection screen, the resolution type that matches the resolution type included in the EDID read from the PROM 25 of the AV amplifier 20 among the resolution types stored in advance in the memory 16. indicate.

  Next, the configuration of the AV amplifier 20 will be described. The AV amplifier 20 includes an HDMI receiving unit 21, an HDMI transmitting unit 22, a system control unit 23, an operation display unit 24, a memory (EDID PROM, hereinafter referred to as PROM) 25, an audio processing unit 26, and a connector. Parts 27 and 28.

  The HDMI receiving unit 21 receives the HDMI data transmitted from the DVD player 10, generates original image data (image data before HDMI conversion) from the received HDMI data, and supplies it to the HDMI transmitting unit 22. Further, the HDMI receiving unit 21 generates original audio data from the received HDMI data and supplies the generated audio data to the audio processing unit 26.

  The HDMI transmitting unit 22 converts the image data supplied from the HDMI receiving unit 21 and the audio data supplied from the audio processing unit 26 as necessary into HDMI data, and displays the data via the connector unit 28. To device 30. The HDMI transmission unit 22 is connected to the HDMI reception unit 31 of the display device 30 via a TMDS line and a hot plug.

  The audio processing unit 26 performs processing such as signal processing, amplification processing, and D / A conversion on the audio data supplied from the HDMI receiving unit 21, and supplies the audio signal to the speaker 60 connected to the outside. . Further, the audio processing unit 26 supplies audio data to the HDMI transmission unit 22 as necessary.

  The system control unit 23 controls the HDMI reception unit 21, the HDMI transmission unit 22, the operation display unit 24, the PROM 25, the audio processing unit 26, and the like, and is a microcomputer, for example. The system control unit 23 executes various processes based on an operation input from the operation display unit 24 or a control signal and data from each unit.

  The system control unit 23 is connected to the system control unit 14 of the DVD player 10 via the CEC line, and transmits and receives commands and data to and from the system control unit 14. The system control unit 23 is connected to the system control unit 33 of the display device 30 via the CEC line, and transmits and receives commands and data to and from the system control unit 33. Further, the system control unit 23 is connected to the PROM 34 of the display device 30 via the DDC line, and reads the EDID including the resolution type that can be displayed on the display device 30 from the PROM 34.

  The system control unit 23 incorporates (or is connected to) a memory 23a such as a ROM, and the type of resolution output from the AV amplifier 20 is stored in the ROM 23a in advance (this type of resolution is the ROM 23a). Rather, it may be stored in the PROM 25). Normally, the ROM 23a stores a plurality of resolution types corresponding to the HDMI standard.

  The PROM 25 is connected to the system control unit 14 of the DVD player 10 via a DDC line. In the PROM 25, the EDID including the type of resolution is registered by the system control unit 23, and the registered EDID is read by the system control unit 14 of the DVD player 10 via the DDC line.

  The system control unit 23 has a normal mode and a forced EDID setting mode described below as modes for registering the EDID read by the DVD player 10 in the PROM 25.

  The normal mode is a mode in which only the resolution type that matches the resolution type included in the EDID read from the PROM 34 of the display device 30 among the resolution types stored in advance in the ROM 23 a is registered in the PROM 25. That is, the type of resolution that the AV amplifier 20 and the display device 30 store in common is registered in the PROM 25.

  Specifically, the resolution types stored in advance in the ROM 23a of the AV amplifier 20 are a, b, c, and d, and the resolution types included in the EDID stored in the PROM 34 of the display device 30 are a, In the case of e and f, the EDID including the resolution a is registered in the PROM 25 in the normal mode.

  The forced EDID setting mode is a mode in which all the resolution types stored in the ROM 23 a are registered in the PROM 25 ignoring the resolution types read from the PROM 34 of the display device 30. That is, regardless of the resolution type of the display device 30, the resolution type stored in the AV amplifier 20 is registered in the PROM 25.

  Specifically, the types of resolution stored in advance in the ROM 23a of the AV amplifier 20 are a, b, c, d, and the types of resolution included in the EDID read from the PROM 34 of the display device 30 are a, e, In the case of f, in the forced EDID setting mode, an EDID including resolutions a, b, c, and d is registered in the PROM 25.

  The normal mode or the forced EDID setting mode can be set by the user. For example, a flag is stored in a RAM (not shown) of the system control unit 23, the flag is set when the forced EDID mode is set, and the flag is reset when the normal mode is set.

  When the display device 30 connected to the AV amplifier 20 conforms to the HDMI standard, the system control unit 23 registers the resolution type in the PROM 25 in the normal mode. On the other hand, if the display device 30 connected to the AV amplifier 20 complies with the DVI standard and the forced EDID setting mode is set, the system control unit 23 stores the type of resolution in the PROM 25 in the forced EDID setting mode. If the normal mode is set, the resolution type is registered in the PROM 25 in the normal mode.

  Next, the display device 30 will be described. The display device 30 may be a display device that conforms to the HDMI standard or a display device that conforms to the DVI standard. An HDMI standard display device 30 will be described as an example. The display device 30 includes an HDMI receiving unit 31, a display unit 32, a system control unit 33, a memory (EDID PROM, hereinafter referred to as PROM) 34, and an operation unit. 35, an audio processing unit 36, a speaker 37, and a connector unit 38.

  The HDMI receiving unit 31 receives the HDMI data transmitted from the HDMI transmitting unit 22 of the AV amplifier 20, generates original image data from the received HDMI data, and supplies the original image data to the display unit 32. In addition, the HDMI receiving unit 31 generates original audio data from the HDMI data and supplies it to the audio processing unit 36.

  The display unit 32 is supplied with image data from the HDMI receiving unit 31 and displays an image based on the image data, and is, for example, an LCD or a CRT.

  The audio processing unit 36 performs processing such as signal processing, amplification processing, and D / A conversion on the audio data supplied from the HDMI receiving unit 31 and supplies the processed audio data to the speaker 37.

  The system control unit 33 controls the HDMI receiving unit 31, the display unit 32, the PROM 34, the audio processing unit 36, and the like, and is a microcomputer, for example. The system control unit 33 executes various processes based on an operation input from the operation unit 35 or a control signal and data from each unit.

  In the PROM 34, an EDID including a resolution type that can be displayed on the display unit 32 is stored in advance. The EDID is read by the system control unit 23 of the AV amplifier 23 via the DDC line.

  When the display device 30 is compliant with the DVI standard, a DVI receiving unit is provided instead of the HDMI receiving unit 31. The DVI receiving unit receives DVI data (DVI data does not include audio data) and supplies image data to the display unit 32. In addition, the display device of the DVI standard does not always store all the types of resolutions that can be displayed by the display unit 32 in the PROM 34, and usually only some types of resolutions are stored, The type is not memorized at all. Further, a DVI cable is connected to a display device compliant with the DVI standard, and the DVI cable is connected to an HDMI cable connected to an AV amplifier via a conversion connector.

  The operation and action of the system having the above configuration will be described with reference to FIG. FIG. 2 is a flowchart for explaining processing of the AV amplifier 20. First, when the AV amplifier 20 is powered on (S1), the system control unit 23 determines whether or not the DVD player 10 is connected to the connector unit 27 (S2). If it is determined that the DVD player 10 is connected (S2: YES), the system control unit 23 determines whether or not the display device 30 is connected to the connector unit 28 (S3).

  If it is determined that the display device 30 is connected (S3: YES), the system control unit 23 reads the EDID from the PROM 34 of the display device 30 via the DDC line (S4). The system control unit 23 reads and analyzes the resolution type from the read EDID.

  Next, the system control unit 23 determines whether the connected display device 30 is a device compliant with the HDMI standard or a device compliant with the DVI standard (S5). That is, since the information indicating the standard of the display device is included in the EDID read from the PROM 34, the system control unit 23 determines the standard of the display device 30 by analyzing this information.

  When it is determined that the display device 30 conforms to the DVI standard (S5: DVI), the system control unit 23 determines whether or not the forced EDID setting mode is set by checking a flag (S6).

  If it is determined that the forced EDID setting mode is set (S6: YES), the system control unit 23 extracts all the resolution types stored in advance in the ROM 23a, and selects an EDID including the resolution type. Register in the PROM 25. That is, the resolution type read from the PROM 34 of the display device 30 in S4 is ignored, and the resolution type stored in the AV amplifier 20 is registered in the PROM 25.

  Thereafter, the system control unit 23 prompts the DVD player 10 to read out the EDID by setting the hot plug on the connector unit 27 (DVD player 10) side to a high level (S9). That is, when the system control unit 14 of the DVD player 10 confirms that the hot plug is set to the high level, the EDID is read from the PROM 25 via the DDC line, and the type of resolution stored in the PROM 25 is analyzed. .

  When the display instruction of the resolution setting screen is input from the user, the system control unit 14 of the DVD player 10 has the resolution stored in the PROM 25 of the AV amplifier 20 among the resolution types stored in advance in the memory 16. Select the one that matches the type and display it on the resolution setting screen. In general, all resolutions considered to be compatible with the connected device are stored in the memory 16 in advance in the DVD player 10, so that the resolution setting screen is stored in the PROM 25 of the AV amplifier 20. All resolution types are displayed. The user selects one desired resolution from the resolutions displayed on the resolution setting screen. The system control unit 14 notifies the resolution conversion unit 12 of the resolution type selected by the user, thereby causing the resolution conversion unit 12 to convert the image to the resolution set by the user and output the image.

  As described above, when the DVI standard display device 30 is connected to the AV amplifier 20 and the forced EDID setting mode is set, the resolution setting screen of the display device 30 is stored in the display device 30. Regardless of the type of resolution, all the types of resolution stored in the AV amplifier 20 are displayed. Therefore, even when the display device 30 of the DVI standard does not accurately (or at all) store the displayable resolution types in the PROM 34, the resolution stored in the AV amplifier 20 on the resolution setting screen of the DVD player 10 Can be displayed. Since most of the resolutions stored in the AV amplifier 20 can also be displayed on the display device 30, the resolution types that can be displayed on the display device 30 are displayed on the resolution setting screen and are output as resolutions output from the DVD player 10. You can choose.

  Specifically, the resolutions that can be displayed by the display device 30 (in the DVI standard) are a, b, c, d, e, and f, and the PROM 34 of the display device 30 stores only the resolutions a, e, and f. If the resolution types stored in advance in the ROM 23a of the AV amplifier 20 are a, b, c, and d, only a that is a common resolution type is displayed on the resolution setting screen in the normal mode. However, in reality, the resolutions b, c, and d are also stored in the AV amplifier 20 and can be displayed on the display device 30, but these are not displayed on the resolution setting screen, and image data is output at these resolutions. Can not.

  Here, in the forced EDID setting mode, the resolutions a, b, c, and d stored in advance in the ROM 23a of the AV amplifier 20 are displayed on the resolution setting screen, but all of these resolutions can also be displayed on the display device 30. Resolution. Therefore, even when the display device 30 conforms to the DVI standard and the type of resolution is not accurately stored in the PROM 34, the desired resolution is selected from the resolutions a, b, c, and d that the display device 30 can display. Can be selected.

  If it is determined that the forced EDID setting mode is not set (S6: NO), the system control unit 23 reads the resolution read from the PROM 34 of the display device 30 among the resolution types stored in the ROM 23a. Only the resolution type that matches this type is selected and registered in the PROM 25 (S8).

  If it is determined in S5 that the display device 30 is compliant with the HDMI standard, the system control unit 23 reads the resolution read from the PROM 34 of the display device 30 among the resolution types stored in the ROM 23a. Only the resolution type that matches this type is selected and registered in the PROM 25 (S8).

  Thus, when the HDMI standard display device 30 is connected, the EDID including the resolution type is automatically registered in the PROM 25 in the normal mode. This is because, if the display device 30 is the HDMI standard, all types of resolutions that can be displayed by the display device 30 are always stored in the PROM 34. Therefore, it is necessary to register the resolution types in the PROM 25 in the forced EDID mode. Because there is no. In addition, when the HDMI standard display device 30 is connected, the AV amplifier must output image data at a resolution stored in common by the display device 30 and the AV amplifier 20.

  Specifically, the types of resolutions that can be displayed by the display device 30 (in the HDMI standard) are a, b, c, d, e, f (in this case, the PROM 34 has resolution types a, b, c, d, e, f are stored), and when the types of resolutions stored in advance in the ROM 23a of the AV amplifier 20 are a, b, c, d, a, b, c, d, which are resolutions common to these types. The image data is output at a resolution selected from the above.

  When it is determined in S3 that the display device 30 is not connected (S3: NO), the system control unit 23 registers all the EDIDs stored in the ROM 23a in the PROM 25 (S10), and proceeds to S9.

  As described above, the AV amplifier 20 of this embodiment is a DVD player having a resolution set from a plurality of resolutions stored in the AV amplifier 20 even when the DVI standard display device 30 is connected. 10 can output image data.

  In FIG. 2, the processing after power-on of the AV amplifier 20 is described. However, when the user switches between the forced EDID setting mode and the normal mode, the processing of S4 to S8 is performed similarly. The Further, when the AV amplifier 20 includes a selector circuit that selects and outputs one image data from a plurality of input terminals and image data input from the plurality of input terminals, the selection of the selector is switched. , S4 to S8 may be executed.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. Further, the program may be provided in the form of a program for causing a computer to execute the above operations of the DVD player, AV amplifier, and display device, and a recording medium on which the program is recorded.

  The present invention can be suitably employed in DVD players, AV amplifiers, display devices, and the like that can change the resolution when outputting image data.

1 is a block diagram showing a configuration of a DVD player 10 and an AV amplifier 20 according to a preferred embodiment of the present invention. 1 is a block diagram showing a configuration of an AV amplifier 20 and a display device according to a preferred embodiment of the present invention. 5 is a flowchart for explaining the operation of the AV amplifier 20. It is a block diagram explaining the conventional structure.

Explanation of symbols

10 DVD player (image playback device)
20 AV amplifier (image transmission / reception device)
21 HDMI receiver 22 HDMI transmitter 23 System controller 23a ROM
25 PROM
30 Display device (image display device)

Claims (4)

Image receiving means for receiving image data from an externally connected image reproduction device;
Image transmitting means for transmitting the image data to an externally connected image display device;
First storage means for storing the type of resolution read by the image reproduction device;
A second storage means in which the resolution type is stored in advance;
Reading means for reading out the type of resolution stored in advance in the image display device from the image display device;
Determination means for determining whether the connected image display apparatus conforms to the DVI standard;
Resolution registration means for registering all of the resolution types stored in the second storage means in the first storage means when it is determined that the image display device conforms to the DVI standard; An image transmission / reception apparatus.   When the determination unit determines that the image display device conforms to the HDMI standard, the resolution registration unit selects the image display device from among the resolution types stored in the second storage unit. The image transmission / reception apparatus according to claim 1, wherein a resolution type coinciding with the resolution type read from is registered in the first storage unit. Mode setting means that can be set to forced EDID setting mode or normal mode;
Mode determining means for determining the mode set by the mode setting means,
When it is determined that the image display device conforms to the DVI standard and the set mode is the forced EDID setting mode, the resolution registration unit stores the resolution stored in the second storage unit. Register all of the types in the first storage means;
When it is determined that the image display device conforms to the DVI standard and the set mode is the normal mode, the resolution registration unit stores the resolution type stored in the second storage unit. The image transmission / reception apparatus according to claim 1, wherein a resolution type that matches a resolution type read from the image display apparatus is registered in the first storage unit. An image receiving step of receiving image data from an externally connected image playback device;
An image transmission step of transmitting the image data to an externally connected image display device;
A resolution registration step of registering the type of resolution in the first storage means for storing the type of resolution read by the image reproduction apparatus;
A readout step of reading out the type of resolution stored in advance in the image display device from the image display device;
A determination step of determining whether or not the connected image display device conforms to the DVI standard;
When it is determined that the image display device conforms to the DVI standard, in the resolution registration step, all of the resolution types stored in advance in the second storage means of the image transmitting / receiving device are the first An operation program for the image transmission / reception apparatus registered in the storage means.

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