JP4557878B2 - Resolution switching means for HDMI output - Google Patents

Description

  The present invention relates to a resolution switching means when outputting HDMI (High Definition Multimedia Interface).

  In Patent Document 1, every time a display device such as a monitor is connected to an image output device such as a DVD (Digital Versatile Disc) playback device, an image output capable of accurately setting display conditions for image information on the display device is disclosed. An apparatus is described. In the DVD playback device described in Patent Document 1, a CPU that acquires in advance condition information, which is information indicating display conditions, from a monitor (television) device having an HDMI input terminal, and outputs the condition information to a monitor (television) device having an HDMI input terminal. An information conversion unit that converts image information based on acquired condition information, and an HDMI transmission unit that outputs converted image information that is image information converted by the information conversion unit to a monitor (television) device having an HDMI input terminal The image information acquired from the DVD recording medium is converted and output to a monitor (television) device having an HDMI input terminal connected to the DVD playback apparatus.

  The resolution at the time of HDMI connection and output is a recording area (EDID is, for example, 1080i, 720p, 480p, 480i) whose resolution information that can be received (displayed video) on the TV equipment side is called EDID (Extended Display Identification Data). A plurality of information is recorded on the television device side).

Normally, the HDMI device on the transmitting device side reads the resolution information, and if there are multiple resolutions that can be supported by the receiving side (for example, a television device) having an HDMI input terminal, it is displayed as a selection item by the setting menu on the transmitter side, The resolution is selected by user operation on the transmitter side.
JP 2005-109703 A

  Conventionally, when switching the resolution with HDMI output, for example, it is necessary to switch by changing the device setting of a DVD player or the like (for example, in the case of Patent Document 1, image information acquired from a DVD recording medium is used). The image is converted based on the condition information acquired from the monitor (television) device having the HDMI input terminal and output to the monitor (television) device having the HDMI input terminal). However, there is a problem in that the operation method for switching the resolution is different depending on the connected device such as a DVD player, and the switching method is difficult to achieve the target resolution.

  In the present invention, when an external device (DVD player or the like) is connected to a television device (display device including a monitor) having an HDMI input terminal for viewing, the switching is performed by an operation on the television device side having the HDMI input terminal. The purpose is to be able to change to the desired resolution.

  In the present invention, as means for changing the resolution information recorded on the television equipment side having the HDMI input terminal, switching is performed without recording a plurality of resolution information by user selection on the television equipment side having the HDMI input terminal. For example, on the receiver side having the HDMI input terminal, when the resolution information recorded on the television device side having the HDMI input terminal is read, the resolution that can be handled is “ By recognizing only “one”, it is possible to switch the resolution by a user operation on the side of the television device having the HDMI input terminal.

  According to the present invention, when an external device (DVD player or the like) is connected to a television device (display device including a monitor) having an HDMI input terminal for viewing, the operation method is performed on the device (for example, DVD) on the transmitting device side. Because of the difference (model / manufacturer name), it is possible to change the resolution to be switched by the operation on the TV device side having the HDMI input terminal without performing a complicated menu operation each time.

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

  FIG. 1 shows an outline of connection between an HDMI transmitter and a television receiver provided with the resolution switching means of the present invention. In FIG. 1, an HDMI transmitter 1 and a television receiver 2 are connected via an HDMI cable 3. The HDMI transmitter 1 and the HDMI cable 3 are connected by an HDMI connector 4, and the television receiver 2 and the HDMI cable 3 are connected by an HDMI connector 5.

  The HDMI transmitter 1 includes a video processing unit 6 and a CPU 7, and the video processing unit 6 transfers a digital signal (video, audio) 13 to the television receiver 2 via the HDMI cable 3. The CPU 7 of the HDMI transmitter 1 controls the transfer of the digital signal (video, audio) 13 by the video processing unit 6 based on the resolution information (EDID information) sent from the television receiver 2.

  The television receiver 2 includes a video processing unit 8, a display unit 9, a CPU 10, an EDID 11, and an OSD (On Screen Display) controller 12, and the video processing unit 8 of the television receiver 2 is transferred via the HDMI cable 3. The processed digital signal (video, audio) 13 is processed and displayed on the display unit (monitor) 9.

  The CPU 10 of the television receiver 2 controls the operation of an OSD (On Screen Display) controller 12 that adjusts video display on a display unit (monitor), and an HDMI transmitter of EDID information 14 such as resolution information stored in the EDID 11. Control transfer to 1.

FIG. 2 shows the configuration of the resolution switching means for HDMI output according to the first embodiment of the present invention mounted on the television receiver 2.
In FIG. 2, the resolution switching means at the time of HDMI output includes a control unit 20, a storage unit 21, an OSD processing unit 22, a receiving unit 23, a signal processing unit 24, an image monitoring unit 25, an audio monitoring unit 26, and a key input unit 27. The input signal interface 28 is provided, and an HDMI signal is acquired from the externally connected DVD device 29 via the input signal interface 28.

  The signal received by the receiving unit 23 is subjected to signal processing by the signal processing unit 24 and output to the image monitoring unit 25 and the audio monitoring unit 26. The control unit 20 inputs a signal from the signal processing unit 24 and controls operations of the signal processing unit 24, the image monitor unit 25, and the audio monitor unit 26. In addition, the control unit 20 inputs a setting signal from the key input unit 27 and inputs / outputs signals between the OSD processing unit 22, the input signal interface 28, and the storage unit 25 to perform necessary control processing.

  The input signal interface 28 includes a composite video signal terminal, an audio signal terminal, a component video signal terminal, an HDMI signal terminal, and a DVI (Digital Visual Interface) signal terminal. The DVD device is externally connected via the HDMI signal terminal. Get information from. The control unit 20 stores in advance the resolution information selected according to the setting conditions of the setting signal input from the key input unit 27 in a storage area called EDID in the storage unit 21, and the externally connected DVD device Inputs an HDMI signal via the HDMI signal terminal of the input signal interface 28 based on the corresponding resolution information stored in a storage area called EDID.

  Since only specific resolution information connected via the input signal interface 28 is stored in the EDID in the storage unit 21, the EDID stored in the EDID in the storage unit 21 is used when switching the resolution of the received signal. It is possible to switch to a specific resolution corresponding to a specific DVD.

  Of the resolution switching means during HDMI output shown in FIG. 2, the control unit 20 and the OSD processing unit 22 correspond to the CPU 10 and the OSD controller 12 of the television receiver 2 of FIG. The image monitor unit 25 and the audio monitor 26 correspond to the video processing unit 8 and the display unit 9 of the television receiver 2 of FIG. Moreover, the memory | storage part 21 respond | corresponds to the memory | storage part containing EDID11 of the television receiver 2 of FIG.

  Each of the corresponding components of the resolution switching means described above may be shared with each component of the television receiver 2, or may be configured as a separate device from each component of the television receiver 2. Is possible.

  FIG. 3 is a flowchart showing a procedure for switching the resolution during HDMI output according to the first embodiment of the present invention. In FIG. 3, first, in the case where a situation where it is desired to switch the resolution occurs in step 101, in step 102, a setting signal is input by operating the key input unit 27, and the image monitor unit 25 on the television receiver 2 side. Display a resolution switching menu, and select the resolution to be switched by operating the key input unit 27.

  Next, in step 103, the control unit 20 of the resolution switching means on the television receiver 2 side sets the resolution information in the storage area called EDID of the storage unit 21 to the resolution to be switched selected by the operation of the key input unit 27. (EDID information) is rewritten. Next, in step 104, HDMI connection re-authentication processing is executed under the control of the television receiver 2. Next, in step 105, re-authentication is started on the television receiver 2 side and the HDMI transmitter 1 side, and in step 106, re-authentication processing is executed.

  Next, in step 107, the HDMI transmitter 1 side reads the EDID information on the television receiver 2 side, and in step 108, the HDMI transmitter 1 side transmits an HDMI signal that is a video signal based on the read resolution information. With the above procedure, in step 109, the resolution switching is completed.

In the first embodiment, the resolution switching means is described as being provided on the television receiver 2 side. However, the HDMI terminal of the resolution switching means is used for all AV equipment such as a television, a monitor, a personal computer, and an audio device. In addition, the present invention can be applied to display devices including all AV equipment such as televisions, monitors, personal computers, and audio equipment.
In the first embodiment, an example of a DVD is shown as a recording medium. However, the recording medium is not limited to image information, but AV data such as image / audio data or PC (personal computer) data. The present invention can also be applied to a recording / reproducing apparatus (for example, a hard disk player or a digital VTR (D-VHS)) that can record and reproduce various data.

FIG. 1 is a schematic diagram showing the connection between an HDMI transmitter and a television receiver provided with the resolution switching means of the present invention. FIG. 2 is a diagram illustrating a configuration of the resolution switching unit at the time of HDMI output according to the first embodiment of the present invention. FIG. 3 is a flowchart showing the procedure for switching the resolution during HDMI output according to the first embodiment of the present invention.

Explanation of symbols

1 HDMI transmitter 2 TV receiver 3 HDMI cable 4 HDMI connector 5 HDMI connector 6 Video processing unit 7 CPU
8 Video processing unit 9 Display unit 10 CPU
11 EDID
12 OSD controller 13 Digital signal transfer 14 Resolution information 20 Control unit 21 Storage unit 22 OSD processing unit 23 Reception unit 24 Signal processing unit 25 Image monitor unit 26 Audio monitor unit 27 Key input unit 28 Input signal interface 29 DVD

Claims (4)

Resolution switching means provided at the display device side during HDMI output,
An input signal interface connected to a recording / reproducing device for recording and / or reproducing data stored in a recording medium, and a plurality of resolutions recorded in a resolution information recording area on the display device side and displayed on a monitor on the display device side A key input unit for selecting specific resolution information from the information;
Includes a storage unit having a resolution information recording area for storing rewriting the resolution information to a specific resolution information selected by the key input unit, and a control unit for controlling the operation of said input signal interface the storage unit,
The control unit transmits the selected resolution information selected and stored in the resolution information recording area to the recording / reproducing apparatus, and receives an HDMI signal corresponding to the particular resolution information from the recording / reproducing apparatus as the input signal. Resolution switching means for HDMI output, characterized by receiving via an interface.   2. The resolution switching means for HDMI output according to claim 1, wherein the display device is a television device, and data stored in a recording medium is image information. A display device having a resolution switching means at the time of HDMI output,
An input signal interface connected to a recording / reproducing device for recording and / or reproducing data stored in a recording medium, and a plurality of resolutions recorded in a resolution information recording area on the display device side and displayed on a monitor on the display device side A key input unit for selecting specific resolution information from the information;
A storage unit having a resolution information recording area for rewriting and storing the resolution information in the specific resolution information selected by the key input unit, and a display for displaying the HDMI signal from the recording / reproducing apparatus input via the input interface And a control unit that controls operations of the input signal interface, the storage unit, and the display unit,
The control unit transmits the selected resolution information selected and stored in the resolution information recording area to the recording / reproducing apparatus, and receives an HDMI signal corresponding to the particular resolution information from the recording / reproducing apparatus as the input signal. A display device comprising resolution switching means during HDMI output, wherein the display device receives the signal via an interface and displays it on the display unit of the display device.   The display device according to claim 3, wherein the display device is a television device, and the data stored in the recording medium is image information.