JP2011250329A - Signal conversion apparatus and signal conversion method - Google Patents

Abstract

The present invention provides a signal conversion apparatus and method for converting a video signal conforming to the HDMI 1.4 standard so that 3D video can be displayed even in an LSI conforming to the standard prior to HDMI 1.3.
An HDMI signal input unit to which a video signal compliant with the HDMI standard is input; a video type determination unit that determines whether the video signal input to the HDMI signal input unit is a 3D video signal or a 2D video signal; When the video type discriminating unit discriminates that the video signal is a 3D video signal, the video signal discriminating as a 2D video signal by the video type discriminating unit, And a first output unit that outputs a video signal converted by the signal conversion unit.
[Selection] Figure 1

Description

  The present invention relates to a signal conversion apparatus and method for displaying a stereoscopic (hereinafter, abbreviated as 3D) video using an LSI (Large Scale Integration) that performs processing for displaying a two-dimensional (hereinafter abbreviated as 2D) video. About.

  In recent years, display devices such as televisions that can display 3D video have been put on the market, but display devices that display normal 2D video and display devices that display 3D video have different specifications in various respects such as standards. ing. For example, HDMI (High-Definition Multimedia Interface) is a standard for inputting and outputting video and audio. In May 2009, Version 1.4 (hereinafter referred to as HDMI 1.4 standard) was announced. This HDMI 1.4 standard corresponds to a method of transmitting an HDMI signal of 3D video, and the 3D video is transmitted in a signal format compliant with the HDMI 1.4 standard from the transmission side device, and is displayed according to the HDMI 1.4 standard. Received and displayed by the device. On the other hand, an LSI of a display device compliant with a version before Version 1.3 (HDMI 1.3 standard) cannot process a 3D video signal compliant with the HDMI 1.4 standard.

  In addition, as described in Patent Document 1, the display principle of 3D video is to display a video viewed with the right eye (right video) and a video viewed with the left eye (left video), respectively, and the viewer recognizes the parallax of each video. , It looks like the video is displayed in 3D. The 3D video signal conforming to the HDMI 1.4 standard is a format in which signals for one frame of the right video and one frame of the left video are superimposed on one synchronization signal, and the liquid crystal shutter of the glasses is adapted to the superposition format. 3D video by controlling the display so that the right video is viewed by the right eye and the left video is viewed by the left eye Is recognized.

Japanese Patent Application Laid-Open No. 2004-071102 (published March 4, 2004)

  In order to display 3D video transmitted via an HDMI cable, the HDMI 1.4 standard (the HDMI 1.4 standard has been sequentially upgraded to the 1.4a standard and the 1.4b standard. It is necessary to prepare an LSI conforming to the above. However, there is a problem that it takes a development period and development cost to newly develop an LSI.

  Therefore, the present invention provides a signal conversion apparatus and method for converting a video signal conforming to the HDMI 1.4 standard so that 3D video can be displayed even in an LSI conforming to the standard prior to the HDMI 1.3 standard, and its development cost is reduced. The purpose is to realize reduction.

  A first signal conversion device according to the present invention includes an HDMI signal input unit to which a video signal compliant with the HDMI standard is input, and whether the video signal input to the HDMI signal input unit is a 3D video signal or a 2D video signal. A video type discriminating unit for discriminating; a signal converting unit for adding a synchronization signal to the input video signal when the video type discriminating unit discriminates a 3D video signal; and a 2D video signal by the video type discriminating unit And a first output unit for outputting the video signal determined by the signal conversion unit or the video signal converted by the signal conversion unit.

  The second signal conversion apparatus according to the present invention includes an HDMI signal input unit to which a video signal compliant with the HDMI standard is input, and a video signal input to the HDMI signal input unit is a standard before the HDMI 1.3 standard. And a signal type discriminating unit for discriminating whether the signal complies with the HDMI 1.4 standard, and when the signal type discriminating unit discriminates that the signal is compatible with the HDMI 1.4 standard, A video type discriminating unit that discriminates whether the signal is a 3D video signal or a 2D video signal, and a signal conversion unit that adds a synchronization signal to the input video signal when the video type discriminating unit discriminates that the signal is a 3D video signal A video signal determined to be compatible with the HDMI 1.3 standard or earlier by the signal type determination unit, a video signal determined to be a 2D video signal by the video type determination unit, and a signal conversion unit. Of the video signal, and having a second output unit for outputting any one.

  Furthermore, the signal conversion device according to the present invention is based on the video signal input to the HDMI signal input unit or the video signal output from the output unit in the first signal conversion device or the second signal conversion device. The image processing apparatus further includes a control unit that acquires video information and a display unit that displays video using the acquired video information.

  The first signal conversion method according to the present invention includes a step of inputting a video signal compliant with the HDMI standard, a step of determining whether the input video signal is a 3D video signal or a 2D video signal, and a 3D video When it is determined that the signal is a signal, the method includes a step of adding a synchronization signal to the input video signal to convert the video signal, and a step of outputting the input video signal or the converted video signal. And

  Further, the second signal conversion method according to the present invention includes a step of inputting a video signal compliant with the HDMI standard, and whether the input video signal is a signal compliant with a standard prior to the HDMI 1.3 standard or the HDMI 1.4 standard. A step of determining whether the signal is compatible with the standard, a step of determining whether the input video signal is a 3D video signal or a 2D video signal when the signal is determined to be compatible with the HDMI 1.4 standard, and a 3D video signal. If determined to be present, a step of adding a synchronization signal to the input video signal to convert the video signal, a video signal determined to be compatible with the HDMI 1.3 standard or earlier, and a 2D video signal are determined. And a step of outputting any one of the converted video signals.

  Furthermore, in the signal conversion method according to the present invention, in the first signal conversion method or the second signal conversion method, the video signal inputted in the step of inputting the video signal or outputted in the step of outputting. The method further comprises the steps of acquiring video information from the acquired video signal and displaying video using the acquired video information.

  According to the present invention, it is possible to process a 3D video signal conforming to the HDMI 1.4 standard using an LSI conforming to the standard before the HDMI 1.3 standard that supports display of only 2D video.

Signal converter Processing of signal converter Specific example of signal converter processing Signal converter

  A conventional television apparatus receives a broadcast wave with a tuner, inputs a broadcast signal from a set top box to a D terminal, inputs an HDMI signal from a playback apparatus such as a BD / DVD player to an HDMI terminal, The received / input video signal is displayed, but when the HDMI signal of 3D video is input, the present invention converts the input video signal so as to comply with the standard before the conventional HDMI 1.3 standard. In addition, 3D video can be displayed on a conventional television apparatus. Specifically, before processing a video signal with an LSI compliant with the HDMI 1.3 standard or earlier, the HDMI signal is converted so that the LSI can handle it. Next, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1
Embodiment 1 demonstrates the 1st form of a signal converter using FIG. As shown in FIG. 1, the signal conversion apparatus 101 according to the present embodiment includes at least an HDMI signal input unit 102, a video type determination unit 103, a signal conversion unit 104, and an output unit 105, and the HDMI signal input unit 102. Is inputted with a video signal compliant with the HDMI 1.4 standard.

  First, when a video signal conforming to the HDMI 1.4 standard is input to the HDMI signal input unit 102, the video type determination unit 103 determines whether the input video signal is a 3D video signal or a 2D video signal. To do. When the input video signal is determined to be a 3D video signal, the signal converter 104 further adds a synchronization signal between the synchronization signals included in the video signal (hereinafter referred to as an additional synchronization signal). Details will be described later.) The signal is converted. Then, the output unit 105 outputs the video signal converted by the signal conversion unit 104 to the display device 106. When the video signal input by the video type determination unit 103 is determined as a 2D video signal, the output unit 105 outputs the video signal input to the HDMI signal input unit 102 to the display device 106. Then, the display device 106 displays the video signal output from the output unit 105 using an LSI conforming to the HDMI 1.3 standard.

  The video type discriminating unit 103 determines whether the input video signal is a 3D video signal or a 2D video signal by referring to HDMI_Video_Format in HDMI Vendor Specific InfoPacket Contents defined in the HDMI 1.4 standard. If this is “010”, it is determined that the input video signal is a 3D video signal.

  Next, processing for adding a synchronization signal and converting the signal by the signal conversion unit 104 will be described in detail with reference to FIGS. As shown in FIG. 2A, a video signal of 3D video conforming to the HDMI 1.4 standard is divided by a synchronization signal 211 for each constant frequency (X [Hz]). It includes a right video signal for one frame and a left video signal for one frame. As shown in FIG. 2B, the signal conversion unit newly adds an additional synchronization signal 212 so as to divide the signal included between the synchronization signals 211 into two equal parts, and converts the signal. After the conversion, the signal has a double frequency and is divided into a video signal 1 and a video signal 2. Note that the right video signal for one frame and the left video signal for one frame included between the synchronization signals 211 before conversion are divided into two and included in the video signal 1 or the video signal 2. Yes.

  FIG. 3 shows a specific example of the signal after such conversion. FIG. 3A shows a 48 Hz signal to which an additional synchronization signal 312 is added so as to separate the left video and the right video. Before conversion, the video signal is 24 Hz, and the video signal includes signals in the order of left video for one frame with a vertical size V of 1080 lines and right video for one frame between one sync signal 311. It was a signal.

  On the other hand, FIG. 3B shows a 60 Hz signal to which the additional synchronization signal 312 is added in a form that separates the left video and the right video. Before the conversion, the video signal is 30 Hz, and the video includes signals in the order of a left video for one frame having a vertical size V of 720 lines and a right video for one frame between one synchronization signal 311. It was a signal.

  FIG. 3C shows a 60 Hz signal to which an additional synchronization signal 312 is added so as to separate the video corresponding to the odd lines and the video corresponding to the even lines. Before conversion, the video signal is 30 Hz. Between one sync signal 311, there are a left video for one frame and a right video for one frame with a vertical size V of 1080 lines, which correspond to odd lines. The video signal includes signals in the order of left video, right video corresponding to odd lines, left video corresponding to even lines, and right video corresponding to even lines.

  Note that whether the input video signal corresponds to any of the formats shown in FIGS. 3A to 3C is determined by 3D_Structure or 3D_Ext_Data in the HDMI Vendor Specific InfoPacket Contents defined by the HDMI 1.4 standard. You can see it by reference.

  Then, the reception unit (not shown) of the display device 106 receives the video signal data output from the output unit 105 of the signal conversion device, and the CPU (not shown) of the display device is the reception unit. Information on whether the received video signal is 3D video, video information such as the number of lines per frame, the frequency before conversion (the frequency after conversion is twice the frequency before conversion), etc. . When the video signal output from the output unit 105 is a 3D video signal, a necessary display is appropriately provided so that the right video and the left video can be displayed separately according to the method of displaying the 3D video on the display device 106. Process. For example, in the case where the display device 106 alternately displays the right image and the left image in a time division manner and views using the liquid crystal shutter glasses, the display device 106 further includes a communication unit that performs infrared communication with the liquid crystal shutter glasses. The process of synchronizing with the liquid crystal shutter is performed in the unit. In the case where the display device 106 separates and displays the right image and the left image using the property of polarization, a polarization filter is provided.

  On the other hand, when the video signal output from the output unit 105 is not a 3D video signal, it is not necessary to perform the 3D video display process as described above, and the 2D video is displayed.

[Embodiment 2]
In the second embodiment, a description will be given of a case where both a signal compliant with the HDMI 1.3 standard and a signal compliant with the HDMI 1.4 standard are input to the HDMI signal input unit described in the first embodiment. In this embodiment, a process for determining whether or not it complies with the HDMI 1.4 standard is performed. A process of determining whether the video signal is a 3D video signal or a 2D video signal is performed.

  As shown in FIG. 4, the signal conversion apparatus 401 of this embodiment includes at least an HDMI signal input unit 402, a signal type determination unit 407, a video type determination unit 403, a signal conversion unit 404, and an output unit 405. . The signal type determination unit 407 determines whether the video signal input to the HDMI signal input unit 402 conforms to the HDMI 1.4 standard or conforms to the HDMI 1.3 standard, and conforms to the HDMI 1.4 standard. In some cases, the video type determination unit 403 determines whether the video signal is a 3D video signal or a 2D video signal. Then, according to the determination result, as described in the first embodiment or the second embodiment, the processing in the signal conversion unit 404 or the output unit 405 is performed.

  On the other hand, when the signal type determination unit 407 determines that the received signal conforms to the HDMI 1.3 standard, the video signal input to the HDMI signal input unit 402 is output to the display device 406 by the output unit 405. In addition, the description about the same part as Embodiment 1 was abbreviate | omitted.

[Embodiment 3]
In the third embodiment, an embodiment will be described in which video information such as whether the video signal is a 3D video signal is acquired by a method different from that of the first and second embodiments, and display processing of the 3D video is performed.

  In this embodiment, the CPU of the display device controls the HDMI signal input unit of the signal conversion device, and the CPU of the display device determines whether the video signal is a 3D video from the video signal input to the HDMI signal input unit. Information, the number of lines per frame, frequency information before conversion, and the like are acquired from HDMI Vendor Specific InfoFrame Packet Contents. Information is exchanged between the CPU and the HDMI signal input unit by wired or wireless communication. In addition, the description about the same part as Embodiment 1 or Embodiment 2 was abbreviate | omitted.

[Embodiment 4]
In the first to third embodiments, the processing for determining whether or not to convert a signal in the signal conversion unit is described using the information in the HDMI Vendor Specific InfoFrame Packet Content. 4, the signal conversion unit converts the signal using a command signal indicating that 3D video display processing is performed / not performed, which is input via a button of the signal conversion device or the display device, a remote control device, or the like. A mode for performing the process of determining whether or not will be described.

  As described in the first to third embodiments, the command signal is directly input from the outside (whether it is a 3D video signal) before automatically determining whether the input signal is a 3D video signal. It may be a thing or an input instead of the discrimination.

  In the above description, the signal conversion device and the display device are described as separate devices. However, both the display device and the signal conversion unit that performs the same processing as the signal conversion device are included in the television device. The present invention can be implemented even with one apparatus having a function. Needless to say, the embodiments can be appropriately combined.

  The signal conversion apparatus and method of the present invention are capable of displaying 3D video conforming to the HDMI 1.4 standard using an LSI conforming to the standard prior to the HDMI 1.3 standard.

101, 401 Signal conversion device 102, 402 HDMI signal input unit 103, 403 Video type discrimination unit 104, 404 Signal conversion unit 105, 405 Output unit 106, 406 Display device
407 Signal type determination unit 211, 311 synchronization signal 212, 312 additional synchronization signal

Claims (6)

An HDMI signal input unit to which a video signal compliant with the HDMI standard is input;
A video type determination unit that determines whether the video signal input to the HDMI signal input unit is a 3D video signal or a 2D video signal;
A signal conversion unit that adds a synchronization signal to the input video signal when the video type determination unit determines that the video type determination unit is a 3D video signal;
A signal conversion apparatus comprising: a first output unit that outputs a video signal determined as a 2D video signal by the video type determination unit or a video signal converted by the signal conversion unit. An HDMI signal input unit to which a video signal compliant with the HDMI standard is input;
A signal type discriminating unit for discriminating whether the video signal input to the HDMI signal input unit is a signal corresponding to a standard before the HDMI 1.3 standard or a signal corresponding to the HDMI 1.4 standard;
A video type discriminating unit that discriminates whether the input video signal is a 3D video signal or a 2D video signal when the signal type discriminating unit determines that the signal is compatible with the HDMI 1.4 standard;
A signal conversion unit that adds a synchronization signal to the input video signal when the video type determination unit determines that the video type determination unit is a 3D video signal;
The video signal determined to be compatible with the HDMI 1.3 standard or earlier by the signal type determination unit, the video signal determined to be a 2D video signal by the video type determination unit, and the video signal converted by the signal conversion unit And a second output unit that outputs any one of them. A control unit for obtaining video information from a video signal input to the HDMI signal input unit or a video signal output from the output unit;
The signal conversion apparatus according to claim 1, further comprising: a display unit that displays video using the acquired video information. A step of inputting a video signal compliant with the HDMI standard;
Determining whether the input video signal is a 3D video signal or a 2D video signal;
If it is determined to be a 3D video signal, adding a synchronization signal to the input video signal to convert the video signal;
And a step of outputting the input video signal or the converted video signal. A step of inputting a video signal compliant with the HDMI standard;
Determining whether the input video signal is a signal corresponding to a standard before the HDMI 1.3 standard or a signal compatible with the HDMI 1.4 standard;
Determining whether the input video signal is a 3D video signal or a 2D video signal when it is determined that the signal is compatible with the HDMI 1.4 standard;
If it is determined to be a 3D video signal, adding a synchronization signal to the input video signal to convert the video signal;
A step of outputting any one of a video signal determined to be compatible with a standard prior to the HDMI 1.3 standard, a video signal determined to be a 2D video signal, and a converted video signal. Signal conversion method. Obtaining video information from the video signal input in the step of inputting the video signal or the video signal output in the step of outputting;
6. The signal conversion method according to claim 4, further comprising a step of displaying an image using the acquired image information.

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