KR100759500B1 - A multimedia player device and the using method for test of the screen - Google Patents

Abstract

A multimedia player device and a method for inspecting picture quality of the multimedia player device are provided to reduce time and a process for defect test and picture quality estimation of the player device. An input unit(10) receives set conditions for inspecting multimedia data, and reads and receives initial menu values stored in a memory of a processing unit(20). The processing unit(20) performs HDMI(High-Definition Multimedia Interface) authentication and EDID(Extended Display Identification Data)/HDCP(High-bandwidth Digital Content Protection) check with respect to an inputted signal to convert and process data according to the set conditions. An input and output unit(30) controls a multimedia player through an external PC(40). An output terminal(50) outputs a digital signal converted by the processing unit. A display device(50) displays the outputted signal.

Description

A Multimedia Player Device and the using Method For Test of the Screen}

1 is a block diagram schematically showing a conventional image quality inspection apparatus.

2 is a block diagram of an image quality inspection apparatus according to an embodiment of the present invention.

3 is a flowchart illustrating a method for checking an image quality according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

1: DVD 2: Video Signal Generator

3: TV / D-TV

10: input unit 20: processing unit

30: input and output unit 40: PC

50: output unit 60: display device

The present invention relates to a multi-purpose display image quality inspection apparatus and method, using a high-resolution multimedia data such as moving images and images in the flat panel display production and image quality inspection process to conveniently image the multimedia source of various formats to the target device according to the intention of the inspector And it relates to a multimedia player device for inspecting the image quality of the display device by outputting an audio signal and a method of operating the same.

In general, a source for image quality inspection of a display device includes a still image, an image signal, a video signal, and an audio signal. Currently, video signal generators (DVDs) and digital video disks (DVDs) are widely used for evaluating image quality of display devices using A / V sources such as video signals and audio signals.

1 is a block diagram of a display image quality evaluation apparatus using a conventional A / V source.

Referring to FIG. 1, an apparatus for evaluating display quality using an A / V source includes a DVD 1 for transmitting digital video signals and audio signals; A video signal generator 2 for transmitting still image signals and audio signals such as video patterns and images; And a TV / D-TV (3) for receiving and displaying the digital video signal and audio signal transmitted from the DVD (1) and the video signal generator (2), and the still picture signal transmitted from the video signal generator (2). The quality of the display device was judged by visual or measurement device to determine whether the result of the audio signal received on the TV / D-TV (3) is properly expressed according to each standard. Based on the video signal and the audio signal transmitted from), it is determined whether the display device quality is poor.

However, the quality test using the DVD video source has to replace the DVD title and DVD player that meets the requirements according to the resolution and transmission method (American method and European method) every time, and the HDMI (High-Definition Multimedia Interface) signal is converted to Full HD ( It could not output up to 1080P), and there was a problem such as not outputting audio by automatically recognizing it as DVI (Digital Visual Interface) mode when there is an error in EDID data such as a monitor or TV that supports the HDMI transmission standard. .

Therefore, there is a need for an apparatus and method that satisfies the HDMI standard and can conveniently inspect / evaluate the image quality of a display device regardless of whether there is a defect in a transmission method and an HDCP / EDID function.

The present invention has been proposed to solve the above-mentioned conventional problems, evaluates the image quality of a display device through a multi-purpose multimedia player that reproduces multimedia sources such as images and audio as well as video, and HDMI transmission standard. The purpose of the present invention is to provide an image quality inspection apparatus and method capable of inspecting whether the EDID and HDCP function of the display device supporting the proper operation.

The present invention consists of an input unit 10, a processor 20, an input / output unit 30, a PC 40, an output unit 50 and a display device 60 subject to the image quality test to check the image quality of the multimedia player An apparatus (10) comprising: an input unit (10) for reading an initial menu value stored in a memory of the processing unit (20), and receiving an inspection and image quality setting condition among the menu values; Check the memory for storing the initial menu value for the image quality check, the hard disk (HDD) for storing the source data as a reference for the inspection and the image quality test, and the EDID of the display device 60 connected to the HDMI connector. A processing unit 20 including a control unit which processes HDMI authentication, reads source data meeting the inspection and image quality setting conditions of the input unit 10 from a hard disk (HDD), and converts and edits the source data according to the setting conditions; ; An input / output unit 30 composed of at least one of a USB, Ethernet, and RS-232C connector capable of transmitting and receiving a control signal between the PC 40 and the processing unit 20; A PC 40 capable of inputting setting conditions other than menu values stored in a memory of the processing unit 20 and transmitting and receiving a control signal with the processing unit 20 through the input / output unit 30; According to the setting conditions received from the input unit 10 as output terminals of various types that can be converted and edited source data in a desired format as CVBS, S-Video, Y Pb Pr, Optical, HDMI, Audio, DVI, An output unit 50 including one or more of D-Sub and D-Terminal; And a display device 60 composed of one of CRT, LCD, PDP, and D-TV / HDTV supporting the HDMI transmission standard.

       In the setting conditions received from the input unit 10 of the present invention, the output mode (CVBS, D-TV, HDMI, TIME) selection, the format mode (NTSC, PAL, DVB, ATSC) selection, audio use setting, HDMI mode HDCP check settings, screen ratio (4: 3, 16: 9) settings, scan check settings, EDID check settings are included.

        In addition, the present invention is a processing unit 20 for processing the HDMI authentication by checking the EDID of the display device 60 connected to the HDMI connector is stored and the initial menu value for the image quality test and the source data as the standard of the image quality test; An input unit 10 for reading an initial menu value stored in the processing unit 20 and receiving a setting condition of an image quality test from the menu values; An input / output unit 30 for transmitting and receiving a control signal through the PC 40 to the processing unit 20; A PC 40 capable of inputting setting conditions other than menu values stored in the processing unit 20 and transmitting and receiving a control signal with the processing unit 20 through the input / output unit 30; An output unit 50 for outputting the source data converted according to a setting condition received from the input unit 10 in a desired format; And a display (60) consisting of one of CRT, LCD, PDP, and D-TV / HDTV supporting HDMI transmission standard, wherein the display quality is determined by (a) inspection, image quality and output conditions for evaluating display quality. Inputting the set signal to the input unit (10); (b) reading source data meeting the inspection and image quality setting conditions set by the input unit 10 by the processing unit 20 and comparing and converting the source data according to the setting conditions; (c) transmitting the compared / converted signal in step (b) to the display apparatus 60 and editing and displaying the output video signal under the output condition set in step (a). It is characterized by.

       Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, the same components are denoted differently in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

2 is a block diagram of an image quality inspection apparatus according to an embodiment of the present invention.

Referring to FIG. 2, an embodiment of the present invention provides an input unit 10 configured to set conditions for inspecting multimedia data in a desired format, and to load and select initial menu values stored in a memory (ROM) of the processor 20. ; It is possible to control the multimedia player through the processing unit 20 and the external PC 40 by checking the HDMI authentication process and EDID / HDCP inspection for the input signal, and converting and processing data according to the setting conditions. An input / output unit 30; An output terminal 50 for outputting a digital (HDMI or DVI) signal converted through the processing unit 20; And a display device 60 for displaying a video signal.

In this case, HDMI (High Definition Multimedia Interface) is one of the uncompressed digital video / audio interface standards, which is the DVI standard, which is the interface standard of PC and display.

In addition, since HDMI transmits video and audio from the player to the TV without the need for a decoder chip or software, the connected devices have a function of recognizing each other. In addition, since the video, audio, and control signals are transmitted through a single cable integrated, the wiring of AV equipment can be simplified, and each AV equipment can be used organically.

In addition, EDID (Extended Display Identification Data) means information data of a display device such as a monitor. It defines the vendor / producer identification, whether it supports HDMI and HDCP, and basic display variables and characteristics such as resolution. Information is recorded in the internal micom when producing display devices such as monitors. When an end user turns on a source device such as a PC, communication is received to inform the source device of the specifications of the display device such as a monitor. It is possible to display on the device.

In addition, HDCP (High-Bandwidth Digital Content Protection) is a copyright protection standard for copy protection. HDCP is one of copyright protection technologies that encrypts a path for transmitting and receiving digital signals from a video playback device to a display device such as a display, thereby preventing the contents from being copied illegally.

In addition, DVI (Digital Video / Visual Interactive) is a standard video interface optimized for the quality of digital display devices such as computer displays and digital projectors, including flat panel LCD monitors. DVI was designed by the Digital Display Working Group (DDWG) to transmit uncompressed digital image data to a display.

The input unit 10 retrieves and displays an initial menu value stored in a memory (ROM) of the processing unit 20 according to a user's request, and at this time, the display device 60 that is automatically detected (Hot Plug Detect) through an HDMI terminal. Receives the EDID data of the check and displays the information of the display device. The user sees the displayed menu value and inputs the inspection and picture quality setting conditions. The input device may include a key, a remote controller, an infrared ray, a keyboard or a mouse attached to the front of the media player. The setting conditions include output mode (CVBS, D-TV, HDMI, TIME), format mode (NTSC, PAL, DVB, ATSC), audio use (On / Off), HDCP in HDMI mode. Includes functional test (On / Off), screen ratio (4: 3, 16: 9), scan check (On / Off), EDID check (On / Off).

The control unit CPU of the processing unit 20 processes the HDMI authentication by checking the EDID of the display device 60 connected to the HDMI connector, and stores the A stored in the HDD according to the selection and preset conditions through the input unit 10. / V source is configured to detect and convert.

 The process of checking the Extended Display Identification Data (EDID) in the control unit CPU of the processing unit 20 is as follows. First, if there is an error by checking the head value (8 bytes) transmitted from the display device 60, it recognizes that there is no EDID data, and forcibly disables the output according to the selected EDID test setting (On / Off). (On) or output can be enabled (Off).

Next, if there is no error in the head value, the data value following the head value is checked. The data consists of a video block (Video Block, 128 Bytes) and an audio block (Audio Block, 128 Bytes). If no, the EDID is recognized as normal. If there is an error in the video block and there is no error in the audio block, or both of the blocks have an error, the EDID data is recognized. Next, if the video block is normal or the audio block is an error, it operates in the DVI mode.

If the EDID is normal, frame information such as A / V data format and frequency are set according to the characteristics of the external display apparatus through the read data.

In addition, the process of checking the high-bandwidth digital content protection (HDCP) in the control unit of the processing unit 20 is as follows. First, when the HDCP check setting is On, the audio and video data of the input media content (HDCP support) is parsed and transmitted by detecting the detected key value (5Byte) to the connected external display device 60. Enables Video / Audio output when it is the same compared to the Key value returned from the display device, continuously checking at 2-second intervals while Contents is running Check if the HDCP function of the display device is working properly.

If the input content does not support HDCP, the processing unit 20 performs the same operation as described above with a key value generated by itself. If the HDCP Check function is Off, the HDCP function check is not performed.

The input / output unit 30 is composed of a USB, Ethernet, and RS-232C connector capable of transmitting and receiving control signals through the PC 40.

In the PC 40, it is possible to select and edit the output mode by using a separate control program (User Time), and to operate the user to perform various types of inspection and image quality evaluation. Send and receive control signals.

The output unit 50 is an output terminal of various types that can output data converted and edited according to conditions in a desired format, and includes CVBS, S-Video, Y Pb Pr, Optical, HDMI, Audio, DVI, D-Sub, It consists of D-Terminal.

The display 60 may be configured of an LCD, a PDP, a D-TV / HDTV, etc., including a monitor supporting the HDMI transmission standard.

3 is a flowchart illustrating a method for checking an image quality according to an embodiment of the present invention.

Referring to FIG. 3, the input unit 10 sets a test and output condition for evaluating display image quality and inputs a signal (S10).

Then, the controller 20 detects the multimedia source, compares the data according to the set condition, and converts the data into a suitable form (S20) (S30).

The compared / converted signal in the step S20 is transmitted to the display apparatus 60, and the output image signal is edited and displayed as a user setting value (S40) (S50).

The setting conditions in the step (S10), the output mode (CVBS, D-TV, HDMI, TIME) setting, whether to use AUDIO (On / Off), HDCP function test (On / Off), Ratio (4: 3, 16) : 9) Includes SCAN (On / Off), EDID Check (On / Off) conditions.

       The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

According to the present invention, in the production and inspection process of the display device, it is possible to integrate test of still image and video quality evaluation including audio into one equipment, and test is possible regardless of the transmission method. The process and time for evaluation can be shortened.

In addition, the present invention can also be applied to the video test because the EDID can be operated like a DVD by checking the EDID even in the panel or assembly process without EDID, and in the process for quality evaluation and inspection of the production line By replacing DVD and expensive signal generator, there is a significant cost saving effect.

Claims (7)

The multimedia player which consists of the input part 10, the processing part 20, the input / output part 30, the PC 40, the output part 50, and the display apparatus 60 to which image quality test is carried out, and examines the image quality of a display apparatus. In the apparatus, An input unit (10) for reading an initial menu value stored in a memory (ROM) of the processing unit 20, and receiving an inspection and image quality setting condition among the menu values; From the memory (ROM) that stores the initial menu value for the image quality test, the hard disk (HDD) for storing the source data as a reference for the inspection and image quality test, and the display device 60 connected to the HDMI connector (Connector) Control unit (CPU) to process the HDMI authentication by checking the transmitted EDID, and to read and convert the source data corresponding to the inspection and image quality setting conditions of the input unit 10 from the hard disk (HDD) and convert and edit according to the setting conditions. A processing unit 20 including a; An input / output unit (30) composed of at least one of a USB, Ethernet, and RS-232C connector capable of transmitting and receiving a control signal between the PC (40) and the processing unit (20); A PC 40 capable of inputting setting conditions other than menu values stored in a memory of the processing unit 20 and transmitting and receiving a control signal with the processing unit 20 through the input / output unit 30;  According to the setting conditions received from the input unit 10 as output terminals of various types that can be converted and edited source data in a desired format as CVBS, S-Video, Y Pb Pr, Optical, HDMI, Audio, DVI, An output unit 50 including one or more of D-Sub and D-Terminal; And And a display device (60) consisting of one of a CRT, an LCD, a PDP, and a D-TV / HDTV supporting the HDMI transmission standard. The method of claim 1, wherein the setting condition received from the input unit 10, Select output mode (CVBS, D-TV, HDMI, TIME), select format mode (NTSC, PAL, DVB, ATSC), enable audio, set HDCP inspection in HDMI mode, screen ratio (4: 3, 16: 9) A multimedia player device for inspecting image quality of a display device, comprising setting, scan check setting, and EDID check setting. The method of claim 2, wherein the processing unit 20, when the EDID check is set by the input unit 10, If there is an error in the EDID header transmitted from the display device 60, it recognizes that there is no EDID, If there is no error in the header, the EDID is normal if there is no error in the video block and the audio block; If there is an error in the video block and there is no error in the audio block, or if both the video and audio block have errors, there is no EDID; Multimedia player device for checking the image quality of the display device, characterized in that the video block is recognized as DVI if there is no error in the video block. The method of claim 3, wherein the processing unit 20 is the case that the EDID is normal and HDCP check is set, Parse the input EDID audio video data and transmit the detected key value (5 bytes) to the connected display device 60, and then return the key from the display device 60. A multimedia player device for checking the image quality of a display device, wherein the audio / video output is enabled when the comparison is the same as a value of (Key). The method of claim 1, The input unit 10 may include at least one of a key, a remote controller, an infrared ray, a mouse, and a keyboard attached to the front of the multimedia player device. Player device. A processing unit 20 configured to process the HDMI authentication by checking the EDID of the display device 60 connected to the HDMI connector and storing the initial menu value for the image quality test and the source data as the standard for the image quality test; An input unit 10 for reading an initial menu value stored in the processing unit 20 and receiving a setting condition of an image quality test from the menu values; An input / output unit (30) for transmitting and receiving a control signal between the PC (40) and the processing unit (20); A PC 40 capable of inputting setting conditions other than menu values stored in the processing unit 20 and transmitting and receiving a control signal with the processing unit 20 through the input / output unit 30; An output unit 50 for outputting the source data converted according to a setting condition received from the input unit 10 in a desired format; And a display 60 composed of any one of a CRT, an LCD, a PDP, and a D-TV / HDTV supporting the HDMI transmission standard.       (A) step (S10) of inputting the signal to the input unit 10 for setting the inspection, image quality and output conditions for the display image quality evaluation;       (b) reading the source data meeting the inspection and image quality setting conditions set by the input unit 10 from the processing unit 20 and comparing and converting the source data according to the setting conditions ((S20) (S30) );        (c) transmitting the compared / converted signal in step (b) to the display device 60 and editing and displaying the output video signal under the output condition set in step (a) ((S40) (S50) Display quality inspection method characterized in that it comprises a)) ;. The method of claim 6, wherein the setting condition in the step (a), Output mode (CVBS, D-TV, HDMI, TIME), format mode (NTSC, PAL, DVB, ATSC), using audio (AUDIO), HDCP inspection in HDMI mode, screen ratio (4: 3, 16: 9), Display quality inspection method comprising a scan (SCAN) inspection, EDID inspection.

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