WO2009014364A2

WO2009014364A2 - A concurrent output signal generator of slot type

Info

Publication number: WO2009014364A2
Application number: PCT/KR2008/004265
Authority: WO
Inventors: Hye-Hoon Lee; Tae-Yung Won
Original assignee: Master Co., Ltd
Priority date: 2007-07-23
Filing date: 2008-07-22
Publication date: 2009-01-29
Also published as: KR100759248B1; WO2009014364A3

Abstract

Disclosed is a slot-type concurrent output signal generator adapted to enable a minimum number of operators to concurrently inspect the screen quality of various display devices in a single process. The slot-type concurrent output signal generator can shorten processes regarding a signal inspection on the production line of various display devices (e.g. CRT, LCD, PDP). The slot-type concurrent output signal generator can be advantageously used for cell-line type or U- line type production so that a minimum number of operators constituting an independent line can concurrently inspect various output terminals on a desired inspection condition in a single process without having to modify the operation of the signal generator. This reduces the cost and improves the productivity.

Description

A CONCURRENT OUTPUT SIGNAL GENERATOR OF SLOT

TYPE

Technical Field

[1] The present invention relates to a slot- type concurrent output signal generator adapted to enable a minimum number of operators to concurrently inspect the screen quality of various display devices in a single process, and more particularly to a slot- type concurrent output signal generator adapted to shorten processes regarding a signal inspection on the production line of various display devices (e.g. CRT, LCD, PDP). Background Art

[2] In general, display devices (e.g. TV) are assembled along a conveyor-type production line as shown on the left of FIG. 1. According to the conveyor- type production line, tens of operators are in charge of respective processes along the conveyor belt (i.e. inline type). The conveyor type is advantageous in that, since each process is handled by only one person during production assembly, skillfulness speeds up the operation. Therefore, the conveyor-type production has been in use for a long time. Particularly, the conveyor type has substantially improved productivity by producing few types of products in a large quantity. However, the increase in productivity by the conveyor- type production line has slowed down these days because various user demands are not easily satisfied by monotonous products and functions, i.e. users want products having different options and diversified colors. Such a change in the consuming pattern has brought about a production line of a cell-line type or U-line type as shown on the right of FIG. 1.

[3] Unlike the conventional conveyor type, according to which 20-30 operators work in a line, the cell-line type employs several operators working in a U- or D-shaped space to handle respective processes, and is suitable for a small amount of production of many types of items. Such a transition in the production scheme requires a change in the inspection method using display inspection devices.

[4] Conventional display inspections solely require inspection devices that are optimized for the process of assembling products along the moving conveyor belt. This means that it is enough to conduct a necessary inspection in a production step. However, conventional display inspection devices are not applicable to cell-line type production, which requires various assembly processes in a singe cell. More particularly, the space is too narrow to accommodate all necessary inspection devices, and it is very expensive to employ all inspection devices necessary for respective steps of the cell for producing various items in a small quantity. Disclosure of Invention

Technical Problem

[5] Therefore, the present invention has been made in view of the above-mentioned problems, and the present invention provides a multiple signal generator having various output terminals mounted in a variable slot type to concurrently output desired signals and patterns so that all types of display devices can be inspected.

[6] The present invention also provides an inspection device adapted to enable the inspector to concurrently inspect different types of display devices at the same place on desired conditions. Technical Solution

[7] In accordance with an aspect of the present invention, there is provided a slot-type concurrent output signal generator for inspecting EDID transmitted from a display device (400) to be inspected, processing HDMI authentication, conducting a desired type of screen quality inspection by each signal generator of a designated slot type, and outputting results, the concurrent output signal generator including a signal generator (100) including a signaler input unit (120) for receiving selection of inspection item setting, screen quality inspection pattern setting, output pattern setting, and a working slot of a slot unit (140), a slot unit (140) including a number of slots for inspecting and outputting screen quality of the display device (400), and a signaler controller (110) for receiving EDID from the display device (400) connected to the working slot of the slot unit (140), reading source data stored in a memory (112) according to a setting condition inputted from the signaler input unit (120), and conducting control so that an inspection proceeds in at least one of a HDMI mode, an analog mode, a digital TV mode, and an analog TV mode according to the setting condition inputted from the signaler input unit (120); a multimedia player (200) adapted to operate independent of the slot unit (140) of the signal generator (100) and inspect screen quality by using moving picture multimedia data; and a display device (400) connected to the signal generator (100) and the multimedia player (200) to transmit EDID, the display device (400) being connected to at least one slot of the slot unit (140) so that results of inspection conducted under the control of the signaler controller (110) or results of inspection conducted by the multimedia player (200) are outputted, the display device (400) being a screen quality inspection object.

Advantageous Effects

[8] The present invention can be advantageously used for cell-line type or U-line type production so that a minimum number of operators constituting an independent line can concurrently inspect various output terminals on a desired inspection condition in a single process without having to modify the operation of the signal generator. This reduces the cost and improves the productivity.

[9] According to the present invention, a single piece of equipment is enough for various types of inspections of different display devices in laboratories and reliability test rooms. In other words, it is unnecessary to replace the display device or signal generator for each inspection item. This improves the process efficiency.

[10] In addition, a single operator can handle all inspection processes at the same place.

This reduces the erroneous inspection ratio and increases the process efficiency and productivity. Brief Description of the Drawings

[11] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[12] FIG. 1 is a block diagram briefly showing the difference between conveyor- type and cell- type production lines;

[13] FIG. 2 is a block diagram showing the construction of a slot- type concurrent output signal generator according to an embodiment of the present invention; and

[14] FIG. 3 shows an exemplary use of the slot- type concurrent output signal generator according to an embodiment of the present invention. Best Mode for Carrying Out the Invention

[15] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same elements will be designated by the same reference numerals although they are shown in different drawings. Further, in the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

[16] As used herein, HDMI (High Definition Multimedia Interface) refers to a non- compression type digital video/audio interface specification, and corresponds to an adaptation of DVI, which is a standard interface specification for PCs and displays, to household A/V appliances. The HDMI transmits images and sounds from the player side to the TV side without compressing them. This makes decoder chips or software dispensable, and connection devices can recognize each other. In addition, video/audio control signals are transmitted through an integrated single cable. This simplifies the wiring of AV devices, each of which can be used in an efficient manner.

[17] EDID (Extended Display Identification Data) refers to information/data regarding display devices (e.g. monitors). This is used to define basic display parameters and characteristics, including the seller/producer ID (identification), support/no support for HDMI and HDCP, and resolution. The information is recorded in the internal micom when the display device (e.g. monitor) is produced. When the user turns on the source device (e.g. PC), the micom communicates with the source device and informs it of specifications of the display device (e.g. monitor). Then, data of a suitable signal type can displayed on the target device.

[18] HDCP (High-bandwidth Digital Content Protection) refers to a copyright protection specification for preventing unauthorized reproduction. Particularly, HDCP is one of copyright protection technologies, which encrypts the path of digital signals exchanged between the video player and display device to prevent unauthorized coping of contents.

[19] DVI (Digital Video/Visual Interactive) refers to a standard video interface optimized for the screen quality of computer displays (e.g. flat panel LCD monitors) and digital display devices (e.g. digital projectors). The DVI has been designed by the DDWG (Digital Display Working Group) to transmit uncompressed digital video data to displays.

[20] Finally, as used herein, source data refers to video information/data, resolution

(TIME) data, and audio data, which serve as the standard of screen quality inspection of display devices. In the case of a signal generator 100, video information/data corresponds only to still image data, and in the case of a multimedia player 200, video information/data includes still image data and moving picture data.

[21] FIG. 2 is a block diagram showing the construction of a slot- type concurrent output signal generator according to an embodiment of the present invention, and FIG. 3 shows an exemplary use of the slot-type concurrent output signal generator.

[22] Referring to FIG. 2, the slot-type concurrent output signal generator according to an embodiment of the present invention includes a signal generator 100 having a slot unit 140 on the rear surface so that a number of working slots can be coupled, and a signaler input unit 120 on the front surface so that the inspection item, output pattern, and working slot can be selected; a multimedia player 200 capable of not only still image and audio inspections, but also a moving picture multimedia inspection; and a display device 400 to be inspected.

[23] The signal generator 100 includes a signaler input unit 120 for receiving selection of inspection item setting, screen quality inspection pattern setting, output pattern setting, and working slot of the slot unit 140; a slot unit 140 having a number of slots for inspecting and outputting the screen quality of the display device 400; a signaler controller 110 for receiving EDID from the display device 400 connected to the working slot of the slot unit 140, reading resolution and inspection pattern data stored in the memory 112 according to a setting condition inputted from the signaler input unit 120, and processing the EDID of the display device 400 according to the setting condition inputted from the signaler input unit 120 so that an inspection is conducted in at least one of a HDMI mode, an analog mode, a digital TV mode, and an analog TV mode under the control of the signaler controller 110; a first display unit 130 for displaying a screen quality inspection output mode, a format mode, and output slot information; a signaler input/output unit 150 for communicating with an external PC 170; and a PC 170 for enabling input of a setting condition other than the inspection pattern stored in the memory 112 of the signaler controller 110 and for exchanging control signals with the signaler controller 110 via the signaler input/output unit 150.

[24] The signaler controller 110 of the signal generator 100 includes a memory 112 for storing video and audio pattern data, resolution data, and output slot function information, which serve as standards for screen quality inspection. The signaler controller 110 controls a slot of the slot unit 140, which conducts a screen quality inspection and outputs the result, and receives EDID of the display device 400 from the working slot of the slot unit 140. The signaler controller 110 reads source data stored in the memory 112 according to the screen quality inspection pattern, inspection item, and output pattern selected by the signaler input unit 120, and transmits the EDID and source data to the slot selected by the signaler input unit 120 so that the selected slot conducts an inspection under the control of the signaler controller 110. When no separate inspection is conducted to determine whether the EDID of the display device 400 is normal or not, and when the signaler input unit 120 has been set to conduct a HDCP inspection, the signaler controller 110 displays EDID information on the screen of the connected display device 400 together with the HDCP inspection result. The signaler controller 110 retrieves a screen quality inspection pattern for EDID inspection from the memory 112 of the signaler controller 110, and checks detailed information regarding the EDID of the display device 400. The pattern for EDID information checking consists of analog 128 bytes, analog 256 bytes, DVI 128 bytes, DVI 256 bytes, HDMI 128 bytes, HDMI 256 bytes, etc.

[25] The slot unit 140, which is one of major characteristics of the present invention, has eight detachable slots coupled to inspect the screen quality of the display device 400 according to the EDID received from the signaler controller 110 and source data (inspection standard) under the control of the signaler controller 110. The slot unit 140 outputs the inspection result to the display device 400 according to the output pattern set by the signaler input unit 120. The inspection slot coupled to the slot unit 140 may include at least one of a HDMI inspection slot, an analog video and audio inspection slot, a digital monitor video screen quality inspection slot, and an analog monitor video screen quality inspection slot. FIG. 3 shows three HDMI inspection slots coupled to the slot unit 140, and some slots are not coupled. Similarly, the same type of eight inspection slots may be coupled to the slot unit 140; the same type of 2-3 inspection slots may be coupled; no inspection slot may be coupled; only a specific one of coupled slots may be used for inspection (i.e. working slot); or all coupled slots may be used as working slots. As such, the detachable slots of the slot unit 140 according to the present invention can be variously configured according to the inspector's intention so that different display devices 400 can be inspected concurrently, or different inspection items of the same display device 400 can be conducted concurrently. In addition, the fact that slots conduct screen quality inspections independently is advantageous because, if one of slot attachment/detachment units malfunctions, the slot can be attached to another slot attachment/detachment unit to conduct a screen quality inspection.

[26] The number of slots coupled to the slot unit 140 can be easily modified by those skilled in the art.

[27] On the front portion, the signal generator 100 includes a slot selection unit 121 for selecting a working slot of the slot unit 140; a key selection unit 123 for numerically selecting source data, particularly resolution (TIME), audio, and video (pattern), which acts as the standard for inspecting the screen quality of the target display device 400; a jog & shuttle 122 protruding in a cylindrical shape so that video pattern data, resolution data, and audio data, which serve as inspection standards, stored in the memory 112 are changed/selected as the jog & shuttle 122 rotates; an item selection unit 124 for receiving selection of the type of inspection items (video pattern, resolution, and audio) from the jog & shuttle 122 or key selection unit 123; a mode selection key 125 for setting the output mode (CVBS, D-TV, HDMI, TIME) selected/ changed for each resolution, format mode (NTSC, PAL, DVB, ATSC), audio on/off, HDCP function test on/off in the HDMI mode, screen ratio (4:3, 16:9), scan inspection on/off, and EDID inspection on/off; a media key selection unit 126 for determining to which of the signal generator 100 and the multimedia player 200 the input result of the signaler input unit 120 is to be delivered; and a CF card unit 127 adapted to store new or user-created video pattern data, resolution data, and audio data in the memory 112 of the signaler controller 110.

[28] The item selection unit 124 determines to which of video pattern inspection, resolution inspection, and audio inspection the inspection data selected by the key selection unit 123 or the jog & shuttle 122 corresponds. The media key selection unit 126 is configured in a toggle type to determine whether all input contents of the signaler input unit 120 are to be operated by the input unit of the signal generator 100 or by that of the multimedia player 200. The signal generator 100 and the multimedia player 200 of the slot-type concurrent output signal generator according to the present invention operate independently for video and audio inspections of the display device 400. The media key selection unit 126 is a device for minimizing redundant construction resulting from such independent operation. If the media key selection unit 126 is selected, input made by the signaler input unit 120 is transmitted to the multimedia player 200, and if not, the input is transmitted to the signal generator 100. Those skilled in the art can understand that input commands specific to the signal generator 100 have no effect on the multimedia player 200.

[29] Conditions regarding the screen quality inspection and output pattern setting inputted from the signaler input unit 120 according to the present invention include output pattern (CVBS, D-TV, HDMI, TIME) selection, format mode (NTSC, PAL, DVB, ATSC) selection, audio use setting, HDCP inspection setting in the HDMI mode, screen ratio setting, scan inspection setting, and EDID inspection setting.

[30] The first display unit 130 displays the number of the current working slot, mode, time number, and pattern number on the top. Detailed information regarding current output timing and information regarding the parameter of each slot are displayed below the top. Vacant slots are labeled N/C.

[31] The signaler input/output unit 150 transmits/receives control signals between the PC

170 and the signaler controller 110 so that setting conditions other than the source data stored in the memory 112 of the signaler controller 110 can be inputted. The signal generator 100 can conduct a screen quality inspection, a resolution inspection, and an audio data inspection by means of an application program of the PC 170 connected to the signaler input/output unit 150.

[32] The multimedia player 200 has a media input unit 220 and a second display unit 230 on the front portion, and a media input/output unit 240 and a USB terminal 250 on the rear portion.

[33] The media input unit 220 installed on the front portion of the multimedia player 200 is used to select the output mode regarding the result of inspection of the display device 400, which is outputted to the media input/output unit 240. The inspection item, setting mode, etc. of the multimedia player 200 are determined by the signaler input unit 120 of the signal generator 100. If the media key input unit 126 of the signaler input unit 120 is selected, overall setting items regarding the inspection inputted to the signaler input unit 120 control the operation of the multimedia player 200, not that of the signal generator 100. Therefore, the multimedia player 200 needs no separate input unit for determining source data. When the selected slot inspects the screen quality of the display device 400, the signal generator 100 does not have to determine the output mode (HDMI), analog video and audio mode (AUDIO), digital monitor video mode (D-TV), or analog monitor video (TV). In contrast, the multimedia player 200 must determine the output mode because the inspection result is outputted via a single media input/output unit 240. The second display unit 230 displays the output mode, format information, EDID on/off information, audio on/off information, HDCP on/off information, screen ratio information, image slide on/off information, program version, etc.

[34] The media input/output unit 240 installed on the rear portion of the multimedia player 200 forwards EDID from the display device 400 to the media controller 210, and outputs the result of screen quality inspection conducted by the media controller 210 to the display device 400 according to the output mode of the media input unit 220. The USB terminal 250 transmits/receives control signals between the PC 270 and the media controller 210 so that setting conditions other than the inspection pattern data based on the resolution stored in the hard disk 214 of the media controller 210 can be inputted. The multimedia player can add (change or delete) large-capacity or newly- developed video and audio data to the hard disk 214 via the PC 270 connected to the USB terminal 250, and can conduct a control program and BIOS update.

[35] The media controller 210 includes memories 212 and 213 storing initial menu values for screen quality inspection, and a hard disk 214 separately storing data regarding a number of screen quality inspection patterns for sounds, still images, and moving pictures for each resolution, which serve as standards of screen quality inspection. The media controller 210 retrieves the initial menu values from the memories 212 and 213, and receives format mode (NTSC, PAL, DVB, ATSC) selection, audio use setting, HDCP inspection setting in the HDMI mode, screen ratio setting, scan inspection setting, and EDID inspection setting from the signaler input unit 120. Then, the media controller 210 retrieves source data conforming to the setting condition from the hard disk 214, and conducts video, resolution, and audio inspections with regard to the display device 400 according to the setting condition. The inspection result is transmitted to the display device 400 via the media input/output unit 240 according to the output mode (HDMI mode, audio mode, TV mode, D-TV mode) inputted from the media input unit 220.

[36] A process of inspecting the EDID (Extended Display Identification Data) by the media controller 210 will now be described. When an EDID inspection has been set by the signaler input unit 120, the media controller 210 of the multimedia player 200 checks the head value (8 bytes) transmitted from the display device 400 and, if there is any error, recognizes that there is no EDID. According to the selected EDID inspection setting (ON/OFF), output is disabled (in the case of ON), or output is allowed (in the case of OFF) regardless of whether there is an error or not.

[37] If the head value has no error, the data value following the head value is checked.

The data consists of a video block (128 bytes) and an audio block (128 bytes), and it is recognized that EDID is normal if both blocks have no errors. It is recognized that no EDID data exists if the video block has an error but the audio block has no error, or if both blocks have errors. If the video block is normal but the audio block has an error, the DVI mode is recognized, and operation proceeds in that mode. [38] When the EDID is normal, frame information (infoframe), such as A/V data format and frequency, is set according to characteristics of the external display device based on the retrieved data.

[39] The process of checking HDCP (High-Bandwidth Digital Content Protection) by the controller of the media controller 201 will now be described. When the HDCP check setting is ON, the audio/video data of the inputted media contents (HDCP support) is parsed, and the detected key value (5 bytes) is transmitted to the connected external display device 400, and is compared with a key value returned from it. If the key values are identical, the video/audio output is enabled, and checking is repeated at every two seconds to confirm if the HDCP function of the display device is normally operating, as long as the contents are being driven.

[40] If the inputted contents do not support HDCP, a key value created by the media controller 210 itself is used to conduct the same process as mentioned above. If the HDCP check function is OFF, the HDCP function inspection is not conducted.

[41] FIG. 3 shows an exemplary use of the slot- type concurrent output signal generator according to an embodiment of the present invention. It is clear from FIG. 3 that a number of slots are coupled to the slot unit 140 according to the present invention so that the screen quality of various display devices (e.g. CRT, LCD, PDP) can be conducted concurrently.

[42] Although several exemplary embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

[1] A slot- type concurrent output signal generator for inspecting EDID transmitted from a display device (400) to be inspected, processing HDMI authentication, conducting a desired type of screen quality inspection by each signal generator of a designated slot type, and outputting results, the concurrent output signal generator comprising: a signal generator (100) comprising a signaler input unit (120) for receiving selection of inspection item setting, screen quality inspection pattern setting, output pattern setting, and a working slot of a slot unit (140), a slot unit (140) comprising a number of slots for inspecting and outputting screen quality of the display device (400), and a signaler controller (110) for receiving EDID from the display device (400) connected to the working slot of the slot unit (140), reading source data stored in a memory (112) according to a setting condition inputted from the signaler input unit (120), and conducting control so that an inspection proceeds in at least one of a HDMI mode, an analog mode, a digital TV mode, and an analog TV mode according to the setting condition inputted from the signaler input unit (120); a multimedia player (200) adapted to operate independent of the slot unit (140) of the signal generator (100) and inspect screen quality by using moving picture multimedia data; and a display device (400) connected to the signal generator (100) and the multimedia player (200) to transmit EDID, the display device (400) being connected to at least one slot of the slot unit (140) so that results of inspection conducted under the control of the signaler controller (110) or results of inspection conducted by the multimedia player (200) are outputted, the display device (400) being a screen quality inspection object.

[2] The concurrent output signal generator as claimed in claim 1, wherein the signaler controller (110) of the signal generator (100) comprises a memory (112) storing source data serving as a screen quality inspection standard and information regarding functions of output slots, the signaler controller (110) controls the slot unit (140) conducting a screen quality inspection and outputting a result so that EDID of the display device (400) is received from the working slot of the slot unit (140), the signaler controller (110) reads source data stored in the memory (112) according to a screen quality inspection pattern, an inspection item, and an output pattern selected by the signaler input unit (120), and the signaler controller (110) transmits EDID and source data to a slot selected by the signaler input unit (120) and conducts control so that the selected slot processes inspection.

[3] The concurrent output signal generator as claimed in claim 2, wherein the multimedia player (200) comprises: a media input/output unit (240) for checking EDID under the control of the media controller (210) so that results of one of a HDMI inspection, an analog video and audio inspection, a digital monitor screen quality inspection, and an analog monitor screen quality inspection is outputted to the display device (400); a media controller (210) having memories (212 and 213) storing initial menu values for screen quality inspection and a hard disk storing source data comprising moving picture data, the media controller (210) retrieving the initial menu values from the memories and processing EDID transmitted from the display device (400) connected to the media input/output unit (240) and source data stored in the hard disk according to a setting condition of the media input unit (200).

[4] The concurrent output signal generator as claimed in claim 3, wherein the slot unit (140) conducts a screen quality inspection of the display device (400) according to EDID received from the signaler controller (110) and source data acting as an inspection standard under the control of the signaler controller (110) by using the working slot selected by the signaler input unit (120), and the slot unit (140) outputs inspection results to the display device (400) according to the output mode set by the signaler input unit (120).

[5] The concurrent output signal generator as claimed in claim 4, wherein the slot unit (140) comprises at least one of a HDMI inspection slot, an analog video and audio inspection slot, a digital monitor video screen quality inspection slot, and an analog monitor video screen quality inspection slot.

[6] The concurrent output signal generator as claimed in claim 4 or 5, wherein the slot unit (140) comprises at least eight detachable slots.

[7] The concurrent output signal generator as claimed in claim 4, wherein the signal generator (100) further comprises a signaler input/output unit (150) for communicating with an external PC (170), and a first display unit (130) for displaying a screen quality inspection output pattern, a format mode, and output slot information.

[8] The concurrent output signal generator as claimed in claim 4 or 7, wherein the signaler input unit (120) comprises: a slot selection unit (121) for selecting a working slot of the slot unit (140); a jog & shuttle (122) for changing and selecting source data stored in the memory (112) of the signaler controller (110) as the jog & shuttle (122) is rotated; a key selection unit (123) for changing and selecting source data stored in the memory (112) of the signaler controller (110) as numeric keys are pressed; an item selection unit (124) for receiving selection of a type of an inspection item

(screen quality pattern, resolution, audio) selected by the jog & shuttle (122) or the key selection unit (123); a mode selection key (125) for setting an output pattern (CVBS, D-TV, HDMI,

TIME) selected/changed for each resolution, a format mode (NTSC, PAL, DVB,

ATSC), audio on/off, HDCP function test on/off in HDMI mode, screen ratio

(4:3, 16:9), scan inspection on/off, and EDID inspection on/off; a media key selection unit (126) for choosing to deliver a setting condition of the signaler input unit (120) to one of the signal generator (100) and the multimedia player (200); and a CF card unit (127) adapted to store new or user-created source data in the memory (112) of the signaler controller (110).

[9] The concurrent output signal generator as claimed in claim 8, wherein the multimedia player (200) further comprises a media input unit (220) for selecting an output mode outputted to the media input/output unit (240), and a second display unit (230) for displaying the output mode of the media input unit (220), video and audio data, and resolution data, and the media controller (210) retrieves source data from the hard disk (214), the source data conforming to an output mode selected by the media input unit (220) after the media key selection unit (126) of the signaler input unit (120) has been selected, as well as to a setting condition inputted from the signaler input unit (120), and converts/edits the source data according to the setting condition.

[10] The concurrent output signal generator as claimed in claim 9, wherein, when the media key selection unit (126) of the signaler input unit (120) is selected and when an EDID inspection is set by the mode selection key (125), EDID check is conducted by the media controller (210) of the multimedia player (200); when an EDID header received from the display device (400) connected to a HDMI terminal has an error, it is recognized that there is no EDID; when the header has no error and when video and audio blocks have no errors, it is recognized that the EDID is normal; when the video block has an error but the audio block has no error, or when both video and audio blocks have errors, it is recognized that there is no EDID; when the video block has no error but the audio block has an error, DVI is recognized; and, when the EDID is normal and HDCP inspection is set, audio and video data of inputted EDID is parsed to detect a key value (5 bytes), transmit the key value to the connected display device (400), compare the key value with a key value returned from the display device (400), and enable audio/ video output when the key values are identical.

[11] The concurrent output signal generator as claimed in claim 8, wherein, when the media key selection unit (126) is selected by the signaler input unit (120) of the signal generator (100), the signaler input unit (120) of the signal generator (100) functions as an input unit for setting a screen quality inspection of the display device (400) connected to the media input/output unit (240) of the multimedia player (200), and menu values of the signaler input unit (120) of the signal generator (100) for controlling the multimedia player (200) comprise EDID Check/Info, AUDIO/Bri, SCAN/Con, Ratio/Sat, CVBS, DTV 50/60, HDCP, HDMI 50/60, and PATTERN INFO.

[12] The concurrent output signal generator as claimed in claim 7, wherein the first display unit (130) of the signal generator (100) displays a working slot number, an output pattern, a resolution number, a video pattern number, current output resolution information, and each slot's parameter information.

[13] The concurrent output signal generator as claimed in claim 9, wherein the second display unit (230) of the multimedia player (200) displays an output mode, format information, EDID on/off information, audio on/off information, HDCP on/off information, screen ratio information, image slide on/off information, and program version.

[14] The concurrent output signal generator as claimed in claim 8, wherein the signal generator (100) further comprises a PC (170) for enabling input of an inspection pattern other than source data stored in the memory (112) of the signaler controller (110) and transmitting/receiving control signals with the signaler controller (110) via the signaler input/output unit (150).

[15] The concurrent output signal generator as claimed in claim 9, wherein the multimedia player (200) further comprises a USB terminal (250) for transmitting/receiving control signals with an external device, and a PC (270) for enabling input of a setting condition other than source data stored in the hard disk of the media controller (210) and transmitting/receiving control signals with the media controller (210) via the USB terminal (250).