KR100318840B1 - Digital TV system capable of troubleshooting - Google Patents

Abstract

The present disclosure relates to a digital TV system capable of diagnosing faults in each signal processing block in a digital TV. The system of the present invention is a PC which outputs test image data of a specific screen for fault diagnosis of each functional block of the digital TV, and receives the image data from the PC and encodes it according to the signal format of the digital TV. The encoders supplied to the TV, the functional blocks of the digital TV that perform the same process as the process of receiving the test image data encoded by the encoder to view the digital broadcast signal, and the data restored from each of the functional blocks A host that sequentially reads the plurality of memories for storage and the data restored in the memory of the test target function block and compares them with previously stored test image data, and outputs the fault diagnosis signal of the corresponding function block to which the abnormality is detected to the PC. It consists of a processor. Therefore, the present invention provides the effect that the user can quickly deal with such a request for A / S by recognizing the failure of the digital TV.

Description

Digital TV system capable of troubleshooting

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital television (hereinafter referred to as a TV). More particularly, the present invention relates to a digital TV system connected to an external PC and capable of diagnosing failure of each signal processing block in the digital TV.

In accordance with the recent digital trend, high definition (HD) digital broadcasting will soon begin. Therefore, a digital TV system capable of receiving and watching digital broadcasts has been developed and continues to develop.

However, the conventional digital TV has a problem that it is impossible to determine which block failure even if a failure occurs.

Accordingly, an object of the present invention is to provide a digital TV system capable of diagnosing a fault that can identify a fault block so as to solve the above problem.

1 is a block diagram showing a digital TV system capable of diagnosing faults according to an embodiment of the present invention.

※ Explanation of code for main part of drawing

11: Tuner 12: IF section

13 Channel Decoder 14 T / S Demux

15: video decoder 16: format converter

17: OSGM 18: CRT drive unit

19: CRT 20: Host Processor

151: first memory 161: second memory

171: third memory 100: PC (Personal Computer)

101: encoder

A digital TV system capable of diagnosing the fault of the present invention for achieving the above object includes a PC for outputting test image data of a specific screen for diagnosing the functional blocks of the digital TV, and image data from the PC. Encoder that receives the input and encodes it according to the signal format of the digital TV and supplies it to the digital TV, and the function of the digital TV to perform the same process as the process of receiving the test image data encoded by the encoder to view the digital broadcast signal Blocks, a plurality of memories for storing the data restored in each of the functional blocks, and the data restored in the memory of the functional block to be read in sequence and then compared with the previously stored test image data corresponding to the detected abnormality And a host processor for outputting a fault diagnosis signal of a functional block to the PC.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a digital TV system capable of diagnosing a failure according to an embodiment of the present invention. As shown in FIG. 1, the system is connected to a personal computer 100 for providing test image data of a specific screen for failure diagnosis to a digital TV. The PC 100 is connected through a host processor (20) and an agitate (Universal Asynchronous Receiver Transmitter: UART) in the digital TV. The signal output from the PC 100 is encoded and output to the digital TV. Encoder 101 is connected for this purpose. In addition, in the apparatus of FIG. 1, the digital TV includes a tuner 11 that tunes an encoded signal output from the encoder 101, and a signal tuned by the tuner 11 in an intermediate frequency (hereinafter, referred to as IF). An IF unit 12 for converting and outputting is provided. The IF unit 12 includes a channel decoder 13 for channel decoding, a T / S demux 14 for demuxing the channel decoded signal, and a video decoder 15 for decoding and restoring an image signal. Connected. The video decoder 15 is connected with a format converter 16 for converting the output video signal to meet the display standard, and an OSGM 17 for receiving the format converted signal. In addition, a first memory 151, a second memory 161, and a third memory 171 are connected to the video decoder 15, the format converter 16, and the OSGM 17, respectively. Each of the memories 151, 161, and 171 is connected to the host processor 20 in a state capable of inputting / outputting. The output terminal of the OSGM 17 is connected with a CRT driver 18 and a CRT 19 for outputting a video signal.

The operation of the digital TV system capable of diagnosing the fault according to the present invention configured as described above will be described.

In FIG. 1, the PC 100 outputs a test screen, which is a specific screen for testing, to the encoder 101 in the form of a bit stream, and the test screen and a test time point to the host processor 20 in the digital TV. Print all data. The encoder 101 encodes the image data input from the PC 100 in accordance with the format of the digital TV and outputs it to the tuner 11. The tuner 11 tunes the video data input from the encoder 101 and outputs it to the IF unit 12. The IF unit 12 processes the image data received from the tuner 11 and outputs an IF signal to the channel decoder 13. The channel decoder 13 receives the IF signal and decodes the channel. The channel decoded signal is input to the T / S demux 14. In the case of a digital broadcast signal from a broadcasting station, the T / S demux 14 separates video, audio, and other data multiplexed into the broadcast signal. The video data is output to the video decoder 15. At this time, voice and other data are processed separately. Meanwhile, in the case of test image data from a PC, since only image data exists, the channel decoded signal is directly output to the video decoder 15 without having to demux separately. The video decoder 15 decodes the input image data and outputs the decoded image data to the format converter 16 and the first memory 151. Data decoded from the video decoder 15 is stored in the first memory 151. The format converter 16 converts the image data input from the video decoder 15 to meet the display standard. The image data formatted by the format converter 16 is stored in the second memory 161. In addition, the format-converted image data is input to an On Screen Graphic Mixer (hereinafter referred to as OSGM), and when the OSGM 17 is a digital broadcast signal from a broadcasting station, the format from the format converter 16 is used. The CRT driver 18 outputs a text signal (OSD) to be displayed on the screen of the converted image data and additional information (emergency news, teletext (TTX) information, etc.) applied from the host processor 20. On the other hand, in the case of test image data from a PC, the format-converted image signal of the format converter 16 is output to the CRT driver 18 and the third memory 171. The third memory 171 stores the input image data to be output. The CRT driver 18 is driven by the output signal of the OSGM 17 to display the test image output from the PC 100 on the CRT 19. In this case, the host processor 20 controls each component such that the test image of the PC 100 is output to the CRT 19. The host processor 20 first stops the OSGM 17 and checks the data of the third memory 171 in order to check the test image data from the PC 100 and the restored data in the functional block in the digital TV. Is read through DMA (Direct Memory Access). The host processor 20 compares the reconstructed data of the OSGM 17 read out from the third memory 171 with the test image data, and if the screen abnormality does not occur, all the front ends of the host processor 20 determine that the abnormality is good, and the screen abnormality occurs. In this case, the host processor 20 stops the format converter 16 of the previous stage and reads the data of the second memory 161 through the DMA. The host processor 20 compares the restored data of the format converter 16 read out from the second memory 161 with the test image data, and outputs the output data of the video decoder 15 in the same manner. If the screen error occurs by reading the data stored in the first memory 151 and comparing the data restored by the video decoder 15 with the test image data, it is determined that the previous block is broken. The host processor 20 compares the reconstructed data of the respective functional blocks with the test image data as described above to determine whether each functional block has failed. In this way, the host processor 20 outputs a failure diagnosis signal of the corresponding function block to the external PC 100 through the UART, if the screen abnormality of the corresponding function block is detected.

As described above, the present invention provides the effect that the user can quickly deal with such a request for A / S by recognizing the failure of the digital TV.

Claims (4)

In digital TV, A PC for outputting test image data of a specific screen for diagnosing failure of each functional block of the digital TV; An encoder which receives image data from the PC, encodes the signal according to the signal format of the digital TV, and supplies the encoded data to the digital TV; Functional blocks of a digital TV receiving the test image data encoded by the encoder and performing the same process as the process of allowing the digital broadcasting signal to be viewed; A plurality of memories for storing data restored in each of the functional blocks; And After reading the data restored in the memory of the last block among the functional blocks to be examined and comparing the previously stored test image data with the previously stored test image data, if the abnormality is detected, the data restored in the previous memory order is detected to detect the abnormality. And a host processor for outputting a fault diagnosis signal to the PC. The method of claim 1, wherein the test object of the functional blocks A video decoder that decodes the image data output from the front functional block from the encoded data; A format converter for converting decoded image data from the video decoder into a format to be displayed; And And an OSGM for outputting the format-converted image data as image data to be output on the screen. The memory of claim 2, wherein the plurality of memories A first memory for storing decoded image data of the video decoder; A second memory configured to store format converted image data of the format converter; And And a third memory for storing image data to be outputted on the screen of the OSGM. The method of claim 3, wherein the host processor And control to read in the order of the third memory, the second memory, and the first memory.