• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing an OSD screen flicker by erasing a video field of a television, wherein by storing only one predetermined field in storing a video signal in a field memory of a television, the flicker phenomenon can be eliminated during OSD screen output. By reducing eye strain, the tuner 4 to which a predetermined television channel is tuned, the image IF unit 6 to amplify the tuned video signal, and the detector to extract the original video signal from the modulated wave (8) a low frequency amplifier 10 for low frequency amplifying the detected video signal, an image processor 24 for image processing the amplified video signal, and for displaying the execution or setting state of the overall functions assigned to the television. In a television having an OSD processing unit 20 for generating an OSD signal, a synchronization component for separating only a synchronization signal from an image signal applied by the low frequency amplifier 10. A unit 12, an analog-digital converter 14 for converting an analog image signal applied from the low frequency amplifier 10 into a digital signal, and a state in which an OSD signal output function is executed by the OSD processing unit 20 Field memory 16 for selectively storing and outputting only one predetermined field out of two fields of the image signal applied by the analog-digital converter 14 at the time of outputting the OSD signal by the OSD processing unit 20 Memory control unit 18 which performs timing control of the recording / reading operation such that the field memory 20 stores / outputs only one image field on one side, and images stored on the field memory 16 digitally. The syringe to the odd / excellent field is discriminated by the digital-analog converter 22 which converts the signal into an analog signal for reproduction output to the CRT 26 and the synchronization signal from the synchronization separator 12. And a controller 28 for applying a control signal to the memory controller 18 so that only odd or even fields may be selectively stored in the field memory 16 when an OSD screen is output on the field memory 16. Characterized in that provided with.
    公开号:KR19990033062A
    申请号:KR1019970054318
    申请日:1997-10-23
    公开日:1999-05-15
    发明作者:송복천
    申请人:전주범；대우전자 주식회사；
    IPC主号:
    专利说明:

    OS screen flicker removal device by erasing video field of TV
    The present invention relates to an OSD screen flicker removal apparatus by erasing a video field of a television. More particularly, the OSD screen output by selectively erasing the video field of a video signal when the OSD screen is reproduced with respect to the CRT of a television. The present invention relates to an OSD screen flicker removal apparatus by erasing a video field of a television for preventing a flicker phenomenon occurring at the time.
    At present, the TV scans 525 [H] horizontally from the upper left of the CRT to make one screen, first scanning from the radix field to 262.5 [H], then returning to the upper left of the CRT during the vertical return period, In other words, the interlaced scanning method is used in which the remaining 262.5 [H] scans are performed between the scan lines of the radix field to make one screen (one frame).
    In this case, the use of such interlaced scanning method for outputting a TV image can reduce the flicker phenomenon of the TV image screen without increasing the required frequency band. The flicker phenomenon is a TV image screen or a fluorescent lamp. Periodic change in luminance, such as flashing light, refers to what is felt visually.
    As mentioned above, the TV screen goes through two scanning processes when creating one frame. Since 30 screens are sent to the screen for one second, the time required to construct one screen is approximately 1 /. Since it takes about 30 seconds, a single screen is made through two scanning processes, so the time required for one injection is about 1/60 seconds.
    In addition, when the OSD (On Screen Display) screen is provided and output on the image output screen as described above, the control unit reads the contents of the OSD memory and displays a text signal to indicate execution state or setting of a corresponding function in the OSD generating unit. After the pre-processing to generate a, interlaced scans are synthesized for each image field in two scanning processes of the radix field and the even field as in the above method.
    However, the OSD character on the screen including the OSD is configured to be contrasted in color and brightness with the video screen that is the background on the screen so that the viewer can easily recognize the OSD. When the video screen including the OSD signal is generated, unlike the general video output screen, the flicker phenomenon caused by the 1/60 second parallax between the even field and the odd field is easily felt, resulting in eye fatigue.
    Accordingly, the present invention has been made in view of the above circumstances, and in each television frame having an output display function of OSD display information, an image signal according to the television broadcast is displayed for each image frame at the time of displaying the OSD display information related to execution of a predetermined function. It is possible to provide an OSD screen flicker removal apparatus by erasing video fields of a television for eliminating flicker that occurs when outputting an OSD screen by erasing one field so that only one field can be reproduced for one frame. The purpose is.
    According to one embodiment of the present invention for carrying out the above object, a tuner in which a predetermined television channel is tuned, an image IF unit for intermediately amplifying the selected video signal, and a detection for extracting an original video signal from a modulated wave. A low frequency amplifier for low frequency amplifying the detected video signal, an image processor for image processing the amplified video signal, and an OSD processing unit for generating an OSD signal for displaying the execution or setting of the overall function assigned to the television. A television comprising: a synchronization separator for separating only a synchronization signal from an image signal applied by the low frequency amplifier, an analog-digital converter for converting an analog image signal applied from the low frequency amplifier into a digital signal, and the OSD processing unit 2 of the image signal applied from the analog-digital converter in the state that the output function of the OSD signal by the A field memory for selectively storing and outputting only one predetermined field, and a recording / reading operation for allowing the field memory to store / output only an image field of one side in a function of outputting an OSD signal by the OSD processing unit. A memory controller which performs timing control, a digital-to-analog converter that converts a video signal stored digitally on the field memory into an analog signal for reproduction and output to a CRT, and an odd number by the synchronization signal from the synchronization separator. And a control unit for discriminating between syringes of the even field, and applying a control signal to the memory control unit so that only the odd field or even field may be stored in the field memory when the OSD screen is displayed on the field memory. OSD screen flicker removal by erasing video field of TV Provide value.
    According to the present invention having the above-described configuration, a flicker phenomenon generated when an OSD screen is output by storing only one field in one frame of a video signal in a field memory that digitally stores and reproduces a video signal To be removed.
    1 is a block diagram showing the configuration of an OSD screen flicker removal apparatus by video field erasing of a television according to the present invention;
    FIG. 2A is a diagram illustrating a state in which only one field of a frame of a video signal is selected for screen reproduction according to a preferred embodiment of the present invention; FIG.
    2B is a diagram illustrating a scanning line as an example in which one side field of an image signal is erased according to the present invention.
    * Setting of symbols for the main parts of drawings
    4: tuner, 6: video IF section,
    8: detector, 10: low frequency amplifier,
    12: synchronous separator, 14: analog-to-digital converter,
    16: field memory, 18: memory control unit,
    20: OSD processing unit, 22: digital-to-analog converter,
    24: image processing unit, 28: control unit.
    Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention.
    First, Fig. 1 is a block diagram showing the configuration of an OSD picture flicker removal apparatus by video field erasing of a television according to the present invention. Reference numeral 4 denotes a channel to be received from among a plurality of high frequency signals induced in the antenna 2. A tuner that selects a high frequency signal, tunes to tuning data of a specific channel applied by the controller 28 to be described later, extracts a broadcast signal transmitted to the channel to be tuned, and converts and outputs an intermediate frequency (IF). Indicates.
    Reference numeral 6 denotes an image IF unit for amplifying the intermediate frequency signal drawn from the tuner 4 to the size and volume required for the picture tube. In general, an intercarrier for simultaneously amplifying two intermediate frequency signals such as video and audio Use the method.
    Reference numeral 8 denotes a detector which detects the original signal from the modulated wave. In the heterodyne method, linear detection with good characteristics is used. In the past, a large number of bipolar tubes are used, but semiconductor diodes are used.
    10 is a low frequency amplification unit for amplifying the image signal wave applied through the detector 8, and divides the overall gain of the image IF unit 6 and the receiver, and usually performs a class A distortion-free amplification to decrease the fidelity. Do not Also, push-pull amplification is usually used when it is necessary to reduce relatively large distortion.
    12 denotes a synchronization signal separation unit for separating the synchronization signal among the signals of the television by using the difference in amplitude between the synchronization signal and the video signal, which are signals amplified by the low frequency amplifier 10, and the separation of the synchronization signal for the separation of the synchronization signal. Using the off characteristic, an amplitude separation method is used in which only the synchronous signal period is conducted to extract the video signal portion and extract only the signal in the synchronous signal period.
    14 shows an analog-digital converter (ADC) for converting an image signal, which is an analog signal applied from the low frequency amplifier 10, into a digital signal.
    16 is a field memory for digitally storing / maintaining one screen of a television, wherein the field memory 16 is subjected to timing control of a recording / reading period by a memory controller 18 described later in the OSD output function. Only the video of one field among the odd / excellent fields according to the video signal of the broadcast is selectively stored.
    18 generates a write enable / lead enable signal for storing only the video signal located on one field in the field memory 16 in the field memory on the field memory 16, and separates the synchronous separation. A memory control section for generating a clock for synchronizing the write / read period of the field memory 16 with the synchronization signal from the section 12 is shown.
    20 generates an on-screen display (OSD) signal for displaying the audio / video processing mode and the processing state and / or the changing channel under the control of the control unit 28 to be described later and applies it to the image processing unit 24 to be described later. An OSD processing unit is shown.
    24 denotes a reproduction process based on a processing mode (e.g., adjustment of luminance, contrast, color amount, color purity, etc.) of a video signal set by a remote controller (not shown) with respect to the video signal applied by IF conversion in the tuner 4; An image processing unit is shown, and a CRT which reproduces and outputs an image signal processed by the image processing unit 24 is shown.
    28 is a horizontal / vertical synchronous signal from an image signal applied from the tuner 4 in the state in which an OSD signal for executing a predetermined function assigned to the television and displaying a setting state is generated by the OSD processing unit 20. Counting the output of the detecting sync section 12 to detect the video scanning period of the odd field / excellent field (that is, each odd field / excellent field has a period of 1/60 sec), and based on the count result To control the memory controller 18 to generate a control signal for selectively storing and outputting only one predetermined field in the field memory 16, wherein the controller 28 controls the OSD. When the OSD signal is generated by the processor 20, the display timing control is performed so that the OSD signal is generated only between syringes for a predetermined one field selectively stored / output in the field memory 16. It is further comprising,
    Hereinafter, the operation of the OSD screen flicker removal apparatus by video field erasing of a television according to the present invention having the above-described configuration will be described in detail with reference to the drawings.
    First, the tuner 4 selects a high frequency signal of a channel to be received from a plurality of high frequency signals induced by the antenna 2, and tunes to tuning data (not shown) of a specific channel applied by the controller 14. The broadcast signal is taken out and converted to an intermediate frequency and applied to the video IF unit 6.
    Then, the image IF unit 6 amplifies the intermediate frequency signal drawn from the tuner 4 to the size and volume required for the water pipe, and the detector 8 converts the intermediate frequency signal from the image IF unit 6 to the intermediate. The original video signal is extracted from the frequency-modulated wave.
    The video signal is amplified while passing through the low frequency amplification section 10 again, and only the sync signal is separated from the television video signal while passing through the sync separation section 12.
    In this state, the signal that has passed the low frequency amplifier 10 again, that is, the video signal as shown in the upper portion of FIG. 2A passes through the analog-to-digital converter 14, and the analog video signal is a digital signal corresponding thereto. In this case, the clock is outputted from the synchronization separator 12 to the memory controller 18 by counting the period of the odd field / excellent field from the control unit 28 to the memory controller 18 to supply the output to the ADC 14. Provide the required clock.
    In addition, the image signal passing through the ADC 14 is digitally stored in the field memory 16 again, and the write enable / lead of data to be stored in the field memory 16 in the memory controller 18 is performed. An enable signal is generated, and a clock is generated to enable the write / read signal.
    At this time, the controller 28 determines the interval between the syringes of the odd / excellent field by the synchronization signal from the synchronization separator 12, and outputs the field memory 16 when the OSD screen is output on the field memory 16. The control signal is applied to the memory controller 18 so that only odd or even fields may be selectively stored.
    Then, in the memory controller 18, when the OSD signal is output by the OSD processor 20, the recording / reading operation is performed so that the field memory 16 stores / outputs only one image field on one side. Generates a control signal for performing control.
    The frame of one screen of a television is composed of two fields, and the memory of the first to second fields and the 525th line of the immediately preceding frame is stored in the memory, and the vertical synchronization period of the first field and the second field is stored in the memory. Configure on the cell.
    For example, as shown in the lower part of FIG. 2A, when the write / lead enable signal of the even field is generated in the memory controller 18, the signal corresponding to the read / write is not generated in the odd field.
    On the other hand, the digital-to-analog converter 22 is passed to convert the video signal stored on the field memory 16 into an analog signal for image processing and reproduction.
    In addition, an image signal converted into an analog signal through the digital-to-analog converter (DAC) passes through the image processing unit 24 while the processing mode (eg, luminance, contrast, color amount) of the image signal set by the remote controller (not shown). Reproduction processing based on the color purity, etc.) and output the processed video signal to the CRT 26.
    In this case, the video signal output to the CRT 26 is erased by one of two fields stored in the field memory 16 by the memory controller 18 under the control of the controller 28. The flicker phenomenon generated when the video signal including the signal is reproduced can be eliminated.
    On the other hand, the OSD screen flicker removal apparatus by video field erasing of the television according to the present invention can be applied to a video reproducing output device such as VTR, VCR, LDP without departing from the technical idea and the gist.
    As described above, according to the OSD screen flicker removal apparatus by video field erasing of a television according to the present invention, the flicker phenomenon is eliminated during OSD screen output by storing only one predetermined field in storing a video signal in the TV field memory. It can help to reduce the effects of eye strain.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] A tuner 4 to which a predetermined television channel is tuned, an image IF unit 6 for amplifying the selected video signal at an intermediate frequency, a detector 8 for extracting the original video signal from the modulated wave, and a detected video signal. Low frequency amplifier 10 for low frequency amplification, an image processor 24 for image processing the amplified video signal, and an OSD processor 20 for generating an OSD signal for displaying the execution or setting state of the overall functions assigned to the television. In a television equipped with
    A synchronization separator 12 for separating only the synchronization signal from the image signal applied by the low frequency amplifier 10;
    An analog-digital converter 14 for converting an analog image signal applied from the low frequency amplifier 10 into a digital signal;
    Field memory 16 for selectively storing and outputting only one predetermined field among two fields of the video signal applied by the analog-digital converter 14 while the OSD signal output function is executed by the OSD processing unit 20. ),
    A memory controller 18 which performs timing control of a write / read operation such that the field memory 16 stores / outputs only one image field on one side when the OSD signal is output by the OSD processor 20;
    A digital-to-analog converter 22 for converting an image signal stored digitally on the field memory 16 into an analog signal for reproduction and output to the CRT 26;
    By discriminating between the syringes of the odd / excellent field by the synchronization signal from the sync separator 12, only the odd field or even field in the field memory 16 is displayed when the OSD screen is displayed on the field memory 16. And a control unit (28) for applying a control signal to the memory control unit (18) so as to be selectively stored.
    [2" claim-type="Currently amended] The method of claim 1, wherein the controller 28 generates the OSD signal only between syringes for a predetermined one field selectively stored / outputted in the field memory 16 when the OSD signal is generated by the OSD processing unit 20. OSD screen flicker removal apparatus by erasing the video field of a television, characterized in that to perform the display timing control to achieve this.
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    同族专利:
    公开号 | 公开日
    KR100247095B1|2000-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-10-23|Application filed by 전주범, 대우전자 주식회사
    1997-10-23|Priority to KR1019970054318A
    1999-05-15|Publication of KR19990033062A
    2000-03-15|Application granted
    2000-03-15|Publication of KR100247095B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970054318A|KR100247095B1|1997-10-23|1997-10-23|Flicker`s reducing apparatus of on-screen display by erasing a video field of television|
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