KR920008422Y1 - Spatial interpolation filter circuit of hdtv - Google Patents
Spatial interpolation filter circuit of hdtv Download PDFInfo
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- KR920008422Y1 KR920008422Y1 KR2019880021368U KR880021368U KR920008422Y1 KR 920008422 Y1 KR920008422 Y1 KR 920008422Y1 KR 2019880021368 U KR2019880021368 U KR 2019880021368U KR 880021368 U KR880021368 U KR 880021368U KR 920008422 Y1 KR920008422 Y1 KR 920008422Y1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/797—Processing of colour television signals in connection with recording for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal
- H04N9/7973—Processing of colour television signals in connection with recording for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal by dividing the luminance or colour component signal samples or frequency bands among a plurality of recording channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0135—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving interpolation processes
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H2017/0072—Theoretical filter design
- H03H2017/0081—Theoretical filter design of FIR filters
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- Processing Of Color Television Signals (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 회로 블럭도.1 is a conventional circuit block diagram.
제2도는 본 고안의 전체회로 블럭도.2 is an overall circuit block diagram of the present invention.
제3도는 본 고안의 수평기간 지연부의 상세 블럭도.3 is a detailed block diagram of a horizontal period delay unit of the present invention.
제4도는 본 고안의 FIR필터의 상세 블럭도.4 is a detailed block diagram of the FIR filter of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 디멀티플렉서 20a, 20b, 100 : 수평기간지연부10: demultiplexer 20a, 20b, 100: horizontal period delay unit
30 : 휘도신호 처리부 40 : 색신호 처리부30: luminance signal processing unit 40: color signal processing unit
31-33n, 41-43n, 101-103n : FIR필터31-33n, 41-43n, 101-103n: FIR filter
50 : 멀티플렉서50: multiplexer
201-208 : 수평기간 지연회로 211-213, 321, 322 : 가산기201-208: Horizontal period delay circuit 211-213, 321, 322: Adder
221-223 : 승산기 301-307 : 계수 ROM221-223: Multiplier 301-307: Coefficient ROM
311-314 : 플립플롭311-314: Flip-flop
본 고안은 고선명 TV의 공간 내삽 필터(Spatial Interpolation Filter)회로에 관한 것겻으로, 특히 고선명 TV신호의 수신처리에서 서브 샘플링(Sub-Sampling)된 화상신호를 공간적으로 내삽 처리하는 디지틀 필티회로에 관한 것이다.The present invention relates to a spatial interpolation filter circuit of high-definition TV, and more particularly, to a digital filtration circuit for spatially interpolating a sub-sampled image signal in a high-definition TV signal reception process. .
또한 본 고안의 공간 내삽 필터는 고선명 TV의 휘도신호 및 색신호가 시분할 다중 되어 수신되는 점을 감안하여 하나의 하드웨어 구조에서 휘도 신호와 색신호를 모두 내삽 처리할 수 있도록 구성한 것이다.In addition, the spatial interpolation filter of the present invention is configured to interpolate both the luminance signal and the color signal in one hardware structure in consideration of the fact that the luminance signal and the color signal of the high definition TV are received by time division multiplexing.
종래의 고선명 TV수신장치에서는 제1도에 도시한 바와 같이 서브 샘플링되어 수신되는 고선명 TV의 동(Dynamic)화상신호를 확실하게 내삽하기 위해서 다수의 공간 내삽 필터를 사용한다.In the conventional high-definition TV receiver, as shown in FIG. 1, a plurality of spatial interpolation filters are used to reliably interpolate a dynamic image signal of a high-definition TV received by subsampling.
그러나 상기 필터는 휘도신호와 색신호간에 FIR필터들의 계수값들이 서로 다른 관계로 같은 형태의 FIR필터 각각에 휘도신호 처리용 계수 ROM과 색신호 처리용 계수 ROM을 따로 기록해 넣어야 한다.However, the filter has to separately record the luminance signal processing coefficient ROM and the color signal processing coefficient ROM separately in the same type of FIR filter because the coefficient values of the FIR filters are different between the luminance signal and the color signal.
이러한 형태의 공간 내삽 필터는 고선명 TV의 영상신호가 색신호와 휘도신호로 시분할 다중회되는 관계로 실제 휘도신호가 공간 내삽 필터에서 처리되는 기간 중에는 색신호가 처리되지 않으며, 반대로 색신호가 처리되는 기간중에는 휘도신호가 처리되지 않아 필터 구성상에 낭비뿐만 아니라 공간 내삽 필터의 구성을 복잡하게, 하는 문제점이 있었다.In this type of spatial interpolation filter, since a video signal of a high definition TV is time-division-multiplexed into a color signal and a luminance signal, the color signal is not processed while the actual luminance signal is processed by the spatial interpolation filter. There was a problem that the signal was not processed, which not only wasted on the filter configuration but also complicated the configuration of the spatial interpolation filter.
따라서 본 고안은 상기와 같은 문제점을 해결하기 위하여 창안한 것인바. 고선명 TV의 공간 내삽 필터는 휘도신호 및 색신호가 시분할 다중되어 수신되는 점을 감안하여 하나의 하드웨어 구조로 구성된 필터에서 휘도신호가 입력될때는 필터의 계수 ROM의 계수값이 휘도신호 처리용 계수값으로 처리할 수 있도록 하고, 색신호가 입력될때는 필터계수 ROM의 계수값이 색신호 처리용 계수값으로 처리할 수 있도록 계수 ROM의 계수값을 스위칭 시켜 줌으로써 휘도신호와 색신호 입력에 따라 하나의 내삽필터에서 모두 내삽 처리할 수 있도록 함에 그 목적이 있는 것이다.Therefore, the present invention is invented to solve the above problems. The spatial interpolation filter of high-definition TV receives the luminance signal and the color signal by time division multiplexing, and when the luminance signal is input from the filter composed of one hardware structure, the coefficient value of the filter ROM of the filter is used as the coefficient value for luminance signal processing. When the color signal is inputted, the coefficient value of the filter coefficient ROM is switched so that the coefficient value of the filter coefficient ROM can be processed as the color signal processing coefficient value. The purpose is to allow interpolation.
상기한 목적을 달성하기 위한 수단으로는 수직 방향으로 휘도신호와 색신호의 수평기간 지연부를 하나로 통합시켜 구성하고, 수직방향으로 내삽하기 위한 필터를 휘도신호 처리용 필터와 색신호 처리용 필터를 하나로 통합하여 구성함을 특징으로 한다.As a means for achieving the above object, the luminance signal and the horizontal signal delay unit of the color signal are integrated in one vertical direction, and the filter for interpolation in the vertical direction is integrated with the luminance signal processing filter and the color signal processing filter into one. It is characterized by the configuration.
이하첨부된 도면에 의하여 본 고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the attached drawings.
제2도는 본 고안의 블럭도로서, 입력되는 영상신호를 수평방향으로 내삽하기 위한 제1도의 휘도 신호 수평기간 지연부(20a)와 색신호 수평기간 지연부(20b)를 하나로 통합시켜 수평기간지연부(100)로 구성하고, 수평방향으로 내삽하기 위한 FIR필터(101-103n)를 구성하되 이는 제1도의 휘도신호처리용 FIR필터(31∼33n)와 색신호 처리용 FIR필터(41∼43n)를 통합하도록 한다.2 is a block diagram of the present invention, in which the horizontal signal delay unit 20a and the color signal horizontal period delay unit 20b of FIG. 1 for interpolating the input image signal in the horizontal direction are integrated into one. And an FIR filter 101-103n for interpolating in the horizontal direction, which constitutes the luminance signal processing FIR filters 31 to 33n and the color signal processing FIR filters 41 to 43n. To be integrated.
상기 통합된 공간내삽 FIR필터(101∼103n)는 휘도 및 색 컨트롤신호(Y/C)에 따라 전체블럭이 휘도신호 처리 상태와 색신호 처리상태로 스위칭 전환되도록 한다.The integrated spatial interpolation FIR filters 101 to 103n allow the entire block to be switched between the luminance signal processing state and the color signal processing state in accordance with the luminance and color control signals Y / C.
상기 컨트롤신호(Y/C)가 하이이면 전체블럭은 휘도신호 처리상태가 되고, 로우이면 색신호 처리상태로 되도록 한다.If the control signal Y / C is high, the entire block is in the luminance signal processing state, and if it is low, it is in the color signal processing state.
한편 제3도는 제2도에서 수평기간 지연부(100)의 상세블럭도이고, 제4도는 FIR필터(101∼103n)의 상세 블럭도이며, 제4도의 계수 ROM(301∼307)에는 어드레스 최상위 비트에 휘도 및 색 컨트롤신호가 인가되도록하여 최상위비트(MSB)가 "1"이면 휘도신호 계수값이 입력값 곱해져 출력되고, "0"이면 색신호값이 입력값에 곱해져 출력되도록 구성한다.FIG. 3 is a detailed block diagram of the horizontal period delay unit 100 in FIG. 2, and FIG. 4 is a detailed block diagram of the FIR filters 101 to 103n. The coefficient ROMs 301 to 307 of FIG. The luminance and color control signals are applied to the bits. If the most significant bit MSB is "1", the luminance signal count value is multiplied by the input value, and if it is "0", the color signal values are multiplied and output to the input value.
이하 이들의 동작 및 작용효과를 설명한다.The operation and effect of these will be described below.
고선면 TV용 전송신호는 라인(Line)당 480샘플의 디지틀 신호가 아날로그로 전송된다.In the transmission signal for high-definition TV, 480 samples of digital signal per line are transmitted analog.
고선명 TV 수신장치에서는 입력된 아날로그 전송신호를 디지틀신호로 변환하여 정지화신호와 동화상신호로 구분하여 신호처리하게 된다.In the high definition TV receiver, the input analog transmission signal is converted into a digital signal and divided into a still picture signal and a moving picture signal for signal processing.
이때 상기 아날로그 신호에서 디지틀 신호로 바뀐 전송신호는 13번째 샘플부터 106번째 샘플까지는 색신호샘플이고, 107번째 샘플부터 480번째 샘플까지는 휘도신호 샘플이다.In this case, the transmission signal changed from the analog signal to the digital signal is a color signal sample from the 13 th sample to the 106 th sample and a luminance signal sample from the 107 th sample to the 480 th sample.
상기 동화상신호릍 처리하기 위해서는 2차원 공간 내삽을 행하게 되는데, 이 2차원 공간 내삽의 목적은 고선명 TV의 전송신호중 동화상에 해당하는 경우에 전송을 위해 송신축에서 압축시킨 화상 데이타를 내삽처리하여 복윈시키는데 있다.In order to process the moving picture signal, two-dimensional space interpolation is performed. The purpose of this two-dimensional space interpolation is to interpolate and recover the image data compressed on the transmission axis for transmission in the case of a moving picture among the transmission signals of a high definition TV. have.
따라서 공간내삽필터(101-103n)에는 전송된 두(회도, 색)샘플사이에 전송되지 않는 화소(Pixel)를 전송된 회소간에 상관관계를 통해 내삽하여 복원하게 된다.Therefore, the spatial interpolation filters 101-103n interpolate and restore the pixels Pixel which are not transmitted between the two (gray, color) samples transmitted through correlation between the transmitted elements.
이러한 복원작업은 휘도신호의 경우에는 수직방향으로 1수평라인 단위로 지연된 화소간에 상관관계를 취하지만, 색신호의 경우에는 두종류(광대역과 협대역)의 색신호가 매 라인마다 번갈아가며 전송되는 관계로 수직방향으로, 2수평라인 단위로 지연시켜 화소간의 상관관계를 취하여야 한다.In the case of the luminance signal, the restoration operation has a correlation between the pixels delayed by one horizontal line unit in the vertical direction, but in the case of the color signal, two kinds of color signals (broadband and narrowband) are alternately transmitted every line. In the vertical direction, the pixels should be correlated by delaying by two horizontal lines.
이와같은 동작을 위하여 본 고안에서는 제2도에 도시한 바와같이 수평기간 지연부(201-208)에서 휘도신호가 입력되는 기간동안은 1수평주기 단위로 지연시켜 처리된 지연회로(202∼206)의 출력이 가산기(211∼212)및 승산기(221,222)를 통하여 출력되고, 색신호가 입력되는 기간동안은 2수평주기단위로 지연시켜 처리된 지연회로(202, 204, 206, 208)의 출력이 지연회로(201)의 입력신호와 함께 가산기(212-213)에서 가산되고 승간기(222-223)에서 승산된 후 출력된다.For this operation, as shown in FIG. 2, the delay circuits 202 to 206 processed by delaying by one horizontal period during the period in which the luminance signal is input from the horizontal period delay units 201 to 208, as shown in FIG. Is output through the adders 211 to 212 and the multipliers 221 and 222, and the output of the delay circuits 202, 204, 206, and 208 which is processed by delaying by two horizontal periods during the period in which the color signal is input is delayed. It is added by the adders 212-213 together with the input signal of the circuit 201 and multiplied by the multipliers 222-223 and then output.
이렇게 수직방향으로 처리된 출력은 매출력당 제4도에 도시한 바와 같이 구성되는 FIR필터를 거쳐서 수평방향으로의 상관관계를 통해 전송되지 않은 화소를 복원하게 된다.The output processed in the vertical direction restores the untransmitted pixel through the correlation in the horizontal direction through the FIR filter configured as shown in FIG.
이를 좀더 상세히 설명한다.This is explained in more detail.
상기 FIR필터의 내부 구성을 도시한 제4도에서 휘도신호가 입력될때는 계수 ROM(301-307)의 어드레스 입력 최상위비트(MSB)가 하이("1")가 되어 플립플롭(311-314)을 통한 입력신호에 대해 휘도신호용 계수가 곱해져 ROM(301∼307)에서 출력되어 FIR필터 전블럭이 휘도신호 처리용 필터로서 동작하게 된다.When the luminance signal is input in FIG. 4 showing the internal structure of the FIR filter, the address input most significant bit MSB of the coefficients ROM 301-307 becomes high (" 1 ") and flip-flops 311-314. The luminance signal coefficient is multiplied by the input signal through the output signal from the ROMs 301 to 307 so that all the FIR filters operate as the luminance signal processing filter.
한편 색신호가 입력될때는 상기 계수 ROM(301-307)의 계수값이 색신호용 계수값이 곱해지도록 계수 ROM의 최상위비트(MSB)가 로우("0")가 되도록 함으로써 상기 휘도신호 입력시와 같은 동작으로 전블럭이 색신호처리용 필터로서 동작하게 된다.On the other hand, when a color signal is input, the most significant bit (MSB) of the coefficient ROM is set low ("0") so that the coefficient value of the coefficient ROMs 301-307 is multiplied by the coefficient value for the color signal. In operation, all blocks operate as filters for color signal processing.
이상에서 설명한 바와 같이 본 고안에 의한 고선명 TV수신장치용 공간 내삽 필터는 휘도신호 및 색신호처리시 하나의 하드웨어가 전환되어 동작함으로써 고선명 TV수신장치의 공간 내삽 필터 구성에 들어가는 하드 웨어의 절대량을 감소시켜 구성을 간단하게 하고, 시스템의 원가를 감소시키는 효과가 있는 것이다.As described above, the spatial interpolation filter for high-definition TV receiver according to the present invention reduces the absolute amount of hardware that enters the spatial interpolation filter configuration of the high-definition TV receiver by operating one hardware during the processing of the luminance signal and the color signal. The effect is to simplify the configuration and reduce the cost of the system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880021368U KR920008422Y1 (en) | 1988-12-23 | 1988-12-23 | Spatial interpolation filter circuit of hdtv |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880021368U KR920008422Y1 (en) | 1988-12-23 | 1988-12-23 | Spatial interpolation filter circuit of hdtv |
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| Publication Number | Publication Date |
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| KR900013787U KR900013787U (en) | 1990-07-06 |
| KR920008422Y1 true KR920008422Y1 (en) | 1992-11-21 |
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| KR2019880021368U KR920008422Y1 (en) | 1988-12-23 | 1988-12-23 | Spatial interpolation filter circuit of hdtv |
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