KR930019024A - Video signal coding device - Google Patents

Video signal coding device Download PDF

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Publication number
KR930019024A
KR930019024A KR1019930002122A KR930002122A KR930019024A KR 930019024 A KR930019024 A KR 930019024A KR 1019930002122 A KR1019930002122 A KR 1019930002122A KR 930002122 A KR930002122 A KR 930002122A KR 930019024 A KR930019024 A KR 930019024A
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South Korea
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unit
encoding
region
video signal
activity
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KR1019930002122A
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Korean (ko)
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KR960001518B1 (en
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정태윤
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김광호
삼성전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/28—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical producing multiple scanning, i.e. using more than one spot at the same time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Color Television Systems (AREA)

Abstract

본 발명은 디지탈 처리된 1프레임의 컴포넌트 TV용 영산신호를 수직부표본화의 라인순서로 포맷하고 소정의 블럭단위로 DCT계수를 구하여 양자화한 후 가변장부호화하는 영상신호부호화장치에 관한 것으로, 수직부표본화의 라인순서로 포맷된 영상정보데이타중 정보의 변화량이 많은 변화부와 변화량이 적은 평탄부가 골고루 분포되도록 영상데이타를 소정의 블럭단위로 재구성하는 스크램블링 수단(20)과, DCT계수의 수평 및 수직방향투영합과 블럭액티비티를 각각 구하여 부호화영역 및 양자화간격크기를 결정하는 액티비티산출수단(40)과, 부호화영역에 따라서 상기 양자화된 데이타에 대한 주사를 적응적으로 수행하는 적응주사수단(60)및, 소정의 전송속도와 일치하게 상기 가변장부호화된 데이타를 소정의 고정장단위로 순차전송하는 순차전송수단(80)를 포함하는 것이 특징이다.The present invention relates to a video signal encoding apparatus for converting digitally processed one-frame component TV commercial signals in vertical subsampling line order, obtaining DCT coefficients in predetermined block units, quantizing them, and then performing variable length encoding. Scrambling means 20 for reconstructing the image data in predetermined block units so that the change portion having a large amount of change and the flat portion having a small amount of change among the image information data formatted in the line order of sampling, and horizontal and vertical of the DCT coefficient An activity calculating means 40 for determining a coding region and a quantization interval size by obtaining a direction projection sum and a block activity, and adaptive scanning means 60 for adaptively scanning the quantized data according to the coding region; A sequential number of transmissions for sequentially transmitting the variable length coded data in predetermined fixed length units in accordance with a predetermined transmission rate It is characterized by containing 80.

Description

영상신호 부호화장치Video signal coding device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 제1실시예를 나타낸 블럭도.1 is a block diagram showing a first embodiment of the present invention.

제2도의 (a) 및 (b)는 1프레임의 영상데이타 신호가 제1도의 데이타포맷부(10)를 거치기 전과 후의 데이타형식을 각각 나타낸 도면.(A) and (b) of FIG. 2 show the data format before and after the video data signal of one frame passes through the data format section 10 of FIG.

제3도는 본 발명에 따른 스크램블링(scrambling)의 원리를 나타낸 도면.3 shows the principle of scrambling according to the invention.

제4도는 이산여현변환(DCT)계수의 행렬을 나타낸 도면.4 is a matrix of discrete cosine transform (DCT) coefficients.

제5도는 투영합을 구하는 원리를 나타낸 도면.5 is a diagram showing the principle of obtaining the projection sum.

제6도는 영상의 성질을 따른 DCT계수의 분포를 나타낸 도면.6 is a diagram showing a distribution of DCT coefficients according to characteristics of an image.

제7도는 화면의 부호화 영역을 예를 들어 나타낸 도면.7 is a diagram illustrating an encoding region of a screen as an example.

제8도는 본 발명에 따른 블럭의 순차전송순서를 나타낸 도면.8 is a sequential transmission order of blocks according to the present invention.

Claims (7)

디지탈 신호처리된 컴포넌트 TV용 영상신호를 부호화하는 장치에 있어서, 상기 영상신호의 휘도(Y) 신호와 색차(R-Y,B-Y) 신호들의 비를 수직부표본화의 라인 선순서 4 : 2 : 0의 형식으로 변환시키는 데이타포맷부(10)와, 상기 데이타포맷부(10)로 부터 제공되는 영상데이타 중 정보의 변화가 적은 평탄부와 정보의 변화가 많은 변화부가 골고루 분포되도록 상기 영상데이타를 소정의 블럭단위로 재구성하는 스크램블링부(20)와, 상기 스크램블링부(20)의 출력을 상기 소정의 블럭단위로 2차원 이산여현 변환부호화하는 DCT부(30)와, 상기 DCT부(30)로 부터 제공되는 상기 소정의 블럭단위의 데이타의 액티비티를 구하여 영상의 복잡도에 따라 부호화 영역과 양자화 간격크기를 결정하는 액티비티산출부(40),상기 액티비티산출부(40)의 출력에 따라 DCT계수의 양자화를 수행하는 양자화부(50)와, 상기 액티비티산출부(40)와,에 의해 결정된 부호화영역에 따라서 양자화된 데이타를 적응적으로 주사하는 적응주사부(60)와, 상기 적응주사부(60)의 출력에 대한 가변장부호화를 수행하여 발생되는 정보량을 계산하는 가변장부호화부(70) 및 상기 가변장부호화부(70)의 출력을 고정장 내에서 소정의 전송속도로 순차전송하되, 언더플로워가 발생된 블럭에는 '0'을 추가하여 상기 전송속돠와 일치시키고, 오버플로워가 발생된 블럭에는 상기 전송속도와 일치하는 정보량만을 전송하는 순차전송부(80)를 포함하는 것을 특징으로 하는 영상신호부호화장치.An apparatus for encoding a video signal for a digital signal processed component TV, wherein the ratio of the luminance (Y) signal and the color difference (RY, BY) signals of the video signal is in the form of line linear order 4: 2: 0 of vertical subsampling The data format unit 10 converts the image data into a predetermined block so that a flat portion having little change in information and a change portion having many changes in information are distributed evenly among the data format unit 10 and the image data provided from the data format unit 10. A scrambling unit 20 for reconstructing the unit, a DCT unit 30 for two-dimensional discrete cosine transform encoding the output of the scrambling unit 20 in the predetermined block unit, and the DCT unit 30 The activity calculating unit 40 determines the coding region and the quantization interval size according to the complexity of the image by obtaining the activity of the data in the predetermined block unit, and quantizes the DCT coefficient according to the output of the activity calculating unit 40. An adaptive scanning unit 60 for adaptively scanning the quantized data according to the quantization unit 50, the activity calculating unit 40, and the encoding region determined by the adaptive scanning unit 60, and the adaptive scanning unit 60 The variable length encoding unit 70 and the output of the variable length encoding unit 70 for calculating the amount of information generated by performing variable length encoding on the output are sequentially transmitted at a predetermined transmission speed in the fixed field, A video signal encoding comprising a sequential transmitter 80 which adds '0' to the generated block to match the transmission rate, and transmits only an amount of information corresponding to the transmission rate to the block in which the overflow occurs. Device. 제1항에 있어서,상기 액티비티산출부(40)는 상기 DCT부(30)의 출력으로 부터 블럭 액티비티와 수평투영합 및 수직투영합을 각각 구한 후 상기 수평투영합 및 상기 수직투영합이 상기 블럭액티비티의 소정비율에 해당하는 영역을 1차로 부호화영역으로서 결정하는 1차 부호화영역결정부(41)와, 상기 1차부호화영역결정부(41)의 출력에 따라서 양자화 간격크기를 결정하는 양자화간격크기결정부(42)와,상기 양자화간격크기에 따라 상기 블럭단위 DCT계수를 양자화하는 가양자화부(43)와, 상기 가양자화부(43)에 의해 양자화된 데이타의 고주파 영역으로 부터 상기 수평 및 수직방향 투영합을 구해 '0'이 아닌 최초의 영역을 2차부호화영역으로 결정하는 2차부호화 영역결정부(44)를 포함하는 것을 특징으로 하는 영상신호부호화장치.According to claim 1, The activity calculation unit 40 obtains a block activity, a horizontal projection sum and a vertical projection sum from the output of the DCT unit 30, respectively, the horizontal projection sum and the vertical projection sum is the block A quantization interval size for determining a quantization interval size according to the output of the primary encoding region determiner 41 and the primary encoded region determiner 41, which primarily determine an area corresponding to a predetermined ratio of the activity as an encoding region. Determining unit 42, a quantization unit 43 for quantizing the block unit DCT coefficient according to the quantization interval size, and the horizontal and vertical from the high frequency region of the data quantized by the quantization unit 43 And a secondary encoding region determiner (44) for determining the projection sum of directions and determining the first region other than '0' as the secondary encoding region. 제1항 또는 제2항에 있어서, 상기 액티비티산출부(40)는 상기 양자화간격크기를 저주파영상영역에서 보다 고주파 영상영역에서 상대적으로 크게 설정하는 것으 특징으로 하는 영상신호부호화장치.The video signal encoding apparatus of claim 1 or 2, wherein the activity calculating unit (40) sets the quantization interval size to be relatively larger in the high frequency image region than in the low frequency image region. 제1항에 있어서, 상기 적응주사부(60)는 상기 부호화여역의 가로방향길이가 세로방향길이보다 크면 상기 부호화영역을 수직주사하고, 상기 가로방향길이가 상기 세로방향길이보다 크지 않으면 상기 부호화영역을 수평 주사하는 것을 특징으로 하는 영상신호부호화장치.The encoding region of claim 1, wherein the adaptive scanning unit 60 scans the encoding region vertically when the horizontal length of the encoding region is greater than the vertical length, and the encoding region when the horizontal length is not greater than the vertical length. The video signal encoding apparatus, characterized in that the horizontal scanning. 제1항 또는 제4항에 있어서, 상기 적응주사부(60)는 실재영상의 통계치에 근거하여 결정된 주사순서로 상기 부호화영역을 주사하는 것을 특징으로 하는 영상신호 부호화장치.5. The video signal encoding apparatus according to claim 1 or 4, wherein the adaptive scanning unit (60) scans the coding region in a scanning order determined based on statistical values of real images. 제1항 또는 제2항에 있어서, 상기 액티비티산출부(40)는 상기 양자화간격크기를 짝수 및 홀수 중 어느 하나의 형태로서 결정하는 것을 특징으로 하는 영상신호부호화 장치.The video signal encoding apparatus of claim 1 or 2, wherein the activity calculation unit (40) determines the quantization interval size as one of an even number and an odd number. 제1항에 있어서, 상기 순차전송부(80)는 1프레임을 구성하는 소정갯수의 상기 블럭들로 부터 차례차례로 소정분량의 데이타를 추출하여 전송하는 것을 특징으로 하는 영상신호부호화장치.The video signal encoding apparatus of claim 1, wherein the sequentially transmitting unit (80) sequentially extracts and transmits a predetermined amount of data from the predetermined number of blocks constituting one frame. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR93002122A 1992-02-28 1993-02-16 Coding device of video signal KR960001518B1 (en)

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KR92-3169 1992-02-28
KR920003169 1992-02-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100447146B1 (en) * 1996-09-30 2004-11-06 엘지전자 주식회사 Cypher apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100447146B1 (en) * 1996-09-30 2004-11-06 엘지전자 주식회사 Cypher apparatus

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