KR950010636A - Image Compression Coder and Coder Decoding - Google Patents

Image Compression Coder and Coder Decoding Download PDF

Info

Publication number
KR950010636A
KR950010636A KR1019930018943A KR930018943A KR950010636A KR 950010636 A KR950010636 A KR 950010636A KR 1019930018943 A KR1019930018943 A KR 1019930018943A KR 930018943 A KR930018943 A KR 930018943A KR 950010636 A KR950010636 A KR 950010636A
Authority
KR
South Korea
Prior art keywords
data
block
value
image
coding
Prior art date
Application number
KR1019930018943A
Other languages
Korean (ko)
Other versions
KR960012934B1 (en
Inventor
박동식
Original Assignee
김광호
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019930018943A priority Critical patent/KR960012934B1/en
Publication of KR950010636A publication Critical patent/KR950010636A/en
Application granted granted Critical
Publication of KR960012934B1 publication Critical patent/KR960012934B1/en

Links

Landscapes

  • Color Television Systems (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

화상의 블럭을 블럭내의 상태에 따라 적용적인 블럭절단과 블럭내의 최적화된 역치값으로 블럭절단 코딩을 수행하여 화상데이타를 부복호화하는 화상처리장치의 화상압축 부복호화기 및 방법이 개시되고 있다. 본 발명에 따르면 부호화될 화상의 절단 블럭을 화상의 상태에 따라 가변하여 절단 및 부호화하여 화질의 열화를 막을 수 있다. 또한 절단된 블럭내의 최적 역치값을 구하여 화상데이타를 코딩하므로 블럭의 엣지부분을 강조할 수 있으며, 화상의 상태에 따라 블럭 사이즈를 적응적으로 가변하여 화상위 압축율을 높일 수 있다.Disclosed are an image compression and decoding apparatus and method of an image processing apparatus for encoding and decoding an image data by performing block cutting coding on a block of an image in accordance with a state in a block and an optimized threshold value in the block. According to the present invention, the cutting block of the image to be encoded can be varied and cut and encoded according to the state of the image to prevent deterioration of image quality. In addition, since the image data is coded by obtaining the optimal threshold value in the truncated block, the edge portion of the block can be emphasized, and the block size can be adaptively changed according to the state of the image to increase the compression ratio on the image.

Description

화상압축 부복호화기 및 부복호화방법Image Compression Coder and Coder Decoding

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

제2도는 본 발명에 따른 화상압축 부호기를 화상압축장치의 구성을 나타내는 블럭 구성도.2 is a block diagram showing the configuration of an image compression device according to the present invention.

제3도는 제2도의 구성중 RGB-YIQ 변환기(30)의 구체 회로도.3 is a concrete circuit diagram of the RGB-YIQ converter 30 in the configuration of FIG.

제4도는 제2도의 구성중 평균분산제어부(50)의 상세회로도.4 is a detailed circuit diagram of the average dispersion control unit 50 in the configuration of FIG.

제5도는 제2도의 구성중 MBTC부(60)의 상세회로도.5 is a detailed circuit diagram of the MBTC unit 60 in the configuration of FIG.

제6도는 본 발명에 따른 화상압축 복호기의 구성블럭도.6 is a block diagram of an image compression decoder according to the present invention;

Claims (3)

화상처리장치에 있어서, 스캐닝된 화상데이타를 입력받아 소정 블럭단위로 데이타를 저장하는 메모리와, 상기 메모리에 저장된 화상데이타를 억세스하여 휘도 및 색차데이타로 변환하여 출력하는 RGB-YIQ변환기와, 상기 RGB-YIQ 변환기로부터 색차신호를 입력받아 수평방향으로 서브샘플링하는 서브샘플러와, 상기 블럭내의 상기 휘도데이타와 서브샘플링된 색차데이타들의 평균값, 표준편차, 분산값을 계산하는 평균분산계산부와, 상기 평균분산계산부로부터 계산된 평균값, 표준편차, 분산값으로 주어진 블럭내의 MSE를 최소로 하는 최적화된 역치값을 구하여 블럭절단코딩을 수행하는 MBTC부와 상기 MBTC부로부터 코딩된 데이타를 입력받아 각각의 코딩상태에 대응하는 플래그 데이타를 출력하여 상기 코딩된 데이타와 함께 저장하는 부호데이타메모리와, 상기 부호데이타메모리로부터 출력된 부호데이타를 전송받아 부호데이타의 플래그특성(flag identifier)를 검색하고 상기 검색상태에 대응하여 부호데이타를 로드하여 출력하는 데이타판단부와, 상기 데이타판단부로부터 입력되는 부호데이타를 입력받아 디코딩하는 역 MBTC부와, 상기 역 MBTC로부터 출력되는 디코딩된 데이타중 I,Q데이타를 보간하는 보간기로 구성함을 특징으로 하는 화상압축 부복호기.An image processing apparatus comprising: a memory for receiving scanned image data and storing data in predetermined block units; an RGB-YIQ converter for accessing image data stored in the memory and converting the image data into luminance and color difference data; A subsampler receiving a color difference signal from a YIQ converter and subsampling in a horizontal direction, an average dispersion calculator for calculating an average value, a standard deviation, and a dispersion value of the luminance data and the subsampled color difference data in the block, and the average MBC section which performs block cutting coding by obtaining the optimized threshold value that minimizes the MSE in a given block with the mean value, the standard deviation, and the variance calculated from the variance calculator, and receives the coded data from the MBTC section. Code data memory for outputting flag data corresponding to the state and storing them together with the coded data A data determination unit which receives the code data outputted from the code data memory, retrieves a flag identifier of the code data, loads and outputs the code data corresponding to the search state, and is input from the data determination unit. And an inverse MBTC unit for receiving and decoding code data and an interpolator for interpolating I and Q data among decoded data output from the inverse MBTC. 제1항에 있어서, 상기 MBTC부가 소정 기준값과 블럭내의 휘도데이타를 입력받아 비교하며, 기준값보다 작은 밝기값을 출력하는 제1비교기와, 상기 비교기로부터의 출력을 가산하고 데이타를 피드백하여 누산하여 힘을 출력하는 가산기와, 상기 가산기의 출력을 상기 비교기로부터 입력되는 출력값갯수로 분주하여 평균을 구하는 분주기와, 상기 평균을 입력받아 MSE값을 출력하는 MSE수행로직과, 상기 MSE값을 일시 저장하는 임시 메모리와, 상기 메모리에 저장된 MSE값을 각각 비교하여 가장 작은 MSE값을 출력하는 최적 역치값으로 출력하는 상기 소정기준은 제2비교기로 구성되며, 상기 역 MBTC부가 입력데이타에 대응하여 각각의 복원값에 대응시키기 위한 비교기와, 부호데이타의 복원값들을 입력받아 저장하고 상기 비교기의 데이타 입력에 대응하여 각각의 복원값을 출력하는 제1메모리 및 제2메모리와, 상기 비교기의 동작을 제어하기 위한 카운터로 구성됨을 특징으로 하는 화상압축 부복호화기.2. The apparatus of claim 1, wherein the MBTC unit receives a comparison of a predetermined reference value with luminance data in the block, and compares the first comparison unit with a first comparator for outputting a brightness value smaller than the reference value; A divider for dividing the output of the adder by the number of output values inputted from the comparator to obtain an average, an MSE execution logic for receiving the average and outputting an MSE value, and temporarily storing the MSE value. The predetermined criterion for comparing the temporary memory and the MSE values stored in the memory to an optimum threshold value for outputting the smallest MSE value is configured as a second comparator, and the inverse MBTC unit reconstructs each of the corresponding data. A comparator to correspond to the value and the restored values of the code data are received and stored, and each corresponding to the data input of the comparator A first memory and a second memory, an image compression unit, characterized by a decoder consisting of a counter for controlling the operation of said comparator and outputting the restored value. 화상처리장치의 화상압축 부복호화방법에 있어서, 화상 스캐닝데이타를 소정 윈도우를 씌워 블럭단위로 메모리에 저장하는 블럭절단단계와, RGB-YIQ변환기가 상기 메모리에 저장된 데이타를 억세스하여 휘도 및 색차 데이타로 변환하는 데이타변환단계와, 서브샘플러가 RGB-YIQ변환기로부터 색차데이타를 입력받아 소정 비율로 서브샘플링하는 서브샘플링단계와, 평균분산계산부는 휘도데이타 및 서브샘플링된 색차데이타를 입력받아 블럭내의 평균값, 표준편차, 분산값등의 통계데이타를 계산하여 출력하는 계산단계와, 상기 통계데이타와 소정기준치를 비교하여 블럭내의 엣지부분이 있는가를 검색하는 엣지검색단계와, 상기 검색결과에 따라 엣지블럭이면 현재의 처리블럭을 다시 소정비로 절단하여 통계데이타를 계산한 후 절단된 블럭이 엣지블럭인가를 검색하고, 절단된 블럭이 엣지블럭이면 코딩없이 화상데이타를 출력하며, 엣지블럭이 아니면 MSE 처리루틴으로 최적역치값을 구하여 블럭절단코딩하여 코딩데이타 및 복원값을 계산하여 출력하는 엣지블럭절단코딩단계와, 상기 엣지검색단계에서 엣지블럭이 아님이 검색되면 MSE처리루틴으로 최적역치값을 구하여 블럭절단코딩하여 코딩데이타 및 복원값을 계산하여 출력하는 블럭절단코딩단계와, 상기 엣지블럭절단코딩단계 및 블럭절단코딩단계에서 코딩된 데이타에 대응하는 플래그 데이타를 출력하는 플래그데이타 출력단계와, 부호 데이타메모리가 상기 화상데이타, 코딩데이타. 복원값, 플래그데이타를 입력받아 처리블럭의 부호데이타로 저장하는 보호데이타저장단계와, 상기 부호데이타메모리에 저장된 부호데이타를 전송받아 부호데이타내의 플래그 데이타를 검색하는 데이타 검색단계와, 상기 검색단계의 검색결과에 대응하여 부호 데이타를 억세스하여 상기 부호데이타중 복원값에 따라 코딩데이타를 디코딩하여 출력하는 역 MBTC단계로 구성함을 특징으로 하는 화상압축 부복호화방법.An image compression and decoding method of an image processing apparatus, comprising: a block cutting step of storing image scanning data in a block unit by covering a predetermined window, and an RGB-YIQ converter accessing the data stored in the memory as luminance and color difference data; A data conversion step of converting, a subsampling step of receiving a color difference data from a RGB-YIQ converter by subsampling at a predetermined ratio, and an average variance calculating unit receiving luminance data and subsampled color difference data, and a mean value in a block. A calculation step of calculating and outputting statistical data such as standard deviation and variance value, an edge search step of searching whether there is an edge portion in the block by comparing the statistical data with a predetermined reference value, and an edge block according to the search result. After cutting the process block again at the predetermined ratio, the statistical data is calculated and the cut block is edge If the cut block is an edge block, the image data is output without coding. If the block is not an edge block, edge block cutting is performed by calculating the coding data and the reconstruction value by obtaining the optimal threshold value using an MSE processing routine and then coding the block. A block cutting coding step of calculating a coding data and a reconstruction value by calculating block coding by calculating an optimal threshold value using an MSE processing routine when it is detected that a non-edge block is detected in the edge searching step, and the edge block cutting coding. A flag data output step of outputting flag data corresponding to the data coded in the step and block cutting coding step; and a code data memory for the image data and the coding data. A protection data storage step of receiving the restored value and the flag data and storing it as code data of the processing block; a data retrieval step of receiving the code data stored in the code data memory and retrieving the flag data in the code data; And an inverse MBTC step of accessing code data corresponding to a search result and decoding and outputting coding data according to a reconstruction value of the code data. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930018943A 1993-09-18 1993-09-18 Method and apparatus for image compressing coding /decoding KR960012934B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930018943A KR960012934B1 (en) 1993-09-18 1993-09-18 Method and apparatus for image compressing coding /decoding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930018943A KR960012934B1 (en) 1993-09-18 1993-09-18 Method and apparatus for image compressing coding /decoding

Publications (2)

Publication Number Publication Date
KR950010636A true KR950010636A (en) 1995-04-28
KR960012934B1 KR960012934B1 (en) 1996-09-25

Family

ID=19363950

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930018943A KR960012934B1 (en) 1993-09-18 1993-09-18 Method and apparatus for image compressing coding /decoding

Country Status (1)

Country Link
KR (1) KR960012934B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013006981A1 (en) 2012-05-10 2013-11-14 Mando Corp. Suspension spring for a vibration damper using a carbon fiber reinforced plastic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013006981A1 (en) 2012-05-10 2013-11-14 Mando Corp. Suspension spring for a vibration damper using a carbon fiber reinforced plastic

Also Published As

Publication number Publication date
KR960012934B1 (en) 1996-09-25

Similar Documents

Publication Publication Date Title
EP3425914B1 (en) Method and apparatus for encoding or decoding a palette in palette coding mode
US4238768A (en) Picture signal coding apparatus
US5926225A (en) Image coder which includes both a short-term frame memory and long-term frame memory in the local decoding loop
US20100177820A1 (en) Video encoding device, video decoding device, video encoding method, video decoding method, video encoding or decoding program
US8116581B2 (en) Efficient image representation by edges and low-resolution signal
US6301301B1 (en) Apparatus and method for coding and decoding a moving image
JP5990790B2 (en) Decoding method, computer readable medium storing instructions for decoding, decoding system and decoder
US20070248160A1 (en) System and method of providing directional information for direct prediction
US8811760B2 (en) Coding images using intra prediction modes
JPH06121175A (en) Picture processor
US20180014034A1 (en) Methods and Apparatus of Decoding Process for Palette Syntax
US6005622A (en) Video coder providing implicit or explicit prediction for image coding and intra coding of video
US10992964B2 (en) Method and apparatus for determining coding tree node split mode and coding device
US20170295367A1 (en) Video coder providing implicit coefficient prediction and scan adaptation for image coding and intra coding of video
US6021227A (en) Image compression system including encoder having run mode
KR950010636A (en) Image Compression Coder and Coder Decoding
US11425379B2 (en) Method and apparatus of latency reduction for chroma residue scaling
US6064696A (en) Encoding apparatus
CN113994680A (en) Independent CABAC for sub-portions of pictures
JP2008042681A (en) Image processing method and processor, computer program and computer readable storage medium
US11785204B1 (en) Frequency domain mode decision for joint chroma coding
WO2023241340A1 (en) Hardware for decoder-side intra mode derivation and prediction
US6539061B1 (en) Efficient method for decompressing difference coded signals
EP4014493A1 (en) Image data encoding and decoding
JPH046953A (en) Picture coding system

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20070830

Year of fee payment: 12

LAPS Lapse due to unpaid annual fee