KR930019012A - Image Compression Coding and Decoding for Bit Fixing - Google Patents

Image Compression Coding and Decoding for Bit Fixing Download PDF

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Publication number
KR930019012A
KR930019012A KR1019920002234A KR920002234A KR930019012A KR 930019012 A KR930019012 A KR 930019012A KR 1019920002234 A KR1019920002234 A KR 1019920002234A KR 920002234 A KR920002234 A KR 920002234A KR 930019012 A KR930019012 A KR 930019012A
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KR
South Korea
Prior art keywords
image compression
block
coefficients
coefficient
position information
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Application number
KR1019920002234A
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Korean (ko)
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KR960013232B1 (en
Inventor
김태응
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강진구
삼성전자 주식회사
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Priority to KR1019920002234A priority Critical patent/KR960013232B1/en
Publication of KR930019012A publication Critical patent/KR930019012A/en
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Publication of KR960013232B1 publication Critical patent/KR960013232B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]

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  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Image Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

비트 고정을 위한 영상 압축 부호화 및 복호화 방식은 디지탈 영상기기에 있어서 효율적으로 출력되는 비트량을 고정하기 위해서 일정한 부호화 단위에 대해서 DCT처리를 한 블럭의 DC 계수를 블럭 순서에 따라 부호화하고, 계수는 절대값이 큰 소정재의 픽셀로 배열하여 선택된 픽셀의 위치정보와 데이타값을 코딩하여 전송함으로써 데이타 압축 효율을 개선시킨다.The video compression encoding and decoding method for fixing bits encodes DC coefficients of blocks that have been subjected to DCT processing according to a block order in order to fix an amount of bits efficiently output in a digital video device, and the coefficients are absolute. The data compression efficiency is improved by arranging pixels of a predetermined value having large values and coding and transmitting position information and data values of the selected pixels.

Description

비트 고정을 위한 영상 압축 부호화 및 복호화 방식Image Compression Coding and Decoding for Bit Fixing

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

제1도는 본 발명에 의한 비트 고정을 위한 영상압축부호장치의 블럭도.1 is a block diagram of an image compression coding apparatus for fixing bits according to the present invention.

제2도는 본 발명에 의한 비트 고정을 위한 영상압축복호장치의 블럭도.2 is a block diagram of an image compression decoding device for fixing bits according to the present invention.

Claims (4)

디지탈 영상신호를 압축하기 위한 DCT부호화 방식에 있어서복수개의 블럭단위로 양자화된 DCT계수중 DC계수를 블럭순서에 따라 부호화한후, 각 블럭의 AC계수는 소정개의 절대값이 큰 픽셀로 배열하여 선택된 AC계수에 대하여 위치정보와 데이타값으로 부호화하는 비트 고정을 위한 영상압축 부호화 방식.In the DCT encoding method for compressing a digital video signal, the DC coefficients among the quantized DCT coefficients in a plurality of block units are encoded in block order, and the AC coefficients of each block are selected by arranging pixels having a predetermined absolute value. Image compression coding method for bit fixing by encoding position information and data value with respect to AC coefficient. 제1항에 있어서, 상기 위치정보는 8 ×8 블럭에 대하여 0 내지 63을 표현할 수 있는 6비트로 표현함을 특징으로 하는 비트 고정을 위한 영상압축 부호화방식.The image compression encoding method according to claim 1, wherein the position information is represented by 6 bits that can express 0 to 63 for an 8x8 block. 상기와 같은 부호화 방식에 의해서 부호화된 신호를 복원하기 위한 비트 고정을 위한 영상압축 복호화 방식.An image compression decoding method for fixing bits for reconstructing a signal encoded by the encoding method as described above. 제3하에 있어서, 보수개 블럭 단위에 대하여 부호화된 순서에 따라 각 블러의 DC계수를 복호하여 각 블럭의 첫번째 위치에 복원하며, AC계수도 선택된 소정개의 위치정보에 따라 복원하며, 위치정보가 없는 AC계수는 모두 0로 복원함을 특징으로 하는 영상압축 복호화 방식.Under the third method, the DC coefficient of each blur is decoded and restored to the first position of each block according to the coding order for the complementary block unit, and the AC coefficient is also restored according to the selected predetermined position information. Image compression decoding method characterized in that the AC coefficient is all restored to zero. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920002234A 1992-02-15 1992-02-15 Fixed rate video signal compressing encoding/decoding method KR960013232B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920002234A KR960013232B1 (en) 1992-02-15 1992-02-15 Fixed rate video signal compressing encoding/decoding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920002234A KR960013232B1 (en) 1992-02-15 1992-02-15 Fixed rate video signal compressing encoding/decoding method

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KR930019012A true KR930019012A (en) 1993-09-22
KR960013232B1 KR960013232B1 (en) 1996-10-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100439419B1 (en) * 1996-09-30 2004-08-31 주식회사 팬택앤큐리텔 Ac coefficient predictive coding method in object shape information coding, of which problem of lowered predictive coding gain is solved

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180058471A (en) * 2016-11-24 2018-06-01 농업회사법인 주식회사 자연향기 Manufacturing method of pudding containing plum and vinegar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100439419B1 (en) * 1996-09-30 2004-08-31 주식회사 팬택앤큐리텔 Ac coefficient predictive coding method in object shape information coding, of which problem of lowered predictive coding gain is solved

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