KR960003402A - Bitstream compressor with higher compression ratio by selective use of file compression method - Google Patents

Bitstream compressor with higher compression ratio by selective use of file compression method Download PDF

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KR960003402A
KR960003402A KR1019940013291A KR19940013291A KR960003402A KR 960003402 A KR960003402 A KR 960003402A KR 1019940013291 A KR1019940013291 A KR 1019940013291A KR 19940013291 A KR19940013291 A KR 19940013291A KR 960003402 A KR960003402 A KR 960003402A
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South Korea
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compression
unit
bitstream
file
data
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KR1019940013291A
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Korean (ko)
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KR970010093B1 (en
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박용규
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배순훈
대우전자 주식회사
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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
    • H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124—Quantisation
    • 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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
    • 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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/93—Run-length coding

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

Abstract

본 발명에 따른 고압축 비트스트림 압축장치 ; 화일 압축기법을 선택적으로 사용함으로써 보다 높은 압축율 및 전송율을 갖는다. 양자화 스텝사이즈 파라미터(QP)을 입력받으며, 이산 코사인 변환된 수를 양자회하여 출력하는 양자화부(HO)와, 상기 양자화된 데이타를 줄길이부호화 및 가변길이부호화하여 출력하는 부호화부(120,130)를 갖는 본 발명의 비트스트림 압축장치는, 상기 부호화된 비트스트림 데이타를 화일 압축하여 출력하는 제압축부(l4O)와, 상기 재압축부(l4O)노 부터 압죽율을 검출하고, 상기 압축율에 대응적으로 조절된 양자화 스텝사이즈 파라미터(QP)를 상기 양자화부(11O)로 출력하는 조절부(160) 를 포함한다.High compression bitstream compression apparatus according to the present invention; By selectively using the file compressor method, it has a higher compression ratio and a transmission rate. A quantization unit (HO) which receives a quantization step size parameter (QP) and quantizes a discrete cosine transformed number and outputs the quantized step, and an encoder (120,130) which outputs the quantized data by line length encoding and variable length encoding. The bitstream compression apparatus of the present invention has a compression section (l4O) for file-compressing and outputting the encoded bitstream data, and detects a rolling ratio from the recompression section (l4O), and corresponds to the compression ratio. And an adjusting unit 160 for outputting the adjusted quantization step size parameter QP to the quantization unit 110.

Description

화일 압축기법의 선택적 사용으로 보다 높은 압축율을 갖는 비트스트림 압축장치Bitstream compressor with higher compression ratio by selective use of file compression method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 고압축 비트스트림 압축장치를 도시한 블럭도.1 is a block diagram showing a high compression bitstream compression apparatus according to the present invention.

Claims (3)

양자화 스텝사이즈 파라미터(QP)를 입력받으며, 이산 코사인 변환된 변환계수를 양자화하여 출력하는 양자화부(110)와, 상기 양자화된 데이타를 줄길이부호화 및 가변길이부호화하여 출력하는 부호화부(120,130)를 갖는 상기 부호화된 비트스트림 데이타를 화일 압축하여 출력하는 재압축부(140)와; 상기 재압축부(140)로 부터 압축율을 검출하고, 상기 압축율에 대응적으로 조절된 양자화 스텝사이즈 파라미터(QP)를 상기 양자화부(110)로 출력하는 조절부(160)를 포함하는 것을 특징으로 하는 비트스트림 압축장치.A quantization unit 110 that receives a quantization step size parameter (QP), quantizes a discrete cosine transformed transform coefficient, and outputs the quantized data by line length encoding and variable length encoding of the quantized data. A recompressing unit (140) for compressing and outputting the encoded bitstream data having the same; And a control unit 160 for detecting a compression rate from the recompression unit 140 and outputting the quantization step size parameter QP corresponding to the compression rate to the quantization unit 110. Bitstream Compressor. 제1항에 있어서, 상기 재압축부(140)가 상기 부호화된 비트스트림 데이타를 서로 다른 화일 압축기법에 의해 화일 압축하는 다수개의 화일 압축부를 포함하는 것을 특징으로 하는 비트스트림 압축장치.2. The bitstream compression apparatus as claimed in claim 1, wherein the recompression unit (140) comprises a plurality of file compression units for compressing the encoded bitstream data by different file compression methods. 제2항에 있어서, 상기 재압축부(140)의 다수개의 화일 압축부로 부터 데이타를 입력받으며, 선택적으로 데이타를 출력하는 선택부(150)를 더 포함하며, 상기 조절부(160)가 상기 재압축부(140)의 다수개의 화일 압축부로 부터 각각 압축율을 검출하고, 상기 각각의 압축율은 비교판단하여 가장 높은 압축율을 갖는 화일 압축부를 선택하기 위한 선택신호(SO)를 상기 선택부(150) 및 수신단으로 전송하고, 상기 가장 높은 압축율에 대응적으로 조절된 양자화 스텝사이즈 피라미터(QP)를 상기 양자화부(110)로 출력하는 것을 특징으로 하는 비트스트림 압축장치.The apparatus of claim 2, further comprising a selection unit 150 receiving data from a plurality of file compression units of the recompression unit 140, and selectively outputting data. The compression unit detects a compression ratio from the plurality of file compression units of the compression unit 140, and the compression unit compares each of the selection units 150 and a selection signal SO for selecting a file compression unit having the highest compression ratio. And a quantization step size parameter (QP) which is transmitted to the receiving end and adjusted to correspond to the highest compression rate, to the quantization unit (110). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR94013291A 1994-06-14 1994-06-14 Bit stream coding apparatus having high coding rate by selective use of file coding method KR970010093B1 (en)

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Application Number Priority Date Filing Date Title
KR94013291A KR970010093B1 (en) 1994-06-14 1994-06-14 Bit stream coding apparatus having high coding rate by selective use of file coding method

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Application Number Priority Date Filing Date Title
KR94013291A KR970010093B1 (en) 1994-06-14 1994-06-14 Bit stream coding apparatus having high coding rate by selective use of file coding method

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KR960003402A true KR960003402A (en) 1996-01-26
KR970010093B1 KR970010093B1 (en) 1997-06-21

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