KR970050840A - QNO Determination Unit - Google Patents
QNO Determination Unit Download PDFInfo
- Publication number
- KR970050840A KR970050840A KR1019950067073A KR19950067073A KR970050840A KR 970050840 A KR970050840 A KR 970050840A KR 1019950067073 A KR1019950067073 A KR 1019950067073A KR 19950067073 A KR19950067073 A KR 19950067073A KR 970050840 A KR970050840 A KR 970050840A
- Authority
- KR
- South Korea
- Prior art keywords
- bits
- code
- threshold
- codes
- qno
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
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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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
본 발명은 다수개의 메크로 블록으로 형성되는 하나의 세크먼트에 대한 DCT 계수를 소정의 임계 비트 수에 대응하도록 부호화하기 위한 QNO를 결정하는 장치에 관한 것으로서, 입력되는 클래스 값에 대응하여 서로 다른 QNO(Quantization Number)의 양자화 스텝으로 상기 DCT 계수를 양자화하는 다수개의 양자화기와; 상기 양자화기의 양자화 값을 각각 부호화하여 출력하는 상기 양자화기와 동일 개수의 부호화기와; 상기 세크먼트를 형성하는 상기 부호화기들의 부호들중 상기 임계 비트 수보다 가장 근사하게 크고, 작은 비트 수를 갖는 두 개의 부호화부의 부호를 선택하는 세그먼트 비교기와; 상기 임계 비트 수보다 큰 비트 수를 갖는 부호들 중 상기 메크로 블록을 이루는 부호를 상기 임계 비트 수보다 작은 비트 수를 갖는 부호의 대응하는 메크로 블록의 부호로 순차적으로 대치하여 대치된 때의 부호의 비트수를 계산하는 연산부와; 상기 연산된 부호들중 상기 임계 비트 수와 가장 근사한 비트 수를 형성하는 부호에 대응하는 메크로 블록당의 QNO을 출력하는 메크로 블록 비교기를 구비한다.The present invention relates to an apparatus for determining a QNO for encoding a DCT coefficient for one segment formed of a plurality of macro blocks to correspond to a predetermined threshold number of bits. A plurality of quantizers for quantizing the DCT coefficients in a quantization step of Quantization Number; An equal number of encoders for encoding and outputting quantization values of the quantizers, respectively; A segment comparator for selecting the codes of two encoders having a bit number that is closest to the threshold number of bits among the codes of the encoders forming the segment; Bits of the code when the code constituting the macroblock among the codes having the number of bits greater than the threshold bit number is replaced by sequentially replacing the code of the corresponding macroblock of the code having the number of bits smaller than the threshold bit number. A calculating unit for calculating a number; And a macro block comparator for outputting a QNO per macro block corresponding to a code forming a bit number closest to the threshold number of bits among the calculated codes.
즉, 본 발명은 하나의 세크먼트에 할당된 임계 비트 수에 대응하는데 적절한 메크로 블록당의 QNO값을 설정할 수 있다는 효과가 있다.That is, the present invention has the effect that it is possible to set a QNO value per macro block appropriate to correspond to the number of threshold bits allocated to one segment.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
제1도는 본 발명에 따른 QNO 결정 장치의 블록도.1 is a block diagram of a QNO determination apparatus according to the present invention.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950067073A KR100202393B1 (en) | 1995-12-29 | 1995-12-29 | Qno determining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950067073A KR100202393B1 (en) | 1995-12-29 | 1995-12-29 | Qno determining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970050840A true KR970050840A (en) | 1997-07-29 |
| KR100202393B1 KR100202393B1 (en) | 1999-06-15 |
Family
ID=19447530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950067073A KR100202393B1 (en) | 1995-12-29 | 1995-12-29 | Qno determining device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100202393B1 (en) |
-
1995
- 1995-12-29 KR KR1019950067073A patent/KR100202393B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR100202393B1 (en) | 1999-06-15 |
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