KR980007750A - Adaptive Image Coding System with Band Limit Function. - Google Patents
Adaptive Image Coding System with Band Limit Function. Download PDFInfo
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- KR980007750A KR980007750A KR1019960024043A KR19960024043A KR980007750A KR 980007750 A KR980007750 A KR 980007750A KR 1019960024043 A KR1019960024043 A KR 1019960024043A KR 19960024043 A KR19960024043 A KR 19960024043A KR 980007750 A KR980007750 A KR 980007750A
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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
- H04N19/63—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
- H04N19/635—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets characterised by filter definition or implementation details
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F5/00—Methods or arrangements for data conversion without changing the order or content of the data handled
- G06F5/06—Methods or arrangements for data conversion without changing the order or content of the data handled for changing the speed of data flow, i.e. speed regularising or timing, e.g. delay lines, FIFO buffers; over- or underrun control therefor
- G06F5/065—Partitioned buffers, e.g. allowing multiple independent queues, bidirectional FIFO's
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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
- H04N19/102—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
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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
- H04N19/142—Detection of scene cut or scene change
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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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- 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
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
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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
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/182—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
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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
- H04N19/43—Hardware specially adapted for motion estimation or compensation
- H04N19/433—Hardware specially adapted for motion estimation or compensation characterised by techniques for memory access
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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
- H04N19/439—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 using cascaded computational arrangements for performing a single operation, e.g. filtering
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2205/00—Indexing scheme relating to group G06F5/00; Methods or arrangements for data conversion without changing the order or content of the data handled
- G06F2205/06—Indexing scheme relating to groups G06F5/06 - G06F5/16
Abstract
본 발명은, 부호화하고자 하는 해당 프레임의 픽셀값 평균과 각 프레임의 평균값에 근거한 이전 소정시간 동안의 다수의 프레임의 단시간 통계에 의거하여 입력 영상의 장면전환을 검출하고, 그 검출결과에 따른 영상의 장면전환시에 필터링을 통한 대역 제한 기법을 이용하여 입력 영상 신호의 고주파 성분을 적응적으로 제거함으로써, 부호화후의 비트 발생량을 효율적으로 조절할 수 있도록 한 대역 제한 기능을 갖는 적응적인 영상 부호화 시스템에 관한 것으로, 이를 위하여 본 발명은, 부호화를 위해 순차 입력되는 프레임 각각에 대해 그 통계적 특성을 나타내는 평균(MIp)과 표준편차(ACT)를 각각 추출하고 ; 소정시간 동안의 복수의 프레임에 대한 평균과 표준편차 각각에 대해 총평균(MMIp, MACT)과 총표준편차(SMIp, SACT)를 각각 산출하여 기설정된 소정시간 동안의 단시간 통계를 산출하고; 현재 입력 프레임의 통계적 특성과 산출된 단시간 특성간의 비교결과에 의거하여 현재 입력 프레임에 대해 필터링 기법을 이용하여 그 통과 대역을 제한하고; 현재 입력 프레임 자체 또는 필터링 기법을 통해 고주파 성분이 제거된 대역 제한 프레임을 DCT, 양자화, VCL기법 등을 갖는 부호화 수단에 선택적으로 제공하는 기술적 수단을 포함함으로써, 입력영상에서 큰 복잡도를 갖는 장면전환 상황이 발생하더라도 부호화 수단에서의 양자화시 과도한 스텝 사이즈가 증가없이 부호화후 발생되는 비트량을 효과적으로 조절할 수 있는 것이다.The present invention detects a scene change of an input image based on short-term statistics of a plurality of frames during a previous predetermined time based on an average of pixel values of a corresponding frame to be encoded and an average value of each frame, And an adaptive image coding system having a band limiting function for efficiently adjusting a bit generation amount after coding by adaptively removing a high frequency component of an input image signal using a band limiting technique through filtering at the time of scene change To this end, the present invention extracts an average (MIp) and a standard deviation (ACT) representing the statistical characteristic of each sequentially input frame for encoding, respectively; (MMIp, MACT) and total standard deviation (SMIp, SACT) for each of the average and standard deviation of the plurality of frames over a predetermined period of time to calculate short-term statistics for a preset predetermined time; Limiting a passband of a current input frame using a filtering technique based on a comparison result between a statistical characteristic of the current input frame and the calculated short-time characteristic; And a technical means for selectively providing a band limiting frame in which a high frequency component has been removed through a current input frame itself or a filtering technique to an encoding means having DCT, quantization, VCL technique, etc., It is possible to effectively control the amount of bits generated after encoding without increasing the excessive step size at the time of quantization in the encoding means.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.
제1도는 본 발명의 바람직한 실시예에 따른 대역 제한 기능을 갖는 적응적인 영상 부호화 시스템의 블록 구성도.FIG. 1 is a block diagram of an adaptive image encoding system having a band limiting function according to a preferred embodiment of the present invention; FIG.
제2도는 제1도의 전처리 블록에 대한 세부적인 블록 구성도.Figure 2 is a detailed block diagram of the preprocessing block of Figure 1;
Claims (24)
Priority Applications (1)
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KR1019960024043A KR100220586B1 (en) | 1996-06-26 | 1996-06-26 | Adaptive image coding system having functions for controlling bandpath of video signals |
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KR1019960024043A KR100220586B1 (en) | 1996-06-26 | 1996-06-26 | Adaptive image coding system having functions for controlling bandpath of video signals |
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KR980007750A true KR980007750A (en) | 1998-03-30 |
KR100220586B1 KR100220586B1 (en) | 1999-09-15 |
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KR1019960024043A KR100220586B1 (en) | 1996-06-26 | 1996-06-26 | Adaptive image coding system having functions for controlling bandpath of video signals |
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1996
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KR100220586B1 (en) | 1999-09-15 |
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