KR0173922B1 - 프레임 그룹별 비트율 제어 방법 - Google Patents
프레임 그룹별 비트율 제어 방법 Download PDFInfo
- Publication number
- KR0173922B1 KR0173922B1 KR1019950031982A KR19950031982A KR0173922B1 KR 0173922 B1 KR0173922 B1 KR 0173922B1 KR 1019950031982 A KR1019950031982 A KR 1019950031982A KR 19950031982 A KR19950031982 A KR 19950031982A KR 0173922 B1 KR0173922 B1 KR 0173922B1
- Authority
- KR
- South Korea
- Prior art keywords
- frame
- bit amount
- scene change
- gop
- bit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000013139 quantization Methods 0.000 claims abstract description 10
- 230000003139 buffering effect Effects 0.000 claims abstract description 3
- 238000007689 inspection Methods 0.000 claims abstract description 3
- 230000006866 deterioration Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007704 transition Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
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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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/114—Adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames
-
- 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
- H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Claims (3)
- 비디오 부호화 장치에 적용되는 비트율 제어 방법에 있어서, GOP(Group Of Pictures) 구조를 설정하는 제1단계(5); GOP내에서 장면 전환이 발생하였는가를 검사하는 제2단계(6); 상기 제2단계(6)의 검사 결과, 장면 전환이 발생하였으면 장면 전환 프레임에 대해서는 예측한 비트량을 사용하여 비트량을 할당하고, 그외의 프레임에 대해서는 GOP에 할당된 비트량에서 장면 전환 프레임들에 할당할 비트량을 제외한 나머지 비트량을 가지고 비트량을 할당하며, 장면 전환이 발생하지 않았으면 GOP에 할당된 비트량을 가지고 프레임별 비트량을 할당하는 제3단계(7,8,9); 버퍼링 수단(3)의 충만도를 고려하여 부호화 블럭별로 양자화 파라메타 값을 계산하여 부호화 수단(2)으로 전달하는 과정을 프레임내의 마지막 부호화 블럭까지 반복 수행하는 제4단계(10,11); 상기 제3단계(7,8,9)의 비트량 할당 과정과 제4단계(10,11)를 GOP내의 마지막 프레임까지 반복 수행하는 제5단계; 및 상기 제2단계(6) 내지 제5단계를 마지막 GOP까지 반복 수행하는 제6단계를 포함하는 것을 특징으로 하는 비트율 제어 방법.
- 제1항에 있어서, 상기 제3단계(7,8,9)에서 장면 전환이 발생하여 프레임별 비트량을 할당하는 과정은, 장면 전환 프레임에 대하여 화질 열화가 없도록 하는데 필요한 비트량을 예측한 후에 GOP에 할당된 비트량에서 장면 전환 프레임들에 할당할 비트량을 제외한 나머지 비트량을 계산하여 프레임별로 할당하는 것을 특징으로 하는 비트율 제어 방법.
- 제2항에 있어서, 상기 장면 전환 프레임에 대한 비트량 예측은, I-프레임의 복잡도를 프레임내의 화상 데이타들의 평균 편차를 이용하여 예측하고, P-프레임 및 B-프레임의 복잡도를 각각의 초기값을 이용하여 예측하는 것을 특징으로 하는 비트율 제어 방법.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950031982A KR0173922B1 (ko) | 1995-09-26 | 1995-09-26 | 프레임 그룹별 비트율 제어 방법 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950031982A KR0173922B1 (ko) | 1995-09-26 | 1995-09-26 | 프레임 그룹별 비트율 제어 방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970019644A KR970019644A (ko) | 1997-04-30 |
KR0173922B1 true KR0173922B1 (ko) | 1999-03-20 |
Family
ID=19427926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950031982A Expired - Fee Related KR0173922B1 (ko) | 1995-09-26 | 1995-09-26 | 프레임 그룹별 비트율 제어 방법 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0173922B1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100923961B1 (ko) * | 2007-07-09 | 2009-10-29 | 세종대학교산학협력단 | 저지연 영상 통신 시스템 및 방법 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100390115B1 (ko) * | 1999-04-12 | 2003-07-04 | 마츠시타 덴끼 산교 가부시키가이샤 | 화상 처리 방법, 화상 처리 장치 및 데이터 기억 매체 |
-
1995
- 1995-09-26 KR KR1019950031982A patent/KR0173922B1/ko not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100923961B1 (ko) * | 2007-07-09 | 2009-10-29 | 세종대학교산학협력단 | 저지연 영상 통신 시스템 및 방법 |
Also Published As
Publication number | Publication date |
---|---|
KR970019644A (ko) | 1997-04-30 |
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