JP2005333609A - 符号化制御回路及び符号化回路 - Google Patents
符号化制御回路及び符号化回路 Download PDFInfo
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- JP2005333609A JP2005333609A JP2004322296A JP2004322296A JP2005333609A JP 2005333609 A JP2005333609 A JP 2005333609A JP 2004322296 A JP2004322296 A JP 2004322296A JP 2004322296 A JP2004322296 A JP 2004322296A JP 2005333609 A JP2005333609 A JP 2005333609A
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- video signal
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
- A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
- A47C1/027—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of clamps or friction locking members
-
- 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
- H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
-
- 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
- H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
-
- 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
-
- 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
-
- 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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/59—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
【構成】情報量を低減させていない第1映像信号と情報量を低減させた第2映像信号のいずれかを発生符号量の積算値に応じて選択して出力するように構成された符号化回路により上記課題を解決できる。
【選択図】図1
Description
減算器=S(k)−FS(k)
(YQ /2XQ )×n+(YQ /2)<Rn ・・・(1)
となり、YQ は(2)式で求められる。
ただし、XQ =0,1,2,…,n
すなわち、R0からRnの基準値を(2)式で示される値YQ により求めることにより、累積符号量はRnを超えないことになる。また、この条件は点Qにおいてその後の発生符号化量が同じ傾きで増加するとの仮定であるが、倍の傾きで増加するとの仮定でも同様の条件式が得られる。この場合の条件式は、(YQ /XQ )×n+(YQ /2)<Rnとなる。
Claims (6)
- 映像符号化回路の発生符号量を制御するための符号化制御回路であって、周波数特性を低下させていない第1映像信号と周波数特性を低下させた第2映像信号のいずれかを前記映像符号化回路における発生符号量の積算値に応じて選択して出力するように構成されたことを特徴とする符号化制御回路。
- 映像符号化回路の発生符号量を制御するための符号化制御回路であって、
前記映像符号化回路における符号化単位期間内の一定時間間隔の実際の発生符号量の積算値と前記時間間隔に対応して予め設定された基準発生符号量との大小比較を行う比較判定回路と、
周波数特性を低下させていない第1映像信号と周波数特性を低下させた第2映像信号のいずれかを選択して前記映像符号化回路に入力するスイッチと、
前記実際の発生符号量の積算値が前記基準発生符号量を超えていない状態では前記スイッチに第1映像信号を選択させ、越えたときには前記スイッチに第2映像信号を選択させるスイッチ制御手段と、
を備えたことを特徴とする符号化制御回路。 - 請求項1又は2に記載の符号化制御回路において、前記第2映像信号は、ローパスフィルタにて周波数帯域が狭められ、そのサンプリング周波数も低減させられた映像信号であることを特徴とする符号化制御回路。
- 映像信号を符号化して出力する符号化回路であって、
第1映像信号の情報量を低減させて第2映像信号として出力する情報量低減部と、
選択信号に基づいて、前記第1映像信号と前記第2映像信号とのいずれか一方を選択して出力する選択部と、
前記選択回路から出力された映像信号を符号化して出力する符号化器と、
所定の符号化単位期間において前記符号化器から出力される符号化された映像信号の符号量を積算し所定の時間間隔で実際値として出力する発生符号量累積算出部と、
前記実際値と前記時間間隔毎に定められた基準値とを比較して前記選択信号を出力する比較器と、
を備えることを特徴とする符号化回路。 - 請求項4に記載の符号化回路において、
前記情報量低減部は、前記第1映像信号の周波数帯域を制限して前記第2映像信号として出力することを特徴とする符号化回路。 - 請求項4又は5に記載の符号化回路において、
前記情報量低減部は、前記第1映像信号のサンプリング周波数を低減して前記第2映像信号として出力することを特徴とする符号化回路。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004322296A JP2005333609A (ja) | 2004-04-22 | 2004-11-05 | 符号化制御回路及び符号化回路 |
TW94112621A TWI251984B (en) | 2004-04-22 | 2005-04-20 | Encode control circuit and encode circuit |
KR20050033094A KR100711672B1 (ko) | 2004-04-22 | 2005-04-21 | 부호화 제어 회로 및 부호화 회로 |
US11/112,712 US7680344B2 (en) | 2004-04-22 | 2005-04-22 | Encoding control circuit and encoding circuit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004127146 | 2004-04-22 | ||
JP2004322296A JP2005333609A (ja) | 2004-04-22 | 2004-11-05 | 符号化制御回路及び符号化回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2005333609A true JP2005333609A (ja) | 2005-12-02 |
Family
ID=35239503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004322296A Pending JP2005333609A (ja) | 2004-04-22 | 2004-11-05 | 符号化制御回路及び符号化回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7680344B2 (ja) |
JP (1) | JP2005333609A (ja) |
KR (1) | KR100711672B1 (ja) |
TW (1) | TWI251984B (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529950A (ja) * | 1991-07-19 | 1993-02-05 | Toshiba Corp | 符号量制御装置 |
JPH11234668A (ja) * | 1998-02-13 | 1999-08-27 | Sony Corp | 映像符号化装置 |
JP2002223439A (ja) * | 2001-01-25 | 2002-08-09 | Canon Inc | 画像圧縮符号化装置及び方法並びにプログラム |
JP2003348590A (ja) * | 2002-05-23 | 2003-12-05 | Matsushita Electric Ind Co Ltd | 符号量制御装置 |
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-
2004
- 2004-11-05 JP JP2004322296A patent/JP2005333609A/ja active Pending
-
2005
- 2005-04-20 TW TW94112621A patent/TWI251984B/zh not_active IP Right Cessation
- 2005-04-21 KR KR20050033094A patent/KR100711672B1/ko not_active IP Right Cessation
- 2005-04-22 US US11/112,712 patent/US7680344B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529950A (ja) * | 1991-07-19 | 1993-02-05 | Toshiba Corp | 符号量制御装置 |
JPH11234668A (ja) * | 1998-02-13 | 1999-08-27 | Sony Corp | 映像符号化装置 |
JP2002223439A (ja) * | 2001-01-25 | 2002-08-09 | Canon Inc | 画像圧縮符号化装置及び方法並びにプログラム |
JP2003348590A (ja) * | 2002-05-23 | 2003-12-05 | Matsushita Electric Ind Co Ltd | 符号量制御装置 |
Also Published As
Publication number | Publication date |
---|---|
TW200536279A (en) | 2005-11-01 |
TWI251984B (en) | 2006-03-21 |
US20050249424A1 (en) | 2005-11-10 |
KR100711672B1 (ko) | 2007-04-27 |
US7680344B2 (en) | 2010-03-16 |
KR20060047331A (ko) | 2006-05-18 |
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