JP2006525716A - ディジタルフィルタ構造 - Google Patents
ディジタルフィルタ構造 Download PDFInfo
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- JP2006525716A JP2006525716A JP2006506508A JP2006506508A JP2006525716A JP 2006525716 A JP2006525716 A JP 2006525716A JP 2006506508 A JP2006506508 A JP 2006506508A JP 2006506508 A JP2006506508 A JP 2006506508A JP 2006525716 A JP2006525716 A JP 2006525716A
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- JP
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- Prior art keywords
- filter
- coefficients
- coefficient
- phase
- filter coefficients
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0248—Filters characterised by a particular frequency response or filtering method
- H03H17/0264—Filter sets with mutual related characteristics
- H03H17/0273—Polyphase filters
- H03H17/0275—Polyphase filters comprising non-recursive filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0223—Computation saving measures; Accelerating measures
- H03H17/0227—Measures concerning the coefficients
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/06—Non-recursive filters
- H03H17/0621—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Mathematical Physics (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Picture Signal Circuits (AREA)
- Image Processing (AREA)
- Studio Circuits (AREA)
- Optical Communication System (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
F2=E,F,G ここで、Eは第1の係数、Fは第2の係数、以下同様。
係数1:(k=1、x=4、y=3)
z=0 z=1 z=2
y−z=3−>G y−z=2−>F y−z=1−>E
k−y+1+z=−1−>0 k−y+1+z=0−>0 k−y+1+z=1−>A
→G*0+F*0+E*A=E*A
係数1=E*A
係数2:(k=2、x=4、y=3)
z=0 z=1 z=2
y−z=3−>G y−z=2−>F y−z=1−>E
k−y+1+z=0−>0 k−y+1+z=1−>A k−y+1+z=2−>B
→G*0+F*A+E*B=F*A+E*B
係数2=F*A+E*B
上記式の対応する適用を用いて、残りの係数に関して以下が得られる。
係数3=C*E+F*B+A*G
係数4=D*E+C*F+B*G
係数5=D*F+C*G
係数6=G*D
F2=A,B,C,D ここで、Aは第1の係数、Bは第2の係数、以下同様。
係数1:(k=1、x=3、y=4)
z=0 z=1 z=2
y−z=4−>D y−z=3−>C y−z=2−>B
k−y+1+z=−2−>0 k−y+1+z=−1−>0 k−y+1+z=0−>0
z=3
y−z=1−>A
k−y+1+z=1−>E
D*0+C*0+B*0+A*E=E*A
係数1=E*A
係数2:(k=2、x=3、y=4)
z=0 z=1 z=2
y−z=4−>D y−z=3−>C y−z=2−>B
k−y+1+z=−1−>0 k−y+1+z=0−>0 k−y+1+z=1−>E
z=3
y−z=1−>A
k−y+1+z=2−>F
D*0+C*A+B*E+A*F=F*A+E*B
係数2=F*A+E*B
上記式の対応する適用を用いて、残りの係数に関して以下が得られる。
係数3=C*E+F*B+A*G
係数4=D*E+C*F+B*G
係数5=D*F+C*G
係数6=G*D
Claims (4)
- ディジタルビデオ信号をフィルタ処理するためのディジタルフィルタ構造において、多相フィルタであるローパスフィルタの形態をなす一つのズームフィルタの機能と、ハイパスフィルタの形態をなす少なくとも一つのピーキングフィルタの機能とが実現され、二つのフィルタの機能が集積回路内において複合フィルタにより実現され、それにより、設定されるズームフィルタの各相毎に、ズームフィルタのこの相のために記憶されたフィルタ係数から、及び、ピーキングフィルタのために記憶されたフィルタ係数から、複合フィルタ係数が計算され、前記複合フィルタ係数は、フィルタリングプロセスにおいてフィルタ処理されるビデオ信号に適用され、それにより、このフィルタリングプロセスにおいては複合フィルタ係数を用いて両方のフィルタ機能が実行されることを特徴とするディジタルフィルタ構造。
- 係数の値の範囲がオフセットを受け、負の値がもはや生じず、従って、符号ビットが記憶されず、フィルタ係数の読み出し後であってフィルタにおけるその適用前に前記オフセットが取り消されるように、多相フィルタにおけるフィルタ係数が記憶されることを特徴とする請求項1に記載のディジタルフィルタ構造。
- rは相の連続番号であり、qは相の総数であるとするとき、フィルタ係数が所望のq個の相のうちの(q/2)個に関して記憶され且つ残余の相におけるフィルタ係数が記憶されたフィルタ係数から計算されるように、多相フィルタにおけるx個のフィルタ係数のデータ整理が適用され、それにより、相Pq−rの係数の組を計算すべく、相prの記憶されたフィルタ係数が使用されて、それらの順番が逆転されることを特徴とする請求項1に記載のディジタルフィルタ構造。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03101181 | 2003-04-29 | ||
PCT/IB2004/001226 WO2004098054A1 (en) | 2003-04-29 | 2004-04-22 | Digital filter configuration |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006525716A true JP2006525716A (ja) | 2006-11-09 |
JP4597965B2 JP4597965B2 (ja) | 2010-12-15 |
Family
ID=33395955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006506508A Expired - Fee Related JP4597965B2 (ja) | 2003-04-29 | 2004-04-22 | ディジタルフィルタ構造 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8184922B2 (ja) |
EP (1) | EP1620944B1 (ja) |
JP (1) | JP4597965B2 (ja) |
CN (1) | CN1781249B (ja) |
AT (1) | ATE376281T1 (ja) |
DE (1) | DE602004009558T2 (ja) |
WO (1) | WO2004098054A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4483501B2 (ja) | 2004-09-22 | 2010-06-16 | 株式会社ニコン | 静止画を動画再生するための前処理を行う画像処理装置、プログラム、および方法 |
JP5125294B2 (ja) * | 2007-07-31 | 2013-01-23 | 株式会社ニコン | プログラム、画像処理装置、撮像装置および画像処理方法 |
US8638852B2 (en) * | 2008-01-08 | 2014-01-28 | Qualcomm Incorporated | Video coding of filter coefficients based on horizontal and vertical symmetry |
CN103647523B (zh) * | 2013-12-16 | 2016-06-01 | 电子科技大学 | 一种降低窄过渡带fir低通滤波器实现复杂度的方法 |
CN111211759B (zh) * | 2019-12-31 | 2022-03-25 | 京信网络系统股份有限公司 | 滤波器系数确定方法、装置和数字das系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5422827A (en) * | 1993-02-12 | 1995-06-06 | Cirrus Logic, Inc. | Integrated video scaling and sharpening filter |
JP2000504520A (ja) * | 1996-10-31 | 2000-04-11 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | サンプル比変換の改善 |
US20020012390A1 (en) * | 2000-06-22 | 2002-01-31 | Kim Sang Yeon | Filter coefficient generator |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US5027306A (en) * | 1989-05-12 | 1991-06-25 | Dattorro Jon C | Decimation filter as for a sigma-delta analog-to-digital converter |
US5511015A (en) * | 1993-11-30 | 1996-04-23 | Loral Vought Systems Corporation | Double-accumulator implementation of the convolution function |
KR970001314B1 (ko) * | 1994-04-14 | 1997-02-05 | 엘지반도체 주식회사 | 디지탈 필터 |
US6275781B1 (en) * | 1997-07-29 | 2001-08-14 | Skf Condition Monitoring, Inc. | Vibration data processor and processing method |
US5973740A (en) * | 1997-10-27 | 1999-10-26 | International Business Machines Corporation | Multi-format reduced memory video decoder with adjustable polyphase expansion filter |
US6321246B1 (en) * | 1998-09-16 | 2001-11-20 | Cirrus Logic, Inc. | Linear phase FIR sinc filter with multiplexing |
US6317765B1 (en) * | 1998-09-16 | 2001-11-13 | Cirrus Logic, Inc. | Sinc filter with selective decimation ratios |
US6424749B1 (en) * | 1999-03-30 | 2002-07-23 | Matsushita Electric Industrial Co., Ltd. | System and method for scaling combined video and computer generated imagery |
US6411305B1 (en) * | 1999-05-07 | 2002-06-25 | Picsurf, Inc. | Image magnification and selective image sharpening system and method |
JP2001051672A (ja) * | 1999-08-05 | 2001-02-23 | Neucore Technol Inc | 画像処理装置 |
US6570907B1 (en) * | 1999-10-04 | 2003-05-27 | Ericsson Inc. | Simplified finite impulse response (FIR) digital filter for direct sequencespread spectrum communication |
US6600495B1 (en) | 2000-01-10 | 2003-07-29 | Koninklijke Philips Electronics N.V. | Image interpolation and decimation using a continuously variable delay filter and combined with a polyphase filter |
JP3677188B2 (ja) * | 2000-02-17 | 2005-07-27 | セイコーエプソン株式会社 | 画像表示装置および方法、並びに、画像処理装置および方法 |
US6941025B2 (en) * | 2001-04-19 | 2005-09-06 | International Business Machines Corporation | Simultaneous vertical spatial filtering and chroma conversion in video images |
US6963890B2 (en) * | 2001-05-31 | 2005-11-08 | Koninklijke Philips Electronics N.V. | Reconfigurable digital filter having multiple filtering modes |
US20030080981A1 (en) * | 2001-10-26 | 2003-05-01 | Koninklijke Philips Electronics N.V. | Polyphase filter combining vertical peaking and scaling in pixel-processing arrangement |
US7007052B2 (en) * | 2001-10-30 | 2006-02-28 | Texas Instruments Incorporated | Efficient real-time computation |
FR2849330A1 (fr) | 2002-12-18 | 2004-06-25 | Koninkl Philips Electronics Nv | Convertisseur numerique de frequence d'echantillonnage |
-
2004
- 2004-04-22 DE DE602004009558T patent/DE602004009558T2/de not_active Expired - Lifetime
- 2004-04-22 JP JP2006506508A patent/JP4597965B2/ja not_active Expired - Fee Related
- 2004-04-22 US US10/554,530 patent/US8184922B2/en not_active Expired - Fee Related
- 2004-04-22 WO PCT/IB2004/001226 patent/WO2004098054A1/en active IP Right Grant
- 2004-04-22 CN CN200480011571XA patent/CN1781249B/zh not_active Expired - Fee Related
- 2004-04-22 EP EP04728855A patent/EP1620944B1/en not_active Expired - Lifetime
- 2004-04-22 AT AT04728855T patent/ATE376281T1/de not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5422827A (en) * | 1993-02-12 | 1995-06-06 | Cirrus Logic, Inc. | Integrated video scaling and sharpening filter |
JP2000504520A (ja) * | 1996-10-31 | 2000-04-11 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | サンプル比変換の改善 |
US20020012390A1 (en) * | 2000-06-22 | 2002-01-31 | Kim Sang Yeon | Filter coefficient generator |
Also Published As
Publication number | Publication date |
---|---|
US8184922B2 (en) | 2012-05-22 |
CN1781249B (zh) | 2011-08-31 |
WO2004098054A1 (en) | 2004-11-11 |
ATE376281T1 (de) | 2007-11-15 |
EP1620944B1 (en) | 2007-10-17 |
DE602004009558T2 (de) | 2008-02-07 |
CN1781249A (zh) | 2006-05-31 |
DE602004009558D1 (de) | 2007-11-29 |
JP4597965B2 (ja) | 2010-12-15 |
US20060285019A1 (en) | 2006-12-21 |
EP1620944A1 (en) | 2006-02-01 |
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