CN1042785C - 用于使帧频加倍的方法与装置 - Google Patents
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- CN1042785C CN1042785C CN93114416A CN93114416A CN1042785C CN 1042785 C CN1042785 C CN 1042785C CN 93114416 A CN93114416 A CN 93114416A CN 93114416 A CN93114416 A CN 93114416A CN 1042785 C CN1042785 C CN 1042785C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
- H04N7/012—Conversion between an interlaced and a progressive signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
- H04N7/0132—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter the field or frame frequency of the incoming video signal being multiplied by a positive integer, e.g. for flicker reduction
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Abstract
在源信号是隔行模式的情形中,最开始是将其转换成逐行的源信号(PRO)。随后,图像单元被产生,处于“逐行”图象单元之间,并利用垂直内插方法对这些图象单元进行垂直1/2行混合内插(LSH)。该已内插的图象单元被被缓冲存储并再次以两倍帧再现速率被读出,从而该被存储的内插图象单元的每一个第二行在时间上被延时10ms(SIL)发送。从而保证场是以100HZ,2∶1的格式。为增加主观清晰度,可以附带进行垂直峰化(VPEA)。
Description
本发明涉及用于使帧频加倍的一种方法及装置。
传统上,为了使电视设备的帧频加倍,每一场被重复现两次(AABB),或者,第二个再生场是从被传输的第一场内插而得,第三场是由传输的第二场内插而得到,且第四场是作为第二场传输的重复所产生(AA′B′B)。然而由于行闪烁或移动假象,则会产生干拢。
采用对称的双中值滤波的帧频加倍的方案已由DE-A-4220662号专利申请实现。首先,输入场的行之间的行图象单元由一垂直暂态中值滤波器计算。借助于时间均值的形成,具有双倍帧频的连续场从这些连续的内插场产生出来,这些连续的内插场具有诸如50Hz的帧频。然而,如果人为地对这些信号进行隔行再现,就会出现25Hz的干扰,因为在每一时刻,两个连续的100Hz场只包含非内插的图象单元。
本发明的目的是提供一种使帧频加倍而具有隔行输出帧的改进方法和设备。
为此,本发明提供了一种使帧频加倍的方法,其中输入信号为逐行模式,输出信号为隔行模式,所述方法包括以下步骤:
通过对垂直方向彼此叠置的即时逐行输入帧的图象单元每一组(P1,P2i,或P2i,P1)的插值,得出沿垂直方向在输入行之间的图象单元(P1A或P2B);每第二个如此形成的行的内插图象单元(P1A)产生一个第一输出场;其它如此形成的行的内插图象单元(P2B)被延时发送,其延时量对应于隔行输出场的场持续时间,并由此产生一个第二输出场。
此外,本发明还提供了用于实现上述方法的装置,所述装置包括:一个行延时装置(LD),它的输出信号在随后的加法器(ADD1)中与其包含有逐行帧的图象单元值的输入信号相结合;一个连在该加法器之后的除法器(DIV),它平分图象单元值,并在每个场合形成两个即时逐行输入帧的垂直相邻图象单元(P1,P2i或P2i,P1)的平均值,作为在垂直方向处于输入行之间的图象单元(P1A或P2B),所述平均值在垂直方向位移半行;连接在该除法器之后的场存储器装置(FD),用于存储所述图象单元的平均值,在控制电路(CON)的控制之下,该存储装置以加倍的帧频读出被缓冲存储的隔行模式的图象单元的平均值,其中,每隔一行的图象单元平均值被延迟相当于以隔行模式输出的场的持续时间的时间。
在源信号是隔行模式的情形中,先将其转换成逐行的源信号。有益的是,这种转换由在DE-A-4211955中所描述的或其它的已知隔行-逐行的转换方法实现。
在DE-A-4211955号申请中,将被确定的逐行模式输入帧(INP+INT)的图象单元(INT)是借助于一个第一时间中值滤波以及第二垂直中值滤波而获得,具有相同的空间位置、在时间上与即时图像单元(P2i)相邻的隔行图像单元,以及在垂直方向上与即时图像单元相邻的隔行图像单元(P1,P3)的一个平均值被用于第一中值滤波,并且,所述在垂直方向上相邻的隔行图像单元和第一中值滤波器的输出信号被用于第二中值滤波。随后,图象单元被产生,处于“逐行”图象单元之间,并利用垂直内插的方法对这些图象单元进行垂直1/2行混合(1/2行移位)的内插。在最简单的情况中,这种垂直内插是图象单元的一个垂直平均。已内插的图象单元(格式为50Hz 1∶1)被缓冲器存储并以两倍的帧频被再次读出,因而其已存内插图象单元的第二行在时间上被延迟10ms发送。从而产生格式为100Hz,2∶1的输出场。结果是,已内插的图象单元被用于输出信号的所有的场,从而避免了上述的25Hz的干扰。客观上,必要的半行移动当受到干扰时不被查觉。
此外,已内插的图象单元在该100Hz的发送以前可受到一垂直峰化(提高高频成分的幅值),以便获得一个实际上改进的垂直清晰度。
有利的是,由于双对称滤波,上述的移动假像被大为抑制。
借助于附图的帮助,来描述本发明的实施例。图中示出:
图1为内插示意图;
图2为根据本发明的简化方框电路图;
图3为根据本发明的用于加倍帧频的装置的方框电路图。
输入图象单元INP有20ms(50Hz)的时间间隔,并且如图1A所示,内插成输入场的图象单元(INT)在该图示被表示成垂直暂态扫描光栅,在50Hz格式中,帧,结果是1∶1。根据示于图1B中的本发明的加倍帧频,产生出相应的输出图象单元RES具有10ms(100Hz)的时间间隔的结果。
由图象单元P1和P2所确定的图象单元P2i由图2C所示的那样是彼此在垂直方向上叠落的。图象单元P1、P2i和P2导致逐行50Hz的图象。
被内插的图象单元P1A和P2B如图1D所示:
P1A=(P1+P2i)/2;
P2B=(P2i+P3)/2。
根据格式的100Hz,2∶1,在图1D中被内插的图象单元被排列成图1E。
在一个如图2所示的内插-逐行转换器PRO中,50Hz的已内插输入帧被转换成50Hz,1∶1的格式。该内插图象单元处在输入行之间是由垂直平均值的格式所决定的,即是由在紧随其后的行混合器LSH中的垂直PIR滤波器装置所决定。随后,利用垂直FIR滤波器在一个峰化电路VPEA中可进行垂直峰化。最终,在电路SIL中,出现一合成交错。输出信号具有格式为100Hz,2∶1。
在图8中,格式为50Hz,1∶1的输入图象单元值被送到第一行延时装置LD以及第一加法器ADD1,在该加法器中,来自LD的输出信号与输入信号组合。ADD1的输出连接到一个除法器DIV的输入,它通过一个诸如移位的操作对其进行2等分。从DIV输出的信号送到受电路CON控制的场存储器FD。该控制电路使得格式为50Hz 1∶1的分别的各行1、2、……n被连续地读入到FD中,并使得行1、3、……n-1以及2,4,……N以格式为100Hz,2∶1的格式连续地读出。新的行2读入之后只是在旧的行2已被发送之后才生效。具有诸如5个复合系数(K2,K1,K0,K1,K2)的峰化滤波器可被选择地插在DIV和FD之间。从DIV输出的信号串行地送到四个行延时装置LD1、LD2、LD3和LD4。这些行延时装置的输出以及LD1的输入被分别地以对应于乘法器M1-M5的相关系数被加权。这些乘法器的输出信号在一个第二加法器ADD2内被相加并送到场存储器FD。
在帧中的行数可以是525、625、1050、1125或1250,从而场存储器FD的存储时间被相应地配合。
本发明同样可以用于59.94或60Hz的帧频。
Claims (5)
1.一种使逐行输入帧的帧频加倍并以加倍的帧频输出隔行场的方法,其特征是:
-通过对垂直方向彼此叠置的即时逐行输入帧的图象单元每一组(P1,P2i,或P2i,P1)的插值,得出沿垂直方向在输入行之间的图象单元(P1A或P2B);
-每第二个如此形成的行的内插图象单元(P1A)产生一个第一输出场;
-其它如此形成的行的内插图象单元(P2B)被延时发送,其延时量对应于隔行输出场的场持续时间,并由此产生一个第二输出场。
2.根据权利要求1的方法,其特征是,在信号源是隔行信号(INP)的情况下,被确定的逐行输入帧(INP+INT)的图象单元(INT)是借助于一个第一暂态中值滤波以及第二垂直中值滤波而获得的,具有相同的空间位置、在时间上与即时图像单元(P2i)相邻的隔行图像单元,以及在垂直方向上与即时图像单元相邻的隔行图像单元(P1,P3)的一个平均值被用于第一中值滤波,并且,所述在垂直方向上相邻的隔行图像单元和第一中值滤波器的输出信号被用于第二中值滤波。
3.根据权利要求1或2的方法,其特征是,在发送以前,由插值获得的图象单元(P1A或P2B)被垂直峰化滤波器(VPEA)滤波。
4.用于实现根据权利要求1-3中任一项的方法的装置,它具有:
-一个行延时装置(LD),它的输出信号在随后的加法器(ADD1)中与其包含有逐行帧的图象单元值的输入信号相结合;
-一个连在该加法器之后的除法器(DIV),它平分图象单元值,并在每个场合形成两个即时逐行输入帧的垂直相邻图象单元(P1,P2i或P2i,P1)的平均值,作为在垂直方向处于输入行之间的图象单元(P1A或P2B),所述平均值在垂直方向位移半行;
-连接在该除法器之后的场存储器装置(FD),用于存储所述图象单元的平均值,在控制电路(CON)的控制之下,该存储装置以加倍的帧频读出被缓冲存储的隔行模式的图象单元的平均值,其中,每隔一行的图象单元平均值被延迟相当于以隔行模式输出的场的持续时间的时间。
5.根据权利要求4的装置,其特征是,所述图象单元的平均值通过在除法器(DIV)和场存储器(FD)之间的一个垂直峰化滤波器(VPEA)滤波。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4233354A DE4233354A1 (de) | 1992-10-05 | 1992-10-05 | Verfahren und Vorrichtung zur Bildwechselfrequenz-Verdoppelung |
DEP4233354.7 | 1992-10-05 |
Publications (2)
Publication Number | Publication Date |
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CN1093513A CN1093513A (zh) | 1994-10-12 |
CN1042785C true CN1042785C (zh) | 1999-03-31 |
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CN93114416A Expired - Fee Related CN1042785C (zh) | 1992-10-05 | 1993-10-05 | 用于使帧频加倍的方法与装置 |
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Country | Link |
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US (1) | US5517247A (zh) |
EP (1) | EP0591794B1 (zh) |
JP (1) | JP3497213B2 (zh) |
KR (1) | KR100270493B1 (zh) |
CN (1) | CN1042785C (zh) |
DE (2) | DE4233354A1 (zh) |
ZA (1) | ZA937376B (zh) |
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EP0653839B1 (en) * | 1993-03-23 | 2001-05-30 | Sony Corporation | Rate converter and imaging apparatus |
CA2197414A1 (en) * | 1996-02-14 | 1997-08-14 | Stephen G. Glennon | Methods and systems for displaying interlaced video on non-interlaced monitors |
US5963261A (en) * | 1996-04-29 | 1999-10-05 | Philips Electronics North America Corporation | Low cost scan converter for television receiver |
US6222589B1 (en) * | 1996-08-08 | 2001-04-24 | Yves C. Faroudja | Displaying video on high-resolution computer-type monitors substantially without motion discontinuities |
US6141056A (en) * | 1997-08-08 | 2000-10-31 | Sharp Laboratories Of America, Inc. | System for conversion of interlaced video to progressive video using horizontal displacement |
US6262773B1 (en) | 1997-09-15 | 2001-07-17 | Sharp Laboratories Of America, Inc. | System for conversion of interlaced video to progressive video using edge correlation |
US6108041A (en) * | 1997-10-10 | 2000-08-22 | Faroudja Laboratories, Inc. | High-definition television signal processing for transmitting and receiving a television signal in a manner compatible with the present system |
US6014182A (en) | 1997-10-10 | 2000-01-11 | Faroudja Laboratories, Inc. | Film source video detection |
US6040869A (en) * | 1998-03-31 | 2000-03-21 | Matsushita Electric Industrial Co. Ltd. | Method and apparatus for converting an interlace-scan video signal into a non-interlace-scan video signal |
US6124893A (en) * | 1998-04-29 | 2000-09-26 | Stapleton; John J. | Versatile video transformation device |
US7536706B1 (en) | 1998-08-24 | 2009-05-19 | Sharp Laboratories Of America, Inc. | Information enhanced audio video encoding system |
JP3821415B2 (ja) * | 1998-09-30 | 2006-09-13 | 日本ビクター株式会社 | 動画像フォーマット変換装置及びその方法 |
KR100587263B1 (ko) * | 1999-03-27 | 2006-06-08 | 엘지전자 주식회사 | 비디오 신호의 프레임 율 변환 방법 |
JP3837690B2 (ja) * | 1999-12-03 | 2006-10-25 | パイオニア株式会社 | 映像信号処理装置 |
JP2003526999A (ja) * | 2000-03-15 | 2003-09-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | ピーキングフィルタを有するビデオ装置 |
US7647340B2 (en) | 2000-06-28 | 2010-01-12 | Sharp Laboratories Of America, Inc. | Metadata in JPEG 2000 file format |
US6690427B2 (en) * | 2001-01-29 | 2004-02-10 | Ati International Srl | Method and system for de-interlacing/re-interlacing video on a display device on a computer system during operation thereof |
KR100941388B1 (ko) * | 2001-04-24 | 2010-02-10 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 비디오 신호 발생 방법 |
US7440030B2 (en) * | 2001-09-24 | 2008-10-21 | Broadcom Corporation | Method and apparatus for interlaced display of progressive video content |
US20030095202A1 (en) * | 2001-11-21 | 2003-05-22 | Ferguson Kevin M. | Human vision model based slow motion interpolation |
EP1503333A1 (en) * | 2003-08-01 | 2005-02-02 | Sony International (Europe) GmbH | Correction of non-uniform image display |
CN1326399C (zh) * | 2004-04-29 | 2007-07-11 | 华亚微电子(上海)有限公司 | 隔行视频流到逐行视频流的转换方法与系统 |
US8300987B2 (en) * | 2007-09-28 | 2012-10-30 | Ati Technologies Ulc | Apparatus and method for generating a detail-enhanced upscaled image |
US8964117B2 (en) * | 2007-09-28 | 2015-02-24 | Ati Technologies Ulc | Single-pass motion adaptive deinterlacer and method therefore |
US8259228B2 (en) * | 2007-12-10 | 2012-09-04 | Ati Technologies Ulc | Method and apparatus for high quality video motion adaptive edge-directional deinterlacing |
US8396129B2 (en) * | 2007-12-28 | 2013-03-12 | Ati Technologies Ulc | Apparatus and method for single-pass, gradient-based motion compensated image rate conversion |
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1993
- 1993-09-25 DE DE59307199T patent/DE59307199D1/de not_active Expired - Lifetime
- 1993-09-25 EP EP93115504A patent/EP0591794B1/de not_active Expired - Lifetime
- 1993-10-05 KR KR1019930020454A patent/KR100270493B1/ko not_active IP Right Cessation
- 1993-10-05 US US08/132,148 patent/US5517247A/en not_active Expired - Lifetime
- 1993-10-05 CN CN93114416A patent/CN1042785C/zh not_active Expired - Fee Related
- 1993-10-05 ZA ZA937376A patent/ZA937376B/xx unknown
- 1993-10-05 JP JP24916193A patent/JP3497213B2/ja not_active Expired - Fee Related
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EP0477823A2 (en) * | 1990-09-25 | 1992-04-01 | Salora Oy | Method and apparatus for digital interpolation of a pixel |
Also Published As
Publication number | Publication date |
---|---|
JP3497213B2 (ja) | 2004-02-16 |
DE4233354A1 (de) | 1994-04-07 |
CN1093513A (zh) | 1994-10-12 |
EP0591794A1 (de) | 1994-04-13 |
ZA937376B (en) | 1994-04-29 |
US5517247A (en) | 1996-05-14 |
DE59307199D1 (de) | 1997-10-02 |
JPH06205376A (ja) | 1994-07-22 |
KR940010678A (ko) | 1994-05-26 |
KR100270493B1 (ko) | 2000-11-01 |
EP0591794B1 (de) | 1997-08-27 |
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