CN1178471C - 用于dvd重现装置的混合方法及混合系统 - Google Patents
用于dvd重现装置的混合方法及混合系统 Download PDFInfo
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Abstract
一种用于在可记录的DVD播放器中提供混合效果的方法,其包括下面几个步骤。在步骤(a),可以将第一和第二解码视频比特流帧提供到混合器。在步骤(b),可以加权第一和第二解码视频比特流帧。特别地,第一解码视频比特流帧根据加权系数Kn加权,第二解码视频比特流帧根据加权系数(1-Kn)加权。在步骤(c),加权视频比特流帧在混合器中混合。混合形成合成视频比特流帧。最后,在步骤(d),重复步骤(a)-(c)的每一步,以形成连续的第一和第二解码视频比特流帧对。此外,在重复的过程中,加权系数Kn的数值可以相对于每个所述连续的第一和第二解码视频比特流帧对增加。
Description
技术领域
本发明涉及一种为记录在盘形介质如可记录的数字视频盘、硬盘和磁光盘上的仅视频、仅音频以及视频和音频节目提供有高级操作功能的方法和装置。
背景技术
现已开发了各种使消费者可以为了随后的播放而记录视频和/或音频节目的装置。这些装置包括磁带录音机、录像机、可记录光盘和最近的可记录的数字通用盘(DVD)。硬盘和磁光盘也已被使用。其上仅可以记录一次并因此基本上是DVD只读存储器的DVD被缩写为DVD-R。缩写DVD-R还通常用于指一次性写入或一次性记录技术。与DVD-R相反,在DVD上记录、擦除和重记录数据可以采用几种格式。总体而言,这种DVD可以被覆写或重写。这些DVD典型的被缩写为DVD-RAM、DVD-RW和DVD+RW。虽然,目前为止还没有采用统一的工业标准,但是缩写DVD-RAM、DVD-RW和DVD+RW还通常用于指各种可重写的DVD技术。此外,这里谈到的可重写的DVD技术、装置和方法通常包括所有现在以及将来被使用的标准。
现在的DVD可以具有存储视听内容的逻辑文件结构。特别地,如图5中所示,在DVD 500的文件结构分层的顶端,一个或多个的标题501以与节目情节标题(program episode title)松散相关的方式存在。标题501可以包括控制数据502和一个或多个的视频对象组503(VOBS)。控制数据502可以包括用于管理标题501的信息。每个VOBS 503可以包括多个视频对象(VOB)504。每个VOB 504最好包括多个片(cell)505。每个片505最好包括多个视频对象单元(VOBU)506。每个VOBU 506大体与一组画面相关,该画面是DVD 500中最小的可寻址块(addressable chunk)。
特别地,每个VOBU 506包括整数个视频帧,典型的是15帧。因此,每个VOBU 506可以包括0.4到1.0秒的画面素材。在商业活动画面中的典型的VOBU 506可以包括0.5秒的画面素材。特别地,每个VOBU 506可以包括一系列以记录顺序排列的分组507。每个VOBU 506最好可以开始于其后跟随有视听数据分组509如视频分组(V_PCK)、音频分组(A_PCK)和子画面分组(SP_PCK)的导航分组508(NV_PCK或NAV_PACK)。NV_PCK 508可以包括导航信息,其在执行操作的特技模式中是十分有用的。NV_PCK 508还包括显示控制信息(PCI)和数据搜索信息(DSI)。
尽管可以采用可重写DVD技术,但是操作还是被如播放、记录、快速向前翻转和停止的基本功能所限制。可以采用暂停,但其仅与VCR中的暂停操作相似,例如中断事先录制的节目的回放或中断观看节目的记录以从记录中消除广告。不同于计算机硬盘,可记录的DVD装置具有十分重要的附加功能,该功能可以回放预先记录的DVD节目。因此,发展包括方法和装置的可用于替代计算机硬盘的可重写DVD技术是有经济激励的。提供这种具有改进的、便利的功能而不损害减少成本并增加销售的目标的装置是有困难的。一个对于可记录的DVD很重要的功能是使用户可以消隐和混合图像。消隐使得视频显示图像或静止画面可以缓慢地或迅速地渐显或渐隐。通常,消隐用于视频段的开始、段的结束或从一段到另一段的过渡。消隐效果通常包括在渐显下面的视频或图像之前完全渐隐视频或静止画面图像。相比之下,混合可以包括视频或静止画面渐隐的同时另一视频或静止画面渐显。消隐和混合使得消费者可以制作高质量的家庭视频效果。例如,消隐和混合使得从一个视频段到下一个视频段可以平稳过渡。由于消隐和混合能力不能直接用在现在的可记录的DVD系统中,因此希望提供成本效果合算的方式来实现这种功能。
发明内容
一种用于在可记录的DVD播放器中提供混合效果的方法,其包括下面几个步骤。在步骤(a),可以将第一和第二解码视频比特流帧提供到混合器。在步骤(b),可以加权第一和第二解码视频比特流帧。特别地,第一解码视频比特流帧根据加权系数Kn加权,第二解码视频比特流帧根据加权系数(1-Kn)加权。在步骤(c),加权视频比特流帧可以在混合器中混合。混合形成合成视频比特流帧。最后,在步骤(d),可以重复步骤(a)-(c)的每一步,以形成连续的第一和第二解码视频比特流帧对。此外,在重复的过程中,加权系数Kn的数值可以相对于每个所述连续的第一和第二解码视频比特流帧对增加。特别地,合成视频比特流帧可以提供到电视显示器。同样,合成视频比特流帧还可以存储于显示缓冲器内。
不同种类的混合最好依靠使用混合效果时的情况。例如,混合可以包括静止画面渐隐的同时视频渐显,视频渐隐的同时静止画面渐显。同样,本发明的步骤可以包括从视频比特流中提取解码视频比特流帧;在静止图像缓冲器中存储解码视频比特流帧;和,将静止图像缓冲器内的解码视频比特流帧和解码视频比特流内的连续的解码视频比特流帧提供到混合器。结果,连续的第一和第二解码视频比特流帧对包括在静止图像缓冲器内的第一解码视频比特流帧和在视频比特流内的连续的解码视频比特流帧。
可选择地,混合可以包括视频渐隐的同时其他视频渐显。在这种情况下,本发明的步骤包括交替解码第一视频比特流内的帧和第二视频比特流内的帧;延迟将从第一视频比特流帧得到的解码帧提供到混合器;和,同时将从第二视频比特流得到的解码帧和从第一视频比特流得到的延迟的解码帧提供到混合器。由此,连续的第一和第二解码视频比特流帧对包括从第一解码视频比特流得到的连续延迟的帧和从第二视频比特流得到的连续解码的帧。一旦视频比特流帧被混合,合成视频比特流可以被再编码。更具体的说,再编码步骤可以包括MPEG编码所合成的视频比特流帧。
根据本发明的混合系统构成可以包括第一和第二解码视频比特流帧;加权系统,用于加权第一和第二解码视频比特流帧;和混合器,用于同时混合加权视频比特流帧,混合形成合成的视频比特流帧。
在这种情况下,第一解码视频比特流帧根据加权系数Kn加权,第二解码视频比特流帧根据加权系数(1-Kn)加权。
在发明的一方面,系统还可以包括用于存储第一解码视频比特流帧的静止图像缓冲器。应当注意,静止图像缓冲器可以同时提供第一解码视频比特流帧和第二解码视频比特流帧。在本发明的另一方面,系统可以包括用于延迟第一解码视频比特流帧到混合器中的传送的延迟块。在本发明的该方面中,混合器可以接收第二解码视频比特流帧,以同时混合接收的延迟的第一解码视频比特流帧。
附图说明
图1是根据本发明的具有一个或多个高级操作功能的可重写的DVD装置的方框图。
图2是可记录的DVD介质的示意图。
图3是根据本发明的用于静止画面渐隐的同时视频或运动画面渐显的混合功能的方框图。
图4是用于重现渐隐一个视频比特流的同时渐显其他视频比特流的系统的方框图。
图5是DVD文件结构分层的方框图。
具体实施方式
可记录的DVD装置
用于执行弥补根据本发明所描述的可重写的盘形介质的问题的方法的装置100如图1中的方框图形式所示,其中使用了根据本发明的可记录的、可重写的盘形介质102。可重写的盘形介质102在本实施例中具体为可重写的DVD。在很多实例中,应当指出,可重写盘形介质可以是如硬盘或磁光盘(MOD)。MOD的一个例子是小型盘。在很多实例中,本发明的设计可以应用于视频或音频或视频和音频二者。
装置100可以向可记录的DVD介质写入和从可记录的DVD介质读取,在本实例中,可记录的DVD介质是可重写的DVD 102。该装置具有机械装置104、控制部分120、视频/音频输入处理通道140和视频/音频输出处理通道190。大部分块与不同的部分或通道之间的位置关系是不言自明的,而一些块的位置设置是为了方便的目的,其对理解装置的操作并无重大影响。
机械装置104包括用于旋转盘102的马达106和适合在旋转的盘上移动的拾取装置108。拾取器108和马达106由伺服系统110控制。伺服系统110可以接收数据的回放信号作为第一输入,该数据的回放信号可以从盘102的螺旋轨道中读出来。回放信号也可以是误差校正电路130的输入,该电路被认为是控制部分的一部分或视频/音频输出处理通道的一部分。
当从盘102中读出数据时,拾取装置108上的激光器可以向盘102的内层表面发出激光。基于存储在盘102上的数据,激光大部分被反射或大部分被吸收。拾取装置108可以将反射的光线译为一种电信号,而由盘102的内层表面吸收的光线可以被译为第二种电信号。在优选实施方式中,反射率和非反射率之间的转换映射成作为所谓的回放信号的数字信号,该回放信号相应于存储在盘102上的数据。
比较起来,在记录期间,拾取装置上的激光器在盘102上的螺旋轨道上烧制点迹,以数字地记录视频和/或音频节目素材。更具体地说,可包括至少一个内侧晶体记录层的盘102可以呈现出两种特殊的状态,非晶态或结晶态,每个都具有不同的反射特性。不同的反射率水平可以由拾取装置108中的光学传感器检测。
在记录之前,盘的内侧记录层处于呈现高反射率的结晶态。激光束的光强度可以被调制以在内侧结晶记录层的轨道表面上写入非晶态数据标记。特别地,激光脉冲的能量可以迅速升高内侧结晶记录层的表面温度,使其超过该层的熔点。一旦超过熔点,内层将从具有高反射率的结晶态转变为具有低反射率的非晶态。随后,层的快速冷却避免了内层的分子结构重组为结晶态。因此,数字数据可以映射为一系列激光脉冲,其可以将相应于数字数据的数字编码写入盘102。
特别地,根据容量需求,盘102可以具有一个或两个可记录面。此外,盘102可以每面具有多个可记录层。然而,为了理解本发明,面和层的数量是无关的。另外,在双面记录的情况下,盘102的两面记录发生在盘102的一面或是两面也是无关的。
现在回到图1,控制部分120最好包括控制器122和导航数据产生电路126。控制器122向导航数据产生电路126提供第一输入信号,伺服系统110向导航数据产生电路126提供第二输入信号。伺服系统可认为是控制部分120的一部分。导航数据产生电路126向多路复用器(MUX)154提供第一输入信号,该多路复用器形成视频/音频输入处理通道140的一部分。MUX 154的输出被输入到误差校正编码电路128。误差校正编码电路128的输出是提供到拾取器108的可记录输入信号,其将通过激光被“烧制”在盘102的螺旋轨道上。
控制器122最好还可以访问包含在轨道缓冲器172和记录缓冲器152上的数据,如图1所示。为了实现本发明,控制器122可以对存储在轨道缓冲器172和记录缓冲器152上的视频数据删除、修改和重定格式。最好提供允许控制器122控制分组数据视频编码器144和音频编码器148操作的控制和数据接口,以实现这里所述的本发明实施例。适当的软件或固件提供在存储器中,以执行由控制器122执行的传统操作。另外,根据本发明下面将要被详细描述的内容,提供具有高级功能的程序例程134用于控制控制器122。
具有观众可激活功能的控制缓冲器132指出那些当前可用的功能,即播放、记录、反转、快进、暂停/播放和停止的功能。暂停与VCR中的暂停操作相似,例如手动中断事先录制的节目的回放或中断观看节目的记录以从记录中消除广告。分离的暂停缓冲器136用于接收执行记录和回放操作期间进行暂停的命令。
视频/音频输入处理通道140是用于将例如NTSC或PAL的传统电视信号,转换为由装置100进行数字记录的如MPEG-1或MPEG-2的数字化分组数据的信号处理电路。输入通道140包括NTSC解码器142和如MPEG-1或MPEG-2的用于视频输入的视频编码器144,还包括音频模数转换器(A/D)146和如MPEG-1或MPEG-2的音频编码器148。数字化信号在多路复用器150中被组合并存储在记录缓冲器152中直到整个分组数据构成为止。当每个分组数据构成时,每个分组数据与MUX 154内的导航数据产生电路的输出相结合并被送到误差校正编码电路128。误差校正编码电路128可以认为是输入通道140的一部分。
输出处理通道170包括轨道缓冲器,或输出缓冲器172,在其中,从盘上读出的数据被组装成分组数据以进行进一步的处理。分组由条件访问电路174进行处理,条件访问电路174控制分组从多路信号分离器176传送并将其输入各个通道用于视频和音频处理。视频通过解码器178从如MPEG-1或MPEG-2被解码,并作为传统电视信号如NTSC或PAL被编码。音频通过电路182从如MPEG-1或MPEG-2被解码,并作通过音频数模(D/A)转换器184转换为模拟形式。应当知道,输出处理通道170可以被认为是包括误差校正电路130的。
装置100表现为具有如1X读出和1X写入能力的装置。这些装置典型的具有用于记录或回放大约11兆比特/秒的最大数据传输速率。为了执行操作,本发明的一些装置对以同时发生的方式进行的回放(读取)和记录(写入)是必要的。很显然,在该装置中同时发生回放和记录似乎是不可能的,但是即使是这种最小可能性,根据本发明的装置也可以有效操作,以提供明显同时地回放和记录,以及其他的创造性装置。本发明的装置还对具有高数据传输速率的装置很有用。
DVD介质
为了说明本发明的装置,节目素材可以被记录在可记录的DVD介质上,例如图1的可重写的DVD,并从可重写的DVD介质上回放。更详细的细节如图2所示,可重写的DVD 102可以包括两个基底,该基底通过粘合层粘合到一起,形成1.2mm厚的盘。中心孔218形成在盘的中心,以使图1所示的马达106的夹紧装置可以牢固的抓紧盘,并根据本发明控制其角度转动。
与在传统的DVD-RAM技术中相同,本发明的可重写的DVD102由纹脊/纹槽结构和相变材料构成,以将数据记录在盘上。纹脊/纹槽组合形成连续的螺旋112,其具有交替记录在纹脊和纹槽上的数据。数据可以沿螺旋112向外写在可重写的DVD 102上,其开始于螺旋的较小半径部分向螺旋112的较大半径部分写入。几个连续的三个大圆点(___)系列代表图中未示出的螺旋的部分。螺旋112的每个近乎圆形的放射状的同心圆部分有时被称为轨道。特别地,螺旋112可以形成有侧对侧的摆动(wobble),图中未示出,以容纳介质类型索引。由于尺寸所限仅示出螺旋16的部分大小,其在所示中被放大。
为了保持穿越可重写的DVD 102的表面上的恒定数据密度,记录表面被分为24个环形区。每个环形区具有1888条轨道,包括944个纹脊轨道和944个纹槽轨道。每条轨道被分为扇区114(为了简单只示出单个扇区)。最内侧扇区具有每道17扇区。每道扇区的数量在每个随后的区中递增一个。由此,最外侧扇区包括每道40个扇区。每个扇区114开始于只读识别段,其凸出在盘表面上。该已知为标题的识别段用于识别扇区的物理位置并保持与用户可记录数据段相分离,以保证永久可读取。可重写的DVD 102可以进一步包括凸出区域116,其包括只读数据,该只读数据可以识别介质的种类,如DVD-RAM,DVD-ROM,或DVD-R。
这里所示的高级功能适用于其他种类的盘形介质和盘形介质播放器和记录器。另外,图1中所示的装置的各种修改和图2中盘形介质的各种修改可以结合起来使用以实现根据本发明的高级功能。特别地,这里所描述的用于DVD记录器的这些混合功能可以包括对用于记录数据到可记录的DVD介质上的控制器122内的硬件、固件和软件的改进和添加。
用于DVD记录器的混合功能
DVD消隐和混合可以用在具有处理DVD-RW、DVD-RAM、DVD+RW等的功能的DVD记录器中。特别地,混合和消隐功能使得消费者制作高质量的家庭视频效果,其以前只能使用制造者水平的专业记录设备而获得。在本发明中,可以改变或不改变DVD比特流执行视频混合。在使用改变的DVD比特流的以前的技术可以在当前的DVD播放器中被执行。在使用未改变的DVD比特流的后来的技术不能在当前的DVD播放器被执行。这里所述的本发明包括用于使用这些技术的每一个进行混合操作的方法。
通常,混合包括几种已知的特技效果中的一种,这些特技效果在节目视频转换时特别有用。例如,特技效果可以用在视频显示的开始(例如,当从标题屏面转换到视频节目时)、视频显示的结束(例如,当从显示转换到片头字幕列表时)或在显示期间(例如,当从一段转换到另一段时)。不同类型的混合效果可以依靠混合效果使用时的情况而理想化。例如,混合可以包括静止画面渐隐的同时视频渐显、视频渐隐的同时静止画面渐显或视频渐隐的同时其他视频渐显。本发明涉及各种用于执行每一个前述类型的效果的技术。
静止画面渐隐同时视频渐显
图3是根据本发明的用于执行静止画面渐隐同时视频渐显的系统300的方框图。特别地,图3中的系统300可以包括用于存储静止图像的图像缓冲器304和前面与图1相关地描述的分组视频解码器178。然而,不象图1中举例说明的简单地提供分组视频解码器178的输出到TV编码器180,而是解码输出能与混合器块302通信,如图3所示。混合器块302可以执行从分组视频解码器178得到的解码视频和存储在图像缓冲器304内的静止图像的视频混合。
视频混合块302可以是用于混合视频信号的公知装置的任何变形。特别地,混合块302可以是传统的视频混合器,其可以在本领域技术人员公知的硬件、软件或他们的组合内被执行。例如混合器可以是线性类型混合器,其将分离的解码MPEG视频(数字或模拟)组合以形成单一的组合的图像。然而,混合器并不仅局限于这些考虑,其他适合类型的视频混合器都可以用于上述目的。
在图3中所示的操作中,混合功能刚一激活,在前一视频块或片内的上一次的画面就可以在分组视频解码器178内被解码并存储到图像缓冲器304中。然后,包含在随后的视频块或片内的视频数据可以在分组视频解码器178内被解码并直接提供到混合块302。混合块302可以按惯例将静止图像缓冲器304内的静止图像与最初几个由分组视频解码器178直接提供的画面中的单个画面相混合。开始,当将静止图像与单个画面相混合时,混合块可以与单个画面相比而不成比例地加权静止图像。然而,每个接下来的将静止图像与随后的单个画面混合期间,静止图像的加权可以随单个画面的加权的增加成比例地递减,直到单个画面与静止图像相比而不成比例地被加权为止。
对于静止画面与单个画面的每个混合,都可以通过对每个静止画面和单个画面使用混合系数来执行上述加权操作。从而,混合画面Pn可以依据下述规律形成:
Pm=Kn*PIB+(1-Kn)*Pnin 当n<=N
Pn=Pnin 当n>N其中Pn是从混合块302得到的混合画面输出;PIB是从图像缓冲器得到的画面;Pnin是从分组视频解码器178得到的由混合器接收的第n个输入画面;和Kn是n的函数。如上述规律所述,Kn充当用于决定混和画面输出Pn内的图像PIB和Pnin的相对强度的混合系数。
特别地,不管静止画面和消隐的视频图像是前进帧还是非前进帧,本发明都可以以同样有效的方式执行。特别地,如果静止画面不是前进帧,并且消隐视频画面不是前进帧,那么,静止画面将为场画面(field picture)。如果接下来的画面是前进帧,那么,静止画面将是具有两个相同的场的帧。如果静止画面是前进帧,那么,它将与渐显的视频图像的相同的奇偶性的场相混合。
一旦产生,混合图像Pn可以被提供到显示缓冲器306和直接提供到TV编码器180,如图1所示。一旦N个画面被处理,静止画面将被完全渐隐,同样,数值Kn与数值1-Kn相比不成比例地变小。因此,视频将完全渐显。特别地,由于混合在从可记录的介质102读取的视频信号的MPEG解码和后处理之后的未压缩区域中执行,因此,压缩的DVD比特流保持不变。重要地,数值N可以根据需要的消隐时间和目标信号格式而确定。例如,如果希望的消隐时间是2秒,目标信号格式是NTSC,那么,N=30帧/秒×2秒=60帧。
图3示出了用于所述消隐功能的一个可能的实现。然而,很显然本发明并不局限于这一点。例如,消隐还可以通过混合静止画面和视频,以及再编码合成画面而获得。那样的话,代替图1中所示的将合成信号提供给TV编码器180,混合块302可以将合成信号提供给用于对MPEG格式的合成画面再编码的分组或MPEG视频编码器。
视频渐隐同时其他视频渐显
为了创造第一视频渐隐同时其他视频渐显的混合效果,通常有必要同时向传统的混合器提供两个视频信号。现在,分组视频解码器不能同时解码两个视频比特流。然而,两个视频比特流的一些段可以被再编码以获得视频消隐。假设两个视频比特流记录在DVD上,两个视频比特流存储在两个相邻的片内或存储在同一片内,根据本发明,该两个视频比特流可以被解码、混合和再编码。当两个视频比特流混合时,显示时间将短于两个视频比特流的显示时间的总和。最终结果使得再编码视频比特流在总比特量上小于原始两个视频比特流的总和。
图4是用于渐隐一个视频比特流的同时渐显其他视频比特流的系统400的方框图。当从单独的可记录介质如图1中所示的可重写的盘102上读取两个视频比特流410、420时,如图4所示的系统400可用于执行同时的渐显和渐隐。特别地,从第一视频比特流410和第二视频比特流420得到的单帧交替地被解码并提供到混合块402。但是从第一视频比特流410得到的每帧可以被延迟,以使从第一视频比特流410得到的帧可以与从第二视频比特流420得到的帧同时导入混合块402。与如图3所示的混合块302相同,图4所示的混合块402可以混合根据混合系数Kn加权的两帧。然后,由混合块402产生的合成画面被提供到编码缓冲器406,编码器408如MPEG编码器可以从编码缓冲器406再编码合成帧。特别地,再编码合成帧可以写入可重写的盘。然而,本发明并不局限于此种混合帧的使用。相反地,在本发明的其他方面,混合帧可以被提供到显示缓冲器,用于最终显示在视频显示终端或电视机上。
如图4所示,两个分离的视频比特流410、420可以提供到系统400。开关s1和开关s2可以协同切换以将视频比特流410、420交替提供到如图1中所示的分组视频解码器178的分组视频解码器。当第二视频比特流420可在分组视频解码器178中被解码并提供到混合块402中时,第一视频比特流410可以提供到延迟块403。在将第一视频比特流410的帧提供给混合块402之前,在将来自第二视频比特流420的帧提供到混合块402中的同时,延迟块403保持第一视频比特流410的帧以一段延迟时间。在本发明的一个方面,延迟时间可以对应于帧周期。
如图3中所示的情况,图4中的混合块402可以按惯例将第一视频比特流410的帧与第二视频比特流420的帧相混合。开始,当将第一视频比特流410的延迟的帧与第二视频比特流的帧相混合时,混合块402可以与第二视频比特流402的帧相比不成比例地加权第一视频比特流410的延迟的帧。然而,每个随后的将第一视频比特流410的延迟的帧与第二视频比特流420的帧的混合期间,第一视频比特流410的延迟的帧的加权可以随第二视频比特流420的帧的加权的增加而成比例地减少,直到第二视频比特流420的帧与延迟的帧相比不成比例地被加权。从而,产生了第一视频比特流渐隐而第二视频比特流渐显的混合效果。
Claims (11)
1.一种用于在可记录的DVD播放器中提供混合效果的方法,包括:
(a)从DVD内各视频片中检索第一和第二视频比特流帧,并在分组视频解码器内解码所述第一和第二视频比特流帧;
(b)将所述第一和第二解码视频比特流帧提供到混合器;
(c)加权所述第一和第二解码视频比特流帧,其中,所述第一解码视频比特流帧根据加权系数Kn加权,所述第二解码视频比特流帧根据加权系数(1-Kn)加权;
(d)所述加权视频比特流帧在所述混合器中混合,所述混合形成合成视频比特流帧;和,
(e)重复步骤(a)-(d),以形成连续的第一和第二解码视频比特流帧对,其中,所述加权系数Kn的数值相对于每个所述连续的视频比特流帧对增加。
2.根据权利要求1所述的方法,其中,所述提供步骤包括:
在静止图像缓冲器内存储所述第一解码视频比特流帧;和,
将所述静止图像缓冲器内的所述第一解码视频比特流帧和所述第二解码视频比特流帧提供到所述混合器;
3.根据权利要求1所述的方法,其中,所述读取和解码步骤包括:
交替读取和解码所述第一视频比特流内的帧和所述第二视频比特流内的帧;
4.根据权利要求3所述的方法,其中,所述提供步骤包括:
延迟所述将从所述第一视频比特流帧得到的所述解码帧提供到所述混合器;和,
同时将从所述第二视频比特流得到的所述解码帧和从所述第一视频比特流得到所述延迟的解码帧提供到所述混合器;
其中,所述连续的第一和第二解码视频比特流帧对包括从所述第一解码视频比特流得到的连续延迟的帧和从所述第二视频比特流得到的连续解码的帧。
5.根据权利要求2所述的方法,进一步包括:
将所述合成视频比特流帧提供到电视显示器。
6.根据权利要求2所述的方法,进一步包括:
将所述合成视频比特流帧存储于显示缓冲器内。
7.根据权利要求4所述的方法,进一步包括:
再编码所述合成视频比特流帧。
8.根据权利要求7所述的方法,其中,所述再编码步骤包括:
MPEG编码所述合成视频比特流帧。
9.一种混合系统,包括:
分组视频解码器,用于解码从DVD的各视频片检索得到的第一和第二视频比特流帧;
加权系统,用于加权所述分组视频解码器内解码的所述第一和第二视频比特流帧,其中,所述第一解码视频比特流帧根据加权系数Kn加权,所述第二解码视频比特流帧根据加权系数(1-Kn)加权;和,
混合器,用于同时混合所述加权视频比特流帧,所述混和形成合成的视频比特流帧。
10.根据权利要求9所述的系统,进一步包括:
用于存储所述第一解码视频比特流帧的静止图像缓冲器,所述静止图像缓冲器同时提供所述第一解码视频比特流帧和所述第二解码视频比特流帧。
11.根据权利要求9所述的系统,进一步包括:
用于延迟所述第一解码视频比特流帧到所述混合器中的传送的延迟块,所述混合器接收所述第二解码视频比特流帧,以同时混合接收的所述延迟的第一解码视频比特流帧。
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