CN1262578A - 通过字母框法对mpeg图象作16∶9宽高比变换 - Google Patents

通过字母框法对mpeg图象作16∶9宽高比变换 Download PDF

Info

Publication number
CN1262578A
CN1262578A CN00100470A CN00100470A CN1262578A CN 1262578 A CN1262578 A CN 1262578A CN 00100470 A CN00100470 A CN 00100470A CN 00100470 A CN00100470 A CN 00100470A CN 1262578 A CN1262578 A CN 1262578A
Authority
CN
China
Prior art keywords
image
grappling
memory
data
decoder
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.)
Granted
Application number
CN00100470A
Other languages
English (en)
Other versions
CN1164078C (zh
Inventor
王金保
坎达丝·安德森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Mobility LLC
Original Assignee
General Instrument Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Instrument Corp filed Critical General Instrument Corp
Publication of CN1262578A publication Critical patent/CN1262578A/zh
Application granted granted Critical
Publication of CN1164078C publication Critical patent/CN1164078C/zh
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/01Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117Conversion 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
    • H04N7/0122Conversion 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 the input and the output signals having different aspect ratios
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134Methods 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
    • H04N19/157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134Methods 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
    • H04N19/157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
    • H04N19/159Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169Methods 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
    • H04N19/17Methods 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
    • H04N19/172Methods 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H04N19/423Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H04N19/423Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
    • H04N19/426Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements using memory downsizing methods
    • H04N19/427Display on the fly, e.g. simultaneous writing to and reading from decoding memory
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/44Processing 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
    • H04N21/4402Processing 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 reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440263Processing 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 reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
    • H04N21/440272Processing 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 reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA for performing aspect ratio conversion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/426Internal components of the client ; Characteristics thereof
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S348/00Television
    • Y10S348/913Letterbox, e.g. display 16:9 aspect ratio image on 4:3 screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Systems (AREA)

Abstract

在译码器中依靠行消除来将数字视频图象变换到较高宽高比格式的方法和设备。例如,可实现由4∶3到16∶9字母框格式的变换。对非锚定图形(如B-图形)的行消除在存储进存储器之前于译码器的译码侧发生。对锚定图形(如I-和P-图形)的行消除在由存储器检索之后和显示之前于译码器的显示侧发生。额外的存储器空间可被释放用于存储额外的译码数据,从而补偿用此字母框格式处理的有效视频行数减少所造成的显示处理时间的降低。

Description

通过字母框法对MPEG图象作16∶9宽高比变换
本发明是关于译码器中依靠行消除将数字视频图象变换到较高宽高比格式的方法和设备。本发明特别适用于符合MPEG-2标准的数字视频数据。
通过宽带通信系统如有线电视或卫星电视网络传输数字视频数据日益普及。用户家中设置数字译码器,例如机顶盒,用于接收数字视频信号和处理具有适宜于在电视、视频显示终端等上显示的格式处理信号。但是,这样的机顶盒的处理和存储器求很关键而必须尽可能保证很低以便能维持网络的商业实用性。
实际上,在许多情况下希望在译码器中提供能将具有用于惯常电视屏幕尺寸例如4∶3的宽高比的数字视频图象变换到较大的宽高比如16∶9的能力。16∶9宽高比普通用于摄制准备在电影院中的屏幕上放映的影片。这一宽高比使得图象中能有更大的水平运动范围。
但4∶3宽高比通行于现有的电视传输标准、包括PAL(相位逐行交变)制式和NTSC(国家电视制式委员会)制中的电视屏幕设计和帧格式。相应地,在电视屏幕上以16∶9格式显示惯常的NTSC或PAL信号,图象将显现为在有效视频行的上下带有黑色区域。
而且,数字视频信号例如符号MPEG-2标准的信号的压缩需要利用外存储器例如动态随机存取存储器(DRAM)来对不同类图形(如I-、P-和B-图形)提供帧缓存器和提供视频缓冲器校对机(VBV)缓存器。此缓存器配置通常被优化用于处理主层次要求的MPEG-2主协议。MPEG-2标准还要求VBV缓存器至少为1.75M位。在这些局限和当前的视频解压缩处理器中现有的存储器配置的情况下,没有另外的存储器空间或存储器带宽可用来支持在译码器上由字母框作16∶9宽高的变换。
相应地即希望提供在译码器作数字视频图象的宽高比变换而无需额外的存储器空间或存储器带宽的系统。此系统应与包括MPEG-2的现有数字视频标准和包括PAL和NTSC的现有电视传输格式相兼容。
在一具体实施方案中,此系统将提供用于将4∶3宽高比图象变换到16∶9宽高比图象而仅仅采用一运行于27MHz(以32-位数据总线)的16M位EDO DRAM,或一运行于54MHz(以16-位数据总线)的SDRAM的体系结构和方法。但在需要时此系统也提供到更大宽高比的变换。
此系统与场模式(例如隔行扫描)和帧模式(例如逐行扫描)视频双方兼容。
本发明提供具有上述以及其他优点的系统。
本发明涉及在译码器上通过作行消除来将数字视频图象变换到较高宽高比格式的方法和设备。
按照本发明,对非锚定图形的行消除在存储进存储器之前于译码器的译码侧发生,而对锚定图形的行消除则在被由存储器检索之后和显示前在译码器的显示侧发生。因此本发明能提供宽高比变换能力而无需因由字母框宽高比变换所引起的译码时间与显示时间之间的延迟的增加而要求的额外的存储器空间或带宽。这种被增大的延迟是由显示处理时间降低所促成的,因为必须处理的有效视行数随字母框格式减少。因此必须释放额外的存储器空间来存放额外的译码数据以避免在运行中的数据显示。本发明实现这一目的。
改变其中每个图象具有数个视频行的数字视频图象的宽高比的详细方法包括(a)确定在译码器所接收的数字视频图象的图形类型的步骤,这里图形典型为锚定图象(anchor image)如I-或P-图形,或者为非锚定图象如B-图形。在步骤(b),在将相关数据存放在存储器之前由非锚定图象消除的行数。在步骤(c)将与锚定图象相关的数据存放在存储器,例如不作行消除。
在步骤(d),由存储器检索与非锚定图象相关的数据以输出到显示功能部件,不再作行消除。在步骤(e),由存储器检索与锚定图象相关的数据,和在输出到显示功能部件之前消除行。
这样,完全的锚定图形数据被存储在存储器中供解压缩随后的和先前的予测编码图象中应用。但本发明利用这样的事实,即不必存储完全的非锚定图形数据,从而为适应字母框宽高比变换而可释放额外的存储器空间。
数字视频图象在译码器中可通过一宽带通信网接收。
在上述的行消除处理期间,步骤(b)中由非锚定图象消除每个第n行,而在步骤(e)中每个第n行由锚定图象中消除。例如,为作由4∶3到16∶9的宽高比变换,每个第四行被消除。
提出了相应的设备。
对所列附图的简要说明:
图1描述按照本发明的译码器;
图2描述按照本发明的I-图形或P-图形的处理;和
图3描述按照本发明的B-图形的处理。
本发明关于在译码器中通过行消除来将数字视频图象变换到较高宽高比格式的方法和设备。
如所提到的,MPEG-2视频解压缩要求利用外部存储器例如DRAM用于帧缓存器和压缩视频流缓存器(VBV缓存器)。例如,可能采用一运行于27MHz的16M位EDO DRAM。而且可采用如授与C.Hoogonboom和B.Vuong的US专利5675387“视频解压缩处理器中有效地寻址DRAM的方法和设备”所介绍的帧缓存器配置。这里描述的缓存器配置被优化用于处理主层次需求中的MPEG-2主协议。在所揭示的方案中,借助减少必须寻址的DRAM不同行的次数以便检索重构一当前视频帧所需的先前视频帧象素数据来改善译码效率。
众所周知,I-图形是指能不涉及其他图形被加以译码的内编码图形,P-图形是指能利用先前译码的I-或P-图形加以译码的前向予测图形,和B-图形是指能利用先前的和下一个I-或P-译码图形加以译码的双向予测图形。因此I-和P-图形是锚定图形,因为它们可被用作为予测另一图形的基准。此外,I-、P-或B-图形均可包括一完整的帧,或者仅仅包括帧的一部分。例如,由MPEG-4标准所知的视频目标平面为任意成形的图象。
这里所用的术语“锚定图象”是指可被用于予测另一图象的任何图象(例如I-和P-图形),而术语“非锚定图象”则被用于指不能用来予测另外的图象的任何图象(如B-图形)。一锚定图象实际上不一定被用于予测其他图象。另外,术语“图象”用来包括连续扫描数据序列的帧、隔行扫描数据序列的场、和任意的以及矩形的或者对称的图象。
对于译码16∶9宽高比的、或字母框的图象,由于在有效视频上下显示的黑色区域所引起的较小显示图象,其显示处理较之对标准4∶3宽高比图象的处理约快25%。这是一个问题,因为对B-图形的显示时间典型地约为由其被译码的时间起半帧的时间。而且译码与显示之间更长的延迟需要更大的B-图形缓存器用于显示前存储译码象素数据。但如已提到的,采用惯常的译码器存储器结构,不可能有适应这种需求的额外存储器空间。另外,增加额外存储器的成本也是问题,特别是对于必须以最低可能成本生产的批量生产的译码器/机顶盒。
这样,如果期望无需额外的B-图象缓存器空间地作16∶9宽高比变换,能发生在运行中的显示,此时可能对观察者显示不希望的出错图象。
对于PAL制式视频数据,视频解压缩处理器(VDP)将大约一半的B-图形装进缓存。这是由于MPEG-2需求1.75M位VBV缓存器。
按照本发明,借助在译码器的译码侧对非锚定图形(B-图形)作行消除,可实现16∶9字母框模式而无需额外存储器空间和带宽的开销。对于锚定图形(I-和P-图形),在译码器的显示侧发生行消除,行消除也被称之为由十中取一进行调整。
图1描述一按照本发明的译码器。译码器100包括一由信道例如由电缆或卫星宽带通信网络接收压缩数字视频位流的解压缩引擎110。解压缩引擎110执行通常的解压缩功能,根据需要包括有变长译码、逆量化、逆空间变换、和运动补偿与估算处理。
对于予测编码(如帧内编码)图形,例如P-和B-图形,解压缩引擎110通过线路115由存储器150检索先前的和/或未来的图象数据。存储器150可以是一带有用于提供I-图形缓存器152、P-图形缓存器154、B-图形缓存器156、和VBV缓存器158而被分配的存储器空间的16M位SDRAM或EDO。解压缩引擎110将经解压缩的当前图形数据提供给图形类型读取器122,和提供到开关146。
图形类型读取器122通过读取当前图形数据的适当前标信息来确定当前图形(如帧)的图形类型,并将此图形类型信息提供给控制器140。控制器140可包括有用于接收和处理图形类型信息的微处理器或其他硬件、固件、和/或元件部件。
如果当前图形为一锚定图形,例如I-或P-图形,控制器140发送信号促使开关146将当前图形数据的路由定为通过线路122直接到达存储器150,傍路掉译码侧行消除器120。但如果当前图形为非锚定图形,如B-图形,控制器140发送信号促使开关146将当前图形数据的路由定为到达行消除器120。行消除器120可包括有能检测和计数每一行的当前图象数据的行计数器功能部件。行消除器120在将数据输出到存储器150之前消除当前的图象数据的每个第n行。为由4∶3宽高比变换到16∶9宽高比,每个第四行被消除(因为1-4/3/16/9=1/4)。
控制器140可响应例如用户通过手持遥控器之类提供的选择信号,或者它响应数据流中载有的指示应采用不同宽高比进行显示的数据。
按照本发明,B-图形数据不被解压缩引擎110用于予测,因此不必在存储器150中存储完全的B-图形图象。但解压缩引擎110作予测时可能需要P-和I-图形数据,因此这一数据被完全地存储在存储器150中。
例如,对于原始分辨率为720象素×480行的NTSC图象,消除每个第四行的行消除将导致所显示的图象具有360行。类似地,对于720象素×576行的PAL图象,消除每个第四行的行消除将导致所显示图象具有432行。黑象素填充有效视频行的上、下区域。
还有,尽管已讨论了由4∶3宽高比到16∶9宽高比的图象变换,而本发明也可通过消除更少或更多的视频行来提供其他的变换格式。
在译码器100的译码侧,存储在存储器150中的数据输出到显示功能部件180来提供适用于在电视或其他装置上显示的数据。显示功能部件180按照已知方式例如按照CCIR标准格式化该数据以便显示。具体地说,输出数据的图形类型由与控制器140通信的图形类型读取器172确定。图形类型读取器122与172可共用公共组件而不一定是独立的,但如果希望的话可以是独立的。
可任选地,各图形的图形类型仅仅需要在存储进存储器之前依靠利用一适用的定时方案作存储器150的输出与输入图形定时的相关处理来确定一次。例如,可在译码器100的译码侧对各图形读取各图形的呈现时间标记(PTS)和图形类型,并将其存在控制器140。与控制器140的相联系的时钟和存储器可在显示侧将由存储器150输出的图形数据的图形类型与先前记录的信息进行相关处理。
但为作说明,图1的示例译码器100独立地确定由存储器150输出的各图形的图形类型。
如果由存储器150输出的图形输出为非锚定图形,控制器140就促使开关148和149将数据路由定为直接到达显示功能部件180,傍路掉显示侧的行消除器170。对非锚定帧数据无须作进一步的行消除,因为在译码器侧行消除器120已发生所需的行消除处理。
但如果输出图形为锚定图形,为了行消除每个第四行,控制器140则促使开关148将数据路由定为通过线路141到显示侧行消除器170。然后通过开关149将锚定图形数据提供给显示功能部件180。
应指出,图1中所示的译码器结构仅只是举例,而本发明的宽高比变换可采用各种硬件、彩色固件和/或软件配置来实现。
如果不要求作宽高比变换,则控制器140促使开关146、148、和149所有时刻均傍路行消除器120和170。
图2描述按照本发明的I-图形或P-图形的处理。为作说明,假定为一具有480行的NTSC图象,当然其他电视信号如PAL也可以应用。再有,在此例中是进行由4∶3到16∶9的宽高比变换,虽然也可采用其他的宽高比。I-图形或P-图形200的原始、完全的解压缩图象对应于图1的解压缩引擎110的输出。图象200包括有有效视频行1~480。因为尚未发生行消除,对应于图1存储器150中数据的存储图象240与完全的解压缩图象200相同。
所显示的图象280表明由图1行消除器170输出的数据,其中每个第四有效视频行已被消除。相应地,所显示图象280中只有360行,例如行1、2、3、5、6、……475、477、478和479。图象280的最后一有效视频行对应于解压缩图象200的行479。此所显示图象的有效视频行的上面和下面通常设有黑象素。
图3描述按照本发明的B-图形的处理。原始的完全的解压缩B-图形图象300含有行1~480。被存储的B-图形图象340对应于由图1行消除器120输出的数据。相应地,此图象已被消除每个第四行。被显示B-图形图象380对应于图1线路143上的数据,包括有对所讨论的NTSC视频示例的整个380行。所显示图象380中有效视频行的上、下也设置有黑象素。
因而可看出本发明提供在译码器中通过进行行消除来将数字视频图象变换到较高宽高比格式的方法和设备。对非锚定图形的行消除在存储进存储器前于译码器的译码侧发生,而对锚定图形的行消除则在由存储器检索之后和显示前在译码器的显示侧发生。
因此本发明能提供宽高比变换能力而无需由于因字母框宽高比变换所引起的译码时间与显示时间之间的延迟增大而要求的额外存储器空间或带宽。
虽然本发明是联系各种具体实施例加以说明的,但本技术领域内的熟悉人士均会理解可对之作大量的适应和修改而不背离权利要求中所述的发明精神实质和范畴。
例如,尽管本发明是连系电缆或卫星电视宽带通信网络进行讨论的,但将会理解其他网络诸如局域网(LAN)、都市区域网(MAN)、广域网(WAN)、中间网络、企业内部网络和互联网均可采用。
另外,本发明还可适配用于除MPEG-2外的数字视频标准和除NTSC及PAL外的电视标准。

Claims (16)

1、一种用于改变包含多个视频行的数字视频图象的宽高比的方法,包括步骤:
(a)确定在译码器中接收的连续数字视频图象的对应图形类型,所述图形类型包括有锚定图象和非锚定图象;
(b)在将与非锚定图象相关的数据存贮进存储器之前从非锚定图象消除行;
(c)存储与锚定图象相关的数据进存储器;
(d)由存储器检索与非锚定图象相关数据以输出到显示功能部件;和
(e)由存储器检索与锚定图象相关的数据和在输出到显示功能部件前对之作消除行处理。
2、权利要求1所述方法,其特征是:
与锚定图象相关的数据在所述步骤(c)被存进存储器,而不对之作消除行处理。
3、权利要求1或2所述方法,其特征是:
在所述步骤(d)由存储器检索与非锚定图象相关的数据,不对之作进一步的行消除处理。
4、前述权利要求之一所述方法,其特征是:
所述连续数字视频图象在译码器中通过宽带通信网络接收。
5、前述权利要求之一所述方法,其特征是:
在译码器中所接收的所述连续数字视频图象具有4∶3的宽高比;和
输出到显示功能部件的数据具有16∶9的宽高比。
6、前述权利要求之一所述方法,其特征是:
在所述步骤(b)由非锚定图象消除每个第n行;和
在所述步骤(e)由锚定图象消除每个第n行。
7、前述权利要求之一所述方法,其特征是:
所述非锚定图象包括双向予测图象。
8、前述权利要求之一所述方法,其特征是:
所述锚定图象包括(i)内部编码图象和(ii)前向予测图象中至少一个。
9、一种用于改变包含多个视频行的数字视频图象的宽高比的设备,包括:
用于确定在译码器接收的连续数字视频图象的对应图形类型的图形类型读取器;
所述图形类型包括有锚定图象和非锚定图象;
用于在将与非锚定图象相关的数据存储进存储器之前由非锚定图象消除行的译码侧行消除器;
用于将与锚定图象相关的数据存储进存储器的装置;
用于由存储器检索与非锚定图象相关的数据以输出到显示功能部件的装置;和
用于由存储器检索与锚定图象相关数据的装置,和用于在输出到显示功能部件前对之消除行的显示侧行消除器。
10、权利要求9所述设备,其特征是:
与锚定图象相关的数据被存储在存储器中而不对之作消除行处理。
11、权利要求9或1O所述设备,其特征是:
与非锚定图象相关的数据被由存储器中检索而不对之再消除任何行。
12、权利要求9至11之一所述设备,其特征是:
所述连续数字视频图象在译码器中通过宽带通信网被接收。
13、权利要求9至12之一所述设备,其特征是:
在译码器中接收的所述连续数字视频图象具有4∶3的宽高比;和
输出到显示功能部件的数据具有16∶9的宽高比。
14、权利要求9至13所述设备,其特征是:
所述译码侧行消除器从非锚定图象消除每个第n行;和
所述显示侧行消除器从锚定图象消除每个第n行。
15、权利要求9至14之一所述设备,其特征是:
所述非锚定图象包括双向予侧图象。
16、权利要求9至15之一所述设备,其特征是:
所述锚定图象包括(i)内部编码图象和(ii)前向予测图象中至少一个。
CNB001004700A 1999-01-27 2000-01-27 通过字母框法对mpeg图象作16∶9宽高比变换 Expired - Lifetime CN1164078C (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/238,958 US6115072A (en) 1999-01-27 1999-01-27 16:9 aspect ratio conversion by letterbox method for an MPEG image
US09/238,958 1999-01-27
US09/238958 1999-01-27

Publications (2)

Publication Number Publication Date
CN1262578A true CN1262578A (zh) 2000-08-09
CN1164078C CN1164078C (zh) 2004-08-25

Family

ID=22900037

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB001004700A Expired - Lifetime CN1164078C (zh) 1999-01-27 2000-01-27 通过字母框法对mpeg图象作16∶9宽高比变换

Country Status (3)

Country Link
US (1) US6115072A (zh)
EP (1) EP1026884A3 (zh)
CN (1) CN1164078C (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1871854B (zh) * 2003-09-05 2012-07-04 康奈克森特系统公司 具有压缩图像与视频的低启动时延的假想参考解码器
CN103096091A (zh) * 2005-09-27 2013-05-08 高通股份有限公司 用于过渡效果的多媒体编码技术
CN104429084A (zh) * 2012-07-09 2015-03-18 高通股份有限公司 包含固定长度译码的视频参数集id(vps_id)的sei消息

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9716293D0 (en) * 1997-07-31 1997-10-08 Lsi Logic Corp Method and apparatus for decoding video data
EP0913993A1 (en) * 1997-10-28 1999-05-06 Deutsche Thomson-Brandt Gmbh Method and apparatus for automatic format detection in digital video picture
CN1183778C (zh) * 1998-02-13 2005-01-05 松下电器产业株式会社 图象解码装置及记录媒体
JP4345937B2 (ja) * 1998-11-10 2009-10-14 キヤノン株式会社 画像拡大処理回路
US6411334B1 (en) * 1999-03-05 2002-06-25 Teralogic, Inc. Aspect ratio correction using digital filtering
KR100323678B1 (ko) * 2000-02-28 2002-02-07 구자홍 화면비 변환 장치
US6965641B1 (en) * 2000-03-02 2005-11-15 Sun Microsystems, Inc. Apparatus and method for scalable buffering in a digital video decoder
JP4144193B2 (ja) * 2000-10-25 2008-09-03 ソニー株式会社 表示パネル、及びディスプレイ装置
US6983017B2 (en) 2001-08-20 2006-01-03 Broadcom Corporation Method and apparatus for implementing reduced memory mode for high-definition television
PL367241A1 (en) 2001-11-30 2005-02-21 Matsushita Electric Industrial Co, Ltd. A method and an apparatus for stream conversion, a method and an apparatus for data recording, and data recording medium
WO2004006446A2 (en) * 2002-07-02 2004-01-15 Conexant Systems, Inc. Hypothetical reference decoder for compressed image and video
EP1408684A1 (fr) * 2002-10-03 2004-04-14 STMicroelectronics S.A. Procédé et système d'affichage video avec recadrage automatique
US7802288B2 (en) * 2003-03-14 2010-09-21 Starz Entertainment, Llc Video aspect ratio manipulation
EP1714477A1 (en) * 2004-02-03 2006-10-25 Koninklijke Philips Electronics N.V. Changing the aspect ratio of images to be displayed on a screen
US8878996B2 (en) * 2009-12-11 2014-11-04 Motorola Mobility Llc Selective decoding of an input stream
US8645353B2 (en) * 2011-06-23 2014-02-04 Microsoft Corporation Anchor image identification for vertical video search
US8645354B2 (en) 2011-06-23 2014-02-04 Microsoft Corporation Scalable metadata extraction for video search

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924522A (en) * 1987-08-26 1990-05-08 Ncr Corporation Method and apparatus for displaying a high resolution image on a low resolution CRT
JPH01292984A (ja) * 1988-05-20 1989-11-27 Sony Corp 映像信号の方式変換装置
KR970006477B1 (ko) * 1992-09-07 1997-04-28 가부시기가이샤 도시바 텔레비젼 신호 처리 장치
JP3374989B2 (ja) * 1993-03-26 2003-02-10 ソニー株式会社 画像信号符号化方法および画像信号符号化装置、ならびに画像信号復号化方法および画像信号復号化装置
JP3231142B2 (ja) * 1993-06-18 2001-11-19 株式会社日立製作所 映像圧縮拡大回路及び装置
TW245871B (en) * 1994-08-15 1995-04-21 Gen Instrument Corp Method and apparatus for efficient addressing of dram in a video decompression processor
GB9504307D0 (en) * 1995-03-03 1995-04-19 Philips Electronics Uk Ltd Video image processing
US5638130A (en) * 1995-05-25 1997-06-10 International Business Machines Corporation Display system with switchable aspect ratio
KR100194922B1 (ko) * 1996-04-29 1999-06-15 윤종용 화면비 변환장치
US5825424A (en) * 1996-06-19 1998-10-20 Thomson Consumer Electronics, Inc. MPEG system which decompresses and recompresses image data before storing image data in a memory and in accordance with a resolution of a display device
JPH1079941A (ja) * 1996-09-05 1998-03-24 Fujitsu Ltd 画像処理装置
US5926613A (en) * 1996-09-27 1999-07-20 Sony Corporation Method and apparatus for encoding pan-edit vectors for film to tape transfer
JP3742167B2 (ja) * 1996-12-18 2006-02-01 株式会社東芝 画像表示制御装置
KR19980068686A (ko) * 1997-02-22 1998-10-26 구자홍 엠펙 디코더(MPEG Decoder)의 레터 박스(Letter Box) 처리방법
US5862268A (en) * 1997-03-24 1999-01-19 Focus Enhancements, Inc. Bilinear decimator with error compensation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1871854B (zh) * 2003-09-05 2012-07-04 康奈克森特系统公司 具有压缩图像与视频的低启动时延的假想参考解码器
CN103096091A (zh) * 2005-09-27 2013-05-08 高通股份有限公司 用于过渡效果的多媒体编码技术
CN104429084A (zh) * 2012-07-09 2015-03-18 高通股份有限公司 包含固定长度译码的视频参数集id(vps_id)的sei消息

Also Published As

Publication number Publication date
EP1026884A2 (en) 2000-08-09
EP1026884A3 (en) 2003-06-25
CN1164078C (zh) 2004-08-25
US6115072A (en) 2000-09-05

Similar Documents

Publication Publication Date Title
CN1164078C (zh) 通过字母框法对mpeg图象作16∶9宽高比变换
US6072548A (en) Video decoder dynamic memory allocation system and method allowing variable decoded image size
CN1110965C (zh) 视频解压缩处理器中存储器的定址方法及装置
CN1048135C (zh) 数字变换压缩的视频数据的低分辨率解压缩设备
EP1374593B1 (en) Adaptive bandwidth system and method for video transmission
US5818533A (en) Method and apparatus for decoding B frames in video codecs with minimal memory
KR100380709B1 (ko) 디지털비디오신장프로세서및디지털비디오신장프로세서의디램을매핑하기위한방법
US6473558B1 (en) System and method for MPEG reverse play through dynamic assignment of anchor frames
US6088047A (en) Motion compensated digital video decoding with buffered picture storage memory map
US6088391A (en) Method and apparatus for segmenting memory to reduce the memory required for bidirectionally predictive-coded frames
EP0917375A2 (en) Picture memory mapping for compression and decompression of image sequences
US5903282A (en) Video decoder dynamic memory allocation system and method with an efficient freeze mode
US5926227A (en) Video decoder dynamic memory allocation system and method with error recovery
CN1536890A (zh) 动态影像的适应性去交错方法及装置
KR20110111544A (ko) 입체적 3d-비디오 이미지 디지털 코딩 시스템 및 방법
CA2297474A1 (en) Synchronous dram bandwidth optimization for display downsizing of an mpeg-2 image
US6160847A (en) Detection mechanism for video channel underflow in MPEG-2 video decoding
US8068171B2 (en) High speed for digital video
US7970262B2 (en) Buffer descriptor structures for communication between decoder and display manager
US6940909B2 (en) Video decoding during I-frame decode at resolution change
US7447364B2 (en) Video image capturing and displaying method and system applying same
WO2000011612A1 (en) Methods and apparatus for reducing the amount of buffer memory required for decoding mpeg data and for performing scan conversion
US7068847B1 (en) High-resolution still picture decoding device
US8165196B2 (en) System, method, and apparatus for display manager
US7133046B2 (en) System, method, and apparatus for display manager

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: MOTOROLA MOBILITY LLC

Free format text: FORMER OWNER: GENERAL INSTRUMENT HOLDING CO., LTD.

Effective date: 20130917

Owner name: GENERAL INSTRUMENT HOLDING CO., LTD.

Free format text: FORMER OWNER: GENERAL INSTRUMENT CORPORATION

Effective date: 20130917

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20130917

Address after: Illinois State

Patentee after: MOTOROLA MOBILITY LLC

Address before: California, USA

Patentee before: General Instruments Holding Co.,Ltd.

Effective date of registration: 20130917

Address after: California, USA

Patentee after: General Instruments Holding Co.,Ltd.

Address before: American Pennsylvania

Patentee before: GENERAL INSTRUMENT Corp.

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20160518

Address after: California, USA

Patentee after: MOTOROLA MOBILITY LLC

Address before: Illinois State

Patentee before: MOTOROLA MOBILITY LLC

CX01 Expiry of patent term

Granted publication date: 20040825

CX01 Expiry of patent term