CN105812815B - 灵活量化 - Google Patents

灵活量化 Download PDF

Info

Publication number
CN105812815B
CN105812815B CN201610301806.3A CN201610301806A CN105812815B CN 105812815 B CN105812815 B CN 105812815B CN 201610301806 A CN201610301806 A CN 201610301806A CN 105812815 B CN105812815 B CN 105812815B
Authority
CN
China
Prior art keywords
quantization parameter
quantitative mode
quantization
digital media
bit stream
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.)
Active
Application number
CN201610301806.3A
Other languages
English (en)
Other versions
CN105812815A (zh
Inventor
C·屠
S·斯里尼瓦桑
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.)
Microsoft Technology Licensing LLC
Original Assignee
Microsoft Technology Licensing LLC
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 Microsoft Technology Licensing LLC filed Critical Microsoft Technology Licensing LLC
Publication of CN105812815A publication Critical patent/CN105812815A/zh
Application granted granted Critical
Publication of CN105812815B publication Critical patent/CN105812815B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04N19/102Methods 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
    • H04N19/124Quantisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/46Embedding additional information in the video signal during the compression process
    • 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
    • H04N19/102Methods 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
    • H04N19/124Quantisation
    • H04N19/126Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
    • 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
    • H04N19/136Incoming video signal characteristics or properties
    • 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
    • H04N19/176Methods 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 block, e.g. a macroblock
    • 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
    • H04N19/186Methods 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 colour or a chrominance component
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Color Television Systems (AREA)

Abstract

一种数字媒体编码器/解码器使用提供沿着所编码的数字媒体数据的各个维度改变量化的功能的灵活量化技术,这些维度包括空间、频率子带和色通道。该编解码器利用一信号表示方案来高效地用信号表示灵活量化组合的各种排列以用于主要使用情形。当量化器选择可用时,该编解码器通过定义一量化器子集并从该集合中索引当前量化器来高效地编码当前量化器。

Description

灵活量化
本申请是申请日为2007年5月4日,申请号为201210297902.7,名为“灵活量化”的分案申请(其为申请号为200780015871.9,国际申请号为PCT/US2007/010848,名为“灵活量化”的申请的分案申请)的分案申请。
背景
1.基于块变换的编码
变换编码是在许多音频、图像和视频压缩系统中使用的一种压缩技术。未压缩数字图像和视频通常被表示或捕捉为以二维(2D)网格排列的图像或视频帧中各位置处的图元或色彩的样本。这被称为图像或视频的空间域表示。例如,用于图像的典型格式由被排列为网格的24位彩色图元流构成。每一样本是表示诸如RGB或YIQ等色彩空间内该网格中的一个像素位置处的色彩分量的数字。各种图像和视频系统可使用各种不同的色彩、空间和时间分辨率的采样。类似地,数字音频通常被表示为时间采样的音频信号流。例如,典型的音频格式由在有规律的时间间隔处所取的16位音频信号幅度样本流构成。
未压缩数字音频、图像和视频信号可消耗大量的存储和传输能力。变换编码通过将信号的空间域表示变换成频域(或其它类似的变换域)表示,然后降低该变换域表示的某些一般较不可感知的频率分量的分辨率,减小了数字音频、图像和视频的大小。这一般与降低空间域中的图像或视频或时域中的音频的色彩或空间分辨率相比,产生了较不可感知的数字信号劣化。
更具体而言,图1所示的典型的基于块变换的编解码器100将未压缩的数字图像的像素划分成固定大小的二维块(X1,...Xn),每一块可能与其它块重叠。对每一块应用进行空间-频率分析的线性变换120-121,这将块内彼此隔开的样本转换成一般表示块间隔上相应的频带内的数字信号的强度的一组频率(或变换)系数。为了压缩,变换系数可被选择性地量化130(即,诸如通过丢弃系数值的最低有效位或将较高分辨率数字集中的值映射到较低分辨率来降低分辨率),并且还被熵或可变长度编码130成压缩的数据流。在解码时,变换系数进行反变换170-171以便几乎重构原始的色彩/空间采样图像/视频信号(重构块)。
块变换120-121可被定义为对大小为N的向量x的数学运算。最通常的是,该运算是线性乘法,从而产生变换域输出y=Mx,M是变换矩阵。当输入数据是任意长时,它被分段成大小为N的向量,并且向每一段应用块变换。出于数据压缩的目的,选择可逆块变换。换言之,矩阵M是可逆的。在多个维度中(例如,对于图像和视频),块变换通常被实现为可分操作。沿数据的每一维(即,行和列)可分地应用矩阵乘法。
对于压缩,变换系数(向量y的分量)可被选择性地量化(即,诸如通过丢弃系数值的最低有效位或将较高分辨率数字集中的值映射到较低分辨率来降低分辨率),并还可被熵或可变长度编码为压缩的数据流。
在解码器150中解码时,如图1所示,在解码器150侧应用这些操作的反过程(反量化/熵解码160和反块变换170-171)。在重构数据时,将逆矩阵M-1(反变换170-171)作为乘数应用于变换域数据。当应用于变换域数据时,反变换几乎重构原始时域或空间域数字媒体。
在许多基于块变换达到编码应用中,变换理想地是可逆的以取决于量化因子同时支持有损和无损压缩两者。如果例如没有量化(一般被表示为量化因子1),则利用可逆变换的编解码器可在解码时精确地再现输入数据。然而,这些应用中的可逆性的要求约束了对用于设计编解码器的变换的选择。
诸如MPEG和Windows Media等许多图像和视频压缩系统利用基于离散余弦变换(DCT)的变换。已知DCT具有得到近乎最优的数据压缩的良好能量压缩特性。在这些压缩系统中,在压缩系统的编码器和解码器两者中的重构环路中采用了反DCT(IDCT)来重构各个图像块。
2.量化
根据一个可能的定义,量化是用于通常用于有损压缩的近似不可逆映射函数的术语,其中有一组指定的可能输出值,并且该组可能的输出值中的每一成员具有导致对该特定输出值的选择的一组相关联的输入值。已经开发了各种量化技术,包括标量或矢量、均匀或非均匀、有或没有死区、以及自适应或非自适应量化。
量化操作本质上是按照量化参数QP的加偏除法(biased division),这在编码器处执行。反量化或乘法操作是与QP的乘法,这在解码器处执行。这些过程共同引入了原始变换系数数据的丢失,这表现为解码的图像中的压缩误差或伪像。在最简单的编解码器中,可向一帧中的所有变换系数应用特定的固定QP值。尽管这在某些情况下可能是可接受的解决方案,但是它也有几个缺点:
人类视觉系统对于所有频率,或对一帧内的所有空间位置,或对所有亮度和色度通道并不都是同样敏感的。对不同系数使用不同QP值提供了甚至具有相同或更少数量的压缩比特的视觉上更出众的编码。同样,也可适当地优化其它误差度量。
码率控制或编码器产生期望大小的压缩文件的能力并不容易在整个帧上用单个QP来执行。
因此,期望的是允许编码器以任意的方式跨图像改变QP。然而,这意味着用于每一数据分区的实际QP值应在比特流中用信号表示。这导致巨大的开销,仅仅是为了携带QP信号表示信息,从而导致其在实践中是不合适的。所需的是用信号通知QP的灵活但节省比特的手段,尤其是对于经常遇到的情形。
概括而言,量化是大多数图像和视频编解码器控制压缩的图像质量和压缩比的主要机制。大多数流行的编解码器支持的量化方法提供了极少的特征或极少的灵活性,或者导致附加比特的重大开销。通常,图像或视频帧通常被均匀地量化,或以在空间位置上改变量化的有限能力来量化。这一灵活性的缺乏损害了压缩质量,并阻止了进行中的准确的码率控制。另一方面,某些编解码器在支持量化方法方面提供几乎无限制的的自由。编码来用信号表示不同量化器的使用在已编码媒体中花费了额外的比特,并且本身会不利地影响压缩效率。此外,构建一致解码器的过程需要量化器方法的所有可能组合生成的大量测试遍,这可能是费力的。
概述
以下详细描述呈现了提供沿着已编码的数字媒体数据的各维改变量化的能力的灵活量化技术的各种变型。例如,该灵活量化技术的一种代表性实现可以在三个维度上改变量化-在(i)空间位置,(ii)频率子带,以及(iii)色通道上。该详细描述还呈现了在已编码数字媒体数据中高效地用信号表示该灵活量化的方式。该量化方法的好处是因涉及量化的辅助信息而引入的开销对于主要使用情形被最小化,同时如果编码器需要则允许最大的灵活性。
提供本概述以便以简化的形式介绍将在以下详细描述中进一步描述的一些概念。该概述不旨在标识所要求保护的主题的关键特征或本质特征,也不旨在用于帮助确定所要求保护的主题的范围。本发明的其它特征和优点在参考附图继续阅读以下对实施例的详细描述后将变得显而易见。
附图简述
图1是现有技术中常规的基于块变换的编解码器的框图。
图2是包含块模式编码的代表性编码器的流程图。
图3是包含块模式编码的代表性解码器的流程图。
图4是根据灵活量化技术的包含用于用信号表示DC量化器的伪代码定义的表。
图5是根据灵活量化技术的包含用于用信号表示低通量化器的伪代码定义的表。
图6是根据灵活量化技术的包含用于用信号表示高通量化器的伪代码定义的表。
图7是根据灵活量化技术的包含用于用信号表示帧层处的量化器的伪代码定义的表。
图8是根据灵活量化技术的包含用于用信号表示瓦块层处的量化器的伪代码定义的表。
图9是根据灵活量化技术的包含用于用信号表示瓦块层处的DC子带的量化器的伪代码定义的表。
图10是根据灵活量化技术的包含用于用信号表示瓦块层处的低通子带的量化器的伪代码定义的表。
图11是根据灵活量化技术的包含用于用信号表示瓦块层处的高通子带的量化器的伪代码定义的表。
图12是根据灵活量化技术的包含用于用信号表示宏块层处的量化器的伪代码定义的表。
图13是根据灵活量化技术的包含用于在频率模式中用信号表示宏块层处的低通量化器的伪代码定义的表。
图14是根据灵活量化技术的包含用于在频率模式中用信号表示宏块层处的高通量化器的伪代码定义的表。
图15是用于实现具有灵活量化的媒体编码器/解码器的合适的计算环境的框图。
详细描述
以下详细描述涉及提供能够改变沿着空间、频率和色彩维度应用的量化的高效灵活量化(此处称为“灵活量化”)的编码和解码技术。以下描述在数字媒体压缩系统或编解码器的上下文中描述了该技术的一个示例实现。该数字媒体系统以压缩形式对数字媒体数据进行编码以便传输或存储,并解码该数据以供回放或其它处理。出于说明的目的,包含这一灵活量化的该示例性压缩系统是图像或视频压缩系统。或者,该技术也可被结合到用于其它2D数据的压缩系统或编解码器中。灵活量化技术不要求数字媒体压缩系统以特定的编码格式来编码压缩的数字媒体数据。
1.编码器/解码器
图2和3是在代表性2维(2D)数据编码器200和解码器300中采用的过程的一般化图示。该图呈现了结合了实现块模式编码的2D数据编码器和解码器的压缩系统的一般化或简化的图示。在使用块模式编码的替换压缩系统中,可使用比本代表性编码器和解码器中所示的更多或更少的过程来进行2D数据压缩。例如,某些编码器/解码器还可包括色彩转换、色彩格式、可缩放编码、无损编码、宏块模式等等。取决于量化,压缩系统(编码器和解码器)可提供2D数据的无损和/或有损压缩,量化可基于从无损到有损变化的量化参数。
2D数据编码器200产生压缩比特流220,它是作为输入提供给编码器的2D数据210的更紧凑表示(对于典型输入)。例如,2D数据输入可以是图像、视频序列的一帧、或具有两个维度的其它数据。2D数据编码器将输入数据帧划分成块(一般在图2中示为分区230),这在所示的实现中是形成块该帧的平面的规则图案的非重叠4x4像素块。这些块被分组成称为宏块的群集,在该代表性编码器中其大小是16x16像素。宏块进而被分组成称为瓦块的规则结构。瓦块也可形成图像上的规则图案,使得水平行中的瓦块是统一的高度且是对齐的,而垂直列中的瓦块是统一的宽度且是对齐的。在该代表性编码器中,瓦块可以是任意大小,该大小在水平和/或垂直方向上是16的倍数。替换编码器实现可以将图像划分成块、宏块、瓦块或其它大小和结构的其它单元。
对块之间的每一边缘应用“前向重叠”算子240,之后使用块变换250来变换每一4×4的块。该块变换250可以是由Srinivasan在2004年12月17日提交的题为“ReversibleTransform For Lossy And Lossless 2-D Data Compression”(用于有损和无损2D数据压缩的可逆变换)的美国专利申请第11/015,707号中所描述的可逆的、无缩放的2D变换。重叠算子240可以是由Tu等人在2004年12月17日提交的题为“Reversible Overlap Operatorfor Efficient Lossless Data Compression”(用于高效无损数据压缩的可逆重叠算子)的美国专利申请第11/015,148号;以及Tu等人在2005年1月14日提交的题为“Reversible2-Dimensional Pre-/Post-Filter for Lapped Biorthogonal Transform”(用于重叠双正交变换的可逆2维预/后滤波器)的美国专利申请第11/035,991号中描述的可逆重叠算子。或者,可使用离散余弦变换或其它块变换和重叠算子。在变换之后,令每一4×4的变换块的DC系数260经受一类似的处理链(块化、前向重叠、之后是4×4的块变换)。所得的DC变换系数和AC变换系数被量化270、熵编码280和分组化290。
解码器执行反过程。在解码器侧,从其各自的分组中提取310变换系数位,从中系数本身被解码320和解量化330。DC系数340通过应用反变换来重新生成,并且DC系数的平面使用跨DC块边缘应用的合适的平滑算子来“反重叠”。随后,通过向DC系数应用4×4的反变换350来重新生成整个数据,并从比特流中解码AC系数342。最后,对所得图像平面中的块边缘进行反重叠滤波360。这产生经重构的2D数据输出。
在一个示例性实现中,编码器200(图2)将输入图像压缩成压缩比特流220(例如,文件),而解码器300(图3)基于是采用无损还是有损编码来重构原始输入或其近似。编码过程涉及应用以下所讨论的前向重叠变换(LT),这是用同样在以下更全面描述的可逆2维预/后滤波来实现的。解码过程涉及应用使用可逆2维预/后滤波的反重叠变换(ILT)。
所示的LT和ILT在确切的意义上是彼此的逆,并且因此可被统称为可逆重叠变换。作为一种可逆变换,LT/ILT对可用于无损图像压缩。
由所示的编码器200/解码器300压缩的输入数据210可以是各种色彩格式(例如,RGB/YUV 4:4:4、YUV 4:2:2或YUV 4:2:0彩色图像格式)的图像。通常,输入图像总是具有亮度(Y)分量。如果它是RGB/YUV 4:4:4、YUV 4:2:2或YUV 4:2:0图像,则该图像还具有色度分量,诸如U分量和V分量。图像的这些单独的色彩平面或分量可具有不同的空间分辨率。在例如YUV 4:2:0色彩格式的输入图像的情况下,U和V分量具有Y分量一半的宽度和高度。
如上所述,编码器200将输入图像或图片块化成宏块。在一个示例性实现中,编码器200将输入图像块化成Y通道中的16×16像素区域(称为“宏块”)(取决于色彩格式,可以是U和V通道中的16×16、16×8或8×8区域)。每一宏块色彩平面被块化成4×4像素的区域或块。因此,宏块按以下对于本示例性编码器实现的方式由各种色彩格式组成:
1.对于灰度图像,每一宏块包含16个4×4的亮度(Y)块。
2.对于YUV 4:2:0格式彩色图像,每一宏块包含16个4×4的Y块,并且4个各自为4×4的色度(U和V)块。
3.对于YUV 4:2:2格式彩色图像,每一宏块包含16个4×4的Y块,并且8个各自为4×4的色度(U和V)块。
4.对于RGB或YUV 4:4:4彩色图像,每一宏块对Y、U和V通道中的每一个包含16个块。
因此,在变换之后,该代表性编码器200/解码器300中的宏块具有三个频率子带:DC子带(DC宏块)、低通子带(低通宏块)和高通子带(高通宏块)。在该代表性系统中,低通和/或高通子带在比特流中是可任选的-这些子带可被完全丢弃。
此外,压缩的数据可按以下两种次序之一被压缩到比特流中:空间次序和频率次序。对于空间次序,瓦块内的同一宏块的不同子带被排序在一起,且所得的每一瓦块的比特流被写入一个分组中。对于频率次序,来自瓦块内的不同宏块的同一子带被分组在一起,且因此瓦块的比特流被写入三个分组中:DC瓦块分组、低通瓦块分组和高通瓦块分组。另外,可以有其它数据层。
由此,对于该代表性系统,图像按以下“维度”来组织:
空间维度:帧→瓦块→宏块;
频率维度:DC|低通|高通;以及
通道维度:亮度|色度_0|色度_1……(例如,Y|U|V)。
以上箭头表示分层结构,而垂直条表示划分。
尽管该代表性系统按照空间、频率和通道维度来组织压缩的数字媒体数据,但是此处描述的灵活量化方法可以应用于沿着更少、更多或其它维度来组织其数据的替换编码器/解码器系统。例如,该灵活量化方法可应用于使用更大数量的频带、其它格式的色通道(例如,YIQ、RGB等)、附加图像通道(例如,用于立体声视觉或其它多照相机阵列)的编码。
2.灵活量化综述
在该代表性编码器/解码器中,量化操作本质上是按照量化参数QP的加偏除法,这在编码器处执行。反量化或乘法操作是与QP的乘法,这在解码器处执行。然而,此处描述的灵活量化的替换实现可利用其它形式的量化,包括均匀和非均匀、标量或矢量、有或没有死区等。这些量化/反量化过程共同引入了原始变换系数数据的丢失,这表现为解码的图像中的压缩误差或伪像。在最简单的编解码器中,可向一帧中的所有变换系数应用特定的固定QP值。尽管这在某些情况下可能是可接受的解决方案,但是它也有几个缺点:
人类视觉系统对于所有频率,或对一帧内的所有空间位置,或对所有亮度和色度通道并不都是同样敏感的。对不同系数使用不同QP值提供了甚至具有相同或更少数量的压缩比特的视觉上更出众的编码。同样,也可适当地优化其它误差度量。
码率控制或编码器产生期望大小的压缩文件的能力并不容易在整个帧上用单个QP来执行。
因此,理想地,应当可能允许编码器以任意的方式跨图像改变QP。然而,这意味着用于每一数据分区(宏块/瓦块/通道/子带等)的实际QP值应在比特流中用信号表示。这导致巨大的开销,仅仅是为了携带QP信号表示信息,从而导致其在实践中是不合适的。所需的是用信号通知QP的灵活但节省比特的手段,尤其是对于经常遇到的情形。
此处描述的灵活量化技术提供了沿着已编码数字媒体数据的各个分区或维度来改变量化的能力。例如,代表性编码器200/解码器300系统中的灵活量化技术的一种实现可以在三个维度上改变量化-在(i)空间位置,(ii)频率子带,以及(iii)色通道上。然而,在该灵活量化技术的其它替换实现中,量化可以在更少、更多或其它数据维度或分组上变化。该技术还包括在已编码媒体数据中高效地用信号表示灵活量化的方式。该量化方法的好处是因涉及量化的辅助信息而引入的开销对于主要使用情形被最小化,同时如果编码器需要则允许最大的灵活性。
该灵活量化技术提供了对量化的细空间粒度控制。在一个具体实现中,该灵活量化允许对应用于帧、瓦块或向下到宏块的量化的控制。如果帧没有被均匀量化,则每一瓦块可以被均匀量化;如果瓦块没有被均匀量化,则每一宏块将被不同地量化。
该灵活量化还允许沿着频率子带维度进行量化控制。在一个具体实现中,该灵活量化包括指定频率子带之间的量化关系的子带模式。子带可被均匀量化,或被部分均匀量化(低通子带使用DC子带量化器,和/或高通子带使用低通量化器),或被独立量化。
该灵活量化还允许对沿着数据的通道维度应用的量化的控制。在一个具体实现中,该灵活量化包括指定色通道之间的量化关系的通道模式。通道可被均匀量化,或者部分地均匀量化(色度通道均匀,但亮度通道独立),或者被独立量化。
此处描述的灵活量化还提供高效地在压缩的数字媒体数据的辅助信息中用信号表示上述对空间、频率子带和通道的量化控制的组合的技术,这对于主要使用情形是重要的。此外,该灵活量化技术提供了通过从数字媒体数据中的一组定义的可能量化器子集进行索引来高效地定义量化器选择的方式。
3.空间维度中的灵活量化:
在空间维度中,在代表性编码器/解码器中由灵活量化技术提供三个选择:
·整个帧可使用相同的量化规则来编码。
·否则,整个瓦块可使用相同的量化规则来编码,而帧中的不同瓦块可以使用不同的量化规则。
·否则,瓦块中的每一宏块可使用相同的量化规则来编码,而瓦块中的不同宏块可以使用不同的量化规则。
用信号表示这些可能性的一种手段如下:在帧级的比特流中发送指示第一可能性是否为真的二进制信号。如果否,则在每一瓦块内的比特流中发送指示对该瓦块使用的量化规则的数目的固定长度码元。如果瓦块使用了多于一个量化规则,则在对应的瓦块内的每一宏块中发送指示由该宏块使用的量化规则的可变长度码元。解码器以与编码器一致的方式解释该比特流。
代表性编码器200/解码器300使用上述信号表示的变体。由此处标记为“XXX_FRAME_UNIFORM”的通用句法元素表示的二进制信号仅在帧级发送(其中XXX是指定量化器控制的特定频率子带或通道维度的占位符)。在瓦块级,仅当帧级句法元素(XXX_FRAME_UNIFORM)为假时在瓦块级句法元素(XXX_QUANTIZERS)中发送不同量化器规则的数目。如果该数目等于1,则意味着仅有一个规则,且因此该瓦块内的所有宏块用相同的量化规则来均匀编码(指示选择2),如果否,则指示第三种可能性的选择。
4.跨频带的灵活量化:
对于跨频带的灵活量化,代表性编码器200/解码器300的比特流句法定义两个开关:
·低通宏块使用与同一空间位置处的DC宏块相同的量化规则。这对应于句法元素USE_DC_QUANTIZER。
·高通宏块使用与同一空间位置处的低通宏块相同的量化规则。这对应于句法元素USE_LP_QUANTIZER。
这些开关在整个帧使用相同的量化规则时在帧层启用,或者在其它情况下在瓦块层启用。这些开关不在宏块层启用。因此,瓦块内的所有宏块跨频率子带遵守相同的规则。在适当(帧或瓦块)层处对每一开关发送一二进制码元。
5.跨图像通道的灵活量化:
对于跨通道的灵活量化,代表性编码器200/解码器300的比特流句法定义三个选择:
·所有通道-亮度和色度具有相同的量化规则。这由通用句法元素XXX_CH_MODE==CH_UNIFORM来指示。
·亮度遵循一个量化规则,而所有色度通道遵循一不同的量化规则,由XXX_CH_MODE==CH_MIXED指示。
·所有通道都自由选择不同的量化规则,由XXX_CH_MODE==CH_INDEPENDENT指示。
6.组合的灵活量化:
代表性编码器200/解码器300使用在以下图4-14所示的代码表中定义的比特流句法,该句法可以如上所述高效地跨维度来编码灵活量化选项中的特定选择。采用跨每一空间、频率子带和通道维度可用的若干量化选项,可用量化选项的排列数目是很大的。代表性编码器200/解码器300的比特流可以用空间或频率排序来布局的事实增加了跨三个维度的灵活量化的复杂性。然而,这不改变可用量化选项,并且仅影响信号的串行化。图4-14定义的句法提供了对组合的灵活量化规则的高效编码。
如在代表性编码器/解码器的句法中定义的组合的量化规则的某些突出特征如下。
不允许DC量化在宏块的基础上变化。这允许对量化的DC值不同地编码而不必进行反缩放操作。即使在AC(低通和高通)频带用变化的量化编码的时候也用相对较小的量化器来对图像瓦块的DC频带编码不会显著影响比特率。
在一个极端,帧内的所有变换系数使用相同的量化参数。在另一极端,用于所有通道的低通和高通量化规则都允许对瓦块/帧的每一宏块独立地变化。唯一的限制是不同低通和高通量化器规则(覆盖所有通道)的数目各自被限于16。每一这样的规则可以为每一通道指定独立的量化参数值。
在这些极端之间,允许如由图4-14所示的句法表指定的若干组合。
7.量化器参数的索引:
代表性编码器/解码器中的特定量化参数(QP)基于谐波比例。量化器参数索引(QPI)的8位值对应于可能相当大的QP值。执行第二级索引使得跨宏块变化的QPI可以用高效的方式来编码。
更具体而言,编码器200可以定义比特流中包含1到16个QPI“矢量”的集合。基于选择哪一XXX_CHANNEL_MODE,每一QPI矢量由一个或多个QPI值组成。基于频率子带开关,这些集合是为DC、低通和高通子带定义的。此外,DC集合仅有一个QPI矢量,因为在瓦块通道中只允许一个DC量化器。对这些集合的编码在图4-6所示的表中定义。
如图7-11的表所示,对DC、低通和高通频率子带的QPI矢量集合的信号表示如下发生。基于其它编码模式,每一集合的势(即,该集合中的QPI矢量数)对低通和高通子带在相应的瓦块或帧的开始处指示。DC集合的势为1。在该伪代码表中,表示势的句法元素被标记为“XXX_QUANTIZERS”。(在实践中,在比特流中发送XXX_QUANTIZERS–1)。表中标记为“XXX_QUANTIZER”的句法元素表示QPI集合的编码,这在图4-6所示的表中定义。
在宏块级,仅发送来自QPI集合内的所需QPI矢量的索引QI就足够。图12-14的表定义了在宏块的基础上发送QI的句法。对应于QI的句法元素被标记为“XXX_QUANTIZER_INDEX”。使用可变长度代码来用信号表示QI。首先,发送指示QI是否为0的一位码元。如果不是,则发送指示与0不同的特定QI的其长度由ceil(log2(XXX_QUANTIZERS-1))给出的固定长度代码。这允许用低至每宏块一位来对“默认”量化规则(QI=0)进行高效编码。当XXX_QUANTIZERS为1时,XXX_QUANTIZER_INDEX唯一地为0,且因此不需要用信号表示QI。
8.扩展
以上对灵活量化的描述是专用于其在代表性编码器和解码器中的实现以及句法的。然而,该技术的原理也可扩展到其它数字媒体压缩系统和格式。例如,代表性编码器/解码器只有三个频率子带(DC、低通和高通)。但是,更一般地,灵活量化的替换实现可以用直接的方式扩展到多个频率子带。同样,替换灵活量化实现可以在更细的空间粒度改变量化器,诸如通过在子宏块(诸如块)级发送量化索引(QI)信息。对灵活量化技术的基本原理的许多扩展在同一框架内都是可能的。
9.计算环境
上述用于灵活量化的处理技术可以在各种数字媒体编码和/或解码系统的任一种上实现,包括计算机(各种形状因数,包括服务器、台式机、膝上型计算机、手持式计算机等);数字媒体记录器和播放器;图像和视频捕捉设备(诸如照相机、扫描仪等);通信设备(诸如电话、移动电话、会议设备等);显示、打印或其它呈现设备;以及其它示例等等。该灵活量化技术可用硬件电路、控制数字媒体处理硬件的固件、以及在计算机或在其他计算环境中执行的通信软件来实现,诸如图15中所示。
图15示出了其中可实现所描述的实施例的合适计算环境(1500)的一个一般示例。计算环境(1500)并不旨在对本发明的使用范围或功能提出任何局限,因为本发明可在不同的通用或专用计算环境中实现。
参考图15,计算环境(1500)包括至少一个处理单元(1510)和存储器(1520)。在图15中,这一最基本的配置(1530)被包括在虚线内。处理单元(1510)执行计算机可执行指令,并且可以是真实或虚拟处理器。在多处理系统中,多个处理单元执行计算机可执行指令以提高处理能力。存储器(1520)可以是易失性存储器(例如,寄存器、高速缓存、RAM)、非易失性存储器(例如,ROM、EEPROM、闪存等)或两者的某种组合。存储器(1502)储存实现所描述的使用灵活量化技术的数字媒体编码/解码的软件(1580)。
计算环境可具有额外的特征。例如,计算环境(1500)包括存储(1540)、一个或多个输入设备(1550)、一个或多个输出设备(1560)以及一个或多个通信连接(1570)。诸如总线、控制器或网络等互连机制(未示出)将计算环境(1500)的各组件互连。通常,操作系统软件(未示出)为在计算环境(1500)中执行的其它软件提供操作环境,并协调计算环境(1500)的各组件的活动。
存储(1540)可以是可移动或不可移动的,并包括磁盘、磁带或磁带盒、CD-ROM、CD-RW、DVD或可用于储存信息并可在计算环境(1500)内访问的任何其它介质。存储(1540)储存实现所描述的使用灵活量化技术的数字媒体编码/解码的软件(1580)的指令。
输入设备(1550)可以是诸如键盘、鼠标、笔或跟踪球等触摸输入设备、语音输入设备、扫描设备或向计算环境(1500)提供输入的另一设备。对于音频,输入设备(1550)可以是声卡或接受来自话筒或话筒阵列的模拟或数字形式的音频输入的类似设备,或向计算环境提供音频样本的CD-ROM读取器。输出设备(1560)可以是显示器、打印机、扬声器、CD刻录机或提供来自计算环境(1500)的输出的另一设备。
通信连接(1570)允许在通信介质上与另一计算实体的通信。通信介质传达诸如计算机可执行指令、压缩音频或视频信息、或已调制数据信号中的其它数据的信息。已调制数据信号是其一个或多个特征以在信号中编码信息的方式设置或改变的信号。作为示例而非局限,通信介质包括以电、光、RF、红外、声学或其它载波实现的有线或无线技术。
此处所描述的使用灵活量化技术的数字媒体编码/解码可在计算机可读介质的一般上下文中描述。计算机可读介质可以是可在计算环境内访问的任何可用介质。作为示例而非局限,对于计算环境(1500),计算机可读介质可包括存储器(1520)、存储(1540)、通信介质和以上任一种的组合。
此处描述的使用灵活量化技术的数字媒体编码/解码可在诸如程序模块中所包括的、在目标真实或虚拟处理器上的计算环境中执行的计算机可执行指令的一般上下文中描述。一般而言,程序模块包括执行特定任务或实现特定抽象数据类型的例程、程序、库、对象、类、组件、数据结构等。程序模块的功能可以如各实施例中所需的组合或在程序模块之间分离。用于程序模块的计算机可执行指令可以在本地或分布式计算环境中执行。
出于表示的目的,详细描述使用了如“确定”、“生成”、“调整”和“应用”等术语来描述计算环境中的计算机操作。这些术语是由计算机执行的操作的高级抽象,且不应与人类所执行的动作混淆。对应于这些术语的实际的计算机操作取决于实现而不同。
鉴于可应用本发明的原理的许多可能的实施例,要求保护落入所附权利要求书及其等效技术方案的范围和精神之内的所有这样的实施例作为本发明。

Claims (8)

1.一种数字媒体处理方法,包括:
存储表示存储器中的压缩的数字媒体数据的比特流;以及
通过向所述数字媒体数据的块的变换系数应用量化参数并向所述数字媒体数据的所述块应用变换的反向操作来解码所述比特流,其中所述量化参数至少在第一空间维度量化模式和第二空间维度量化模式之间选择性地变化,在所述第一空间维度量化模式中跨一帧的全部部分应用相同的量化参数,在所述第二空间维度量化模式中所述帧的不同瓦块或同一瓦块中的不同宏块使用不同的量化参数。
2.如权利要求1所述的方法,其特征在于,所述量化参数通过指定所述量化参数的索引位置的量化参数索引值来用信号表示。
3.如权利要求1所述的方法,其特征在于,所述第一空间维度量化模式和所述第二空间维度量化模式在所述比特流中用信号表示。
4.一种图片解码器设备,包括:
用于存储已编码的图片数据的比特流的装置;以及
用于通过向所述图片数据的块的变换系数应用量化参数并向所述图片数据的所述块应用变换的反向操作来解码所述比特流的装置,其中所述量化参数至少在第一空间维度量化模式和第二空间维度量化模式之间选择性地变化,在所述第一空间维度量化模式中跨所述图片数据的一帧的全部部分应用相同的量化参数,在所述第二空间维度量化模式中所述帧的不同瓦块或同一瓦块中的不同宏块使用不同的量化参数。
5.如权利要求4所述的设备,其特征在于,所述量化参数通过指定所述量化参数的索引位置的量化参数索引值来用信号表示。
6.如权利要求4所述的设备,其特征在于,所述第一空间维度量化模式和所述第二空间维度量化模式在所述比特流中用信号表示。
7.一种数字媒体处理方法,包括:
通过向所述数字媒体数据的块应用变换的操作并向所述数字媒体数据的所述块的变换系数应用量化参数来编码数字媒体数据,其中所述量化参数至少在第一空间维度量化模式和第二空间维度量化模式之间选择性地变化,在所述第一空间维度量化模式中跨一帧的全部部分应用相同的量化参数,在所述第二空间维度量化模式中所述帧的不同瓦块或同一瓦块中的不同宏块使用不同的量化参数;以及
生成已编码数字媒体数据的比特流,所述比特流包括指示根据第一空间维度量化模式或第二空间维度量化模式进行编码的信号。
8.一种图片编码器设备,包括:
用于存储要被编码的图片数据的装置;以及
用于通过向所述图片数据的块应用变换的操作并向所述图片数据的所述块的变换系数应用量化参数来编码图片数据,其中所述量化参数至少在第一空间维度量化模式和第二空间维度量化模式之间选择性地变化,在所述第一空间维度量化模式中跨一帧的全部部分应用相同的量化参数,在所述第二空间维度量化模式中所述帧的不同瓦块或同一瓦块中的不同宏块使用不同的量化参数;以及
用于生成已编码图片数据的比特流的装置,所述比特流包括指示根据第一空间维度量化模式或第二空间维度量化模式进行编码的信号。
CN201610301806.3A 2006-05-05 2007-05-04 灵活量化 Active CN105812815B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/418,690 2006-05-05
US11/418,690 US8711925B2 (en) 2006-05-05 2006-05-05 Flexible quantization
CN2007800158719A CN101438591B (zh) 2006-05-05 2007-05-04 灵活量化

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN2007800158719A Division CN101438591B (zh) 2006-05-05 2007-05-04 灵活量化

Publications (2)

Publication Number Publication Date
CN105812815A CN105812815A (zh) 2016-07-27
CN105812815B true CN105812815B (zh) 2019-03-08

Family

ID=38661156

Family Applications (5)

Application Number Title Priority Date Filing Date
CN201610301862.7A Pending CN105915906A (zh) 2006-05-05 2007-05-04 灵活量化
CN201610301806.3A Active CN105812815B (zh) 2006-05-05 2007-05-04 灵活量化
CN201210297902.7A Active CN102833545B (zh) 2006-05-05 2007-05-04 灵活量化
CN2007800158719A Active CN101438591B (zh) 2006-05-05 2007-05-04 灵活量化
CN201610301837.9A Active CN105847826B (zh) 2006-05-05 2007-05-04 灵活量化

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201610301862.7A Pending CN105915906A (zh) 2006-05-05 2007-05-04 灵活量化

Family Applications After (3)

Application Number Title Priority Date Filing Date
CN201210297902.7A Active CN102833545B (zh) 2006-05-05 2007-05-04 灵活量化
CN2007800158719A Active CN101438591B (zh) 2006-05-05 2007-05-04 灵活量化
CN201610301837.9A Active CN105847826B (zh) 2006-05-05 2007-05-04 灵活量化

Country Status (13)

Country Link
US (11) US8711925B2 (zh)
EP (1) EP2016773B1 (zh)
JP (4) JP5385781B2 (zh)
KR (1) KR101477302B1 (zh)
CN (5) CN105915906A (zh)
AU (1) AU2007248524B2 (zh)
BR (1) BRPI0710704B1 (zh)
CA (1) CA2647332C (zh)
HK (2) HK1179084A1 (zh)
IL (2) IL194133A (zh)
MX (1) MX2008013647A (zh)
RU (2) RU2476000C2 (zh)
WO (1) WO2007130580A2 (zh)

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8422546B2 (en) * 2005-05-25 2013-04-16 Microsoft Corporation Adaptive video encoding using a perceptual model
CN101317458B (zh) * 2006-03-16 2012-04-18 华为技术有限公司 在编码过程中实现自适应量化的方法及装置
US8503536B2 (en) 2006-04-07 2013-08-06 Microsoft Corporation Quantization adjustments for DC shift artifacts
US7974340B2 (en) 2006-04-07 2011-07-05 Microsoft Corporation Adaptive B-picture quantization control
US8130828B2 (en) 2006-04-07 2012-03-06 Microsoft Corporation Adjusting quantization to preserve non-zero AC coefficients
US8059721B2 (en) 2006-04-07 2011-11-15 Microsoft Corporation Estimating sample-domain distortion in the transform domain with rounding compensation
US7995649B2 (en) 2006-04-07 2011-08-09 Microsoft Corporation Quantization adjustment based on texture level
US8711925B2 (en) 2006-05-05 2014-04-29 Microsoft Corporation Flexible quantization
US8238424B2 (en) 2007-02-09 2012-08-07 Microsoft Corporation Complexity-based adaptive preprocessing for multiple-pass video compression
US8498335B2 (en) 2007-03-26 2013-07-30 Microsoft Corporation Adaptive deadzone size adjustment in quantization
US8243797B2 (en) 2007-03-30 2012-08-14 Microsoft Corporation Regions of interest for quality adjustments
US8442337B2 (en) 2007-04-18 2013-05-14 Microsoft Corporation Encoding adjustments for animation content
US8331438B2 (en) 2007-06-05 2012-12-11 Microsoft Corporation Adaptive selection of picture-level quantization parameters for predicted video pictures
US8265162B2 (en) 2007-10-01 2012-09-11 Cisco Technology, Inc. Context adaptive position and amplitude coding of coefficients for video compression
US8204327B2 (en) * 2007-10-01 2012-06-19 Cisco Technology, Inc. Context adaptive hybrid variable length coding
US8527265B2 (en) * 2007-10-22 2013-09-03 Qualcomm Incorporated Low-complexity encoding/decoding of quantized MDCT spectrum in scalable speech and audio codecs
US8559499B2 (en) * 2007-10-26 2013-10-15 Zoran (France) S.A. Frame buffer compression for video processing devices
WO2009091521A2 (en) * 2008-01-14 2009-07-23 Thomson Licensing Methods and apparatus for de-artifact filtering using multi-lattice sparsity-based filtering
KR101446771B1 (ko) * 2008-01-30 2014-10-06 삼성전자주식회사 영상 부호화장치 및 영상 복호화장치
US8189933B2 (en) 2008-03-31 2012-05-29 Microsoft Corporation Classifying and controlling encoding quality for textured, dark smooth and smooth video content
US8897359B2 (en) 2008-06-03 2014-11-25 Microsoft Corporation Adaptive quantization for enhancement layer video coding
JP5136470B2 (ja) * 2009-03-06 2013-02-06 富士通株式会社 動画像符号化装置及び動画像符号化方法
US8588295B2 (en) 2009-03-09 2013-11-19 Mediatek Inc. Methods and electronic devices for quantization and de-quantization
KR101888679B1 (ko) * 2009-08-12 2018-08-16 톰슨 라이센싱 개선된 인트라 색차 엔코딩 및 디코딩을 위한 방법 및 장치
US20110298891A1 (en) * 2010-06-04 2011-12-08 Iowa State University Research Foundation, Inc. Composite phase-shifting algorithm for 3-d shape compression
JP2012169708A (ja) * 2011-02-09 2012-09-06 Sony Corp 映像信号処理装置、映像信号処理方法およびプログラム
US9363509B2 (en) * 2011-03-03 2016-06-07 Electronics And Telecommunications Research Institute Method for determining color difference component quantization parameter and device using the method
WO2012118359A2 (ko) 2011-03-03 2012-09-07 한국전자통신연구원 색차 성분 양자화 매개 변수 결정 방법 및 이러한 방법을 사용하는 장치
JP5648123B2 (ja) * 2011-04-20 2015-01-07 パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカPanasonic Intellectual Property Corporation of America 音声音響符号化装置、音声音響復号装置、およびこれらの方法
US9854275B2 (en) * 2011-06-25 2017-12-26 Qualcomm Incorporated Quantization in video coding
EP2748732A4 (en) * 2011-08-26 2015-09-23 Hewlett Packard Development Co MULTIDIMENSIONAL CLUSTERS FOR DATA PARTITIONING
CN103096052B (zh) 2011-11-04 2015-11-25 华为技术有限公司 一种图像编码、解码的方法和装置
US9749633B2 (en) * 2012-01-19 2017-08-29 Vid Scale, Inc. System and method of video coding quantization and dynamic range control
KR102154966B1 (ko) * 2012-02-29 2020-09-10 소니 주식회사 화상 처리 장치 및 방법, 및 기록 매체
GB2501552A (en) * 2012-04-26 2013-10-30 Sony Corp Video Data Encoding / Decoding with Different Max Chrominance Quantisation Steps for 4:2:2 and 4:4:4 Format
JP5950157B2 (ja) * 2012-05-18 2016-07-13 ソニー株式会社 画像処理装置および方法、並びに、プログラム
CN103428523B (zh) * 2012-05-22 2015-07-08 华为技术有限公司 评估视频质量的方法和装置
US8873892B2 (en) * 2012-08-21 2014-10-28 Cognex Corporation Trainable handheld optical character recognition systems and methods
US9445109B2 (en) * 2012-10-16 2016-09-13 Microsoft Technology Licensing, Llc Color adaptation in video coding
US9277214B2 (en) * 2013-02-15 2016-03-01 Cisco Technology, Inc. Sub-picture hierarchical QP coding
GB2512826B (en) * 2013-04-05 2017-05-10 Canon Kk Method and device for determining the value of a quantization parameter
CN104488266B (zh) * 2013-06-27 2018-07-06 北京大学深圳研究生院 Avs视频压缩编码方法及编码器
EP3039654A4 (en) * 2013-08-26 2017-04-05 Thomson Licensing Bit allocation scheme for repetitive structure discovery based 3d model compression
SE538512C2 (sv) * 2014-11-26 2016-08-30 Kelicomp Ab Improved compression and encryption of a file
US10298942B1 (en) * 2015-04-06 2019-05-21 Zpeg, Inc. Method and apparatus to process video sequences in transform space
US20160316220A1 (en) * 2015-04-21 2016-10-27 Microsoft Technology Licensing, Llc Video encoder management strategies
US10356408B2 (en) * 2015-11-27 2019-07-16 Canon Kabushiki Kaisha Image encoding apparatus and method of controlling the same
WO2018016381A1 (en) * 2016-07-22 2018-01-25 Sharp Kabushiki Kaisha Systems and methods for coding video data using adaptive component scaling
EP3349451A1 (en) * 2017-01-11 2018-07-18 Thomson Licensing Method and apparatus for selecting a coding mode used for encoding/decoding a residual block
JP6986868B2 (ja) * 2017-06-19 2021-12-22 キヤノン株式会社 画像符号化装置、画像復号装置、画像符号化方法、画像復号方法、プログラム
EP3461133B1 (en) * 2017-07-05 2023-11-22 OneSubsea IP UK Limited Data compression for communication in subsea oil and gas systems
US10368071B2 (en) * 2017-11-03 2019-07-30 Arm Limited Encoding data arrays
WO2019162231A1 (en) 2018-02-26 2019-08-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Selective quantization parameter transmission
WO2019174884A1 (en) * 2018-03-16 2019-09-19 Inveox Gmbh Automated identification, orientation and sample detection of a sample container
WO2019191218A1 (en) * 2018-03-30 2019-10-03 Interdigital Vc Holdings, Inc. Chroma quantization parameter adjustment in video encoding and decoding
GB2575121B (en) * 2018-06-29 2022-12-28 Imagination Tech Ltd Guaranteed data compression
JP2020150338A (ja) 2019-03-11 2020-09-17 キヤノン株式会社 画像復号装置、画像復号方法、及びプログラム
CN113785577B (zh) * 2019-04-26 2023-06-27 华为技术有限公司 用于指示色度量化参数映射函数的方法和装置
US11757814B2 (en) * 2019-04-28 2023-09-12 Isaac Ellsworth Media sharing application
GB2586517B (en) * 2019-08-23 2022-06-15 Imagination Tech Ltd Methods and decompression units for decompressing a compressed block of image data
US11626983B1 (en) * 2019-09-10 2023-04-11 Wells Fargo Bank, N.A. Systems and methods for post-quantum cryptography optimization
GB2599893A (en) * 2020-10-06 2022-04-20 Murata Manufacturing Co Isolated DC-DC converter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06189287A (ja) * 1992-12-15 1994-07-08 Sony Corp 画像符号化装置、画像符号化方法、画像復号化装置、および画像復号化方法
CN1512785A (zh) * 2002-12-27 2004-07-14 ���ǵ�����ʽ���� 基于离散余弦变换的高级视频编码方法和设备
CN1526236A (zh) * 2001-07-12 2004-09-01 �ű�ʵ������֤��˾ 用于改善压缩图像色度信息的方法和系统
JP2005524304A (ja) * 2002-04-23 2005-08-11 ノキア コーポレイション ビデオ符号化システムにおける量子化器パラメータを表示するための方法および装置
CN1672177A (zh) * 2002-07-30 2005-09-21 高通股份有限公司 数据压缩和解压缩中的参数选择
CN105847826A (zh) * 2006-05-05 2016-08-10 微软技术许可有限责任公司 灵活量化

Family Cites Families (472)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1681811A (en) 1922-10-19 1928-08-21 small
GB897363A (en) 1958-08-13 1962-05-23 Harries Television Res Ltd Improvements in or relating to display devices
GB1218015A (en) 1967-03-13 1971-01-06 Nat Res Dev Improvements in or relating to systems for transmitting television signals
US4460924A (en) 1978-04-19 1984-07-17 Quanticon Inc. Dither quantized signalling for color television
US4334244A (en) 1980-07-28 1982-06-08 Magnavox Government And Industrial Electronics Company Adaptive image enhancement system
FR2532138B1 (fr) 1982-08-20 1986-10-10 Thomson Csf Procede de compression de debit de donnees successivement transmises entre un emetteur et un recepteur de television et systeme mettant en oeuvre le procede
FR2562364B1 (fr) 1984-04-03 1987-06-19 Thomson Csf Procede et systeme de compression de debit de donnees numeriques transmises entre un emetteur et un recepteur de television
CA1327074C (en) 1985-02-28 1994-02-15 Tokumichi Murakami Interframe adaptive vector quantization encoding apparatus and video encoding transmission apparatus
DE3687659T2 (de) 1985-12-24 1993-07-29 British Broadcasting Corp Verfahren zum kodieren eines videosignals fuer die uebertragung in beschraenkter bandbreite.
US4760461A (en) 1986-02-28 1988-07-26 Kabushiki Kaisha Toshiba Binary data compression and expansion processing apparatus
DE3735349A1 (de) 1986-10-18 1988-04-28 Toshiba Kawasaki Kk Bildpresservorrichtung
JP2783534B2 (ja) 1986-11-13 1998-08-06 キヤノン株式会社 符号化装置
NL8700565A (nl) 1987-03-10 1988-10-03 Philips Nv Televisiesysteem waarin aan een transformatiekodering onderworpen gedigitaliseerde beeldsignalen worden overgebracht van een kodeerstation naar een dekodeerstation.
US4774574A (en) 1987-06-02 1988-09-27 Eastman Kodak Company Adaptive block transform image coding method and apparatus
US6563875B2 (en) 1987-12-30 2003-05-13 Thomson Licensing S.A. Adaptive method of encoding and decoding a series of pictures by transformation, and devices for implementing this method
JPH0666948B2 (ja) 1988-02-29 1994-08-24 三菱電機株式会社 フレーム間ベクトル量子化符号化復号化装置
US5194950A (en) 1988-02-29 1993-03-16 Mitsubishi Denki Kabushiki Kaisha Vector quantizer
US4821119A (en) 1988-05-04 1989-04-11 Bell Communications Research, Inc. Method and apparatus for low bit-rate interframe video coding
US4965830A (en) 1989-01-17 1990-10-23 Unisys Corp. Apparatus for estimating distortion resulting from compressing digital data
JPH0832047B2 (ja) 1989-04-28 1996-03-27 日本ビクター株式会社 予測符号化装置
US5179442A (en) 1989-06-02 1993-01-12 North American Philips Corporation Method and apparatus for digitally processing a high definition television augmentation signal
US5128758A (en) 1989-06-02 1992-07-07 North American Philips Corporation Method and apparatus for digitally processing a high definition television augmentation signal
US5241395A (en) 1989-08-07 1993-08-31 Bell Communications Research, Inc. Adaptive transform coding using variable block size
GB8918559D0 (en) 1989-08-15 1989-09-27 British Telecomm Video filter
JPH0828875B2 (ja) 1989-08-21 1996-03-21 三菱電機株式会社 符号化装置および復号化装置
US5144426A (en) 1989-10-13 1992-09-01 Matsushita Electric Industrial Co., Ltd. Motion compensated prediction interframe coding system
US5210623A (en) 1989-12-21 1993-05-11 Eastman Kodak Company Apparatus and method for quantizing and/or reconstructing multi-dimensional digital image signals
JP2841765B2 (ja) 1990-07-13 1998-12-24 日本電気株式会社 適応ビット割当て方法及び装置
JP3069363B2 (ja) * 1990-07-20 2000-07-24 株式会社日立製作所 動画像符号化方法、動画像符号化装置、データ記録装置およびデータ通信装置
US5146324A (en) 1990-07-31 1992-09-08 Ampex Corporation Data compression using a feedforward quantization estimator
US5303058A (en) 1990-10-22 1994-04-12 Fujitsu Limited Data processing apparatus for compressing and reconstructing image data
JPH0813138B2 (ja) 1990-11-28 1996-02-07 松下電器産業株式会社 画像符号化装置
US5136377A (en) 1990-12-11 1992-08-04 At&T Bell Laboratories Adaptive non-linear quantizer
US5625714A (en) 1991-01-10 1997-04-29 Olympus Optical Co., Ltd. Image signal decoding device capable of removing block distortion with simple structure
JP3187852B2 (ja) 1991-02-08 2001-07-16 ソニー株式会社 高能率符号化方法
US5333212A (en) 1991-03-04 1994-07-26 Storm Technology Image compression technique with regionally selective compression ratio
US5317672A (en) 1991-03-05 1994-05-31 Picturetel Corporation Variable bit rate speech encoder
JP3278187B2 (ja) 1991-03-14 2002-04-30 三菱電機株式会社 動き適応型輝度信号色信号分離フィルタ
US5611038A (en) 1991-04-17 1997-03-11 Shaw; Venson M. Audio/video transceiver provided with a device for reconfiguration of incompatibly received or transmitted video and audio information
EP0514688A2 (en) 1991-05-21 1992-11-25 International Business Machines Corporation Generalized shape autocorrelation for shape acquisition and recognition
EP0514663A3 (en) 1991-05-24 1993-07-14 International Business Machines Corporation An apparatus and method for motion video encoding employing an adaptive quantizer
ATE159396T1 (de) 1991-06-04 1997-11-15 Qualcomm Inc System zur adaptiven kompression der blockgrössen eines bildes
JP3152765B2 (ja) 1991-10-31 2001-04-03 株式会社東芝 画像符号化装置
TW241350B (zh) 1991-11-07 1995-02-21 Rca Thomson Licensing Corp
US5231484A (en) 1991-11-08 1993-07-27 International Business Machines Corporation Motion video compression system with adaptive bit allocation and quantization
US5253058A (en) 1992-04-01 1993-10-12 Bell Communications Research, Inc. Efficient coding scheme for multilevel video transmission
JP3245977B2 (ja) 1992-06-30 2002-01-15 ソニー株式会社 ディジタル画像信号の伝送装置
KR0132895B1 (ko) 1992-07-24 1998-10-01 강진구 적응 양자화 기능을 갖는 영상압축 및 신장방법과 그 장치
GB9216659D0 (en) 1992-08-05 1992-09-16 Gerzon Michael A Subtractively dithered digital waveform coding system
JPH0686264A (ja) 1992-08-31 1994-03-25 Hitachi Ltd 可変速度画像符号化方式
JP3348310B2 (ja) 1992-09-28 2002-11-20 ソニー株式会社 動画像符号化方法および動画像符号化装置
US5663763A (en) 1992-10-29 1997-09-02 Sony Corp. Picture signal encoding method and apparatus and picture signal decoding method and apparatus
KR0166722B1 (ko) 1992-11-30 1999-03-20 윤종용 부호화 및 복호화방법 및 그 장치
US5467134A (en) 1992-12-22 1995-11-14 Microsoft Corporation Method and system for compressing video data
US5544286A (en) 1993-01-29 1996-08-06 Microsoft Corporation Digital video data compression technique
TW224553B (en) 1993-03-01 1994-06-01 Sony Co Ltd Method and apparatus for inverse discrete consine transform and coding/decoding of moving picture
US5412429A (en) 1993-03-11 1995-05-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Picture data compression coder using subband/transform coding with a Lempel-Ziv-based coder
US5510785A (en) 1993-03-19 1996-04-23 Sony Corporation Method of coding a digital signal, method of generating a coding table, coding apparatus and coding method
EP1006731B1 (en) 1993-03-29 2007-06-13 Canon Kabushiki Kaisha Code amount control method and encoding apparatus for carrying it out
JPH06296275A (ja) 1993-04-08 1994-10-21 Sony Corp 画像信号符号化方法及び画像信号符号化装置
KR960010196B1 (ko) 1993-06-04 1996-07-26 배순훈 인간의 시각특성을 이용한 디씨(dc) 변환계수 양자화기
US5880775A (en) 1993-08-16 1999-03-09 Videofaxx, Inc. Method and apparatus for detecting changes in a video display
GB2281465B (en) 1993-08-27 1997-06-04 Sony Uk Ltd Image data compression
US5509089A (en) 1993-09-09 1996-04-16 Intel Corporation Method and system for encoding images using temporal filtering
US5724097A (en) 1993-10-18 1998-03-03 Mitsubishi Denki Kabushiki Kaisha Adaptive quantization of video based on edge detection
US6104751A (en) 1993-10-29 2000-08-15 Sgs-Thomson Microelectronics S.A. Apparatus and method for decompressing high definition pictures
BE1007807A3 (nl) 1993-11-30 1995-10-24 Philips Electronics Nv Inrichting voor het coderen van een videosignaal.
US5828786A (en) 1993-12-02 1998-10-27 General Instrument Corporation Analyzer and methods for detecting and processing video data types in a video data stream
JP3224465B2 (ja) 1993-12-22 2001-10-29 シャープ株式会社 画像符号化装置
US5537440A (en) 1994-01-07 1996-07-16 Motorola, Inc. Efficient transcoding device and method
KR0183688B1 (ko) 1994-01-12 1999-05-01 김광호 영상부호화방법 및 장치
US5587708A (en) 1994-01-19 1996-12-24 Industrial Technology Research Institute Division technique unified quantizer-dequantizer
US5592226A (en) 1994-01-26 1997-01-07 Btg Usa Inc. Method and apparatus for video data compression using temporally adaptive motion interpolation
JP3197420B2 (ja) 1994-01-31 2001-08-13 三菱電機株式会社 画像符号化装置
JPH07250327A (ja) 1994-03-08 1995-09-26 Matsushita Electric Ind Co Ltd 画像符号化方法
US5654760A (en) 1994-03-30 1997-08-05 Sony Corporation Selection of quantization step size in accordance with predicted quantization noise
US5649083A (en) 1994-04-15 1997-07-15 Hewlett-Packard Company System and method for dithering and quantizing image data to optimize visual quality of a color recovered image
CA2164627A1 (en) 1994-04-22 1995-11-02 Touradj Ebrahimi Method and device for encoding image signal and image signal decoding device
KR0148154B1 (ko) 1994-06-15 1998-09-15 김광호 움직임크기에 따른 동영상데이타의 부호화방법 및 장치
JP3954656B2 (ja) 1994-09-29 2007-08-08 ソニー株式会社 画像符号化装置及び方法
US5604856A (en) 1994-10-13 1997-02-18 Microsoft Corporation Motion compensated noise reduction method and system for computer generated images
US5802213A (en) 1994-10-18 1998-09-01 Intel Corporation Encoding video signals using local quantization levels
US6026190A (en) 1994-10-31 2000-02-15 Intel Corporation Image signal encoding with variable low-pass filter
US5539469A (en) 1994-12-30 1996-07-23 Daewoo Electronics Co., Ltd. Apparatus for determining motion vectors through the use of an adaptive median filtering technique
JP2738325B2 (ja) 1995-01-24 1998-04-08 日本電気株式会社 動き補償フレーム間予測装置
US5724456A (en) 1995-03-31 1998-03-03 Polaroid Corporation Brightness adjustment of images using digital scene analysis
US5623424A (en) 1995-05-08 1997-04-22 Kabushiki Kaisha Toshiba Rate-controlled digital video editing method and system which controls bit allocation of a video encoder by varying quantization levels
US5781788A (en) 1995-05-08 1998-07-14 Avc Technology, Inc. Full duplex single clip video codec
US5835149A (en) 1995-06-06 1998-11-10 Intel Corporation Bit allocation in a coded video sequence
JPH08336139A (ja) 1995-06-08 1996-12-17 Casio Comput Co Ltd 画像データ処理装置および量子化方法
US5926209A (en) 1995-07-14 1999-07-20 Sensormatic Electronics Corporation Video camera apparatus with compression system responsive to video camera adjustment
US5793371A (en) 1995-08-04 1998-08-11 Sun Microsystems, Inc. Method and apparatus for geometric compression of three-dimensional graphics data
KR100304660B1 (ko) 1995-09-22 2001-11-22 윤종용 누적에러처리를통한비디오신호부호화방법및부호화기
US5933535A (en) 1995-10-05 1999-08-03 Microsoft Corporation Object-based video compression process employing arbitrarily-shaped features
CA2187044C (en) 1995-10-06 2003-07-01 Vishal Markandey Method to reduce perceptual contouring in display systems
US5835495A (en) 1995-10-11 1998-11-10 Microsoft Corporation System and method for scaleable streamed audio transmission over a network
US5819035A (en) 1995-10-20 1998-10-06 Matsushita Electric Industrial Co., Ltd. Post-filter for removing ringing artifacts of DCT coding
US6160846A (en) 1995-10-25 2000-12-12 Sarnoff Corporation Apparatus and method for optimizing the rate control in a coding system
US6571019B1 (en) 1995-10-26 2003-05-27 Hyundai Curitel, Inc Apparatus and method of encoding/decoding a coded block pattern
US5926791A (en) 1995-10-26 1999-07-20 Sony Corporation Recursively splitting the low-frequency band with successively fewer filter taps in methods and apparatuses for sub-band encoding, decoding, and encoding and decoding
AU1329697A (en) 1995-12-08 1997-06-27 Trustees Of Dartmouth College Fast lossy internet image transmission apparatus and methods
US5761088A (en) 1995-12-18 1998-06-02 Philips Electronics North America Corporation Method and apparatus for channel identification using incomplete or noisy information
US5878166A (en) 1995-12-26 1999-03-02 C-Cube Microsystems Field frame macroblock encoding decision
US5835145A (en) 1996-01-19 1998-11-10 Lsi Logic Corporation Conversion system using programmable tables for compressing transform coefficients
US5799113A (en) 1996-01-19 1998-08-25 Microsoft Corporation Method for expanding contracted video images
JP3067628B2 (ja) 1996-01-19 2000-07-17 日本電気株式会社 画像符号化装置
US5787203A (en) 1996-01-19 1998-07-28 Microsoft Corporation Method and system for filtering compressed video images
US5731837A (en) 1996-01-25 1998-03-24 Thomson Multimedia, S.A. Quantization circuitry as for video signal compression systems
US6957350B1 (en) 1996-01-30 2005-10-18 Dolby Laboratories Licensing Corporation Encrypted and watermarked temporal and resolution layering in advanced television
JP3521596B2 (ja) 1996-01-30 2004-04-19 ソニー株式会社 信号符号化方法
US5682152A (en) 1996-03-19 1997-10-28 Johnson-Grace Company Data compression using adaptive bit allocation and hybrid lossless entropy encoding
US5786856A (en) 1996-03-19 1998-07-28 International Business Machines Method for adaptive quantization by multiplication of luminance pixel blocks by a modified, frequency ordered hadamard matrix
US5764814A (en) 1996-03-22 1998-06-09 Microsoft Corporation Representation and encoding of general arbitrary shapes
US5764803A (en) 1996-04-03 1998-06-09 Lucent Technologies Inc. Motion-adaptive modelling of scene content for very low bit rate model-assisted coding of video sequences
US5850482A (en) 1996-04-17 1998-12-15 Mcdonnell Douglas Corporation Error resilient method and apparatus for entropy coding
US5739861A (en) 1996-05-06 1998-04-14 Music; John D. Differential order video encoding system
US5815097A (en) 1996-05-23 1998-09-29 Ricoh Co. Ltd. Method and apparatus for spatially embedded coding
KR100324610B1 (ko) 1996-05-28 2002-02-27 모리시타 요이찌 화상예측 복호화장치 및 방법
US5809178A (en) 1996-06-11 1998-09-15 Apple Computer, Inc. Elimination of visible quantizing artifacts in a digital image utilizing a critical noise/quantizing factor
US6865291B1 (en) 1996-06-24 2005-03-08 Andrew Michael Zador Method apparatus and system for compressing data that wavelet decomposes by color plane and then divides by magnitude range non-dc terms between a scalar quantizer and a vector quantizer
CA2208950A1 (en) 1996-07-03 1998-01-03 Xuemin Chen Rate control for stereoscopic digital video encoding
KR100242637B1 (ko) 1996-07-06 2000-02-01 윤종용 동보상된 영상의 블록화효과 및 링잉노이즈 감소를 위한 루프필터링방법
DE69739006D1 (de) 1996-08-30 2008-11-06 Sony Corp Vorrichtung und verfahren zur aufnahme von standbildern und animationen
FR2753330B1 (fr) 1996-09-06 1998-11-27 Thomson Multimedia Sa Procede de quantification pour codage video
US6348945B1 (en) 1996-09-06 2002-02-19 Sony Corporation Method and device for encoding data
KR100297830B1 (ko) 1996-11-09 2001-08-07 윤종용 영상단위별 비트발생량 조절 장치 및 방법
US6233017B1 (en) 1996-09-16 2001-05-15 Microsoft Corporation Multimedia compression system with adaptive block sizes
GB2317525B (en) 1996-09-20 2000-11-08 Nokia Mobile Phones Ltd A video coding system
JPH10107644A (ja) 1996-09-26 1998-04-24 Sony Corp 量子化装置および方法、並びに、符号化装置および方法
JP3934712B2 (ja) 1996-09-27 2007-06-20 日本ビクター株式会社 映像信号符号化方法及び装置
KR100303685B1 (ko) 1996-09-30 2001-09-24 송문섭 영상 예측부호화 장치 및 그 방법
GB2318472B (en) 1996-10-09 2000-11-15 Sony Uk Ltd Processing encoded signals
KR100198788B1 (ko) 1996-12-09 1999-06-15 정선종 차동 펄스 부호 변조기를 포함한 양자화/역양자화 회로
US6263024B1 (en) 1996-12-12 2001-07-17 Matsushita Electric Industrial Co., Ltd. Picture encoder and picture decoder
JP4032446B2 (ja) 1996-12-12 2008-01-16 ソニー株式会社 映像データ圧縮装置およびその方法
JPH10174103A (ja) 1996-12-13 1998-06-26 Matsushita Electric Ind Co Ltd 画像符号化装置、符号化画像記録媒体、画像復号化装置、画像符号化方法、および符号化画像伝送方法
US6243497B1 (en) 1997-02-12 2001-06-05 Sarnoff Corporation Apparatus and method for optimizing the rate control in a coding system
US6347116B1 (en) 1997-02-14 2002-02-12 At&T Corp. Non-linear quantizer for video coding
EP1809044B1 (en) 1997-02-14 2008-10-01 Nippon Telegraph and Telephone Corporation Predictive decoding method of video data
US5969764A (en) 1997-02-14 1999-10-19 Mitsubishi Electric Information Technology Center America, Inc. Adaptive video coding method
US6373894B1 (en) 1997-02-18 2002-04-16 Sarnoff Corporation Method and apparatus for recovering quantized coefficients
US6118817A (en) 1997-03-14 2000-09-12 Microsoft Corporation Digital video signal encoder and encoding method having adjustable quantization
US6115420A (en) 1997-03-14 2000-09-05 Microsoft Corporation Digital video signal encoder and encoding method
US5844613A (en) 1997-03-17 1998-12-01 Microsoft Corporation Global motion estimator for motion video signal encoding
US6633611B2 (en) * 1997-04-24 2003-10-14 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for region-based moving image encoding and decoding
US6058215A (en) 1997-04-30 2000-05-02 Ricoh Company, Ltd. Reversible DCT for lossless-lossy compression
US5959693A (en) 1997-05-07 1999-09-28 General Instrument Corporation Pixel adaptive noise reduction filter for digital video
US6088392A (en) 1997-05-30 2000-07-11 Lucent Technologies Inc. Bit rate coder for differential quantization
JP3617253B2 (ja) 1997-06-03 2005-02-02 富士ゼロックス株式会社 画像符号化装置および方法
FI107496B (fi) 1997-07-18 2001-08-15 Nokia Mobile Phones Ltd Kuvan kompressointi
JPH1141610A (ja) 1997-07-24 1999-02-12 Nippon Telegr & Teleph Corp <Ntt> 可変速度符号化制御方法及び装置
US6281942B1 (en) 1997-08-11 2001-08-28 Microsoft Corporation Spatial and temporal filtering mechanism for digital motion video signals
KR100244290B1 (ko) 1997-09-09 2000-02-01 구자홍 저속 전송에서의 동영상을 위한 디블록킹 필터링 방법
US6091777A (en) 1997-09-18 2000-07-18 Cubic Video Technologies, Inc. Continuously adaptive digital video compression system and method for a web streamer
US6295379B1 (en) 1997-09-29 2001-09-25 Intel Corporation DPCM image compression with plural quantization table levels
AU1062999A (en) 1997-09-29 1999-04-23 Rockwell Semiconductor Systems, Inc. System and method for compressing images using multi-threshold wavelet coding
WO1999022525A1 (en) 1997-10-23 1999-05-06 Mitsubishi Denki Kabushiki Kaisha Image encoding method, image encoder, image decoding method, and image decoder
KR100487989B1 (ko) 1997-10-23 2005-05-09 미쓰비시덴키 가부시키가이샤 화상 복호화 장치 및 화상 부호화 장치
JP4531871B2 (ja) 1997-10-30 2010-08-25 富士通セミコンダクター株式会社 画像情報処理装置及び符号装置
WO1999025121A1 (en) * 1997-11-07 1999-05-20 Pipe Dream, Inc. Method for compressing and decompressing motion video
US6731811B1 (en) 1997-12-19 2004-05-04 Voicecraft, Inc. Scalable predictive coding method and apparatus
US6873368B1 (en) 1997-12-23 2005-03-29 Thomson Licensing Sa. Low noise encoding and decoding method
KR100243430B1 (ko) 1997-12-31 2000-02-01 구자홍 적응형 양자화 제어방법
US6275527B1 (en) 1998-01-14 2001-08-14 Conexant Systems, Inc. Pre-quantization in motion compensated video coding
WO1999038333A1 (en) 1998-01-26 1999-07-29 Sgs-Thomson Microelectronics Asia Pacific (Pte) Ltd. One-pass variable bit rate moving pictures encoding
CA2260578C (en) 1998-01-27 2003-01-14 At&T Corp. Method and apparatus for encoding video shape and texture information
JP3462066B2 (ja) 1998-01-29 2003-11-05 株式会社東芝 Adpcm圧縮装置、adpcm伸長装置及びadpcm圧縮伸長装置
US6360017B1 (en) 1998-03-05 2002-03-19 Lucent Technologies Inc. Perceptual-based spatio-temporal segmentation for motion estimation
US6249614B1 (en) 1998-03-06 2001-06-19 Alaris, Inc. Video compression and decompression using dynamic quantization and/or encoding
KR100281463B1 (ko) 1998-03-14 2001-02-01 전주범 물체 기반 부호화 시스템의 보조 정보 부호화 장치
TW501022B (en) 1998-03-16 2002-09-01 Mitsubishi Electric Corp Moving picture coding system
US6278735B1 (en) 1998-03-19 2001-08-21 International Business Machines Corporation Real-time single pass variable bit rate control strategy and encoder
US6125147A (en) 1998-05-07 2000-09-26 Motorola, Inc. Method and apparatus for reducing breathing artifacts in compressed video
US6115689A (en) 1998-05-27 2000-09-05 Microsoft Corporation Scalable audio coder and decoder
US6285774B1 (en) 1998-06-08 2001-09-04 Digital Video Express, L.P. System and methodology for tracing to a source of unauthorized copying of prerecorded proprietary material, such as movies
US7313318B2 (en) 1998-06-17 2007-12-25 Victor Company Of Japan, Limited Video signal encoding and recording apparatus with variable transmission rate
US6212232B1 (en) 1998-06-18 2001-04-03 Compaq Computer Corporation Rate control and bit allocation for low bit rate video communication applications
JP2000013794A (ja) 1998-06-23 2000-01-14 Mitsubishi Electric Corp 動画像符号化装置、動画像符号化方法、動画像復号装置、および動画像復号方法
US6411651B1 (en) 1998-06-26 2002-06-25 Compaq Information Technologies Group, L.P. Method and system for distributed video compression in personal computer architecture
US6275614B1 (en) 1998-06-26 2001-08-14 Sarnoff Corporation Method and apparatus for block classification and adaptive bit allocation
US6314208B1 (en) 1998-07-21 2001-11-06 Hewlett-Packard Company System for variable quantization in JPEG for compound documents
AU717480B2 (en) 1998-08-01 2000-03-30 Korea Advanced Institute Of Science And Technology Loop-filtering method for image data and apparatus therefor
US6389171B1 (en) 1998-08-14 2002-05-14 Apple Computer, Inc. Method and apparatus for a digital video cassette (DVC) decode system
US6219838B1 (en) 1998-08-24 2001-04-17 Sharewave, Inc. Dithering logic for the display of video information
KR100281967B1 (ko) 1998-08-31 2001-02-15 전주범 공간 상관성을 이용한 영상 부호화 장치 및 그 방법
US6380985B1 (en) 1998-09-14 2002-04-30 Webtv Networks, Inc. Resizing and anti-flicker filtering in reduced-size video images
US6256423B1 (en) 1998-09-18 2001-07-03 Sarnoff Corporation Intra-frame quantizer selection for video compression
US6546049B1 (en) 1998-10-05 2003-04-08 Sarnoff Corporation Parameterized quantization matrix adaptation for video encoding
AU743246B2 (en) 1998-11-04 2002-01-24 Mitsubishi Denki Kabushiki Kaisha Image decoder and image encoder
US6393155B1 (en) 1998-11-04 2002-05-21 International Business Machines Corporation Error reduction in transformed digital data
US6256422B1 (en) 1998-11-04 2001-07-03 International Business Machines Corporation Transform-domain correction of real-domain errors
US6584154B1 (en) 1998-11-26 2003-06-24 Oki Electric Industry Co., Ltd. Moving-picture coding and decoding method and apparatus with reduced computational cost
US6418166B1 (en) 1998-11-30 2002-07-09 Microsoft Corporation Motion estimation and block matching pattern
US6983018B1 (en) 1998-11-30 2006-01-03 Microsoft Corporation Efficient motion vector coding for video compression
US6223162B1 (en) 1998-12-14 2001-04-24 Microsoft Corporation Multi-level run length coding for frequency-domain audio coding
US6473534B1 (en) 1999-01-06 2002-10-29 Hewlett-Packard Company Multiplier-free implementation of DCT used in image and video processing and compression
WO2000049570A1 (en) 1999-02-19 2000-08-24 Unisearch Limited Method for visual optimisation of embedded block codes to exploit visual masking phenomena
US6473409B1 (en) 1999-02-26 2002-10-29 Microsoft Corp. Adaptive filtering system and method for adaptively canceling echoes and reducing noise in digital signals
CA2280662A1 (en) 1999-05-21 2000-11-21 Joe Toth Media server with multi-dimensional scalable data compression
US6370502B1 (en) 1999-05-27 2002-04-09 America Online, Inc. Method and system for reduction of quantization-induced block-discontinuities and general purpose audio codec
FR2794563B1 (fr) 1999-06-04 2002-08-16 Thomson Multimedia Sa Procede d'adressage de panneau d'affichage au plasma
US6625215B1 (en) 1999-06-07 2003-09-23 Lucent Technologies Inc. Methods and apparatus for context-based inter/intra coding mode selection
FI111764B (fi) 1999-06-10 2003-09-15 Nokia Corp Menetelmä ja järjestely kuvatiedon käsittelemiseksi
US6490319B1 (en) 1999-06-22 2002-12-03 Intel Corporation Region of interest video coding
JP2001008215A (ja) 1999-06-24 2001-01-12 Victor Co Of Japan Ltd 動画像符号化装置及びその方法
JP2001016594A (ja) 1999-06-29 2001-01-19 Hitachi Ltd 動画像の動き補償方法
US6263022B1 (en) 1999-07-06 2001-07-17 Philips Electronics North America Corp. System and method for fine granular scalable video with selective quality enhancement
EP1114555A1 (en) 1999-07-20 2001-07-11 Koninklijke Philips Electronics N.V. Encoding method for the compression of a video sequence
US6408026B1 (en) 1999-08-06 2002-06-18 Sony Corporation Deadzone quantization method and apparatus for image compression
FI107495B (fi) 1999-08-13 2001-08-15 Nokia Multimedia Network Termi Menetelmä ja järjestely koodatun digitaalisen kuvabittivirran volyymin tai tahdin pienentämiseksi
JP2001136535A (ja) 1999-08-25 2001-05-18 Fuji Xerox Co Ltd 画像符号化装置および量子化特性決定装置
US6788740B1 (en) 1999-10-01 2004-09-07 Koninklijke Philips Electronics N.V. System and method for encoding and decoding enhancement layer data using base layer quantization data
JP4562051B2 (ja) 1999-11-30 2010-10-13 独立行政法人産業技術総合研究所 損耗センサ付き切削工具の信号処理装置および信号処理方法
US6693645B2 (en) 1999-12-01 2004-02-17 Ivast, Inc. Optimized BIFS encoder
US6765962B1 (en) 1999-12-02 2004-07-20 Sarnoff Corporation Adaptive selection of quantization scales for video encoding
US6456744B1 (en) 1999-12-30 2002-09-24 Quikcat.Com, Inc. Method and apparatus for video compression using sequential frame cellular automata transforms
WO2001052550A1 (en) 2000-01-12 2001-07-19 Koninklijke Philips Electronics N.V. Image data compression
US6738423B1 (en) 2000-01-21 2004-05-18 Nokia Mobile Phones Ltd. Method for encoding and decoding video information, a motion compensated video encoder and a corresponding decoder
FI116819B (fi) 2000-01-21 2006-02-28 Nokia Corp Menetelmä kuvien lähettämiseksi ja kuvakooderi
US6600836B1 (en) 2000-01-28 2003-07-29 Qualcomm, Incorporated Quality based image compression
JP2001245303A (ja) 2000-02-29 2001-09-07 Toshiba Corp 動画像符号化装置および動画像符号化方法
US7035473B1 (en) 2000-03-01 2006-04-25 Sharp Laboratories Of America, Inc. Distortion-adaptive visual frequency weighting
JP4254017B2 (ja) 2000-03-10 2009-04-15 ソニー株式会社 画像符号化装置及び方法
JP2003533103A (ja) 2000-04-27 2003-11-05 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 ビデオ圧縮方法
US7289154B2 (en) 2000-05-10 2007-10-30 Eastman Kodak Company Digital image processing method and apparatus for brightness adjustment of digital images
US6876703B2 (en) 2000-05-11 2005-04-05 Ub Video Inc. Method and apparatus for video coding
US6747660B1 (en) 2000-05-12 2004-06-08 Microsoft Corporation Method and system for accelerating noise
US6873654B1 (en) 2000-05-16 2005-03-29 Redrock Semiconductor, Inc Method and system for predictive control for live streaming video/audio media
JP2001358948A (ja) 2000-06-15 2001-12-26 Canon Inc 画像処理方法及び装置
US7023922B1 (en) 2000-06-21 2006-04-04 Microsoft Corporation Video coding system and method using 3-D discrete wavelet transform and entropy coding with motion information
US6593925B1 (en) 2000-06-22 2003-07-15 Microsoft Corporation Parameterized animation compression methods and arrangements
US7177358B2 (en) 2000-06-27 2007-02-13 Mitsubishi Denki Kabushiki Kaisha Picture coding apparatus, and picture coding method
US20020021756A1 (en) 2000-07-11 2002-02-21 Mediaflow, Llc. Video compression using adaptive selection of groups of frames, adaptive bit allocation, and adaptive replenishment
WO2002007438A1 (en) 2000-07-17 2002-01-24 Trustees Of Boston University Generalized lapped biorthogonal transform embedded inverse discrete cosine transform and low bit rate video sequence coding artifact removal
JP4256574B2 (ja) 2000-08-04 2009-04-22 富士通株式会社 画像信号符号化方法および画像信号符号化装置
JP3825615B2 (ja) 2000-08-11 2006-09-27 株式会社東芝 動画像符号化装置および動画像符号化方法およびプログラムを記録した媒体
JP3561485B2 (ja) 2000-08-18 2004-09-02 株式会社メディアグルー 符号化信号分離・合成装置、差分符号化信号生成装置、符号化信号分離・合成方法、差分符号化信号生成方法、符号化信号分離・合成プログラムを記録した媒体および差分符号化信号生成プログラムを記録した媒体
US6678422B1 (en) 2000-08-30 2004-01-13 National Semiconductor Corporation Method and apparatus for image data compression with low memory requirement
US6834080B1 (en) 2000-09-05 2004-12-21 Kabushiki Kaisha Toshiba Video encoding method and video encoding apparatus
US6748020B1 (en) 2000-10-25 2004-06-08 General Instrument Corporation Transcoder-multiplexer (transmux) software architecture
KR100355829B1 (ko) 2000-12-13 2002-10-19 엘지전자 주식회사 영상의 공간적 유사성을 이용한 dpcm 영상 부호화 장치
US7058127B2 (en) 2000-12-27 2006-06-06 International Business Machines Corporation Method and system for video transcoding
WO2002054777A1 (en) 2000-12-28 2002-07-11 Koninklijke Philips Electronics N.V. Mpeg-2 down-sampled video generation
US7072525B1 (en) 2001-02-16 2006-07-04 Yesvideo, Inc. Adaptive filtering of visual image using auxiliary image information
US6757429B2 (en) 2001-02-21 2004-06-29 Boly Media Communications Inc. Method of compressing digital images
US8374237B2 (en) 2001-03-02 2013-02-12 Dolby Laboratories Licensing Corporation High precision encoding and decoding of video images
FR2822284B1 (fr) 2001-03-13 2004-01-02 Thomson Multimedia Sa Procede d'affichage d'images video sur panneau d'affichage a plasma et panneaux d'affichage a plasma correspondant
US6832005B2 (en) 2001-03-23 2004-12-14 Microsoft Corporation Adaptive encoding and decoding of bi-level images
US6831947B2 (en) 2001-03-23 2004-12-14 Sharp Laboratories Of America, Inc. Adaptive quantization based on bit rate prediction and prediction error energy
WO2002080572A1 (en) 2001-03-29 2002-10-10 Sony Corporation Image processing apparatus, image processing method, image processing program, and recording medium
US6687294B2 (en) 2001-04-27 2004-02-03 Koninklijke Philips Electronics N.V. Distortion quantizer model for video encoding
US7206453B2 (en) 2001-05-03 2007-04-17 Microsoft Corporation Dynamic filtering for lossy compression
US6882753B2 (en) 2001-06-04 2005-04-19 Silicon Integrated Systems Corp. Adaptive quantization using code length in image compression
US6704718B2 (en) 2001-06-05 2004-03-09 Microsoft Corporation System and method for trainable nonlinear prediction of transform coefficients in data compression
US6909745B1 (en) 2001-06-05 2005-06-21 At&T Corp. Content adaptive video encoder
US20030189980A1 (en) 2001-07-02 2003-10-09 Moonlight Cordless Ltd. Method and apparatus for motion estimation between video frames
KR100452317B1 (ko) * 2001-07-11 2004-10-12 삼성전자주식회사 포토리소그래피 공정시스템 및 그 방법
US6975680B2 (en) 2001-07-12 2005-12-13 Dolby Laboratories, Inc. Macroblock mode decision biasing for video compression systems
US7042941B1 (en) 2001-07-17 2006-05-09 Vixs, Inc. Method and apparatus for controlling amount of quantization processing in an encoder
US7079692B2 (en) 2001-07-24 2006-07-18 Koninklijke Philips Electronics N.V. Reduced complexity video decoding by reducing the IDCT computation in B-frames
US7801215B2 (en) 2001-07-24 2010-09-21 Sasken Communication Technologies Limited Motion estimation technique for digital video encoding applications
US6987889B1 (en) 2001-08-10 2006-01-17 Polycom, Inc. System and method for dynamic perceptual coding of macroblocks in a video frame
US7110455B2 (en) 2001-08-14 2006-09-19 General Instrument Corporation Noise reduction pre-processor for digital video using previously generated motion vectors and adaptive spatial filtering
JP4392782B2 (ja) 2001-08-21 2010-01-06 Kddi株式会社 低レート映像符号化における量子化制御方法
US6891889B2 (en) 2001-09-05 2005-05-10 Intel Corporation Signal to noise ratio optimization for video compression bit-rate control
US7440504B2 (en) 2001-09-24 2008-10-21 Broadcom Corporation Method and apparatus for performing deblocking filtering with interlace capability
US6977659B2 (en) 2001-10-11 2005-12-20 At & T Corp. Texture replacement in video sequences and images
US6992725B2 (en) 2001-10-22 2006-01-31 Nec Electronics America, Inc. Video data de-interlacing using perceptually-tuned interpolation scheme
US7107584B2 (en) 2001-10-23 2006-09-12 Microsoft Corporation Data alignment between native and non-native shared data structures
US6810083B2 (en) 2001-11-16 2004-10-26 Koninklijke Philips Electronics N.V. Method and system for estimating objective quality of compressed video data
KR100643453B1 (ko) 2001-11-17 2006-11-10 엘지전자 주식회사 오브젝트 기반 비트율 제어방법
US6993200B2 (en) 2001-11-20 2006-01-31 Sony Corporation System and method for effectively rendering high dynamic range images
DE60230666D1 (de) * 2001-11-29 2009-02-12 Panasonic Corp Verfahren zur beseitigung von kodierungsverzerrung und verfahren zur videokodierung und -dekodierung
US7295609B2 (en) * 2001-11-30 2007-11-13 Sony Corporation Method and apparatus for coding image information, method and apparatus for decoding image information, method and apparatus for coding and decoding image information, and system of coding and transmitting image information
JP4254147B2 (ja) 2001-11-30 2009-04-15 ソニー株式会社 画像情報符号化方法及び装置、並びにプログラム及び記録媒体
US7200275B2 (en) 2001-12-17 2007-04-03 Microsoft Corporation Skip macroblock coding
CN101448162B (zh) 2001-12-17 2013-01-02 微软公司 处理视频图像的方法
US6763068B2 (en) 2001-12-28 2004-07-13 Nokia Corporation Method and apparatus for selecting macroblock quantization parameters in a video encoder
EP1470726A1 (en) 2001-12-31 2004-10-27 STMicroelectronics Asia Pacific Pte Ltd. Video encoding
US6985529B1 (en) 2002-01-07 2006-01-10 Apple Computer, Inc. Generation and use of masks in MPEG video encoding to indicate non-zero entries in transformed macroblocks
US20030128754A1 (en) 2002-01-09 2003-07-10 Hiroshi Akimoto Motion estimation method for control on the basis of scene analysis in video compression systems
US6647152B2 (en) 2002-01-25 2003-11-11 Thomson Licensing S.A. Method and system for contouring reduction
US20050105889A1 (en) 2002-03-22 2005-05-19 Conklin Gregory J. Video picture compression artifacts reduction via filtering and dithering
US7430303B2 (en) 2002-03-29 2008-09-30 Lockheed Martin Corporation Target detection method and system
US7116831B2 (en) 2002-04-10 2006-10-03 Microsoft Corporation Chrominance motion vector rounding
WO2003091850A2 (en) 2002-04-26 2003-11-06 The Trustees Of Columbia University In The City Of New York Method and system for optimal video transcoding based on utility function descriptors
US7242713B2 (en) 2002-05-02 2007-07-10 Microsoft Corporation 2-D transforms for image and video coding
US7609767B2 (en) 2002-05-03 2009-10-27 Microsoft Corporation Signaling for fading compensation
US20030215011A1 (en) 2002-05-17 2003-11-20 General Instrument Corporation Method and apparatus for transcoding compressed video bitstreams
US7145948B2 (en) 2002-05-29 2006-12-05 Koninklijke Philips Electronics N.V. Entropy constrained scalar quantizer for a Laplace-Markov source
JP2004023288A (ja) 2002-06-13 2004-01-22 Kddi R & D Laboratories Inc 動画像符号化のための前処理方式
US6961376B2 (en) 2002-06-25 2005-11-01 General Instrument Corporation Methods and apparatus for rate control during dual pass encoding
US7280700B2 (en) 2002-07-05 2007-10-09 Microsoft Corporation Optimization techniques for data compression
US7599579B2 (en) 2002-07-11 2009-10-06 Ge Medical Systems Global Technology Company, Llc Interpolated image filtering method and apparatus
JP2004056249A (ja) * 2002-07-17 2004-02-19 Sony Corp 符号化装置および方法、復号装置および方法、記録媒体、並びにプログラム
US6947045B1 (en) 2002-07-19 2005-09-20 At&T Corporation Coding of animated 3-D wireframe models for internet streaming applications: methods, systems and program products
US6891548B2 (en) 2002-08-23 2005-05-10 Hewlett-Packard Development Company, L.P. System and method for calculating a texture-mapping gradient
WO2004023819A2 (en) 2002-09-06 2004-03-18 Koninklijke Philips Electronics N.V. Content-adaptive multiple description motion compensation for improved efficiency and error resilience
US6795584B2 (en) 2002-10-03 2004-09-21 Nokia Corporation Context-based adaptive variable length coding for adaptive block transforms
US6807317B2 (en) 2002-10-25 2004-10-19 Motorola, Inc. Method and decoder system for reducing quantization effects of a decoded image
US7139437B2 (en) 2002-11-12 2006-11-21 Eastman Kodak Company Method and system for removing artifacts in compressed images
GB0228556D0 (en) 2002-12-06 2003-01-15 British Telecomm Video quality measurement
US8054880B2 (en) 2004-12-10 2011-11-08 Tut Systems, Inc. Parallel rate control for digital video encoder with multi-processor architecture and picture-based look-ahead window
US7099389B1 (en) 2002-12-10 2006-08-29 Tut Systems, Inc. Rate control with picture-based lookahead window
JP4214771B2 (ja) 2002-12-12 2009-01-28 ソニー株式会社 画像処理装置およびその方法と符号化装置
KR100584552B1 (ko) 2003-01-14 2006-05-30 삼성전자주식회사 동영상 부호화 및 복호화 방법과 그 장치
US7212571B2 (en) 2003-01-31 2007-05-01 Seiko Epson Corporation Method and apparatus for DCT domain filtering for block based encoding
EP1445958A1 (en) 2003-02-05 2004-08-11 STMicroelectronics S.r.l. Quantization method and system, for instance for video MPEG applications, and computer program product therefor
KR100539923B1 (ko) 2003-02-10 2005-12-28 삼성전자주식회사 화상통화시 화자의 영상을 구분하여 차등적 부호화할 수있는 비디오 엔코더 및 이를 이용한 비디오신호의 압축방법
JP3984178B2 (ja) 2003-02-13 2007-10-03 日本電信電話株式会社 映像符号化方法、映像符号化装置、映像符号化プログラム及びそのプログラムを記録した記録媒体
US7227587B2 (en) 2003-03-05 2007-06-05 Broadcom Corporation System and method for three dimensional comb filtering
KR100977713B1 (ko) 2003-03-15 2010-08-24 삼성전자주식회사 영상신호의 글자 인식을 위한 전처리 장치 및 방법
SG140441A1 (en) 2003-03-17 2008-03-28 St Microelectronics Asia Decoder and method of decoding using pseudo two pass decoding and one pass encoding
KR20060105408A (ko) 2005-04-01 2006-10-11 엘지전자 주식회사 영상 신호의 스케일러블 인코딩 및 디코딩 방법
EP1465349A1 (en) 2003-03-31 2004-10-06 Interuniversitair Microelektronica Centrum Vzw Embedded multiple description scalar quantizers for progressive image transmission
KR20060009898A (ko) 2003-05-06 2006-02-01 코닌클리케 필립스 일렉트로닉스 엔.브이. 블록 기반 적응성 스캔 순서를 이용한 비디오 정보 인코딩
GB2401502B (en) 2003-05-07 2007-02-14 British Broadcasting Corp Data processing
US20130107938A9 (en) 2003-05-28 2013-05-02 Chad Fogg Method And Apparatus For Scalable Video Decoder Using An Enhancement Stream
US7512180B2 (en) 2003-06-25 2009-03-31 Microsoft Corporation Hierarchical data compression system and method for coding video data
WO2005004335A2 (en) 2003-06-25 2005-01-13 Georgia Tech Research Corporation Cauchy-distribution based coding system and method
US7200277B2 (en) * 2003-07-01 2007-04-03 Eastman Kodak Company Method for transcoding a JPEG2000 compressed image
US7194031B2 (en) 2003-07-09 2007-03-20 Silicon Integrated Systems Corp. Rate control method with region of interesting support
US7383180B2 (en) 2003-07-18 2008-06-03 Microsoft Corporation Constant bitrate media encoding techniques
JP4388771B2 (ja) * 2003-07-18 2009-12-24 三菱電機株式会社 動画像復号装置、および動画像復号方法
US8218624B2 (en) 2003-07-18 2012-07-10 Microsoft Corporation Fractional quantization step sizes for high bit rates
US7602851B2 (en) 2003-07-18 2009-10-13 Microsoft Corporation Intelligent differential quantization of video coding
US7426308B2 (en) 2003-07-18 2008-09-16 Microsoft Corporation Intraframe and interframe interlace coding and decoding
US7343291B2 (en) 2003-07-18 2008-03-11 Microsoft Corporation Multi-pass variable bitrate media encoding
US7738554B2 (en) 2003-07-18 2010-06-15 Microsoft Corporation DC coefficient signaling at small quantization step sizes
US7580584B2 (en) 2003-07-18 2009-08-25 Microsoft Corporation Adaptive multiple quantization
US20050013498A1 (en) 2003-07-18 2005-01-20 Microsoft Corporation Coding of motion vector information
US7609763B2 (en) 2003-07-18 2009-10-27 Microsoft Corporation Advanced bi-directional predictive coding of video frames
KR100520298B1 (ko) 2003-07-26 2005-10-13 삼성전자주식회사 디더링 방법 및 디더링 장치
US20050024487A1 (en) 2003-07-31 2005-02-03 William Chen Video codec system with real-time complexity adaptation and region-of-interest coding
US7158668B2 (en) 2003-08-01 2007-01-02 Microsoft Corporation Image processing using linear light values and other image processing improvements
KR100505699B1 (ko) 2003-08-12 2005-08-03 삼성전자주식회사 실시간 가변 비트율 제어로 화질을 개선시키는 비디오인코더의 인코딩율 제어기, 이를 구비한 비디오 데이터전송 시스템 및 그 방법
TWI232681B (en) 2003-08-27 2005-05-11 Mediatek Inc Method of transforming one video output format into another video output format without degrading display quality
US7609762B2 (en) 2003-09-07 2009-10-27 Microsoft Corporation Signaling for entry point frames with predicted first field
US7724827B2 (en) 2003-09-07 2010-05-25 Microsoft Corporation Multi-layer run level encoding and decoding
US7924921B2 (en) 2003-09-07 2011-04-12 Microsoft Corporation Signaling coding and display options in entry point headers
JP5280003B2 (ja) 2003-09-07 2013-09-04 マイクロソフト コーポレーション 映像コーデックにおけるスライス層
WO2005036886A1 (en) 2003-10-13 2005-04-21 Koninklijke Philips Electronics N.V. Two-pass video encoding
US20050084013A1 (en) 2003-10-15 2005-04-21 Limin Wang Frequency coefficient scanning paths
US20050105612A1 (en) 2003-11-14 2005-05-19 Sung Chih-Ta S. Digital video stream decoding method and apparatus
US8223844B2 (en) 2003-11-14 2012-07-17 Intel Corporation High frequency emphasis in decoding of encoded signals
JP4063205B2 (ja) 2003-11-20 2008-03-19 セイコーエプソン株式会社 画像データ圧縮装置及びエンコーダ
EP1536647A1 (en) 2003-11-26 2005-06-01 STMicroelectronics Limited A video decoding device
CN100342728C (zh) 2003-11-28 2007-10-10 联发科技股份有限公司 控制视频信号编码比特流的量化程度的方法与相关装置
US20070160126A1 (en) 2003-12-03 2007-07-12 Koninklijke Philips Electronic, N.V. System and method for improved scalability support in mpeg-2 systems
KR20050061762A (ko) 2003-12-18 2005-06-23 학교법인 대양학원 부호화 모드 결정방법, 움직임 추정방법 및 부호화 장치
US7391809B2 (en) 2003-12-30 2008-06-24 Microsoft Corporation Scalable video transcoding
US7471845B2 (en) 2004-01-06 2008-12-30 Sharp Laboratories Of America, Inc. De-ringing filter
WO2005065030A2 (en) 2004-01-08 2005-07-21 Videocodes, Inc. Video compression device and a method for compressing video
KR100556340B1 (ko) 2004-01-13 2006-03-03 (주)씨앤에스 테크놀로지 영상 부호화 장치
US7912122B2 (en) 2004-01-20 2011-03-22 Panasonic Corporation Picture coding method, picture decoding method, picture coding apparatus, picture decoding apparatus
ES2392437T3 (es) * 2004-01-30 2012-12-10 Panasonic Corporation Procedimiento de decodificación de vídeos que utiliza matrices de cuantificación adaptativas
US20050190836A1 (en) * 2004-01-30 2005-09-01 Jiuhuai Lu Process for maximizing the effectiveness of quantization matrices in video codec systems
US7492820B2 (en) 2004-02-06 2009-02-17 Apple Inc. Rate control for video coder employing adaptive linear regression bits modeling
EP1564997A1 (en) 2004-02-12 2005-08-17 Matsushita Electric Industrial Co., Ltd. Encoding and decoding of video images based on a quantization with an adaptive dead-zone size
CN1922886B (zh) 2004-02-20 2012-08-01 日本电气株式会社 图像编码方法及其设备
JP4273996B2 (ja) 2004-02-23 2009-06-03 ソニー株式会社 画像符号化装置及び方法、並びに画像復号装置及び方法
JP2005260467A (ja) 2004-03-10 2005-09-22 Konica Minolta Opto Inc 画像処理装置
US8503542B2 (en) 2004-03-18 2013-08-06 Sony Corporation Methods and apparatus to reduce blocking noise and contouring effect in motion compensated compressed video
US7689051B2 (en) 2004-04-15 2010-03-30 Microsoft Corporation Predictive lossless coding of images and video
JP4476104B2 (ja) 2004-04-22 2010-06-09 三洋電機株式会社 符号化回路
US7801383B2 (en) 2004-05-15 2010-09-21 Microsoft Corporation Embedded scalar quantizers with arbitrary dead-zone ratios
US20050259729A1 (en) 2004-05-21 2005-11-24 Shijun Sun Video coding with quality scalability
US20050276493A1 (en) 2004-06-01 2005-12-15 Jun Xin Selecting macroblock coding modes for video encoding
US20060018522A1 (en) * 2004-06-14 2006-01-26 Fujifilm Software(California), Inc. System and method applying image-based face recognition for online profile browsing
US20070230565A1 (en) 2004-06-18 2007-10-04 Tourapis Alexandros M Method and Apparatus for Video Encoding Optimization
KR101320260B1 (ko) 2004-06-18 2013-10-23 톰슨 라이센싱 비디오 신호 데이터를 인코딩 및 디코딩하기 위한 방법 및 장치
EP1774793A4 (en) 2004-06-23 2010-08-25 Agency Science Tech & Res SCALABLE VIDEO CODING WITH LATERAL MOTOR ESTIMATION AND COMPENSATION
JP4594688B2 (ja) * 2004-06-29 2010-12-08 オリンパス株式会社 画像符号化処理方法、画像復号化処理方法、動画圧縮処理方法、動画伸張処理方法、画像符号化処理プログラム、画像符号化装置、画像復号化装置、画像符号化/復号化システム、拡張画像圧縮伸張処理システム
FR2872973A1 (fr) 2004-07-06 2006-01-13 Thomson Licensing Sa Procede ou dispositif de codage d'une sequence d'images sources
US7606427B2 (en) 2004-07-08 2009-10-20 Qualcomm Incorporated Efficient rate control techniques for video encoding
KR100678949B1 (ko) 2004-07-15 2007-02-06 삼성전자주식회사 비디오 코딩 및 디코딩 방법, 비디오 인코더 및 디코더
JP2008507915A (ja) 2004-07-20 2008-03-13 クゥアルコム・インコーポレイテッド 映像圧縮のための符号器補助式フレーム速度アップコンバージョンのための方法及び装置
US7474316B2 (en) 2004-08-17 2009-01-06 Sharp Laboratories Of America, Inc. Bit-depth extension of digital displays via the use of models of the impulse response of the visual system
US20060056508A1 (en) 2004-09-03 2006-03-16 Phillippe Lafon Video coding rate control
CA2575908A1 (en) 2004-09-14 2006-03-23 Gary Demos High quality wide-range multi-layer compression coding system
DE102004059993B4 (de) 2004-10-15 2006-08-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Erzeugen einer codierten Videosequenz unter Verwendung einer Zwischen-Schicht-Bewegungsdaten-Prädiktion sowie Computerprogramm und computerlesbares Medium
KR100679022B1 (ko) 2004-10-18 2007-02-05 삼성전자주식회사 계층간 필터링을 이용한 비디오 코딩 및 디코딩방법과,비디오 인코더 및 디코더
US20060098733A1 (en) 2004-11-08 2006-05-11 Kabushiki Kaisha Toshiba Variable-length coding device and method of the same
JP2006140758A (ja) 2004-11-12 2006-06-01 Toshiba Corp 動画像符号化方法、動画像符号化装置および動画像符号化プログラム
US20060104350A1 (en) 2004-11-12 2006-05-18 Sam Liu Multimedia encoder
CN101069432B (zh) 2004-12-02 2015-10-21 汤姆逊许可公司 用于视频编码器速率控制的量化参数的确定方法和设备
US7620103B2 (en) 2004-12-10 2009-11-17 Lsi Corporation Programmable quantization dead zone and threshold for standard-based H.264 and/or VC1 video encoding
US8031768B2 (en) 2004-12-15 2011-10-04 Maxim Integrated Products, Inc. System and method for performing optimized quantization via quantization re-scaling
EP1675402A1 (en) 2004-12-22 2006-06-28 Thomson Licensing Optimisation of a quantisation matrix for image and video coding
US7136536B2 (en) 2004-12-22 2006-11-14 Telefonaktiebolaget L M Ericsson (Publ) Adaptive filter
US7653129B2 (en) 2004-12-28 2010-01-26 General Instrument Corporation Method and apparatus for providing intra coding frame bit budget
WO2006070787A1 (ja) 2004-12-28 2006-07-06 Nec Corporation 動画像符号化方法、及びこれを用いた装置と、コンピュータプログラム
CN101103632A (zh) 2005-01-07 2008-01-09 皇家飞利浦电子股份有限公司 利用动态地基于法向流的量化步长来处理视频信号的方法
WO2006075895A1 (en) 2005-01-14 2006-07-20 Electronics And Telecommunications Research Institute Method of encoding and decoding texture coordinates in three-dimensional mesh information for effective texture mapping
CN101111864A (zh) 2005-01-31 2008-01-23 皇家飞利浦电子股份有限公司 用于多分辨率图像滤波的金字塔式分解
US20060188014A1 (en) 2005-02-23 2006-08-24 Civanlar M R Video coding and adaptation by semantics-driven resolution control for transport and storage
US7724972B2 (en) 2005-03-01 2010-05-25 Qualcomm Incorporated Quality metric-biased region-of-interest coding for video telephony
KR100763178B1 (ko) 2005-03-04 2007-10-04 삼성전자주식회사 색 공간 스케일러블 비디오 코딩 및 디코딩 방법, 이를위한 장치
KR100728222B1 (ko) 2005-03-25 2007-06-13 한국전자통신연구원 공간영역에서의 완전한 스케일러빌리티를 위한 계층적 부호화/복호화 방법 및 장치
WO2006104363A1 (en) 2005-04-01 2006-10-05 Lg Electronics Inc. Method for scalably encoding and decoding video signal
US8325797B2 (en) 2005-04-11 2012-12-04 Maxim Integrated Products, Inc. System and method of reduced-temporal-resolution update for video coding and quality control
US7876833B2 (en) 2005-04-11 2011-01-25 Sharp Laboratories Of America, Inc. Method and apparatus for adaptive up-scaling for spatially scalable coding
CA2604203A1 (en) 2005-04-13 2006-10-19 Nokia Corporation Coding, storage and signalling of scalability information
KR100746007B1 (ko) 2005-04-19 2007-08-06 삼성전자주식회사 엔트로피 코딩의 컨텍스트 모델을 적응적으로 선택하는방법 및 비디오 디코더
KR100763181B1 (ko) 2005-04-19 2007-10-05 삼성전자주식회사 기초계층과 향상계층의 데이터를 바탕으로 예측 정보를코딩하여 코딩율을 향상시키는 방법 및 장치
US7620252B2 (en) 2005-04-22 2009-11-17 Hewlett-Packard Development Company, L.P. System and method for compressing an image
US7657098B2 (en) 2005-05-02 2010-02-02 Samsung Electronics Co., Ltd. Method and apparatus for reducing mosquito noise in decoded video sequence
US7684632B2 (en) 2005-05-16 2010-03-23 Hewlett-Packard Development Company, L.P. Estimating image compression quantization parameter values
US8422546B2 (en) 2005-05-25 2013-04-16 Microsoft Corporation Adaptive video encoding using a perceptual model
DE102005025629A1 (de) 2005-06-03 2007-03-22 Micronas Gmbh Bildverarbeitungsverfahren zur Reduzierung von Blocking-Artefakten
CN101253777A (zh) 2005-07-01 2008-08-27 极速决件公司 用于在多媒体信号编码中使用的方法、装置和系统
KR100667806B1 (ko) 2005-07-07 2007-01-12 삼성전자주식회사 영상 부호화 및 복호화 방법 및 장치
US20070009042A1 (en) 2005-07-08 2007-01-11 Robert Craig Video game system using pre-encoded macro-blocks in an I-frame
AU2006269728B2 (en) 2005-07-11 2011-11-03 Interdigital Madison Patent Holdings Method and apparatus for macroblock adaptive inter-layer intra texture prediction
US20070147497A1 (en) 2005-07-21 2007-06-28 Nokia Corporation System and method for progressive quantization for scalable image and video coding
WO2007018670A1 (en) 2005-07-21 2007-02-15 Thomson Licensing Method and apparatus for weighted prediction for scalable video coding
EP1746839A1 (en) 2005-07-22 2007-01-24 Thomson Licensing Method and apparatus for encoding video data
US20070025441A1 (en) 2005-07-28 2007-02-01 Nokia Corporation Method, module, device and system for rate control provision for video encoders capable of variable bit rate encoding
EP1911278A2 (en) 2005-08-04 2008-04-16 Nds Limited Advanced digital tv system
US20070053603A1 (en) 2005-09-08 2007-03-08 Monro Donald M Low complexity bases matching pursuits data coding and decoding
US8879856B2 (en) 2005-09-27 2014-11-04 Qualcomm Incorporated Content driven transcoder that orchestrates multimedia transcoding using content information
EP1775958A1 (en) 2005-10-14 2007-04-18 Thomson Licensing Method and apparatus for reconstructing the texture of a spatial enhancement-layer video picture
US7778476B2 (en) 2005-10-21 2010-08-17 Maxim Integrated Products, Inc. System and method for transform coding randomization
US8023569B2 (en) 2005-12-15 2011-09-20 Sharp Laboratories Of America, Inc. Methods and systems for block-based residual upsampling
US7889790B2 (en) 2005-12-20 2011-02-15 Sharp Laboratories Of America, Inc. Method and apparatus for dynamically adjusting quantization offset values
KR100867995B1 (ko) 2006-01-07 2008-11-10 한국전자통신연구원 동영상 데이터 인코딩/디코딩 방법 및 그 장치
CN103957409B (zh) * 2006-01-09 2017-12-29 马蒂亚斯·纳罗施克 编码方法和解码方法、编码器和解码器
JP4795223B2 (ja) 2006-01-31 2011-10-19 キヤノン株式会社 画像処理装置
BRPI0621340A2 (pt) 2006-02-13 2011-12-06 Toshiba Kk Toshiba Corp método e aparelho e programa de codificação/decodificação de vìdeo
JP4529919B2 (ja) 2006-02-28 2010-08-25 日本ビクター株式会社 適応量子化装置及び適応量子化プログラム
EP1993292B1 (en) 2006-03-09 2013-05-15 NEC Corporation Dynamic image encoding method and device and program using the same
CN101317458B (zh) 2006-03-16 2012-04-18 华为技术有限公司 在编码过程中实现自适应量化的方法及装置
US8848789B2 (en) 2006-03-27 2014-09-30 Qualcomm Incorporated Method and system for coding and decoding information associated with video compression
US8130828B2 (en) 2006-04-07 2012-03-06 Microsoft Corporation Adjusting quantization to preserve non-zero AC coefficients
US8059721B2 (en) 2006-04-07 2011-11-15 Microsoft Corporation Estimating sample-domain distortion in the transform domain with rounding compensation
US7995649B2 (en) 2006-04-07 2011-08-09 Microsoft Corporation Quantization adjustment based on texture level
US7974340B2 (en) 2006-04-07 2011-07-05 Microsoft Corporation Adaptive B-picture quantization control
JP2007281949A (ja) 2006-04-07 2007-10-25 Matsushita Electric Ind Co Ltd 画像符号化装置、画像符号化復号システム、画像符号化方法、および画像符号化復号方法
US20070237237A1 (en) 2006-04-07 2007-10-11 Microsoft Corporation Gradient slope detection for video compression
US8503536B2 (en) 2006-04-07 2013-08-06 Microsoft Corporation Quantization adjustments for DC shift artifacts
JP4062711B2 (ja) 2006-04-17 2008-03-19 俊宏 南 動画像符号化装置
US20070268964A1 (en) 2006-05-22 2007-11-22 Microsoft Corporation Unit co-location-based motion estimation
EP1871113A1 (en) 2006-06-20 2007-12-26 THOMSON Licensing Method and apparatus for encoding video enhancement layer with multiresolution color scalability
JP4908943B2 (ja) 2006-06-23 2012-04-04 キヤノン株式会社 画像符号化装置及び画像符号化方法
US7840078B2 (en) 2006-07-10 2010-11-23 Sharp Laboratories Of America, Inc. Methods and systems for image processing control based on adjacent block characteristics
US8120660B2 (en) 2006-07-10 2012-02-21 Freescale Semiconductor, Inc. Image data up sampling
US7885471B2 (en) 2006-07-10 2011-02-08 Sharp Laboratories Of America, Inc. Methods and systems for maintenance and use of coded block pattern information
US8253752B2 (en) 2006-07-20 2012-08-28 Qualcomm Incorporated Method and apparatus for encoder assisted pre-processing
US8773494B2 (en) 2006-08-29 2014-07-08 Microsoft Corporation Techniques for managing visual compositions for a multimedia conference call
JP2008099045A (ja) 2006-10-13 2008-04-24 Nippon Telegr & Teleph Corp <Ntt> スケーラブル符号化方法,復号方法,これらの装置,およびこれらのプログラム並びにその記録媒体
US9014280B2 (en) 2006-10-13 2015-04-21 Qualcomm Incorporated Video coding with adaptive filtering for motion compensated prediction
US20080095235A1 (en) 2006-10-20 2008-04-24 Motorola, Inc. Method and apparatus for intra-frame spatial scalable video coding
JP4575344B2 (ja) 2006-10-24 2010-11-04 アップル インコーポレイテッド 縮小サイズまたはフルサイズでの再生を動的に選択的に行うための複数の独立した符号化チェーンを備えるビデオ符号化システム
US7885476B2 (en) 2006-12-14 2011-02-08 Sony Corporation System and method for effectively performing an adaptive encoding procedure
US8199812B2 (en) 2007-01-09 2012-06-12 Qualcomm Incorporated Adaptive upsampling for scalable video coding
US8238424B2 (en) 2007-02-09 2012-08-07 Microsoft Corporation Complexity-based adaptive preprocessing for multiple-pass video compression
US20080240257A1 (en) 2007-03-26 2008-10-02 Microsoft Corporation Using quantization bias that accounts for relations between transform bins and quantization bins
US8498335B2 (en) 2007-03-26 2013-07-30 Microsoft Corporation Adaptive deadzone size adjustment in quantization
US8243797B2 (en) 2007-03-30 2012-08-14 Microsoft Corporation Regions of interest for quality adjustments
US8442337B2 (en) 2007-04-18 2013-05-14 Microsoft Corporation Encoding adjustments for animation content
TW200845723A (en) 2007-04-23 2008-11-16 Thomson Licensing Method and apparatus for encoding video data, method and apparatus for decoding encoded video data and encoded video signal
US8331438B2 (en) 2007-06-05 2012-12-11 Microsoft Corporation Adaptive selection of picture-level quantization parameters for predicted video pictures
US7983496B2 (en) 2007-06-26 2011-07-19 Mitsubishi Electric Research Laboratories, Inc. Inverse tone mapping for bit-depth scalable image coding adapted to variable block sizes
US20090161756A1 (en) 2007-12-19 2009-06-25 Micron Technology, Inc. Method and apparatus for motion adaptive pre-filtering
US8160132B2 (en) 2008-02-15 2012-04-17 Microsoft Corporation Reducing key picture popping effects in video
US8542730B2 (en) 2008-02-22 2013-09-24 Qualcomm, Incorporated Fast macroblock delta QP decision
US8953673B2 (en) 2008-02-29 2015-02-10 Microsoft Corporation Scalable video coding and decoding with sample bit depth and chroma high-pass residual layers
US8189933B2 (en) 2008-03-31 2012-05-29 Microsoft Corporation Classifying and controlling encoding quality for textured, dark smooth and smooth video content
US9338475B2 (en) 2008-04-16 2016-05-10 Intel Corporation Tone mapping for bit-depth scalable video codec
US8897359B2 (en) 2008-06-03 2014-11-25 Microsoft Corporation Adaptive quantization for enhancement layer video coding
CN103202020B (zh) * 2011-07-29 2017-02-08 太阳专利托管公司 动态图像解码方法以及动态图像解码装置
US10218976B2 (en) * 2016-03-02 2019-02-26 MatrixView, Inc. Quantization matrices for compression of video

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06189287A (ja) * 1992-12-15 1994-07-08 Sony Corp 画像符号化装置、画像符号化方法、画像復号化装置、および画像復号化方法
CN1526236A (zh) * 2001-07-12 2004-09-01 �ű�ʵ������֤��˾ 用于改善压缩图像色度信息的方法和系统
JP2005524304A (ja) * 2002-04-23 2005-08-11 ノキア コーポレイション ビデオ符号化システムにおける量子化器パラメータを表示するための方法および装置
CN1672177A (zh) * 2002-07-30 2005-09-21 高通股份有限公司 数据压缩和解压缩中的参数选择
CN1512785A (zh) * 2002-12-27 2004-07-14 ���ǵ�����ʽ���� 基于离散余弦变换的高级视频编码方法和设备
CN105847826A (zh) * 2006-05-05 2016-08-10 微软技术许可有限责任公司 灵活量化

Also Published As

Publication number Publication date
JP2014209790A (ja) 2014-11-06
IL194133A (en) 2013-03-24
CA2647332A1 (en) 2007-11-15
RU2619908C2 (ru) 2017-05-19
CN101438591A (zh) 2009-05-20
RU2008143599A (ru) 2010-05-10
US20180359475A1 (en) 2018-12-13
US20120224627A1 (en) 2012-09-06
US20140233638A1 (en) 2014-08-21
RU2476000C2 (ru) 2013-02-20
RU2012156159A (ru) 2014-06-27
US11863749B2 (en) 2024-01-02
JP2009536506A (ja) 2009-10-08
US20220248021A1 (en) 2022-08-04
US20220248022A1 (en) 2022-08-04
US8588298B2 (en) 2013-11-19
EP2016773B1 (en) 2021-03-31
US8184694B2 (en) 2012-05-22
US11343503B2 (en) 2022-05-24
CN105847826B (zh) 2019-03-22
AU2007248524A1 (en) 2007-11-15
WO2007130580A3 (en) 2008-02-14
US10602146B2 (en) 2020-03-24
KR20090015037A (ko) 2009-02-11
IL194133A0 (en) 2009-08-03
CN105847826A (zh) 2016-08-10
JP5385781B2 (ja) 2014-01-08
US9967561B2 (en) 2018-05-08
US20220256153A1 (en) 2022-08-11
HK1133144A1 (en) 2010-03-12
CA2647332C (en) 2017-03-21
CN102833545A (zh) 2012-12-19
BRPI0710704B1 (pt) 2020-09-29
US11843775B2 (en) 2023-12-12
US11778186B2 (en) 2023-10-03
EP2016773A4 (en) 2011-09-28
US20220256154A1 (en) 2022-08-11
US8711925B2 (en) 2014-04-29
CN102833545B (zh) 2016-08-17
MX2008013647A (es) 2008-11-04
JP2017063486A (ja) 2017-03-30
BRPI0710704A2 (pt) 2011-08-23
JP6054920B2 (ja) 2016-12-27
US20070258518A1 (en) 2007-11-08
KR101477302B1 (ko) 2014-12-30
CN101438591B (zh) 2012-10-10
JP2013153525A (ja) 2013-08-08
HK1179084A1 (zh) 2013-09-19
IL225132A (en) 2014-07-31
WO2007130580A2 (en) 2007-11-15
US20210185319A1 (en) 2021-06-17
AU2007248524B2 (en) 2012-03-08
EP2016773A2 (en) 2009-01-21
US10958907B2 (en) 2021-03-23
CN105812815A (zh) 2016-07-27
CN105915906A (zh) 2016-08-31
US20070258519A1 (en) 2007-11-08
JP5580447B2 (ja) 2014-08-27
US11778187B2 (en) 2023-10-03
US20200221091A1 (en) 2020-07-09

Similar Documents

Publication Publication Date Title
CN105812815B (zh) 灵活量化
CN101617539B (zh) 基于变换的数字媒体编解码器中的计算复杂度和精度控制
AU2006280178B2 (en) Prediction of transform coefficients for image compression

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant