公开(公告)号：EP1296524A1

公开(公告)日：2003-03-26

申请号：EP01830597.9

申请日：2001-09-20

Applicant: STMicroelectronics S.r.l.

Inventor： Bartolucci, Vilim ,  Pau, Danilo ,  Piccinelli, Emiliano

IPC: H04N7/28 ,  H04N7/50

CPC classification number: G06T9/008 ,  H04N19/124 ,  H04N19/139 ,  H04N19/14 ,  H04N19/15 ,  H04N19/152 ,  H04N19/17 ,  H04N19/174 ,  H04N19/176 ,  H04N19/61 ,  H04N19/94

Abstract: A process for encoding digital video signals (IS) organized in frames (12) comprises the operations of dividing said frames into blocks starting from macroblocks subjected to motion-compensation (13, 14) and applying to said blocks a discrete cosine transform (15) in such a way as to generate respective sets of coefficients. The said sets of coefficients are then assembled (20) by being organized into sets of vectors (X) by means of masking (M 1 , M 2 , M 3 , M 4 ). Once the variance of the vectors has been detected (214), the vectors themselves are quantized (217 to 220) on a number of available bits by means of a pyramid vector quantizer (22), associating to the vectors respective quantization pyramids having given sizes according to the variance detected and to the number of available bits. Finally, the vectors are encoded with respective codewords.

Abstract translation: （IS）组织的一种用于编码数字视频信号处理中的帧（12）包括将所述帧到从经过运动补偿（13，14）的宏块开始，并施加到所述块的离散余弦变换块（15）的操作 在寻求一种方式，以产生respectivement组系数。 系数的所述组，然后通过掩模（M1，M2，M3，M4）的借助于被组织成矢量集（X）的组装（20）。 一旦向量的方差已经检测（214），所述载体本身是由一个金字塔矢量量化器（22）的方式量化（217至220）上的多个可用的位，缔合到载体respectivement量化金字塔具有给定尺寸的 gemäß检测到的方差和可用数位的数目。 最后，将载体与编码码字respectivement。

公开(公告)号：EP0979011A1

公开(公告)日：2000-02-09

申请号：EP98830484.6

申请日：1998-08-06

Applicant: STMicroelectronics S.r.l.

Inventor： Pau, Danilo ,  Bagni, Daniele ,  Pezzoni, Luca

IPC: H04N7/36

CPC classification number: G06F17/30811 ,  H04N5/147 ,  H04N19/105 ,  H04N19/137 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  H04N19/172 ,  H04N19/176 ,  H04N19/179 ,  H04N19/503 ,  H04N19/51 ,  H04N19/577 ,  H04N19/61 ,  H04N19/87

Abstract: The compression and coding of digital data pertaining to video sequences of pictures including motion estimation for removing temporal redundance greatly benefit from an ability to recognize the occurrence of a change of scene in order to command the prediction computation of the pictures using only a forward motion estimation for pictures preceding the change of scene and only a backward motion estimation for picture subsequent the change of scene of a given sequence. According to the method of the invention, a change of scene is reliably detected by checking two distinct indexes. Spurious detections in the event of noisy pictures, zooming and other situations that may affect either one or the other index are prevented.

Abstract translation: 与包括用于去除时间冗余的运动估计的图像的视频序列相关的数字数据的压缩和编码极大地受益于识别场景变化的发生的能力，以便仅使用前向运动估计命令图像的预测计算 对于场景变化之前的图像，以及在给定序列的场景变化之后的图像的后向运动估计。 根据本发明的方法，通过检查两个不同的索引可靠地检测场景的变化。 如果发生嘈杂的图像，变焦和其他可能影响其中一个或其他索引的情况，则会发生杂散检测。

公开(公告)号：EP1081959B1

公开(公告)日：2007-11-14

申请号：EP99830545.2

申请日：1999-09-03

Applicant: STMicroelectronics S.r.l.

Inventor： Pau, Danilo ,  Pezzoni, Luca ,  Rovati, Fabrizio ,  Sirtori, Daniele

IPC: H04N7/26 ,  H04N7/36

CPC classification number: H04N19/105 ,  H04N19/112 ,  H04N19/137 ,  H04N19/85

公开(公告)号：EP1515278A1

公开(公告)日：2005-03-16

申请号：EP03425590.1

申请日：2003-09-11

Applicant: STMicroelectronics S.r.l.

Inventor： Poutet, Bruno ,  Barone, Massimiliano ,  Gardella, Pier Luigi ,  Pau, Danilo

IPC: G06T9/00

CPC classification number: H04N19/90

Abstract: Digital video signals, such as RGB signals, are subjected to processing by ordering the pixels into groups (M) of adjacent pixels (A, B, C, D) and carrying out the operations of:

- i) truncating the respective string of bits, eliminating a given number (n) of least-significant bits, thus generating a respective truncated string;
- ii) adding to the truncated string an integration factor constituted by a power of two of a given order, thus generating a respective integrated string; and
- iii) calculating first and second values of pixel error corresponding to the difference between the respective string and the truncated string and the respective string and the integrated string, respectively.

There is calculated a set of values of global error comprising all the possible combinations of addition of the first and second values of pixel error on the group (M), then locating the value of minimum error in the set of values of global error. Once, in the combination that produces the value of minimum global error, a first and a second number of pixels have been identified whereby the contribution to the value of minimum global error is given by the first value of pixel error and by the second value of pixel error, as a compressed version of the video signals represented by the pixels in the group, there is used a first number of truncated strings and a second number of integrated strings, equal, respectively, to the first number of pixels and to the second number of pixels, with the integrated strings subjected to truncation.

Abstract translation: 数字视频信号（例如RGB信号）通过将像素排列成相邻像素（A，B，C，D）的组（M）进行处理，并执行以下操作：i）截断各个位串 ，消除给定数量（n）个最低有效位，从而产生相应的截断串; - ii）向截断的串中添加由给定次序的两个的幂组成的积分因子，从而生成相应的集成串; 以及 - iii）分别计算与各个字符串和截断的字符串以及相应的字符串和集成字符串之间的差分对应的像素误差的第一和第二值。 计算出一组全局误差的值，包括在组（M）上的像素误差的第一和第二值的相加的所有可能组合，然后将最小误差的值定位在 全局错误。 一旦产生最小全局误差的值的组合中，已经识别出第一和第二数量的像素，由此对最小全局误差值的贡献由像素误差的第一值和第 作为由组中的像素表示的视频信号的压缩版本的像素误差，分别使用第一数量的截断字符串和第二数量的集成字符串，分别等于第一数量的像素和第二数量的像素 像素数，集成的字符串被截断。

公开(公告)号：EP1231794A1

公开(公告)日：2002-08-14

申请号：EP01830227.3

申请日：2001-03-30

Applicant: STMicroelectronics S.r.l.

Inventor： Pau, Danilo ,  Alfonso, Daniele ,  Basso, Fabrizio ,  Piccinelli, Emiliano ,  Cremonesi, Alessandro

IPC: H04N7/26

CPC classification number: H04N19/59 ,  H04N19/40 ,  H04N19/48 ,  H04N19/90

Abstract: A process and a system for generating, starting from an MPEG input bitstream (IS), an MPEG output bitstream (OS), the output bitstream (OS) having a resolution (Hor/N x Vert/M) modified with respect to the resolution (Hor x Vert) of the input bitstream (IS). The process comprises the operations of:

distinguishing (100), in the input bitstream (IS), first portions and second portions which respectively substantially do not affect and do affect the variation of resolution; and
subjecting (114 to 122) said second portions of the input bitstream (IS) to a function of modification of the resolution obtained by filtration in the domain of the discrete cosine transform (DCT), and then transferring (134), to said output bitstream (OS), said second portions subjected to filtering in the domain of the discrete cosine transform.

The invention also relates to the corresponding computer program product.

Abstract translation: 用于从MPEG输入比特流（IS），MPEG输出比特流（OS）开始生成具有相对于分辨率修改的分辨率（Hor / N×Vert / M）的输出比特流（OS）的处理和系统 （Hor×Vert）的输入比特流（IS）。 该过程包括以下操作：在输入比特流（IS）中区分（100）分别基本上不影响并且确实影响分辨率变化的第一部分和第二部分; 并且输入比特流（IS）的所述第二部分（114至122）具有通过在离散余弦变换（DCT）的域中通过滤波获得的分辨率的修改的功能，然后将（134）传送到所述输出 比特流（OS），所述第二部分在离散余弦变换的域中进行滤波。 本发明还涉及相应的计算机程序产品。

公开(公告)号：EP0797353B1

公开(公告)日：2001-11-07

申请号：EP96830134.1

申请日：1996-03-20

Applicant: STMicroelectronics S.r.l.

Inventor： Pau, Danilo

IPC: H04N5/44

CPC classification number: H04N7/0132 ,  H04N9/641 ,  H04N11/046 ,  H04N19/423 ,  H04N19/593 ,  H04N19/61 ,  H04N19/98

公开(公告)号：EP1104198A1

公开(公告)日：2001-05-30

申请号：EP99830713.6

申请日：1999-11-16

Applicant: STMicroelectronics S.r.l.

Inventor： Pau, Danilo ,  Bortot, Luca ,  Sacchi, Maria Luisa

IPC: H04N7/26

CPC classification number: H04N19/40

Abstract: A method of producing an output bitstrcam of coded digital video data, with a bit-rate different from the bit-rate of an input bitstream, includes the steps of

dividing said input bitstream into a sequence of coded data and a sequence of control bits;
modifying said sequence of control bits in function of the different bit-rate of the output bitstream that is desired, producing an output sequence of control bits;
decoding said sequence of coded data producing an intermediate sequence of data;
quantizing with a pre-established step and coding said intermediate sequence of data producing an output sequence of coded data;
merging said output sequences producing said output bitstream with the desired bit-rate.

Abstract translation: 一种以比特率与输入比特流的比特率不同的编码数字视频数据的输出bitstrcam的方法包括以下步骤：将所述输入比特流分成编码数据序列和控制比特序列; 根据期望的输出比特流的不同比特率来修改所述控制比特序列，产生控制比特的输出序列; 解码所述编码数据序列，产生中间数据序列; 用预先建立的步骤进行量化，并对所述中间数据序列进行编码，产生编码数据的输出序列; 将产生所述输出比特流的所述输出序列合并为所需比特率。

公开(公告)号：EP1003336A1

公开(公告)日：2000-05-24

申请号：EP98830689.0

申请日：1998-11-17

Applicant: STMicroelectronics S.r.l.

Inventor： Piccinelli, Emiliano ,  Pezzoni, Luca ,  Pau, Danilo

IPC: H04N7/36

CPC classification number: H04N19/18 ,  H04N19/107 ,  H04N19/112 ,  H04N19/124 ,  H04N19/137 ,  H04N19/139 ,  H04N19/14 ,  H04N19/149 ,  H04N19/152 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/61

Abstract: The efficiency of a method of coding video data according to a standard wherein several types of fields (P, B) beside reference or Intra (I) fields are identified and various coding options exist for said non-Intra fields (P, B) including the removal of temporal redundancy from non-Intra fields (P, B) by way of an algorithm of motion estimation and identification of predictor macroblocks providing the best approximation according to a prediction mode selectable among respective predicting modes of the different types of non-Intra fields (P, B), calculating the discrete cosine transform (DCT) for blocks of data of said macroblocks of data according to a frame mode of decomposition, wherein the blocks are composed of lines of data belonging to a even lines semifield and to a odd lines semifield or in a field mode of decomposition, wherein the blocks are composed of lines of data belonging to the same semifield, quantizing and coding the data resulting from said discrete cosine transform (DCT) carried out by blocks of data to be stored, is increased by operating a choice between field or frame modes and motion comparation or no motion comparation with an algorithm of assessment and comparison of significative complexity indexes of macroblocks.

Abstract translation: 视频数据进行译码雅丁到标准worin几个类型的字段（P，B）的旁边参考或内部（I）字段被识别和各种编码选项的方法的效率为所述非帧内的字段（P，B），包括存在 从非内部字段去除时间冗余的（P，B）通过运动估计和预测器提供雅丁的最佳近似的预测模式的不同类型的非内部的respectivement预测模式之中选择的宏块的识别的算法的方式 字段（P，B），计算离散余弦变换（DCT）用于数据的雅丁分解的帧模式中，所述宏块的数据的块，worin的块由属于偶数行半字段和一个数据行的 奇数行半字段或分解的场模式，worin的块由属于同一个半字段，量化和编码数据从所述得到的离散余弦变换的数据线的 （DCT）由要被存储的数据的块进行的，通过操作场或帧模式和运动或无运动比较 - 比较 - 之间的选择与评估和宏块的复杂性有意义的指标比较的算法增加。

公开(公告)号：EP0944245A1

公开(公告)日：1999-09-22

申请号：EP98830163.6

申请日：1998-03-20

Applicant: STMicroelectronics S.r.l.

Inventor： Piccinelli, Emiliano ,  Pau, Danilo ,  Zuccaro, Amedeo

IPC: H04N5/00 ,  H04N7/36

CPC classification number: H04N19/51 ,  G06T7/207 ,  G06T7/223 ,  H04N19/56

Abstract: By relaying on a temporal correlation among successive pictures beside on a spatial correlation of motion vectors of macroblocks of the currently processed picture and by the use of a hierarchical recursive motion estimation algorithm, the hardware complexity of video coders complying with the MPEG-2 standard can be greatly reduced without an appreciable loss of quality of the video images been transferred.
The method of motion estimation and a hardware embodiment of a coder are described and performance is compared with a prior motion estimation system.

Abstract translation: 通过在当前处理的图像的宏块的运动矢量的空间相关性之间的连续图像之间的时间相关性和通过使用分级递归运动估计算法之间进行中继，根据MPEG-2标准的视频编码器的硬件复杂度可以 大大减少，而不会明显损失已转移视频图像的质量。 描述运动估计的方法和编码器的硬件实施例，并将性能与先前的运动估计系统进行比较。

公开(公告)号：EP0920204B1

公开(公告)日：2006-02-15

申请号：EP97830618.1

申请日：1997-11-24

Applicant: STMicroelectronics S.r.l.

Inventor： Pau, Danilo ,  Bruni, Roberta

IPC: H04N7/00 ,  H04N7/50 ,  H04N7/26 ,  H04N7/28

CPC classification number: G06T9/008 ,  H04N19/428 ,  H04N19/61 ,  H04N19/94