公开(公告)号：EP1578134A1

公开(公告)日：2005-09-21

申请号：EP04006490.9

申请日：2004-03-18

Applicant: STMicroelectronics S.r.l.

Inventor： Vitali, Andrea Lorenzo ,  Rovati, Fabrizio Simone ,  Della Torre, Luigi ,  Celetto, Luca

IPC: H04N7/26

CPC classification number: H04N19/94 ,  H04N19/39

Abstract: A method for encoding and/or decoding video signals, including the operations of generating at a transmitter side a multiple descriptions vector ( d → ) associated to a pixel values vector ( p → ) of the video signals and decoding at a receiver side available descriptions vector ( d → ') for reconstructing the pixel values vector ( p → ). The operation of generating a multiple descriptions vector ( d → ) includes the steps of obtaining the pixel values vector ( p → ) by selecting a group (G) of pixels in a picture (PK) of the video signal and applying an encoding matrix ( M ) to the pixel values vector ( p → ). The decoding operation includes the step of applying, the available descriptions vector ( d → ') in order to obtain the pixel values vector ( p → ) a decoding matrix ( M ') that is in a inversion relationship with the encoding matrix ( M ).

Abstract translation: 一种用于编码和/或解码视频信号的方法，包括在发射机侧生成与视频信号的像素值矢量（p→）相关联的多描述矢量（d→）并且在接收机侧解码可用描述 矢量（d→'）用于重建像素值矢量（p→）。 生成多描述向量（d→）的操作包括通过选择视频信号的图片（PK）中的像素组（G）并将编码矩阵（P） M）映射到像素值向量（p→）。 解码操作包括应用可用描述向量（d→'）以获得与编码矩阵（M）呈反向关系的解码矩阵（M'）的像素值向量（p→）的步骤， 。

公开(公告)号：EP1667461A2

公开(公告)日：2006-06-07

申请号：EP05110313.3

申请日：2005-11-03

Applicant: STMicroelectronics S.r.l.

Inventor： Bruna, Arcangelo Ranieri ,  Celetto, Luca

IPC: H04N7/26

CPC classification number: H04N19/124 ,  H04N19/137 ,  H04N19/14 ,  H04N19/176 ,  H04N19/194 ,  H04N19/45 ,  H04N19/61

Abstract: Described herein is a method for block coding of a flow (I) of data, in particular video data, via a compression operation (100; 200; 300) that comprises: applying to input-data blocks (B, CB; MB) in said data flow (I) a discrete-cosine-transform (DCT) operation (120; 220) and a quantization operation (130; 230) to produce compressed-data blocks (DB); subjecting said compressed-data blocks (DB) to a coding operation (235, 240) to obtain compressed output flows (O); and moreover applying an inverse-quantization operation (190; 290) and an inverse-discrete-cosine-transform (IDCT) operation (195; 295) on said compressed-data blocks (DB) to obtain reconstructed blocks (RB).
The method envisages controlling (1000; 1100) generation of mismatch errors from said input-data blocks (B, CB; MB) via the operations of:

detecting from said input-data blocks (B, CB; MB) and compressed-data blocks (DB) data blocks (DB; MB) that are liable to cause mismatch errors; and
modifying said block (DB; MB) that are liable to cause mismatch errors prior to said coding operation (235, 240).

Abstract translation: 在描述了一种用于数据流（I）的块编码的方法，尤其是视频数据，经由压缩手术确实包括（100; 300; 200）：在施加到输入数据块（B，CB，MB） 所述数据流（I）的离散余弦变换（DCT）运算（120; 220）和一个量化操作（130; 230），以产生压缩数据块（DB）; 使所述压缩数据块（DB）的编码操作（235，240）以获得压缩的输出流（O）; 更超过施加到逆量化操作（190; 290）和在逆离散余弦变换（IDCT）操作（195; 295）在所述压缩数据块（DB），以获得重构的块（RB）。 该方法设想控制（1000; 1100）的生成，从失配误差的说通过的操作输入数据块（B，CB，MB）： - 从所述输入数据块（B，CB，MB）检测和压缩数据 块（DB）的数据块（DB，MB）那样容易引起失配误差; 和 - 修改所述块（DB，MB）并易于之前说引起的失配误差编码手术（235，240）。

公开(公告)号：EP1578131A1

公开(公告)日：2005-09-21

申请号：EP04006491.7

申请日：2004-03-18

Applicant: STMicroelectronics S.r.l.

Inventor： Rovati, Fabrizio Simone ,  Della Torre, Luigi ,  Celetto, Luca ,  Vitali, Andrea Lorenzo

IPC: H04N7/24 ,  H04N7/26 ,  H04N7/64

CPC classification number: H04N21/2662 ,  H04N19/39 ,  H04N19/436 ,  H04N19/587 ,  H04N19/59 ,  H04N19/61 ,  H04N21/234327

Abstract: A method for encoding/decoding a video signal sequence by generating therefrom multiple description subsequences wherein said subsequences are produced by a plurality of parallel video encoding processes (102) based on respective encoding parameters. The method includes the step of commonly controlling (103) said encoding/decoding parameters for said plurality of video encoding/decoding processes (102).

公开(公告)号：EP1231793A1

公开(公告)日：2002-08-14

申请号：EP01830084.8

申请日：2001-02-09

Applicant: STMicroelectronics S.r.l.

Inventor： Graziani, Andrea ,  Celetto, Luca ,  Alfonso, Daniele ,  Basso, Fabrizio ,  Cremonesi, Alessandro ,  Pau, Danilo

IPC: H04N7/26

CPC classification number: H04N19/40 ,  H04N19/90

Abstract: In order to generate, starting from an input MPEG bitstream (IS), an output MPEG bitstream (OS) having at least one entity chosen among syntax, resolution, and bitrate modified with respect to the input bitstream (IS), first portions and second portions are distinguished in the input bitstream (IS), which respectively substantially do not affect and do affect the variation in bitrate. When at least one between the syntax and the resolution is to be modified, the first portions of the input bitstream (IS) are subjected (104) to the required translation, then transferring (134) said first portions subjected to syntax and/or resolution translation to the output bitstream (OS). When the resolution is left unaltered, the second portions are transferred (138) from the input bitstream (IS) to the output bitstream (OS) in the substantial absence of processing operations. When the resolution is changed, the second portions of the input bitstream (IS) are subjected (108 to 130) to a filtering in the domain of the discrete cosine transform (DCT).

Abstract translation: 为了产生，从在输入MPEG位数据流（IS）开始输出MPEG位流（OS）具有至少一个实体选择中的语法，分辨率和比特率相对于输入比特流改性（IS），第一部分和第二 部分是在输入比特流（IS），分别，它们基本上不影响和做影响比特率的变化区别开来。 当语法和分辨率之间的至少一个要被修改，则输入比特流的（IS）的第一部分进行（104）到所需要的翻译，然后转移环（134）所述第一部分进行语法和/或分辨率 翻译到输出比特流（OS）。 当分辨率保持不变，第二部分从输入比特流（IS）在基本上不存在处理操作的输出位流（OS）转印（138）。 当分辨率改变时，输入比特流（IS）的所述第二部分进行（108至130），以过滤在所述离散余弦变换（DCT）的结构域。