公开(公告)号：EP1578133A1

公开(公告)日：2005-09-21

申请号：EP04006489.1

申请日：2004-03-18

Applicant: STMicroelectronics S.r.l.

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

IPC: H04N7/26 ,  G10L19/02

CPC classification number: G10L19/0208 ,  G10L19/24 ,  H04N19/39 ,  H04N19/59 ,  H04N19/63

Abstract: A method for encoding and decoding media signals, includes the operations of generating at a transmitting side multiple descriptions associated to data of the media signals through a downsampling operation (DS) performed on the data, and decoding at a receiving side the multiple descriptions for reconstructing the data by merging (US) the multiple descriptions. The operation of generating multiple descriptions further includes the operations of obtaining a spectral representation (S) of the data, comprising bands (LS, MS HS) associated to different ranges ((LR, MR HR), the bands (LS, MS HS) being obtained by a suitable quantization operation and comprising at least one highly quantized band (HS), that is subjected to a higher degree of quantization. A scrambling operation (SC, SC') is performed on the spectral representation (S) by moving the at least one highly quantized band (HR) to a different range (LR, MR), the scrambling operation being performed prior the downsampling operation (DS). In decoding, a descrambling operation (DS, DS') is performed before the merging (US) operation on the multiple descriptions. Preferred application is in coding of video signals by using polyphase downsampling (PDMD).

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：EP1574994A1

公开(公告)日：2005-09-14

申请号：EP04354011.1

申请日：2004-03-11

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics S.A.

Inventor： Rovati, Fabrizio Simone ,  Zambotti, Paolo Sergio ,  Mellot, Pascal Jean

IPC: G06T7/20

CPC classification number: G06T7/207

Abstract: A method for estimating motion in a sequence of bidimensional arrays of sampled values (e.g. video frames), includes the step of generating (104; 114) estimated motion vectors having at least one component along at least one reference axis (x, y). Motion estimation is performed with a given resolution (110, 112), and the method includes at least one of:

dynamically varying (110, 112) the resolution between subsequent estimation steps (114), and
if said estimated motion vectors have two components along two reference axes (x, y), selectively varying (110, 112) the resolution of motion estimation independently along said two axes (x, y).

Preferred application is in optical mouse arrangements.

Abstract translation: 一种用于在采样值（例如视频帧）的二维阵列的序列估计运动的方法，包括：生成步骤（104; 114）沿至少一个参考轴线（X，Y），其具有至少一个分量估计的运动向量。 运动估计执行与给定的分辨率（110，112），并且该方法包括以下至少一个：动态地改变（110，112）的后续估计步骤（114）之间的分辨率，并且如果所述估计的运动矢量沿着具有两个部件 两个参考轴（x，y）的选择性地改变（110，112）的运动估计unabhängig的分辨率沿着所述两个轴（X，Y）。 优选的应用是在光学鼠标的安排。