公开(公告)号：DE60236074D1

公开(公告)日：2010-06-02

申请号：DE60236074

申请日：2002-07-02

Applicant: ST MICROELECTRONICS SRL

Inventor： ROVATI FABRIZIO SIMONE ,  BORNEO ANTONIO MARIA ,  PAU DANILO PIETRO

IPC: G06F9/38

公开(公告)号：DE602004008214D1

公开(公告)日：2007-09-27

申请号：DE602004008214

申请日：2004-03-18

Applicant: ST MICROELECTRONICS SRL

Inventor： VITALI ANDREA LORENZO ,  ROVATI FABRIZIO SIMONE ,  DELLA TORRE LUIGI

IPC: H04N7/26 ,  G10L19/02 ,  G10L19/24 ,  H04N7/12 ,  H04N7/46

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：ITTO20040780A1

公开(公告)日：2005-02-09

申请号：ITTO20040780

申请日：2004-11-09

Applicant: ST MICROELECTRONICS SRL

Inventor： ROVATI FABRIZIO SIMONE ,  VITALE ANDREA LORENZO