发明名称 |
System omfattande åtminstone en enkoder för kodning av en digital signal och åtminstone en dekoder för dekodning av en kodad signal samt en enkoder och dekoder för bruk i systemet |
摘要 |
Known systems based on layered video coding and video decoding code with inadequate efficiency because the new high-resolution picture is predicted by means of the switching means present in the system either on the basis of the preceding high-resolution picture or on the basis of the instantaneous low-resolution picture. According to the invention, designing the switching means for the adjustment of the ratio of the signal representing the preceding high-resolution picture and the signal representing the instantaneous low-resolution picture and for then adding both the adjusted signals achieves a gain of 3 dB in the prediction with the correct ratio, and this results in an improvement in the coding efficiency. <IMAGE> |
申请公布号 |
FI108597(B) |
申请公布日期 |
2002.02.15 |
申请号 |
FI19930004018 |
申请日期 |
1993.09.14 |
申请人 |
KONINKLIJKE PTT NEDERLAND N.V., |
发明人 |
HEKSTRA,ANDRIES PIETER;KOSTER,ARIAN;SCHINKEL,DOLF ALBERT |
分类号 |
H03M7/36;G06T9/00;H03M7/38;H04N7/26;H04N7/50;(IPC1-7):H04N7/24 |
主分类号 |
H03M7/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|