发明名称 |
System comprising at least one encoder for coding a digital signal and at least one decoder for decoding a digital signal, and encoder and decoder for use in the system according to the invention |
摘要 |
Known systems based on layered coding and decoding do not take account of the greater surface area of an HDTV picture, which is to be coded with high resolution, compared with the smaller surface area of a conventional picture, to be derived therefrom, which is to be coded with low resolution. An improvement in the efficiency of the coding and decoding is achieved by actually taking account of this with the system according to the invention and maintaining the coupling between the two layers in the encoder and the decoder if a picture element is situated in a corresponding section of the two pictures and interrupting the coupling if a picture element is situated outside the corresponding section of the two pictures.
|
申请公布号 |
US5510787(A) |
申请公布日期 |
1996.04.23 |
申请号 |
US19930119740 |
申请日期 |
1993.09.10 |
申请人 |
KONINKLIJKE PTT NEDERLAND N.V. |
发明人 |
KOSTER, ARIAN |
分类号 |
H04N7/30;G06T9/00;H04N7/26;H04N7/50;(IPC1-7):H04N11/02 |
主分类号 |
H04N7/30 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|