| 发明名称 |
Analysis of compression decoded video image sequences |
| 摘要 |
A method of detecting I-frames in a video signal which has previously been MPEG coded, involves taking a DCT and analyzing the frequency of zero value coefficients. An I-frame, which does not utilize prediction coding is expected to have a higher number of zero coefficients than a predicted P- or B-frame.
|
| 申请公布号 |
US6895049(B1) |
申请公布日期 |
2005.05.17 |
| 申请号 |
US20010806967 |
申请日期 |
2001.04.06 |
| 申请人 |
SNELL & WILCOX LIMITED |
发明人 |
KNEE MICHAEL JAMES;POOLE IAN JAMES |
| 分类号 |
H04N7/32;G06T9/00;H03M7/30;H04N7/26;H04N7/50;H04N17/00;(IPC1-7):H04N7/12;H04N7/12 |
主分类号 |
H04N7/32 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
