| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the video hierarchy encoder that employs frame thining by which image information is transmitted with high efficiency. SOLUTION: A basic hierarchy encoder 11 has a frame skip control device inside and it conducts the frame skip control according to prescribed algorithm. An extended hierarchy encoder 12 calculates a frame rate (c) based on an information amount produced as a result of coding, an output buffer occupancy amount (e), and informs a coding object frame decision device 14 of it. The encoding object frame decision device 14 obtains a means frame interval based on the frame rate fed from both the coders 11, 12 to decide a coding object frame (d). The extended hierarchical coder 12 encodes the decided frame to select at least a frame of one layer so as not to be in duplicate with subordinate hierarchical frames.</p> |
