发明名称 |
DYNAMIC IMAGE CODING DEVICE |
摘要 |
<p>PURPOSE:To reduce the scale of hardware for a mode discrimination section by using a prediction error already calculated for motion prediction for the discrimination of the inter-frame coding mode and the in-frame coding mode, thereby eliminating circuits for sum of products arithmetic operation having been required for a conventional coder. CONSTITUTION:In-frame blocks X are fed to an image input terminal 1 in a prescribed sequence, and fed to a subtractor 2, in which the block X is taken of a difference from a prediction block P whose motion is predicted and calculated based on a reference image stored in a prediction section 11 and from which an inter-frame difference block E is outputted in the order of a prescribed image. A control section 4 receives the block X and a predicted error PE from the prediction section 11 and compares a predicted error based on the error PE and an in-frame random quantity to code the block X or the block E through the control of a changeover device 3. The selected block E is given to a coding section 5, from which coded data Y are given to a multiplexer 6 and a decoding section 8.</p> |
申请公布号 |
JPH07203449(A) |
申请公布日期 |
1995.08.04 |
申请号 |
JP19930338474 |
申请日期 |
1993.12.28 |
申请人 |
SHARP CORP |
发明人 |
FUJIWARA YOICHI;MIYAKE TOSHIYUKI;KATADA HIROYUKI;AONO TOMOKO;KUSAO HIROSHI |
分类号 |
H04N19/50;G06T9/00;H04N19/107;H04N19/136;H04N19/137;H04N19/14;H04N19/176;H04N19/186;H04N19/196;H04N19/42;H04N19/423;H04N19/46;H04N19/503;H04N19/51;H04N19/61;H04N19/625;H04N19/70;H04N19/91;(IPC1-7):H04N7/32 |
主分类号 |
H04N19/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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