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Patent Searching and Data


Title:
PICTURE CODING DEVICE AND PICTURE NOISE ELIMINATION DEVICE
Document Type and Number:
Japanese Patent JPH0678296
Kind Code:
A
Abstract:

PURPOSE: To obtain a coder in which a motion compensation circuit is not doubly used for a picture noise elimination circuit and a picture compression coding circuit, the light weight of a camera is realized and the information generating quantity of the picture coder is reduced by eliminating noise for a contour emphasis band.

CONSTITUTION: The coder is provided with a motion compensation circuit 9 selecting a small block closest to small blocks in a proper range of a pattern of one preceding frame or field for a small block of a pattern of an input picture signal, a difference circuit 1 taking a difference between the small block of the input picture signal and a small block selected by the motion compensation circuit 9, an orthogonal transformation circuit 2 applying orthogonal transformation to the difference signal of the difference circuit 1, and a quantization processing circuit 4 quantizing an output of the orthogonal transformation circuit 2, and also provided with a coefficient suppression circuit 3 suppressing a conversion coefficient of the orthogonal transformation circuit 2 equivalent to the contour emphasis band at a threshold level after the orthogonal transformation circuit 2.


Inventors:
KUWABARA TORU
Application Number:
JP1993000068441
Publication Date:
March 18, 1994
Filing Date:
March 26, 1993
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H04N5/208; G06T5/00; G06T9/00; H04N5/21; H04N7/30; H04N7/32; H04N11/04; (IPC1-7): H04N7/137; G06F15/66; G06F15/68; H04N5/208; H04N5/21; H04N7/133; H04N11/04
Attorney, Agent or Firm:
Takada Mamoru