PICTURE ENCODER, PICTURE DECODER, PICTURE ENCODING METHOD, PICTURE DECODING METHOD, AND MEDIUM

Title:

PICTURE ENCODER, PICTURE DECODER, PICTURE ENCODING METHOD, PICTURE DECODING METHOD, AND MEDIUM

Document Type and Number:

WIPO Patent Application WO/1998/005159

Kind Code:

A1

Abstract:

A picture encoder which is provided with a dynamic range estimating means (10101) which obtains a dynamic range from a multi-pixel picture to be encoded, a dynamic range encoding means (10105) which encodes the dynamic range and outputs the range as encoded dynamic range data, a smoothing function estimating means (10102) which estimates a smoothing function from the multi-pixel picture, a multi/binary pixel converting means (10103) which converts the multi-pixel picture into a binary picture based on the multi/binary pixel converting standard corresponding to the smoothing function, a binary picture encoding means (10104) which encodes the binary picture and outputs the picture as encoded binary picture data, and a smoothing function encoding means (10106) which encodes the smoothing function and outputs the function as encoded smoothing function data. Therefore, the multi-pixel picture can be encoded efficiently.

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Inventors:

HATA KOICHI (JP)
ETOH MINORU (JP)
ANKEI TAKESHI (JP)

Application Number:

PCT/JP1997/002591

Publication Date:

February 05, 1998

Filing Date:

July 25, 1997

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
HATA KOICHI (JP)
ETOH MINORU (JP)
ANKEI TAKESHI (JP)

International Classes:

G06T9/00; H04N1/417; H04N1/411; H04N1/415; H04N7/26; H04N7/50; (IPC1-7): H04N1/417

Foreign References:

JPH07254990A	1995-10-03
JPH02274080A	1990-11-08
JPH0265371A	1990-03-06
JPH08140085A	1996-05-31

Other References: