IMAGE ENCODER - MITSUBISHI ELECTRIC CORP

Title:

IMAGE ENCODER

Document Type and Number:

WIPO Patent Application WO/2000/042775

Kind Code:

A1

Abstract:

The receiving side can reproduce media data irrespective of the quality state of the line. Differential motion vector limiting section (10) counts the events where (1) is inputted as the quality state (9) of the line every unit time by means of a built-in timer, holds the counts, refers to the counts in units of one picture according to the position information (22) about an inputted macro block to be encoded, and determines differential motion vector limiting information (11) on the basis of the counts referred to. A motion compensation predicting section (12) calculates a differential motion vector, compares it with the differential motion vector limiting information (11), replaces the differential motion vector with the differential motion vector limiting information (11) if the differential motion vector exceeds the differential motion vector limiting information (11), thereby limiting the differential motion vector and outputting a motion vector (21) to a VLC section (20).

Inventors:

KURODA SHINICHI (JP)
OGAWA FUMINOBU (JP)
SEKIGUCHI SHUNICHI (JP)
ASAI KOHTARO (JP)
HASEGAWA YURI (JP)
MURAKAMI TOKUMICHI (JP)

Application Number:

PCT/JP2000/000159

Publication Date:

July 20, 2000

Filing Date:

January 17, 2000

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
KURODA SHINICHI (JP)
OGAWA FUMINOBU (JP)
SEKIGUCHI SHUNICHI (JP)
ASAI KOHTARO (JP)
HASEGAWA YURI (JP)
MURAKAMI TOKUMICHI (JP)

International Classes:

H04N19/107; G06T9/00; H04N7/24; H04N19/139; H04N19/172; H04N19/176; H04N19/196; H04N19/50; H04N19/503; H04N19/51; H04N19/593; H04N19/61; H04N19/625; H04N19/895; H04N19/91; H04N21/6377; H04N21/658; (IPC1-7): H04N7/32

Foreign References:

JPH06339139A	1994-12-06
JPH08289251A	1996-11-01
JPH0537918A	1993-02-12
EP0851685A2	1998-07-01

Other References: