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EP0625853A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Moving image encoder and decoder

Assignee: NTT Inc
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Filing: 1994-05-20
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Granted: —
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Expires: 2014-05-20
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Abstract

Abstract A moving image encoder comprising: a contour extractor for dividing a local decoded image into a plurality of segments, and extracting contour information therein for each of an n number of frames, n being a natural number, in which encoding has been completed; a motion parameter extractor for extracting a set of motion parameters based on the contour information for each of an n number of frames in which encoding has been completed; a motion compensator for forming a prediction image based on the local decoded image, the contour information, and the set of motion parameters for each of an n number of frames in which encoding has been completed; an encoder for forming encoded information by means of quantizing a differential signal of the prediction image with a present frame; a local decoder for adding the prediction image to a signal formed by inverse quantization of the encoded information, forming a local decoded image, and storing this local decoded image into frame memory; and a transmitting unit for transmitting the encoded information and the set of motion parameters for each of an n number of frames in which encoding has been completed. The remote decoder works with a similar prediction loop.

Inventors

  • 👤 Hiroshi Watanabe

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 23:13
CPC Classifications
G; G06; G06T; G06T9/00; G06T9/20; H; H04; H04N; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/537; H04N19/543; H04N19/60; H04N19/61; H04N19/20; H04N19/30

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 207 words
A moving image encoder comprising: a contour extracting means for dividing a local decoded image into a plurality of segments and extracting contour information from said a plurality of segments therein for each of an n number of frames, n being a natural number, in which encoding has been completed; a motion parameter extracting means for extracting a set of motion parameters based on said contour information for each of an n number of frames in which encoding has been completed; a motion compensation means for forming a prediction image based on said local decoded image, said contour information, and said set of motion parameters for each of an n number of frames in which encoding has been completed; an encoding means for forming encoded information by means of quantizing a differential signal of said prediction image with a present frame; a local decoding means for adding said prediction image to a signal formed by inverse quantization of said encoded information, forming a local decoded image from said signal, and storing said local decoded image into frame memory; and a transmission means for transmitting said encoded information and said set of motion parameters for each of an n number of frames in which encoding has been completed.
Claim 2
Dependent Claim 77 words
A moving image encoder as mentioned in claim 1 wherein, said encoding means is constructed such that a differential signal of a present frame and said prediction image is transformed and quantized to form encoded information; and said local decoding means is constructed such that said prediction image is added to a signal formed by inverse quantization and inverse transform of said encoded information to form a local decoded image, which is then stored into frame memory.
Claim 3
Dependent Claim 23 words
A moving image encoder as mentioned in claim 1 further comprising an interpolation means for performing an interpolation operation on said prediction image.
Claim 4
Dependent Claim 22 words
A moving image encoder as mentioned in claim 1 further comprising an overlap processing means for processing overlap of said prediction image.
Claim 5
Dependent Claim 29 words
A moving image encoder as mentioned in claim 1 wherein, said motion compensating means is constructed such that a brightness or contrast is corrected to form a prediction image.
Claim 6
Dependent Claim 142 words
A moving image decoder comprising: a receiving means for receiving encoded information and motion parameters for each of an n number of frames, n being a natural number, in which encoding has been completed; a contour extracting means for dividing each decoded image into a plurality of segments and extracting contour information from said a plurality of segments therein for each of an n number of frames in which encoding has been completed; a motion compensation means for forming a prediction image based on said decoded image, said contour information, and said motion parameters for each of an n number of frames in which encoding has been completed; a decoding means for adding said prediction image to a signal formed by inverse quantization of said encoded information, forming a decoded image from said signal, and storing said decoded image into frame memory.
Claim 7
Dependent Claim 48 words
A moving image decoder as mentioned in claim 6 wherein, said decoding means is constructed such that said prediction image is added to a signal formed by inverse quantization and inverse transform of said encoded information to form a decoded image, which is then stored into frame memory.
Claim 8
Dependent Claim 23 words
A moving image decoder as mentioned in claim 6 further comprising an interpolation means for performing an interpolation operation on said prediction image.
Claim 9
Dependent Claim 21 words
A moving image decoder as mentioned in claim 6 further comprising an overlap processing means for overlap processing said prediction image.
Claim 10
Dependent Claim 29 words
A moving image decoder as mentioned in claim 6 wherein, said motion compensation means is constructed such that a brightness or contrast is corrected to form a prediction image.

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