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US5402248A
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Image encoding apparatus and method
Assignee: Canon Inc
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Filing: 1993-04-01
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Granted: 1995-03-28
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Expires: 2013-04-01
Abstract
Abstract An image processing apparatus is provided which can shape codes and omit buffers at a decoding side as well as omit an image memory at an encoding side by providing code buffers for respective encoders. An image encoding apparatus for encoding image information in a hierarchical form includes encoders provided for respective hierarchies and code buffers provided after the respective encoders. Furthermore, it is possible to use a common code buffer memory for respective hierarchies at the encoding side. In such a case, by arranging so that a hierarchical tag can identify to which hierarchy a code belongs, a simplified encoding apparatus is provided.
Inventors
- 👤 Mamoru Sato
- 👤 Hidefumi Osawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:48
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/41
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
124 words
An image encoding apparatus, comprising: input means for inputting image data; first reduction means for reducing the input image data and for generating first reduced image data; first encoding means for encoding the input image data in accordance with the first reduced image data and for outputting first encoded image data; second reduction means for reducing the first reduced image data and for generating second reduced image data; and second encoding means for encoding the first reduced image data in accordance with the second reduced image data and for outputting second encoded image data, wherein said input means, said first reduction means, said second reduction means, said first encoding means and said second encoding means operate in parallel on different pixels of image data.
Claim 2
Dependent Claim
124 words
An image encoding apparatus, comprising: input means for inputting image data; first reduction means for reducing the input image data and for generating first reduced image data; first encoding means for encoding the input image data in accordance with the first reduced image data and for outputting first encoded image data; second reduction means for reducing the first reduced image data and for generating second reduced image data; and second encoding means for encoding the first reduced image data in accordance with the second reduced image data and for outputting second encoded image data, wherein said input means, said first reduction means, said second reduction means, said first encoding means and said second encoding means operate in parallel on different pixels of image data.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1, further comprising: first delay means for delaying the input image data; and second delay means for delaying the first reduced image data.
Claim 4
Dependent Claim
19 words
An apparatus according to claim 1, further comprising memory means for storing the first and second encoded image data.
Claim 5
Dependent Claim
14 words
An apparatus according to claim 3, wherein said memory means comprises a single device.
Claim 6
Dependent Claim
20 words
An apparatus according to claim 1, further comprising transmission means for sequentially transmitting the second and first encoded image data.
Claim 7
Dependent Claim
27 words
An apparatus according to claim 1, wherein said first and second reduction means reduce image data using a plurality of pixels from different lines of an image.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 1, wherein said first and second encoding means encode image data using an arithmetic encoding method.
Claim 9
Dependent Claim
21 words
An apparatus according to claim 1, further comprising tag means for adding tags to the first and second encoded image data.
Claim 10
Dependent Claim
20 words
An apparatus according to claim 1, wherein said input means comprises an image scanning apparatus including a photoelectric conversion device.
Claim 11
Dependent Claim
14 words
An apparatus according to claim 1, wherein said input means comprises a host computer.
Claim 12
Dependent Claim
60 words
An apparatus according to claim 1, further comprising third encoding means for encoding the second reduced image data and for generating third encoded image data, wherein said third encoding means operates in parallel with said input means, said first reduction means, said second reduction means, said first encoding means and said second encoding means on different pixels of image data.
Claim 13
Dependent Claim
105 words
An image encoding method, comprising the steps of: inputting image data; reducing the input image data to generate first reduced image data; encoding the input image data in accordance with the first reduced image data and outputting first encoded image data; reducing the first reduced image data to generate second reduced image data; and encoding the first reduced image data in accordance with the second reduced image data and outputting second encoded image data, wherein said inputting step, said first reducing step, said second reducing step, said first encoding step and said second encoding step are performed in parallel for different pixels of image data.
Claim 14
Dependent Claim
105 words
An image encoding method, comprising the steps of: inputting image data; reducing the input image data to generate first reduced image data; encoding the input image data in accordance with the first reduced image data and outputting first encoded image data; reducing the first reduced image data to generate second reduced image data; and encoding the first reduced image data in accordance with the second reduced image data and outputting second encoded image data, wherein said inputting step, said first reducing step, said second reducing step, said first encoding step and said second encoding step are performed in parallel for different pixels of image data.
Claim 15
Dependent Claim
23 words
A method according to claim 12, further comprising the steps of: delaying the input image data; and delaying the first reduced image data.
Claim 16
Dependent Claim
22 words
A method according to claim 12, further comprising the step of storing the first and second encoded image data in a memory.
Claim 17
Dependent Claim
24 words
A method according to claim 14, wherein said storing step further comprises storing the first and second encoded image data in a single device.
Claim 18
Dependent Claim
20 words
A method according to claim 12, further comprising the step of sequentially transmitting the second and first encoded image data.
Claim 19
Dependent Claim
29 words
A method according to claim 12, wherein in said first and second reducing steps, image data are reduced using a plurality of pixels from different lines of an image.
Claim 20
Dependent Claim
23 words
A method according to claim 12, wherein in said first and second encoding steps, image data are encoded using an arithmetic encoding method.
Claim 21
Dependent Claim
21 words
A method according to claim 12, further comprising the step of adding tags to the first and second encoded image data.
Claim 22
Dependent Claim
22 words
A method according to claim 12, wherein said inputting step is performed by an image scanning apparatus including a photoelectric conversion device.
Claim 23
Dependent Claim
16 words
An apparatus according to claim 12, wherein said inputting step is performed by a host computer.
Claim 24
Dependent Claim
61 words
An image encoding method according to claim 12, further comprising the step of encoding the second reduced image data and outputting third encoded image data, wherein said third encoding step is performed in parallel with said inputting step, said first encoding step, said second encoding step, said first reducing step and said second reducing step for different pixels of image data.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |