Patent US4630124A successfully refreshed from Google Patents.
US4630124A
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Quality selectable facsimile image coding system
Assignee: KDDI Corp
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Filing: 1984-12-11
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Granted: 1986-12-16
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Expires: 2004-12-11
Abstract
Abstract A facsimile signal coding system is disclosed, in which initial encoding is performed for detecting, from picture elements forming a facsimile picture signal, picture elements at intervals of DELTA X picture elements on every DELTA Yth line and encoding the detected picture elements. Encoding of mode 1 is carried out for encoding, by referring to four of the encoded picture elements, a picture element surrounded by the reference picture elements and lying centrally thereof. Encoding of mode 2 is performed by encoding, by referring to four picture elements encoded by the initial encoding and the encoding of mode 1, a picture element surrounded by the four picture elements lying above and below it and on its left and right. The initial encoding and the encoding of mode 1 and mode 2 are effected using 2n (where n is an integer) as an initial value of each of the DELTA X and DELTA Y and thereafter the encoding operations of mode 1 and mode 2 are repeated with the values of the DELTA X and DELTA Y reduced by half.
Inventors
- 👤 Toshiaki Endoh
- 👤 Yasuhiro Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:56
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/41; H04N1/411; H04N1/413; H04N1/417; H04N1/4172
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
234 words
A facsimile signal coding system, comprising: initial encoding means for detecting, from picture elements forming a facsimile picture signal, picture elements at intervals of ΔX picture elements on every ΔYth line and for encoding the detected picture elements; encoding means of mode 1 associated with the initial encoding means for encoding, by referring to four reference picture elements of the picture elements encoded by the initial encoding means, a picture element surrounded by the four reference picture elements and lying centrally thereof; encoding means of mode 2 associated with the initial encoding means and the encoding means of mode 1 for encoding, by referring to four picture elements encoded by the initial encoding means and the encoding means of mode 1, a picture element surrounded by the four picture elements lying above, below, left and right the instant picture element to be encoded; and means associated with the initial encoding means, the encoding of mode 1 and encoding means of mode 2 to control them so that the initial encoding and the encoding of mode 1 and 2 are effected using 2 n (where n is an integer) as an initial value of each of the ΔX and ΔY and thereafter the encoding operation of mode 1 and mode 2 are repeated with the values of the ΔX and ΔY reduced by half up to obtaining a condition where n is equal to one.
Claim 2
Dependent Claim
234 words
A facsimile signal coding system, comprising: initial encoding means for detecting, from picture elements forming a facsimile picture signal, picture elements at intervals of ΔX picture elements on every ΔYth line and for encoding the detected picture elements; encoding means of mode 1 associated with the initial encoding means for encoding, by referring to four reference picture elements of the picture elements encoded by the initial encoding means, a picture element surrounded by the four reference picture elements and lying centrally thereof; encoding means of mode 2 associated with the initial encoding means and the encoding means of mode 1 for encoding, by referring to four picture elements encoded by the initial encoding means and the encoding means of mode 1, a picture element surrounded by the four picture elements lying above, below, left and right the instant picture element to be encoded; and means associated with the initial encoding means, the encoding of mode 1 and encoding means of mode 2 to control them so that the initial encoding and the encoding of mode 1 and 2 are effected using 2 n (where n is an integer) as an initial value of each of the ΔX and ΔY and thereafter the encoding operation of mode 1 and mode 2 are repeated with the values of the ΔX and ΔY reduced by half up to obtaining a condition where n is equal to one.
Claim 3
Dependent Claim
185 words
A facsimile signal coding method, including the steps of: detecting, from picture element forming a facsimile picture signal, picture elements at intervals of ΔX picture elements on every ΔYth line and initially encoding the detected picture elements; mode 1 encoding, by referring to four reference picture elements of the picture elements encoded by the initial encoding, a picture element surrounded by the four reference picture elements and lying centrally thereof; mode 2 encoding, by referring to four picture elements encoded by the initial encoding means and the encoding means of mode 1, a picture element surrounded by the four picture elements lying above, below, left and right the instant picture element to be encoded; and controlling so that the initial encoding, the mode 1 encoding and mode 2 encoding are effected using 2 n (where n is an integer) as an initial value of each of the ΔX and ΔY and thereafter the encoding operations of mode 1 and mode 2 are repeated with the values of the ΔX and ΔY reduced by half up to obtaining a condition where n is equal to one.
Claim 4
Dependent Claim
185 words
A facsimile signal coding method, including the steps of: detecting, from picture element forming a facsimile picture signal, picture elements at intervals of ΔX picture elements on every ΔYth line and initially encoding the detected picture elements; mode 1 encoding, by referring to four reference picture elements of the picture elements encoded by the initial encoding, a picture element surrounded by the four reference picture elements and lying centrally thereof; mode 2 encoding, by referring to four picture elements encoded by the initial encoding means and the encoding means of mode 1, a picture element surrounded by the four picture elements lying above, below, left and right the instant picture element to be encoded; and controlling so that the initial encoding, the mode 1 encoding and mode 2 encoding are effected using 2 n (where n is an integer) as an initial value of each of the ΔX and ΔY and thereafter the encoding operations of mode 1 and mode 2 are repeated with the values of the ΔX and ΔY reduced by half up to obtaining a condition where n is equal to one.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |