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EP0333159A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Image data transmission apparatus

Assignee: Sharp Corp
•
Filing: 1989-03-15
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Granted: —
•
Expires: 2009-03-15
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Abstract

Abstract Disclosed is an image data transmission apparatus such as facsimile apparatus, in which a unit quantity of image data is encoded in variable length and transmitted into a transmission line, when the encoded unit quantity of the image data is less than a pre­determined value, false data is added to the encoded unit quantity of the image data so that the transmission time of the unit quantity of the image data may be a first minimum time, and when no image data has been transmitted for a predetermined period on the condition of the transmission line being connected, then the transmission line is off. This improvement comprises: a transmission apparatus main body, and an image reading unit detachably mounted on the transmission apparatus main body; the transmission apparatus main body comprising: a memory for storing the read image data in each unit quantity, and means for transmitting the image data in the unit quantity, and when the image data quantity to be transmitted stored in the memory is less than a predetermined data quantity, false data is added to the unit quantity so that the transmission time of the unit quantity may be a second minimum time exceeding the first minimum time.

Inventors

  • 👤 Matahira Kotani
  • 👤 Masayuki Hachinoda
  • 👤 Motohiko Hayashi
  • 👤 Naomitsu Murata
  • 👤 Mitsunobu Kondo

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 12:27
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/327; H04N1/32795

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 197 words
An image data transmission apparatus, in which a unit quantity of image data is encoded in variable length and transmitted into a transmission line, when the encoded unit quantity of the image data is less than a predetermined value, false data is added to the encoded unit quantity of the image data so that the transmission time of the unit quantity of the image data may be a first minimum time, and when no image data has been transmitted for a predetermined period on the condition of the transmission line being connected, then the transmission line is off, wherein the improvement comprises: a transmission apparatus main body, and an image reading unit detachably mounted on the transmission apparatus main body; the transmission appratus main body comprising: a memory for storing the read image data in each unit quantity, and means for transmitting the image data in the unit quantity, and when the image data quantity to be transmitted stored in the memory is less than a predetermined data quantity, false data is added to the unit quantity so that the transmission time of the unit quantity may be a second minimum time exceeding the first minimum time.
Claim 2
Dependent Claim 197 words
An image data transmission apparatus, in which a unit quantity of image data is encoded in variable length and transmitted into a transmission line, when the encoded unit quantity of the image data is less than a predetermined value, false data is added to the encoded unit quantity of the image data so that the transmission time of the unit quantity of the image data may be a first minimum time, and when no image data has been transmitted for a predetermined period on the condition of the transmission line being connected, then the transmission line is off, wherein the improvement comprises: a transmission apparatus main body, and an image reading unit detachably mounted on the transmission apparatus main body; the transmission appratus main body comprising: a memory for storing the read image data in each unit quantity, and means for transmitting the image data in the unit quantity, and when the image data quantity to be transmitted stored in the memory is less than a predetermined data quantity, false data is added to the unit quantity so that the transmission time of the unit quantity may be a second minimum time exceeding the first minimum time.
Claim 3
Dependent Claim 116 words
An image data transmission apparatus according to claim 1, wherein the image reading unit comprises: optical reading means, a rotary roller rotating contacting with the surface of the original from which the image is to be read, and angular disposition detecting means leading out a signal at every predetermined angular disposition of the rotary roller, and for detecting a relative moving state between the image reading unit and the original; and the transmission apparatus main body comprises: control means for storing the image data from the optical reading means into the memory in synchronism with the output of the angular disposition detecting means, and sending out the stored data of this memory as the image data.
Claim 4
Dependent Claim 48 words
An image data transmission apparatus claimed in Claim 2, wherein the optical reading means includes a one-dimensional contact type image sensor, and the image data in the unit quantity is the image data on one scanning line which is read out by the one-dimensional contact type image sensor.

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