JPS553276A - Signal suppressing transmission system - Google Patents

Signal suppressing transmission system

Info

Publication number
JPS553276A
JPS553276A JP7605478A JP7605478A JPS553276A JP S553276 A JPS553276 A JP S553276A JP 7605478 A JP7605478 A JP 7605478A JP 7605478 A JP7605478 A JP 7605478A JP S553276 A JPS553276 A JP S553276A
Authority
JP
Japan
Prior art keywords
signal
guard band
divided
synchronous signal
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7605478A
Other languages
Japanese (ja)
Other versions
JPS6150424B2 (en
Inventor
Tatsuo Seki
Kenzo Tatematsu
Yasuhiro Sugino
Hiroyuki Ando
Yoshito Desaki
Yasukazu Nishino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7605478A priority Critical patent/JPS553276A/en
Priority to US06/006,245 priority patent/US4353095A/en
Priority to CA000320490A priority patent/CA1141459A/en
Publication of JPS553276A publication Critical patent/JPS553276A/en
Publication of JPS6150424B2 publication Critical patent/JPS6150424B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Facsimile Transmission Control (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE: To prevent lowering of the picture quality, to reduce the length of the synchronous signal and also to facilitate an easy detection of the synchronous signal by deciding the state for the guard band which is divided based on the information of the picture information blocks adjacent to the guard band.
CONSTITUTION: Reading part 1 reads out the picture information and sends stores it in line memory 2, and the synchronous signals are generated from synchronous signal generator 3. Then the picture information is divided into blocks through signal processor 4, and the guard bands are generated through setting circuits 5∼8. Each guard band signal is then divided into two parts, and the first-half and the second-half guard band signals are turned into the black or white signal based on the one to several bits of the picture information of the adjacent preceding block and the adjacent next block respectively. Furthermore, the black signal of one to several bits is provided at the center when both the first and second divided guard band signals are white signals. As a result, the lowering of the picture quality can be prevented, at the same time reducing the length of the synchronous signal and facilitating the detection of the synchronous signal.
COPYRIGHT: (C)1980,JPO&Japio
JP7605478A 1978-01-31 1978-06-22 Signal suppressing transmission system Granted JPS553276A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP7605478A JPS553276A (en) 1978-06-22 1978-06-22 Signal suppressing transmission system
US06/006,245 US4353095A (en) 1978-01-31 1979-01-24 Facsimile bandwidth compression method system and apparatus
CA000320490A CA1141459A (en) 1978-01-31 1979-01-30 Facsimile bandwidth compression method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7605478A JPS553276A (en) 1978-06-22 1978-06-22 Signal suppressing transmission system

Publications (2)

Publication Number Publication Date
JPS553276A true JPS553276A (en) 1980-01-11
JPS6150424B2 JPS6150424B2 (en) 1986-11-04

Family

ID=13594056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7605478A Granted JPS553276A (en) 1978-01-31 1978-06-22 Signal suppressing transmission system

Country Status (1)

Country Link
JP (1) JPS553276A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50118453A (en) * 1974-03-04 1975-09-17
JPS6241796U (en) * 1985-09-02 1987-03-12

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50118453A (en) * 1974-03-04 1975-09-17
JPS5551837B2 (en) * 1974-03-04 1980-12-26
JPS6241796U (en) * 1985-09-02 1987-03-12
JPH0350151Y2 (en) * 1985-09-02 1991-10-25

Also Published As

Publication number Publication date
JPS6150424B2 (en) 1986-11-04

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