JPS5588479A - Picture signal coding process system - Google Patents

Picture signal coding process system

Info

Publication number
JPS5588479A
JPS5588479A JP16212478A JP16212478A JPS5588479A JP S5588479 A JPS5588479 A JP S5588479A JP 16212478 A JP16212478 A JP 16212478A JP 16212478 A JP16212478 A JP 16212478A JP S5588479 A JPS5588479 A JP S5588479A
Authority
JP
Japan
Prior art keywords
output
selector
signals
given
quantizer
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
JP16212478A
Other languages
Japanese (ja)
Other versions
JPS6041915B2 (en
Inventor
Masakazu Arisawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16212478A priority Critical patent/JPS6041915B2/en
Publication of JPS5588479A publication Critical patent/JPS5588479A/en
Publication of JPS6041915B2 publication Critical patent/JPS6041915B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To ensure the high compression to the picture signals with addition of a small number of circuits by varying the coding bit number according to the nature of the DC-AC conversion block and then distributing the bit number to each component of the predictive error signals.
CONSTITUTION: The picture input given from terminal 1 is converted into the digital signals through A/D converter 2 and then applied to Hadamard converter 3 to deliver Hadamard conversion output YN. This output YN is applied to one side of subtractor circuit 4, and then output EN of circuit 4 is applied to mode selector 5 and quantizer 6. The absolute value of the predictive error signal is compared with the prescribed threshold level by selector 5. And then the mode division is given to several units of signals which are under the threshold level simultaneously from the low frequency component among the predictive error signals which are given ordering from the low to high frequency components, thus one mode being selected. Then the control is given to the characteristics of quantizer 6 via selector 5, and at the same time the transmission code is produced at coder 7 by the output of selector 5 as well as output ZN of quantizer 6 to be transmitted to the transmission line.
COPYRIGHT: (C)1980,JPO&Japio
JP16212478A 1978-12-26 1978-12-26 Image signal encoding processing method Expired JPS6041915B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16212478A JPS6041915B2 (en) 1978-12-26 1978-12-26 Image signal encoding processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16212478A JPS6041915B2 (en) 1978-12-26 1978-12-26 Image signal encoding processing method

Publications (2)

Publication Number Publication Date
JPS5588479A true JPS5588479A (en) 1980-07-04
JPS6041915B2 JPS6041915B2 (en) 1985-09-19

Family

ID=15748489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16212478A Expired JPS6041915B2 (en) 1978-12-26 1978-12-26 Image signal encoding processing method

Country Status (1)

Country Link
JP (1) JPS6041915B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746545A (en) * 1980-07-04 1982-03-17 Philips Nv Method and device for encoding video signal
JPS5992688A (en) * 1982-11-19 1984-05-28 Fuji Photo Film Co Ltd Adaptive picture compression system
JPS59185469A (en) * 1983-04-04 1984-10-22 Fuji Photo Film Co Ltd Adaptation type picture compressing system
JPS6057770A (en) * 1983-09-08 1985-04-03 Matsushita Electric Ind Co Ltd Method for modulating differential pulse code of picture
JPS61147692A (en) * 1984-12-21 1986-07-05 Nec Corp Data compression/expansion method
JPS6382079A (en) * 1986-09-25 1988-04-12 Nec Corp Method and device for encoding moving picture signal
JPS63111791A (en) * 1986-10-30 1988-05-17 Nec Corp Method and device for coding moving image signal
JPH08237659A (en) * 1984-12-21 1996-09-13 Thomson Grand Public Adaptive decoder for continuous image

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60156513U (en) * 1984-03-28 1985-10-18 ケル株式会社 fiber optic connector

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746545A (en) * 1980-07-04 1982-03-17 Philips Nv Method and device for encoding video signal
JPS5992688A (en) * 1982-11-19 1984-05-28 Fuji Photo Film Co Ltd Adaptive picture compression system
JPH0161278B2 (en) * 1982-11-19 1989-12-27 Fuji Photo Film Co Ltd
JPS59185469A (en) * 1983-04-04 1984-10-22 Fuji Photo Film Co Ltd Adaptation type picture compressing system
JPS6057770A (en) * 1983-09-08 1985-04-03 Matsushita Electric Ind Co Ltd Method for modulating differential pulse code of picture
JPS61147692A (en) * 1984-12-21 1986-07-05 Nec Corp Data compression/expansion method
JPH08237659A (en) * 1984-12-21 1996-09-13 Thomson Grand Public Adaptive decoder for continuous image
JPS6382079A (en) * 1986-09-25 1988-04-12 Nec Corp Method and device for encoding moving picture signal
JPS63111791A (en) * 1986-10-30 1988-05-17 Nec Corp Method and device for coding moving image signal
JPH0545117B2 (en) * 1986-10-30 1993-07-08 Nippon Electric Co

Also Published As

Publication number Publication date
JPS6041915B2 (en) 1985-09-19

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