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JPS57152787A - Dc/ac conversion coding device for separation signal - Google Patents

Dc/ac conversion coding device for separation signal

Info

Publication number
JPS57152787A
JPS57152787A JP56038942A JP3894281A JPS57152787A JP S57152787 A JPS57152787 A JP S57152787A JP 56038942 A JP56038942 A JP 56038942A JP 3894281 A JP3894281 A JP 3894281A JP S57152787 A JPS57152787 A JP S57152787A
Authority
JP
Japan
Prior art keywords
signal
hadamard
conversion circuit
circuit
coded
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.)
Pending
Application number
JP56038942A
Other languages
Japanese (ja)
Inventor
Kunihiko Mototani
Yoshiya Takemura
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 JP56038942A priority Critical patent/JPS57152787A/en
Publication of JPS57152787A publication Critical patent/JPS57152787A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/04—Colour television systems using pulse code modulation
    • H04N11/042—Codec means
    • H04N11/044—Codec means involving transform coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Systems (AREA)

Abstract

PURPOSE:To compress the band of a decoded signal by providing the entitled device with a memory separating a video signal into plural signal components and storing them, a circuit for Hadamard-converting outputs from the said memory successively and a circuit for quantizing outputs from the said conversion circuit. CONSTITUTION:A video signal is separated into each signal component by a decoder 2 and these components are coded by A/D converters 3, 4, 5, respectively. The coded signals are stored respective memories 40, 41, 42, read out successively and inputted to a Hadamard conversion circuit 43. An Hadamard-converted sequence signals are quantized to the prescribed number of bits by respective quantizing circuits 44, 45, 46, 47 and converted into a series signal by a parallel/series conversion circuit 48. Thus, the band of coded signals can be compressed.
JP56038942A 1981-03-17 1981-03-17 Dc/ac conversion coding device for separation signal Pending JPS57152787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56038942A JPS57152787A (en) 1981-03-17 1981-03-17 Dc/ac conversion coding device for separation signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56038942A JPS57152787A (en) 1981-03-17 1981-03-17 Dc/ac conversion coding device for separation signal

Publications (1)

Publication Number Publication Date
JPS57152787A true JPS57152787A (en) 1982-09-21

Family

ID=12539272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56038942A Pending JPS57152787A (en) 1981-03-17 1981-03-17 Dc/ac conversion coding device for separation signal

Country Status (1)

Country Link
JP (1) JPS57152787A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02215278A (en) * 1989-02-16 1990-08-28 Fuji Photo Film Co Ltd Image signal compressing encoder
JPH0353665A (en) * 1989-07-21 1991-03-07 Fuji Photo Film Co Ltd Picture signal compression coder and decoding reproducer
JPH04181877A (en) * 1990-04-19 1992-06-29 Ricoh Co Ltd Still-picture compressor and method
US5268757A (en) * 1990-06-20 1993-12-07 Kabushiki Kaisha Toshiba High speed imaging apparatus without lowering of dynamic range

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5382126A (en) * 1976-12-27 1978-07-20 Nec Corp Color television coder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5382126A (en) * 1976-12-27 1978-07-20 Nec Corp Color television coder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02215278A (en) * 1989-02-16 1990-08-28 Fuji Photo Film Co Ltd Image signal compressing encoder
JPH0353665A (en) * 1989-07-21 1991-03-07 Fuji Photo Film Co Ltd Picture signal compression coder and decoding reproducer
JPH04181877A (en) * 1990-04-19 1992-06-29 Ricoh Co Ltd Still-picture compressor and method
US5268757A (en) * 1990-06-20 1993-12-07 Kabushiki Kaisha Toshiba High speed imaging apparatus without lowering of dynamic range

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