JPS6436178A - Decoder for picture block code signal - Google Patents

Decoder for picture block code signal

Info

Publication number
JPS6436178A
JPS6436178A JP19002887A JP19002887A JPS6436178A JP S6436178 A JPS6436178 A JP S6436178A JP 19002887 A JP19002887 A JP 19002887A JP 19002887 A JP19002887 A JP 19002887A JP S6436178 A JPS6436178 A JP S6436178A
Authority
JP
Japan
Prior art keywords
distortion
block
circuit
elimination
decoder
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
JP19002887A
Other languages
Japanese (ja)
Other versions
JP2793586B2 (en
Inventor
Masaaki Takizawa
Yuji Izawa
Junichi Kimura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP19002887A priority Critical patent/JP2793586B2/en
Publication of JPS6436178A publication Critical patent/JPS6436178A/en
Application granted granted Critical
Publication of JP2793586B2 publication Critical patent/JP2793586B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Image Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To simplify the elimination circuit for block distortion by applying distortion elimination only to a picture element at a border of blocks where distortion is especially remarkable and displaying other elements as they are. CONSTITUTION:A distortion elimination circuit 5 applies low pass filtering with a characteristic to a picture signal decoded by a decoding circuit 2, a switch 6 is thrown upward position only when the picture elements at the outer circumference of a block are outputted and the distortion elimination circuit is sent to a D/A conversion circuit 3. In other cases, the output of the decoding circuit 2 is sent to the D/A conversion circuit 3 as it is. Thus, only the picture elements on the outer circumference of the block where block distortion is especially remarkable are eliminated for the distortion and the block distortion caused by the block coding is reduced by the addition of a simple circuit.
JP19002887A 1987-07-31 1987-07-31 Image block code signal decoding apparatus Expired - Lifetime JP2793586B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19002887A JP2793586B2 (en) 1987-07-31 1987-07-31 Image block code signal decoding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19002887A JP2793586B2 (en) 1987-07-31 1987-07-31 Image block code signal decoding apparatus

Publications (2)

Publication Number Publication Date
JPS6436178A true JPS6436178A (en) 1989-02-07
JP2793586B2 JP2793586B2 (en) 1998-09-03

Family

ID=16251169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19002887A Expired - Lifetime JP2793586B2 (en) 1987-07-31 1987-07-31 Image block code signal decoding apparatus

Country Status (1)

Country Link
JP (1) JP2793586B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346482A (en) * 1989-07-14 1991-02-27 Kokusai Denshin Denwa Co Ltd <Kdd> Method and apparatus for eliminating block distortion for moving picture coding
JPH04318784A (en) * 1991-04-18 1992-11-10 Matsushita Electric Ind Co Ltd Signal processing method and recording/reproducing device
JPH0514735A (en) * 1991-07-01 1993-01-22 Kubota Corp Picture processor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63104586A (en) * 1986-10-21 1988-05-10 Sony Corp Decoding device for block coded picture signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63104586A (en) * 1986-10-21 1988-05-10 Sony Corp Decoding device for block coded picture signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346482A (en) * 1989-07-14 1991-02-27 Kokusai Denshin Denwa Co Ltd <Kdd> Method and apparatus for eliminating block distortion for moving picture coding
JPH04318784A (en) * 1991-04-18 1992-11-10 Matsushita Electric Ind Co Ltd Signal processing method and recording/reproducing device
JPH0514735A (en) * 1991-07-01 1993-01-22 Kubota Corp Picture processor

Also Published As

Publication number Publication date
JP2793586B2 (en) 1998-09-03

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