ES2040499T3 - Dispositivo mejorado para la codificacion por transformada cosinusoidal de videosenales digitales. - Google Patents

Dispositivo mejorado para la codificacion por transformada cosinusoidal de videosenales digitales.

Info

Publication number
ES2040499T3
ES2040499T3 ES198989830208T ES89830208T ES2040499T3 ES 2040499 T3 ES2040499 T3 ES 2040499T3 ES 198989830208 T ES198989830208 T ES 198989830208T ES 89830208 T ES89830208 T ES 89830208T ES 2040499 T3 ES2040499 T3 ES 2040499T3
Authority
ES
Spain
Prior art keywords
subject
digital
block
videosenales
cosinusoidal
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.)
Expired - Lifetime
Application number
ES198989830208T
Other languages
English (en)
Inventor
Mario Stroppiana
Luigi Ronchetti
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.)
Rai Radiotelevisione Italiana SpA
Original Assignee
Rai Radiotelevisione Italiana SpA
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 Rai Radiotelevisione Italiana SpA filed Critical Rai Radiotelevisione Italiana SpA
Application granted granted Critical
Publication of ES2040499T3 publication Critical patent/ES2040499T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
    • H04N19/82—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation involving filtering within a prediction loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

LA SEÑAL DE VIDEO DIGITAL ES DESCOMPUESTA EN BLOQUES DE INTRACAMPO CADA UNO DE LOS CUALES COMPRENDE UN NUMERO DE ELEMENTOS DE IMAGEN ADYACENTES Y CADA BLOQUE DE INTRACAMPO O DE INTERCAMPO O BLOQUE DE INTERMARCO ES SUJETO A UN TRANSFORMADOR DE COSENO DISCRETO (DCT) Y LA SEÑAL TRANSFORMADA ES APLICADA A UN CUANTIFICADOR PARA GENERAR UNA SEÑAL CUANTIFICADA QUE ESTA ENCODIFICADA A UNA LONGITUD VARIABLE Y CARGADA A UN NIVEL SEPARADOR DE TRANSMISION, LA RESOLUCION DE LA CUANTIFICACION ES INVERSAMENTE PROPORCIONAL A LA PROPORCION DE DESCARGA DEL NIVEL SEPARADOR. DE ACUERDO A LA INVENCION UN FILTRO DIGITAL ES CONECTADO PARA FILTRAR EL BLOQUE QUE VA A ESTAR SUJETO A LA DCT Y ES SUJETO AL NIVEL SEPARADOR DE MANERA QUE LA FRECUENCIA SUPERIOR CORTA LAS INFERIORES COMO EL NIVEL SEPARADOR DESCARGA LA CANTIDAD DE INCREMENTO.
ES198989830208T 1989-05-12 1989-05-12 Dispositivo mejorado para la codificacion por transformada cosinusoidal de videosenales digitales. Expired - Lifetime ES2040499T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89830208A EP0396846B1 (en) 1989-05-12 1989-05-12 Improved device for dct encoding of digital video signals

Publications (1)

Publication Number Publication Date
ES2040499T3 true ES2040499T3 (es) 1993-10-16

Family

ID=8203217

Family Applications (1)

Application Number Title Priority Date Filing Date
ES198989830208T Expired - Lifetime ES2040499T3 (es) 1989-05-12 1989-05-12 Dispositivo mejorado para la codificacion por transformada cosinusoidal de videosenales digitales.

Country Status (6)

Country Link
US (1) US5005076A (es)
EP (1) EP0396846B1 (es)
JP (1) JPH0364188A (es)
CA (1) CA2012641C (es)
DE (1) DE68906259T2 (es)
ES (1) ES2040499T3 (es)

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JPH0832047B2 (ja) * 1989-04-28 1996-03-27 日本ビクター株式会社 予測符号化装置
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US5453786A (en) * 1990-07-30 1995-09-26 Mpr Teltech Ltd. Method and apparatus for image data processing
JP2549013B2 (ja) * 1990-10-08 1996-10-30 日本ビクター株式会社 データ圧縮装置
JP2860970B2 (ja) * 1991-02-04 1999-02-24 富士通株式会社 画像符号化装置
JPH0530493A (ja) * 1991-07-24 1993-02-05 Sony Corp デイジタルビデオ信号の復号化装置
KR100255528B1 (ko) * 1991-10-31 2000-05-01 요트.게.아. 롤페즈 디지탈 텔레비젼 영상을 송신기에서 수신기로 송신하기 위한 텔레비젼 시스템
SE9103381L (sv) * 1991-11-15 1993-03-08 Televerket Foerfarande och apparat foer bildkodning med val av steghoejd i kvantiseraren
SE468736B (sv) * 1991-11-15 1993-03-08 Televerket Foerfarande och apparat foer bildkodning med oeverhoppning av bilder och/eller komponenter
US5806072A (en) * 1991-12-20 1998-09-08 Olympus Optical Co., Ltd. Electronic imaging apparatus having hierarchical image data storage structure for computer-compatible image data management
JP2636622B2 (ja) * 1992-03-13 1997-07-30 松下電器産業株式会社 ビデオ信号の符号化方法及び復号化方法ならびにビデオ信号の符号化装置及び復号化装置
JP2558996B2 (ja) * 1992-07-21 1996-11-27 松下電器産業株式会社 画像符号化方法及び画像符号化装置
US5325125A (en) * 1992-09-24 1994-06-28 Matsushita Electric Corporation Of America Intra-frame filter for video compression systems
US5982437A (en) * 1992-10-26 1999-11-09 Sony Corporation Coding method and system, and decoding method and system
JPH0828876B2 (ja) * 1993-02-25 1996-03-21 日本電気株式会社 動画像信号のリフレッシュ方法
EP0679031B1 (en) * 1993-11-08 2001-08-22 Sony Corporation Encoding and decoding picture signals
JPH07135653A (ja) * 1993-11-12 1995-05-23 Nec Corp 画像符号化装置
JPH07177511A (ja) * 1993-12-17 1995-07-14 Nec Corp 画像符号化装置
US5600375A (en) * 1994-09-08 1997-02-04 Intel Corporation Rendering an inter verses intra video encoding decision based upon a vertical gradient measure of target video frames
JP3082585B2 (ja) * 1994-09-09 2000-08-28 富士ゼロックス株式会社 画像情報符号化処理装置、画像情報復号化処理装置及び画像情報符号化復号化処理装置
FI97495C (fi) * 1995-02-06 1996-12-27 Nokia Technology Gmbh Menetelmä kuvan terävöittämiseksi
US5959872A (en) * 1996-10-28 1999-09-28 Samsung Electronics Co., Ltd. Apparatus and method for bidirectional scanning of video coefficients
KR100522121B1 (ko) * 1997-12-17 2006-01-12 삼성전자주식회사 버퍼상태에 따른 dct계수를 제한하는 mpeg인코더
US6873368B1 (en) 1997-12-23 2005-03-29 Thomson Licensing Sa. Low noise encoding and decoding method
US7162097B1 (en) * 2001-05-29 2007-01-09 Cisco Technology, Inc. Methods and apparatus for transform coefficient filtering
US6763070B1 (en) * 2001-05-29 2004-07-13 Cisco Technology, Inc. Methods and apparatus for selecting a cut-off index
US7054362B1 (en) 2001-05-29 2006-05-30 Cisco Technology, Inc. Methods and apparatus for updating a reduction ratio
US6912255B2 (en) * 2002-05-30 2005-06-28 Mobixell Netwoks Inc. Bit rate control through selective modification of DCT coefficients
MXPA04002265A (es) * 2002-07-11 2004-06-29 Matsushita Electric Ind Co Ltd Metodo de determinacion de resistencia de filtracion, metodo de codificacion de pelicula y metodo de decodificacion de pelicula.
US20060062478A1 (en) * 2004-08-16 2006-03-23 Grandeye, Ltd., Region-sensitive compression of digital video
US7634148B2 (en) * 2005-01-07 2009-12-15 Ntt Docomo, Inc. Image signal transforming and inverse-transforming method and computer program product with pre-encoding filtering features
JP2010009624A (ja) * 2009-10-07 2010-01-14 Ntt Docomo Inc 画像信号変換方法、画像信号逆変換方法、画像符号化装置、画像復号装置、画像符号化方法、画像復号方法、画像符号化プログラム、及び、画像復号プログラム
CN115103190A (zh) * 2022-06-14 2022-09-23 晶晨芯半导体(成都)有限公司 编码器码率控制方法及模块、芯片、电子设备和存储介质

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JPS5244512A (en) * 1975-10-06 1977-04-07 Nippon Telegr & Teleph Corp <Ntt> Between-frame coding equipment
JPS56152386A (en) * 1980-04-25 1981-11-25 Oki Electric Ind Co Ltd Coding system of picture signal
US4723161A (en) * 1985-03-20 1988-02-02 Nec Corporation Method and arrangement of coding digital image signals utilizing interframe correlation
DE3678029D1 (de) * 1985-04-17 1991-04-18 Siemens Ag Verfahren zur bilddatenreduktion fuer digitale fernsehsignale.
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US4941043A (en) * 1988-06-14 1990-07-10 Siemens Aktiengesellschaft Method for reducing blocking artifacts in video scene coding with discrete cosine transformation (DCT) at a low data rate
JPH0832047B2 (ja) * 1989-04-28 1996-03-27 日本ビクター株式会社 予測符号化装置

Also Published As

Publication number Publication date
DE68906259D1 (de) 1993-06-03
JPH0364188A (ja) 1991-03-19
EP0396846A1 (en) 1990-11-14
US5005076A (en) 1991-04-02
EP0396846B1 (en) 1993-04-28
CA2012641A1 (en) 1990-11-12
CA2012641C (en) 1995-08-15
DE68906259T2 (de) 1993-12-09

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