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公开(公告)号：WO1985001174A1
公开(公告)日：1985-03-14
申请号：PCT/US1984001344
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： ADVANCED MICRO DEVICES, INC. , RALLAPALLI, Krishna , KAKU, Shinkyo
IPC: H04N01/40
Abstract: A high speed picture element generator (13) for use in a digital facsimile receiver for reforming picture elements from decoded facsimile transmission signals. The picture element generator receives the decoded facsimile signals in the form of run length data (12) of sequential color units in a line of picture. An input register (21) of the picture element generator receives the run length data (50) of a color unit, and an output register (28) holds the picture element data. A decoder (30) coupled to the input register (21) generates the picture element data (60) for the output register from the run length data. The decoder (30) is also coupled to the output register so that the generated picture data (60) fills portions of the output register (28) unoccupied by the picture element data of previous color units.
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2.发明申请
公开(公告)号：WO1985001173A1
公开(公告)日：1985-03-14
申请号：PCT/US1984001329
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： ADVANCED MICRO DEVICES, INC. , RALLAPALLI, Krishna , KAKU, Shinkyo
IPC: H04N01/40
CPC classification number: H04N1/4175 , G06T9/005
Abstract: A method and device for decoding two-dimensionally encoded digital facsimile signals. The method includes (a) accumulating the run lengths of color change picture elements in the reference line, (b) decoding a codeword to generate a displacement value, (c) combining the accumulated run length of a reference line color change picture element and a displacement value to obtain accumulated run lengths of coding line color change picture elements, and (d) determining the difference between accumulated run lengths of a coding line color change picture element. The difference is the decoded data. The device has a control logic (70), a reference line processing unit (80) for generating the accumulated run lengths of color change picture elements in the reference line, a coding line processing unit (81) for generating displacement values from the encoded codewords, and a first combining unit part (82) and second combining unit part (83) for combining the reference line accumulated run lengths and the displacement values to obtain the accumulated run lengths of color change picture elements in the coding line and for determining the differences between coding lines accumulated run lengths, which are the decoded run lengths of the color units in the coding line, respectively.
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公开(公告)号：WO1985001172A1
公开(公告)日：1985-03-14
申请号：PCT/US1984001328
申请日：1984-08-20
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： ADVANCED MICRO DEVICES, INC. , RALLAPALLI, Krishna , KAKU, Shinkyo
IPC: H04N01/40
CPC classification number: H04N1/4175 , G06T9/005
Abstract: A method and device for two-dimensionally coding digital facsimile signals, especially for the CCITT T.4 recommended standard. A line of digitized picture elements is coded with respect to a reference line of digitized picture elements. The run lengths of color units previous to color change picture elements in the coding and reference lines are accumulated, and the positions of the color change picture elements in the coding line with respect to the positions of the color change picture elements in the reference line are determined by the differences between the accumulated run lengths of the coding and reference line color change picture element and the reference line color change picture elements. The steps are selectively repeated in predetermined sequences responsive to the value of the accumulated run length differences. The present invention also provides for a facsimile device which has control logic (600) for controlling the operations of the device, accumulated run length generator block (120) sequentially generates accumulated run lengths of each change picture element in the coding line and reference line, logic (502) for determining the differences in the accumulated run lengths of coding and reference line picture elements and an encoder (502) for encoding the difference in accordance with a predetermined code, whereby the control logic (600) responsive to the differences, selectively advances the generators for the accumulated run lengths of the next coding line and reference line change picture elements.
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公开(公告)号：WO1985001171A1
公开(公告)日：1985-03-14
申请号：PCT/US1984001327
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： ADVANCED MICRO DEVICES, INC. , RALLAPALLI, Krishna , KAKU, Shinkyo
IPC: H04N01/40
Abstract: A high speed facsimile device suitable for integration using present day VLSI technology, for encoding binarily digitized picture information into run length codes. The device receives consecutive blocks of digitized picture data. In the device a run length generator unit (30), which is responsive to these consecutive blocks of picture data, generates the run lengths of color units in a data block. A combining unit (13) coupled to the run length generator unit (30) combines the run lengths of color units in more than one data block and an encoding unit (15) coupled to the run length generator unit (30) via the combining unit (13) generates in a pre-determined code, such as the recommended CCITT T.4 standard, the coded run lengths of color units independent of the data blocks.
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公开(公告)号：EP0152479B1
公开(公告)日：1990-10-31
申请号：EP84903310.5
申请日：1984-08-20
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： RALLAPALLI, Krishna , KAKU, Shinkyo
CPC classification number: H04N1/4175 , G06T9/005
Abstract: A method and device for two-dimensionally coding digital facsimile signals, especially for the CCITT T.4 recommended standard. A line of digitized picture elements is coded with respect to a reference line of digitized picture elements. The run lengths of color units previous to color change picture elements in the coding and reference lines are accumulated, and the positions of the color change picture elements in the coding line with respect to the positions of the color change picture elements in the reference line are determined by the differences between the accumulated run lengths of the coding and reference line color change picture element and the reference line color change picture elements. The steps are selectively repeated in predetermined sequences responsive to the value of the accumulated run length differences. The present invention also provides for a facsimile device which has control logic (600) for controlling the operations of the device, accumulated run length generator block (120) sequentially generates accumulated run lengths of each change picture element in the coding line and reference line, logic (502) for determining the differences in the accumulated run lengths of coding and reference line picture elements and an encoder (502) for encoding the difference in accordance with a predetermined code, whereby the control logic (600) responsive to the differences, selectively advances the generators for the accumulated run lengths of the next coding line and reference line change picture elements.
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Patent Agency Ranking
公开(公告)号：EP0152473A1
公开(公告)日：1985-08-28
申请号：EP84903256.0
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： RALLAPALLI, Krishna , KAKU, Shinkyo
Abstract: Dispositif de fac-similé à haute vitesse indiqué pour l'intégration en utilisant l'actuelle technologie VLSI, permettant de coder des informations d'image numérisées en binaire en des codes de longueur de course. Le dispositif reçoit des blocs consécutifs de données d'image numérisées. Dans le dispositif, une unité génératrice de longueurs de course (30), réagissant aux blocs consécutifs de données d'image, produit les longueurs de course des unités de couleur dans un bloc de données. Une unité combinatrice (13) couplée à l'unité génératrice de longueurs de course (30) combine les longueurs de course des unités de couleur en un nombre de blocs de données supérieur à 1, et une unité de codage (15) couplée à l'unité génératrice de longueurs de course (30) par l'intermédiaire de l'unité combinatrice (13) produit selon un code prédéterminé, telle la norme recommandée CCITT T.4, les longueurs de course codées des unités de couleurs indépendantes des blocs de données.
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公开(公告)号：EP0152473B1
公开(公告)日：1990-12-12
申请号：EP84903256.0
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： RALLAPALLI, Krishna , KAKU, Shinkyo
Abstract: A high speed facsimile device suitable for integration using present day VLSI technology, for encoding binarily digitized picture information into run length codes. The device receives consecutive blocks of digitized picture data. In the device a run length generator unit (30), which is responsive to these consecutive blocks of picture data, generates the run lengths of color units in a data block. A combining unit (13) coupled to the run length generator unit (30) combines the run lengths of color units in more than one data block and an encoding unit (15) coupled to the run length generator unit (30) via the combining unit (13) generates in a pre-determined code, such as the recommended CCITT T.4 standard, the coded run lengths of color units independent of the data blocks.
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公开(公告)号：EP0152480B1
公开(公告)日：1990-05-23
申请号：EP84903315.4
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： RALLAPALLI, Krishna , KAKU, Shinkyo
Abstract: A high speed picture element generator (13) for use in a digital facsimile receiver for reforming picture elements from decoded facsimile transmission signals. The picture element generator receives the decoded facsimile signals in the form of run length data (12) of sequential color units in a line of picture. An input register (21) of the picture element generator receives the run length data (50) of a color unit, and an output register (28) holds the picture element data. A decoder (30) coupled to the input register (21) generates the picture element data (60) for the output register from the run length data. The decoder (30) is also coupled to the output register so that the generated picture data (60) fills portions of the output register (28) unoccupied by the picture element data of previous color units.
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9.发明授权
公开(公告)号：EP0153397B1
公开(公告)日：1990-07-11
申请号：EP84903257.8
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： RALLAPALLI, Krishna , KAKU, Shinkyo
CPC classification number: H04N1/4175 , G06T9/005
Abstract: A method and device for decoding two-dimensionally encoded digital facsimile signals. The method includes (a) accumulating the run lengths of color change picture elements in the reference line, (b) decoding a codeword to generate a displacement value, (c) combining the accumulated run length of a reference line color change picture element and a displacement value to obtain accumulated run lengths of coding line color change picture elements, and (d) determining the difference between accumulated run lengths of a coding line color change picture element. The difference is the decoded data. The device has a control logic (70), a reference line processing unit (80) for generating the accumulated run lengths of color change picture elements in the reference line, a coding line processing unit (81) for generating displacement values from the encoded codewords, and a first combining unit part (82) and second combining unit part (83) for combining the reference line accumulated run lengths and the displacement values to obtain the accumulated run lengths of color change picture elements in the coding line and for determining the differences between coding lines accumulated run lengths, which are the decoded run lengths of the color units in the coding line, respectively.
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公开(公告)号：EP0153397A1
公开(公告)日：1985-09-04
申请号：EP84903257.0
申请日：1984-08-17
Applicant: ADVANCED MICRO DEVICES, INC.
Inventor： RALLAPALLI, Krishna , KAKU, Shinkyo
CPC classification number: H04N1/4175 , G06T9/005
Abstract: Procédé et dispositif de décodage de signaux numériques de fac-similé codés de manière bidimensionnelle. Le procédé consiste a) à accumuler les longueurs de course des éléments d'image de changement de couleur dans la ligne de référence, b) à décoder un mot de code pour produire une valeur de déplacement, c) à combiner la longueur de course accumulée d'un élément d'image de changement de couleur dans la ligne de référence et une valeur de déplacement pour obtenir les longueurs de course cumulatives des éléments d'image de changement de couleur dans la ligne de codage, et d) à déterminer la différence entre les longueurs de course cumulatives d'un élément d'image de changement de couleur dans la ligne de codage. La différence est égale aux données décodées. Le dispositif possède une logique de commande (70), une unité de traitement de ligne de référence (80) produisant les longueurs de course cumulatives des éléments d'image de changement de couleur dans la ligne de référence, une unité de traitement de ligne de codage (81) produisant des valeurs de déplacement à partir des mots de code codés, ainsi qu'une première partie d'unité combinatrice (82) et une deuxième partie d'unité combinatrice (83) servant à combiner les longueurs de course cumulatives dans la ligne de référence et les valeurs de déplacement pour obtenir les longueurs de course cumulatives des éléments d'image de changement de couleur dans la ligne de codage et pour déterminer les différences entre les longueurs de course cumulatives dans la ligne de codage, qui sont respectivement les longueurs de course décodées des unités de couleur dans la ligne de codage.
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