| Patent Number |
Title Of Patent |
Date Issued |
| 7541948 |
Variable length coding method and variable length decoding method |
June 2, 2009 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero c |
| 7515635 |
Moving picture coding method and a moving picture decoding method |
April 7, 2009 |
| A moving picture coding apparatus includes a motion estimation unit for performing motion estimation by fixing the one of two reference pictures as a reference picture indicated by an inputted default reference picture number DefRefNo and a variable length coding unit for performing vari |
| 7505518 |
Picture encoding method and image decoding method |
March 17, 2009 |
| In a picture coding method for generating a coded signal corresponding to each picture by coding a plurality of coded signals, a switching picture which is capable of switching a plurality of coded signals and subsequent pictures of the switching picture can refer to only a group of pict |
| 7492952 |
Moving picture coding method and moving picture decoding method |
February 17, 2009 |
| According to a picture coding method of the present invention, a coded picture identified by a picture number is stored, as a reference picture, into a storage unit; commands indicating correspondence between picture numbers and reference indices for designating reference pictures and |
| 7411526 |
Variable length coding method and variable length decoding method |
August 12, 2008 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero c |
| 7394853 |
Motion vector coding method and motion vector decoding method |
July 1, 2008 |
| A motion vector coding method and apparatus that improves efficiency of coding motion vectors when a current block is coded using a plurality of motion vectors. The apparatus includes a motion vector coding unit that codes a motion vector inputted from a motion vector detecting unit. A |
| 7362807 |
Motion vector coding method and motion vector decoding method |
April 22, 2008 |
| A motion vector coding unit 117 executes processing including a neighboring block specification step (S100) of specifying a neighboring block which is located in the neighborhood of a current block; a judgment step (Steps S102, S104) of judging whether or not the neighboring block ha |
| 7339506 |
Variable length coding method and variable length decoding method |
March 4, 2008 |
| An image coding apparatus is provided with a unit operable to scan a two-dimensional array of quantized coefficients into scanned quantized coefficients, the scanning being performed from a low frequency component toward a high frequency component; a unit operable to convert the scanned |
| 7327788 |
Motion vector derivation method, dynamic image encoding method, and dynamic image decoding metho |
February 5, 2008 |
| A motion vector derivation unit (11) includes a comparison unit (20) for comparing a parameter TR1 for a reference vector with a predetermined value to determine whether it exceeds the predetermined value or not; a switching unit (21) for switching selection between the maximum value of |
| 7312731 |
Variable length coding method and variable length decoding method |
December 25, 2007 |
| An image decoding apparatus is provided with a unit operable to receive coded data including a coded run value and a coded level value, wherein the coded run value is obtained by coding a run value which indicates the number of continuous quantized coefficients, each having a zero value, |
| 7312730 |
Variable length coding method and variable length decoding method |
December 25, 2007 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero c |
| 7308149 |
Picture coding method and picture decoding method |
December 11, 2007 |
| The method includes the following units: a coefficient number detecting unit (109) for detecting the number of coefficients which has a value other than 0 for each block according to the generated coefficient, a coefficient number storing unit (110) for storing the number of coeffici |
| 7308145 |
Moving picture coding method and moving picture decoding method |
December 11, 2007 |
| According to a picture coding method of the present invention, a coded picture identified by a picture number is stored, as a reference picture, into a storage unit; commands indicating correspondence between picture numbers and reference indices for designating reference pictures and |
| 7308144 |
Picture coding method and picture decoding method |
December 11, 2007 |
| The method includes the following units: a coefficient number detecting unit (109) for detecting the number of coefficients which has a value other than 0 for each block according to the generated coefficient, a coefficient number storing unit (110) for storing the number of coeffici |
| 7308143 |
Picture coding method and picture decoding method |
December 11, 2007 |
| The method includes the following units: a coefficient number detecting unit (109) for detecting the number of coefficients which has a value other than 0 for each block according to the generated coefficient, a coefficient number storing unit (110) for storing the number of coeffici |
| 7305134 |
Picture coding method and picture decoding method |
December 4, 2007 |
| The method includes the following units: a coefficient number detecting unit (109) for detecting the number of coefficients which has a value other than 0 for each block according to the generated coefficient, a coefficient number storing unit (110) for storing the number of coeffici |
| 7305035 |
Variable length encoding method and variable length decoding method |
December 4, 2007 |
| A variable length coding method is provided for coding coefficients in each block which are obtained by performing frequency transformation on picture data of a moving picture per block having a predetermined size, and includes: a coefficient scanning step of scanning the coefficients in |
| 7283071 |
Variable length coding method and variable length decoding method |
October 16, 2007 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero c |
| 7221803 |
Picture coding method and picture decoding method |
May 22, 2007 |
| An image coding method and an image decoding method is provided by which an image can be restored correctly even if part of memory management information is lost by a transmission channel error, a candidate of a reference image that can be referred to is selected more appropriately, |
| 7218787 |
Picture coding method and picture decoding method |
May 15, 2007 |
| An image coding method and an image decoding method is provided by which an image can be restored correctly even if part of memory management information is lost by a transmission channel error, a candidate of a reference image that can be referred to is selected more appropriately, |
| 7206347 |
Image coding method and image decoding method |
April 17, 2007 |
| A picture encoding method of the present invention is a picture encoding method of predictively encoding an input picture with reference to pictures stored in a picture buffer, decoding the encoded input picture, judging whether or not the decoded picture is a picture for reference and |
| 7184598 |
Picture coding method and picture decoding method |
February 27, 2007 |
| The method includes the following units: a coefficient number detecting unit (109) for detecting the number of coefficients which has a value other than 0 for each block according to the generated coefficient, a coefficient number storing unit (110) for storing the number of coeffici |
| 7167591 |
Image encoding method and image decoding method |
January 23, 2007 |
| The present invention provides an image coding method and an image decoding method by which an image can be restored correctly even if part of memory management information is lost by a transmission channel error, a candidate of a reference image that can be referred to is selected more |
| 7161508 |
Variable length coding method and variable length decoding method |
January 9, 2007 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero c |
| 7109898 |
Variable length coding method and variable length decoding method |
September 19, 2006 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero c |
| 7095896 |
Image encoding method and image decoding method |
August 22, 2006 |
| The method includes the following units: a coefficient number detecting unit (109) for detecting the number of coefficients which has a value other than 0 for each block according to the generated coefficient, a coefficient number storing unit (110) for storing the number of coeffici |
| 6992605 |
Variable length coding method and variable length decoding method |
January 31, 2006 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero c |
| 6967600 |
Variable length coding method and variable length decoding method |
November 22, 2005 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero coeff |
| 6954157 |
Variable length coding method and variable length decoding method |
October 11, 2005 |
| An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero coeff |
