Patent application number | Description | Published |
20080205522 | Moving picture coding method, and moving picture decoding method - A moving picture coding apparatus ( | 08-28-2008 |
20080260035 | Motion vector coding and decoding methods - 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 motion vector for each current block is coded based on a difference between the motion vector and a predicted vector obtained from motion vectors for previously coded neighboring blocks. The predicted vector is generated by one of the following processes: (A) the motion vectors which refer to the same picture are selected from among the motion vectors for the neighboring blocks so as to generate the predicted vector; (B) the motion vectors for the respective neighboring blocks are ordered in the predetermined order, and the motion vectors of the same order rank are selected from the ordered motion vectors so as to generate the predicted vector; and (C) the predicted vector for the second motion vector of the current block shall be the first motion vector, and if the second motion vector and the first motion vector refer to different pictures, the first motion vector is scaled according to the temporal distance between the pictures so as to generate the predicted vector. | 10-23-2008 |
20080260037 | Variable length coding method and variable length decoding method - 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 the block in a predetermined order; and a coding step of coding the coefficients scanned in the coefficient scanning step into variable length codes in a predetermined order by switching a plurality of tables to be used for coding. Here, a direction of switching between the tables may be one-directional. Also, the coding may be non-arithmetic coding. | 10-23-2008 |
20080260038 | Variable length coding method and variable length decoding method - 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 the block in a predetermined order; and a coding step of coding the coefficients scanned in the coefficient scanning step into variable length codes in a predetermined order by switching a plurality of tables to be used for coding. Here, a direction of switching between the tables may be one-directional. Also, the coding may be non-arithmetic coding. | 10-23-2008 |
20080260039 | Variable length coding method and variable length decoding method - 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 the block in a predetermined order; and a coding step of coding the coefficients scanned in the coefficient scanning step into variable length codes in a predetermined order by switching a plurality of tables to be used for coding. Here, a direction of switching between the tables may be one-directional. Also, the coding may be non-arithmetic coding. | 10-23-2008 |
20090034616 | PICTURE CODING METHOD AND PICTURE DECODING METHOD - The method includes the following units: a coefficient number detecting unit ( | 02-05-2009 |
20090135917 | PICTURE CODING METHOD AND PICTURE DECODING METHOD - 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 pictures of the same time in the coded signals. More specifically, the case where picture numbers of an adjacent picture of an S picture and the S picture are not continuous is not considered as an error. | 05-28-2009 |
20090154554 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus | 06-18-2009 |
20090207917 | MOTION VECTOR DERIVATION METHOD, MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A motion vector derivation unit includes a comparison unit for comparing a parameter TR | 08-20-2009 |
20090316789 | DEVICE, METHOD AND PROGRAM FOR GENERATING INTERPOLATION FRAME - An interpolation frame generation device that generates an interpolation frame that interpolates image frames that are obtained by decoding a coded image signal that is coded by motion compensation, includes a motion vector deriving unit and an interpolation frame generating unit. The motion vector deriving unit acquires a motion compensation vector of a coded block that forms the coded image signal. The interpolation frame generating unit generates the interpolation frame in accordance with the motion vector of the image block that forms an image frame by using the motion compensation vector of the coded block as the motion vector of the image block. | 12-24-2009 |
20100014589 | MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus ( | 01-21-2010 |
20100020873 | MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus ( | 01-28-2010 |
20100027656 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus | 02-04-2010 |
20100027657 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus | 02-04-2010 |
20100074335 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus | 03-25-2010 |
20100118969 | MOTION VECTOR CODING METHOD AND MOTION VECTOR DECODING METHOD - A motion vector coding unit | 05-13-2010 |
20100141485 | VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD - An image coding apparatus provides a run-length encoding unit RLE | 06-10-2010 |
20100150464 | VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD - A variable length coding method is comprised of: a coefficient value scanning step in which an RL sequence generation unit | 06-17-2010 |
20100158485 | VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD - A variable length coding method is comprised of: a coefficient value scanning step in which an RL sequence generation unit | 06-24-2010 |
20100172406 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus (10 | 07-08-2010 |
20100202539 | MOTION VECTOR CALCULATION METHOD - When a block (MB | 08-12-2010 |
20100329350 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - 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 coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted. At that time, information indicating the maximum reference index value is coded and included into the coded image signal, and the commands indicating correspondence between at least one picture number and a plurality of reference indices are generated. | 12-30-2010 |
20110096843 | FIELD/FRAME ADAPTIVE CODING AND DECODING METHOD WITH FIELD/FRAME INDEX AND APPARATUS FOR PERFORMING THE SAME - A moving picture coding method for coding a picture when switching between frame coding and field coding adaptively on a block-by-block basis. The method including determining the maximum number of reference indices for field coding for specifying fields which are to be referred to at the time of field coding, using the maximum number of reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding, and assigning to fields the reference indices for field coding for specifying fields which are to be referred to at the time of field coding, within a range of the determined maximum number thereof, using the reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding. | 04-28-2011 |
20110158316 | PICTURE CODING APPARATUS, PICTURE DECODING APPARATUS AND THE METHODS - A weighting factor mode determination unit determines whether to code an interlaced picture in a field mode or a frame mode, based on a value of a flag “AFF” indicating whether or not to switch between the field mode and the frame mode on a block-by-block basis and notifies switches and a multiplexing unit of the determined mode. The switches select either the field mode or the frame mode according to the notified mode. A field weighting factor coding unit or a frame weighting factor coding unit performs respectively the coding of respective weighting factors when the respective modes are selected. | 06-30-2011 |
20110158321 | PICTURE CODING APPARATUS, PICTURE DECODING APPARATUS AND THE METHODS - A weighting factor mode determination unit determines whether to code an interlaced picture in a field mode or a frame mode, based on a value of a flag “AFF” indicating whether or not to switch between the field mode and the frame mode on a block-by-block basis and notifies switches and a multiplexing unit of the determined mode. The switches select either the field mode or the frame mode according to the notified mode. A field weighting factor coding unit or a frame weighting factor coding unit performs respectively the coding of respective weighting factors when the respective modes are selected. | 06-30-2011 |
20110193728 | VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD - An image coding apparatus provides a run-length encoding unit RLE | 08-11-2011 |
20110243245 | VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD - A variable length coding method is comprised of: a coefficient value scanning step in which an RL sequence generation unit | 10-06-2011 |
20110286527 | MOTION COMPENSATION METHOD, PICTURE CODING METHOD AND PICTURE DECODING METHOD - A picture coding apparatus ( | 11-24-2011 |
20110293007 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - 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 coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted. At that time, information indicating the maximum reference index value is coded and included into the coded image signal, and the commands indicating correspondence between at least one picture number and a plurality of reference indices are generated. | 12-01-2011 |
20120140828 | MOTION VECTOR DERIVATION METHOD, MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - A motion vector derivation unit includes a comparison unit for comparing a parameter TR | 06-07-2012 |
20120163454 | FIELD/FRAME ADAPTIVE DECODING WITH FIELD/FRAME INDEX - A moving picture coding method for coding a picture with switching between frame coding and field coding adaptively on a block-by-block basis includes: determining the maximum number of reference indices for field coding for specifying fields which are to be referred to at the time of field coding, using the maximum number of reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding; and assigning to fields the reference indices for field coding for specifying fields which are to be referred to at the time of field coding, within a range of the determined maximum number thereof, using the reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding. | 06-28-2012 |
20120195514 | MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - According to a picture coding method, a coded picture is stored, as a reference picture, into a storage unit; commands indicating correspondence between reference pictures and reference indices for designating reference pictures and coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted. | 08-02-2012 |
20120213287 | PICTURE ENCODING METHOD AND PICTURE DECODING METHOD - 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 whether or not the decoded picture is a picture for output which needs to be stored until its display time, and storing, in the picture buffer, the picture for reference and the picture for output based on the determination result. | 08-23-2012 |
20120250770 | MOVING PICTURE CODING METHOD AND A MOVING PICTURE DECODING METHOD - A moving picture coding apparatus includes a motion estimation unit ( | 10-04-2012 |
20120275520 | MOTION VECTOR CODING AND DECODING METHODS - A coding apparatus includes a motion vector coding unit that codes an inputted motion vector. A motion vector for each current block is coded based on a difference between the motion vector and a predicted vector obtained from motion vectors of coded neighboring blocks. The predicted vector is generated by one of the following methods: motion vectors referring to the same picture are selected from among the motion vectors for the neighboring blocks; motion vectors of respective neighboring blocks are ordered in a, predetermined order, and the motion vectors of the same order rank are selected from the ordered motion vectors; and the predicted vector of a second motion vector of the current block is the first motion vector, and if the second motion vector and the first motion vector refer to different pictures, the first motion vector is scaled according to the temporal distance between the pictures. | 11-01-2012 |
20120287997 | MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus for performing inter-picture predictive coding for pictures constituting a moving picture is provided with a coding unit for performing predictive error coding for image data; a decoding unit for performing predictive error decoding for an output from the coding unit; a reference picture memory for holding output data from the decoding unit; and a motion vector detection unit for detecting motion vectors on the basis of the decoded image data stored in the memory. When coding a B picture as a target picture, information indicating whether or not the target picture should be used as a reference picture when coding another picture is added as header information. Therefore, in a decoding apparatus for decoding a bit stream Bs outputted from the moving picture coding apparatus, management of a memory for holding the reference picture can be facilitated on the basis of the header information. | 11-15-2012 |
20120328024 | MOTION VECTOR CALCULATION METHOD - When a block (MB | 12-27-2012 |
20120328027 | VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD - A variable length coding method is comprised of: a coefficient value scanning step in which an RL sequence generation unit | 12-27-2012 |
20130034308 | PICTURE CODING METHOD AND PICTURE DECODING METHOD - The method includes the following units: a coefficient number detecting unit ( | 02-07-2013 |