| 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 |
| 20090010556 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, AND IMAGE CODING PROGRAM FOR CODING AT LEAST ONE STILL FRAME WITH STILL FRAME CODING HAVING A HIGHER QUALITY THAN NORMAL FRAME CODING OF OTHER FRAMES - An image coding apparatus includes a still frame coding judgement unit for judging whether a target frame to be coded is a still frame or not from a difference value between the target frame and an immediately previous reference frame, and a quantization parameter control unit for performing control of a quantization parameter value to be used for coding, on an initial one frame at which an image starts to come into a standstill, wherein the initial frame is subjected to coding with less coding error as compared with coding for other frames. | 01-08-2009 |
| 20090034616 | PICTURE CODING METHOD AND PICTURE DECODING METHOD - The method includes the following units: a coefficient number detecting unit ( | 02-05-2009 |
| 20090103614 | Picture coding method and picture decoding method - A picture coding apparatus ( | 04-23-2009 |
| 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 |
| 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 |
| 20100111191 | PICTURE CODING AND DECODING APPARATUSES AND METHODS PERFORMING VARIABLE LENGTH CODING AND DECODING ON A SLICE HEADER STREAM AND ARITHMETIC CODING AND DECODING ON A SLICE DATA STREAM - A frame coding unit generates individual picture signal information from a moving picture signal, and outputs a frame code value which is a numeric value to be obtained as a result of coding picture signal information of each frame. A variable length coding unit decomposes the frame code value into unit frame code values which are basic units of coding, converts the unit frame code values into frame code words using only a single code table, and constructs a frame stream by combining the converted frame code words. A multiplexing unit multiplexes a header stream which is constructed through a method equivalent to a conventional method and the frame stream, and constructs a picture coded signal. | 05-06-2010 |
| 20100118969 | MOTION VECTOR CODING METHOD AND MOTION VECTOR DECODING METHOD - A motion vector coding unit | 05-13-2010 |
| 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 |
