公开(公告)号：AU2008203058B2

公开(公告)日：2009-07-02

申请号：AU2008203058

申请日：2008-07-10

Applicant: PANASONIC IP CORP AMERICA

Inventor： KONDO SATOSHI ,  HAGAI MAKOTO ,  KADONO SHINYA

IPC: H04N7/26 ,  G06T9/00 ,  H04N7/36 ,  H04N7/46 ,  H04N7/50

公开(公告)号：AU2003221378B9

公开(公告)日：2009-01-08

申请号：AU2003221378

申请日：2003-03-13

Applicant: PANASONIC IP CORP AMERICA

Inventor： MATSUI YOSHINORI ,  KONDO SATOSHI ,  KADONO SHINYA

IPC: H03M7/42 ,  H03M7/40 ,  H04N7/26 ,  H04N7/50

Abstract: The present invention relates to a variable-length encoding method that encodes a unit data included in a picture composed of a plurality of sub-data while referring to a probability table, comprising: a table setting step of setting a probability table to be an initial value based on an initial value of a quantization parameter of the unit data; a judgment step of judging if initialization information related to the initial value of the probability table is necessary to be encoded or not; an initialization information encoding step of encoding the initialization information only when it is judged in the judgment step that the initialization information is necessary to be encoded and setting the probability table to be a predetermined initial value when it is judged in the judgment step that the initialization information is not necessary to be encoded; an encoding parameter obtainment step of obtaining encoding parameters to be used in the encoding of sub-data; a sub-data encoding step of performing an arithmetic encoding on the sub-data with reference to respective encoding parameters; a probability table updating step of updating the probability table based on a value of the encoded sub-data; and an encoded information placement step of placing the encoded initialization information related to the initial value of the probability table in a position in which the encoded initialization information can be obtained before the encoded unit data, and to the corresponding variable-length encoding device.

公开(公告)号：AU2002344460B2

公开(公告)日：2008-04-10

申请号：AU2002344460

申请日：2002-11-06

Applicant: PANASONIC IP CORP AMERICA

Inventor： HAGAI MAKOTO ,  KONDO SATOSHI ,  KADONO SHINYA

IPC: H04N19/577 ,  G06T9/00 ,  H04N19/103

Abstract: According to the present invention, a moving picture coding apparatus (70) for performing inter-picture predictive coding for pictures constituting a moving picture is provided with a coding unit (103) for performing predictive error coding for image data; a decoding unit (105) for performing predictive error decoding for an output from the coding unit (103); a reference picture memory (117) for holding output data from the decoding unit (105); and a motion vector detection unit (108) 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 (70), management of a memory for holding the reference picture can be facilitated on the basis of the header information.

公开(公告)号：AU2003281129B2

公开(公告)日：2007-12-06

申请号：AU2003281129

申请日：2003-07-07

Applicant: PANASONIC IP CORP AMERICA

Inventor： KONDO SATOSHI ,  SHEN SHENG MEI ,  KADONO SHINYA ,  ABE KIYOFUMI ,  FOO TECK WEE ,  HAGAI MAKOTO ,  LIM CHONG SOON

IPC: H04N19/105 ,  G06T9/00 ,  H04N19/114 ,  H04N19/134 ,  H04N19/136 ,  H04N19/152 ,  H04N19/159 ,  H04N19/196 ,  H04N19/423 ,  H04N19/426 ,  H04N19/46 ,  H04N19/50 ,  H04N19/503 ,  H04N19/60 ,  H04N19/61 ,  H04N19/70 ,  H04N19/895 ,  H04N19/91 ,  H04N21/234 ,  H04N21/44

Abstract: An input image is coded and then decoded by referencing an image stored in a picture buffer. The decoded image is checked whether it is a reference image or output image. The decoded image is stored in the picture buffer based upon the checking result. An independent claim is also included for image decoding method.

公开(公告)号：AU2003201906B2

公开(公告)日：2007-09-13

申请号：AU2003201906

申请日：2003-01-08

Applicant: PANASONIC IP CORP AMERICA

Inventor： HAGAI MAKOTO ,  KONDO SATOSHI ,  ABE KIYOFUMI ,  KADONO SHINYA

IPC: H04N19/51 ,  H03M7/36 ,  H04N19/105 ,  H04N19/423 ,  H04N19/50 ,  H04N19/61 ,  H04N19/625

Abstract: 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 has been coded using a motion vector of another block; a prediction step (S106, S108) of deriving a predictive motion vector of the current block using a motion vector calculated from the motion vector of the other block as a motion vector of the neighboring block; and a coding step (S110) of coding the motion vector of the current block using the predictive motion vector.