公开(公告)号：EP2493205A4

公开(公告)日：2012-12-26

申请号：EP10824681

申请日：2010-03-25

申请人： NIPPON TELEGRAPH & TELEPHONE

发明人： YAMAGISHI KAZUHISA ,  HAYASHI TAKANORI ,  OKAMOTO JUN

IPC分类号： H04N17/00 ,  H04N7/173 ,  H04N7/26

CPC分类号： H04N17/004 ,  G06T7/0002 ,  G06T2207/10016 ,  G06T2207/30168

公开(公告)号：EP2229001A4

公开(公告)日：2010-11-17

申请号：EP08870279

申请日：2008-12-15

申请人： NIPPON TELEGRAPH & TELEPHONE

发明人： YAMAGISHI KAZUHISA ,  HAYASHI TAKANORI

IPC分类号： H04N17/00 ,  H04L12/24 ,  H04L12/70 ,  H04N19/00 ,  H04N19/102 ,  H04N19/136 ,  H04N19/146 ,  H04N19/166 ,  H04N19/172 ,  H04N19/174 ,  H04N19/177 ,  H04N19/196 ,  H04N19/467 ,  H04N19/625 ,  H04N19/63 ,  H04N19/70

CPC分类号： H04N17/004 ,  H04L43/0829 ,  H04L43/0894

公开(公告)号：EP2018068A4

公开(公告)日：2011-10-05

申请号：EP06833535

申请日：2006-11-28

申请人： NIPPON TELEGRAPH & TELEPHONE

发明人： YAMAGISHI KAZUHISA ,  HAYASHI TAKANORI

IPC分类号： H04N17/00 ,  H04L12/26 ,  H04N7/173 ,  H04N7/46 ,  H04N7/50 ,  H04N17/04 ,  H04N19/00 ,  H04N19/115 ,  H04N19/132 ,  H04N19/134 ,  H04N19/162 ,  H04N19/196

CPC分类号： H04L43/08 ,  H04L43/0894 ,  H04N17/004 ,  H04N19/132 ,  H04N19/146 ,  H04N19/154 ,  H04N19/156 ,  H04N19/164 ,  H04N19/587 ,  H04N19/61

摘要： In estimating subjective video quality corresponding to main parameters (121/221) which are input as an input coding bit rate (121B/221B) representing the number of coding bit rates per unit time and an input frame rate (121A/221A) representing the number of frames per unit time of an audiovisual medium, an estimation model specifying unit specifies, on the basis of the input coding bit rate (121B/input frame rate (221A)), an estimation model (122/222) representing the relationship between subjective video quality and the frame rate (/coding bit rate) of the audiovisual medium. Subjective video quality corresponding to the input frame rate (121A/input coding bit rate 221B) is estimated by using the specified estimation model (122/222) and output as an estimation value (123/223).

公开(公告)号：EP2288087A4

公开(公告)日：2014-07-23

申请号：EP09762362

申请日：2009-05-25

申请人： NIPPON TELEGRAPH & TELEPHONE

发明人： EGI NORITSUGU ,  HAYASHI TAKANORI

IPC分类号： G10L19/00 ,  G10L25/69 ,  H04L12/26 ,  H04L29/06 ,  H04M3/22 ,  H04M11/06

CPC分类号： G10L25/69 ,  H04L43/0835 ,  H04L65/80 ,  H04M3/2236

摘要： An audio quality estimation apparatus includes an audio packet loss frequency calculation unit (11) which, when at least one audio packet to be assessed exists in singly or continuously generated IP packet losses, calculates an audio packet loss frequency based on information of received IP packets by counting the packet losses as an audio packet loss of one time regardless of the continuous length, an average influence time calculation unit (12) which calculates, based on information of received IP packets, an average influence time serving as an average time during which audio quality is influenced when the audio packet loss frequency is 1, and a subjective quality assessment value estimation unit (22) which estimates a subjective quality assessment value based on the audio packet loss frequency and average influence time.

公开(公告)号：EP2018069A4

公开(公告)日：2011-10-05

申请号：EP06833537

申请日：2006-11-28

申请人： NIPPON TELEGRAPH & TELEPHONE

发明人： YAMAGISHI KAZUHISA ,  HAYASHI TAKANORI

IPC分类号： H04N19/89 ,  H04L12/26 ,  H04N7/173 ,  H04N17/00 ,  H04N17/04 ,  H04N19/00

CPC分类号： H04N19/587 ,  H04L43/045 ,  H04L43/0835 ,  H04N17/004 ,  H04N19/132 ,  H04N19/146 ,  H04N19/154 ,  H04N19/156 ,  H04N19/166 ,  H04N19/61 ,  H04N19/89

公开(公告)号：EP1924101A4

公开(公告)日：2011-09-14

申请号：EP06797532

申请日：2006-09-06

申请人： NIPPON TELEGRAPH & TELEPHONE

发明人： HAYASHI TAKANORI ,  YAMAGISHI KAZUHISA

IPC分类号： H04N17/00

CPC分类号： H04N17/004 ,  H04N5/04