EP 0713208 B1 20020220 - Pitch lag estimation system
Title (en)
Pitch lag estimation system
Title (de)
System zur Schätzung der Grundfrequenz
Title (fr)
Système d'estimation de la fréquence fondamentale
Publication
Application
Priority
US 34249494 A 19941121
Abstract (en)
[origin: EP0713208A2] A pitch estimation device and method utilizing a multi-resolution approach to estimate speech pitch lag. The system includes sampling the speech 602 and applying, alternately, a discrete Fourier transform 606 and squaring the result 608. A DFT on the squared amplitude is then performed 610 to transform the speech samples into another domain. An initial pitch lag can then be found with lower resolution. After getting the low-resolution pitch lag estimate, a refined algorithm is applied 618 to get a higher-resolution pitch lag. The refined algorithm is based on minimizing the prediction error in the time domain. The refined pitch lag then can be used directly in the speech coding. <IMAGE>
IPC 1-7
IPC 8 full level
G10L 19/02 (2013.01); G10L 19/038 (2013.01); G10L 19/04 (2013.01); G10L 19/09 (2013.01); G10L 19/16 (2013.01); G10L 21/003 (2013.01); G10L 21/04 (2013.01); G10L 25/90 (2013.01)
CPC (source: EP)
G10L 25/90 (2013.01); G10L 25/24 (2013.01); G10L 25/27 (2013.01); G10L 2019/0011 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0713208 A2 19960522; EP 0713208 A3 19971210; EP 0713208 B1 20020220; DE 69525508 D1 20020328; DE 69525508 T2 20020620; JP H08211895 A 19960820
DOCDB simple family (application)
EP 95118142 A 19951117; DE 69525508 T 19951117; JP 29526695 A 19951114