Title:
SAMPLING RATE CONVERTING APPARATUS, ENCODING APPARATUS, DECODING APPARATUS, AND METHODS THEREOF
Document Type and Number:
WIPO Patent Application WO/2005/031705
Kind Code:
A1
Abstract:
An encoding apparatus that allows the circuit scale to be reduced and also allows the amounts of processing and calculation of encoding to be reduced. In this apparatus, a frequency range converting part (103) uses an analytic length 2Na to frequency analyze a signal sampled by use of a sampling rate Fx, thereby calculating a first spectrum S1(k) (0 ≤ k < Na). A band expanding part (104) expands the effective frequency band of the first spectrum S1(k) to 0 ≤ k < Nb such that a new spectrum can be added to the frequency k = Na of the first spectrum S1(k) and higher frequencies. An expanding spectrum adding part (105) adds an externally input expanding spectrum S1'(k) (Na ≤ k
Inventors:
OSHIKIRI MASAHIRO
Application Number:
PCT/JP2004/014215
Publication Date:
April 07, 2005
Filing Date:
September 29, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
OSHIKIRI MASAHIRO
OSHIKIRI MASAHIRO
International Classes:
G10L19/00; G10L19/16; G10L21/0388; H04B14/04; (IPC1-7): G10L19/00; G10L21/02
Domestic Patent References:
| WO1998057436A2 | 1998-12-17 |
Foreign References:
| JP2001356788A | 2001-12-26 |
Other References:
TAKAMIZAWA Y. ET AL.: "MPEG-4 audio taiiki kakucho decoder software no kaihatsu", 2003 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SOGO TAIKAI KOEN RONBUNSHU, vol. D-14-10, 3 March 2003 (2003-03-03), pages 177, XP002986228
OSHIKIRI M. ET AL.: "Jikan-shuhasu ryoiki no keisu no tekio sentaku vector ryoshika o mochiita 10 kHz taiiki scalable fugoka hoshiki", FIT 2003 JOHO KAGAKU GIJUTSU FORUM KOEN RONBUNSHU, vol. F-017, 25 August 2003 (2003-08-25), pages 239 - 240, XP002986229
OSHIKIRI M. ET AL.: "Pitch filtering ni yoru taiiki kakucho gijutsu o mochiita 7/10/15kHz taiiki scalable onsei fugoka hoshiki", THE ACOUSTICAL SOCIETY OF JAPAN 2004 NEN SHUNKI KENKYU HAPPYOKAI KOEN RONBUNSHU I, vol. 3-11-4, 17 March 2004 (2004-03-17), pages 327 - 328, XP002986230
E. MOULINES; J. LAROCHE: "Non-parametric techniques for pitch-scale and time-scale modification of speech", SPEECH COMMUNICATION, vol. 16, 1995, pages 175 - 205, XP004024959, DOI: doi:10.1016/0167-6393(94)00054-E
See also references of EP 1669981A4
OSHIKIRI M. ET AL.: "Jikan-shuhasu ryoiki no keisu no tekio sentaku vector ryoshika o mochiita 10 kHz taiiki scalable fugoka hoshiki", FIT 2003 JOHO KAGAKU GIJUTSU FORUM KOEN RONBUNSHU, vol. F-017, 25 August 2003 (2003-08-25), pages 239 - 240, XP002986229
OSHIKIRI M. ET AL.: "Pitch filtering ni yoru taiiki kakucho gijutsu o mochiita 7/10/15kHz taiiki scalable onsei fugoka hoshiki", THE ACOUSTICAL SOCIETY OF JAPAN 2004 NEN SHUNKI KENKYU HAPPYOKAI KOEN RONBUNSHU I, vol. 3-11-4, 17 March 2004 (2004-03-17), pages 327 - 328, XP002986230
E. MOULINES; J. LAROCHE: "Non-parametric techniques for pitch-scale and time-scale modification of speech", SPEECH COMMUNICATION, vol. 16, 1995, pages 175 - 205, XP004024959, DOI: doi:10.1016/0167-6393(94)00054-E
See also references of EP 1669981A4
Attorney, Agent or Firm:
Washida, Kimihito (Shintoshicenter Bldg. 24-1, Tsurumaki 1-chom, Tama-shi Tokyo 34, JP)
Download PDF: