Source: http://www.google.com/patents/US7630883?dq=6,263,507
Timestamp: 2014-08-22 06:24:19
Document Index: 12266893

Matched Legal Cases: ['Application No. 07003891', 'Application No. 02765393', 'Application No. 02765393', 'Application No. 2002', 'Application No. 2002', 'Application No. 2003']

Patent US7630883 - Apparatus and method for creating pitch wave signals and apparatus and ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA pitch wave signal creation method as a preliminary process for efficiently coding a speech wave signal having a fluctuated pitch period is provided. A speech signal compressing/expanding apparatus and a speech signal synthesizing apparatus using the method, and a signal processing associated therewith...http://www.google.com/patents/US7630883?utm_source=gb-gplus-sharePatent US7630883 - Apparatus and method for creating pitch wave signals and apparatus and method compressing, expanding and synthesizing speech signals using these pitch wave signalsAdvanced Patent SearchPublication numberUS7630883 B2Publication typeGrantApplication numberUS 10/415,437PCT numberPCT/JP2002/008837Publication dateDec 8, 2009Filing dateAug 30, 2002Priority dateAug 31, 2001Fee statusPaidAlso published asCN1324556C, CN1473322A, DE02765393T1, DE07003891T1, DE60232560D1, DE60234195D1, EP1422690A1, EP1422690A4, EP1422690B1, EP1793370A2, EP1793370A3, EP1793370B1, US7647226, US20040030546, US20070174056, WO2003019527A1Publication number10415437, 415437, PCT/2002/8837, PCT/JP/2/008837, PCT/JP/2/08837, PCT/JP/2002/008837, PCT/JP/2002/08837, PCT/JP2/008837, PCT/JP2/08837, PCT/JP2002/008837, PCT/JP2002/08837, PCT/JP2002008837, PCT/JP200208837, PCT/JP2008837, PCT/JP208837, US 7630883 B2, US 7630883B2, US-B2-7630883, US7630883 B2, US7630883B2InventorsYasushi SatoOriginal AssigneeKabushiki Kaisha KenwoodExport CitationBiBTeX, EndNote, RefManPatent Citations (39), Non-Patent Citations (11), Referenced by (4), Classifications (19), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetApparatus and method for creating pitch wave signals and apparatus and method compressing, expanding and synthesizing speech signals using these pitch wave signalsUS 7630883 B2Abstract A pitch wave signal creation method as a preliminary process for efficiently coding a speech wave signal having a fluctuated pitch period is provided. A speech signal compressing/expanding apparatus and a speech signal synthesizing apparatus using the method, and a signal processing associated therewith are further provided. The pitch wave creation method of the invention is essentially comprised of a method of detecting the instantaneous pitch period of each pitch wave element of the speech wave signal, and a process of converting a corresponding pitch wave element into a normalized pitch wave element having a predetermined fixed time length by expanding and compressing the pitch wave element on a time axis while retaining its wave pattern based on the each detected instantaneous pitch period. The speech signal having a pitch fluctuation can be compressed in high quality and high efficiency by coding or synthesizing the speech wave signal using the pitch wave signal creation method of the invention.
TECHNICAL FIELD The present invention relates to an apparatus and a method for creating pitch wave signals. Also, the present invention relates to a speech signal compressing apparatus, a speech signal expanding apparatus, a speech signal compression method and a speech signal expansion method using such a method for creating pitch wave signals.
BACKGROUND ART In recent years, techniques for compressing speech signals have been used frequently in speech communication using cellular phones and the like. Specific application areas include mainly CODEC (COder/DECoder), speech recognition and speech synthesis.
DISCLOSURE OF THE INVENTION For achieving the above three types of objects of the invention, the present invention is classified broadly into three types. Those three types of inventions are hereinafter referred to as the first invention, second invention and third invention, respectively, for convenience.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a configuration of a pitch wave extracting system according to the embodiment of this invention;
MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention (first, second and third inventions) will be described below with reference to the drawings.
r ⁡ ( 1 ) = 1 N ⁢ ∑ t = 0 N - 1 - 1 ⁢ ⁢ { x ⁡ ( t + 1 ) � x ⁡ ( t ) } [ Formula ⁢ ⁢ 1 ] wherein N is the total number of samples of speech data, and x(α) is the value of the αth sample from the head of speech data.
cor = ∑ i = 1 n ⁢ ⁢ { f ⁡ ( i - ϕ ) � g ⁡ ( i ) } [ Formula ⁢ ⁢ 2 ] wherein n is the total number of samples in the section, f(β) is the value of the βth sample from the head of speech data in the section, and g(γ) is the value of the γth sample from the head of the pitch signal in the section).
INDUSTRIAL APPLICABILITY As described above, according to the first invention, a pitch wave signal creating apparatus and a pitch wave signal creation method functioning effectively as a preliminary process for efficiently coding a speech signal with a pitch having a fluctuation are achieved. Also, according to the second invention, a speech signal compressing apparatus efficiently compressing data representing a speech sound or compressing data representing a speech sound having a fluctuation in high sound quality, a speech signal expanding apparatus, a speech signal compression method and a speech signal expansion method are achieved.
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Ishikawa et al., Speech Synthesis Software for a 32-Bit Microprocessor, IEEE Transactions on Consumer Electronics, vol. 44, No. 3, Aug. 1998, pp. 1173-1182.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8214216 *Jun 3, 2004Jul 3, 2012Kabushiki Kaisha KenwoodSpeech synthesis for synthesizing missing partsUS8271284 *Jul 4, 2007Sep 18, 2012Nec CorporationSpeech synthesis device, method, and programUS20060241860 *Oct 7, 2005Oct 26, 2006Microsoft CorporationVirtual earth mappingUS20090177475 *Jul 4, 2007Jul 9, 2009Nec CorporationSpeech synthesis device, method, and program* Cited by examinerClassifications U.S. Classification704/207, 704/218, 704/258International ClassificationG10L13/08, G10L21/003, G10L21/013, G10L19/09, G10L21/04, G10L19/14, G10L11/04, G10L19/00Cooperative ClassificationG10L13/08, G10L21/003, G10L21/013, G10L19/09, G10L21/04European ClassificationG10L13/08, G10L21/003, G10L21/04Legal EventsDateCodeEventDescriptionMar 8, 2013FPAYFee paymentYear of fee payment: 4Apr 6, 2012ASAssignmentEffective date: 20111001Owner name: JVC KENWOOD CORPORATION, JAPANFree format text: MERGER;ASSIGNOR:KENWOOD CORPORATION;REEL/FRAME:028001/0636Apr 29, 2003ASAssignmentOwner name: KABUSHIKI KAISHA KENWOOD, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SATO, YASUSHI;REEL/FRAME:014512/0820Effective date: 20030407RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google