Method for speech recognition and communication device
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Abstract
Speaker-dependent speech recognition is performed upon detecting a speech signal encompassing a voice command. The speech signal is divided into time frames and characterized in each detected time frame by forming a corresponding property vector. A property vector sequence is formed from one or several property vectors and then stored. The property vector sequence is allocated to a sequence of model vectors in a speech resource having a plurality of model vectors. A piece of allocation information indicating allocation of the property vector sequence to a sequence of model vectors is stored, then the voice command allocated to the model vector sequence is identified.
50 Citations
23 Claims
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1-12. -12. (canceled)
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13. A method for speaker-dependent speech recognition, comprising:
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capturing a speech signal, including a speech command, of a speaker;
breaking down the speech signal into time frames;
characterizing the speech signal in each captured time frame by forming a corresponding feature vector;
forming a language-independent feature vector sequence from at least one feature vector;
storing the language-independent feature vector sequence;
assigning the language-independent feature vector sequence to a language-dependent sequence of model vectors in a first language resource which includes a multiplicity of language-dependent model vectors;
storing first assignment information which specifies assignment of the language-independent feature vector sequence to the language-dependent sequence of model vectors;
recognizing the speech command which is assigned to the language-dependent sequence of model vectors;
selecting a second language resource different from the first language resource;
assigning the language-independent feature vector sequence previously stored to a language-dependent model vector sequence in the second language resource; and
storing second assignment information regarding said assigning of the language-independent feature vector sequence to the language-dependent model vector sequence in the second language resource. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A communication device, comprising:
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a microphone recording a speech signal, including a speech command, of a speaker;
a processor processing the speech signal by breaking down the speech signal into time frames, characterizing the speech signal in each captured time frame by forming a corresponding feature vector and forming a language-independent feature vector sequence from at least one feature vector;
a storage unit storing the language-independent feature vector sequence obtained from the speech signal; and
a speech recognition entity, coupled to the microphone, configured for at least speaker-dependent speech recognition by assigning the language-independent feature vector sequence to a language-dependent sequence of model vectors in a first language resource which includes a multiplicity of language-dependent model vectors, storing first assignment information which specifies assignment of the language-independent feature vector sequence to the language-dependent sequence of model vectors, recognizing the speech command which is assigned to the language-dependent sequence of model vectors, selecting a second language resource different from the first language resource, assigning the language-independent feature vector sequence previously stored to a language-dependent model vector sequence in the second language resource, and storing second assignment information corresponding thereto.
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Specification