Speech coding apparatus and method for generating acoustic feature vector component values by combining values of the same features for multiple time intervals
First Claim
1. A speech coding apparatus comprising:
- means for measuring the values of at least first and second different features of an utterance during each of a series of successive time intervals; and
means for generating a feature vector signal for each time interval, each feature vector signal having a first component value equal to a first weighted combination of the values of only one feature of the utterance for at least two time intervals, each feature vector signal having a second component value equal to a second weighted combination, different from the first weighted combination, of the values of only one feature of the utterance for at least two time intervals, said feature vector signals forming a coded representation of the utterance.
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Abstract
A speech coding apparatus and method measures the values of at least first and second different features of an utterance during each of a series of successive time intervals. For each time interval, a feature vector signal has a first component value equal to a first weighted combination of the values of only one feature of the utterance for at least two time intervals. The feature vector signal has a second component value equal to a second weighted combination, different from the first weighted combination, of the values of only one feature of the utterance for at least two time intervals. The resulting feature vector signals for a series of successive time intervals form a coded representation of the utterance. In one embodiment, a first weighted mixture signal has a value equal to a first weighted mixture of the values of the features of the utterance during a single time interval. A second weighted mixture signal has a value equal to a second weighted mixture, different from the first weighted mixture, of the values of the features of the utterance during a single time interval. The first component value of each feature vector signal is equal to a first weighted combination of the values of only the first weighted mixture signals for at least two time intervals, and the second component value of each feature vector signal is equal to a second weighted combination, different from the first weighted combination, of the values of only the second weighted mixture for at least two time intervals.
13 Citations
23 Claims
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1. A speech coding apparatus comprising:
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means for measuring the values of at least first and second different features of an utterance during each of a series of successive time intervals; and means for generating a feature vector signal for each time interval, each feature vector signal having a first component value equal to a first weighted combination of the values of only one feature of the utterance for at least two time intervals, each feature vector signal having a second component value equal to a second weighted combination, different from the first weighted combination, of the values of only one feature of the utterance for at least two time intervals, said feature vector signals forming a coded representation of the utterance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A speech coding method comprising the steps of:
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measuring the values of at least first and second different features of an utterance during each of a series of successive time intervals; and generating a feature vector signal for each time interval, each feature vector signal having a first component value equal to a first weighted combination of the values of only one feature of the utterance for at least two time intervals, each feature vector signal having a second component value equal to a second weighted combination, different from the first weighted combination, of the values of only one feature of the utterance for at least two time intervals, said feature vector signals forming a coded representation of the utterance. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification